wtf/unicode/glib/UnicodeGLib.cpp

   1 /*
   2  *  Copyright (C) 2008 Jürg Billeter <j@bitron.ch>
   3  *  Copyright (C) 2008 Dominik Röttsches <dominik.roettsches@access-company.com>
   4  *
   5  *  This library is free software; you can redistribute it and/or
   6  *  modify it under the terms of the GNU Library General Public
   7  *  License as published by the Free Software Foundation; either
   8  *  version 2 of the License, or (at your option) any later version.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  Library General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Library General Public License
  16  *  along with this library; see the file COPYING.LIB.  If not, write to
  17  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  *  Boston, MA 02110-1301, USA.
  19  *
  20  */
  21
  22 #include "config.h"
  23 #include "UnicodeGLib.h"
  24
  25 namespace WTF {
  26 namespace Unicode {
  27
  28 UChar32 foldCase(UChar32 ch)
  29 {
  30     GOwnPtr<GError> gerror;
  31
  32     GOwnPtr<char> utf8char;
  33     utf8char.set(g_ucs4_to_utf8(reinterpret_cast<gunichar*>(&ch), 1, 0, 0, &gerror.outPtr()));
  34     if (gerror)
  35         return ch;
  36
  37     GOwnPtr<char> utf8caseFolded;
  38     utf8caseFolded.set(g_utf8_casefold(utf8char.get(), -1));
  39
  40     GOwnPtr<gunichar> ucs4Result;
  41     ucs4Result.set(g_utf8_to_ucs4_fast(utf8caseFolded.get(), -1, 0));
  42
  43     return *ucs4Result;
  44 }
  45
  46 int foldCase(UChar* result, int resultLength, const UChar* src, int srcLength, bool* error)
  47 {
  48     *error = false;
  49     GOwnPtr<GError> gerror;
  50
  51     GOwnPtr<char> utf8src;
  52     utf8src.set(g_utf16_to_utf8(src, srcLength, 0, 0, &gerror.outPtr()));
  53     if (gerror) {
  54         *error = true;
  55         return -1;
  56     }
  57
  58     GOwnPtr<char> utf8result;
  59     utf8result.set(g_utf8_casefold(utf8src.get(), -1));
  60
  61     long utf16resultLength = -1;
  62     GOwnPtr<UChar> utf16result;
  63     utf16result.set(g_utf8_to_utf16(utf8result.get(), -1, 0, &utf16resultLength, &gerror.outPtr()));
  64     if (gerror) {
  65         *error = true;
  66         return -1;
  67     }
  68
  69     if (utf16resultLength > resultLength) {
  70         *error = true;
  71         return utf16resultLength;
  72     }
  73     memcpy(result, utf16result.get(), utf16resultLength * sizeof(UChar));
  74
  75     return utf16resultLength;
  76 }
  77
  78 int toLower(UChar* result, int resultLength, const UChar* src, int srcLength, bool* error)
  79 {
  80     *error = false;
  81     GOwnPtr<GError> gerror;
  82
  83     GOwnPtr<char> utf8src;
  84     utf8src.set(g_utf16_to_utf8(src, srcLength, 0, 0, &gerror.outPtr()));
  85     if (gerror) {
  86         *error = true;
  87         return -1;
  88     }
  89
  90     GOwnPtr<char> utf8result;
  91     utf8result.set(g_utf8_strdown(utf8src.get(), -1));
  92
  93     long utf16resultLength = -1;
  94     GOwnPtr<UChar> utf16result;
  95     utf16result.set(g_utf8_to_utf16(utf8result.get(), -1, 0, &utf16resultLength, &gerror.outPtr()));
  96     if (gerror) {
  97         *error = true;
  98         return -1;
  99     }
 100
 101     if (utf16resultLength > resultLength) {
 102         *error = true;
 103         return utf16resultLength;
 104     }
 105     memcpy(result, utf16result.get(), utf16resultLength * sizeof(UChar));
 106
 107     return utf16resultLength;
 108 }
 109
 110 int toUpper(UChar* result, int resultLength, const UChar* src, int srcLength, bool* error)
 111 {
 112     *error = false;
 113     GOwnPtr<GError> gerror;
 114
 115     GOwnPtr<char> utf8src;
 116     utf8src.set(g_utf16_to_utf8(src, srcLength, 0, 0, &gerror.outPtr()));
 117     if (gerror) {
 118         *error = true;
 119         return -1;
 120     }
 121
 122     GOwnPtr<char> utf8result;
 123     utf8result.set(g_utf8_strup(utf8src.get(), -1));
 124
 125     long utf16resultLength = -1;
 126     GOwnPtr<UChar> utf16result;
 127     utf16result.set(g_utf8_to_utf16(utf8result.get(), -1, 0, &utf16resultLength, &gerror.outPtr()));
 128     if (gerror) {
 129         *error = true;
 130         return -1;
 131     }
 132
 133     if (utf16resultLength > resultLength) {
 134         *error = true;
 135         return utf16resultLength;
 136     }
 137     memcpy(result, utf16result.get(), utf16resultLength * sizeof(UChar));
 138
 139     return utf16resultLength;
 140 }
 141
 142 Direction direction(UChar32 c)
 143 {
 144     PangoBidiType type = pango_bidi_type_for_unichar(c);
 145     switch (type) {
 146     case PANGO_BIDI_TYPE_L:
 147         return LeftToRight;
 148     case PANGO_BIDI_TYPE_R:
 149         return RightToLeft;
 150     case PANGO_BIDI_TYPE_AL:
 151         return RightToLeftArabic;
 152     case PANGO_BIDI_TYPE_LRE:
 153         return LeftToRightEmbedding;
 154     case PANGO_BIDI_TYPE_RLE:
 155         return RightToLeftEmbedding;
 156     case PANGO_BIDI_TYPE_LRO:
 157         return LeftToRightOverride;
 158     case PANGO_BIDI_TYPE_RLO:
 159         return RightToLeftOverride;
 160     case PANGO_BIDI_TYPE_PDF:
 161         return PopDirectionalFormat;
 162     case PANGO_BIDI_TYPE_EN:
 163         return EuropeanNumber;
 164     case PANGO_BIDI_TYPE_AN:
 165         return ArabicNumber;
 166     case PANGO_BIDI_TYPE_ES:
 167         return EuropeanNumberSeparator;
 168     case PANGO_BIDI_TYPE_ET:
 169         return EuropeanNumberTerminator;
 170     case PANGO_BIDI_TYPE_CS:
 171         return CommonNumberSeparator;
 172     case PANGO_BIDI_TYPE_NSM:
 173         return NonSpacingMark;
 174     case PANGO_BIDI_TYPE_BN:
 175         return BoundaryNeutral;
 176     case PANGO_BIDI_TYPE_B:
 177         return BlockSeparator;
 178     case PANGO_BIDI_TYPE_S:
 179         return SegmentSeparator;
 180     case PANGO_BIDI_TYPE_WS:
 181         return WhiteSpaceNeutral;
 182     default:
 183         return OtherNeutral;
 184     }
 185 }
 186
 187 int umemcasecmp(const UChar* a, const UChar* b, int len)
 188 {
 189     GOwnPtr<char> utf8a;
 190     GOwnPtr<char> utf8b;
 191
 192     utf8a.set(g_utf16_to_utf8(a, len, 0, 0, 0));
 193     utf8b.set(g_utf16_to_utf8(b, len, 0, 0, 0));
 194
 195     GOwnPtr<char> foldedA;
 196     GOwnPtr<char> foldedB;
 197
 198     foldedA.set(g_utf8_casefold(utf8a.get(), -1));
 199     foldedB.set(g_utf8_casefold(utf8b.get(), -1));
 200
 201     // FIXME: umemcasecmp needs to mimic u_memcasecmp of icu
 202     // from the ICU docs:
 203     // "Compare two strings case-insensitively using full case folding.
 204     // his is equivalent to u_strcmp(u_strFoldCase(s1, n, options), u_strFoldCase(s2, n, options))."
 205     //
 206     // So it looks like we don't need the full g_utf8_collate here,
 207     // but really a bitwise comparison of casefolded unicode chars (not utf-8 bytes).
 208     // As there is no direct equivalent to this icu function in GLib, for now
 209     // we'll use g_utf8_collate():
 210
 211     return g_utf8_collate(foldedA.get(), foldedB.get());
 212 }
 213
 214 }
 215 }