sdlVsnprintf function stdinc

int sdlVsnprintf(Pointer<Int8> text, int maxlen, String? fmt)

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.

\param text the buffer to write the string into. Must not be NULL. \param maxlen the maximum bytes to write, including the null-terminator. \param fmt a printf-style format string. Must not be NULL. \param 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.

\threadsafety It is safe to call this function from any thread.

\since This function is available since SDL 3.2.0.

extern SDL_DECLSPEC int SDLCALL SDL_vsnprintf(SDL_OUT_Z_CAP(maxlen) char *text, size_t maxlen, SDL_PRINTF_FORMAT_STRING const char *fmt, va_list ap) SDL_PRINTF_VARARG_FUNCV(3)

Implementation

int sdlVsnprintf(Pointer<Int8> text, int maxlen, String? fmt) {
  final sdlVsnprintfLookupFunction = _libSdl
      .lookupFunction<
        Int32 Function(Pointer<Int8> text, Uint32 maxlen, Pointer<Utf8> fmt),
        int Function(Pointer<Int8> text, int maxlen, Pointer<Utf8> fmt)
      >('SDL_vsnprintf');
  final fmtPointer = fmt != null ? fmt.toNativeUtf8() : nullptr;
  final result = sdlVsnprintfLookupFunction(text, maxlen, fmtPointer);
  calloc.free(fmtPointer);
  return result;
}