content/common/android/address_parser_internal.h

// Copyright (c) 2012 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.

#ifndef CONTENT_COMMON_ADDRESS_PARSER_INTERNAL_H_
#define CONTENT_COMMON_ADDRESS_PARSER_INTERNAL_H_

#include <vector>

#include "base/string_tokenizer.h"

namespace content {

namespace address_parser {

// Internal classes and functions for address parsing.
namespace internal {

struct Word {
  string16::const_iterator begin;
  string16::const_iterator end;

  Word() {}
  Word(const string16::const_iterator& begin,
       const string16::const_iterator& end);
};

class HouseNumberParser {
 public:
  HouseNumberParser() {}

  bool Parse(const string16::const_iterator& begin,
             const string16::const_iterator& end,
             Word* word);

 private:
  static inline bool IsPreDelimiter(char16 character);
  static inline bool IsPostDelimiter(char16 character);
  inline void RestartOnNextDelimiter();

  inline bool CheckFinished(Word* word) const;
  inline void AcceptChars(size_t num_chars);
  inline void SkipChars(size_t num_chars);
  inline void ResetState();

  // Iterators to the beginning, current position and ending of the string
  // being currently parsed.
  string16::const_iterator begin_;
  string16::const_iterator it_;
  string16::const_iterator end_;

  // Number of digits found in the current result candidate.
  size_t num_digits_;

  // Number of characters previous to the current iterator that belong
  // to the current result candidate.
  size_t result_chars_;

  DISALLOW_COPY_AND_ASSIGN(HouseNumberParser);
};

typedef std::vector<Word> WordList;
typedef StringTokenizerT<string16, string16::const_iterator>
    String16Tokenizer;

bool FindStateStartingInWord(WordList* words,
                             size_t state_first_word,
                             size_t* state_last_word,
                             String16Tokenizer* tokenizer,
                             size_t* state_index);

bool IsValidLocationName(const Word& word);
bool IsZipValid(const Word& word, size_t state_index);
bool IsZipValidForState(const Word& word, size_t state_index);

}  // namespace internal

}  // namespace address_parser

}  // namespace content

#endif  // CONTENT_COMMON_ADDRESS_PARSER_INTERNAL_H_