Function SDL_vasprintf 

pub unsafe extern "C" fn SDL_vasprintf(
    strp: *mut *mut c_char,
    fmt: *const c_char,
    ap: VaList,
) -> c_int

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

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

Parameters

• strp: on output, is set to the new string. Must not be NULL.
• 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 in the newly-allocated string, 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.