/* $Id: cut.c 639 2005-11-21 04:43:14Z bruce $ */
/* str/cut.c - Cut characters from the left or right of a string.
 * Copyright (C) 2001,2005  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 <string.h>
#include "str.h"

/** Cut \c count bytes from the right (end) of the string */
void str_rcut(str* s, unsigned count)
{
  unsigned newlen;
  newlen = (s->len < count) ? 0 : s->len - count;
  str_truncate(s, newlen);
}

/** Cut \c count bytes from the left (front) of the string */
void str_lcut(str* s, unsigned count)
{
  unsigned newlen;
  newlen = (s->len < count) ? 0 : s->len - count;
  if (count > s->len)
    newlen = 0;
  else {
    newlen = s->len - count;
    memmove(s->s, s->s+count, newlen);
  }
  str_truncate(s, newlen);
}