bool _STLP_CALL
__read_float(__iostring& __buf, _InputIter& __in_ite, _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 = *__STATIC_CAST(const ctype<_CharT>*, __s._M_ctype_facet());
const numpunct<_CharT>& __numpunct = *__STATIC_CAST(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_ite = __copy_sign(__in_ite, __end, __buf, __xplus, __xminus);
// Get an optional string of digits.
if (!__grouping.empty())
__digits_before_dot = __copy_grouped_digits(__in_ite, __end, __buf, __digits,
__sep, __grouping, __grouping_ok);
else
__digits_before_dot = __copy_digits(__in_ite, __end, __buf, __digits);
// Get an optional decimal point, and an optional string of digits.
if (__in_ite != __end && *__in_ite == __dot) {
__buf.push_back('.');
++__in_ite;
__digits_after_dot = __copy_digits(__in_ite, __end, __buf, __digits);
}
// There have to be some digits, somewhere.
__ok = __digits_before_dot || __digits_after_dot;
// Get an optional exponent.
if (__ok && __in_ite != __end && (*__in_ite == __pow_e || *__in_ite == __pow_E)) {
__buf.push_back('e');
++__in_ite;
__in_ite = __copy_sign(__in_ite, __end, __buf, __xplus, __xminus);
__ok = __copy_digits(__in_ite, __end, __buf, __digits);
// If we have an exponent then the sign
// is optional but the digits aren't.
}
return __ok;
}
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;
}
_InputIter _STLP_CALL
__copy_sign(_InputIter __first, _InputIter __last, __iostring& __v,
_CharT __xplus, _CharT __xminus) {
if (__first != __last) {
_CharT __c = *__first;
if (__c == __xplus)
++__first;
else if (__c == __xminus) {
__v.push_back('-');
++__first;
}
}
return __first;
}
bool _STLP_CALL
__copy_digits(_InputIter& __first, _InputIter __last,
__iostring& __v, const _CharT* __digits) {
bool __ok = false;
for ( ; __first != __last; ++__first) {
_CharT __c = *__first;
if (__get_fdigit(__c, __digits)) {
__v.push_back((char)__c);
__ok = true;
}
else
break;
}
return __ok;
}