xref: /netbsd-src/crypto/external/bsd/heimdal/dist/lib/roken/strsep_copy.c (revision d3273b5b76f5afaafe308cead5511dbb8df8c5e9)

/*	$NetBSD: strsep_copy.c,v 1.2 2017/01/28 21:31:50 christos Exp $	*/

/*
 * Copyright (c) 2000, 2002 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <config.h>

#include <string.h>

#include <krb5/roken.h>

#ifndef HAVE_STRSEP_COPY

/* strsep, but with const stringp, so return string in buf */

ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
strsep_copy(const char **stringp, const char *delim, char *buf, size_t len)
{
    const char *save = *stringp;
    size_t l;
    if(save == NULL)
	return -1;
    *stringp = *stringp + strcspn(*stringp, delim);
    l = min(len, (size_t)(*stringp - save));
    if(len > 0) {
	memcpy(buf, save, l);
	buf[l] = '\0';
    }

    l = *stringp - save;
    if(**stringp == '\0')
	*stringp = NULL;
    else
	(*stringp)++;
    return l;
}

#endif