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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef BASE_I18N_STRING_SEARCH_H_
      6 #define BASE_I18N_STRING_SEARCH_H_
      7 
      8 #include "base/i18n/base_i18n_export.h"
      9 #include "base/strings/string16.h"
     10 
     11 struct UStringSearch;
     12 
     13 namespace base {
     14 namespace i18n {
     15 
     16 // Returns true if |in_this| contains |find_this|. If |match_index| or
     17 // |match_length| are non-NULL, they are assigned the start position and total
     18 // length of the match.
     19 //
     20 // Only differences between base letters are taken into consideration. Case and
     21 // accent differences are ignored. Please refer to 'primary level' in
     22 // http://userguide.icu-project.org/collation/concepts for additional details.
     23 BASE_I18N_EXPORT
     24     bool StringSearchIgnoringCaseAndAccents(const string16& find_this,
     25                                             const string16& in_this,
     26                                             size_t* match_index,
     27                                             size_t* match_length);
     28 
     29 // This class is for speeding up multiple StringSearchIgnoringCaseAndAccents()
     30 // with the same |find_this| argument. |find_this| is passed as the constructor
     31 // argument, and precomputation for searching is done only at that timing.
     32 class BASE_I18N_EXPORT FixedPatternStringSearchIgnoringCaseAndAccents {
     33  public:
     34   explicit FixedPatternStringSearchIgnoringCaseAndAccents(
     35       const string16& find_this);
     36   ~FixedPatternStringSearchIgnoringCaseAndAccents();
     37 
     38   // Returns true if |in_this| contains |find_this|. If |match_index| or
     39   // |match_length| are non-NULL, they are assigned the start position and total
     40   // length of the match.
     41   bool Search(const string16& in_this,
     42               size_t* match_index,
     43               size_t* match_length);
     44 
     45  private:
     46   string16 find_this_;
     47   UStringSearch* search_;
     48 };
     49 
     50 }  // namespace i18n
     51 }  // namespace base
     52 
     53 #endif  // BASE_I18N_STRING_SEARCH_H_
     54