122 lines
2.8 KiB
C
122 lines
2.8 KiB
C
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// Copyright (c) 1994, 1997 James Clark
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// See the file COPYING for copying permission.
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#ifndef CharsetInfo_INCLUDED
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#define CharsetInfo_INCLUDED 1
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#ifdef __GNUG__
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#pragma interface
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#endif
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#include <limits.h>
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#include "UnivCharsetDesc.h"
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#include "Boolean.h"
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#include "types.h"
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#include "StringC.h"
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#include "ISet.h"
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#include "CharMap.h"
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#ifdef SP_NAMESPACE
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namespace SP_NAMESPACE {
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#endif
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class SP_API CharsetInfo {
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public:
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CharsetInfo();
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CharsetInfo(const UnivCharsetDesc &);
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inline ~CharsetInfo() {}
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void set(const UnivCharsetDesc &);
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// Use only for characters guaranteed to me in the C basic execution
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// character set and which have been verified to be in this
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// character set.
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Char execToDesc(char) const;
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StringC execToDesc(const char *s) const;
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Boolean descToUniv(WideChar from, UnivChar &to) const;
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Boolean descToUniv(WideChar from, UnivChar &to, WideChar &alsoMax) const;
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// Return 0 for no matches, 1 for 1, 2 for more than 1
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// to gets the first character; toSet gets all the characters
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// if there's more than 1.
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unsigned univToDesc(UnivChar from, WideChar &to, ISet<WideChar> &toSet)
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const;
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unsigned univToDesc(UnivChar from, WideChar &to, ISet<WideChar> &toSet,
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WideChar &count)
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const;
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void getDescSet(ISet<Char> &) const;
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int digitWeight(Char) const;
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int hexDigitWeight(Char) const;
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const UnivCharsetDesc &desc() const;
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private:
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void init();
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UnivCharsetDesc desc_;
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CharMap<Unsigned32> inverse_;
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Char execToDesc_[UCHAR_MAX + 1];
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};
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inline
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unsigned CharsetInfo::univToDesc(UnivChar from, WideChar &to,
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ISet<WideChar> &toSet)
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const
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{
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if (from <= charMax) {
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Unsigned32 n = inverse_[from];
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if (n == Unsigned32(-1))
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return 0;
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if (n != Unsigned32(-2)) {
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to = ((n + from) & ((Unsigned32(1) << 31) - 1));
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return 1;
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}
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}
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return desc_.univToDesc(from, to, toSet);
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}
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inline
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unsigned CharsetInfo::univToDesc(UnivChar from, WideChar &to,
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ISet<WideChar> &toSet, WideChar &count)
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const
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{
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if (from <= charMax) {
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Char fromMax;
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Unsigned32 n = inverse_.getRange(from, fromMax);
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if (n == Unsigned32(-1)) {
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count = (fromMax - from) + 1;
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return 0;
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}
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if (n != Unsigned32(-2)) {
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to = ((n + from) & ((Unsigned32(1) << 31) - 1));
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count = (fromMax - from) + 1;
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return 1;
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}
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}
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return desc_.univToDesc(from, to, toSet, count);
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}
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inline
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Boolean CharsetInfo::descToUniv(UnivChar from, WideChar &to) const
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{
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return desc_.descToUniv(from, to);
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}
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inline
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Char CharsetInfo::execToDesc(char c) const
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{
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return execToDesc_[(unsigned char)c];
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}
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inline
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Boolean CharsetInfo::descToUniv(WideChar from, UnivChar &to,
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WideChar &alsoMax) const
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{
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return desc_.descToUniv(from, to, alsoMax);
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}
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inline
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const UnivCharsetDesc &CharsetInfo::desc() const
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{
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return desc_;
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}
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#ifdef SP_NAMESPACE
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}
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#endif
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#endif /* not CharsetInfo_INCLUDED */
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