173 lines
3.5 KiB
C++
173 lines
3.5 KiB
C++
/*
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* Copyright (C) 2003-2014 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 "Collate.hxx"
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#ifdef HAVE_ICU
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#include "Error.hxx"
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#include "util/Error.hxx"
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#include "util/Domain.hxx"
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#include <unicode/ucol.h>
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#include <unicode/ustring.h>
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#elif defined(HAVE_GLIB)
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#include <glib.h>
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#else
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#include <algorithm>
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#include <ctype.h>
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#endif
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#include <assert.h>
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#include <string.h>
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#ifdef HAVE_ICU
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static UCollator *collator;
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#endif
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bool
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IcuCollateInit(Error &error)
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{
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#ifdef HAVE_ICU
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assert(collator == nullptr);
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assert(!error.IsDefined());
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UErrorCode code = U_ZERO_ERROR;
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collator = ucol_open("", &code);
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if (collator == nullptr) {
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error.Format(icu_domain, int(code),
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"ucol_open() failed: %s", u_errorName(code));
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return false;
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}
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#else
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(void)error;
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#endif
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return true;
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}
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void
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IcuCollateFinish()
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{
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#ifdef HAVE_ICU
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assert(collator != nullptr);
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ucol_close(collator);
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#endif
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}
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#ifdef HAVE_ICU
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static UChar *
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UCharFromUTF8(const char *src, int32_t *dest_length)
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{
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assert(src != nullptr);
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const size_t src_length = strlen(src);
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size_t dest_capacity = src_length + 1;
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UChar *dest = new UChar[dest_capacity];
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UErrorCode error_code;
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u_strFromUTF8(dest, dest_capacity,
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dest_length,
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src, src_length,
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&error_code);
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if (U_FAILURE(error_code)) {
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delete[] dest;
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return nullptr;
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}
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return dest;
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}
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#endif
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gcc_pure
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int
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IcuCollate(const char *a, const char *b)
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{
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assert(a != nullptr);
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assert(b != nullptr);
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#ifdef HAVE_ICU
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assert(collator != nullptr);
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#if U_ICU_VERSION_MAJOR_NUM >= 50
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UErrorCode code = U_ZERO_ERROR;
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return (int)ucol_strcollUTF8(collator, a, -1, b, -1, &code);
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#else
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/* fall back to ucol_strcoll() */
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UChar *au = UCharFromUTF8(a, nullptr);
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UChar *bu = UCharFromUTF8(b, nullptr);
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int result = au != nullptr && bu != nullptr
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? (int)ucol_strcoll(collator, au, -1, bu, -1)
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: strcasecmp(a, b);
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delete[] au;
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delete[] bu;
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return result;
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#endif
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#elif defined(HAVE_GLIB)
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return g_utf8_collate(a, b);
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#else
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return strcasecmp(a, b);
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#endif
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}
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std::string
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IcuCaseFold(const char *src)
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{
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#ifdef HAVE_ICU
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assert(collator != nullptr);
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assert(src != nullptr);
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int32_t u_length;
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UChar *u = UCharFromUTF8(src, &u_length);
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if (u == nullptr)
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return std::string(src);
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size_t dest_length = ucol_getSortKey(collator, u, u_length,
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nullptr, 0);
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if (dest_length == 0) {
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delete[] u;
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return std::string(src);
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}
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uint8_t *dest = new uint8_t[dest_length];
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ucol_getSortKey(collator, u, u_length,
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dest, dest_length);
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delete[] u;
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std::string result((const char *)dest);
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delete[] dest;
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#elif defined(HAVE_GLIB)
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char *tmp = g_utf8_casefold(src, -1);
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std::string result(tmp);
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g_free(tmp);
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#else
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std::string result(src);
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std::transform(result.begin(), result.end(), result.begin(), tolower);
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#endif
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return result;
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}
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