示例#1
0
文件: _num_get.c 项目: inetra/peers1
bool _STLP_CALL
__copy_grouped_digits(_InputIter& __first, _InputIter __last,
                      __iostring& __v, const _CharT * __digits,
                      _CharT __sep, const string& __grouping,
                      bool& __grouping_ok) {
  bool __ok = false;
  char __group_sizes[64];
  char*__group_sizes_end = __group_sizes;
  char __current_group_size = 0;

  for ( ; __first != __last; ++__first) {
    _CharT __c = *__first;
    bool __tmp = __get_fdigit_or_sep(__c, __sep, __digits);
    if (__tmp) {
      if (__c == ',') {
        *__group_sizes_end++ = __current_group_size;
        __current_group_size = 0;
      }
      else {
        __ok = true;
        __v.push_back((char)__c);
        ++__current_group_size;
      }
    }
    else
      break;
  }

  if (__group_sizes_end != __group_sizes)
    *__group_sizes_end++ = __current_group_size;
  __grouping_ok = __valid_grouping(__group_sizes, __group_sizes_end, __grouping.data(), __grouping.data() + __grouping.size());
  return __ok;
}
示例#2
0
文件: _num_get.c 项目: inetra/peers1
bool _STLP_CALL
__get_integer(_InputIter& __first, _InputIter& __last,
              int __base, _Integer& __val,
              int __got, bool __is_negative, _CharT __separator, const string& __grouping, const __false_type& /*_IsSigned*/) {
  bool __ovflow = false;
  _Integer __result = 0;
  bool __is_group = !__grouping.empty();
  char __group_sizes[64];
  char __current_group_size = 0;
  char* __group_sizes_end = __group_sizes;

  _Integer  __over_base = (numeric_limits<_Integer>::max)() / __STATIC_CAST(_Integer, __base);

  for ( ; __first != __last ; ++__first) {

    const _CharT __c = *__first;

    if (__is_group && __c == __separator) {
      *__group_sizes_end++ = __current_group_size;
      __current_group_size = 0;
      continue;
    }

    int __n = __get_digit_from_table(__c);

    if (__n >= __base)
      break;

    ++__got;
    ++__current_group_size;

    if (__result > __over_base)
      __ovflow = true;  //don't need to keep accumulating
    else {
      _Integer __next = __STATIC_CAST(_Integer, __base * __result + __n);
      if (__result != 0)
        __ovflow = __ovflow || __next <= __result;
        __result = __next;
      }
  }

  if (__is_group && __group_sizes_end != __group_sizes) {
      *__group_sizes_end++ = __current_group_size;
  }

  // fbp : added to not modify value if nothing was read
  if (__got > 0) {
      __val = __ovflow ? (numeric_limits<_Integer>::max)()
                       : (__is_negative ? __STATIC_CAST(_Integer, -__result)
                                        : __result);
  }

  // overflow is being treated as failure
  return ((__got > 0) && !__ovflow) &&
          (__is_group == 0 ||
           __valid_grouping(__group_sizes, __group_sizes_end,
                            __grouping.data(), __grouping.data()+ __grouping.size()));
}
示例#3
0
bool
__get_monetary_value(_InIt& __first, _InIt __last, _OuIt __out_ite,
                     const ctype<_CharT>& _c_type,
                     _CharT __point, int __frac_digits, _CharT __sep,
                     const string& __grouping, bool &__syntax_ok) {
  if (__first == __last || !_c_type.is(ctype_base::digit, *__first))
    return false;

  char __group_sizes[128];
  char* __group_sizes_end = __grouping.empty()? 0 : __group_sizes;
  char   __current_group_size = 0;

  while (__first != __last) {
    if (_c_type.is(ctype_base::digit, *__first)) {
      ++__current_group_size;
      *__out_ite++ = *__first++;
    }
    else if (__group_sizes_end) {
      if (*__first == __sep) {
        *__group_sizes_end++ = __current_group_size;
        __current_group_size = 0;
        ++__first;
      }
      else break;
    }
    else
      break;
  }

  if (__grouping.empty())
    __syntax_ok = true;
  else {
    if (__group_sizes_end != __group_sizes)
      *__group_sizes_end++ = __current_group_size;
    
    __syntax_ok = __valid_grouping(__group_sizes, __group_sizes_end,
                                   __grouping.data(), __grouping.data()+ __grouping.size());  
    
    if (__first == __last || *__first != __point) {
      for (int __digits = 0; __digits != __frac_digits; ++__digits)
        *__out_ite++ = _CharT('0');
      return true; // OK not to have decimal point
    }
  }

  ++__first;

  int __digits = 0;

  while (__first != __last && _c_type.is(ctype_base::digit, *__first)) {
      *__out_ite++ = *__first++;
     ++__digits;
  }

  __syntax_ok = __syntax_ok && (__digits == __frac_digits);

  return true;
}