mirror of
https://github.com/woodpecker-ci/woodpecker.git
synced 2024-12-23 08:56:29 +00:00
fix vendor
This commit is contained in:
parent
d5200ad8b3
commit
a0661e3ccd
25 changed files with 15928 additions and 14 deletions
27
vendor/golang.org/x/text/LICENSE
generated
vendored
Normal file
27
vendor/golang.org/x/text/LICENSE
generated
vendored
Normal file
|
@ -0,0 +1,27 @@
|
|||
Copyright (c) 2009 The Go Authors. All rights reserved.
|
||||
|
||||
Redistribution and use in source and binary forms, with or without
|
||||
modification, are permitted provided that the following conditions are
|
||||
met:
|
||||
|
||||
* Redistributions of source code must retain the above copyright
|
||||
notice, this list of conditions and the following disclaimer.
|
||||
* Redistributions in binary form must reproduce the above
|
||||
copyright notice, this list of conditions and the following disclaimer
|
||||
in the documentation and/or other materials provided with the
|
||||
distribution.
|
||||
* Neither the name of Google Inc. nor the names of its
|
||||
contributors may be used to endorse or promote products derived from
|
||||
this software without specific prior written permission.
|
||||
|
||||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
22
vendor/golang.org/x/text/PATENTS
generated
vendored
Normal file
22
vendor/golang.org/x/text/PATENTS
generated
vendored
Normal file
|
@ -0,0 +1,22 @@
|
|||
Additional IP Rights Grant (Patents)
|
||||
|
||||
"This implementation" means the copyrightable works distributed by
|
||||
Google as part of the Go project.
|
||||
|
||||
Google hereby grants to You a perpetual, worldwide, non-exclusive,
|
||||
no-charge, royalty-free, irrevocable (except as stated in this section)
|
||||
patent license to make, have made, use, offer to sell, sell, import,
|
||||
transfer and otherwise run, modify and propagate the contents of this
|
||||
implementation of Go, where such license applies only to those patent
|
||||
claims, both currently owned or controlled by Google and acquired in
|
||||
the future, licensable by Google that are necessarily infringed by this
|
||||
implementation of Go. This grant does not include claims that would be
|
||||
infringed only as a consequence of further modification of this
|
||||
implementation. If you or your agent or exclusive licensee institute or
|
||||
order or agree to the institution of patent litigation against any
|
||||
entity (including a cross-claim or counterclaim in a lawsuit) alleging
|
||||
that this implementation of Go or any code incorporated within this
|
||||
implementation of Go constitutes direct or contributory patent
|
||||
infringement, or inducement of patent infringement, then any patent
|
||||
rights granted to you under this License for this implementation of Go
|
||||
shall terminate as of the date such litigation is filed.
|
342
vendor/golang.org/x/text/secure/bidirule/bidirule.go
generated
vendored
Normal file
342
vendor/golang.org/x/text/secure/bidirule/bidirule.go
generated
vendored
Normal file
|
@ -0,0 +1,342 @@
|
|||
// Copyright 2016 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// Package bidirule implements the Bidi Rule defined by RFC 5893.
|
||||
//
|
||||
// This package is under development. The API may change without notice and
|
||||
// without preserving backward compatibility.
|
||||
package bidirule
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"unicode/utf8"
|
||||
|
||||
"golang.org/x/text/transform"
|
||||
"golang.org/x/text/unicode/bidi"
|
||||
)
|
||||
|
||||
// This file contains an implementation of RFC 5893: Right-to-Left Scripts for
|
||||
// Internationalized Domain Names for Applications (IDNA)
|
||||
//
|
||||
// A label is an individual component of a domain name. Labels are usually
|
||||
// shown separated by dots; for example, the domain name "www.example.com" is
|
||||
// composed of three labels: "www", "example", and "com".
|
||||
//
|
||||
// An RTL label is a label that contains at least one character of class R, AL,
|
||||
// or AN. An LTR label is any label that is not an RTL label.
|
||||
//
|
||||
// A "Bidi domain name" is a domain name that contains at least one RTL label.
|
||||
//
|
||||
// The following guarantees can be made based on the above:
|
||||
//
|
||||
// o In a domain name consisting of only labels that satisfy the rule,
|
||||
// the requirements of Section 3 are satisfied. Note that even LTR
|
||||
// labels and pure ASCII labels have to be tested.
|
||||
//
|
||||
// o In a domain name consisting of only LDH labels (as defined in the
|
||||
// Definitions document [RFC5890]) and labels that satisfy the rule,
|
||||
// the requirements of Section 3 are satisfied as long as a label
|
||||
// that starts with an ASCII digit does not come after a
|
||||
// right-to-left label.
|
||||
//
|
||||
// No guarantee is given for other combinations.
|
||||
|
||||
// ErrInvalid indicates a label is invalid according to the Bidi Rule.
|
||||
var ErrInvalid = errors.New("bidirule: failed Bidi Rule")
|
||||
|
||||
type ruleState uint8
|
||||
|
||||
const (
|
||||
ruleInitial ruleState = iota
|
||||
ruleLTR
|
||||
ruleLTRFinal
|
||||
ruleRTL
|
||||
ruleRTLFinal
|
||||
ruleInvalid
|
||||
)
|
||||
|
||||
type ruleTransition struct {
|
||||
next ruleState
|
||||
mask uint16
|
||||
}
|
||||
|
||||
var transitions = [...][2]ruleTransition{
|
||||
// [2.1] The first character must be a character with Bidi property L, R, or
|
||||
// AL. If it has the R or AL property, it is an RTL label; if it has the L
|
||||
// property, it is an LTR label.
|
||||
ruleInitial: {
|
||||
{ruleLTRFinal, 1 << bidi.L},
|
||||
{ruleRTLFinal, 1<<bidi.R | 1<<bidi.AL},
|
||||
},
|
||||
ruleRTL: {
|
||||
// [2.3] In an RTL label, the end of the label must be a character with
|
||||
// Bidi property R, AL, EN, or AN, followed by zero or more characters
|
||||
// with Bidi property NSM.
|
||||
{ruleRTLFinal, 1<<bidi.R | 1<<bidi.AL | 1<<bidi.EN | 1<<bidi.AN},
|
||||
|
||||
// [2.2] In an RTL label, only characters with the Bidi properties R,
|
||||
// AL, AN, EN, ES, CS, ET, ON, BN, or NSM are allowed.
|
||||
// We exclude the entries from [2.3]
|
||||
{ruleRTL, 1<<bidi.ES | 1<<bidi.CS | 1<<bidi.ET | 1<<bidi.ON | 1<<bidi.BN | 1<<bidi.NSM},
|
||||
},
|
||||
ruleRTLFinal: {
|
||||
// [2.3] In an RTL label, the end of the label must be a character with
|
||||
// Bidi property R, AL, EN, or AN, followed by zero or more characters
|
||||
// with Bidi property NSM.
|
||||
{ruleRTLFinal, 1<<bidi.R | 1<<bidi.AL | 1<<bidi.EN | 1<<bidi.AN | 1<<bidi.NSM},
|
||||
|
||||
// [2.2] In an RTL label, only characters with the Bidi properties R,
|
||||
// AL, AN, EN, ES, CS, ET, ON, BN, or NSM are allowed.
|
||||
// We exclude the entries from [2.3] and NSM.
|
||||
{ruleRTL, 1<<bidi.ES | 1<<bidi.CS | 1<<bidi.ET | 1<<bidi.ON | 1<<bidi.BN},
|
||||
},
|
||||
ruleLTR: {
|
||||
// [2.6] In an LTR label, the end of the label must be a character with
|
||||
// Bidi property L or EN, followed by zero or more characters with Bidi
|
||||
// property NSM.
|
||||
{ruleLTRFinal, 1<<bidi.L | 1<<bidi.EN},
|
||||
|
||||
// [2.5] In an LTR label, only characters with the Bidi properties L,
|
||||
// EN, ES, CS, ET, ON, BN, or NSM are allowed.
|
||||
// We exclude the entries from [2.6].
|
||||
{ruleLTR, 1<<bidi.ES | 1<<bidi.CS | 1<<bidi.ET | 1<<bidi.ON | 1<<bidi.BN | 1<<bidi.NSM},
|
||||
},
|
||||
ruleLTRFinal: {
|
||||
// [2.6] In an LTR label, the end of the label must be a character with
|
||||
// Bidi property L or EN, followed by zero or more characters with Bidi
|
||||
// property NSM.
|
||||
{ruleLTRFinal, 1<<bidi.L | 1<<bidi.EN | 1<<bidi.NSM},
|
||||
|
||||
// [2.5] In an LTR label, only characters with the Bidi properties L,
|
||||
// EN, ES, CS, ET, ON, BN, or NSM are allowed.
|
||||
// We exclude the entries from [2.6].
|
||||
{ruleLTR, 1<<bidi.ES | 1<<bidi.CS | 1<<bidi.ET | 1<<bidi.ON | 1<<bidi.BN},
|
||||
},
|
||||
ruleInvalid: {
|
||||
{ruleInvalid, 0},
|
||||
{ruleInvalid, 0},
|
||||
},
|
||||
}
|
||||
|
||||
// [2.4] In an RTL label, if an EN is present, no AN may be present, and
|
||||
// vice versa.
|
||||
const exclusiveRTL = uint16(1<<bidi.EN | 1<<bidi.AN)
|
||||
|
||||
// From RFC 5893
|
||||
// An RTL label is a label that contains at least one character of type
|
||||
// R, AL, or AN.
|
||||
//
|
||||
// An LTR label is any label that is not an RTL label.
|
||||
|
||||
// Direction reports the direction of the given label as defined by RFC 5893.
|
||||
// The Bidi Rule does not have to be applied to labels of the category
|
||||
// LeftToRight.
|
||||
func Direction(b []byte) bidi.Direction {
|
||||
for i := 0; i < len(b); {
|
||||
e, sz := bidi.Lookup(b[i:])
|
||||
if sz == 0 {
|
||||
i++
|
||||
}
|
||||
c := e.Class()
|
||||
if c == bidi.R || c == bidi.AL || c == bidi.AN {
|
||||
return bidi.RightToLeft
|
||||
}
|
||||
i += sz
|
||||
}
|
||||
return bidi.LeftToRight
|
||||
}
|
||||
|
||||
// DirectionString reports the direction of the given label as defined by RFC
|
||||
// 5893. The Bidi Rule does not have to be applied to labels of the category
|
||||
// LeftToRight.
|
||||
func DirectionString(s string) bidi.Direction {
|
||||
for i := 0; i < len(s); {
|
||||
e, sz := bidi.LookupString(s[i:])
|
||||
if sz == 0 {
|
||||
i++
|
||||
}
|
||||
c := e.Class()
|
||||
if c == bidi.R || c == bidi.AL || c == bidi.AN {
|
||||
return bidi.RightToLeft
|
||||
}
|
||||
i += sz
|
||||
}
|
||||
return bidi.LeftToRight
|
||||
}
|
||||
|
||||
// Valid reports whether b conforms to the BiDi rule.
|
||||
func Valid(b []byte) bool {
|
||||
var t Transformer
|
||||
if n, ok := t.advance(b); !ok || n < len(b) {
|
||||
return false
|
||||
}
|
||||
return t.isFinal()
|
||||
}
|
||||
|
||||
// ValidString reports whether s conforms to the BiDi rule.
|
||||
func ValidString(s string) bool {
|
||||
var t Transformer
|
||||
if n, ok := t.advanceString(s); !ok || n < len(s) {
|
||||
return false
|
||||
}
|
||||
return t.isFinal()
|
||||
}
|
||||
|
||||
// New returns a Transformer that verifies that input adheres to the Bidi Rule.
|
||||
func New() *Transformer {
|
||||
return &Transformer{}
|
||||
}
|
||||
|
||||
// Transformer implements transform.Transform.
|
||||
type Transformer struct {
|
||||
state ruleState
|
||||
hasRTL bool
|
||||
seen uint16
|
||||
}
|
||||
|
||||
// A rule can only be violated for "Bidi Domain names", meaning if one of the
|
||||
// following categories has been observed.
|
||||
func (t *Transformer) isRTL() bool {
|
||||
const isRTL = 1<<bidi.R | 1<<bidi.AL | 1<<bidi.AN
|
||||
return t.seen&isRTL != 0
|
||||
}
|
||||
|
||||
func (t *Transformer) isFinal() bool {
|
||||
if !t.isRTL() {
|
||||
return true
|
||||
}
|
||||
return t.state == ruleLTRFinal || t.state == ruleRTLFinal || t.state == ruleInitial
|
||||
}
|
||||
|
||||
// Reset implements transform.Transformer.
|
||||
func (t *Transformer) Reset() { *t = Transformer{} }
|
||||
|
||||
// Transform implements transform.Transformer. This Transformer has state and
|
||||
// needs to be reset between uses.
|
||||
func (t *Transformer) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
if len(dst) < len(src) {
|
||||
src = src[:len(dst)]
|
||||
atEOF = false
|
||||
err = transform.ErrShortDst
|
||||
}
|
||||
n, err1 := t.Span(src, atEOF)
|
||||
copy(dst, src[:n])
|
||||
if err == nil || err1 != nil && err1 != transform.ErrShortSrc {
|
||||
err = err1
|
||||
}
|
||||
return n, n, err
|
||||
}
|
||||
|
||||
// Span returns the first n bytes of src that conform to the Bidi rule.
|
||||
func (t *Transformer) Span(src []byte, atEOF bool) (n int, err error) {
|
||||
if t.state == ruleInvalid && t.isRTL() {
|
||||
return 0, ErrInvalid
|
||||
}
|
||||
n, ok := t.advance(src)
|
||||
switch {
|
||||
case !ok:
|
||||
err = ErrInvalid
|
||||
case n < len(src):
|
||||
if !atEOF {
|
||||
err = transform.ErrShortSrc
|
||||
break
|
||||
}
|
||||
err = ErrInvalid
|
||||
case !t.isFinal():
|
||||
err = ErrInvalid
|
||||
}
|
||||
return n, err
|
||||
}
|
||||
|
||||
// Precomputing the ASCII values decreases running time for the ASCII fast path
|
||||
// by about 30%.
|
||||
var asciiTable [128]bidi.Properties
|
||||
|
||||
func init() {
|
||||
for i := range asciiTable {
|
||||
p, _ := bidi.LookupRune(rune(i))
|
||||
asciiTable[i] = p
|
||||
}
|
||||
}
|
||||
|
||||
func (t *Transformer) advance(s []byte) (n int, ok bool) {
|
||||
var e bidi.Properties
|
||||
var sz int
|
||||
for n < len(s) {
|
||||
if s[n] < utf8.RuneSelf {
|
||||
e, sz = asciiTable[s[n]], 1
|
||||
} else {
|
||||
e, sz = bidi.Lookup(s[n:])
|
||||
if sz <= 1 {
|
||||
if sz == 1 {
|
||||
// We always consider invalid UTF-8 to be invalid, even if
|
||||
// the string has not yet been determined to be RTL.
|
||||
// TODO: is this correct?
|
||||
return n, false
|
||||
}
|
||||
return n, true // incomplete UTF-8 encoding
|
||||
}
|
||||
}
|
||||
// TODO: using CompactClass would result in noticeable speedup.
|
||||
// See unicode/bidi/prop.go:Properties.CompactClass.
|
||||
c := uint16(1 << e.Class())
|
||||
t.seen |= c
|
||||
if t.seen&exclusiveRTL == exclusiveRTL {
|
||||
t.state = ruleInvalid
|
||||
return n, false
|
||||
}
|
||||
switch tr := transitions[t.state]; {
|
||||
case tr[0].mask&c != 0:
|
||||
t.state = tr[0].next
|
||||
case tr[1].mask&c != 0:
|
||||
t.state = tr[1].next
|
||||
default:
|
||||
t.state = ruleInvalid
|
||||
if t.isRTL() {
|
||||
return n, false
|
||||
}
|
||||
}
|
||||
n += sz
|
||||
}
|
||||
return n, true
|
||||
}
|
||||
|
||||
func (t *Transformer) advanceString(s string) (n int, ok bool) {
|
||||
var e bidi.Properties
|
||||
var sz int
|
||||
for n < len(s) {
|
||||
if s[n] < utf8.RuneSelf {
|
||||
e, sz = asciiTable[s[n]], 1
|
||||
} else {
|
||||
e, sz = bidi.LookupString(s[n:])
|
||||
if sz <= 1 {
|
||||
if sz == 1 {
|
||||
return n, false // invalid UTF-8
|
||||
}
|
||||
return n, true // incomplete UTF-8 encoding
|
||||
}
|
||||
}
|
||||
// TODO: using CompactClass results in noticeable speedup.
|
||||
// See unicode/bidi/prop.go:Properties.CompactClass.
|
||||
c := uint16(1 << e.Class())
|
||||
t.seen |= c
|
||||
if t.seen&exclusiveRTL == exclusiveRTL {
|
||||
t.state = ruleInvalid
|
||||
return n, false
|
||||
}
|
||||
switch tr := transitions[t.state]; {
|
||||
case tr[0].mask&c != 0:
|
||||
t.state = tr[0].next
|
||||
case tr[1].mask&c != 0:
|
||||
t.state = tr[1].next
|
||||
default:
|
||||
t.state = ruleInvalid
|
||||
if t.isRTL() {
|
||||
return n, false
|
||||
}
|
||||
}
|
||||
n += sz
|
||||
}
|
||||
return n, true
|
||||
}
|
705
vendor/golang.org/x/text/transform/transform.go
generated
vendored
Normal file
705
vendor/golang.org/x/text/transform/transform.go
generated
vendored
Normal file
|
@ -0,0 +1,705 @@
|
|||
// Copyright 2013 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// Package transform provides reader and writer wrappers that transform the
|
||||
// bytes passing through as well as various transformations. Example
|
||||
// transformations provided by other packages include normalization and
|
||||
// conversion between character sets.
|
||||
package transform // import "golang.org/x/text/transform"
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"errors"
|
||||
"io"
|
||||
"unicode/utf8"
|
||||
)
|
||||
|
||||
var (
|
||||
// ErrShortDst means that the destination buffer was too short to
|
||||
// receive all of the transformed bytes.
|
||||
ErrShortDst = errors.New("transform: short destination buffer")
|
||||
|
||||
// ErrShortSrc means that the source buffer has insufficient data to
|
||||
// complete the transformation.
|
||||
ErrShortSrc = errors.New("transform: short source buffer")
|
||||
|
||||
// ErrEndOfSpan means that the input and output (the transformed input)
|
||||
// are not identical.
|
||||
ErrEndOfSpan = errors.New("transform: input and output are not identical")
|
||||
|
||||
// errInconsistentByteCount means that Transform returned success (nil
|
||||
// error) but also returned nSrc inconsistent with the src argument.
|
||||
errInconsistentByteCount = errors.New("transform: inconsistent byte count returned")
|
||||
|
||||
// errShortInternal means that an internal buffer is not large enough
|
||||
// to make progress and the Transform operation must be aborted.
|
||||
errShortInternal = errors.New("transform: short internal buffer")
|
||||
)
|
||||
|
||||
// Transformer transforms bytes.
|
||||
type Transformer interface {
|
||||
// Transform writes to dst the transformed bytes read from src, and
|
||||
// returns the number of dst bytes written and src bytes read. The
|
||||
// atEOF argument tells whether src represents the last bytes of the
|
||||
// input.
|
||||
//
|
||||
// Callers should always process the nDst bytes produced and account
|
||||
// for the nSrc bytes consumed before considering the error err.
|
||||
//
|
||||
// A nil error means that all of the transformed bytes (whether freshly
|
||||
// transformed from src or left over from previous Transform calls)
|
||||
// were written to dst. A nil error can be returned regardless of
|
||||
// whether atEOF is true. If err is nil then nSrc must equal len(src);
|
||||
// the converse is not necessarily true.
|
||||
//
|
||||
// ErrShortDst means that dst was too short to receive all of the
|
||||
// transformed bytes. ErrShortSrc means that src had insufficient data
|
||||
// to complete the transformation. If both conditions apply, then
|
||||
// either error may be returned. Other than the error conditions listed
|
||||
// here, implementations are free to report other errors that arise.
|
||||
Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error)
|
||||
|
||||
// Reset resets the state and allows a Transformer to be reused.
|
||||
Reset()
|
||||
}
|
||||
|
||||
// SpanningTransformer extends the Transformer interface with a Span method
|
||||
// that determines how much of the input already conforms to the Transformer.
|
||||
type SpanningTransformer interface {
|
||||
Transformer
|
||||
|
||||
// Span returns a position in src such that transforming src[:n] results in
|
||||
// identical output src[:n] for these bytes. It does not necessarily return
|
||||
// the largest such n. The atEOF argument tells whether src represents the
|
||||
// last bytes of the input.
|
||||
//
|
||||
// Callers should always account for the n bytes consumed before
|
||||
// considering the error err.
|
||||
//
|
||||
// A nil error means that all input bytes are known to be identical to the
|
||||
// output produced by the Transformer. A nil error can be be returned
|
||||
// regardless of whether atEOF is true. If err is nil, then then n must
|
||||
// equal len(src); the converse is not necessarily true.
|
||||
//
|
||||
// ErrEndOfSpan means that the Transformer output may differ from the
|
||||
// input after n bytes. Note that n may be len(src), meaning that the output
|
||||
// would contain additional bytes after otherwise identical output.
|
||||
// ErrShortSrc means that src had insufficient data to determine whether the
|
||||
// remaining bytes would change. Other than the error conditions listed
|
||||
// here, implementations are free to report other errors that arise.
|
||||
//
|
||||
// Calling Span can modify the Transformer state as a side effect. In
|
||||
// effect, it does the transformation just as calling Transform would, only
|
||||
// without copying to a destination buffer and only up to a point it can
|
||||
// determine the input and output bytes are the same. This is obviously more
|
||||
// limited than calling Transform, but can be more efficient in terms of
|
||||
// copying and allocating buffers. Calls to Span and Transform may be
|
||||
// interleaved.
|
||||
Span(src []byte, atEOF bool) (n int, err error)
|
||||
}
|
||||
|
||||
// NopResetter can be embedded by implementations of Transformer to add a nop
|
||||
// Reset method.
|
||||
type NopResetter struct{}
|
||||
|
||||
// Reset implements the Reset method of the Transformer interface.
|
||||
func (NopResetter) Reset() {}
|
||||
|
||||
// Reader wraps another io.Reader by transforming the bytes read.
|
||||
type Reader struct {
|
||||
r io.Reader
|
||||
t Transformer
|
||||
err error
|
||||
|
||||
// dst[dst0:dst1] contains bytes that have been transformed by t but
|
||||
// not yet copied out via Read.
|
||||
dst []byte
|
||||
dst0, dst1 int
|
||||
|
||||
// src[src0:src1] contains bytes that have been read from r but not
|
||||
// yet transformed through t.
|
||||
src []byte
|
||||
src0, src1 int
|
||||
|
||||
// transformComplete is whether the transformation is complete,
|
||||
// regardless of whether or not it was successful.
|
||||
transformComplete bool
|
||||
}
|
||||
|
||||
const defaultBufSize = 4096
|
||||
|
||||
// NewReader returns a new Reader that wraps r by transforming the bytes read
|
||||
// via t. It calls Reset on t.
|
||||
func NewReader(r io.Reader, t Transformer) *Reader {
|
||||
t.Reset()
|
||||
return &Reader{
|
||||
r: r,
|
||||
t: t,
|
||||
dst: make([]byte, defaultBufSize),
|
||||
src: make([]byte, defaultBufSize),
|
||||
}
|
||||
}
|
||||
|
||||
// Read implements the io.Reader interface.
|
||||
func (r *Reader) Read(p []byte) (int, error) {
|
||||
n, err := 0, error(nil)
|
||||
for {
|
||||
// Copy out any transformed bytes and return the final error if we are done.
|
||||
if r.dst0 != r.dst1 {
|
||||
n = copy(p, r.dst[r.dst0:r.dst1])
|
||||
r.dst0 += n
|
||||
if r.dst0 == r.dst1 && r.transformComplete {
|
||||
return n, r.err
|
||||
}
|
||||
return n, nil
|
||||
} else if r.transformComplete {
|
||||
return 0, r.err
|
||||
}
|
||||
|
||||
// Try to transform some source bytes, or to flush the transformer if we
|
||||
// are out of source bytes. We do this even if r.r.Read returned an error.
|
||||
// As the io.Reader documentation says, "process the n > 0 bytes returned
|
||||
// before considering the error".
|
||||
if r.src0 != r.src1 || r.err != nil {
|
||||
r.dst0 = 0
|
||||
r.dst1, n, err = r.t.Transform(r.dst, r.src[r.src0:r.src1], r.err == io.EOF)
|
||||
r.src0 += n
|
||||
|
||||
switch {
|
||||
case err == nil:
|
||||
if r.src0 != r.src1 {
|
||||
r.err = errInconsistentByteCount
|
||||
}
|
||||
// The Transform call was successful; we are complete if we
|
||||
// cannot read more bytes into src.
|
||||
r.transformComplete = r.err != nil
|
||||
continue
|
||||
case err == ErrShortDst && (r.dst1 != 0 || n != 0):
|
||||
// Make room in dst by copying out, and try again.
|
||||
continue
|
||||
case err == ErrShortSrc && r.src1-r.src0 != len(r.src) && r.err == nil:
|
||||
// Read more bytes into src via the code below, and try again.
|
||||
default:
|
||||
r.transformComplete = true
|
||||
// The reader error (r.err) takes precedence over the
|
||||
// transformer error (err) unless r.err is nil or io.EOF.
|
||||
if r.err == nil || r.err == io.EOF {
|
||||
r.err = err
|
||||
}
|
||||
continue
|
||||
}
|
||||
}
|
||||
|
||||
// Move any untransformed source bytes to the start of the buffer
|
||||
// and read more bytes.
|
||||
if r.src0 != 0 {
|
||||
r.src0, r.src1 = 0, copy(r.src, r.src[r.src0:r.src1])
|
||||
}
|
||||
n, r.err = r.r.Read(r.src[r.src1:])
|
||||
r.src1 += n
|
||||
}
|
||||
}
|
||||
|
||||
// TODO: implement ReadByte (and ReadRune??).
|
||||
|
||||
// Writer wraps another io.Writer by transforming the bytes read.
|
||||
// The user needs to call Close to flush unwritten bytes that may
|
||||
// be buffered.
|
||||
type Writer struct {
|
||||
w io.Writer
|
||||
t Transformer
|
||||
dst []byte
|
||||
|
||||
// src[:n] contains bytes that have not yet passed through t.
|
||||
src []byte
|
||||
n int
|
||||
}
|
||||
|
||||
// NewWriter returns a new Writer that wraps w by transforming the bytes written
|
||||
// via t. It calls Reset on t.
|
||||
func NewWriter(w io.Writer, t Transformer) *Writer {
|
||||
t.Reset()
|
||||
return &Writer{
|
||||
w: w,
|
||||
t: t,
|
||||
dst: make([]byte, defaultBufSize),
|
||||
src: make([]byte, defaultBufSize),
|
||||
}
|
||||
}
|
||||
|
||||
// Write implements the io.Writer interface. If there are not enough
|
||||
// bytes available to complete a Transform, the bytes will be buffered
|
||||
// for the next write. Call Close to convert the remaining bytes.
|
||||
func (w *Writer) Write(data []byte) (n int, err error) {
|
||||
src := data
|
||||
if w.n > 0 {
|
||||
// Append bytes from data to the last remainder.
|
||||
// TODO: limit the amount copied on first try.
|
||||
n = copy(w.src[w.n:], data)
|
||||
w.n += n
|
||||
src = w.src[:w.n]
|
||||
}
|
||||
for {
|
||||
nDst, nSrc, err := w.t.Transform(w.dst, src, false)
|
||||
if _, werr := w.w.Write(w.dst[:nDst]); werr != nil {
|
||||
return n, werr
|
||||
}
|
||||
src = src[nSrc:]
|
||||
if w.n == 0 {
|
||||
n += nSrc
|
||||
} else if len(src) <= n {
|
||||
// Enough bytes from w.src have been consumed. We make src point
|
||||
// to data instead to reduce the copying.
|
||||
w.n = 0
|
||||
n -= len(src)
|
||||
src = data[n:]
|
||||
if n < len(data) && (err == nil || err == ErrShortSrc) {
|
||||
continue
|
||||
}
|
||||
}
|
||||
switch err {
|
||||
case ErrShortDst:
|
||||
// This error is okay as long as we are making progress.
|
||||
if nDst > 0 || nSrc > 0 {
|
||||
continue
|
||||
}
|
||||
case ErrShortSrc:
|
||||
if len(src) < len(w.src) {
|
||||
m := copy(w.src, src)
|
||||
// If w.n > 0, bytes from data were already copied to w.src and n
|
||||
// was already set to the number of bytes consumed.
|
||||
if w.n == 0 {
|
||||
n += m
|
||||
}
|
||||
w.n = m
|
||||
err = nil
|
||||
} else if nDst > 0 || nSrc > 0 {
|
||||
// Not enough buffer to store the remainder. Keep processing as
|
||||
// long as there is progress. Without this case, transforms that
|
||||
// require a lookahead larger than the buffer may result in an
|
||||
// error. This is not something one may expect to be common in
|
||||
// practice, but it may occur when buffers are set to small
|
||||
// sizes during testing.
|
||||
continue
|
||||
}
|
||||
case nil:
|
||||
if w.n > 0 {
|
||||
err = errInconsistentByteCount
|
||||
}
|
||||
}
|
||||
return n, err
|
||||
}
|
||||
}
|
||||
|
||||
// Close implements the io.Closer interface.
|
||||
func (w *Writer) Close() error {
|
||||
src := w.src[:w.n]
|
||||
for {
|
||||
nDst, nSrc, err := w.t.Transform(w.dst, src, true)
|
||||
if _, werr := w.w.Write(w.dst[:nDst]); werr != nil {
|
||||
return werr
|
||||
}
|
||||
if err != ErrShortDst {
|
||||
return err
|
||||
}
|
||||
src = src[nSrc:]
|
||||
}
|
||||
}
|
||||
|
||||
type nop struct{ NopResetter }
|
||||
|
||||
func (nop) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
n := copy(dst, src)
|
||||
if n < len(src) {
|
||||
err = ErrShortDst
|
||||
}
|
||||
return n, n, err
|
||||
}
|
||||
|
||||
func (nop) Span(src []byte, atEOF bool) (n int, err error) {
|
||||
return len(src), nil
|
||||
}
|
||||
|
||||
type discard struct{ NopResetter }
|
||||
|
||||
func (discard) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
return 0, len(src), nil
|
||||
}
|
||||
|
||||
var (
|
||||
// Discard is a Transformer for which all Transform calls succeed
|
||||
// by consuming all bytes and writing nothing.
|
||||
Discard Transformer = discard{}
|
||||
|
||||
// Nop is a SpanningTransformer that copies src to dst.
|
||||
Nop SpanningTransformer = nop{}
|
||||
)
|
||||
|
||||
// chain is a sequence of links. A chain with N Transformers has N+1 links and
|
||||
// N+1 buffers. Of those N+1 buffers, the first and last are the src and dst
|
||||
// buffers given to chain.Transform and the middle N-1 buffers are intermediate
|
||||
// buffers owned by the chain. The i'th link transforms bytes from the i'th
|
||||
// buffer chain.link[i].b at read offset chain.link[i].p to the i+1'th buffer
|
||||
// chain.link[i+1].b at write offset chain.link[i+1].n, for i in [0, N).
|
||||
type chain struct {
|
||||
link []link
|
||||
err error
|
||||
// errStart is the index at which the error occurred plus 1. Processing
|
||||
// errStart at this level at the next call to Transform. As long as
|
||||
// errStart > 0, chain will not consume any more source bytes.
|
||||
errStart int
|
||||
}
|
||||
|
||||
func (c *chain) fatalError(errIndex int, err error) {
|
||||
if i := errIndex + 1; i > c.errStart {
|
||||
c.errStart = i
|
||||
c.err = err
|
||||
}
|
||||
}
|
||||
|
||||
type link struct {
|
||||
t Transformer
|
||||
// b[p:n] holds the bytes to be transformed by t.
|
||||
b []byte
|
||||
p int
|
||||
n int
|
||||
}
|
||||
|
||||
func (l *link) src() []byte {
|
||||
return l.b[l.p:l.n]
|
||||
}
|
||||
|
||||
func (l *link) dst() []byte {
|
||||
return l.b[l.n:]
|
||||
}
|
||||
|
||||
// Chain returns a Transformer that applies t in sequence.
|
||||
func Chain(t ...Transformer) Transformer {
|
||||
if len(t) == 0 {
|
||||
return nop{}
|
||||
}
|
||||
c := &chain{link: make([]link, len(t)+1)}
|
||||
for i, tt := range t {
|
||||
c.link[i].t = tt
|
||||
}
|
||||
// Allocate intermediate buffers.
|
||||
b := make([][defaultBufSize]byte, len(t)-1)
|
||||
for i := range b {
|
||||
c.link[i+1].b = b[i][:]
|
||||
}
|
||||
return c
|
||||
}
|
||||
|
||||
// Reset resets the state of Chain. It calls Reset on all the Transformers.
|
||||
func (c *chain) Reset() {
|
||||
for i, l := range c.link {
|
||||
if l.t != nil {
|
||||
l.t.Reset()
|
||||
}
|
||||
c.link[i].p, c.link[i].n = 0, 0
|
||||
}
|
||||
}
|
||||
|
||||
// TODO: make chain use Span (is going to be fun to implement!)
|
||||
|
||||
// Transform applies the transformers of c in sequence.
|
||||
func (c *chain) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
// Set up src and dst in the chain.
|
||||
srcL := &c.link[0]
|
||||
dstL := &c.link[len(c.link)-1]
|
||||
srcL.b, srcL.p, srcL.n = src, 0, len(src)
|
||||
dstL.b, dstL.n = dst, 0
|
||||
var lastFull, needProgress bool // for detecting progress
|
||||
|
||||
// i is the index of the next Transformer to apply, for i in [low, high].
|
||||
// low is the lowest index for which c.link[low] may still produce bytes.
|
||||
// high is the highest index for which c.link[high] has a Transformer.
|
||||
// The error returned by Transform determines whether to increase or
|
||||
// decrease i. We try to completely fill a buffer before converting it.
|
||||
for low, i, high := c.errStart, c.errStart, len(c.link)-2; low <= i && i <= high; {
|
||||
in, out := &c.link[i], &c.link[i+1]
|
||||
nDst, nSrc, err0 := in.t.Transform(out.dst(), in.src(), atEOF && low == i)
|
||||
out.n += nDst
|
||||
in.p += nSrc
|
||||
if i > 0 && in.p == in.n {
|
||||
in.p, in.n = 0, 0
|
||||
}
|
||||
needProgress, lastFull = lastFull, false
|
||||
switch err0 {
|
||||
case ErrShortDst:
|
||||
// Process the destination buffer next. Return if we are already
|
||||
// at the high index.
|
||||
if i == high {
|
||||
return dstL.n, srcL.p, ErrShortDst
|
||||
}
|
||||
if out.n != 0 {
|
||||
i++
|
||||
// If the Transformer at the next index is not able to process any
|
||||
// source bytes there is nothing that can be done to make progress
|
||||
// and the bytes will remain unprocessed. lastFull is used to
|
||||
// detect this and break out of the loop with a fatal error.
|
||||
lastFull = true
|
||||
continue
|
||||
}
|
||||
// The destination buffer was too small, but is completely empty.
|
||||
// Return a fatal error as this transformation can never complete.
|
||||
c.fatalError(i, errShortInternal)
|
||||
case ErrShortSrc:
|
||||
if i == 0 {
|
||||
// Save ErrShortSrc in err. All other errors take precedence.
|
||||
err = ErrShortSrc
|
||||
break
|
||||
}
|
||||
// Source bytes were depleted before filling up the destination buffer.
|
||||
// Verify we made some progress, move the remaining bytes to the errStart
|
||||
// and try to get more source bytes.
|
||||
if needProgress && nSrc == 0 || in.n-in.p == len(in.b) {
|
||||
// There were not enough source bytes to proceed while the source
|
||||
// buffer cannot hold any more bytes. Return a fatal error as this
|
||||
// transformation can never complete.
|
||||
c.fatalError(i, errShortInternal)
|
||||
break
|
||||
}
|
||||
// in.b is an internal buffer and we can make progress.
|
||||
in.p, in.n = 0, copy(in.b, in.src())
|
||||
fallthrough
|
||||
case nil:
|
||||
// if i == low, we have depleted the bytes at index i or any lower levels.
|
||||
// In that case we increase low and i. In all other cases we decrease i to
|
||||
// fetch more bytes before proceeding to the next index.
|
||||
if i > low {
|
||||
i--
|
||||
continue
|
||||
}
|
||||
default:
|
||||
c.fatalError(i, err0)
|
||||
}
|
||||
// Exhausted level low or fatal error: increase low and continue
|
||||
// to process the bytes accepted so far.
|
||||
i++
|
||||
low = i
|
||||
}
|
||||
|
||||
// If c.errStart > 0, this means we found a fatal error. We will clear
|
||||
// all upstream buffers. At this point, no more progress can be made
|
||||
// downstream, as Transform would have bailed while handling ErrShortDst.
|
||||
if c.errStart > 0 {
|
||||
for i := 1; i < c.errStart; i++ {
|
||||
c.link[i].p, c.link[i].n = 0, 0
|
||||
}
|
||||
err, c.errStart, c.err = c.err, 0, nil
|
||||
}
|
||||
return dstL.n, srcL.p, err
|
||||
}
|
||||
|
||||
// Deprecated: use runes.Remove instead.
|
||||
func RemoveFunc(f func(r rune) bool) Transformer {
|
||||
return removeF(f)
|
||||
}
|
||||
|
||||
type removeF func(r rune) bool
|
||||
|
||||
func (removeF) Reset() {}
|
||||
|
||||
// Transform implements the Transformer interface.
|
||||
func (t removeF) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
for r, sz := rune(0), 0; len(src) > 0; src = src[sz:] {
|
||||
|
||||
if r = rune(src[0]); r < utf8.RuneSelf {
|
||||
sz = 1
|
||||
} else {
|
||||
r, sz = utf8.DecodeRune(src)
|
||||
|
||||
if sz == 1 {
|
||||
// Invalid rune.
|
||||
if !atEOF && !utf8.FullRune(src) {
|
||||
err = ErrShortSrc
|
||||
break
|
||||
}
|
||||
// We replace illegal bytes with RuneError. Not doing so might
|
||||
// otherwise turn a sequence of invalid UTF-8 into valid UTF-8.
|
||||
// The resulting byte sequence may subsequently contain runes
|
||||
// for which t(r) is true that were passed unnoticed.
|
||||
if !t(r) {
|
||||
if nDst+3 > len(dst) {
|
||||
err = ErrShortDst
|
||||
break
|
||||
}
|
||||
nDst += copy(dst[nDst:], "\uFFFD")
|
||||
}
|
||||
nSrc++
|
||||
continue
|
||||
}
|
||||
}
|
||||
|
||||
if !t(r) {
|
||||
if nDst+sz > len(dst) {
|
||||
err = ErrShortDst
|
||||
break
|
||||
}
|
||||
nDst += copy(dst[nDst:], src[:sz])
|
||||
}
|
||||
nSrc += sz
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
// grow returns a new []byte that is longer than b, and copies the first n bytes
|
||||
// of b to the start of the new slice.
|
||||
func grow(b []byte, n int) []byte {
|
||||
m := len(b)
|
||||
if m <= 32 {
|
||||
m = 64
|
||||
} else if m <= 256 {
|
||||
m *= 2
|
||||
} else {
|
||||
m += m >> 1
|
||||
}
|
||||
buf := make([]byte, m)
|
||||
copy(buf, b[:n])
|
||||
return buf
|
||||
}
|
||||
|
||||
const initialBufSize = 128
|
||||
|
||||
// String returns a string with the result of converting s[:n] using t, where
|
||||
// n <= len(s). If err == nil, n will be len(s). It calls Reset on t.
|
||||
func String(t Transformer, s string) (result string, n int, err error) {
|
||||
t.Reset()
|
||||
if s == "" {
|
||||
// Fast path for the common case for empty input. Results in about a
|
||||
// 86% reduction of running time for BenchmarkStringLowerEmpty.
|
||||
if _, _, err := t.Transform(nil, nil, true); err == nil {
|
||||
return "", 0, nil
|
||||
}
|
||||
}
|
||||
|
||||
// Allocate only once. Note that both dst and src escape when passed to
|
||||
// Transform.
|
||||
buf := [2 * initialBufSize]byte{}
|
||||
dst := buf[:initialBufSize:initialBufSize]
|
||||
src := buf[initialBufSize : 2*initialBufSize]
|
||||
|
||||
// The input string s is transformed in multiple chunks (starting with a
|
||||
// chunk size of initialBufSize). nDst and nSrc are per-chunk (or
|
||||
// per-Transform-call) indexes, pDst and pSrc are overall indexes.
|
||||
nDst, nSrc := 0, 0
|
||||
pDst, pSrc := 0, 0
|
||||
|
||||
// pPrefix is the length of a common prefix: the first pPrefix bytes of the
|
||||
// result will equal the first pPrefix bytes of s. It is not guaranteed to
|
||||
// be the largest such value, but if pPrefix, len(result) and len(s) are
|
||||
// all equal after the final transform (i.e. calling Transform with atEOF
|
||||
// being true returned nil error) then we don't need to allocate a new
|
||||
// result string.
|
||||
pPrefix := 0
|
||||
for {
|
||||
// Invariant: pDst == pPrefix && pSrc == pPrefix.
|
||||
|
||||
n := copy(src, s[pSrc:])
|
||||
nDst, nSrc, err = t.Transform(dst, src[:n], pSrc+n == len(s))
|
||||
pDst += nDst
|
||||
pSrc += nSrc
|
||||
|
||||
// TODO: let transformers implement an optional Spanner interface, akin
|
||||
// to norm's QuickSpan. This would even allow us to avoid any allocation.
|
||||
if !bytes.Equal(dst[:nDst], src[:nSrc]) {
|
||||
break
|
||||
}
|
||||
pPrefix = pSrc
|
||||
if err == ErrShortDst {
|
||||
// A buffer can only be short if a transformer modifies its input.
|
||||
break
|
||||
} else if err == ErrShortSrc {
|
||||
if nSrc == 0 {
|
||||
// No progress was made.
|
||||
break
|
||||
}
|
||||
// Equal so far and !atEOF, so continue checking.
|
||||
} else if err != nil || pPrefix == len(s) {
|
||||
return string(s[:pPrefix]), pPrefix, err
|
||||
}
|
||||
}
|
||||
// Post-condition: pDst == pPrefix + nDst && pSrc == pPrefix + nSrc.
|
||||
|
||||
// We have transformed the first pSrc bytes of the input s to become pDst
|
||||
// transformed bytes. Those transformed bytes are discontiguous: the first
|
||||
// pPrefix of them equal s[:pPrefix] and the last nDst of them equal
|
||||
// dst[:nDst]. We copy them around, into a new dst buffer if necessary, so
|
||||
// that they become one contiguous slice: dst[:pDst].
|
||||
if pPrefix != 0 {
|
||||
newDst := dst
|
||||
if pDst > len(newDst) {
|
||||
newDst = make([]byte, len(s)+nDst-nSrc)
|
||||
}
|
||||
copy(newDst[pPrefix:pDst], dst[:nDst])
|
||||
copy(newDst[:pPrefix], s[:pPrefix])
|
||||
dst = newDst
|
||||
}
|
||||
|
||||
// Prevent duplicate Transform calls with atEOF being true at the end of
|
||||
// the input. Also return if we have an unrecoverable error.
|
||||
if (err == nil && pSrc == len(s)) ||
|
||||
(err != nil && err != ErrShortDst && err != ErrShortSrc) {
|
||||
return string(dst[:pDst]), pSrc, err
|
||||
}
|
||||
|
||||
// Transform the remaining input, growing dst and src buffers as necessary.
|
||||
for {
|
||||
n := copy(src, s[pSrc:])
|
||||
nDst, nSrc, err := t.Transform(dst[pDst:], src[:n], pSrc+n == len(s))
|
||||
pDst += nDst
|
||||
pSrc += nSrc
|
||||
|
||||
// If we got ErrShortDst or ErrShortSrc, do not grow as long as we can
|
||||
// make progress. This may avoid excessive allocations.
|
||||
if err == ErrShortDst {
|
||||
if nDst == 0 {
|
||||
dst = grow(dst, pDst)
|
||||
}
|
||||
} else if err == ErrShortSrc {
|
||||
if nSrc == 0 {
|
||||
src = grow(src, 0)
|
||||
}
|
||||
} else if err != nil || pSrc == len(s) {
|
||||
return string(dst[:pDst]), pSrc, err
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Bytes returns a new byte slice with the result of converting b[:n] using t,
|
||||
// where n <= len(b). If err == nil, n will be len(b). It calls Reset on t.
|
||||
func Bytes(t Transformer, b []byte) (result []byte, n int, err error) {
|
||||
return doAppend(t, 0, make([]byte, len(b)), b)
|
||||
}
|
||||
|
||||
// Append appends the result of converting src[:n] using t to dst, where
|
||||
// n <= len(src), If err == nil, n will be len(src). It calls Reset on t.
|
||||
func Append(t Transformer, dst, src []byte) (result []byte, n int, err error) {
|
||||
if len(dst) == cap(dst) {
|
||||
n := len(src) + len(dst) // It is okay for this to be 0.
|
||||
b := make([]byte, n)
|
||||
dst = b[:copy(b, dst)]
|
||||
}
|
||||
return doAppend(t, len(dst), dst[:cap(dst)], src)
|
||||
}
|
||||
|
||||
func doAppend(t Transformer, pDst int, dst, src []byte) (result []byte, n int, err error) {
|
||||
t.Reset()
|
||||
pSrc := 0
|
||||
for {
|
||||
nDst, nSrc, err := t.Transform(dst[pDst:], src[pSrc:], true)
|
||||
pDst += nDst
|
||||
pSrc += nSrc
|
||||
if err != ErrShortDst {
|
||||
return dst[:pDst], pSrc, err
|
||||
}
|
||||
|
||||
// Grow the destination buffer, but do not grow as long as we can make
|
||||
// progress. This may avoid excessive allocations.
|
||||
if nDst == 0 {
|
||||
dst = grow(dst, pDst)
|
||||
}
|
||||
}
|
||||
}
|
198
vendor/golang.org/x/text/unicode/bidi/bidi.go
generated
vendored
Normal file
198
vendor/golang.org/x/text/unicode/bidi/bidi.go
generated
vendored
Normal file
|
@ -0,0 +1,198 @@
|
|||
// Copyright 2015 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
//go:generate go run gen.go gen_trieval.go gen_ranges.go
|
||||
|
||||
// Package bidi contains functionality for bidirectional text support.
|
||||
//
|
||||
// See http://www.unicode.org/reports/tr9.
|
||||
//
|
||||
// NOTE: UNDER CONSTRUCTION. This API may change in backwards incompatible ways
|
||||
// and without notice.
|
||||
package bidi // import "golang.org/x/text/unicode/bidi"
|
||||
|
||||
// TODO:
|
||||
// The following functionality would not be hard to implement, but hinges on
|
||||
// the definition of a Segmenter interface. For now this is up to the user.
|
||||
// - Iterate over paragraphs
|
||||
// - Segmenter to iterate over runs directly from a given text.
|
||||
// Also:
|
||||
// - Transformer for reordering?
|
||||
// - Transformer (validator, really) for Bidi Rule.
|
||||
|
||||
// This API tries to avoid dealing with embedding levels for now. Under the hood
|
||||
// these will be computed, but the question is to which extent the user should
|
||||
// know they exist. We should at some point allow the user to specify an
|
||||
// embedding hierarchy, though.
|
||||
|
||||
// A Direction indicates the overall flow of text.
|
||||
type Direction int
|
||||
|
||||
const (
|
||||
// LeftToRight indicates the text contains no right-to-left characters and
|
||||
// that either there are some left-to-right characters or the option
|
||||
// DefaultDirection(LeftToRight) was passed.
|
||||
LeftToRight Direction = iota
|
||||
|
||||
// RightToLeft indicates the text contains no left-to-right characters and
|
||||
// that either there are some right-to-left characters or the option
|
||||
// DefaultDirection(RightToLeft) was passed.
|
||||
RightToLeft
|
||||
|
||||
// Mixed indicates text contains both left-to-right and right-to-left
|
||||
// characters.
|
||||
Mixed
|
||||
|
||||
// Neutral means that text contains no left-to-right and right-to-left
|
||||
// characters and that no default direction has been set.
|
||||
Neutral
|
||||
)
|
||||
|
||||
type options struct{}
|
||||
|
||||
// An Option is an option for Bidi processing.
|
||||
type Option func(*options)
|
||||
|
||||
// ICU allows the user to define embedding levels. This may be used, for example,
|
||||
// to use hierarchical structure of markup languages to define embeddings.
|
||||
// The following option may be a way to expose this functionality in this API.
|
||||
// // LevelFunc sets a function that associates nesting levels with the given text.
|
||||
// // The levels function will be called with monotonically increasing values for p.
|
||||
// func LevelFunc(levels func(p int) int) Option {
|
||||
// panic("unimplemented")
|
||||
// }
|
||||
|
||||
// DefaultDirection sets the default direction for a Paragraph. The direction is
|
||||
// overridden if the text contains directional characters.
|
||||
func DefaultDirection(d Direction) Option {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// A Paragraph holds a single Paragraph for Bidi processing.
|
||||
type Paragraph struct {
|
||||
// buffers
|
||||
}
|
||||
|
||||
// SetBytes configures p for the given paragraph text. It replaces text
|
||||
// previously set by SetBytes or SetString. If b contains a paragraph separator
|
||||
// it will only process the first paragraph and report the number of bytes
|
||||
// consumed from b including this separator. Error may be non-nil if options are
|
||||
// given.
|
||||
func (p *Paragraph) SetBytes(b []byte, opts ...Option) (n int, err error) {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// SetString configures p for the given paragraph text. It replaces text
|
||||
// previously set by SetBytes or SetString. If b contains a paragraph separator
|
||||
// it will only process the first paragraph and report the number of bytes
|
||||
// consumed from b including this separator. Error may be non-nil if options are
|
||||
// given.
|
||||
func (p *Paragraph) SetString(s string, opts ...Option) (n int, err error) {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// IsLeftToRight reports whether the principle direction of rendering for this
|
||||
// paragraphs is left-to-right. If this returns false, the principle direction
|
||||
// of rendering is right-to-left.
|
||||
func (p *Paragraph) IsLeftToRight() bool {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// Direction returns the direction of the text of this paragraph.
|
||||
//
|
||||
// The direction may be LeftToRight, RightToLeft, Mixed, or Neutral.
|
||||
func (p *Paragraph) Direction() Direction {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// RunAt reports the Run at the given position of the input text.
|
||||
//
|
||||
// This method can be used for computing line breaks on paragraphs.
|
||||
func (p *Paragraph) RunAt(pos int) Run {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// Order computes the visual ordering of all the runs in a Paragraph.
|
||||
func (p *Paragraph) Order() (Ordering, error) {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// Line computes the visual ordering of runs for a single line starting and
|
||||
// ending at the given positions in the original text.
|
||||
func (p *Paragraph) Line(start, end int) (Ordering, error) {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// An Ordering holds the computed visual order of runs of a Paragraph. Calling
|
||||
// SetBytes or SetString on the originating Paragraph invalidates an Ordering.
|
||||
// The methods of an Ordering should only be called by one goroutine at a time.
|
||||
type Ordering struct{}
|
||||
|
||||
// Direction reports the directionality of the runs.
|
||||
//
|
||||
// The direction may be LeftToRight, RightToLeft, Mixed, or Neutral.
|
||||
func (o *Ordering) Direction() Direction {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// NumRuns returns the number of runs.
|
||||
func (o *Ordering) NumRuns() int {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// Run returns the ith run within the ordering.
|
||||
func (o *Ordering) Run(i int) Run {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// TODO: perhaps with options.
|
||||
// // Reorder creates a reader that reads the runes in visual order per character.
|
||||
// // Modifiers remain after the runes they modify.
|
||||
// func (l *Runs) Reorder() io.Reader {
|
||||
// panic("unimplemented")
|
||||
// }
|
||||
|
||||
// A Run is a continuous sequence of characters of a single direction.
|
||||
type Run struct {
|
||||
}
|
||||
|
||||
// String returns the text of the run in its original order.
|
||||
func (r *Run) String() string {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// Bytes returns the text of the run in its original order.
|
||||
func (r *Run) Bytes() []byte {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// TODO: methods for
|
||||
// - Display order
|
||||
// - headers and footers
|
||||
// - bracket replacement.
|
||||
|
||||
// Direction reports the direction of the run.
|
||||
func (r *Run) Direction() Direction {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// Position of the Run within the text passed to SetBytes or SetString of the
|
||||
// originating Paragraph value.
|
||||
func (r *Run) Pos() (start, end int) {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// AppendReverse reverses the order of characters of in, appends them to out,
|
||||
// and returns the result. Modifiers will still follow the runes they modify.
|
||||
// Brackets are replaced with their counterparts.
|
||||
func AppendReverse(out, in []byte) []byte {
|
||||
panic("unimplemented")
|
||||
}
|
||||
|
||||
// ReverseString reverses the order of characters in s and returns a new string.
|
||||
// Modifiers will still follow the runes they modify. Brackets are replaced with
|
||||
// their counterparts.
|
||||
func ReverseString(s string) string {
|
||||
panic("unimplemented")
|
||||
}
|
335
vendor/golang.org/x/text/unicode/bidi/bracket.go
generated
vendored
Normal file
335
vendor/golang.org/x/text/unicode/bidi/bracket.go
generated
vendored
Normal file
|
@ -0,0 +1,335 @@
|
|||
// Copyright 2015 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package bidi
|
||||
|
||||
import (
|
||||
"container/list"
|
||||
"fmt"
|
||||
"sort"
|
||||
)
|
||||
|
||||
// This file contains a port of the reference implementation of the
|
||||
// Bidi Parentheses Algorithm:
|
||||
// http://www.unicode.org/Public/PROGRAMS/BidiReferenceJava/BidiPBAReference.java
|
||||
//
|
||||
// The implementation in this file covers definitions BD14-BD16 and rule N0
|
||||
// of UAX#9.
|
||||
//
|
||||
// Some preprocessing is done for each rune before data is passed to this
|
||||
// algorithm:
|
||||
// - opening and closing brackets are identified
|
||||
// - a bracket pair type, like '(' and ')' is assigned a unique identifier that
|
||||
// is identical for the opening and closing bracket. It is left to do these
|
||||
// mappings.
|
||||
// - The BPA algorithm requires that bracket characters that are canonical
|
||||
// equivalents of each other be able to be substituted for each other.
|
||||
// It is the responsibility of the caller to do this canonicalization.
|
||||
//
|
||||
// In implementing BD16, this implementation departs slightly from the "logical"
|
||||
// algorithm defined in UAX#9. In particular, the stack referenced there
|
||||
// supports operations that go beyond a "basic" stack. An equivalent
|
||||
// implementation based on a linked list is used here.
|
||||
|
||||
// Bidi_Paired_Bracket_Type
|
||||
// BD14. An opening paired bracket is a character whose
|
||||
// Bidi_Paired_Bracket_Type property value is Open.
|
||||
//
|
||||
// BD15. A closing paired bracket is a character whose
|
||||
// Bidi_Paired_Bracket_Type property value is Close.
|
||||
type bracketType byte
|
||||
|
||||
const (
|
||||
bpNone bracketType = iota
|
||||
bpOpen
|
||||
bpClose
|
||||
)
|
||||
|
||||
// bracketPair holds a pair of index values for opening and closing bracket
|
||||
// location of a bracket pair.
|
||||
type bracketPair struct {
|
||||
opener int
|
||||
closer int
|
||||
}
|
||||
|
||||
func (b *bracketPair) String() string {
|
||||
return fmt.Sprintf("(%v, %v)", b.opener, b.closer)
|
||||
}
|
||||
|
||||
// bracketPairs is a slice of bracketPairs with a sort.Interface implementation.
|
||||
type bracketPairs []bracketPair
|
||||
|
||||
func (b bracketPairs) Len() int { return len(b) }
|
||||
func (b bracketPairs) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
|
||||
func (b bracketPairs) Less(i, j int) bool { return b[i].opener < b[j].opener }
|
||||
|
||||
// resolvePairedBrackets runs the paired bracket part of the UBA algorithm.
|
||||
//
|
||||
// For each rune, it takes the indexes into the original string, the class the
|
||||
// bracket type (in pairTypes) and the bracket identifier (pairValues). It also
|
||||
// takes the direction type for the start-of-sentence and the embedding level.
|
||||
//
|
||||
// The identifiers for bracket types are the rune of the canonicalized opening
|
||||
// bracket for brackets (open or close) or 0 for runes that are not brackets.
|
||||
func resolvePairedBrackets(s *isolatingRunSequence) {
|
||||
p := bracketPairer{
|
||||
sos: s.sos,
|
||||
openers: list.New(),
|
||||
codesIsolatedRun: s.types,
|
||||
indexes: s.indexes,
|
||||
}
|
||||
dirEmbed := L
|
||||
if s.level&1 != 0 {
|
||||
dirEmbed = R
|
||||
}
|
||||
p.locateBrackets(s.p.pairTypes, s.p.pairValues)
|
||||
p.resolveBrackets(dirEmbed, s.p.initialTypes)
|
||||
}
|
||||
|
||||
type bracketPairer struct {
|
||||
sos Class // direction corresponding to start of sequence
|
||||
|
||||
// The following is a restatement of BD 16 using non-algorithmic language.
|
||||
//
|
||||
// A bracket pair is a pair of characters consisting of an opening
|
||||
// paired bracket and a closing paired bracket such that the
|
||||
// Bidi_Paired_Bracket property value of the former equals the latter,
|
||||
// subject to the following constraints.
|
||||
// - both characters of a pair occur in the same isolating run sequence
|
||||
// - the closing character of a pair follows the opening character
|
||||
// - any bracket character can belong at most to one pair, the earliest possible one
|
||||
// - any bracket character not part of a pair is treated like an ordinary character
|
||||
// - pairs may nest properly, but their spans may not overlap otherwise
|
||||
|
||||
// Bracket characters with canonical decompositions are supposed to be
|
||||
// treated as if they had been normalized, to allow normalized and non-
|
||||
// normalized text to give the same result. In this implementation that step
|
||||
// is pushed out to the caller. The caller has to ensure that the pairValue
|
||||
// slices contain the rune of the opening bracket after normalization for
|
||||
// any opening or closing bracket.
|
||||
|
||||
openers *list.List // list of positions for opening brackets
|
||||
|
||||
// bracket pair positions sorted by location of opening bracket
|
||||
pairPositions bracketPairs
|
||||
|
||||
codesIsolatedRun []Class // directional bidi codes for an isolated run
|
||||
indexes []int // array of index values into the original string
|
||||
|
||||
}
|
||||
|
||||
// matchOpener reports whether characters at given positions form a matching
|
||||
// bracket pair.
|
||||
func (p *bracketPairer) matchOpener(pairValues []rune, opener, closer int) bool {
|
||||
return pairValues[p.indexes[opener]] == pairValues[p.indexes[closer]]
|
||||
}
|
||||
|
||||
const maxPairingDepth = 63
|
||||
|
||||
// locateBrackets locates matching bracket pairs according to BD16.
|
||||
//
|
||||
// This implementation uses a linked list instead of a stack, because, while
|
||||
// elements are added at the front (like a push) they are not generally removed
|
||||
// in atomic 'pop' operations, reducing the benefit of the stack archetype.
|
||||
func (p *bracketPairer) locateBrackets(pairTypes []bracketType, pairValues []rune) {
|
||||
// traverse the run
|
||||
// do that explicitly (not in a for-each) so we can record position
|
||||
for i, index := range p.indexes {
|
||||
|
||||
// look at the bracket type for each character
|
||||
if pairTypes[index] == bpNone || p.codesIsolatedRun[i] != ON {
|
||||
// continue scanning
|
||||
continue
|
||||
}
|
||||
switch pairTypes[index] {
|
||||
case bpOpen:
|
||||
// check if maximum pairing depth reached
|
||||
if p.openers.Len() == maxPairingDepth {
|
||||
p.openers.Init()
|
||||
return
|
||||
}
|
||||
// remember opener location, most recent first
|
||||
p.openers.PushFront(i)
|
||||
|
||||
case bpClose:
|
||||
// see if there is a match
|
||||
count := 0
|
||||
for elem := p.openers.Front(); elem != nil; elem = elem.Next() {
|
||||
count++
|
||||
opener := elem.Value.(int)
|
||||
if p.matchOpener(pairValues, opener, i) {
|
||||
// if the opener matches, add nested pair to the ordered list
|
||||
p.pairPositions = append(p.pairPositions, bracketPair{opener, i})
|
||||
// remove up to and including matched opener
|
||||
for ; count > 0; count-- {
|
||||
p.openers.Remove(p.openers.Front())
|
||||
}
|
||||
break
|
||||
}
|
||||
}
|
||||
sort.Sort(p.pairPositions)
|
||||
// if we get here, the closing bracket matched no openers
|
||||
// and gets ignored
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Bracket pairs within an isolating run sequence are processed as units so
|
||||
// that both the opening and the closing paired bracket in a pair resolve to
|
||||
// the same direction.
|
||||
//
|
||||
// N0. Process bracket pairs in an isolating run sequence sequentially in
|
||||
// the logical order of the text positions of the opening paired brackets
|
||||
// using the logic given below. Within this scope, bidirectional types EN
|
||||
// and AN are treated as R.
|
||||
//
|
||||
// Identify the bracket pairs in the current isolating run sequence
|
||||
// according to BD16. For each bracket-pair element in the list of pairs of
|
||||
// text positions:
|
||||
//
|
||||
// a Inspect the bidirectional types of the characters enclosed within the
|
||||
// bracket pair.
|
||||
//
|
||||
// b If any strong type (either L or R) matching the embedding direction is
|
||||
// found, set the type for both brackets in the pair to match the embedding
|
||||
// direction.
|
||||
//
|
||||
// o [ e ] o -> o e e e o
|
||||
//
|
||||
// o [ o e ] -> o e o e e
|
||||
//
|
||||
// o [ NI e ] -> o e NI e e
|
||||
//
|
||||
// c Otherwise, if a strong type (opposite the embedding direction) is
|
||||
// found, test for adjacent strong types as follows: 1 First, check
|
||||
// backwards before the opening paired bracket until the first strong type
|
||||
// (L, R, or sos) is found. If that first preceding strong type is opposite
|
||||
// the embedding direction, then set the type for both brackets in the pair
|
||||
// to that type. 2 Otherwise, set the type for both brackets in the pair to
|
||||
// the embedding direction.
|
||||
//
|
||||
// o [ o ] e -> o o o o e
|
||||
//
|
||||
// o [ o NI ] o -> o o o NI o o
|
||||
//
|
||||
// e [ o ] o -> e e o e o
|
||||
//
|
||||
// e [ o ] e -> e e o e e
|
||||
//
|
||||
// e ( o [ o ] NI ) e -> e e o o o o NI e e
|
||||
//
|
||||
// d Otherwise, do not set the type for the current bracket pair. Note that
|
||||
// if the enclosed text contains no strong types the paired brackets will
|
||||
// both resolve to the same level when resolved individually using rules N1
|
||||
// and N2.
|
||||
//
|
||||
// e ( NI ) o -> e ( NI ) o
|
||||
|
||||
// getStrongTypeN0 maps character's directional code to strong type as required
|
||||
// by rule N0.
|
||||
//
|
||||
// TODO: have separate type for "strong" directionality.
|
||||
func (p *bracketPairer) getStrongTypeN0(index int) Class {
|
||||
switch p.codesIsolatedRun[index] {
|
||||
// in the scope of N0, number types are treated as R
|
||||
case EN, AN, AL, R:
|
||||
return R
|
||||
case L:
|
||||
return L
|
||||
default:
|
||||
return ON
|
||||
}
|
||||
}
|
||||
|
||||
// classifyPairContent reports the strong types contained inside a Bracket Pair,
|
||||
// assuming the given embedding direction.
|
||||
//
|
||||
// It returns ON if no strong type is found. If a single strong type is found,
|
||||
// it returns this this type. Otherwise it returns the embedding direction.
|
||||
//
|
||||
// TODO: use separate type for "strong" directionality.
|
||||
func (p *bracketPairer) classifyPairContent(loc bracketPair, dirEmbed Class) Class {
|
||||
dirOpposite := ON
|
||||
for i := loc.opener + 1; i < loc.closer; i++ {
|
||||
dir := p.getStrongTypeN0(i)
|
||||
if dir == ON {
|
||||
continue
|
||||
}
|
||||
if dir == dirEmbed {
|
||||
return dir // type matching embedding direction found
|
||||
}
|
||||
dirOpposite = dir
|
||||
}
|
||||
// return ON if no strong type found, or class opposite to dirEmbed
|
||||
return dirOpposite
|
||||
}
|
||||
|
||||
// classBeforePair determines which strong types are present before a Bracket
|
||||
// Pair. Return R or L if strong type found, otherwise ON.
|
||||
func (p *bracketPairer) classBeforePair(loc bracketPair) Class {
|
||||
for i := loc.opener - 1; i >= 0; i-- {
|
||||
if dir := p.getStrongTypeN0(i); dir != ON {
|
||||
return dir
|
||||
}
|
||||
}
|
||||
// no strong types found, return sos
|
||||
return p.sos
|
||||
}
|
||||
|
||||
// assignBracketType implements rule N0 for a single bracket pair.
|
||||
func (p *bracketPairer) assignBracketType(loc bracketPair, dirEmbed Class, initialTypes []Class) {
|
||||
// rule "N0, a", inspect contents of pair
|
||||
dirPair := p.classifyPairContent(loc, dirEmbed)
|
||||
|
||||
// dirPair is now L, R, or N (no strong type found)
|
||||
|
||||
// the following logical tests are performed out of order compared to
|
||||
// the statement of the rules but yield the same results
|
||||
if dirPair == ON {
|
||||
return // case "d" - nothing to do
|
||||
}
|
||||
|
||||
if dirPair != dirEmbed {
|
||||
// case "c": strong type found, opposite - check before (c.1)
|
||||
dirPair = p.classBeforePair(loc)
|
||||
if dirPair == dirEmbed || dirPair == ON {
|
||||
// no strong opposite type found before - use embedding (c.2)
|
||||
dirPair = dirEmbed
|
||||
}
|
||||
}
|
||||
// else: case "b", strong type found matching embedding,
|
||||
// no explicit action needed, as dirPair is already set to embedding
|
||||
// direction
|
||||
|
||||
// set the bracket types to the type found
|
||||
p.setBracketsToType(loc, dirPair, initialTypes)
|
||||
}
|
||||
|
||||
func (p *bracketPairer) setBracketsToType(loc bracketPair, dirPair Class, initialTypes []Class) {
|
||||
p.codesIsolatedRun[loc.opener] = dirPair
|
||||
p.codesIsolatedRun[loc.closer] = dirPair
|
||||
|
||||
for i := loc.opener + 1; i < loc.closer; i++ {
|
||||
index := p.indexes[i]
|
||||
if initialTypes[index] != NSM {
|
||||
break
|
||||
}
|
||||
p.codesIsolatedRun[i] = dirPair
|
||||
}
|
||||
|
||||
for i := loc.closer + 1; i < len(p.indexes); i++ {
|
||||
index := p.indexes[i]
|
||||
if initialTypes[index] != NSM {
|
||||
break
|
||||
}
|
||||
p.codesIsolatedRun[i] = dirPair
|
||||
}
|
||||
}
|
||||
|
||||
// resolveBrackets implements rule N0 for a list of pairs.
|
||||
func (p *bracketPairer) resolveBrackets(dirEmbed Class, initialTypes []Class) {
|
||||
for _, loc := range p.pairPositions {
|
||||
p.assignBracketType(loc, dirEmbed, initialTypes)
|
||||
}
|
||||
}
|
1058
vendor/golang.org/x/text/unicode/bidi/core.go
generated
vendored
Normal file
1058
vendor/golang.org/x/text/unicode/bidi/core.go
generated
vendored
Normal file
File diff suppressed because it is too large
Load diff
133
vendor/golang.org/x/text/unicode/bidi/gen.go
generated
vendored
Normal file
133
vendor/golang.org/x/text/unicode/bidi/gen.go
generated
vendored
Normal file
|
@ -0,0 +1,133 @@
|
|||
// Copyright 2015 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build ignore
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"flag"
|
||||
"log"
|
||||
|
||||
"golang.org/x/text/internal/gen"
|
||||
"golang.org/x/text/internal/triegen"
|
||||
"golang.org/x/text/internal/ucd"
|
||||
)
|
||||
|
||||
var outputFile = flag.String("out", "tables.go", "output file")
|
||||
|
||||
func main() {
|
||||
gen.Init()
|
||||
gen.Repackage("gen_trieval.go", "trieval.go", "bidi")
|
||||
gen.Repackage("gen_ranges.go", "ranges_test.go", "bidi")
|
||||
|
||||
genTables()
|
||||
}
|
||||
|
||||
// bidiClass names and codes taken from class "bc" in
|
||||
// http://www.unicode.org/Public/8.0.0/ucd/PropertyValueAliases.txt
|
||||
var bidiClass = map[string]Class{
|
||||
"AL": AL, // ArabicLetter
|
||||
"AN": AN, // ArabicNumber
|
||||
"B": B, // ParagraphSeparator
|
||||
"BN": BN, // BoundaryNeutral
|
||||
"CS": CS, // CommonSeparator
|
||||
"EN": EN, // EuropeanNumber
|
||||
"ES": ES, // EuropeanSeparator
|
||||
"ET": ET, // EuropeanTerminator
|
||||
"L": L, // LeftToRight
|
||||
"NSM": NSM, // NonspacingMark
|
||||
"ON": ON, // OtherNeutral
|
||||
"R": R, // RightToLeft
|
||||
"S": S, // SegmentSeparator
|
||||
"WS": WS, // WhiteSpace
|
||||
|
||||
"FSI": Control,
|
||||
"PDF": Control,
|
||||
"PDI": Control,
|
||||
"LRE": Control,
|
||||
"LRI": Control,
|
||||
"LRO": Control,
|
||||
"RLE": Control,
|
||||
"RLI": Control,
|
||||
"RLO": Control,
|
||||
}
|
||||
|
||||
func genTables() {
|
||||
if numClass > 0x0F {
|
||||
log.Fatalf("Too many Class constants (%#x > 0x0F).", numClass)
|
||||
}
|
||||
w := gen.NewCodeWriter()
|
||||
defer w.WriteGoFile(*outputFile, "bidi")
|
||||
|
||||
gen.WriteUnicodeVersion(w)
|
||||
|
||||
t := triegen.NewTrie("bidi")
|
||||
|
||||
// Build data about bracket mapping. These bits need to be or-ed with
|
||||
// any other bits.
|
||||
orMask := map[rune]uint64{}
|
||||
|
||||
xorMap := map[rune]int{}
|
||||
xorMasks := []rune{0} // First value is no-op.
|
||||
|
||||
ucd.Parse(gen.OpenUCDFile("BidiBrackets.txt"), func(p *ucd.Parser) {
|
||||
r1 := p.Rune(0)
|
||||
r2 := p.Rune(1)
|
||||
xor := r1 ^ r2
|
||||
if _, ok := xorMap[xor]; !ok {
|
||||
xorMap[xor] = len(xorMasks)
|
||||
xorMasks = append(xorMasks, xor)
|
||||
}
|
||||
entry := uint64(xorMap[xor]) << xorMaskShift
|
||||
switch p.String(2) {
|
||||
case "o":
|
||||
entry |= openMask
|
||||
case "c", "n":
|
||||
default:
|
||||
log.Fatalf("Unknown bracket class %q.", p.String(2))
|
||||
}
|
||||
orMask[r1] = entry
|
||||
})
|
||||
|
||||
w.WriteComment(`
|
||||
xorMasks contains masks to be xor-ed with brackets to get the reverse
|
||||
version.`)
|
||||
w.WriteVar("xorMasks", xorMasks)
|
||||
|
||||
done := map[rune]bool{}
|
||||
|
||||
insert := func(r rune, c Class) {
|
||||
if !done[r] {
|
||||
t.Insert(r, orMask[r]|uint64(c))
|
||||
done[r] = true
|
||||
}
|
||||
}
|
||||
|
||||
// Insert the derived BiDi properties.
|
||||
ucd.Parse(gen.OpenUCDFile("extracted/DerivedBidiClass.txt"), func(p *ucd.Parser) {
|
||||
r := p.Rune(0)
|
||||
class, ok := bidiClass[p.String(1)]
|
||||
if !ok {
|
||||
log.Fatalf("%U: Unknown BiDi class %q", r, p.String(1))
|
||||
}
|
||||
insert(r, class)
|
||||
})
|
||||
visitDefaults(insert)
|
||||
|
||||
// TODO: use sparse blocks. This would reduce table size considerably
|
||||
// from the looks of it.
|
||||
|
||||
sz, err := t.Gen(w)
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
w.Size += sz
|
||||
}
|
||||
|
||||
// dummy values to make methods in gen_common compile. The real versions
|
||||
// will be generated by this file to tables.go.
|
||||
var (
|
||||
xorMasks []rune
|
||||
)
|
57
vendor/golang.org/x/text/unicode/bidi/gen_ranges.go
generated
vendored
Normal file
57
vendor/golang.org/x/text/unicode/bidi/gen_ranges.go
generated
vendored
Normal file
|
@ -0,0 +1,57 @@
|
|||
// Copyright 2015 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build ignore
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"unicode"
|
||||
|
||||
"golang.org/x/text/internal/gen"
|
||||
"golang.org/x/text/internal/ucd"
|
||||
"golang.org/x/text/unicode/rangetable"
|
||||
)
|
||||
|
||||
// These tables are hand-extracted from:
|
||||
// http://www.unicode.org/Public/8.0.0/ucd/extracted/DerivedBidiClass.txt
|
||||
func visitDefaults(fn func(r rune, c Class)) {
|
||||
// first write default values for ranges listed above.
|
||||
visitRunes(fn, AL, []rune{
|
||||
0x0600, 0x07BF, // Arabic
|
||||
0x08A0, 0x08FF, // Arabic Extended-A
|
||||
0xFB50, 0xFDCF, // Arabic Presentation Forms
|
||||
0xFDF0, 0xFDFF,
|
||||
0xFE70, 0xFEFF,
|
||||
0x0001EE00, 0x0001EEFF, // Arabic Mathematical Alpha Symbols
|
||||
})
|
||||
visitRunes(fn, R, []rune{
|
||||
0x0590, 0x05FF, // Hebrew
|
||||
0x07C0, 0x089F, // Nko et al.
|
||||
0xFB1D, 0xFB4F,
|
||||
0x00010800, 0x00010FFF, // Cypriot Syllabary et. al.
|
||||
0x0001E800, 0x0001EDFF,
|
||||
0x0001EF00, 0x0001EFFF,
|
||||
})
|
||||
visitRunes(fn, ET, []rune{ // European Terminator
|
||||
0x20A0, 0x20Cf, // Currency symbols
|
||||
})
|
||||
rangetable.Visit(unicode.Noncharacter_Code_Point, func(r rune) {
|
||||
fn(r, BN) // Boundary Neutral
|
||||
})
|
||||
ucd.Parse(gen.OpenUCDFile("DerivedCoreProperties.txt"), func(p *ucd.Parser) {
|
||||
if p.String(1) == "Default_Ignorable_Code_Point" {
|
||||
fn(p.Rune(0), BN) // Boundary Neutral
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
func visitRunes(fn func(r rune, c Class), c Class, runes []rune) {
|
||||
for i := 0; i < len(runes); i += 2 {
|
||||
lo, hi := runes[i], runes[i+1]
|
||||
for j := lo; j <= hi; j++ {
|
||||
fn(j, c)
|
||||
}
|
||||
}
|
||||
}
|
64
vendor/golang.org/x/text/unicode/bidi/gen_trieval.go
generated
vendored
Normal file
64
vendor/golang.org/x/text/unicode/bidi/gen_trieval.go
generated
vendored
Normal file
|
@ -0,0 +1,64 @@
|
|||
// Copyright 2015 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build ignore
|
||||
|
||||
package main
|
||||
|
||||
// Class is the Unicode BiDi class. Each rune has a single class.
|
||||
type Class uint
|
||||
|
||||
const (
|
||||
L Class = iota // LeftToRight
|
||||
R // RightToLeft
|
||||
EN // EuropeanNumber
|
||||
ES // EuropeanSeparator
|
||||
ET // EuropeanTerminator
|
||||
AN // ArabicNumber
|
||||
CS // CommonSeparator
|
||||
B // ParagraphSeparator
|
||||
S // SegmentSeparator
|
||||
WS // WhiteSpace
|
||||
ON // OtherNeutral
|
||||
BN // BoundaryNeutral
|
||||
NSM // NonspacingMark
|
||||
AL // ArabicLetter
|
||||
Control // Control LRO - PDI
|
||||
|
||||
numClass
|
||||
|
||||
LRO // LeftToRightOverride
|
||||
RLO // RightToLeftOverride
|
||||
LRE // LeftToRightEmbedding
|
||||
RLE // RightToLeftEmbedding
|
||||
PDF // PopDirectionalFormat
|
||||
LRI // LeftToRightIsolate
|
||||
RLI // RightToLeftIsolate
|
||||
FSI // FirstStrongIsolate
|
||||
PDI // PopDirectionalIsolate
|
||||
|
||||
unknownClass = ^Class(0)
|
||||
)
|
||||
|
||||
var controlToClass = map[rune]Class{
|
||||
0x202D: LRO, // LeftToRightOverride,
|
||||
0x202E: RLO, // RightToLeftOverride,
|
||||
0x202A: LRE, // LeftToRightEmbedding,
|
||||
0x202B: RLE, // RightToLeftEmbedding,
|
||||
0x202C: PDF, // PopDirectionalFormat,
|
||||
0x2066: LRI, // LeftToRightIsolate,
|
||||
0x2067: RLI, // RightToLeftIsolate,
|
||||
0x2068: FSI, // FirstStrongIsolate,
|
||||
0x2069: PDI, // PopDirectionalIsolate,
|
||||
}
|
||||
|
||||
// A trie entry has the following bits:
|
||||
// 7..5 XOR mask for brackets
|
||||
// 4 1: Bracket open, 0: Bracket close
|
||||
// 3..0 Class type
|
||||
|
||||
const (
|
||||
openMask = 0x10
|
||||
xorMaskShift = 5
|
||||
)
|
206
vendor/golang.org/x/text/unicode/bidi/prop.go
generated
vendored
Normal file
206
vendor/golang.org/x/text/unicode/bidi/prop.go
generated
vendored
Normal file
|
@ -0,0 +1,206 @@
|
|||
// Copyright 2016 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package bidi
|
||||
|
||||
import "unicode/utf8"
|
||||
|
||||
// Properties provides access to BiDi properties of runes.
|
||||
type Properties struct {
|
||||
entry uint8
|
||||
last uint8
|
||||
}
|
||||
|
||||
var trie = newBidiTrie(0)
|
||||
|
||||
// TODO: using this for bidirule reduces the running time by about 5%. Consider
|
||||
// if this is worth exposing or if we can find a way to speed up the Class
|
||||
// method.
|
||||
//
|
||||
// // CompactClass is like Class, but maps all of the BiDi control classes
|
||||
// // (LRO, RLO, LRE, RLE, PDF, LRI, RLI, FSI, PDI) to the class Control.
|
||||
// func (p Properties) CompactClass() Class {
|
||||
// return Class(p.entry & 0x0F)
|
||||
// }
|
||||
|
||||
// Class returns the Bidi class for p.
|
||||
func (p Properties) Class() Class {
|
||||
c := Class(p.entry & 0x0F)
|
||||
if c == Control {
|
||||
c = controlByteToClass[p.last&0xF]
|
||||
}
|
||||
return c
|
||||
}
|
||||
|
||||
// IsBracket reports whether the rune is a bracket.
|
||||
func (p Properties) IsBracket() bool { return p.entry&0xF0 != 0 }
|
||||
|
||||
// IsOpeningBracket reports whether the rune is an opening bracket.
|
||||
// IsBracket must return true.
|
||||
func (p Properties) IsOpeningBracket() bool { return p.entry&openMask != 0 }
|
||||
|
||||
// TODO: find a better API and expose.
|
||||
func (p Properties) reverseBracket(r rune) rune {
|
||||
return xorMasks[p.entry>>xorMaskShift] ^ r
|
||||
}
|
||||
|
||||
var controlByteToClass = [16]Class{
|
||||
0xD: LRO, // U+202D LeftToRightOverride,
|
||||
0xE: RLO, // U+202E RightToLeftOverride,
|
||||
0xA: LRE, // U+202A LeftToRightEmbedding,
|
||||
0xB: RLE, // U+202B RightToLeftEmbedding,
|
||||
0xC: PDF, // U+202C PopDirectionalFormat,
|
||||
0x6: LRI, // U+2066 LeftToRightIsolate,
|
||||
0x7: RLI, // U+2067 RightToLeftIsolate,
|
||||
0x8: FSI, // U+2068 FirstStrongIsolate,
|
||||
0x9: PDI, // U+2069 PopDirectionalIsolate,
|
||||
}
|
||||
|
||||
// LookupRune returns properties for r.
|
||||
func LookupRune(r rune) (p Properties, size int) {
|
||||
var buf [4]byte
|
||||
n := utf8.EncodeRune(buf[:], r)
|
||||
return Lookup(buf[:n])
|
||||
}
|
||||
|
||||
// TODO: these lookup methods are based on the generated trie code. The returned
|
||||
// sizes have slightly different semantics from the generated code, in that it
|
||||
// always returns size==1 for an illegal UTF-8 byte (instead of the length
|
||||
// of the maximum invalid subsequence). Most Transformers, like unicode/norm,
|
||||
// leave invalid UTF-8 untouched, in which case it has performance benefits to
|
||||
// do so (without changing the semantics). Bidi requires the semantics used here
|
||||
// for the bidirule implementation to be compatible with the Go semantics.
|
||||
// They ultimately should perhaps be adopted by all trie implementations, for
|
||||
// convenience sake.
|
||||
// This unrolled code also boosts performance of the secure/bidirule package by
|
||||
// about 30%.
|
||||
// So, to remove this code:
|
||||
// - add option to trie generator to define return type.
|
||||
// - always return 1 byte size for ill-formed UTF-8 runes.
|
||||
|
||||
// Lookup returns properties for the first rune in s and the width in bytes of
|
||||
// its encoding. The size will be 0 if s does not hold enough bytes to complete
|
||||
// the encoding.
|
||||
func Lookup(s []byte) (p Properties, sz int) {
|
||||
c0 := s[0]
|
||||
switch {
|
||||
case c0 < 0x80: // is ASCII
|
||||
return Properties{entry: bidiValues[c0]}, 1
|
||||
case c0 < 0xC2:
|
||||
return Properties{}, 1
|
||||
case c0 < 0xE0: // 2-byte UTF-8
|
||||
if len(s) < 2 {
|
||||
return Properties{}, 0
|
||||
}
|
||||
i := bidiIndex[c0]
|
||||
c1 := s[1]
|
||||
if c1 < 0x80 || 0xC0 <= c1 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
return Properties{entry: trie.lookupValue(uint32(i), c1)}, 2
|
||||
case c0 < 0xF0: // 3-byte UTF-8
|
||||
if len(s) < 3 {
|
||||
return Properties{}, 0
|
||||
}
|
||||
i := bidiIndex[c0]
|
||||
c1 := s[1]
|
||||
if c1 < 0x80 || 0xC0 <= c1 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
o := uint32(i)<<6 + uint32(c1)
|
||||
i = bidiIndex[o]
|
||||
c2 := s[2]
|
||||
if c2 < 0x80 || 0xC0 <= c2 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
return Properties{entry: trie.lookupValue(uint32(i), c2), last: c2}, 3
|
||||
case c0 < 0xF8: // 4-byte UTF-8
|
||||
if len(s) < 4 {
|
||||
return Properties{}, 0
|
||||
}
|
||||
i := bidiIndex[c0]
|
||||
c1 := s[1]
|
||||
if c1 < 0x80 || 0xC0 <= c1 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
o := uint32(i)<<6 + uint32(c1)
|
||||
i = bidiIndex[o]
|
||||
c2 := s[2]
|
||||
if c2 < 0x80 || 0xC0 <= c2 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
o = uint32(i)<<6 + uint32(c2)
|
||||
i = bidiIndex[o]
|
||||
c3 := s[3]
|
||||
if c3 < 0x80 || 0xC0 <= c3 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
return Properties{entry: trie.lookupValue(uint32(i), c3)}, 4
|
||||
}
|
||||
// Illegal rune
|
||||
return Properties{}, 1
|
||||
}
|
||||
|
||||
// LookupString returns properties for the first rune in s and the width in
|
||||
// bytes of its encoding. The size will be 0 if s does not hold enough bytes to
|
||||
// complete the encoding.
|
||||
func LookupString(s string) (p Properties, sz int) {
|
||||
c0 := s[0]
|
||||
switch {
|
||||
case c0 < 0x80: // is ASCII
|
||||
return Properties{entry: bidiValues[c0]}, 1
|
||||
case c0 < 0xC2:
|
||||
return Properties{}, 1
|
||||
case c0 < 0xE0: // 2-byte UTF-8
|
||||
if len(s) < 2 {
|
||||
return Properties{}, 0
|
||||
}
|
||||
i := bidiIndex[c0]
|
||||
c1 := s[1]
|
||||
if c1 < 0x80 || 0xC0 <= c1 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
return Properties{entry: trie.lookupValue(uint32(i), c1)}, 2
|
||||
case c0 < 0xF0: // 3-byte UTF-8
|
||||
if len(s) < 3 {
|
||||
return Properties{}, 0
|
||||
}
|
||||
i := bidiIndex[c0]
|
||||
c1 := s[1]
|
||||
if c1 < 0x80 || 0xC0 <= c1 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
o := uint32(i)<<6 + uint32(c1)
|
||||
i = bidiIndex[o]
|
||||
c2 := s[2]
|
||||
if c2 < 0x80 || 0xC0 <= c2 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
return Properties{entry: trie.lookupValue(uint32(i), c2), last: c2}, 3
|
||||
case c0 < 0xF8: // 4-byte UTF-8
|
||||
if len(s) < 4 {
|
||||
return Properties{}, 0
|
||||
}
|
||||
i := bidiIndex[c0]
|
||||
c1 := s[1]
|
||||
if c1 < 0x80 || 0xC0 <= c1 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
o := uint32(i)<<6 + uint32(c1)
|
||||
i = bidiIndex[o]
|
||||
c2 := s[2]
|
||||
if c2 < 0x80 || 0xC0 <= c2 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
o = uint32(i)<<6 + uint32(c2)
|
||||
i = bidiIndex[o]
|
||||
c3 := s[3]
|
||||
if c3 < 0x80 || 0xC0 <= c3 {
|
||||
return Properties{}, 1
|
||||
}
|
||||
return Properties{entry: trie.lookupValue(uint32(i), c3)}, 4
|
||||
}
|
||||
// Illegal rune
|
||||
return Properties{}, 1
|
||||
}
|
1779
vendor/golang.org/x/text/unicode/bidi/tables.go
generated
vendored
Normal file
1779
vendor/golang.org/x/text/unicode/bidi/tables.go
generated
vendored
Normal file
File diff suppressed because it is too large
Load diff
60
vendor/golang.org/x/text/unicode/bidi/trieval.go
generated
vendored
Normal file
60
vendor/golang.org/x/text/unicode/bidi/trieval.go
generated
vendored
Normal file
|
@ -0,0 +1,60 @@
|
|||
// Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
|
||||
|
||||
package bidi
|
||||
|
||||
// Class is the Unicode BiDi class. Each rune has a single class.
|
||||
type Class uint
|
||||
|
||||
const (
|
||||
L Class = iota // LeftToRight
|
||||
R // RightToLeft
|
||||
EN // EuropeanNumber
|
||||
ES // EuropeanSeparator
|
||||
ET // EuropeanTerminator
|
||||
AN // ArabicNumber
|
||||
CS // CommonSeparator
|
||||
B // ParagraphSeparator
|
||||
S // SegmentSeparator
|
||||
WS // WhiteSpace
|
||||
ON // OtherNeutral
|
||||
BN // BoundaryNeutral
|
||||
NSM // NonspacingMark
|
||||
AL // ArabicLetter
|
||||
Control // Control LRO - PDI
|
||||
|
||||
numClass
|
||||
|
||||
LRO // LeftToRightOverride
|
||||
RLO // RightToLeftOverride
|
||||
LRE // LeftToRightEmbedding
|
||||
RLE // RightToLeftEmbedding
|
||||
PDF // PopDirectionalFormat
|
||||
LRI // LeftToRightIsolate
|
||||
RLI // RightToLeftIsolate
|
||||
FSI // FirstStrongIsolate
|
||||
PDI // PopDirectionalIsolate
|
||||
|
||||
unknownClass = ^Class(0)
|
||||
)
|
||||
|
||||
var controlToClass = map[rune]Class{
|
||||
0x202D: LRO, // LeftToRightOverride,
|
||||
0x202E: RLO, // RightToLeftOverride,
|
||||
0x202A: LRE, // LeftToRightEmbedding,
|
||||
0x202B: RLE, // RightToLeftEmbedding,
|
||||
0x202C: PDF, // PopDirectionalFormat,
|
||||
0x2066: LRI, // LeftToRightIsolate,
|
||||
0x2067: RLI, // RightToLeftIsolate,
|
||||
0x2068: FSI, // FirstStrongIsolate,
|
||||
0x2069: PDI, // PopDirectionalIsolate,
|
||||
}
|
||||
|
||||
// A trie entry has the following bits:
|
||||
// 7..5 XOR mask for brackets
|
||||
// 4 1: Bracket open, 0: Bracket close
|
||||
// 3..0 Class type
|
||||
|
||||
const (
|
||||
openMask = 0x10
|
||||
xorMaskShift = 5
|
||||
)
|
508
vendor/golang.org/x/text/unicode/norm/composition.go
generated
vendored
Normal file
508
vendor/golang.org/x/text/unicode/norm/composition.go
generated
vendored
Normal file
|
@ -0,0 +1,508 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package norm
|
||||
|
||||
import "unicode/utf8"
|
||||
|
||||
const (
|
||||
maxNonStarters = 30
|
||||
// The maximum number of characters needed for a buffer is
|
||||
// maxNonStarters + 1 for the starter + 1 for the GCJ
|
||||
maxBufferSize = maxNonStarters + 2
|
||||
maxNFCExpansion = 3 // NFC(0x1D160)
|
||||
maxNFKCExpansion = 18 // NFKC(0xFDFA)
|
||||
|
||||
maxByteBufferSize = utf8.UTFMax * maxBufferSize // 128
|
||||
)
|
||||
|
||||
// ssState is used for reporting the segment state after inserting a rune.
|
||||
// It is returned by streamSafe.next.
|
||||
type ssState int
|
||||
|
||||
const (
|
||||
// Indicates a rune was successfully added to the segment.
|
||||
ssSuccess ssState = iota
|
||||
// Indicates a rune starts a new segment and should not be added.
|
||||
ssStarter
|
||||
// Indicates a rune caused a segment overflow and a CGJ should be inserted.
|
||||
ssOverflow
|
||||
)
|
||||
|
||||
// streamSafe implements the policy of when a CGJ should be inserted.
|
||||
type streamSafe uint8
|
||||
|
||||
// first inserts the first rune of a segment. It is a faster version of next if
|
||||
// it is known p represents the first rune in a segment.
|
||||
func (ss *streamSafe) first(p Properties) {
|
||||
*ss = streamSafe(p.nTrailingNonStarters())
|
||||
}
|
||||
|
||||
// insert returns a ssState value to indicate whether a rune represented by p
|
||||
// can be inserted.
|
||||
func (ss *streamSafe) next(p Properties) ssState {
|
||||
if *ss > maxNonStarters {
|
||||
panic("streamSafe was not reset")
|
||||
}
|
||||
n := p.nLeadingNonStarters()
|
||||
if *ss += streamSafe(n); *ss > maxNonStarters {
|
||||
*ss = 0
|
||||
return ssOverflow
|
||||
}
|
||||
// The Stream-Safe Text Processing prescribes that the counting can stop
|
||||
// as soon as a starter is encountered. However, there are some starters,
|
||||
// like Jamo V and T, that can combine with other runes, leaving their
|
||||
// successive non-starters appended to the previous, possibly causing an
|
||||
// overflow. We will therefore consider any rune with a non-zero nLead to
|
||||
// be a non-starter. Note that it always hold that if nLead > 0 then
|
||||
// nLead == nTrail.
|
||||
if n == 0 {
|
||||
*ss = streamSafe(p.nTrailingNonStarters())
|
||||
return ssStarter
|
||||
}
|
||||
return ssSuccess
|
||||
}
|
||||
|
||||
// backwards is used for checking for overflow and segment starts
|
||||
// when traversing a string backwards. Users do not need to call first
|
||||
// for the first rune. The state of the streamSafe retains the count of
|
||||
// the non-starters loaded.
|
||||
func (ss *streamSafe) backwards(p Properties) ssState {
|
||||
if *ss > maxNonStarters {
|
||||
panic("streamSafe was not reset")
|
||||
}
|
||||
c := *ss + streamSafe(p.nTrailingNonStarters())
|
||||
if c > maxNonStarters {
|
||||
return ssOverflow
|
||||
}
|
||||
*ss = c
|
||||
if p.nLeadingNonStarters() == 0 {
|
||||
return ssStarter
|
||||
}
|
||||
return ssSuccess
|
||||
}
|
||||
|
||||
func (ss streamSafe) isMax() bool {
|
||||
return ss == maxNonStarters
|
||||
}
|
||||
|
||||
// GraphemeJoiner is inserted after maxNonStarters non-starter runes.
|
||||
const GraphemeJoiner = "\u034F"
|
||||
|
||||
// reorderBuffer is used to normalize a single segment. Characters inserted with
|
||||
// insert are decomposed and reordered based on CCC. The compose method can
|
||||
// be used to recombine characters. Note that the byte buffer does not hold
|
||||
// the UTF-8 characters in order. Only the rune array is maintained in sorted
|
||||
// order. flush writes the resulting segment to a byte array.
|
||||
type reorderBuffer struct {
|
||||
rune [maxBufferSize]Properties // Per character info.
|
||||
byte [maxByteBufferSize]byte // UTF-8 buffer. Referenced by runeInfo.pos.
|
||||
nbyte uint8 // Number or bytes.
|
||||
ss streamSafe // For limiting length of non-starter sequence.
|
||||
nrune int // Number of runeInfos.
|
||||
f formInfo
|
||||
|
||||
src input
|
||||
nsrc int
|
||||
tmpBytes input
|
||||
|
||||
out []byte
|
||||
flushF func(*reorderBuffer) bool
|
||||
}
|
||||
|
||||
func (rb *reorderBuffer) init(f Form, src []byte) {
|
||||
rb.f = *formTable[f]
|
||||
rb.src.setBytes(src)
|
||||
rb.nsrc = len(src)
|
||||
rb.ss = 0
|
||||
}
|
||||
|
||||
func (rb *reorderBuffer) initString(f Form, src string) {
|
||||
rb.f = *formTable[f]
|
||||
rb.src.setString(src)
|
||||
rb.nsrc = len(src)
|
||||
rb.ss = 0
|
||||
}
|
||||
|
||||
func (rb *reorderBuffer) setFlusher(out []byte, f func(*reorderBuffer) bool) {
|
||||
rb.out = out
|
||||
rb.flushF = f
|
||||
}
|
||||
|
||||
// reset discards all characters from the buffer.
|
||||
func (rb *reorderBuffer) reset() {
|
||||
rb.nrune = 0
|
||||
rb.nbyte = 0
|
||||
}
|
||||
|
||||
func (rb *reorderBuffer) doFlush() bool {
|
||||
if rb.f.composing {
|
||||
rb.compose()
|
||||
}
|
||||
res := rb.flushF(rb)
|
||||
rb.reset()
|
||||
return res
|
||||
}
|
||||
|
||||
// appendFlush appends the normalized segment to rb.out.
|
||||
func appendFlush(rb *reorderBuffer) bool {
|
||||
for i := 0; i < rb.nrune; i++ {
|
||||
start := rb.rune[i].pos
|
||||
end := start + rb.rune[i].size
|
||||
rb.out = append(rb.out, rb.byte[start:end]...)
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
// flush appends the normalized segment to out and resets rb.
|
||||
func (rb *reorderBuffer) flush(out []byte) []byte {
|
||||
for i := 0; i < rb.nrune; i++ {
|
||||
start := rb.rune[i].pos
|
||||
end := start + rb.rune[i].size
|
||||
out = append(out, rb.byte[start:end]...)
|
||||
}
|
||||
rb.reset()
|
||||
return out
|
||||
}
|
||||
|
||||
// flushCopy copies the normalized segment to buf and resets rb.
|
||||
// It returns the number of bytes written to buf.
|
||||
func (rb *reorderBuffer) flushCopy(buf []byte) int {
|
||||
p := 0
|
||||
for i := 0; i < rb.nrune; i++ {
|
||||
runep := rb.rune[i]
|
||||
p += copy(buf[p:], rb.byte[runep.pos:runep.pos+runep.size])
|
||||
}
|
||||
rb.reset()
|
||||
return p
|
||||
}
|
||||
|
||||
// insertOrdered inserts a rune in the buffer, ordered by Canonical Combining Class.
|
||||
// It returns false if the buffer is not large enough to hold the rune.
|
||||
// It is used internally by insert and insertString only.
|
||||
func (rb *reorderBuffer) insertOrdered(info Properties) {
|
||||
n := rb.nrune
|
||||
b := rb.rune[:]
|
||||
cc := info.ccc
|
||||
if cc > 0 {
|
||||
// Find insertion position + move elements to make room.
|
||||
for ; n > 0; n-- {
|
||||
if b[n-1].ccc <= cc {
|
||||
break
|
||||
}
|
||||
b[n] = b[n-1]
|
||||
}
|
||||
}
|
||||
rb.nrune += 1
|
||||
pos := uint8(rb.nbyte)
|
||||
rb.nbyte += utf8.UTFMax
|
||||
info.pos = pos
|
||||
b[n] = info
|
||||
}
|
||||
|
||||
// insertErr is an error code returned by insert. Using this type instead
|
||||
// of error improves performance up to 20% for many of the benchmarks.
|
||||
type insertErr int
|
||||
|
||||
const (
|
||||
iSuccess insertErr = -iota
|
||||
iShortDst
|
||||
iShortSrc
|
||||
)
|
||||
|
||||
// insertFlush inserts the given rune in the buffer ordered by CCC.
|
||||
// If a decomposition with multiple segments are encountered, they leading
|
||||
// ones are flushed.
|
||||
// It returns a non-zero error code if the rune was not inserted.
|
||||
func (rb *reorderBuffer) insertFlush(src input, i int, info Properties) insertErr {
|
||||
if rune := src.hangul(i); rune != 0 {
|
||||
rb.decomposeHangul(rune)
|
||||
return iSuccess
|
||||
}
|
||||
if info.hasDecomposition() {
|
||||
return rb.insertDecomposed(info.Decomposition())
|
||||
}
|
||||
rb.insertSingle(src, i, info)
|
||||
return iSuccess
|
||||
}
|
||||
|
||||
// insertUnsafe inserts the given rune in the buffer ordered by CCC.
|
||||
// It is assumed there is sufficient space to hold the runes. It is the
|
||||
// responsibility of the caller to ensure this. This can be done by checking
|
||||
// the state returned by the streamSafe type.
|
||||
func (rb *reorderBuffer) insertUnsafe(src input, i int, info Properties) {
|
||||
if rune := src.hangul(i); rune != 0 {
|
||||
rb.decomposeHangul(rune)
|
||||
}
|
||||
if info.hasDecomposition() {
|
||||
// TODO: inline.
|
||||
rb.insertDecomposed(info.Decomposition())
|
||||
} else {
|
||||
rb.insertSingle(src, i, info)
|
||||
}
|
||||
}
|
||||
|
||||
// insertDecomposed inserts an entry in to the reorderBuffer for each rune
|
||||
// in dcomp. dcomp must be a sequence of decomposed UTF-8-encoded runes.
|
||||
// It flushes the buffer on each new segment start.
|
||||
func (rb *reorderBuffer) insertDecomposed(dcomp []byte) insertErr {
|
||||
rb.tmpBytes.setBytes(dcomp)
|
||||
// As the streamSafe accounting already handles the counting for modifiers,
|
||||
// we don't have to call next. However, we do need to keep the accounting
|
||||
// intact when flushing the buffer.
|
||||
for i := 0; i < len(dcomp); {
|
||||
info := rb.f.info(rb.tmpBytes, i)
|
||||
if info.BoundaryBefore() && rb.nrune > 0 && !rb.doFlush() {
|
||||
return iShortDst
|
||||
}
|
||||
i += copy(rb.byte[rb.nbyte:], dcomp[i:i+int(info.size)])
|
||||
rb.insertOrdered(info)
|
||||
}
|
||||
return iSuccess
|
||||
}
|
||||
|
||||
// insertSingle inserts an entry in the reorderBuffer for the rune at
|
||||
// position i. info is the runeInfo for the rune at position i.
|
||||
func (rb *reorderBuffer) insertSingle(src input, i int, info Properties) {
|
||||
src.copySlice(rb.byte[rb.nbyte:], i, i+int(info.size))
|
||||
rb.insertOrdered(info)
|
||||
}
|
||||
|
||||
// insertCGJ inserts a Combining Grapheme Joiner (0x034f) into rb.
|
||||
func (rb *reorderBuffer) insertCGJ() {
|
||||
rb.insertSingle(input{str: GraphemeJoiner}, 0, Properties{size: uint8(len(GraphemeJoiner))})
|
||||
}
|
||||
|
||||
// appendRune inserts a rune at the end of the buffer. It is used for Hangul.
|
||||
func (rb *reorderBuffer) appendRune(r rune) {
|
||||
bn := rb.nbyte
|
||||
sz := utf8.EncodeRune(rb.byte[bn:], rune(r))
|
||||
rb.nbyte += utf8.UTFMax
|
||||
rb.rune[rb.nrune] = Properties{pos: bn, size: uint8(sz)}
|
||||
rb.nrune++
|
||||
}
|
||||
|
||||
// assignRune sets a rune at position pos. It is used for Hangul and recomposition.
|
||||
func (rb *reorderBuffer) assignRune(pos int, r rune) {
|
||||
bn := rb.rune[pos].pos
|
||||
sz := utf8.EncodeRune(rb.byte[bn:], rune(r))
|
||||
rb.rune[pos] = Properties{pos: bn, size: uint8(sz)}
|
||||
}
|
||||
|
||||
// runeAt returns the rune at position n. It is used for Hangul and recomposition.
|
||||
func (rb *reorderBuffer) runeAt(n int) rune {
|
||||
inf := rb.rune[n]
|
||||
r, _ := utf8.DecodeRune(rb.byte[inf.pos : inf.pos+inf.size])
|
||||
return r
|
||||
}
|
||||
|
||||
// bytesAt returns the UTF-8 encoding of the rune at position n.
|
||||
// It is used for Hangul and recomposition.
|
||||
func (rb *reorderBuffer) bytesAt(n int) []byte {
|
||||
inf := rb.rune[n]
|
||||
return rb.byte[inf.pos : int(inf.pos)+int(inf.size)]
|
||||
}
|
||||
|
||||
// For Hangul we combine algorithmically, instead of using tables.
|
||||
const (
|
||||
hangulBase = 0xAC00 // UTF-8(hangulBase) -> EA B0 80
|
||||
hangulBase0 = 0xEA
|
||||
hangulBase1 = 0xB0
|
||||
hangulBase2 = 0x80
|
||||
|
||||
hangulEnd = hangulBase + jamoLVTCount // UTF-8(0xD7A4) -> ED 9E A4
|
||||
hangulEnd0 = 0xED
|
||||
hangulEnd1 = 0x9E
|
||||
hangulEnd2 = 0xA4
|
||||
|
||||
jamoLBase = 0x1100 // UTF-8(jamoLBase) -> E1 84 00
|
||||
jamoLBase0 = 0xE1
|
||||
jamoLBase1 = 0x84
|
||||
jamoLEnd = 0x1113
|
||||
jamoVBase = 0x1161
|
||||
jamoVEnd = 0x1176
|
||||
jamoTBase = 0x11A7
|
||||
jamoTEnd = 0x11C3
|
||||
|
||||
jamoTCount = 28
|
||||
jamoVCount = 21
|
||||
jamoVTCount = 21 * 28
|
||||
jamoLVTCount = 19 * 21 * 28
|
||||
)
|
||||
|
||||
const hangulUTF8Size = 3
|
||||
|
||||
func isHangul(b []byte) bool {
|
||||
if len(b) < hangulUTF8Size {
|
||||
return false
|
||||
}
|
||||
b0 := b[0]
|
||||
if b0 < hangulBase0 {
|
||||
return false
|
||||
}
|
||||
b1 := b[1]
|
||||
switch {
|
||||
case b0 == hangulBase0:
|
||||
return b1 >= hangulBase1
|
||||
case b0 < hangulEnd0:
|
||||
return true
|
||||
case b0 > hangulEnd0:
|
||||
return false
|
||||
case b1 < hangulEnd1:
|
||||
return true
|
||||
}
|
||||
return b1 == hangulEnd1 && b[2] < hangulEnd2
|
||||
}
|
||||
|
||||
func isHangulString(b string) bool {
|
||||
if len(b) < hangulUTF8Size {
|
||||
return false
|
||||
}
|
||||
b0 := b[0]
|
||||
if b0 < hangulBase0 {
|
||||
return false
|
||||
}
|
||||
b1 := b[1]
|
||||
switch {
|
||||
case b0 == hangulBase0:
|
||||
return b1 >= hangulBase1
|
||||
case b0 < hangulEnd0:
|
||||
return true
|
||||
case b0 > hangulEnd0:
|
||||
return false
|
||||
case b1 < hangulEnd1:
|
||||
return true
|
||||
}
|
||||
return b1 == hangulEnd1 && b[2] < hangulEnd2
|
||||
}
|
||||
|
||||
// Caller must ensure len(b) >= 2.
|
||||
func isJamoVT(b []byte) bool {
|
||||
// True if (rune & 0xff00) == jamoLBase
|
||||
return b[0] == jamoLBase0 && (b[1]&0xFC) == jamoLBase1
|
||||
}
|
||||
|
||||
func isHangulWithoutJamoT(b []byte) bool {
|
||||
c, _ := utf8.DecodeRune(b)
|
||||
c -= hangulBase
|
||||
return c < jamoLVTCount && c%jamoTCount == 0
|
||||
}
|
||||
|
||||
// decomposeHangul writes the decomposed Hangul to buf and returns the number
|
||||
// of bytes written. len(buf) should be at least 9.
|
||||
func decomposeHangul(buf []byte, r rune) int {
|
||||
const JamoUTF8Len = 3
|
||||
r -= hangulBase
|
||||
x := r % jamoTCount
|
||||
r /= jamoTCount
|
||||
utf8.EncodeRune(buf, jamoLBase+r/jamoVCount)
|
||||
utf8.EncodeRune(buf[JamoUTF8Len:], jamoVBase+r%jamoVCount)
|
||||
if x != 0 {
|
||||
utf8.EncodeRune(buf[2*JamoUTF8Len:], jamoTBase+x)
|
||||
return 3 * JamoUTF8Len
|
||||
}
|
||||
return 2 * JamoUTF8Len
|
||||
}
|
||||
|
||||
// decomposeHangul algorithmically decomposes a Hangul rune into
|
||||
// its Jamo components.
|
||||
// See http://unicode.org/reports/tr15/#Hangul for details on decomposing Hangul.
|
||||
func (rb *reorderBuffer) decomposeHangul(r rune) {
|
||||
r -= hangulBase
|
||||
x := r % jamoTCount
|
||||
r /= jamoTCount
|
||||
rb.appendRune(jamoLBase + r/jamoVCount)
|
||||
rb.appendRune(jamoVBase + r%jamoVCount)
|
||||
if x != 0 {
|
||||
rb.appendRune(jamoTBase + x)
|
||||
}
|
||||
}
|
||||
|
||||
// combineHangul algorithmically combines Jamo character components into Hangul.
|
||||
// See http://unicode.org/reports/tr15/#Hangul for details on combining Hangul.
|
||||
func (rb *reorderBuffer) combineHangul(s, i, k int) {
|
||||
b := rb.rune[:]
|
||||
bn := rb.nrune
|
||||
for ; i < bn; i++ {
|
||||
cccB := b[k-1].ccc
|
||||
cccC := b[i].ccc
|
||||
if cccB == 0 {
|
||||
s = k - 1
|
||||
}
|
||||
if s != k-1 && cccB >= cccC {
|
||||
// b[i] is blocked by greater-equal cccX below it
|
||||
b[k] = b[i]
|
||||
k++
|
||||
} else {
|
||||
l := rb.runeAt(s) // also used to compare to hangulBase
|
||||
v := rb.runeAt(i) // also used to compare to jamoT
|
||||
switch {
|
||||
case jamoLBase <= l && l < jamoLEnd &&
|
||||
jamoVBase <= v && v < jamoVEnd:
|
||||
// 11xx plus 116x to LV
|
||||
rb.assignRune(s, hangulBase+
|
||||
(l-jamoLBase)*jamoVTCount+(v-jamoVBase)*jamoTCount)
|
||||
case hangulBase <= l && l < hangulEnd &&
|
||||
jamoTBase < v && v < jamoTEnd &&
|
||||
((l-hangulBase)%jamoTCount) == 0:
|
||||
// ACxx plus 11Ax to LVT
|
||||
rb.assignRune(s, l+v-jamoTBase)
|
||||
default:
|
||||
b[k] = b[i]
|
||||
k++
|
||||
}
|
||||
}
|
||||
}
|
||||
rb.nrune = k
|
||||
}
|
||||
|
||||
// compose recombines the runes in the buffer.
|
||||
// It should only be used to recompose a single segment, as it will not
|
||||
// handle alternations between Hangul and non-Hangul characters correctly.
|
||||
func (rb *reorderBuffer) compose() {
|
||||
// UAX #15, section X5 , including Corrigendum #5
|
||||
// "In any character sequence beginning with starter S, a character C is
|
||||
// blocked from S if and only if there is some character B between S
|
||||
// and C, and either B is a starter or it has the same or higher
|
||||
// combining class as C."
|
||||
bn := rb.nrune
|
||||
if bn == 0 {
|
||||
return
|
||||
}
|
||||
k := 1
|
||||
b := rb.rune[:]
|
||||
for s, i := 0, 1; i < bn; i++ {
|
||||
if isJamoVT(rb.bytesAt(i)) {
|
||||
// Redo from start in Hangul mode. Necessary to support
|
||||
// U+320E..U+321E in NFKC mode.
|
||||
rb.combineHangul(s, i, k)
|
||||
return
|
||||
}
|
||||
ii := b[i]
|
||||
// We can only use combineForward as a filter if we later
|
||||
// get the info for the combined character. This is more
|
||||
// expensive than using the filter. Using combinesBackward()
|
||||
// is safe.
|
||||
if ii.combinesBackward() {
|
||||
cccB := b[k-1].ccc
|
||||
cccC := ii.ccc
|
||||
blocked := false // b[i] blocked by starter or greater or equal CCC?
|
||||
if cccB == 0 {
|
||||
s = k - 1
|
||||
} else {
|
||||
blocked = s != k-1 && cccB >= cccC
|
||||
}
|
||||
if !blocked {
|
||||
combined := combine(rb.runeAt(s), rb.runeAt(i))
|
||||
if combined != 0 {
|
||||
rb.assignRune(s, combined)
|
||||
continue
|
||||
}
|
||||
}
|
||||
}
|
||||
b[k] = b[i]
|
||||
k++
|
||||
}
|
||||
rb.nrune = k
|
||||
}
|
259
vendor/golang.org/x/text/unicode/norm/forminfo.go
generated
vendored
Normal file
259
vendor/golang.org/x/text/unicode/norm/forminfo.go
generated
vendored
Normal file
|
@ -0,0 +1,259 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package norm
|
||||
|
||||
// This file contains Form-specific logic and wrappers for data in tables.go.
|
||||
|
||||
// Rune info is stored in a separate trie per composing form. A composing form
|
||||
// and its corresponding decomposing form share the same trie. Each trie maps
|
||||
// a rune to a uint16. The values take two forms. For v >= 0x8000:
|
||||
// bits
|
||||
// 15: 1 (inverse of NFD_QC bit of qcInfo)
|
||||
// 13..7: qcInfo (see below). isYesD is always true (no decompostion).
|
||||
// 6..0: ccc (compressed CCC value).
|
||||
// For v < 0x8000, the respective rune has a decomposition and v is an index
|
||||
// into a byte array of UTF-8 decomposition sequences and additional info and
|
||||
// has the form:
|
||||
// <header> <decomp_byte>* [<tccc> [<lccc>]]
|
||||
// The header contains the number of bytes in the decomposition (excluding this
|
||||
// length byte). The two most significant bits of this length byte correspond
|
||||
// to bit 5 and 4 of qcInfo (see below). The byte sequence itself starts at v+1.
|
||||
// The byte sequence is followed by a trailing and leading CCC if the values
|
||||
// for these are not zero. The value of v determines which ccc are appended
|
||||
// to the sequences. For v < firstCCC, there are none, for v >= firstCCC,
|
||||
// the sequence is followed by a trailing ccc, and for v >= firstLeadingCC
|
||||
// there is an additional leading ccc. The value of tccc itself is the
|
||||
// trailing CCC shifted left 2 bits. The two least-significant bits of tccc
|
||||
// are the number of trailing non-starters.
|
||||
|
||||
const (
|
||||
qcInfoMask = 0x3F // to clear all but the relevant bits in a qcInfo
|
||||
headerLenMask = 0x3F // extract the length value from the header byte
|
||||
headerFlagsMask = 0xC0 // extract the qcInfo bits from the header byte
|
||||
)
|
||||
|
||||
// Properties provides access to normalization properties of a rune.
|
||||
type Properties struct {
|
||||
pos uint8 // start position in reorderBuffer; used in composition.go
|
||||
size uint8 // length of UTF-8 encoding of this rune
|
||||
ccc uint8 // leading canonical combining class (ccc if not decomposition)
|
||||
tccc uint8 // trailing canonical combining class (ccc if not decomposition)
|
||||
nLead uint8 // number of leading non-starters.
|
||||
flags qcInfo // quick check flags
|
||||
index uint16
|
||||
}
|
||||
|
||||
// functions dispatchable per form
|
||||
type lookupFunc func(b input, i int) Properties
|
||||
|
||||
// formInfo holds Form-specific functions and tables.
|
||||
type formInfo struct {
|
||||
form Form
|
||||
composing, compatibility bool // form type
|
||||
info lookupFunc
|
||||
nextMain iterFunc
|
||||
}
|
||||
|
||||
var formTable = []*formInfo{{
|
||||
form: NFC,
|
||||
composing: true,
|
||||
compatibility: false,
|
||||
info: lookupInfoNFC,
|
||||
nextMain: nextComposed,
|
||||
}, {
|
||||
form: NFD,
|
||||
composing: false,
|
||||
compatibility: false,
|
||||
info: lookupInfoNFC,
|
||||
nextMain: nextDecomposed,
|
||||
}, {
|
||||
form: NFKC,
|
||||
composing: true,
|
||||
compatibility: true,
|
||||
info: lookupInfoNFKC,
|
||||
nextMain: nextComposed,
|
||||
}, {
|
||||
form: NFKD,
|
||||
composing: false,
|
||||
compatibility: true,
|
||||
info: lookupInfoNFKC,
|
||||
nextMain: nextDecomposed,
|
||||
}}
|
||||
|
||||
// We do not distinguish between boundaries for NFC, NFD, etc. to avoid
|
||||
// unexpected behavior for the user. For example, in NFD, there is a boundary
|
||||
// after 'a'. However, 'a' might combine with modifiers, so from the application's
|
||||
// perspective it is not a good boundary. We will therefore always use the
|
||||
// boundaries for the combining variants.
|
||||
|
||||
// BoundaryBefore returns true if this rune starts a new segment and
|
||||
// cannot combine with any rune on the left.
|
||||
func (p Properties) BoundaryBefore() bool {
|
||||
if p.ccc == 0 && !p.combinesBackward() {
|
||||
return true
|
||||
}
|
||||
// We assume that the CCC of the first character in a decomposition
|
||||
// is always non-zero if different from info.ccc and that we can return
|
||||
// false at this point. This is verified by maketables.
|
||||
return false
|
||||
}
|
||||
|
||||
// BoundaryAfter returns true if runes cannot combine with or otherwise
|
||||
// interact with this or previous runes.
|
||||
func (p Properties) BoundaryAfter() bool {
|
||||
// TODO: loosen these conditions.
|
||||
return p.isInert()
|
||||
}
|
||||
|
||||
// We pack quick check data in 4 bits:
|
||||
// 5: Combines forward (0 == false, 1 == true)
|
||||
// 4..3: NFC_QC Yes(00), No (10), or Maybe (11)
|
||||
// 2: NFD_QC Yes (0) or No (1). No also means there is a decomposition.
|
||||
// 1..0: Number of trailing non-starters.
|
||||
//
|
||||
// When all 4 bits are zero, the character is inert, meaning it is never
|
||||
// influenced by normalization.
|
||||
type qcInfo uint8
|
||||
|
||||
func (p Properties) isYesC() bool { return p.flags&0x10 == 0 }
|
||||
func (p Properties) isYesD() bool { return p.flags&0x4 == 0 }
|
||||
|
||||
func (p Properties) combinesForward() bool { return p.flags&0x20 != 0 }
|
||||
func (p Properties) combinesBackward() bool { return p.flags&0x8 != 0 } // == isMaybe
|
||||
func (p Properties) hasDecomposition() bool { return p.flags&0x4 != 0 } // == isNoD
|
||||
|
||||
func (p Properties) isInert() bool {
|
||||
return p.flags&qcInfoMask == 0 && p.ccc == 0
|
||||
}
|
||||
|
||||
func (p Properties) multiSegment() bool {
|
||||
return p.index >= firstMulti && p.index < endMulti
|
||||
}
|
||||
|
||||
func (p Properties) nLeadingNonStarters() uint8 {
|
||||
return p.nLead
|
||||
}
|
||||
|
||||
func (p Properties) nTrailingNonStarters() uint8 {
|
||||
return uint8(p.flags & 0x03)
|
||||
}
|
||||
|
||||
// Decomposition returns the decomposition for the underlying rune
|
||||
// or nil if there is none.
|
||||
func (p Properties) Decomposition() []byte {
|
||||
// TODO: create the decomposition for Hangul?
|
||||
if p.index == 0 {
|
||||
return nil
|
||||
}
|
||||
i := p.index
|
||||
n := decomps[i] & headerLenMask
|
||||
i++
|
||||
return decomps[i : i+uint16(n)]
|
||||
}
|
||||
|
||||
// Size returns the length of UTF-8 encoding of the rune.
|
||||
func (p Properties) Size() int {
|
||||
return int(p.size)
|
||||
}
|
||||
|
||||
// CCC returns the canonical combining class of the underlying rune.
|
||||
func (p Properties) CCC() uint8 {
|
||||
if p.index >= firstCCCZeroExcept {
|
||||
return 0
|
||||
}
|
||||
return ccc[p.ccc]
|
||||
}
|
||||
|
||||
// LeadCCC returns the CCC of the first rune in the decomposition.
|
||||
// If there is no decomposition, LeadCCC equals CCC.
|
||||
func (p Properties) LeadCCC() uint8 {
|
||||
return ccc[p.ccc]
|
||||
}
|
||||
|
||||
// TrailCCC returns the CCC of the last rune in the decomposition.
|
||||
// If there is no decomposition, TrailCCC equals CCC.
|
||||
func (p Properties) TrailCCC() uint8 {
|
||||
return ccc[p.tccc]
|
||||
}
|
||||
|
||||
// Recomposition
|
||||
// We use 32-bit keys instead of 64-bit for the two codepoint keys.
|
||||
// This clips off the bits of three entries, but we know this will not
|
||||
// result in a collision. In the unlikely event that changes to
|
||||
// UnicodeData.txt introduce collisions, the compiler will catch it.
|
||||
// Note that the recomposition map for NFC and NFKC are identical.
|
||||
|
||||
// combine returns the combined rune or 0 if it doesn't exist.
|
||||
func combine(a, b rune) rune {
|
||||
key := uint32(uint16(a))<<16 + uint32(uint16(b))
|
||||
return recompMap[key]
|
||||
}
|
||||
|
||||
func lookupInfoNFC(b input, i int) Properties {
|
||||
v, sz := b.charinfoNFC(i)
|
||||
return compInfo(v, sz)
|
||||
}
|
||||
|
||||
func lookupInfoNFKC(b input, i int) Properties {
|
||||
v, sz := b.charinfoNFKC(i)
|
||||
return compInfo(v, sz)
|
||||
}
|
||||
|
||||
// Properties returns properties for the first rune in s.
|
||||
func (f Form) Properties(s []byte) Properties {
|
||||
if f == NFC || f == NFD {
|
||||
return compInfo(nfcData.lookup(s))
|
||||
}
|
||||
return compInfo(nfkcData.lookup(s))
|
||||
}
|
||||
|
||||
// PropertiesString returns properties for the first rune in s.
|
||||
func (f Form) PropertiesString(s string) Properties {
|
||||
if f == NFC || f == NFD {
|
||||
return compInfo(nfcData.lookupString(s))
|
||||
}
|
||||
return compInfo(nfkcData.lookupString(s))
|
||||
}
|
||||
|
||||
// compInfo converts the information contained in v and sz
|
||||
// to a Properties. See the comment at the top of the file
|
||||
// for more information on the format.
|
||||
func compInfo(v uint16, sz int) Properties {
|
||||
if v == 0 {
|
||||
return Properties{size: uint8(sz)}
|
||||
} else if v >= 0x8000 {
|
||||
p := Properties{
|
||||
size: uint8(sz),
|
||||
ccc: uint8(v),
|
||||
tccc: uint8(v),
|
||||
flags: qcInfo(v >> 8),
|
||||
}
|
||||
if p.ccc > 0 || p.combinesBackward() {
|
||||
p.nLead = uint8(p.flags & 0x3)
|
||||
}
|
||||
return p
|
||||
}
|
||||
// has decomposition
|
||||
h := decomps[v]
|
||||
f := (qcInfo(h&headerFlagsMask) >> 2) | 0x4
|
||||
p := Properties{size: uint8(sz), flags: f, index: v}
|
||||
if v >= firstCCC {
|
||||
v += uint16(h&headerLenMask) + 1
|
||||
c := decomps[v]
|
||||
p.tccc = c >> 2
|
||||
p.flags |= qcInfo(c & 0x3)
|
||||
if v >= firstLeadingCCC {
|
||||
p.nLead = c & 0x3
|
||||
if v >= firstStarterWithNLead {
|
||||
// We were tricked. Remove the decomposition.
|
||||
p.flags &= 0x03
|
||||
p.index = 0
|
||||
return p
|
||||
}
|
||||
p.ccc = decomps[v+1]
|
||||
}
|
||||
}
|
||||
return p
|
||||
}
|
109
vendor/golang.org/x/text/unicode/norm/input.go
generated
vendored
Normal file
109
vendor/golang.org/x/text/unicode/norm/input.go
generated
vendored
Normal file
|
@ -0,0 +1,109 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package norm
|
||||
|
||||
import "unicode/utf8"
|
||||
|
||||
type input struct {
|
||||
str string
|
||||
bytes []byte
|
||||
}
|
||||
|
||||
func inputBytes(str []byte) input {
|
||||
return input{bytes: str}
|
||||
}
|
||||
|
||||
func inputString(str string) input {
|
||||
return input{str: str}
|
||||
}
|
||||
|
||||
func (in *input) setBytes(str []byte) {
|
||||
in.str = ""
|
||||
in.bytes = str
|
||||
}
|
||||
|
||||
func (in *input) setString(str string) {
|
||||
in.str = str
|
||||
in.bytes = nil
|
||||
}
|
||||
|
||||
func (in *input) _byte(p int) byte {
|
||||
if in.bytes == nil {
|
||||
return in.str[p]
|
||||
}
|
||||
return in.bytes[p]
|
||||
}
|
||||
|
||||
func (in *input) skipASCII(p, max int) int {
|
||||
if in.bytes == nil {
|
||||
for ; p < max && in.str[p] < utf8.RuneSelf; p++ {
|
||||
}
|
||||
} else {
|
||||
for ; p < max && in.bytes[p] < utf8.RuneSelf; p++ {
|
||||
}
|
||||
}
|
||||
return p
|
||||
}
|
||||
|
||||
func (in *input) skipContinuationBytes(p int) int {
|
||||
if in.bytes == nil {
|
||||
for ; p < len(in.str) && !utf8.RuneStart(in.str[p]); p++ {
|
||||
}
|
||||
} else {
|
||||
for ; p < len(in.bytes) && !utf8.RuneStart(in.bytes[p]); p++ {
|
||||
}
|
||||
}
|
||||
return p
|
||||
}
|
||||
|
||||
func (in *input) appendSlice(buf []byte, b, e int) []byte {
|
||||
if in.bytes != nil {
|
||||
return append(buf, in.bytes[b:e]...)
|
||||
}
|
||||
for i := b; i < e; i++ {
|
||||
buf = append(buf, in.str[i])
|
||||
}
|
||||
return buf
|
||||
}
|
||||
|
||||
func (in *input) copySlice(buf []byte, b, e int) int {
|
||||
if in.bytes == nil {
|
||||
return copy(buf, in.str[b:e])
|
||||
}
|
||||
return copy(buf, in.bytes[b:e])
|
||||
}
|
||||
|
||||
func (in *input) charinfoNFC(p int) (uint16, int) {
|
||||
if in.bytes == nil {
|
||||
return nfcData.lookupString(in.str[p:])
|
||||
}
|
||||
return nfcData.lookup(in.bytes[p:])
|
||||
}
|
||||
|
||||
func (in *input) charinfoNFKC(p int) (uint16, int) {
|
||||
if in.bytes == nil {
|
||||
return nfkcData.lookupString(in.str[p:])
|
||||
}
|
||||
return nfkcData.lookup(in.bytes[p:])
|
||||
}
|
||||
|
||||
func (in *input) hangul(p int) (r rune) {
|
||||
var size int
|
||||
if in.bytes == nil {
|
||||
if !isHangulString(in.str[p:]) {
|
||||
return 0
|
||||
}
|
||||
r, size = utf8.DecodeRuneInString(in.str[p:])
|
||||
} else {
|
||||
if !isHangul(in.bytes[p:]) {
|
||||
return 0
|
||||
}
|
||||
r, size = utf8.DecodeRune(in.bytes[p:])
|
||||
}
|
||||
if size != hangulUTF8Size {
|
||||
return 0
|
||||
}
|
||||
return r
|
||||
}
|
457
vendor/golang.org/x/text/unicode/norm/iter.go
generated
vendored
Normal file
457
vendor/golang.org/x/text/unicode/norm/iter.go
generated
vendored
Normal file
|
@ -0,0 +1,457 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package norm
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"unicode/utf8"
|
||||
)
|
||||
|
||||
// MaxSegmentSize is the maximum size of a byte buffer needed to consider any
|
||||
// sequence of starter and non-starter runes for the purpose of normalization.
|
||||
const MaxSegmentSize = maxByteBufferSize
|
||||
|
||||
// An Iter iterates over a string or byte slice, while normalizing it
|
||||
// to a given Form.
|
||||
type Iter struct {
|
||||
rb reorderBuffer
|
||||
buf [maxByteBufferSize]byte
|
||||
info Properties // first character saved from previous iteration
|
||||
next iterFunc // implementation of next depends on form
|
||||
asciiF iterFunc
|
||||
|
||||
p int // current position in input source
|
||||
multiSeg []byte // remainder of multi-segment decomposition
|
||||
}
|
||||
|
||||
type iterFunc func(*Iter) []byte
|
||||
|
||||
// Init initializes i to iterate over src after normalizing it to Form f.
|
||||
func (i *Iter) Init(f Form, src []byte) {
|
||||
i.p = 0
|
||||
if len(src) == 0 {
|
||||
i.setDone()
|
||||
i.rb.nsrc = 0
|
||||
return
|
||||
}
|
||||
i.multiSeg = nil
|
||||
i.rb.init(f, src)
|
||||
i.next = i.rb.f.nextMain
|
||||
i.asciiF = nextASCIIBytes
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
i.rb.ss.first(i.info)
|
||||
}
|
||||
|
||||
// InitString initializes i to iterate over src after normalizing it to Form f.
|
||||
func (i *Iter) InitString(f Form, src string) {
|
||||
i.p = 0
|
||||
if len(src) == 0 {
|
||||
i.setDone()
|
||||
i.rb.nsrc = 0
|
||||
return
|
||||
}
|
||||
i.multiSeg = nil
|
||||
i.rb.initString(f, src)
|
||||
i.next = i.rb.f.nextMain
|
||||
i.asciiF = nextASCIIString
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
i.rb.ss.first(i.info)
|
||||
}
|
||||
|
||||
// Seek sets the segment to be returned by the next call to Next to start
|
||||
// at position p. It is the responsibility of the caller to set p to the
|
||||
// start of a segment.
|
||||
func (i *Iter) Seek(offset int64, whence int) (int64, error) {
|
||||
var abs int64
|
||||
switch whence {
|
||||
case 0:
|
||||
abs = offset
|
||||
case 1:
|
||||
abs = int64(i.p) + offset
|
||||
case 2:
|
||||
abs = int64(i.rb.nsrc) + offset
|
||||
default:
|
||||
return 0, fmt.Errorf("norm: invalid whence")
|
||||
}
|
||||
if abs < 0 {
|
||||
return 0, fmt.Errorf("norm: negative position")
|
||||
}
|
||||
if int(abs) >= i.rb.nsrc {
|
||||
i.setDone()
|
||||
return int64(i.p), nil
|
||||
}
|
||||
i.p = int(abs)
|
||||
i.multiSeg = nil
|
||||
i.next = i.rb.f.nextMain
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
i.rb.ss.first(i.info)
|
||||
return abs, nil
|
||||
}
|
||||
|
||||
// returnSlice returns a slice of the underlying input type as a byte slice.
|
||||
// If the underlying is of type []byte, it will simply return a slice.
|
||||
// If the underlying is of type string, it will copy the slice to the buffer
|
||||
// and return that.
|
||||
func (i *Iter) returnSlice(a, b int) []byte {
|
||||
if i.rb.src.bytes == nil {
|
||||
return i.buf[:copy(i.buf[:], i.rb.src.str[a:b])]
|
||||
}
|
||||
return i.rb.src.bytes[a:b]
|
||||
}
|
||||
|
||||
// Pos returns the byte position at which the next call to Next will commence processing.
|
||||
func (i *Iter) Pos() int {
|
||||
return i.p
|
||||
}
|
||||
|
||||
func (i *Iter) setDone() {
|
||||
i.next = nextDone
|
||||
i.p = i.rb.nsrc
|
||||
}
|
||||
|
||||
// Done returns true if there is no more input to process.
|
||||
func (i *Iter) Done() bool {
|
||||
return i.p >= i.rb.nsrc
|
||||
}
|
||||
|
||||
// Next returns f(i.input[i.Pos():n]), where n is a boundary of i.input.
|
||||
// For any input a and b for which f(a) == f(b), subsequent calls
|
||||
// to Next will return the same segments.
|
||||
// Modifying runes are grouped together with the preceding starter, if such a starter exists.
|
||||
// Although not guaranteed, n will typically be the smallest possible n.
|
||||
func (i *Iter) Next() []byte {
|
||||
return i.next(i)
|
||||
}
|
||||
|
||||
func nextASCIIBytes(i *Iter) []byte {
|
||||
p := i.p + 1
|
||||
if p >= i.rb.nsrc {
|
||||
i.setDone()
|
||||
return i.rb.src.bytes[i.p:p]
|
||||
}
|
||||
if i.rb.src.bytes[p] < utf8.RuneSelf {
|
||||
p0 := i.p
|
||||
i.p = p
|
||||
return i.rb.src.bytes[p0:p]
|
||||
}
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
i.next = i.rb.f.nextMain
|
||||
return i.next(i)
|
||||
}
|
||||
|
||||
func nextASCIIString(i *Iter) []byte {
|
||||
p := i.p + 1
|
||||
if p >= i.rb.nsrc {
|
||||
i.buf[0] = i.rb.src.str[i.p]
|
||||
i.setDone()
|
||||
return i.buf[:1]
|
||||
}
|
||||
if i.rb.src.str[p] < utf8.RuneSelf {
|
||||
i.buf[0] = i.rb.src.str[i.p]
|
||||
i.p = p
|
||||
return i.buf[:1]
|
||||
}
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
i.next = i.rb.f.nextMain
|
||||
return i.next(i)
|
||||
}
|
||||
|
||||
func nextHangul(i *Iter) []byte {
|
||||
p := i.p
|
||||
next := p + hangulUTF8Size
|
||||
if next >= i.rb.nsrc {
|
||||
i.setDone()
|
||||
} else if i.rb.src.hangul(next) == 0 {
|
||||
i.rb.ss.next(i.info)
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
i.next = i.rb.f.nextMain
|
||||
return i.next(i)
|
||||
}
|
||||
i.p = next
|
||||
return i.buf[:decomposeHangul(i.buf[:], i.rb.src.hangul(p))]
|
||||
}
|
||||
|
||||
func nextDone(i *Iter) []byte {
|
||||
return nil
|
||||
}
|
||||
|
||||
// nextMulti is used for iterating over multi-segment decompositions
|
||||
// for decomposing normal forms.
|
||||
func nextMulti(i *Iter) []byte {
|
||||
j := 0
|
||||
d := i.multiSeg
|
||||
// skip first rune
|
||||
for j = 1; j < len(d) && !utf8.RuneStart(d[j]); j++ {
|
||||
}
|
||||
for j < len(d) {
|
||||
info := i.rb.f.info(input{bytes: d}, j)
|
||||
if info.BoundaryBefore() {
|
||||
i.multiSeg = d[j:]
|
||||
return d[:j]
|
||||
}
|
||||
j += int(info.size)
|
||||
}
|
||||
// treat last segment as normal decomposition
|
||||
i.next = i.rb.f.nextMain
|
||||
return i.next(i)
|
||||
}
|
||||
|
||||
// nextMultiNorm is used for iterating over multi-segment decompositions
|
||||
// for composing normal forms.
|
||||
func nextMultiNorm(i *Iter) []byte {
|
||||
j := 0
|
||||
d := i.multiSeg
|
||||
for j < len(d) {
|
||||
info := i.rb.f.info(input{bytes: d}, j)
|
||||
if info.BoundaryBefore() {
|
||||
i.rb.compose()
|
||||
seg := i.buf[:i.rb.flushCopy(i.buf[:])]
|
||||
i.rb.insertUnsafe(input{bytes: d}, j, info)
|
||||
i.multiSeg = d[j+int(info.size):]
|
||||
return seg
|
||||
}
|
||||
i.rb.insertUnsafe(input{bytes: d}, j, info)
|
||||
j += int(info.size)
|
||||
}
|
||||
i.multiSeg = nil
|
||||
i.next = nextComposed
|
||||
return doNormComposed(i)
|
||||
}
|
||||
|
||||
// nextDecomposed is the implementation of Next for forms NFD and NFKD.
|
||||
func nextDecomposed(i *Iter) (next []byte) {
|
||||
outp := 0
|
||||
inCopyStart, outCopyStart := i.p, 0
|
||||
for {
|
||||
if sz := int(i.info.size); sz <= 1 {
|
||||
i.rb.ss = 0
|
||||
p := i.p
|
||||
i.p++ // ASCII or illegal byte. Either way, advance by 1.
|
||||
if i.p >= i.rb.nsrc {
|
||||
i.setDone()
|
||||
return i.returnSlice(p, i.p)
|
||||
} else if i.rb.src._byte(i.p) < utf8.RuneSelf {
|
||||
i.next = i.asciiF
|
||||
return i.returnSlice(p, i.p)
|
||||
}
|
||||
outp++
|
||||
} else if d := i.info.Decomposition(); d != nil {
|
||||
// Note: If leading CCC != 0, then len(d) == 2 and last is also non-zero.
|
||||
// Case 1: there is a leftover to copy. In this case the decomposition
|
||||
// must begin with a modifier and should always be appended.
|
||||
// Case 2: no leftover. Simply return d if followed by a ccc == 0 value.
|
||||
p := outp + len(d)
|
||||
if outp > 0 {
|
||||
i.rb.src.copySlice(i.buf[outCopyStart:], inCopyStart, i.p)
|
||||
// TODO: this condition should not be possible, but we leave it
|
||||
// in for defensive purposes.
|
||||
if p > len(i.buf) {
|
||||
return i.buf[:outp]
|
||||
}
|
||||
} else if i.info.multiSegment() {
|
||||
// outp must be 0 as multi-segment decompositions always
|
||||
// start a new segment.
|
||||
if i.multiSeg == nil {
|
||||
i.multiSeg = d
|
||||
i.next = nextMulti
|
||||
return nextMulti(i)
|
||||
}
|
||||
// We are in the last segment. Treat as normal decomposition.
|
||||
d = i.multiSeg
|
||||
i.multiSeg = nil
|
||||
p = len(d)
|
||||
}
|
||||
prevCC := i.info.tccc
|
||||
if i.p += sz; i.p >= i.rb.nsrc {
|
||||
i.setDone()
|
||||
i.info = Properties{} // Force BoundaryBefore to succeed.
|
||||
} else {
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
}
|
||||
switch i.rb.ss.next(i.info) {
|
||||
case ssOverflow:
|
||||
i.next = nextCGJDecompose
|
||||
fallthrough
|
||||
case ssStarter:
|
||||
if outp > 0 {
|
||||
copy(i.buf[outp:], d)
|
||||
return i.buf[:p]
|
||||
}
|
||||
return d
|
||||
}
|
||||
copy(i.buf[outp:], d)
|
||||
outp = p
|
||||
inCopyStart, outCopyStart = i.p, outp
|
||||
if i.info.ccc < prevCC {
|
||||
goto doNorm
|
||||
}
|
||||
continue
|
||||
} else if r := i.rb.src.hangul(i.p); r != 0 {
|
||||
outp = decomposeHangul(i.buf[:], r)
|
||||
i.p += hangulUTF8Size
|
||||
inCopyStart, outCopyStart = i.p, outp
|
||||
if i.p >= i.rb.nsrc {
|
||||
i.setDone()
|
||||
break
|
||||
} else if i.rb.src.hangul(i.p) != 0 {
|
||||
i.next = nextHangul
|
||||
return i.buf[:outp]
|
||||
}
|
||||
} else {
|
||||
p := outp + sz
|
||||
if p > len(i.buf) {
|
||||
break
|
||||
}
|
||||
outp = p
|
||||
i.p += sz
|
||||
}
|
||||
if i.p >= i.rb.nsrc {
|
||||
i.setDone()
|
||||
break
|
||||
}
|
||||
prevCC := i.info.tccc
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
if v := i.rb.ss.next(i.info); v == ssStarter {
|
||||
break
|
||||
} else if v == ssOverflow {
|
||||
i.next = nextCGJDecompose
|
||||
break
|
||||
}
|
||||
if i.info.ccc < prevCC {
|
||||
goto doNorm
|
||||
}
|
||||
}
|
||||
if outCopyStart == 0 {
|
||||
return i.returnSlice(inCopyStart, i.p)
|
||||
} else if inCopyStart < i.p {
|
||||
i.rb.src.copySlice(i.buf[outCopyStart:], inCopyStart, i.p)
|
||||
}
|
||||
return i.buf[:outp]
|
||||
doNorm:
|
||||
// Insert what we have decomposed so far in the reorderBuffer.
|
||||
// As we will only reorder, there will always be enough room.
|
||||
i.rb.src.copySlice(i.buf[outCopyStart:], inCopyStart, i.p)
|
||||
i.rb.insertDecomposed(i.buf[0:outp])
|
||||
return doNormDecomposed(i)
|
||||
}
|
||||
|
||||
func doNormDecomposed(i *Iter) []byte {
|
||||
for {
|
||||
i.rb.insertUnsafe(i.rb.src, i.p, i.info)
|
||||
if i.p += int(i.info.size); i.p >= i.rb.nsrc {
|
||||
i.setDone()
|
||||
break
|
||||
}
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
if i.info.ccc == 0 {
|
||||
break
|
||||
}
|
||||
if s := i.rb.ss.next(i.info); s == ssOverflow {
|
||||
i.next = nextCGJDecompose
|
||||
break
|
||||
}
|
||||
}
|
||||
// new segment or too many combining characters: exit normalization
|
||||
return i.buf[:i.rb.flushCopy(i.buf[:])]
|
||||
}
|
||||
|
||||
func nextCGJDecompose(i *Iter) []byte {
|
||||
i.rb.ss = 0
|
||||
i.rb.insertCGJ()
|
||||
i.next = nextDecomposed
|
||||
i.rb.ss.first(i.info)
|
||||
buf := doNormDecomposed(i)
|
||||
return buf
|
||||
}
|
||||
|
||||
// nextComposed is the implementation of Next for forms NFC and NFKC.
|
||||
func nextComposed(i *Iter) []byte {
|
||||
outp, startp := 0, i.p
|
||||
var prevCC uint8
|
||||
for {
|
||||
if !i.info.isYesC() {
|
||||
goto doNorm
|
||||
}
|
||||
prevCC = i.info.tccc
|
||||
sz := int(i.info.size)
|
||||
if sz == 0 {
|
||||
sz = 1 // illegal rune: copy byte-by-byte
|
||||
}
|
||||
p := outp + sz
|
||||
if p > len(i.buf) {
|
||||
break
|
||||
}
|
||||
outp = p
|
||||
i.p += sz
|
||||
if i.p >= i.rb.nsrc {
|
||||
i.setDone()
|
||||
break
|
||||
} else if i.rb.src._byte(i.p) < utf8.RuneSelf {
|
||||
i.rb.ss = 0
|
||||
i.next = i.asciiF
|
||||
break
|
||||
}
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
if v := i.rb.ss.next(i.info); v == ssStarter {
|
||||
break
|
||||
} else if v == ssOverflow {
|
||||
i.next = nextCGJCompose
|
||||
break
|
||||
}
|
||||
if i.info.ccc < prevCC {
|
||||
goto doNorm
|
||||
}
|
||||
}
|
||||
return i.returnSlice(startp, i.p)
|
||||
doNorm:
|
||||
// reset to start position
|
||||
i.p = startp
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
i.rb.ss.first(i.info)
|
||||
if i.info.multiSegment() {
|
||||
d := i.info.Decomposition()
|
||||
info := i.rb.f.info(input{bytes: d}, 0)
|
||||
i.rb.insertUnsafe(input{bytes: d}, 0, info)
|
||||
i.multiSeg = d[int(info.size):]
|
||||
i.next = nextMultiNorm
|
||||
return nextMultiNorm(i)
|
||||
}
|
||||
i.rb.ss.first(i.info)
|
||||
i.rb.insertUnsafe(i.rb.src, i.p, i.info)
|
||||
return doNormComposed(i)
|
||||
}
|
||||
|
||||
func doNormComposed(i *Iter) []byte {
|
||||
// First rune should already be inserted.
|
||||
for {
|
||||
if i.p += int(i.info.size); i.p >= i.rb.nsrc {
|
||||
i.setDone()
|
||||
break
|
||||
}
|
||||
i.info = i.rb.f.info(i.rb.src, i.p)
|
||||
if s := i.rb.ss.next(i.info); s == ssStarter {
|
||||
break
|
||||
} else if s == ssOverflow {
|
||||
i.next = nextCGJCompose
|
||||
break
|
||||
}
|
||||
i.rb.insertUnsafe(i.rb.src, i.p, i.info)
|
||||
}
|
||||
i.rb.compose()
|
||||
seg := i.buf[:i.rb.flushCopy(i.buf[:])]
|
||||
return seg
|
||||
}
|
||||
|
||||
func nextCGJCompose(i *Iter) []byte {
|
||||
i.rb.ss = 0 // instead of first
|
||||
i.rb.insertCGJ()
|
||||
i.next = nextComposed
|
||||
// Note that we treat any rune with nLeadingNonStarters > 0 as a non-starter,
|
||||
// even if they are not. This is particularly dubious for U+FF9E and UFF9A.
|
||||
// If we ever change that, insert a check here.
|
||||
i.rb.ss.first(i.info)
|
||||
i.rb.insertUnsafe(i.rb.src, i.p, i.info)
|
||||
return doNormComposed(i)
|
||||
}
|
976
vendor/golang.org/x/text/unicode/norm/maketables.go
generated
vendored
Normal file
976
vendor/golang.org/x/text/unicode/norm/maketables.go
generated
vendored
Normal file
|
@ -0,0 +1,976 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build ignore
|
||||
|
||||
// Normalization table generator.
|
||||
// Data read from the web.
|
||||
// See forminfo.go for a description of the trie values associated with each rune.
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"flag"
|
||||
"fmt"
|
||||
"io"
|
||||
"log"
|
||||
"sort"
|
||||
"strconv"
|
||||
"strings"
|
||||
|
||||
"golang.org/x/text/internal/gen"
|
||||
"golang.org/x/text/internal/triegen"
|
||||
"golang.org/x/text/internal/ucd"
|
||||
)
|
||||
|
||||
func main() {
|
||||
gen.Init()
|
||||
loadUnicodeData()
|
||||
compactCCC()
|
||||
loadCompositionExclusions()
|
||||
completeCharFields(FCanonical)
|
||||
completeCharFields(FCompatibility)
|
||||
computeNonStarterCounts()
|
||||
verifyComputed()
|
||||
printChars()
|
||||
testDerived()
|
||||
printTestdata()
|
||||
makeTables()
|
||||
}
|
||||
|
||||
var (
|
||||
tablelist = flag.String("tables",
|
||||
"all",
|
||||
"comma-separated list of which tables to generate; "+
|
||||
"can be 'decomp', 'recomp', 'info' and 'all'")
|
||||
test = flag.Bool("test",
|
||||
false,
|
||||
"test existing tables against DerivedNormalizationProps and generate test data for regression testing")
|
||||
verbose = flag.Bool("verbose",
|
||||
false,
|
||||
"write data to stdout as it is parsed")
|
||||
)
|
||||
|
||||
const MaxChar = 0x10FFFF // anything above this shouldn't exist
|
||||
|
||||
// Quick Check properties of runes allow us to quickly
|
||||
// determine whether a rune may occur in a normal form.
|
||||
// For a given normal form, a rune may be guaranteed to occur
|
||||
// verbatim (QC=Yes), may or may not combine with another
|
||||
// rune (QC=Maybe), or may not occur (QC=No).
|
||||
type QCResult int
|
||||
|
||||
const (
|
||||
QCUnknown QCResult = iota
|
||||
QCYes
|
||||
QCNo
|
||||
QCMaybe
|
||||
)
|
||||
|
||||
func (r QCResult) String() string {
|
||||
switch r {
|
||||
case QCYes:
|
||||
return "Yes"
|
||||
case QCNo:
|
||||
return "No"
|
||||
case QCMaybe:
|
||||
return "Maybe"
|
||||
}
|
||||
return "***UNKNOWN***"
|
||||
}
|
||||
|
||||
const (
|
||||
FCanonical = iota // NFC or NFD
|
||||
FCompatibility // NFKC or NFKD
|
||||
FNumberOfFormTypes
|
||||
)
|
||||
|
||||
const (
|
||||
MComposed = iota // NFC or NFKC
|
||||
MDecomposed // NFD or NFKD
|
||||
MNumberOfModes
|
||||
)
|
||||
|
||||
// This contains only the properties we're interested in.
|
||||
type Char struct {
|
||||
name string
|
||||
codePoint rune // if zero, this index is not a valid code point.
|
||||
ccc uint8 // canonical combining class
|
||||
origCCC uint8
|
||||
excludeInComp bool // from CompositionExclusions.txt
|
||||
compatDecomp bool // it has a compatibility expansion
|
||||
|
||||
nTrailingNonStarters uint8
|
||||
nLeadingNonStarters uint8 // must be equal to trailing if non-zero
|
||||
|
||||
forms [FNumberOfFormTypes]FormInfo // For FCanonical and FCompatibility
|
||||
|
||||
state State
|
||||
}
|
||||
|
||||
var chars = make([]Char, MaxChar+1)
|
||||
var cccMap = make(map[uint8]uint8)
|
||||
|
||||
func (c Char) String() string {
|
||||
buf := new(bytes.Buffer)
|
||||
|
||||
fmt.Fprintf(buf, "%U [%s]:\n", c.codePoint, c.name)
|
||||
fmt.Fprintf(buf, " ccc: %v\n", c.ccc)
|
||||
fmt.Fprintf(buf, " excludeInComp: %v\n", c.excludeInComp)
|
||||
fmt.Fprintf(buf, " compatDecomp: %v\n", c.compatDecomp)
|
||||
fmt.Fprintf(buf, " state: %v\n", c.state)
|
||||
fmt.Fprintf(buf, " NFC:\n")
|
||||
fmt.Fprint(buf, c.forms[FCanonical])
|
||||
fmt.Fprintf(buf, " NFKC:\n")
|
||||
fmt.Fprint(buf, c.forms[FCompatibility])
|
||||
|
||||
return buf.String()
|
||||
}
|
||||
|
||||
// In UnicodeData.txt, some ranges are marked like this:
|
||||
// 3400;<CJK Ideograph Extension A, First>;Lo;0;L;;;;;N;;;;;
|
||||
// 4DB5;<CJK Ideograph Extension A, Last>;Lo;0;L;;;;;N;;;;;
|
||||
// parseCharacter keeps a state variable indicating the weirdness.
|
||||
type State int
|
||||
|
||||
const (
|
||||
SNormal State = iota // known to be zero for the type
|
||||
SFirst
|
||||
SLast
|
||||
SMissing
|
||||
)
|
||||
|
||||
var lastChar = rune('\u0000')
|
||||
|
||||
func (c Char) isValid() bool {
|
||||
return c.codePoint != 0 && c.state != SMissing
|
||||
}
|
||||
|
||||
type FormInfo struct {
|
||||
quickCheck [MNumberOfModes]QCResult // index: MComposed or MDecomposed
|
||||
verified [MNumberOfModes]bool // index: MComposed or MDecomposed
|
||||
|
||||
combinesForward bool // May combine with rune on the right
|
||||
combinesBackward bool // May combine with rune on the left
|
||||
isOneWay bool // Never appears in result
|
||||
inDecomp bool // Some decompositions result in this char.
|
||||
decomp Decomposition
|
||||
expandedDecomp Decomposition
|
||||
}
|
||||
|
||||
func (f FormInfo) String() string {
|
||||
buf := bytes.NewBuffer(make([]byte, 0))
|
||||
|
||||
fmt.Fprintf(buf, " quickCheck[C]: %v\n", f.quickCheck[MComposed])
|
||||
fmt.Fprintf(buf, " quickCheck[D]: %v\n", f.quickCheck[MDecomposed])
|
||||
fmt.Fprintf(buf, " cmbForward: %v\n", f.combinesForward)
|
||||
fmt.Fprintf(buf, " cmbBackward: %v\n", f.combinesBackward)
|
||||
fmt.Fprintf(buf, " isOneWay: %v\n", f.isOneWay)
|
||||
fmt.Fprintf(buf, " inDecomp: %v\n", f.inDecomp)
|
||||
fmt.Fprintf(buf, " decomposition: %X\n", f.decomp)
|
||||
fmt.Fprintf(buf, " expandedDecomp: %X\n", f.expandedDecomp)
|
||||
|
||||
return buf.String()
|
||||
}
|
||||
|
||||
type Decomposition []rune
|
||||
|
||||
func parseDecomposition(s string, skipfirst bool) (a []rune, err error) {
|
||||
decomp := strings.Split(s, " ")
|
||||
if len(decomp) > 0 && skipfirst {
|
||||
decomp = decomp[1:]
|
||||
}
|
||||
for _, d := range decomp {
|
||||
point, err := strconv.ParseUint(d, 16, 64)
|
||||
if err != nil {
|
||||
return a, err
|
||||
}
|
||||
a = append(a, rune(point))
|
||||
}
|
||||
return a, nil
|
||||
}
|
||||
|
||||
func loadUnicodeData() {
|
||||
f := gen.OpenUCDFile("UnicodeData.txt")
|
||||
defer f.Close()
|
||||
p := ucd.New(f)
|
||||
for p.Next() {
|
||||
r := p.Rune(ucd.CodePoint)
|
||||
char := &chars[r]
|
||||
|
||||
char.ccc = uint8(p.Uint(ucd.CanonicalCombiningClass))
|
||||
decmap := p.String(ucd.DecompMapping)
|
||||
|
||||
exp, err := parseDecomposition(decmap, false)
|
||||
isCompat := false
|
||||
if err != nil {
|
||||
if len(decmap) > 0 {
|
||||
exp, err = parseDecomposition(decmap, true)
|
||||
if err != nil {
|
||||
log.Fatalf(`%U: bad decomp |%v|: "%s"`, r, decmap, err)
|
||||
}
|
||||
isCompat = true
|
||||
}
|
||||
}
|
||||
|
||||
char.name = p.String(ucd.Name)
|
||||
char.codePoint = r
|
||||
char.forms[FCompatibility].decomp = exp
|
||||
if !isCompat {
|
||||
char.forms[FCanonical].decomp = exp
|
||||
} else {
|
||||
char.compatDecomp = true
|
||||
}
|
||||
if len(decmap) > 0 {
|
||||
char.forms[FCompatibility].decomp = exp
|
||||
}
|
||||
}
|
||||
if err := p.Err(); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
||||
|
||||
// compactCCC converts the sparse set of CCC values to a continguous one,
|
||||
// reducing the number of bits needed from 8 to 6.
|
||||
func compactCCC() {
|
||||
m := make(map[uint8]uint8)
|
||||
for i := range chars {
|
||||
c := &chars[i]
|
||||
m[c.ccc] = 0
|
||||
}
|
||||
cccs := []int{}
|
||||
for v, _ := range m {
|
||||
cccs = append(cccs, int(v))
|
||||
}
|
||||
sort.Ints(cccs)
|
||||
for i, c := range cccs {
|
||||
cccMap[uint8(i)] = uint8(c)
|
||||
m[uint8(c)] = uint8(i)
|
||||
}
|
||||
for i := range chars {
|
||||
c := &chars[i]
|
||||
c.origCCC = c.ccc
|
||||
c.ccc = m[c.ccc]
|
||||
}
|
||||
if len(m) >= 1<<6 {
|
||||
log.Fatalf("too many difference CCC values: %d >= 64", len(m))
|
||||
}
|
||||
}
|
||||
|
||||
// CompositionExclusions.txt has form:
|
||||
// 0958 # ...
|
||||
// See http://unicode.org/reports/tr44/ for full explanation
|
||||
func loadCompositionExclusions() {
|
||||
f := gen.OpenUCDFile("CompositionExclusions.txt")
|
||||
defer f.Close()
|
||||
p := ucd.New(f)
|
||||
for p.Next() {
|
||||
c := &chars[p.Rune(0)]
|
||||
if c.excludeInComp {
|
||||
log.Fatalf("%U: Duplicate entry in exclusions.", c.codePoint)
|
||||
}
|
||||
c.excludeInComp = true
|
||||
}
|
||||
if e := p.Err(); e != nil {
|
||||
log.Fatal(e)
|
||||
}
|
||||
}
|
||||
|
||||
// hasCompatDecomp returns true if any of the recursive
|
||||
// decompositions contains a compatibility expansion.
|
||||
// In this case, the character may not occur in NFK*.
|
||||
func hasCompatDecomp(r rune) bool {
|
||||
c := &chars[r]
|
||||
if c.compatDecomp {
|
||||
return true
|
||||
}
|
||||
for _, d := range c.forms[FCompatibility].decomp {
|
||||
if hasCompatDecomp(d) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
// Hangul related constants.
|
||||
const (
|
||||
HangulBase = 0xAC00
|
||||
HangulEnd = 0xD7A4 // hangulBase + Jamo combinations (19 * 21 * 28)
|
||||
|
||||
JamoLBase = 0x1100
|
||||
JamoLEnd = 0x1113
|
||||
JamoVBase = 0x1161
|
||||
JamoVEnd = 0x1176
|
||||
JamoTBase = 0x11A8
|
||||
JamoTEnd = 0x11C3
|
||||
|
||||
JamoLVTCount = 19 * 21 * 28
|
||||
JamoTCount = 28
|
||||
)
|
||||
|
||||
func isHangul(r rune) bool {
|
||||
return HangulBase <= r && r < HangulEnd
|
||||
}
|
||||
|
||||
func isHangulWithoutJamoT(r rune) bool {
|
||||
if !isHangul(r) {
|
||||
return false
|
||||
}
|
||||
r -= HangulBase
|
||||
return r < JamoLVTCount && r%JamoTCount == 0
|
||||
}
|
||||
|
||||
func ccc(r rune) uint8 {
|
||||
return chars[r].ccc
|
||||
}
|
||||
|
||||
// Insert a rune in a buffer, ordered by Canonical Combining Class.
|
||||
func insertOrdered(b Decomposition, r rune) Decomposition {
|
||||
n := len(b)
|
||||
b = append(b, 0)
|
||||
cc := ccc(r)
|
||||
if cc > 0 {
|
||||
// Use bubble sort.
|
||||
for ; n > 0; n-- {
|
||||
if ccc(b[n-1]) <= cc {
|
||||
break
|
||||
}
|
||||
b[n] = b[n-1]
|
||||
}
|
||||
}
|
||||
b[n] = r
|
||||
return b
|
||||
}
|
||||
|
||||
// Recursively decompose.
|
||||
func decomposeRecursive(form int, r rune, d Decomposition) Decomposition {
|
||||
dcomp := chars[r].forms[form].decomp
|
||||
if len(dcomp) == 0 {
|
||||
return insertOrdered(d, r)
|
||||
}
|
||||
for _, c := range dcomp {
|
||||
d = decomposeRecursive(form, c, d)
|
||||
}
|
||||
return d
|
||||
}
|
||||
|
||||
func completeCharFields(form int) {
|
||||
// Phase 0: pre-expand decomposition.
|
||||
for i := range chars {
|
||||
f := &chars[i].forms[form]
|
||||
if len(f.decomp) == 0 {
|
||||
continue
|
||||
}
|
||||
exp := make(Decomposition, 0)
|
||||
for _, c := range f.decomp {
|
||||
exp = decomposeRecursive(form, c, exp)
|
||||
}
|
||||
f.expandedDecomp = exp
|
||||
}
|
||||
|
||||
// Phase 1: composition exclusion, mark decomposition.
|
||||
for i := range chars {
|
||||
c := &chars[i]
|
||||
f := &c.forms[form]
|
||||
|
||||
// Marks script-specific exclusions and version restricted.
|
||||
f.isOneWay = c.excludeInComp
|
||||
|
||||
// Singletons
|
||||
f.isOneWay = f.isOneWay || len(f.decomp) == 1
|
||||
|
||||
// Non-starter decompositions
|
||||
if len(f.decomp) > 1 {
|
||||
chk := c.ccc != 0 || chars[f.decomp[0]].ccc != 0
|
||||
f.isOneWay = f.isOneWay || chk
|
||||
}
|
||||
|
||||
// Runes that decompose into more than two runes.
|
||||
f.isOneWay = f.isOneWay || len(f.decomp) > 2
|
||||
|
||||
if form == FCompatibility {
|
||||
f.isOneWay = f.isOneWay || hasCompatDecomp(c.codePoint)
|
||||
}
|
||||
|
||||
for _, r := range f.decomp {
|
||||
chars[r].forms[form].inDecomp = true
|
||||
}
|
||||
}
|
||||
|
||||
// Phase 2: forward and backward combining.
|
||||
for i := range chars {
|
||||
c := &chars[i]
|
||||
f := &c.forms[form]
|
||||
|
||||
if !f.isOneWay && len(f.decomp) == 2 {
|
||||
f0 := &chars[f.decomp[0]].forms[form]
|
||||
f1 := &chars[f.decomp[1]].forms[form]
|
||||
if !f0.isOneWay {
|
||||
f0.combinesForward = true
|
||||
}
|
||||
if !f1.isOneWay {
|
||||
f1.combinesBackward = true
|
||||
}
|
||||
}
|
||||
if isHangulWithoutJamoT(rune(i)) {
|
||||
f.combinesForward = true
|
||||
}
|
||||
}
|
||||
|
||||
// Phase 3: quick check values.
|
||||
for i := range chars {
|
||||
c := &chars[i]
|
||||
f := &c.forms[form]
|
||||
|
||||
switch {
|
||||
case len(f.decomp) > 0:
|
||||
f.quickCheck[MDecomposed] = QCNo
|
||||
case isHangul(rune(i)):
|
||||
f.quickCheck[MDecomposed] = QCNo
|
||||
default:
|
||||
f.quickCheck[MDecomposed] = QCYes
|
||||
}
|
||||
switch {
|
||||
case f.isOneWay:
|
||||
f.quickCheck[MComposed] = QCNo
|
||||
case (i & 0xffff00) == JamoLBase:
|
||||
f.quickCheck[MComposed] = QCYes
|
||||
if JamoLBase <= i && i < JamoLEnd {
|
||||
f.combinesForward = true
|
||||
}
|
||||
if JamoVBase <= i && i < JamoVEnd {
|
||||
f.quickCheck[MComposed] = QCMaybe
|
||||
f.combinesBackward = true
|
||||
f.combinesForward = true
|
||||
}
|
||||
if JamoTBase <= i && i < JamoTEnd {
|
||||
f.quickCheck[MComposed] = QCMaybe
|
||||
f.combinesBackward = true
|
||||
}
|
||||
case !f.combinesBackward:
|
||||
f.quickCheck[MComposed] = QCYes
|
||||
default:
|
||||
f.quickCheck[MComposed] = QCMaybe
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func computeNonStarterCounts() {
|
||||
// Phase 4: leading and trailing non-starter count
|
||||
for i := range chars {
|
||||
c := &chars[i]
|
||||
|
||||
runes := []rune{rune(i)}
|
||||
// We always use FCompatibility so that the CGJ insertion points do not
|
||||
// change for repeated normalizations with different forms.
|
||||
if exp := c.forms[FCompatibility].expandedDecomp; len(exp) > 0 {
|
||||
runes = exp
|
||||
}
|
||||
// We consider runes that combine backwards to be non-starters for the
|
||||
// purpose of Stream-Safe Text Processing.
|
||||
for _, r := range runes {
|
||||
if cr := &chars[r]; cr.ccc == 0 && !cr.forms[FCompatibility].combinesBackward {
|
||||
break
|
||||
}
|
||||
c.nLeadingNonStarters++
|
||||
}
|
||||
for i := len(runes) - 1; i >= 0; i-- {
|
||||
if cr := &chars[runes[i]]; cr.ccc == 0 && !cr.forms[FCompatibility].combinesBackward {
|
||||
break
|
||||
}
|
||||
c.nTrailingNonStarters++
|
||||
}
|
||||
if c.nTrailingNonStarters > 3 {
|
||||
log.Fatalf("%U: Decomposition with more than 3 (%d) trailing modifiers (%U)", i, c.nTrailingNonStarters, runes)
|
||||
}
|
||||
|
||||
if isHangul(rune(i)) {
|
||||
c.nTrailingNonStarters = 2
|
||||
if isHangulWithoutJamoT(rune(i)) {
|
||||
c.nTrailingNonStarters = 1
|
||||
}
|
||||
}
|
||||
|
||||
if l, t := c.nLeadingNonStarters, c.nTrailingNonStarters; l > 0 && l != t {
|
||||
log.Fatalf("%U: number of leading and trailing non-starters should be equal (%d vs %d)", i, l, t)
|
||||
}
|
||||
if t := c.nTrailingNonStarters; t > 3 {
|
||||
log.Fatalf("%U: number of trailing non-starters is %d > 3", t)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func printBytes(w io.Writer, b []byte, name string) {
|
||||
fmt.Fprintf(w, "// %s: %d bytes\n", name, len(b))
|
||||
fmt.Fprintf(w, "var %s = [...]byte {", name)
|
||||
for i, c := range b {
|
||||
switch {
|
||||
case i%64 == 0:
|
||||
fmt.Fprintf(w, "\n// Bytes %x - %x\n", i, i+63)
|
||||
case i%8 == 0:
|
||||
fmt.Fprintf(w, "\n")
|
||||
}
|
||||
fmt.Fprintf(w, "0x%.2X, ", c)
|
||||
}
|
||||
fmt.Fprint(w, "\n}\n\n")
|
||||
}
|
||||
|
||||
// See forminfo.go for format.
|
||||
func makeEntry(f *FormInfo, c *Char) uint16 {
|
||||
e := uint16(0)
|
||||
if r := c.codePoint; HangulBase <= r && r < HangulEnd {
|
||||
e |= 0x40
|
||||
}
|
||||
if f.combinesForward {
|
||||
e |= 0x20
|
||||
}
|
||||
if f.quickCheck[MDecomposed] == QCNo {
|
||||
e |= 0x4
|
||||
}
|
||||
switch f.quickCheck[MComposed] {
|
||||
case QCYes:
|
||||
case QCNo:
|
||||
e |= 0x10
|
||||
case QCMaybe:
|
||||
e |= 0x18
|
||||
default:
|
||||
log.Fatalf("Illegal quickcheck value %v.", f.quickCheck[MComposed])
|
||||
}
|
||||
e |= uint16(c.nTrailingNonStarters)
|
||||
return e
|
||||
}
|
||||
|
||||
// decompSet keeps track of unique decompositions, grouped by whether
|
||||
// the decomposition is followed by a trailing and/or leading CCC.
|
||||
type decompSet [7]map[string]bool
|
||||
|
||||
const (
|
||||
normalDecomp = iota
|
||||
firstMulti
|
||||
firstCCC
|
||||
endMulti
|
||||
firstLeadingCCC
|
||||
firstCCCZeroExcept
|
||||
firstStarterWithNLead
|
||||
lastDecomp
|
||||
)
|
||||
|
||||
var cname = []string{"firstMulti", "firstCCC", "endMulti", "firstLeadingCCC", "firstCCCZeroExcept", "firstStarterWithNLead", "lastDecomp"}
|
||||
|
||||
func makeDecompSet() decompSet {
|
||||
m := decompSet{}
|
||||
for i := range m {
|
||||
m[i] = make(map[string]bool)
|
||||
}
|
||||
return m
|
||||
}
|
||||
func (m *decompSet) insert(key int, s string) {
|
||||
m[key][s] = true
|
||||
}
|
||||
|
||||
func printCharInfoTables(w io.Writer) int {
|
||||
mkstr := func(r rune, f *FormInfo) (int, string) {
|
||||
d := f.expandedDecomp
|
||||
s := string([]rune(d))
|
||||
if max := 1 << 6; len(s) >= max {
|
||||
const msg = "%U: too many bytes in decomposition: %d >= %d"
|
||||
log.Fatalf(msg, r, len(s), max)
|
||||
}
|
||||
head := uint8(len(s))
|
||||
if f.quickCheck[MComposed] != QCYes {
|
||||
head |= 0x40
|
||||
}
|
||||
if f.combinesForward {
|
||||
head |= 0x80
|
||||
}
|
||||
s = string([]byte{head}) + s
|
||||
|
||||
lccc := ccc(d[0])
|
||||
tccc := ccc(d[len(d)-1])
|
||||
cc := ccc(r)
|
||||
if cc != 0 && lccc == 0 && tccc == 0 {
|
||||
log.Fatalf("%U: trailing and leading ccc are 0 for non-zero ccc %d", r, cc)
|
||||
}
|
||||
if tccc < lccc && lccc != 0 {
|
||||
const msg = "%U: lccc (%d) must be <= tcc (%d)"
|
||||
log.Fatalf(msg, r, lccc, tccc)
|
||||
}
|
||||
index := normalDecomp
|
||||
nTrail := chars[r].nTrailingNonStarters
|
||||
nLead := chars[r].nLeadingNonStarters
|
||||
if tccc > 0 || lccc > 0 || nTrail > 0 {
|
||||
tccc <<= 2
|
||||
tccc |= nTrail
|
||||
s += string([]byte{tccc})
|
||||
index = endMulti
|
||||
for _, r := range d[1:] {
|
||||
if ccc(r) == 0 {
|
||||
index = firstCCC
|
||||
}
|
||||
}
|
||||
if lccc > 0 || nLead > 0 {
|
||||
s += string([]byte{lccc})
|
||||
if index == firstCCC {
|
||||
log.Fatalf("%U: multi-segment decomposition not supported for decompositions with leading CCC != 0", r)
|
||||
}
|
||||
index = firstLeadingCCC
|
||||
}
|
||||
if cc != lccc {
|
||||
if cc != 0 {
|
||||
log.Fatalf("%U: for lccc != ccc, expected ccc to be 0; was %d", r, cc)
|
||||
}
|
||||
index = firstCCCZeroExcept
|
||||
}
|
||||
} else if len(d) > 1 {
|
||||
index = firstMulti
|
||||
}
|
||||
return index, s
|
||||
}
|
||||
|
||||
decompSet := makeDecompSet()
|
||||
const nLeadStr = "\x00\x01" // 0-byte length and tccc with nTrail.
|
||||
decompSet.insert(firstStarterWithNLead, nLeadStr)
|
||||
|
||||
// Store the uniqued decompositions in a byte buffer,
|
||||
// preceded by their byte length.
|
||||
for _, c := range chars {
|
||||
for _, f := range c.forms {
|
||||
if len(f.expandedDecomp) == 0 {
|
||||
continue
|
||||
}
|
||||
if f.combinesBackward {
|
||||
log.Fatalf("%U: combinesBackward and decompose", c.codePoint)
|
||||
}
|
||||
index, s := mkstr(c.codePoint, &f)
|
||||
decompSet.insert(index, s)
|
||||
}
|
||||
}
|
||||
|
||||
decompositions := bytes.NewBuffer(make([]byte, 0, 10000))
|
||||
size := 0
|
||||
positionMap := make(map[string]uint16)
|
||||
decompositions.WriteString("\000")
|
||||
fmt.Fprintln(w, "const (")
|
||||
for i, m := range decompSet {
|
||||
sa := []string{}
|
||||
for s := range m {
|
||||
sa = append(sa, s)
|
||||
}
|
||||
sort.Strings(sa)
|
||||
for _, s := range sa {
|
||||
p := decompositions.Len()
|
||||
decompositions.WriteString(s)
|
||||
positionMap[s] = uint16(p)
|
||||
}
|
||||
if cname[i] != "" {
|
||||
fmt.Fprintf(w, "%s = 0x%X\n", cname[i], decompositions.Len())
|
||||
}
|
||||
}
|
||||
fmt.Fprintln(w, "maxDecomp = 0x8000")
|
||||
fmt.Fprintln(w, ")")
|
||||
b := decompositions.Bytes()
|
||||
printBytes(w, b, "decomps")
|
||||
size += len(b)
|
||||
|
||||
varnames := []string{"nfc", "nfkc"}
|
||||
for i := 0; i < FNumberOfFormTypes; i++ {
|
||||
trie := triegen.NewTrie(varnames[i])
|
||||
|
||||
for r, c := range chars {
|
||||
f := c.forms[i]
|
||||
d := f.expandedDecomp
|
||||
if len(d) != 0 {
|
||||
_, key := mkstr(c.codePoint, &f)
|
||||
trie.Insert(rune(r), uint64(positionMap[key]))
|
||||
if c.ccc != ccc(d[0]) {
|
||||
// We assume the lead ccc of a decomposition !=0 in this case.
|
||||
if ccc(d[0]) == 0 {
|
||||
log.Fatalf("Expected leading CCC to be non-zero; ccc is %d", c.ccc)
|
||||
}
|
||||
}
|
||||
} else if c.nLeadingNonStarters > 0 && len(f.expandedDecomp) == 0 && c.ccc == 0 && !f.combinesBackward {
|
||||
// Handle cases where it can't be detected that the nLead should be equal
|
||||
// to nTrail.
|
||||
trie.Insert(c.codePoint, uint64(positionMap[nLeadStr]))
|
||||
} else if v := makeEntry(&f, &c)<<8 | uint16(c.ccc); v != 0 {
|
||||
trie.Insert(c.codePoint, uint64(0x8000|v))
|
||||
}
|
||||
}
|
||||
sz, err := trie.Gen(w, triegen.Compact(&normCompacter{name: varnames[i]}))
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
size += sz
|
||||
}
|
||||
return size
|
||||
}
|
||||
|
||||
func contains(sa []string, s string) bool {
|
||||
for _, a := range sa {
|
||||
if a == s {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
func makeTables() {
|
||||
w := &bytes.Buffer{}
|
||||
|
||||
size := 0
|
||||
if *tablelist == "" {
|
||||
return
|
||||
}
|
||||
list := strings.Split(*tablelist, ",")
|
||||
if *tablelist == "all" {
|
||||
list = []string{"recomp", "info"}
|
||||
}
|
||||
|
||||
// Compute maximum decomposition size.
|
||||
max := 0
|
||||
for _, c := range chars {
|
||||
if n := len(string(c.forms[FCompatibility].expandedDecomp)); n > max {
|
||||
max = n
|
||||
}
|
||||
}
|
||||
|
||||
fmt.Fprintln(w, "const (")
|
||||
fmt.Fprintln(w, "\t// Version is the Unicode edition from which the tables are derived.")
|
||||
fmt.Fprintf(w, "\tVersion = %q\n", gen.UnicodeVersion())
|
||||
fmt.Fprintln(w)
|
||||
fmt.Fprintln(w, "\t// MaxTransformChunkSize indicates the maximum number of bytes that Transform")
|
||||
fmt.Fprintln(w, "\t// may need to write atomically for any Form. Making a destination buffer at")
|
||||
fmt.Fprintln(w, "\t// least this size ensures that Transform can always make progress and that")
|
||||
fmt.Fprintln(w, "\t// the user does not need to grow the buffer on an ErrShortDst.")
|
||||
fmt.Fprintf(w, "\tMaxTransformChunkSize = %d+maxNonStarters*4\n", len(string(0x034F))+max)
|
||||
fmt.Fprintln(w, ")\n")
|
||||
|
||||
// Print the CCC remap table.
|
||||
size += len(cccMap)
|
||||
fmt.Fprintf(w, "var ccc = [%d]uint8{", len(cccMap))
|
||||
for i := 0; i < len(cccMap); i++ {
|
||||
if i%8 == 0 {
|
||||
fmt.Fprintln(w)
|
||||
}
|
||||
fmt.Fprintf(w, "%3d, ", cccMap[uint8(i)])
|
||||
}
|
||||
fmt.Fprintln(w, "\n}\n")
|
||||
|
||||
if contains(list, "info") {
|
||||
size += printCharInfoTables(w)
|
||||
}
|
||||
|
||||
if contains(list, "recomp") {
|
||||
// Note that we use 32 bit keys, instead of 64 bit.
|
||||
// This clips the bits of three entries, but we know
|
||||
// this won't cause a collision. The compiler will catch
|
||||
// any changes made to UnicodeData.txt that introduces
|
||||
// a collision.
|
||||
// Note that the recomposition map for NFC and NFKC
|
||||
// are identical.
|
||||
|
||||
// Recomposition map
|
||||
nrentries := 0
|
||||
for _, c := range chars {
|
||||
f := c.forms[FCanonical]
|
||||
if !f.isOneWay && len(f.decomp) > 0 {
|
||||
nrentries++
|
||||
}
|
||||
}
|
||||
sz := nrentries * 8
|
||||
size += sz
|
||||
fmt.Fprintf(w, "// recompMap: %d bytes (entries only)\n", sz)
|
||||
fmt.Fprintln(w, "var recompMap = map[uint32]rune{")
|
||||
for i, c := range chars {
|
||||
f := c.forms[FCanonical]
|
||||
d := f.decomp
|
||||
if !f.isOneWay && len(d) > 0 {
|
||||
key := uint32(uint16(d[0]))<<16 + uint32(uint16(d[1]))
|
||||
fmt.Fprintf(w, "0x%.8X: 0x%.4X,\n", key, i)
|
||||
}
|
||||
}
|
||||
fmt.Fprintf(w, "}\n\n")
|
||||
}
|
||||
|
||||
fmt.Fprintf(w, "// Total size of tables: %dKB (%d bytes)\n", (size+512)/1024, size)
|
||||
gen.WriteGoFile("tables.go", "norm", w.Bytes())
|
||||
}
|
||||
|
||||
func printChars() {
|
||||
if *verbose {
|
||||
for _, c := range chars {
|
||||
if !c.isValid() || c.state == SMissing {
|
||||
continue
|
||||
}
|
||||
fmt.Println(c)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// verifyComputed does various consistency tests.
|
||||
func verifyComputed() {
|
||||
for i, c := range chars {
|
||||
for _, f := range c.forms {
|
||||
isNo := (f.quickCheck[MDecomposed] == QCNo)
|
||||
if (len(f.decomp) > 0) != isNo && !isHangul(rune(i)) {
|
||||
log.Fatalf("%U: NF*D QC must be No if rune decomposes", i)
|
||||
}
|
||||
|
||||
isMaybe := f.quickCheck[MComposed] == QCMaybe
|
||||
if f.combinesBackward != isMaybe {
|
||||
log.Fatalf("%U: NF*C QC must be Maybe if combinesBackward", i)
|
||||
}
|
||||
if len(f.decomp) > 0 && f.combinesForward && isMaybe {
|
||||
log.Fatalf("%U: NF*C QC must be Yes or No if combinesForward and decomposes", i)
|
||||
}
|
||||
|
||||
if len(f.expandedDecomp) != 0 {
|
||||
continue
|
||||
}
|
||||
if a, b := c.nLeadingNonStarters > 0, (c.ccc > 0 || f.combinesBackward); a != b {
|
||||
// We accept these runes to be treated differently (it only affects
|
||||
// segment breaking in iteration, most likely on improper use), but
|
||||
// reconsider if more characters are added.
|
||||
// U+FF9E HALFWIDTH KATAKANA VOICED SOUND MARK;Lm;0;L;<narrow> 3099;;;;N;;;;;
|
||||
// U+FF9F HALFWIDTH KATAKANA SEMI-VOICED SOUND MARK;Lm;0;L;<narrow> 309A;;;;N;;;;;
|
||||
// U+3133 HANGUL LETTER KIYEOK-SIOS;Lo;0;L;<compat> 11AA;;;;N;HANGUL LETTER GIYEOG SIOS;;;;
|
||||
// U+318E HANGUL LETTER ARAEAE;Lo;0;L;<compat> 11A1;;;;N;HANGUL LETTER ALAE AE;;;;
|
||||
// U+FFA3 HALFWIDTH HANGUL LETTER KIYEOK-SIOS;Lo;0;L;<narrow> 3133;;;;N;HALFWIDTH HANGUL LETTER GIYEOG SIOS;;;;
|
||||
// U+FFDC HALFWIDTH HANGUL LETTER I;Lo;0;L;<narrow> 3163;;;;N;;;;;
|
||||
if i != 0xFF9E && i != 0xFF9F && !(0x3133 <= i && i <= 0x318E) && !(0xFFA3 <= i && i <= 0xFFDC) {
|
||||
log.Fatalf("%U: nLead was %v; want %v", i, a, b)
|
||||
}
|
||||
}
|
||||
}
|
||||
nfc := c.forms[FCanonical]
|
||||
nfkc := c.forms[FCompatibility]
|
||||
if nfc.combinesBackward != nfkc.combinesBackward {
|
||||
log.Fatalf("%U: Cannot combine combinesBackward\n", c.codePoint)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Use values in DerivedNormalizationProps.txt to compare against the
|
||||
// values we computed.
|
||||
// DerivedNormalizationProps.txt has form:
|
||||
// 00C0..00C5 ; NFD_QC; N # ...
|
||||
// 0374 ; NFD_QC; N # ...
|
||||
// See http://unicode.org/reports/tr44/ for full explanation
|
||||
func testDerived() {
|
||||
f := gen.OpenUCDFile("DerivedNormalizationProps.txt")
|
||||
defer f.Close()
|
||||
p := ucd.New(f)
|
||||
for p.Next() {
|
||||
r := p.Rune(0)
|
||||
c := &chars[r]
|
||||
|
||||
var ftype, mode int
|
||||
qt := p.String(1)
|
||||
switch qt {
|
||||
case "NFC_QC":
|
||||
ftype, mode = FCanonical, MComposed
|
||||
case "NFD_QC":
|
||||
ftype, mode = FCanonical, MDecomposed
|
||||
case "NFKC_QC":
|
||||
ftype, mode = FCompatibility, MComposed
|
||||
case "NFKD_QC":
|
||||
ftype, mode = FCompatibility, MDecomposed
|
||||
default:
|
||||
continue
|
||||
}
|
||||
var qr QCResult
|
||||
switch p.String(2) {
|
||||
case "Y":
|
||||
qr = QCYes
|
||||
case "N":
|
||||
qr = QCNo
|
||||
case "M":
|
||||
qr = QCMaybe
|
||||
default:
|
||||
log.Fatalf(`Unexpected quick check value "%s"`, p.String(2))
|
||||
}
|
||||
if got := c.forms[ftype].quickCheck[mode]; got != qr {
|
||||
log.Printf("%U: FAILED %s (was %v need %v)\n", r, qt, got, qr)
|
||||
}
|
||||
c.forms[ftype].verified[mode] = true
|
||||
}
|
||||
if err := p.Err(); err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
// Any unspecified value must be QCYes. Verify this.
|
||||
for i, c := range chars {
|
||||
for j, fd := range c.forms {
|
||||
for k, qr := range fd.quickCheck {
|
||||
if !fd.verified[k] && qr != QCYes {
|
||||
m := "%U: FAIL F:%d M:%d (was %v need Yes) %s\n"
|
||||
log.Printf(m, i, j, k, qr, c.name)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
var testHeader = `const (
|
||||
Yes = iota
|
||||
No
|
||||
Maybe
|
||||
)
|
||||
|
||||
type formData struct {
|
||||
qc uint8
|
||||
combinesForward bool
|
||||
decomposition string
|
||||
}
|
||||
|
||||
type runeData struct {
|
||||
r rune
|
||||
ccc uint8
|
||||
nLead uint8
|
||||
nTrail uint8
|
||||
f [2]formData // 0: canonical; 1: compatibility
|
||||
}
|
||||
|
||||
func f(qc uint8, cf bool, dec string) [2]formData {
|
||||
return [2]formData{{qc, cf, dec}, {qc, cf, dec}}
|
||||
}
|
||||
|
||||
func g(qc, qck uint8, cf, cfk bool, d, dk string) [2]formData {
|
||||
return [2]formData{{qc, cf, d}, {qck, cfk, dk}}
|
||||
}
|
||||
|
||||
var testData = []runeData{
|
||||
`
|
||||
|
||||
func printTestdata() {
|
||||
type lastInfo struct {
|
||||
ccc uint8
|
||||
nLead uint8
|
||||
nTrail uint8
|
||||
f string
|
||||
}
|
||||
|
||||
last := lastInfo{}
|
||||
w := &bytes.Buffer{}
|
||||
fmt.Fprintf(w, testHeader)
|
||||
for r, c := range chars {
|
||||
f := c.forms[FCanonical]
|
||||
qc, cf, d := f.quickCheck[MComposed], f.combinesForward, string(f.expandedDecomp)
|
||||
f = c.forms[FCompatibility]
|
||||
qck, cfk, dk := f.quickCheck[MComposed], f.combinesForward, string(f.expandedDecomp)
|
||||
s := ""
|
||||
if d == dk && qc == qck && cf == cfk {
|
||||
s = fmt.Sprintf("f(%s, %v, %q)", qc, cf, d)
|
||||
} else {
|
||||
s = fmt.Sprintf("g(%s, %s, %v, %v, %q, %q)", qc, qck, cf, cfk, d, dk)
|
||||
}
|
||||
current := lastInfo{c.ccc, c.nLeadingNonStarters, c.nTrailingNonStarters, s}
|
||||
if last != current {
|
||||
fmt.Fprintf(w, "\t{0x%x, %d, %d, %d, %s},\n", r, c.origCCC, c.nLeadingNonStarters, c.nTrailingNonStarters, s)
|
||||
last = current
|
||||
}
|
||||
}
|
||||
fmt.Fprintln(w, "}")
|
||||
gen.WriteGoFile("data_test.go", "norm", w.Bytes())
|
||||
}
|
609
vendor/golang.org/x/text/unicode/norm/normalize.go
generated
vendored
Normal file
609
vendor/golang.org/x/text/unicode/norm/normalize.go
generated
vendored
Normal file
|
@ -0,0 +1,609 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// Note: the file data_test.go that is generated should not be checked in.
|
||||
//go:generate go run maketables.go triegen.go
|
||||
//go:generate go test -tags test
|
||||
|
||||
// Package norm contains types and functions for normalizing Unicode strings.
|
||||
package norm // import "golang.org/x/text/unicode/norm"
|
||||
|
||||
import (
|
||||
"unicode/utf8"
|
||||
|
||||
"golang.org/x/text/transform"
|
||||
)
|
||||
|
||||
// A Form denotes a canonical representation of Unicode code points.
|
||||
// The Unicode-defined normalization and equivalence forms are:
|
||||
//
|
||||
// NFC Unicode Normalization Form C
|
||||
// NFD Unicode Normalization Form D
|
||||
// NFKC Unicode Normalization Form KC
|
||||
// NFKD Unicode Normalization Form KD
|
||||
//
|
||||
// For a Form f, this documentation uses the notation f(x) to mean
|
||||
// the bytes or string x converted to the given form.
|
||||
// A position n in x is called a boundary if conversion to the form can
|
||||
// proceed independently on both sides:
|
||||
// f(x) == append(f(x[0:n]), f(x[n:])...)
|
||||
//
|
||||
// References: http://unicode.org/reports/tr15/ and
|
||||
// http://unicode.org/notes/tn5/.
|
||||
type Form int
|
||||
|
||||
const (
|
||||
NFC Form = iota
|
||||
NFD
|
||||
NFKC
|
||||
NFKD
|
||||
)
|
||||
|
||||
// Bytes returns f(b). May return b if f(b) = b.
|
||||
func (f Form) Bytes(b []byte) []byte {
|
||||
src := inputBytes(b)
|
||||
ft := formTable[f]
|
||||
n, ok := ft.quickSpan(src, 0, len(b), true)
|
||||
if ok {
|
||||
return b
|
||||
}
|
||||
out := make([]byte, n, len(b))
|
||||
copy(out, b[0:n])
|
||||
rb := reorderBuffer{f: *ft, src: src, nsrc: len(b), out: out, flushF: appendFlush}
|
||||
return doAppendInner(&rb, n)
|
||||
}
|
||||
|
||||
// String returns f(s).
|
||||
func (f Form) String(s string) string {
|
||||
src := inputString(s)
|
||||
ft := formTable[f]
|
||||
n, ok := ft.quickSpan(src, 0, len(s), true)
|
||||
if ok {
|
||||
return s
|
||||
}
|
||||
out := make([]byte, n, len(s))
|
||||
copy(out, s[0:n])
|
||||
rb := reorderBuffer{f: *ft, src: src, nsrc: len(s), out: out, flushF: appendFlush}
|
||||
return string(doAppendInner(&rb, n))
|
||||
}
|
||||
|
||||
// IsNormal returns true if b == f(b).
|
||||
func (f Form) IsNormal(b []byte) bool {
|
||||
src := inputBytes(b)
|
||||
ft := formTable[f]
|
||||
bp, ok := ft.quickSpan(src, 0, len(b), true)
|
||||
if ok {
|
||||
return true
|
||||
}
|
||||
rb := reorderBuffer{f: *ft, src: src, nsrc: len(b)}
|
||||
rb.setFlusher(nil, cmpNormalBytes)
|
||||
for bp < len(b) {
|
||||
rb.out = b[bp:]
|
||||
if bp = decomposeSegment(&rb, bp, true); bp < 0 {
|
||||
return false
|
||||
}
|
||||
bp, _ = rb.f.quickSpan(rb.src, bp, len(b), true)
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
func cmpNormalBytes(rb *reorderBuffer) bool {
|
||||
b := rb.out
|
||||
for i := 0; i < rb.nrune; i++ {
|
||||
info := rb.rune[i]
|
||||
if int(info.size) > len(b) {
|
||||
return false
|
||||
}
|
||||
p := info.pos
|
||||
pe := p + info.size
|
||||
for ; p < pe; p++ {
|
||||
if b[0] != rb.byte[p] {
|
||||
return false
|
||||
}
|
||||
b = b[1:]
|
||||
}
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
// IsNormalString returns true if s == f(s).
|
||||
func (f Form) IsNormalString(s string) bool {
|
||||
src := inputString(s)
|
||||
ft := formTable[f]
|
||||
bp, ok := ft.quickSpan(src, 0, len(s), true)
|
||||
if ok {
|
||||
return true
|
||||
}
|
||||
rb := reorderBuffer{f: *ft, src: src, nsrc: len(s)}
|
||||
rb.setFlusher(nil, func(rb *reorderBuffer) bool {
|
||||
for i := 0; i < rb.nrune; i++ {
|
||||
info := rb.rune[i]
|
||||
if bp+int(info.size) > len(s) {
|
||||
return false
|
||||
}
|
||||
p := info.pos
|
||||
pe := p + info.size
|
||||
for ; p < pe; p++ {
|
||||
if s[bp] != rb.byte[p] {
|
||||
return false
|
||||
}
|
||||
bp++
|
||||
}
|
||||
}
|
||||
return true
|
||||
})
|
||||
for bp < len(s) {
|
||||
if bp = decomposeSegment(&rb, bp, true); bp < 0 {
|
||||
return false
|
||||
}
|
||||
bp, _ = rb.f.quickSpan(rb.src, bp, len(s), true)
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
// patchTail fixes a case where a rune may be incorrectly normalized
|
||||
// if it is followed by illegal continuation bytes. It returns the
|
||||
// patched buffer and whether the decomposition is still in progress.
|
||||
func patchTail(rb *reorderBuffer) bool {
|
||||
info, p := lastRuneStart(&rb.f, rb.out)
|
||||
if p == -1 || info.size == 0 {
|
||||
return true
|
||||
}
|
||||
end := p + int(info.size)
|
||||
extra := len(rb.out) - end
|
||||
if extra > 0 {
|
||||
// Potentially allocating memory. However, this only
|
||||
// happens with ill-formed UTF-8.
|
||||
x := make([]byte, 0)
|
||||
x = append(x, rb.out[len(rb.out)-extra:]...)
|
||||
rb.out = rb.out[:end]
|
||||
decomposeToLastBoundary(rb)
|
||||
rb.doFlush()
|
||||
rb.out = append(rb.out, x...)
|
||||
return false
|
||||
}
|
||||
buf := rb.out[p:]
|
||||
rb.out = rb.out[:p]
|
||||
decomposeToLastBoundary(rb)
|
||||
if s := rb.ss.next(info); s == ssStarter {
|
||||
rb.doFlush()
|
||||
rb.ss.first(info)
|
||||
} else if s == ssOverflow {
|
||||
rb.doFlush()
|
||||
rb.insertCGJ()
|
||||
rb.ss = 0
|
||||
}
|
||||
rb.insertUnsafe(inputBytes(buf), 0, info)
|
||||
return true
|
||||
}
|
||||
|
||||
func appendQuick(rb *reorderBuffer, i int) int {
|
||||
if rb.nsrc == i {
|
||||
return i
|
||||
}
|
||||
end, _ := rb.f.quickSpan(rb.src, i, rb.nsrc, true)
|
||||
rb.out = rb.src.appendSlice(rb.out, i, end)
|
||||
return end
|
||||
}
|
||||
|
||||
// Append returns f(append(out, b...)).
|
||||
// The buffer out must be nil, empty, or equal to f(out).
|
||||
func (f Form) Append(out []byte, src ...byte) []byte {
|
||||
return f.doAppend(out, inputBytes(src), len(src))
|
||||
}
|
||||
|
||||
func (f Form) doAppend(out []byte, src input, n int) []byte {
|
||||
if n == 0 {
|
||||
return out
|
||||
}
|
||||
ft := formTable[f]
|
||||
// Attempt to do a quickSpan first so we can avoid initializing the reorderBuffer.
|
||||
if len(out) == 0 {
|
||||
p, _ := ft.quickSpan(src, 0, n, true)
|
||||
out = src.appendSlice(out, 0, p)
|
||||
if p == n {
|
||||
return out
|
||||
}
|
||||
rb := reorderBuffer{f: *ft, src: src, nsrc: n, out: out, flushF: appendFlush}
|
||||
return doAppendInner(&rb, p)
|
||||
}
|
||||
rb := reorderBuffer{f: *ft, src: src, nsrc: n}
|
||||
return doAppend(&rb, out, 0)
|
||||
}
|
||||
|
||||
func doAppend(rb *reorderBuffer, out []byte, p int) []byte {
|
||||
rb.setFlusher(out, appendFlush)
|
||||
src, n := rb.src, rb.nsrc
|
||||
doMerge := len(out) > 0
|
||||
if q := src.skipContinuationBytes(p); q > p {
|
||||
// Move leading non-starters to destination.
|
||||
rb.out = src.appendSlice(rb.out, p, q)
|
||||
p = q
|
||||
doMerge = patchTail(rb)
|
||||
}
|
||||
fd := &rb.f
|
||||
if doMerge {
|
||||
var info Properties
|
||||
if p < n {
|
||||
info = fd.info(src, p)
|
||||
if !info.BoundaryBefore() || info.nLeadingNonStarters() > 0 {
|
||||
if p == 0 {
|
||||
decomposeToLastBoundary(rb)
|
||||
}
|
||||
p = decomposeSegment(rb, p, true)
|
||||
}
|
||||
}
|
||||
if info.size == 0 {
|
||||
rb.doFlush()
|
||||
// Append incomplete UTF-8 encoding.
|
||||
return src.appendSlice(rb.out, p, n)
|
||||
}
|
||||
if rb.nrune > 0 {
|
||||
return doAppendInner(rb, p)
|
||||
}
|
||||
}
|
||||
p = appendQuick(rb, p)
|
||||
return doAppendInner(rb, p)
|
||||
}
|
||||
|
||||
func doAppendInner(rb *reorderBuffer, p int) []byte {
|
||||
for n := rb.nsrc; p < n; {
|
||||
p = decomposeSegment(rb, p, true)
|
||||
p = appendQuick(rb, p)
|
||||
}
|
||||
return rb.out
|
||||
}
|
||||
|
||||
// AppendString returns f(append(out, []byte(s))).
|
||||
// The buffer out must be nil, empty, or equal to f(out).
|
||||
func (f Form) AppendString(out []byte, src string) []byte {
|
||||
return f.doAppend(out, inputString(src), len(src))
|
||||
}
|
||||
|
||||
// QuickSpan returns a boundary n such that b[0:n] == f(b[0:n]).
|
||||
// It is not guaranteed to return the largest such n.
|
||||
func (f Form) QuickSpan(b []byte) int {
|
||||
n, _ := formTable[f].quickSpan(inputBytes(b), 0, len(b), true)
|
||||
return n
|
||||
}
|
||||
|
||||
// Span implements transform.SpanningTransformer. It returns a boundary n such
|
||||
// that b[0:n] == f(b[0:n]). It is not guaranteed to return the largest such n.
|
||||
func (f Form) Span(b []byte, atEOF bool) (n int, err error) {
|
||||
n, ok := formTable[f].quickSpan(inputBytes(b), 0, len(b), atEOF)
|
||||
if n < len(b) {
|
||||
if !ok {
|
||||
err = transform.ErrEndOfSpan
|
||||
} else {
|
||||
err = transform.ErrShortSrc
|
||||
}
|
||||
}
|
||||
return n, err
|
||||
}
|
||||
|
||||
// SpanString returns a boundary n such that s[0:n] == f(s[0:n]).
|
||||
// It is not guaranteed to return the largest such n.
|
||||
func (f Form) SpanString(s string, atEOF bool) (n int, err error) {
|
||||
n, ok := formTable[f].quickSpan(inputString(s), 0, len(s), atEOF)
|
||||
if n < len(s) {
|
||||
if !ok {
|
||||
err = transform.ErrEndOfSpan
|
||||
} else {
|
||||
err = transform.ErrShortSrc
|
||||
}
|
||||
}
|
||||
return n, err
|
||||
}
|
||||
|
||||
// quickSpan returns a boundary n such that src[0:n] == f(src[0:n]) and
|
||||
// whether any non-normalized parts were found. If atEOF is false, n will
|
||||
// not point past the last segment if this segment might be become
|
||||
// non-normalized by appending other runes.
|
||||
func (f *formInfo) quickSpan(src input, i, end int, atEOF bool) (n int, ok bool) {
|
||||
var lastCC uint8
|
||||
ss := streamSafe(0)
|
||||
lastSegStart := i
|
||||
for n = end; i < n; {
|
||||
if j := src.skipASCII(i, n); i != j {
|
||||
i = j
|
||||
lastSegStart = i - 1
|
||||
lastCC = 0
|
||||
ss = 0
|
||||
continue
|
||||
}
|
||||
info := f.info(src, i)
|
||||
if info.size == 0 {
|
||||
if atEOF {
|
||||
// include incomplete runes
|
||||
return n, true
|
||||
}
|
||||
return lastSegStart, true
|
||||
}
|
||||
// This block needs to be before the next, because it is possible to
|
||||
// have an overflow for runes that are starters (e.g. with U+FF9E).
|
||||
switch ss.next(info) {
|
||||
case ssStarter:
|
||||
lastSegStart = i
|
||||
case ssOverflow:
|
||||
return lastSegStart, false
|
||||
case ssSuccess:
|
||||
if lastCC > info.ccc {
|
||||
return lastSegStart, false
|
||||
}
|
||||
}
|
||||
if f.composing {
|
||||
if !info.isYesC() {
|
||||
break
|
||||
}
|
||||
} else {
|
||||
if !info.isYesD() {
|
||||
break
|
||||
}
|
||||
}
|
||||
lastCC = info.ccc
|
||||
i += int(info.size)
|
||||
}
|
||||
if i == n {
|
||||
if !atEOF {
|
||||
n = lastSegStart
|
||||
}
|
||||
return n, true
|
||||
}
|
||||
return lastSegStart, false
|
||||
}
|
||||
|
||||
// QuickSpanString returns a boundary n such that s[0:n] == f(s[0:n]).
|
||||
// It is not guaranteed to return the largest such n.
|
||||
func (f Form) QuickSpanString(s string) int {
|
||||
n, _ := formTable[f].quickSpan(inputString(s), 0, len(s), true)
|
||||
return n
|
||||
}
|
||||
|
||||
// FirstBoundary returns the position i of the first boundary in b
|
||||
// or -1 if b contains no boundary.
|
||||
func (f Form) FirstBoundary(b []byte) int {
|
||||
return f.firstBoundary(inputBytes(b), len(b))
|
||||
}
|
||||
|
||||
func (f Form) firstBoundary(src input, nsrc int) int {
|
||||
i := src.skipContinuationBytes(0)
|
||||
if i >= nsrc {
|
||||
return -1
|
||||
}
|
||||
fd := formTable[f]
|
||||
ss := streamSafe(0)
|
||||
// We should call ss.first here, but we can't as the first rune is
|
||||
// skipped already. This means FirstBoundary can't really determine
|
||||
// CGJ insertion points correctly. Luckily it doesn't have to.
|
||||
for {
|
||||
info := fd.info(src, i)
|
||||
if info.size == 0 {
|
||||
return -1
|
||||
}
|
||||
if s := ss.next(info); s != ssSuccess {
|
||||
return i
|
||||
}
|
||||
i += int(info.size)
|
||||
if i >= nsrc {
|
||||
if !info.BoundaryAfter() && !ss.isMax() {
|
||||
return -1
|
||||
}
|
||||
return nsrc
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// FirstBoundaryInString returns the position i of the first boundary in s
|
||||
// or -1 if s contains no boundary.
|
||||
func (f Form) FirstBoundaryInString(s string) int {
|
||||
return f.firstBoundary(inputString(s), len(s))
|
||||
}
|
||||
|
||||
// NextBoundary reports the index of the boundary between the first and next
|
||||
// segment in b or -1 if atEOF is false and there are not enough bytes to
|
||||
// determine this boundary.
|
||||
func (f Form) NextBoundary(b []byte, atEOF bool) int {
|
||||
return f.nextBoundary(inputBytes(b), len(b), atEOF)
|
||||
}
|
||||
|
||||
// NextBoundaryInString reports the index of the boundary between the first and
|
||||
// next segment in b or -1 if atEOF is false and there are not enough bytes to
|
||||
// determine this boundary.
|
||||
func (f Form) NextBoundaryInString(s string, atEOF bool) int {
|
||||
return f.nextBoundary(inputString(s), len(s), atEOF)
|
||||
}
|
||||
|
||||
func (f Form) nextBoundary(src input, nsrc int, atEOF bool) int {
|
||||
if nsrc == 0 {
|
||||
if atEOF {
|
||||
return 0
|
||||
}
|
||||
return -1
|
||||
}
|
||||
fd := formTable[f]
|
||||
info := fd.info(src, 0)
|
||||
if info.size == 0 {
|
||||
if atEOF {
|
||||
return 1
|
||||
}
|
||||
return -1
|
||||
}
|
||||
ss := streamSafe(0)
|
||||
ss.first(info)
|
||||
|
||||
for i := int(info.size); i < nsrc; i += int(info.size) {
|
||||
info = fd.info(src, i)
|
||||
if info.size == 0 {
|
||||
if atEOF {
|
||||
return i
|
||||
}
|
||||
return -1
|
||||
}
|
||||
// TODO: Using streamSafe to determine the boundary isn't the same as
|
||||
// using BoundaryBefore. Determine which should be used.
|
||||
if s := ss.next(info); s != ssSuccess {
|
||||
return i
|
||||
}
|
||||
}
|
||||
if !atEOF && !info.BoundaryAfter() && !ss.isMax() {
|
||||
return -1
|
||||
}
|
||||
return nsrc
|
||||
}
|
||||
|
||||
// LastBoundary returns the position i of the last boundary in b
|
||||
// or -1 if b contains no boundary.
|
||||
func (f Form) LastBoundary(b []byte) int {
|
||||
return lastBoundary(formTable[f], b)
|
||||
}
|
||||
|
||||
func lastBoundary(fd *formInfo, b []byte) int {
|
||||
i := len(b)
|
||||
info, p := lastRuneStart(fd, b)
|
||||
if p == -1 {
|
||||
return -1
|
||||
}
|
||||
if info.size == 0 { // ends with incomplete rune
|
||||
if p == 0 { // starts with incomplete rune
|
||||
return -1
|
||||
}
|
||||
i = p
|
||||
info, p = lastRuneStart(fd, b[:i])
|
||||
if p == -1 { // incomplete UTF-8 encoding or non-starter bytes without a starter
|
||||
return i
|
||||
}
|
||||
}
|
||||
if p+int(info.size) != i { // trailing non-starter bytes: illegal UTF-8
|
||||
return i
|
||||
}
|
||||
if info.BoundaryAfter() {
|
||||
return i
|
||||
}
|
||||
ss := streamSafe(0)
|
||||
v := ss.backwards(info)
|
||||
for i = p; i >= 0 && v != ssStarter; i = p {
|
||||
info, p = lastRuneStart(fd, b[:i])
|
||||
if v = ss.backwards(info); v == ssOverflow {
|
||||
break
|
||||
}
|
||||
if p+int(info.size) != i {
|
||||
if p == -1 { // no boundary found
|
||||
return -1
|
||||
}
|
||||
return i // boundary after an illegal UTF-8 encoding
|
||||
}
|
||||
}
|
||||
return i
|
||||
}
|
||||
|
||||
// decomposeSegment scans the first segment in src into rb. It inserts 0x034f
|
||||
// (Grapheme Joiner) when it encounters a sequence of more than 30 non-starters
|
||||
// and returns the number of bytes consumed from src or iShortDst or iShortSrc.
|
||||
func decomposeSegment(rb *reorderBuffer, sp int, atEOF bool) int {
|
||||
// Force one character to be consumed.
|
||||
info := rb.f.info(rb.src, sp)
|
||||
if info.size == 0 {
|
||||
return 0
|
||||
}
|
||||
if s := rb.ss.next(info); s == ssStarter {
|
||||
// TODO: this could be removed if we don't support merging.
|
||||
if rb.nrune > 0 {
|
||||
goto end
|
||||
}
|
||||
} else if s == ssOverflow {
|
||||
rb.insertCGJ()
|
||||
goto end
|
||||
}
|
||||
if err := rb.insertFlush(rb.src, sp, info); err != iSuccess {
|
||||
return int(err)
|
||||
}
|
||||
for {
|
||||
sp += int(info.size)
|
||||
if sp >= rb.nsrc {
|
||||
if !atEOF && !info.BoundaryAfter() {
|
||||
return int(iShortSrc)
|
||||
}
|
||||
break
|
||||
}
|
||||
info = rb.f.info(rb.src, sp)
|
||||
if info.size == 0 {
|
||||
if !atEOF {
|
||||
return int(iShortSrc)
|
||||
}
|
||||
break
|
||||
}
|
||||
if s := rb.ss.next(info); s == ssStarter {
|
||||
break
|
||||
} else if s == ssOverflow {
|
||||
rb.insertCGJ()
|
||||
break
|
||||
}
|
||||
if err := rb.insertFlush(rb.src, sp, info); err != iSuccess {
|
||||
return int(err)
|
||||
}
|
||||
}
|
||||
end:
|
||||
if !rb.doFlush() {
|
||||
return int(iShortDst)
|
||||
}
|
||||
return sp
|
||||
}
|
||||
|
||||
// lastRuneStart returns the runeInfo and position of the last
|
||||
// rune in buf or the zero runeInfo and -1 if no rune was found.
|
||||
func lastRuneStart(fd *formInfo, buf []byte) (Properties, int) {
|
||||
p := len(buf) - 1
|
||||
for ; p >= 0 && !utf8.RuneStart(buf[p]); p-- {
|
||||
}
|
||||
if p < 0 {
|
||||
return Properties{}, -1
|
||||
}
|
||||
return fd.info(inputBytes(buf), p), p
|
||||
}
|
||||
|
||||
// decomposeToLastBoundary finds an open segment at the end of the buffer
|
||||
// and scans it into rb. Returns the buffer minus the last segment.
|
||||
func decomposeToLastBoundary(rb *reorderBuffer) {
|
||||
fd := &rb.f
|
||||
info, i := lastRuneStart(fd, rb.out)
|
||||
if int(info.size) != len(rb.out)-i {
|
||||
// illegal trailing continuation bytes
|
||||
return
|
||||
}
|
||||
if info.BoundaryAfter() {
|
||||
return
|
||||
}
|
||||
var add [maxNonStarters + 1]Properties // stores runeInfo in reverse order
|
||||
padd := 0
|
||||
ss := streamSafe(0)
|
||||
p := len(rb.out)
|
||||
for {
|
||||
add[padd] = info
|
||||
v := ss.backwards(info)
|
||||
if v == ssOverflow {
|
||||
// Note that if we have an overflow, it the string we are appending to
|
||||
// is not correctly normalized. In this case the behavior is undefined.
|
||||
break
|
||||
}
|
||||
padd++
|
||||
p -= int(info.size)
|
||||
if v == ssStarter || p < 0 {
|
||||
break
|
||||
}
|
||||
info, i = lastRuneStart(fd, rb.out[:p])
|
||||
if int(info.size) != p-i {
|
||||
break
|
||||
}
|
||||
}
|
||||
rb.ss = ss
|
||||
// Copy bytes for insertion as we may need to overwrite rb.out.
|
||||
var buf [maxBufferSize * utf8.UTFMax]byte
|
||||
cp := buf[:copy(buf[:], rb.out[p:])]
|
||||
rb.out = rb.out[:p]
|
||||
for padd--; padd >= 0; padd-- {
|
||||
info = add[padd]
|
||||
rb.insertUnsafe(inputBytes(cp), 0, info)
|
||||
cp = cp[info.size:]
|
||||
}
|
||||
}
|
125
vendor/golang.org/x/text/unicode/norm/readwriter.go
generated
vendored
Normal file
125
vendor/golang.org/x/text/unicode/norm/readwriter.go
generated
vendored
Normal file
|
@ -0,0 +1,125 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package norm
|
||||
|
||||
import "io"
|
||||
|
||||
type normWriter struct {
|
||||
rb reorderBuffer
|
||||
w io.Writer
|
||||
buf []byte
|
||||
}
|
||||
|
||||
// Write implements the standard write interface. If the last characters are
|
||||
// not at a normalization boundary, the bytes will be buffered for the next
|
||||
// write. The remaining bytes will be written on close.
|
||||
func (w *normWriter) Write(data []byte) (n int, err error) {
|
||||
// Process data in pieces to keep w.buf size bounded.
|
||||
const chunk = 4000
|
||||
|
||||
for len(data) > 0 {
|
||||
// Normalize into w.buf.
|
||||
m := len(data)
|
||||
if m > chunk {
|
||||
m = chunk
|
||||
}
|
||||
w.rb.src = inputBytes(data[:m])
|
||||
w.rb.nsrc = m
|
||||
w.buf = doAppend(&w.rb, w.buf, 0)
|
||||
data = data[m:]
|
||||
n += m
|
||||
|
||||
// Write out complete prefix, save remainder.
|
||||
// Note that lastBoundary looks back at most 31 runes.
|
||||
i := lastBoundary(&w.rb.f, w.buf)
|
||||
if i == -1 {
|
||||
i = 0
|
||||
}
|
||||
if i > 0 {
|
||||
if _, err = w.w.Write(w.buf[:i]); err != nil {
|
||||
break
|
||||
}
|
||||
bn := copy(w.buf, w.buf[i:])
|
||||
w.buf = w.buf[:bn]
|
||||
}
|
||||
}
|
||||
return n, err
|
||||
}
|
||||
|
||||
// Close forces data that remains in the buffer to be written.
|
||||
func (w *normWriter) Close() error {
|
||||
if len(w.buf) > 0 {
|
||||
_, err := w.w.Write(w.buf)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Writer returns a new writer that implements Write(b)
|
||||
// by writing f(b) to w. The returned writer may use an
|
||||
// an internal buffer to maintain state across Write calls.
|
||||
// Calling its Close method writes any buffered data to w.
|
||||
func (f Form) Writer(w io.Writer) io.WriteCloser {
|
||||
wr := &normWriter{rb: reorderBuffer{}, w: w}
|
||||
wr.rb.init(f, nil)
|
||||
return wr
|
||||
}
|
||||
|
||||
type normReader struct {
|
||||
rb reorderBuffer
|
||||
r io.Reader
|
||||
inbuf []byte
|
||||
outbuf []byte
|
||||
bufStart int
|
||||
lastBoundary int
|
||||
err error
|
||||
}
|
||||
|
||||
// Read implements the standard read interface.
|
||||
func (r *normReader) Read(p []byte) (int, error) {
|
||||
for {
|
||||
if r.lastBoundary-r.bufStart > 0 {
|
||||
n := copy(p, r.outbuf[r.bufStart:r.lastBoundary])
|
||||
r.bufStart += n
|
||||
if r.lastBoundary-r.bufStart > 0 {
|
||||
return n, nil
|
||||
}
|
||||
return n, r.err
|
||||
}
|
||||
if r.err != nil {
|
||||
return 0, r.err
|
||||
}
|
||||
outn := copy(r.outbuf, r.outbuf[r.lastBoundary:])
|
||||
r.outbuf = r.outbuf[0:outn]
|
||||
r.bufStart = 0
|
||||
|
||||
n, err := r.r.Read(r.inbuf)
|
||||
r.rb.src = inputBytes(r.inbuf[0:n])
|
||||
r.rb.nsrc, r.err = n, err
|
||||
if n > 0 {
|
||||
r.outbuf = doAppend(&r.rb, r.outbuf, 0)
|
||||
}
|
||||
if err == io.EOF {
|
||||
r.lastBoundary = len(r.outbuf)
|
||||
} else {
|
||||
r.lastBoundary = lastBoundary(&r.rb.f, r.outbuf)
|
||||
if r.lastBoundary == -1 {
|
||||
r.lastBoundary = 0
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Reader returns a new reader that implements Read
|
||||
// by reading data from r and returning f(data).
|
||||
func (f Form) Reader(r io.Reader) io.Reader {
|
||||
const chunk = 4000
|
||||
buf := make([]byte, chunk)
|
||||
rr := &normReader{rb: reorderBuffer{}, r: r, inbuf: buf}
|
||||
rr.rb.init(f, buf)
|
||||
return rr
|
||||
}
|
7631
vendor/golang.org/x/text/unicode/norm/tables.go
generated
vendored
Normal file
7631
vendor/golang.org/x/text/unicode/norm/tables.go
generated
vendored
Normal file
File diff suppressed because it is too large
Load diff
88
vendor/golang.org/x/text/unicode/norm/transform.go
generated
vendored
Normal file
88
vendor/golang.org/x/text/unicode/norm/transform.go
generated
vendored
Normal file
|
@ -0,0 +1,88 @@
|
|||
// Copyright 2013 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package norm
|
||||
|
||||
import (
|
||||
"unicode/utf8"
|
||||
|
||||
"golang.org/x/text/transform"
|
||||
)
|
||||
|
||||
// Reset implements the Reset method of the transform.Transformer interface.
|
||||
func (Form) Reset() {}
|
||||
|
||||
// Transform implements the Transform method of the transform.Transformer
|
||||
// interface. It may need to write segments of up to MaxSegmentSize at once.
|
||||
// Users should either catch ErrShortDst and allow dst to grow or have dst be at
|
||||
// least of size MaxTransformChunkSize to be guaranteed of progress.
|
||||
func (f Form) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
n := 0
|
||||
// Cap the maximum number of src bytes to check.
|
||||
b := src
|
||||
eof := atEOF
|
||||
if ns := len(dst); ns < len(b) {
|
||||
err = transform.ErrShortDst
|
||||
eof = false
|
||||
b = b[:ns]
|
||||
}
|
||||
i, ok := formTable[f].quickSpan(inputBytes(b), n, len(b), eof)
|
||||
n += copy(dst[n:], b[n:i])
|
||||
if !ok {
|
||||
nDst, nSrc, err = f.transform(dst[n:], src[n:], atEOF)
|
||||
return nDst + n, nSrc + n, err
|
||||
}
|
||||
if n < len(src) && !atEOF {
|
||||
err = transform.ErrShortSrc
|
||||
}
|
||||
return n, n, err
|
||||
}
|
||||
|
||||
func flushTransform(rb *reorderBuffer) bool {
|
||||
// Write out (must fully fit in dst, or else it is a ErrShortDst).
|
||||
if len(rb.out) < rb.nrune*utf8.UTFMax {
|
||||
return false
|
||||
}
|
||||
rb.out = rb.out[rb.flushCopy(rb.out):]
|
||||
return true
|
||||
}
|
||||
|
||||
var errs = []error{nil, transform.ErrShortDst, transform.ErrShortSrc}
|
||||
|
||||
// transform implements the transform.Transformer interface. It is only called
|
||||
// when quickSpan does not pass for a given string.
|
||||
func (f Form) transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
|
||||
// TODO: get rid of reorderBuffer. See CL 23460044.
|
||||
rb := reorderBuffer{}
|
||||
rb.init(f, src)
|
||||
for {
|
||||
// Load segment into reorder buffer.
|
||||
rb.setFlusher(dst[nDst:], flushTransform)
|
||||
end := decomposeSegment(&rb, nSrc, atEOF)
|
||||
if end < 0 {
|
||||
return nDst, nSrc, errs[-end]
|
||||
}
|
||||
nDst = len(dst) - len(rb.out)
|
||||
nSrc = end
|
||||
|
||||
// Next quickSpan.
|
||||
end = rb.nsrc
|
||||
eof := atEOF
|
||||
if n := nSrc + len(dst) - nDst; n < end {
|
||||
err = transform.ErrShortDst
|
||||
end = n
|
||||
eof = false
|
||||
}
|
||||
end, ok := rb.f.quickSpan(rb.src, nSrc, end, eof)
|
||||
n := copy(dst[nDst:], rb.src.bytes[nSrc:end])
|
||||
nSrc += n
|
||||
nDst += n
|
||||
if ok {
|
||||
if n < rb.nsrc && !atEOF {
|
||||
err = transform.ErrShortSrc
|
||||
}
|
||||
return nDst, nSrc, err
|
||||
}
|
||||
}
|
||||
}
|
54
vendor/golang.org/x/text/unicode/norm/trie.go
generated
vendored
Normal file
54
vendor/golang.org/x/text/unicode/norm/trie.go
generated
vendored
Normal file
|
@ -0,0 +1,54 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package norm
|
||||
|
||||
type valueRange struct {
|
||||
value uint16 // header: value:stride
|
||||
lo, hi byte // header: lo:n
|
||||
}
|
||||
|
||||
type sparseBlocks struct {
|
||||
values []valueRange
|
||||
offset []uint16
|
||||
}
|
||||
|
||||
var nfcSparse = sparseBlocks{
|
||||
values: nfcSparseValues[:],
|
||||
offset: nfcSparseOffset[:],
|
||||
}
|
||||
|
||||
var nfkcSparse = sparseBlocks{
|
||||
values: nfkcSparseValues[:],
|
||||
offset: nfkcSparseOffset[:],
|
||||
}
|
||||
|
||||
var (
|
||||
nfcData = newNfcTrie(0)
|
||||
nfkcData = newNfkcTrie(0)
|
||||
)
|
||||
|
||||
// lookupValue determines the type of block n and looks up the value for b.
|
||||
// For n < t.cutoff, the block is a simple lookup table. Otherwise, the block
|
||||
// is a list of ranges with an accompanying value. Given a matching range r,
|
||||
// the value for b is by r.value + (b - r.lo) * stride.
|
||||
func (t *sparseBlocks) lookup(n uint32, b byte) uint16 {
|
||||
offset := t.offset[n]
|
||||
header := t.values[offset]
|
||||
lo := offset + 1
|
||||
hi := lo + uint16(header.lo)
|
||||
for lo < hi {
|
||||
m := lo + (hi-lo)/2
|
||||
r := t.values[m]
|
||||
if r.lo <= b && b <= r.hi {
|
||||
return r.value + uint16(b-r.lo)*header.value
|
||||
}
|
||||
if b < r.lo {
|
||||
hi = m
|
||||
} else {
|
||||
lo = m + 1
|
||||
}
|
||||
}
|
||||
return 0
|
||||
}
|
117
vendor/golang.org/x/text/unicode/norm/triegen.go
generated
vendored
Normal file
117
vendor/golang.org/x/text/unicode/norm/triegen.go
generated
vendored
Normal file
|
@ -0,0 +1,117 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build ignore
|
||||
|
||||
// Trie table generator.
|
||||
// Used by make*tables tools to generate a go file with trie data structures
|
||||
// for mapping UTF-8 to a 16-bit value. All but the last byte in a UTF-8 byte
|
||||
// sequence are used to lookup offsets in the index table to be used for the
|
||||
// next byte. The last byte is used to index into a table with 16-bit values.
|
||||
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
)
|
||||
|
||||
const maxSparseEntries = 16
|
||||
|
||||
type normCompacter struct {
|
||||
sparseBlocks [][]uint64
|
||||
sparseOffset []uint16
|
||||
sparseCount int
|
||||
name string
|
||||
}
|
||||
|
||||
func mostFrequentStride(a []uint64) int {
|
||||
counts := make(map[int]int)
|
||||
var v int
|
||||
for _, x := range a {
|
||||
if stride := int(x) - v; v != 0 && stride >= 0 {
|
||||
counts[stride]++
|
||||
}
|
||||
v = int(x)
|
||||
}
|
||||
var maxs, maxc int
|
||||
for stride, cnt := range counts {
|
||||
if cnt > maxc || (cnt == maxc && stride < maxs) {
|
||||
maxs, maxc = stride, cnt
|
||||
}
|
||||
}
|
||||
return maxs
|
||||
}
|
||||
|
||||
func countSparseEntries(a []uint64) int {
|
||||
stride := mostFrequentStride(a)
|
||||
var v, count int
|
||||
for _, tv := range a {
|
||||
if int(tv)-v != stride {
|
||||
if tv != 0 {
|
||||
count++
|
||||
}
|
||||
}
|
||||
v = int(tv)
|
||||
}
|
||||
return count
|
||||
}
|
||||
|
||||
func (c *normCompacter) Size(v []uint64) (sz int, ok bool) {
|
||||
if n := countSparseEntries(v); n <= maxSparseEntries {
|
||||
return (n+1)*4 + 2, true
|
||||
}
|
||||
return 0, false
|
||||
}
|
||||
|
||||
func (c *normCompacter) Store(v []uint64) uint32 {
|
||||
h := uint32(len(c.sparseOffset))
|
||||
c.sparseBlocks = append(c.sparseBlocks, v)
|
||||
c.sparseOffset = append(c.sparseOffset, uint16(c.sparseCount))
|
||||
c.sparseCount += countSparseEntries(v) + 1
|
||||
return h
|
||||
}
|
||||
|
||||
func (c *normCompacter) Handler() string {
|
||||
return c.name + "Sparse.lookup"
|
||||
}
|
||||
|
||||
func (c *normCompacter) Print(w io.Writer) (retErr error) {
|
||||
p := func(f string, x ...interface{}) {
|
||||
if _, err := fmt.Fprintf(w, f, x...); retErr == nil && err != nil {
|
||||
retErr = err
|
||||
}
|
||||
}
|
||||
|
||||
ls := len(c.sparseBlocks)
|
||||
p("// %sSparseOffset: %d entries, %d bytes\n", c.name, ls, ls*2)
|
||||
p("var %sSparseOffset = %#v\n\n", c.name, c.sparseOffset)
|
||||
|
||||
ns := c.sparseCount
|
||||
p("// %sSparseValues: %d entries, %d bytes\n", c.name, ns, ns*4)
|
||||
p("var %sSparseValues = [%d]valueRange {", c.name, ns)
|
||||
for i, b := range c.sparseBlocks {
|
||||
p("\n// Block %#x, offset %#x", i, c.sparseOffset[i])
|
||||
var v int
|
||||
stride := mostFrequentStride(b)
|
||||
n := countSparseEntries(b)
|
||||
p("\n{value:%#04x,lo:%#02x},", stride, uint8(n))
|
||||
for i, nv := range b {
|
||||
if int(nv)-v != stride {
|
||||
if v != 0 {
|
||||
p(",hi:%#02x},", 0x80+i-1)
|
||||
}
|
||||
if nv != 0 {
|
||||
p("\n{value:%#04x,lo:%#02x", nv, 0x80+i)
|
||||
}
|
||||
}
|
||||
v = int(nv)
|
||||
}
|
||||
if v != 0 {
|
||||
p(",hi:%#02x},", 0x80+len(b)-1)
|
||||
}
|
||||
}
|
||||
p("\n}\n\n")
|
||||
return
|
||||
}
|
23
vendor/vendor.json
vendored
23
vendor/vendor.json
vendored
|
@ -1,6 +1,6 @@
|
|||
{
|
||||
"comment": "",
|
||||
"ignore": "test github.com/drone/mq/ github.com/tidwall/redlog/ google.golang.org/appengine/ github.com/syndtr/goleveldb/ github.com/drone/drone-ui/",
|
||||
"ignore": "test github.com/drone/mq/ github.com/tidwall/redlog/ google.golang.org/appengine/ github.com/syndtr/goleveldb/ github.com/drone/drone-ui/ github.com/golang/protobuf/proto github.com/golang/protobuf/ptypes/any golang.org/x/net/context golang.org/x/net/context/ctxhttp",
|
||||
"package": [
|
||||
{
|
||||
"path": "appengine/cloudsql",
|
||||
|
@ -709,11 +709,6 @@
|
|||
"revision": "c7af5bf2638a1164f2eb5467c39c6cffbd13a02e",
|
||||
"revisionTime": "2017-04-25T18:31:00Z"
|
||||
},
|
||||
{
|
||||
"path": "golang.org/x/net/context/ctxhttp",
|
||||
"revision": "fb93926129b8ec0056f2f458b1f519654814edf0",
|
||||
"revisionTime": "2016-04-13T08:48:50+10:00"
|
||||
},
|
||||
{
|
||||
"checksumSHA1": "Oa5JBb27An4MwKwLQ2WMzqRexa8=",
|
||||
"path": "golang.org/x/net/http2",
|
||||
|
@ -792,26 +787,26 @@
|
|||
{
|
||||
"checksumSHA1": "faFDXp++cLjLBlvsr+izZ+go1WU=",
|
||||
"path": "golang.org/x/text/secure/bidirule",
|
||||
"revision": "470f45bf29f4147d6fbd7dfd0a02a848e49f5bf4",
|
||||
"revisionTime": "2017-04-25T18:31:26Z"
|
||||
"revision": "6353ef0f924300eea566d3438817aa4d3374817e",
|
||||
"revisionTime": "2017-06-22T08:56:05Z"
|
||||
},
|
||||
{
|
||||
"checksumSHA1": "ziMb9+ANGRJSSIuxYdRbA+cDRBQ=",
|
||||
"path": "golang.org/x/text/transform",
|
||||
"revision": "470f45bf29f4147d6fbd7dfd0a02a848e49f5bf4",
|
||||
"revisionTime": "2017-04-25T18:31:26Z"
|
||||
"revision": "6353ef0f924300eea566d3438817aa4d3374817e",
|
||||
"revisionTime": "2017-06-22T08:56:05Z"
|
||||
},
|
||||
{
|
||||
"checksumSHA1": "KG+XZAbxdkpBm3Fa3bJ3Ylq8CKI=",
|
||||
"path": "golang.org/x/text/unicode/bidi",
|
||||
"revision": "470f45bf29f4147d6fbd7dfd0a02a848e49f5bf4",
|
||||
"revisionTime": "2017-04-25T18:31:26Z"
|
||||
"revision": "6353ef0f924300eea566d3438817aa4d3374817e",
|
||||
"revisionTime": "2017-06-22T08:56:05Z"
|
||||
},
|
||||
{
|
||||
"checksumSHA1": "Anof4bt0AU+Sa3R8Rq0KBnlpbaQ=",
|
||||
"path": "golang.org/x/text/unicode/norm",
|
||||
"revision": "470f45bf29f4147d6fbd7dfd0a02a848e49f5bf4",
|
||||
"revisionTime": "2017-04-25T18:31:26Z"
|
||||
"revision": "6353ef0f924300eea566d3438817aa4d3374817e",
|
||||
"revisionTime": "2017-06-22T08:56:05Z"
|
||||
},
|
||||
{
|
||||
"checksumSHA1": "AvVpgwhxhJgjoSledwDtYrEKVE4=",
|
||||
|
|
Loading…
Reference in a new issue