コード例 #1
0
ファイル: _num_get.c プロジェクト: SwgSavior/services
bool _STLP_CALL
_M_read_float(string& __buf, _InputIter& __in, _InputIter& __end, ios_base& __s, _CharT*)
{
  // Create a string, copying characters of the form 
  // [+-]? [0-9]* .? [0-9]* ([eE] [+-]? [0-9]+)?

  bool __digits_before_dot /* = false */;
  bool __digits_after_dot = false;
  bool __ok;

  bool   __grouping_ok = true;

  const ctype<_CharT>& __ct = *(const ctype<_CharT>*)__s._M_ctype_facet();
  const numpunct<_CharT>& __numpunct = *(const numpunct<_CharT>*)__s._M_numpunct_facet();
  const string& __grouping = __s._M_grouping(); // cached copy

  _CharT __dot = __numpunct.decimal_point();
  _CharT __sep = __numpunct.thousands_sep();

  _CharT __digits[10];
  _CharT __xplus;
  _CharT __xminus;

  _CharT __pow_e;
  _CharT __pow_E;

  _Initialize_get_float(__ct, __xplus, __xminus, __pow_e, __pow_E, __digits);

  // Get an optional sign
  __in = __copy_sign(__in, __end, __buf, __xplus, __xminus);

  // Get an optional string of digits.
  if (__grouping.size() != 0)
    __digits_before_dot = __copy_grouped_digits(__in, __end, __buf, __digits,
						__sep, __grouping, __grouping_ok);
  else
    __digits_before_dot = __copy_digits(__in, __end, __buf, __digits);

  // Get an optional decimal point, and an optional string of digits.
  if (__in != __end && *__in == __dot) {
    __buf.push_back('.');
    ++__in;
    __digits_after_dot = __copy_digits(__in, __end, __buf, __digits);
  }

  // There have to be some digits, somewhere.
  __ok = __digits_before_dot || __digits_after_dot;
  
  // Get an optional exponent.
  if (__ok && __in != __end && (*__in == __pow_e || *__in == __pow_E)) {
    __buf.push_back('e');
    ++__in;
    __in = __copy_sign(__in, __end, __buf, __xplus, __xminus);
    __ok = __copy_digits(__in, __end, __buf, __digits);
    // If we have an exponent then the sign 
    // is optional but the digits aren't.
  }
  
  return __ok;
}
コード例 #2
0
_OutputIter _STLP_CALL
_M_do_put_float(_OutputIter __s, ios_base& __f,
                _CharT __fill, _Float __x) {
  __iostring __buf;

  size_t __group_pos = __write_float(__buf, __f.flags(), (int)__f.precision(), __x);
  
  const numpunct<_CharT>& __np = *__STATIC_CAST(const numpunct<_CharT>*, __f._M_numpunct_facet());

  return __put_float(__buf, __s, __f, __fill,
                     __np.decimal_point(), __np.thousands_sep(), 
                     __group_pos, __f._M_grouping());
}
コード例 #3
0
ファイル: _num_get.c プロジェクト: SwgSavior/services
_InputIter _STLP_CALL
_M_do_get_integer(_InputIter& __in, _InputIter& __end, ios_base& __str,
                  ios_base::iostate& __err, _Integer& __val, _CharT* __pc) 
{

#if defined(__HP_aCC) && (__HP_aCC == 1)
  bool _IsSigned = !((_Integer)(-1) > 0);
#else
  typedef typename __bool2type<numeric_limits<_Integer>::is_signed>::_Ret _IsSigned;
#endif

  const numpunct<_CharT>& __numpunct = *(const numpunct<_CharT>*)__str._M_numpunct_facet();
  const string& __grouping = __str._M_grouping(); // cached copy

  const int __base_or_zero = _M_get_base_or_zero(__in, __end, __str, __pc);
  int  __got = __base_or_zero & 1;

  bool __result;

  if (__in == __end) {      // We may have already read a 0.  If so,

    if (__got > 0) {       // the result is 0 even if we're at eof.
      __val = 0;
      __result = true;
    }
    else
      __result = false;    
  } else {

    const bool __negative = __base_or_zero & 2;
    const int __base = __base_or_zero >> 2;

#if defined(__HP_aCC) && (__HP_aCC == 1)
     if (_IsSigned)
       __result = __get_integer(__in, __end, __base,  __val, __got, __negative, __numpunct.thousands_sep(), __grouping, __true_type() );
     else
      __result = __get_integer(__in, __end, __base,  __val, __got, __negative, __numpunct.thousands_sep(), __grouping, __false_type() );
#else
    __result = __get_integer(__in, __end, __base,  __val, __got, __negative, __numpunct.thousands_sep(), __grouping, _IsSigned());
# endif
  }

  __err = __STATIC_CAST(ios_base::iostate, __result ? ios_base::goodbit : ios_base::failbit);

  if (__in == __end)
    __err |= ios_base::eofbit;
  return __in;
}