Formatting a string on a variadic parameter function without using GC

[David G. Maziero via Digitalmars-d-learn]

I figured out what I wanted. Thanks for your answer Mike, sorry 
to bother you though.

Here's the result:

void RenderText( FontBMP font, int x, int y, const char* text, 
... )
{
	SDL_Rect rect1, rect2;
	rect2.x = x;
	rect2.y = y;
	rect2.w = font.width;
	rect2.h = font.height;
	rect1.w = font.width;
	rect1.h = font.height;

	char[256] buff;
	va_list	ap;
	va_start( ap, text );
	sprintf( buff.ptr, text, ap );
	va_end( ap );

	for( int r=0; buff[r]!='\0'; ++r )
	{
		char letter = buff[r];
		rect1.x = font.width*(letter%font.horizontal_count);
		rect1.y = font.height*(letter/font.horizontal_count);
		if( letter>=33 ) SDL_RenderCopy( g_renderer, font.texture, 
&rect1, &rect2 );
		rect2.x += font.spacing_x;
		if( letter==10 )
		{
			rect2.x = x;
			rect2.y += font.spacing_y;
		}
	}
}

Since the "string" is built by sprintf, it'll be null-terminated.

Sorry for posting without doing more research. I didn't realise I 
could use va_start/va_end just like in C.