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107 lines
3.5 KiB
C++
107 lines
3.5 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include <iconv.h>
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#include "common/iconv.h"
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#include "common/str.h"
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#include "common/textconsole.h"
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#include "common/ustr.h"
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namespace Common {
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static const char **getIconvCodesForEncoding(IconvEncoding encoding) {
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static const char *encodingCP932Codes[] = { "cp932", nullptr };
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static const char *encodingCP1250Codes[] = { "cp1250", nullptr };
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static const char *encodingCP1251Codes[] = { "cp1251", nullptr };
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static const char *encodingCP1252Codes[] = { "cp1252", nullptr };
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static const char *encodingCP1255Codes[] = { "cp1255", nullptr };
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// libiconv and glibc-iconv don't use the same name for that encoding, we have to try both
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static const char *encodingMacCentralEuropeCodes[] = { "maccentraleurope", "mac-centraleurope", nullptr };
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switch (encoding) {
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case kEncodingCP932: return encodingCP932Codes;
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case kEncodingCP1250: return encodingCP1250Codes;
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case kEncodingCP1251: return encodingCP1251Codes;
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case kEncodingCP1252: return encodingCP1252Codes;
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case kEncodingCP1255: return encodingCP1255Codes;
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case kEncodingMacCentralEurope: return encodingMacCentralEuropeCodes;
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}
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error("Failed look up iconv codes for encoding '%d'", encoding);
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}
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U32String convertToU32String(IconvEncoding fromEncoding, const String &string) {
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const char **fromCodes = getIconvCodesForEncoding(fromEncoding);
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// Apparently UTF-32 isn't native endian. Also, UCS−4−INTERNAL fails
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// for me.
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static const char *toCode =
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#ifdef SCUMM_BIG_ENDIAN
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"UTF-32BE";
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#else
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"UTF-32LE";
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#endif
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iconv_t handle;
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do {
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handle = iconv_open(toCode, *fromCodes);
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if (handle == (iconv_t)-1) {
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fromCodes++;
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}
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} while (handle == ((iconv_t)-1) && *fromCodes);
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if (handle == ((iconv_t)-1))
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error("Failed to initialize UTF-32 conversion from %d", fromEncoding);
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size_t inSize = string.size();
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size_t outSize = inSize * 4; // Approximation
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size_t originalOutSize = outSize;
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char *buffer = new char[outSize];
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char *dst = buffer;
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#ifdef ICONV_USES_CONST
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const char *src = string.c_str();
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#else
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char *src = const_cast<char *>(string.c_str());
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#endif
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if (iconv(handle, &src, &inSize, &dst, &outSize) == ((size_t)-1))
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error("Failed to convert %s to UTF-32 string", *fromCodes);
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// The conversion descriptor may still contain some state. Write it to the output buffer.
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if (iconv(handle, nullptr, nullptr, &dst, &outSize) == ((size_t)-1))
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error("Failed to convert the remaining state of %s to UTF-32 string", *fromCodes);
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U32String output((const U32String::value_type *)buffer, (originalOutSize - outSize) / 4);
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delete[] buffer;
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iconv_close(handle);
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return output;
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}
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} // End of namespace Common
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