+++ /dev/null
-/*
- * Copyright (C) 2008 Jürg Billeter <j@bitron.ch>
- * Copyright (C) 2008 Dominik Röttsches <dominik.roettsches@access-company.com>
- * Copyright (C) 2010 Igalia S.L.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB. If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
-
-#include "config.h"
-#include "UnicodeGLib.h"
-
-#include <wtf/Vector.h>
-#include <wtf/unicode/UTF8.h>
-
-#define UTF8_IS_SURROGATE(character) (character >= 0x10000 && character <= 0x10FFFF)
-
-namespace WTF {
-namespace Unicode {
-
-UChar32 foldCase(UChar32 ch)
-{
- GOwnPtr<GError> gerror;
-
- GOwnPtr<char> utf8char;
- utf8char.set(g_ucs4_to_utf8(reinterpret_cast<gunichar*>(&ch), 1, 0, 0, &gerror.outPtr()));
- if (gerror)
- return ch;
-
- GOwnPtr<char> utf8caseFolded;
- utf8caseFolded.set(g_utf8_casefold(utf8char.get(), -1));
-
- GOwnPtr<gunichar> ucs4Result;
- ucs4Result.set(g_utf8_to_ucs4_fast(utf8caseFolded.get(), -1, 0));
-
- return *ucs4Result;
-}
-
-static int getUTF16LengthFromUTF8(const gchar* utf8String, int length)
-{
- int utf16Length = 0;
- const gchar* inputString = utf8String;
-
- while ((utf8String + length - inputString > 0) && *inputString) {
- gunichar character = g_utf8_get_char(inputString);
-
- utf16Length += UTF8_IS_SURROGATE(character) ? 2 : 1;
- inputString = g_utf8_next_char(inputString);
- }
-
- return utf16Length;
-}
-
-typedef gchar* (*UTF8CaseFunction)(const gchar*, gssize length);
-
-static int convertCase(UChar* result, int resultLength, const UChar* src, int srcLength, bool* error, UTF8CaseFunction caseFunction)
-{
- *error = false;
-
- // Allocate a buffer big enough to hold all the characters.
- Vector<char> buffer(srcLength * 3);
- char* utf8Target = buffer.data();
- const UChar* utf16Source = src;
- ConversionResult conversionResult = convertUTF16ToUTF8(&utf16Source, utf16Source + srcLength, &utf8Target, utf8Target + buffer.size(), true);
- if (conversionResult != conversionOK) {
- *error = true;
- return -1;
- }
- buffer.shrink(utf8Target - buffer.data());
-
- GOwnPtr<char> utf8Result(caseFunction(buffer.data(), buffer.size()));
- long utf8ResultLength = strlen(utf8Result.get());
-
- // Calculate the destination buffer size.
- int realLength = getUTF16LengthFromUTF8(utf8Result.get(), utf8ResultLength);
- if (realLength > resultLength) {
- *error = true;
- return realLength;
- }
-
- // Convert the result to UTF-16.
- UChar* utf16Target = result;
- const char* utf8Source = utf8Result.get();
- conversionResult = convertUTF8ToUTF16(&utf8Source, utf8Source + utf8ResultLength, &utf16Target, utf16Target + resultLength, true);
- long utf16ResultLength = utf16Target - result;
- if (conversionResult != conversionOK)
- *error = true;
-
- return utf16ResultLength <= 0 ? -1 : utf16ResultLength;
-}
-int foldCase(UChar* result, int resultLength, const UChar* src, int srcLength, bool* error)
-{
- return convertCase(result, resultLength, src, srcLength, error, g_utf8_casefold);
-}
-
-int toLower(UChar* result, int resultLength, const UChar* src, int srcLength, bool* error)
-{
- return convertCase(result, resultLength, src, srcLength, error, g_utf8_strdown);
-}
-
-int toUpper(UChar* result, int resultLength, const UChar* src, int srcLength, bool* error)
-{
- return convertCase(result, resultLength, src, srcLength, error, g_utf8_strup);
-}
-
-Direction direction(UChar32 c)
-{
- PangoBidiType type = pango_bidi_type_for_unichar(c);
- switch (type) {
- case PANGO_BIDI_TYPE_L:
- return LeftToRight;
- case PANGO_BIDI_TYPE_R:
- return RightToLeft;
- case PANGO_BIDI_TYPE_AL:
- return RightToLeftArabic;
- case PANGO_BIDI_TYPE_LRE:
- return LeftToRightEmbedding;
- case PANGO_BIDI_TYPE_RLE:
- return RightToLeftEmbedding;
- case PANGO_BIDI_TYPE_LRO:
- return LeftToRightOverride;
- case PANGO_BIDI_TYPE_RLO:
- return RightToLeftOverride;
- case PANGO_BIDI_TYPE_PDF:
- return PopDirectionalFormat;
- case PANGO_BIDI_TYPE_EN:
- return EuropeanNumber;
- case PANGO_BIDI_TYPE_AN:
- return ArabicNumber;
- case PANGO_BIDI_TYPE_ES:
- return EuropeanNumberSeparator;
- case PANGO_BIDI_TYPE_ET:
- return EuropeanNumberTerminator;
- case PANGO_BIDI_TYPE_CS:
- return CommonNumberSeparator;
- case PANGO_BIDI_TYPE_NSM:
- return NonSpacingMark;
- case PANGO_BIDI_TYPE_BN:
- return BoundaryNeutral;
- case PANGO_BIDI_TYPE_B:
- return BlockSeparator;
- case PANGO_BIDI_TYPE_S:
- return SegmentSeparator;
- case PANGO_BIDI_TYPE_WS:
- return WhiteSpaceNeutral;
- default:
- return OtherNeutral;
- }
-}
-
-int umemcasecmp(const UChar* a, const UChar* b, int len)
-{
- GOwnPtr<char> utf8a;
- GOwnPtr<char> utf8b;
-
- utf8a.set(g_utf16_to_utf8(a, len, 0, 0, 0));
- utf8b.set(g_utf16_to_utf8(b, len, 0, 0, 0));
-
- GOwnPtr<char> foldedA;
- GOwnPtr<char> foldedB;
-
- foldedA.set(g_utf8_casefold(utf8a.get(), -1));
- foldedB.set(g_utf8_casefold(utf8b.get(), -1));
-
- // FIXME: umemcasecmp needs to mimic u_memcasecmp of icu
- // from the ICU docs:
- // "Compare two strings case-insensitively using full case folding.
- // his is equivalent to u_strcmp(u_strFoldCase(s1, n, options), u_strFoldCase(s2, n, options))."
- //
- // So it looks like we don't need the full g_utf8_collate here,
- // but really a bitwise comparison of casefolded unicode chars (not utf-8 bytes).
- // As there is no direct equivalent to this icu function in GLib, for now
- // we'll use g_utf8_collate():
-
- return g_utf8_collate(foldedA.get(), foldedB.get());
-}
-
-}
-}
projects / apple / javascriptcore.git / blobdiff