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70553064dd
--HG-- rename : intl/uconv/src/8859-1.uf => intl/uconv/8859-1.uf rename : intl/uconv/src/8859-1.ut => intl/uconv/8859-1.ut rename : intl/uconv/src/cp1252.uf => intl/uconv/cp1252.uf rename : intl/uconv/src/cp1252.ut => intl/uconv/cp1252.ut rename : intl/uconv/src/macroman.uf => intl/uconv/macroman.uf rename : intl/uconv/src/macroman.ut => intl/uconv/macroman.ut rename : intl/uconv/src/nsCP1252ToUnicode.cpp => intl/uconv/nsCP1252ToUnicode.cpp rename : intl/uconv/src/nsCP1252ToUnicode.h => intl/uconv/nsCP1252ToUnicode.h rename : intl/uconv/src/nsConverterInputStream.cpp => intl/uconv/nsConverterInputStream.cpp rename : intl/uconv/src/nsConverterInputStream.h => intl/uconv/nsConverterInputStream.h rename : intl/uconv/src/nsConverterOutputStream.cpp => intl/uconv/nsConverterOutputStream.cpp rename : intl/uconv/src/nsConverterOutputStream.h => intl/uconv/nsConverterOutputStream.h rename : intl/uconv/src/nsISO88591ToUnicode.cpp => intl/uconv/nsISO88591ToUnicode.cpp rename : intl/uconv/src/nsISO88591ToUnicode.h => intl/uconv/nsISO88591ToUnicode.h rename : intl/uconv/src/nsMacRomanToUnicode.cpp => intl/uconv/nsMacRomanToUnicode.cpp rename : intl/uconv/src/nsMacRomanToUnicode.h => intl/uconv/nsMacRomanToUnicode.h rename : intl/uconv/src/nsReplacementToUnicode.cpp => intl/uconv/nsReplacementToUnicode.cpp rename : intl/uconv/src/nsReplacementToUnicode.h => intl/uconv/nsReplacementToUnicode.h rename : intl/uconv/src/nsScriptableUConv.cpp => intl/uconv/nsScriptableUConv.cpp rename : intl/uconv/src/nsScriptableUConv.h => intl/uconv/nsScriptableUConv.h rename : intl/uconv/src/nsTextToSubURI.cpp => intl/uconv/nsTextToSubURI.cpp rename : intl/uconv/src/nsTextToSubURI.h => intl/uconv/nsTextToSubURI.h rename : intl/uconv/src/nsUConvModule.cpp => intl/uconv/nsUConvModule.cpp rename : intl/uconv/src/nsUTF8ConverterService.cpp => intl/uconv/nsUTF8ConverterService.cpp rename : intl/uconv/src/nsUTF8ConverterService.h => intl/uconv/nsUTF8ConverterService.h rename : intl/uconv/src/nsUTF8ToUnicode.cpp => intl/uconv/nsUTF8ToUnicode.cpp rename : intl/uconv/src/nsUTF8ToUnicode.h => intl/uconv/nsUTF8ToUnicode.h rename : intl/uconv/src/nsUTF8ToUnicodeSSE2.cpp => intl/uconv/nsUTF8ToUnicodeSSE2.cpp rename : intl/uconv/src/nsUnicodeToCP1252.cpp => intl/uconv/nsUnicodeToCP1252.cpp rename : intl/uconv/src/nsUnicodeToCP1252.h => intl/uconv/nsUnicodeToCP1252.h rename : intl/uconv/src/nsUnicodeToISO88591.cpp => intl/uconv/nsUnicodeToISO88591.cpp rename : intl/uconv/src/nsUnicodeToISO88591.h => intl/uconv/nsUnicodeToISO88591.h rename : intl/uconv/src/nsUnicodeToMacRoman.cpp => intl/uconv/nsUnicodeToMacRoman.cpp rename : intl/uconv/src/nsUnicodeToMacRoman.h => intl/uconv/nsUnicodeToMacRoman.h rename : intl/uconv/src/nsUnicodeToUTF8.cpp => intl/uconv/nsUnicodeToUTF8.cpp rename : intl/uconv/src/nsUnicodeToUTF8.h => intl/uconv/nsUnicodeToUTF8.h
155 lines
4.7 KiB
C++
155 lines
4.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//----------------------------------------------------------------------
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// Global functions and data [declaration]
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#include "nsUnicodeToUTF8.h"
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NS_IMPL_ISUPPORTS(nsUnicodeToUTF8, nsIUnicodeEncoder)
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//----------------------------------------------------------------------
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// nsUnicodeToUTF8 class [implementation]
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NS_IMETHODIMP nsUnicodeToUTF8::GetMaxLength(const char16_t * aSrc,
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int32_t aSrcLength,
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int32_t * aDestLength)
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{
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// aSrc is interpreted as UTF16, 3 is normally enough.
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// But when previous buffer only contains part of the surrogate pair, we
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// need to complete it here. If the first word in following buffer is not
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// in valid surrogate range, we need to convert the remaining of last buffer
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// to 3 bytes.
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*aDestLength = 3*aSrcLength + 3;
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return NS_OK;
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}
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NS_IMETHODIMP nsUnicodeToUTF8::Convert(const char16_t * aSrc,
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int32_t * aSrcLength,
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char * aDest,
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int32_t * aDestLength)
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{
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const char16_t * src = aSrc;
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const char16_t * srcEnd = aSrc + *aSrcLength;
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char * dest = aDest;
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int32_t destLen = *aDestLength;
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uint32_t n;
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//complete remaining of last conversion
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if (mHighSurrogate) {
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if (src < srcEnd) {
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*aDestLength = 0;
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return NS_OK_UENC_MOREINPUT;
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}
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if (*aDestLength < 4) {
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*aSrcLength = 0;
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*aDestLength = 0;
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return NS_OK_UENC_MOREOUTPUT;
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}
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if (*src < (char16_t)0xdc00 || *src > (char16_t)0xdfff) { //not a pair
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*dest++ = (char)0xef; //replacement character
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*dest++ = (char)0xbf;
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*dest++ = (char)0xbd;
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destLen -= 3;
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} else {
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n = ((mHighSurrogate - (char16_t)0xd800) << 10) +
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(*src - (char16_t)0xdc00) + 0x10000;
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*dest++ = (char)0xf0 | (n >> 18);
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*dest++ = (char)0x80 | ((n >> 12) & 0x3f);
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*dest++ = (char)0x80 | ((n >> 6) & 0x3f);
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*dest++ = (char)0x80 | (n & 0x3f);
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++src;
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destLen -= 4;
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}
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mHighSurrogate = 0;
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}
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while (src < srcEnd) {
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if ( *src <= 0x007f) {
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if (destLen < 1)
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goto error_more_output;
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*dest++ = (char)*src;
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--destLen;
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} else if (*src <= 0x07ff) {
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if (destLen < 2)
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goto error_more_output;
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*dest++ = (char)0xc0 | (*src >> 6);
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*dest++ = (char)0x80 | (*src & 0x003f);
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destLen -= 2;
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} else if (*src >= (char16_t)0xd800 && *src <= (char16_t)0xdfff) {
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if (*src >= (char16_t)0xdc00) { //not a pair
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if (destLen < 3)
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goto error_more_output;
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*dest++ = (char)0xef; //replacement character
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*dest++ = (char)0xbf;
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*dest++ = (char)0xbd;
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destLen -= 3;
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++src;
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continue;
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}
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if ((src+1) >= srcEnd) {
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//we need another surrogate to complete this unicode char
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mHighSurrogate = *src;
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*aDestLength = dest - aDest;
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return NS_OK_UENC_MOREINPUT;
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}
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//handle surrogate
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if (destLen < 4)
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goto error_more_output;
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if (*(src+1) < (char16_t)0xdc00 || *(src+1) > 0xdfff) { //not a pair
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*dest++ = (char)0xef; //replacement character
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*dest++ = (char)0xbf;
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*dest++ = (char)0xbd;
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destLen -= 3;
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} else {
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n = ((*src - (char16_t)0xd800) << 10) + (*(src+1) - (char16_t)0xdc00) + (uint32_t)0x10000;
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*dest++ = (char)0xf0 | (n >> 18);
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*dest++ = (char)0x80 | ((n >> 12) & 0x3f);
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*dest++ = (char)0x80 | ((n >> 6) & 0x3f);
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*dest++ = (char)0x80 | (n & 0x3f);
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destLen -= 4;
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++src;
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}
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} else {
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if (destLen < 3)
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goto error_more_output;
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//treat rest of the character as BMP
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*dest++ = (char)0xe0 | (*src >> 12);
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*dest++ = (char)0x80 | ((*src >> 6) & 0x003f);
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*dest++ = (char)0x80 | (*src & 0x003f);
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destLen -= 3;
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}
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++src;
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}
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*aDestLength = dest - aDest;
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return NS_OK;
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error_more_output:
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*aSrcLength = src - aSrc;
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*aDestLength = dest - aDest;
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return NS_OK_UENC_MOREOUTPUT;
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}
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NS_IMETHODIMP nsUnicodeToUTF8::Finish(char * aDest, int32_t * aDestLength)
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{
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char * dest = aDest;
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if (mHighSurrogate) {
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if (*aDestLength < 3) {
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*aDestLength = 0;
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return NS_OK_UENC_MOREOUTPUT;
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}
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*dest++ = (char)0xef; //replacement character
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*dest++ = (char)0xbf;
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*dest++ = (char)0xbd;
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mHighSurrogate = 0;
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*aDestLength = 3;
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return NS_OK;
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}
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*aDestLength = 0;
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return NS_OK;
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}
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