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/*
* librc-strlist.h
* String list functions to make using queue(3) a little easier.
*/
/*
* Copyright (c) 2007-2015 The OpenRC Authors.
* See the Authors file at the top-level directory of this distribution and
* https://github.com/OpenRC/openrc/blob/HEAD/AUTHORS
*
* This file is part of OpenRC. It is subject to the license terms in
* the LICENSE file found in the top-level directory of this
* distribution and at https://github.com/OpenRC/openrc/blob/HEAD/LICENSE
* This file may not be copied, modified, propagated, or distributed
* except according to the terms contained in the LICENSE file.
*/
#include <errno.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include "queue.h"
#include "librc.h"
#include "helpers.h"
RC_STRINGLIST *
rc_stringlist_new(void)
{
RC_STRINGLIST *l = xmalloc(sizeof(*l));
TAILQ_INIT(l);
return l;
}
RC_STRING *
rc_stringlist_add(RC_STRINGLIST *list, const char *value)
{
RC_STRING *s = xmalloc(sizeof(*s));
s->value = xstrdup(value);
TAILQ_INSERT_TAIL(list, s, entries);
return s;
}
RC_STRING *
rc_stringlist_addu(RC_STRINGLIST *list, const char *value)
{
RC_STRING *s;
TAILQ_FOREACH(s, list, entries)
if (strcmp(s->value, value) == 0) {
errno = EEXIST;
return NULL;
}
return rc_stringlist_add(list, value);
}
bool
rc_stringlist_delete(RC_STRINGLIST *list, const char *value)
{
RC_STRING *s;
TAILQ_FOREACH(s, list, entries)
if (strcmp(s->value, value) == 0) {
TAILQ_REMOVE(list, s, entries);
free(s->value);
free(s);
return true;
}
errno = EEXIST;
return false;
}
RC_STRING *
rc_stringlist_find(RC_STRINGLIST *list, const char *value)
{
RC_STRING *s;
if (list) {
TAILQ_FOREACH(s, list, entries)
if (strcmp(s->value, value) == 0)
return s;
}
return NULL;
}
RC_STRINGLIST *
rc_stringlist_split(const char *value, const char *sep)
{
RC_STRINGLIST *list = rc_stringlist_new();
char *d = xstrdup(value);
char *p = d, *token;
while ((token = strsep(&p, sep)))
rc_stringlist_add(list, token);
free(d);
return list;
}
void
rc_stringlist_sort(RC_STRINGLIST **list)
{
RC_STRINGLIST *l = *list;
RC_STRINGLIST *new = rc_stringlist_new();
RC_STRING *s;
RC_STRING *sn;
RC_STRING *n;
RC_STRING *last;
TAILQ_FOREACH_SAFE(s, l, entries, sn) {
TAILQ_REMOVE(l, s, entries);
last = NULL;
TAILQ_FOREACH(n, new, entries) {
if (strcmp(s->value, n->value) < 0)
break;
last = n;
}
if (last)
TAILQ_INSERT_AFTER(new, last, s, entries);
else
TAILQ_INSERT_HEAD(new, s, entries);
}
/* Now we've sorted the list, copy across the new head */
free(l);
*list = new;
}
void
rc_stringlist_free(RC_STRINGLIST *list)
{
RC_STRING *s1;
RC_STRING *s2;
if (!list)
return;
s1 = TAILQ_FIRST(list);
while (s1) {
s2 = TAILQ_NEXT(s1, entries);
free(s1->value);
free(s1);
s1 = s2;
}
free(list);
}
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