module builtin

// print_backtrace shows a backtrace of the current call stack on stdout.
pub fn print_backtrace() {
	// At the time of backtrace_symbols_fd call, the C stack would look something like this:
	// * print_backtrace_skipping_top_frames
	// * print_backtrace itself
	// * the rest of the backtrace frames
	// => top 2 frames should be skipped, since they will not be informative to the developer
	$if !no_backtrace ? {
		$if freestanding {
			println(bare_backtrace())
		} $else $if native {
			// TODO: native backtrace solution
		} $else $if tinyc {
			C.tcc_backtrace(c'Backtrace')
		} $else $if use_libbacktrace ? {
			// NOTE: TCC doesn't have the unwind library
			print_libbacktrace(1)
		} $else {
			print_backtrace_skipping_top_frames(2)
		}
	}
}

fn eprint_space_padding(output string, max_len int) {
	padding_len := max_len - output.len
	if padding_len > 0 {
		for _ in 0 .. padding_len {
			eprint(' ')
		}
	}
}