src/rewriter/number_compound_util.h

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// This module provides utilities similar to those in base/number_util.h.
// However, this module is separated from it because of the dependency on
// rewriter/counter_suffix.h.

#ifndef MOZC_REWRITER_NUMBER_COMPOUND_UTIL_H_
#define MOZC_REWRITER_NUMBER_COMPOUND_UTIL_H_

#include "base/port.h"
#include "base/string_piece.h"
#include "converter/segments.h"

namespace mozc {

class POSMatcher;
struct CounterSuffixEntry;

namespace number_compound_util {

enum NumberScriptType {
  NONE = 0,
  HALFWIDTH_ARABIC = 1,
  FULLWIDTH_ARABIC = 2,
  KANJI = 4,
  OLD_KANJI = 8,
};

// Splits a string to number and counter suffix if possible.  For example, input
// "一階" can be splitted as "一" + "階".  At the same time, script type of
// number can be obtained.  A sorted array of counter suffix needs to be
// provided, which can be obtained using data manager; see
// data_manager/data_manager_interface.h.  Returns false if the input cannot be
// splitted.
bool SplitStringIntoNumberAndCounterSuffix(
    const CounterSuffixEntry *suffix_array, size_t suffix_array_size,
    StringPiece input, StringPiece *number, StringPiece *counter_suffix,
    uint32 *script_type);

// Checks if the given candidate is number, where candidate is considered as a
// number when satisfying one of the following conditions:
//   1) lid is number
//   2) lid is Kanji number
//   3) lid is general nound and content value consists of number and counter
//      suffix, where counter suffix needs to be provided as a sorted array.
bool IsNumber(const CounterSuffixEntry *suffix_array, size_t suffix_array_size,
              const POSMatcher &pos_matcher, const Segment::Candidate &cand);

}  // namespace number_compound_util
}  // namespace mozc

#endif  // MOZC_REWRITER_NUMBER_COMPOUND_UTIL_H_