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stb_sprintf: add attribute format to variadic functions 

This allows for compiler verification of the format string
just like printf.
This commit is contained in:
Michael Aganier 2021-06-14 14:38:26 -04:00 committed by Fabian Giesen
parent 05e1efab3d
commit 40d7e47896
1 changed files with 13 additions and 2 deletions
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15
stb_sprintf.h
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@ -7,6 +7,7 @@
//
// Contributors:
// Fabian "ryg" Giesen (reformatting)
// github:aganm (attribute format)
//
// Contributors (bugfixes):
// github:d26435
@ -176,6 +177,16 @@ PERFORMANCE vs MSVC 2008 32-/64-bit (GCC is even slower than MSVC):
#endif
#endif
#if defined(__has_attribute)
#if __has_attribute(format)
#define STBSP__ATTRIBUTE_FORMAT(fmt,va) __attribute__((format(printf,fmt,va)))
#endif
#endif
#ifndef STBSP__ATTRIBUTE_FORMAT
#define STBSP__ATTRIBUTE_FORMAT(fmt,va)
#endif
#include <stdarg.h> // for va_list()
#include <stddef.h> // size_t, ptrdiff_t
@ -190,8 +201,8 @@ typedef char *STBSP_SPRINTFCB(const char *buf, void *user, int len);
STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(vsprintf)(char *buf, char const *fmt, va_list va);
STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(vsnprintf)(char *buf, int count, char const *fmt, va_list va);
STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(sprintf)(char *buf, char const *fmt, ...);
STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(snprintf)(char *buf, int count, char const *fmt, ...);
STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(sprintf)(char *buf, char const *fmt, ...) STBSP__ATTRIBUTE_FORMAT(2,3);
STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(snprintf)(char *buf, int count, char const *fmt, ...) STBSP__ATTRIBUTE_FORMAT(3,4);
STBSP__PUBLICDEF int STB_SPRINTF_DECORATE(vsprintfcb)(STBSP_SPRINTFCB *callback, void *user, char *buf, char const *fmt, va_list va);
STBSP__PUBLICDEF void STB_SPRINTF_DECORATE(set_separators)(char comma, char period);