/* $NetBSD: stresep.c,v 1.4 2017/08/23 10:27:41 christos Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. 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 University 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 REGENTS 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 REGENTS 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.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/cdefs.h>
#include <assert.h>
#include <string.h>
#if !defined(HAVE_STRESEP)
char * stresep(char **stringp, const char *delim, int esc);
/*
* Get next token from string *stringp, where tokens are possibly-empty
* strings separated by characters from delim. If esc is not NUL, then
* the characters followed by esc are ignored and are not taken into account
* when splitting the string.
*
* Writes NULs into the string at *stringp to end tokens.
* delim need not remain constant from call to call.
* On return, *stringp points past the last NUL written (if there might
* be further tokens), or is NULL (if there are definitely no more tokens).
*
* If *stringp is NULL, stresep returns NULL.
*/
char *
stresep(char **stringp, const char *delim, int esc)
{
char *s;
const char *spanp;
int c, sc;
size_t l;
char *tok;
if (stringp == NULL || delim == NULL)
return NULL;
if ((s = *stringp) == NULL)
return NULL;
l = strlen(s) + 1;
for (tok = s;;) {
c = *s++;
l--;
while (esc != '\0' && c == esc) {
memmove(s - 1, s, l);
c = *s++;
l--;
}
spanp = delim;
do {
if ((sc = *spanp++) == c) {
if (c == '\0')
s = NULL;
else
s[-1] = '\0';
*stringp = s;
return tok;
}
} while (sc != '\0');
}
}
#endif
