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string: add strtod

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Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2023-12-19 12:45:15 +01:00
parent 441a2ae9d5
commit 088dd86d63
1 changed files with 54 additions and 0 deletions
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54
include/stdex/string.hpp
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@ -2066,6 +2066,60 @@ namespace stdex
return strtoui<T>(str, N, end, radix);
}
///
/// Parse string for a floating-point number
///
/// \param[in] str String
/// \param[in] count String code unit count limit
/// \param[out] end On return, count of code units processed
/// \param[in ] locale Stdlib locale used to parse string. Use `NULL` to use locale globally set by `setlocale()`.
///
/// \return Binary floating-point number value
///
inline double strtod(
_In_reads_or_z_opt_(count) const char* str, _In_ size_t count,
_Out_opt_ size_t* end,
_In_opt_ locale_t locale)
{
std::string tmp(str, strnlen(str, count));
char* _end;
double r;
#if _WIN32
r = _strtod_l(tmp.c_str(), &_end, locale);
#else
r = strtod_l(tmp.c_str(), &_end, locale);
#endif
if (end) *end = (size_t)(_end - tmp.c_str());
return r;
}
///
/// Parse string for a floating-point number
///
/// \param[in] str String
/// \param[in] count String code unit count limit
/// \param[out] end On return, count of code units processed
/// \param[in ] locale Stdlib locale used to parse string. Use `NULL` to use locale globally set by `setlocale()`.
///
/// \return Binary floating-point number value
///
inline double strtod(
_In_reads_or_z_opt_(count) const wchar_t* str, _In_ size_t count,
_Out_opt_ size_t* end,
_In_opt_ locale_t locale)
{
std::wstring tmp(str, strnlen(str, count));
wchar_t* _end;
double r;
#if _WIN32
r = _wcstod_l(tmp.c_str(), &_end, locale);
#else
r = wcstod_l(tmp.c_str(), &_end, locale);
#endif
if (end) *end = (size_t)(_end - tmp.c_str());
return r;
}
/// \cond internal
inline int vsnprintf(_Out_z_cap_(capacity) char* str, _In_ size_t capacity, _In_z_ _Printf_format_string_params_(2) const char* format, _In_opt_ locale_t locale, _In_ va_list arg)
{