/**

 * `asprintf.c' - asprintf

 *

 * copyright (c) 2014 joseph werle <joseph.werle@gmail.com>

 */

#ifndef HAVE_ASPRINTF

#include <stdlib.h>

#include <stdio.h>

#include <stdarg.h>

#include "asprintf.h"

int

asprintf (char **str, const char *fmt, ...) {

  int size = 0;

  va_list args;

  // init variadic argumens

  va_start(args, fmt);

  // format and get size

  size = vasprintf(str, fmt, args);

  // toss args

  va_end(args);

  return size;

}

int

vasprintf (char **str, const char *fmt, va_list args) {

  int size = 0;

  va_list tmpa;

  // copy

  va_copy(tmpa, args);

  // apply variadic arguments to

  // sprintf with format to get size

  size = vsnprintf(NULL, size, fmt, tmpa);

  // toss args

  va_end(tmpa);

  // return -1 to be compliant if

  // size is less than 0

  if (size < 0) { return -1; }

  // alloc with size plus 1 for `\0'

  *str = (char *) malloc(size + 1);

  // return -1 to be compliant

  // if pointer is `NULL'

  if (NULL == *str) { return -1; }

  // format string with original

  // variadic arguments and set new size

  size = vsprintf(*str, fmt, args);

  return size;

}

#endif