170 lines
3.9 KiB
C++
170 lines
3.9 KiB
C++
/*
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* Copyright (C) 2003-2015 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "Converter.hxx"
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#include "Error.hxx"
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#include "util/Error.hxx"
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#include "util/Macros.hxx"
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#include "util/WritableBuffer.hxx"
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#include "util/ConstBuffer.hxx"
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#include <string.h>
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#ifdef HAVE_ICU
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#include "Util.hxx"
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#include <unicode/ucnv.h>
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#elif defined(HAVE_GLIB)
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#include "util/Domain.hxx"
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static constexpr Domain g_iconv_domain("g_iconv");
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#endif
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#ifdef HAVE_ICU
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IcuConverter::~IcuConverter()
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{
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ucnv_close(converter);
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}
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#endif
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#ifdef HAVE_ICU_CONVERTER
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IcuConverter *
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IcuConverter::Create(const char *charset, Error &error)
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{
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#ifdef HAVE_ICU
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UErrorCode code = U_ZERO_ERROR;
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UConverter *converter = ucnv_open(charset, &code);
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if (converter == nullptr) {
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error.Format(icu_domain, int(code),
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"Failed to initialize charset '%s': %s",
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charset, u_errorName(code));
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return nullptr;
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}
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return new IcuConverter(converter);
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#elif defined(HAVE_GLIB)
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GIConv to = g_iconv_open("utf-8", charset);
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GIConv from = g_iconv_open(charset, "utf-8");
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if (to == (GIConv)-1 || from == (GIConv)-1) {
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if (to != (GIConv)-1)
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g_iconv_close(to);
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if (from != (GIConv)-1)
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g_iconv_close(from);
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error.Format(g_iconv_domain,
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"Failed to initialize charset '%s'", charset);
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return nullptr;
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}
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return new IcuConverter(to, from);
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#endif
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}
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#ifdef HAVE_ICU
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#elif defined(HAVE_GLIB)
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static std::string
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DoConvert(GIConv conv, const char *src)
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{
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// TODO: dynamic buffer?
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char buffer[4096];
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char *in = const_cast<char *>(src);
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char *out = buffer;
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size_t in_left = strlen(src);
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size_t out_left = sizeof(buffer);
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size_t n = g_iconv(conv, &in, &in_left, &out, &out_left);
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if (n == static_cast<size_t>(-1) || in_left > 0)
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return std::string();
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return std::string(buffer, sizeof(buffer) - out_left);
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}
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#endif
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std::string
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IcuConverter::ToUTF8(const char *s) const
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{
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#ifdef HAVE_ICU
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const ScopeLock protect(mutex);
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ucnv_resetToUnicode(converter);
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// TODO: dynamic buffer?
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UChar buffer[4096], *target = buffer;
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const char *source = s;
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UErrorCode code = U_ZERO_ERROR;
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ucnv_toUnicode(converter, &target, buffer + ARRAY_SIZE(buffer),
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&source, source + strlen(source),
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nullptr, true, &code);
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if (code != U_ZERO_ERROR)
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return std::string();
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const size_t target_length = target - buffer;
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const auto u = UCharToUTF8({buffer, target_length});
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if (u.IsNull())
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return std::string();
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std::string result(u.data, u.size);
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delete[] u.data;
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return result;
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#elif defined(HAVE_GLIB)
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return DoConvert(to_utf8, s);
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#endif
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}
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std::string
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IcuConverter::FromUTF8(const char *s) const
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{
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#ifdef HAVE_ICU
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const ScopeLock protect(mutex);
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const auto u = UCharFromUTF8(s);
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if (u.IsNull())
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return std::string();
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ucnv_resetFromUnicode(converter);
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// TODO: dynamic buffer?
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char buffer[4096], *target = buffer;
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const UChar *source = u.data;
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UErrorCode code = U_ZERO_ERROR;
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ucnv_fromUnicode(converter, &target, buffer + ARRAY_SIZE(buffer),
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&source, u.end(),
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nullptr, true, &code);
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delete[] u.data;
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if (code != U_ZERO_ERROR)
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return std::string();
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return std::string(buffer, target);
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#elif defined(HAVE_GLIB)
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return DoConvert(from_utf8, s);
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#endif
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}
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#endif
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