128 lines
2.7 KiB
C++
128 lines
2.7 KiB
C++
/*
|
|
* Copyright 2003-2021 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 "Collate.hxx"
|
|
#include "util/AllocatedString.hxx"
|
|
#include "config.h"
|
|
|
|
#ifdef HAVE_ICU
|
|
#include "Util.hxx"
|
|
#include "util/RuntimeError.hxx"
|
|
|
|
#include <unicode/ucol.h>
|
|
#include <unicode/ustring.h>
|
|
#else
|
|
#include <algorithm>
|
|
|
|
#ifndef _WIN32
|
|
#include <string>
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#ifdef _WIN32
|
|
#include "Win32.hxx"
|
|
#include "util/AllocatedString.hxx"
|
|
#include <windows.h>
|
|
#endif
|
|
|
|
#include <cassert>
|
|
#include <memory>
|
|
#include <stdexcept>
|
|
|
|
#include <string.h>
|
|
|
|
#ifdef HAVE_ICU
|
|
static UCollator *collator;
|
|
#endif
|
|
|
|
#ifdef HAVE_ICU
|
|
|
|
void
|
|
IcuCollateInit()
|
|
{
|
|
assert(collator == nullptr);
|
|
|
|
UErrorCode code = U_ZERO_ERROR;
|
|
collator = ucol_open("", &code);
|
|
if (collator == nullptr)
|
|
throw FormatRuntimeError("ucol_open() failed: %s",
|
|
u_errorName(code));
|
|
}
|
|
|
|
void
|
|
IcuCollateFinish() noexcept
|
|
{
|
|
assert(collator != nullptr);
|
|
|
|
ucol_close(collator);
|
|
}
|
|
|
|
#endif
|
|
|
|
[[gnu::pure]]
|
|
int
|
|
IcuCollate(std::string_view a, std::string_view b) noexcept
|
|
{
|
|
#ifdef HAVE_ICU
|
|
assert(collator != nullptr);
|
|
|
|
UErrorCode code = U_ZERO_ERROR;
|
|
return (int)ucol_strcollUTF8(collator, a.data(), a.size(),
|
|
b.data(), b.size(), &code);
|
|
|
|
#elif defined(_WIN32)
|
|
BasicAllocatedString<wchar_t> wa, wb;
|
|
|
|
try {
|
|
wa = MultiByteToWideChar(CP_UTF8, a);
|
|
} catch (...) {
|
|
try {
|
|
wb = MultiByteToWideChar(CP_UTF8, b);
|
|
return -1;
|
|
} catch (...) {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
try {
|
|
wb = MultiByteToWideChar(CP_UTF8, b);
|
|
} catch (...) {
|
|
return 1;
|
|
}
|
|
|
|
auto result = CompareStringEx(LOCALE_NAME_INVARIANT,
|
|
NORM_IGNORECASE,
|
|
wa.c_str(), -1,
|
|
wb.c_str(), -1,
|
|
nullptr, nullptr, 0);
|
|
if (result != 0)
|
|
/* "To maintain the C runtime convention of comparing
|
|
strings, the value 2 can be subtracted from a
|
|
nonzero return value." */
|
|
result -= 2;
|
|
|
|
return result;
|
|
#else
|
|
/* need to duplicate for the fallback because std::string_view
|
|
is not null-terminated */
|
|
return strcoll(std::string(a).c_str(), std::string(b).c_str());
|
|
#endif
|
|
}
|