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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/i18n/string_search.h"
#include "unicode/usearch.h"
namespace {
bool CollationSensitiveStringSearch(const string16& find_this,
const string16& in_this,
UCollationStrength strength) {
UErrorCode status = U_ZERO_ERROR;
UStringSearch* search = usearch_open(find_this.data(), -1, in_this.data(), -1,
uloc_getDefault(), NULL, &status);
// Default to basic substring search if usearch fails. According to
// http://icu-project.org/apiref/icu4c/usearch_8h.html, usearch_open will fail
// if either |find_this| or |in_this| are empty. In either case basic
// substring search will give the correct return value.
if (!U_SUCCESS(status))
return in_this.find(find_this) != string16::npos;
UCollator* collator = usearch_getCollator(search);
ucol_setStrength(collator, strength);
usearch_reset(search);
bool result = usearch_first(search, &status) != USEARCH_DONE;
usearch_close(search);
return result;
}
} // namespace
namespace base {
namespace i18n {
bool StringSearchIgnoringCaseAndAccents(const string16& find_this,
const string16& in_this) {
return CollationSensitiveStringSearch(find_this, in_this, UCOL_PRIMARY);
}
} // namespace i18n
} // namespace base
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