/*
 * vstring.c - Variable-length strings
 *
 * Copyright 2012 by Werner Almesberger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */


#include <stdlib.h>
#include <string.h>

#include "vstring.h"


void append_n(char **res, int *res_len, const char *s, int len)
{
	if (!len)
		return;
	if (!*res)
		*res_len = 0;
	*res = realloc(*res, *res_len+len+1);
	if (!*res)
		abort();
	memcpy(*res+*res_len, s, len);
	*res_len += len;
	(*res)[*res_len] = 0;
}


void append(char **res, int *res_len, const char *s)
{
	append_n(res, res_len, s, strlen(s));
}