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