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75513575be
* store dependency's in git * since we vendor ... rm tech-depts * aad make target 'vendor' to update vendor folder (manual task)
85 lines
1.9 KiB
Go
85 lines
1.9 KiB
Go
package json
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import "unicode/utf8"
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// AppendBytes is a mirror of appendString with []byte arg
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func (Encoder) AppendBytes(dst, s []byte) []byte {
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dst = append(dst, '"')
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for i := 0; i < len(s); i++ {
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if !noEscapeTable[s[i]] {
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dst = appendBytesComplex(dst, s, i)
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return append(dst, '"')
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}
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}
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dst = append(dst, s...)
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return append(dst, '"')
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}
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// AppendHex encodes the input bytes to a hex string and appends
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// the encoded string to the input byte slice.
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//
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// The operation loops though each byte and encodes it as hex using
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// the hex lookup table.
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func (Encoder) AppendHex(dst, s []byte) []byte {
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dst = append(dst, '"')
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for _, v := range s {
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dst = append(dst, hex[v>>4], hex[v&0x0f])
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}
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return append(dst, '"')
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}
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// appendBytesComplex is a mirror of the appendStringComplex
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// with []byte arg
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func appendBytesComplex(dst, s []byte, i int) []byte {
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start := 0
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for i < len(s) {
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b := s[i]
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if b >= utf8.RuneSelf {
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r, size := utf8.DecodeRune(s[i:])
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if r == utf8.RuneError && size == 1 {
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if start < i {
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dst = append(dst, s[start:i]...)
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}
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dst = append(dst, `\ufffd`...)
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i += size
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start = i
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continue
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}
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i += size
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continue
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}
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if noEscapeTable[b] {
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i++
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continue
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}
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// We encountered a character that needs to be encoded.
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// Let's append the previous simple characters to the byte slice
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// and switch our operation to read and encode the remainder
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// characters byte-by-byte.
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if start < i {
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dst = append(dst, s[start:i]...)
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}
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switch b {
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case '"', '\\':
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dst = append(dst, '\\', b)
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case '\b':
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dst = append(dst, '\\', 'b')
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case '\f':
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dst = append(dst, '\\', 'f')
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case '\n':
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dst = append(dst, '\\', 'n')
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case '\r':
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dst = append(dst, '\\', 'r')
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case '\t':
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dst = append(dst, '\\', 't')
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default:
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dst = append(dst, '\\', 'u', '0', '0', hex[b>>4], hex[b&0xF])
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}
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i++
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start = i
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}
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if start < len(s) {
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dst = append(dst, s[start:]...)
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}
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return dst
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}
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