/* str/catf.c - Append formatted data to a string
 * Copyright (C) 2005  Bruce Guenter <bruce@untroubled.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */
#include "str.h"
#include "fmt.h"

/** Append formatted data using \c fmt_multi from a \c va_list */
int str_catfv(str* s, const char* format, va_list ap)
{
  unsigned length;
  va_list ap2;

  va_copy(ap2, ap);
  length = fmt_multiv(0, format, ap2);
  va_end(ap2);
  if (!str_realloc(s, s->len + length))
    return 0;

  fmt_multiv(s->s + s->len, format, ap);

  s->s[s->len += length] = 0;
  return 1;
}

/** Append formatted data using \c fmt_multi from variable arguments */
int str_catf(str* s, const char* format, ...)
{
  int i;
  va_list ap;
  va_start(ap, format);
  i = str_catfv(s, format, ap);
  va_end(ap);
  return i;
}

#ifdef SELFTEST_MAIN
MAIN
{
  static str s;
  str_copys(&s, "foo");
  debugstrfn(str_catf(&s, "d{bar}x", 10, 20), &s);
}
#endif
#ifdef SELFTEST_EXP
result=1 len=10 size=16 s=foo10bar14
#endif