Function SDL_vsnprintf 

pub unsafe extern "C" fn SDL_vsnprintf(
    text: *mut c_char,
    maxlen: usize,
    fmt: *const c_char,
    ap: *mut __va_list_tag,
) -> c_int

This works exactly like vsnprintf() but doesn’t require access to a C runtime.

Functions identically to SDL_snprintf(), except it takes a va_list instead of using ... variable arguments.

Parameter: text the buffer to write the string into. Must not be NULL. Parameter: maxlen the maximum bytes to write, including the null-terminator. Parameter: fmt a printf-style format string. Must not be NULL. Parameter: ap a va_list values to be used with the format string. 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.

Available Since: This function is available since SDL 3.2.0.