Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_vsnprintf - This works exactly like vsnprintf() but doesn't require access to a C runtime.
HEADER FILE
Defined in SDL3/SDL_stdinc.h
SYNOPSIS
#include "SDL3/SDL.h" int SDL_vsnprintf(char *text, size_t maxlen, const char *fmt, va_list ap);
DESCRIPTION
Functions identically to SDL_snprintf (), except it takes a va_list instead of using ... variable arguments.
FUNCTION PARAMETERS
text the buffer to write the string into. Must not be NULL. maxlen the maximum bytes to write, including the null-terminator. fmt a printf-style format string. Must not be NULL. ap a va_list values to be used with the format string.
RETURN VALUE
Returns the number of bytes that should be written, not counting the null-terminator char, or a negative value on error.
THREAD SAFETY
It is safe to call this function from any thread.
AVAILABILITY
This function is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.8 SDL_vsnprintf(3)