94 lines
2.9 KiB
C
94 lines
2.9 KiB
C
/* $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
|
|
|