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[UCRT] Add workaround for va_arg warning about type promotion

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Timo Kreuzer 2024-10-14 00:03:54 +03:00
parent faedd8ff75
commit a21a206c89
1 changed files with 17 additions and 0 deletions
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17
sdk/lib/ucrt/inc/corecrt_internal_stdio_output.h
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@ -30,16 +30,33 @@ namespace __crt_stdio_output {
// reads the next argument of type T from the varargs list and updates the // reads the next argument of type T from the varargs list and updates the
// va_list, just like va_arg does. The 'peek' function returns the next argument // va_list, just like va_arg does. The 'peek' function returns the next argument
// of type T, but does not modify the va_list. // of type T, but does not modify the va_list.
#if defined(__GNUC__) || defined(__clang__)
template<typename T> struct _va_arg_promoted_tye { using type = T; };
template<> struct _va_arg_promoted_tye<signed char> { using type = int; };
template<> struct _va_arg_promoted_tye<unsigned char> { using type = int; };
template<> struct _va_arg_promoted_tye<wchar_t> { using type = int; };
template<> struct _va_arg_promoted_tye<short int> { using type = int; };
template<> struct _va_arg_promoted_tye<short unsigned int> { using type = int; };
#endif
template <typename T> template <typename T>
T read_va_arg(va_list& arglist) throw() T read_va_arg(va_list& arglist) throw()
{ {
#if defined(__GNUC__) || defined(__clang__)
return (T)(va_arg(arglist, typename _va_arg_promoted_tye<T>::type));
#else
return va_arg(arglist, T); return va_arg(arglist, T);
#endif
} }
template <typename T> template <typename T>
T peek_va_arg(va_list arglist) throw() T peek_va_arg(va_list arglist) throw()
{ {
#if defined(__GNUC__) || defined(__clang__)
return (T)(va_arg(arglist, typename _va_arg_promoted_tye<T>::type));
#else
return va_arg(arglist, T); return va_arg(arglist, T);
#endif
} }