Add sudo_strsplit(), similar to strtok_r() but non-destructive and
operates on non-C strings (requires a length parameter).
This commit is contained in:
80
lib/util/strsplit.c
Normal file
80
lib/util/strsplit.c
Normal file
@@ -0,0 +1,80 @@
|
||||
/*
|
||||
* Copyright (c) 2015 Todd C. Miller <Todd.Miller@courtesan.com>
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
#include <config.h>
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
#include <stdio.h>
|
||||
#ifdef STDC_HEADERS
|
||||
# include <stdlib.h>
|
||||
# include <stddef.h>
|
||||
#else
|
||||
# ifdef HAVE_STDLIB_H
|
||||
# include <stdlib.h>
|
||||
# endif
|
||||
#endif /* STDC_HEADERS */
|
||||
#include <errno.h>
|
||||
#include <grp.h>
|
||||
|
||||
#include "sudo_compat.h"
|
||||
#include "sudo_debug.h"
|
||||
#include "sudo_util.h"
|
||||
|
||||
/*
|
||||
* Like strtok_r but non-destructive and works w/o a NUL terminator.
|
||||
* TODO: Optimize by storing current char in a variable ch
|
||||
*/
|
||||
const char *
|
||||
sudo_strsplit_v1(const char *str, const char *endstr, const char *sep, const char **last)
|
||||
{
|
||||
const char *cp, *s;
|
||||
debug_decl(sudo_strsplit, SUDO_DEBUG_UTIL)
|
||||
|
||||
/* If no str specified, use last ptr (if any). */
|
||||
if (str == NULL)
|
||||
str = *last;
|
||||
|
||||
/* Skip leading separator characters. */
|
||||
while (str < endstr) {
|
||||
for (s = sep; *s != '\0'; s++) {
|
||||
if (*str == *s) {
|
||||
str++;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (*s == '\0')
|
||||
break;
|
||||
}
|
||||
|
||||
/* Empty string? */
|
||||
if (str >= endstr) {
|
||||
*last = endstr;
|
||||
debug_return_ptr(NULL);
|
||||
}
|
||||
|
||||
/* Scan str until we hit a char from sep. */
|
||||
for (cp = str; cp < endstr; cp++) {
|
||||
for (s = sep; *s != '\0'; s++) {
|
||||
if (*cp == *s)
|
||||
break;
|
||||
}
|
||||
if (*s != '\0')
|
||||
break;
|
||||
}
|
||||
*last = cp;
|
||||
debug_return_const_ptr(str);
|
||||
}
|
Reference in New Issue
Block a user