eudev/strv.c
2010-02-03 13:03:47 +01:00

177 lines
3.5 KiB
C

/*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <assert.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include "util.h"
#include "strv.h"
char *strv_find(char **l, const char *name) {
assert(l);
assert(name);
for (; *l; l++)
if (streq(*l, name))
return *l;
return NULL;
}
void strv_free(char **l) {
char **k;
if (!l)
return;
for (k = l; *k; k++)
free(*k);
free(l);
}
char **strv_copy(char **l) {
char **r, **k;
if (!(r = new(char*, strv_length(l)+1)))
return NULL;
for (k = r; *l; k++, l++)
if (!(*k = strdup(*l)))
goto fail;
*k = NULL;
return r;
fail:
for (k--, l--; k >= r; k--, l--)
free(*k);
return NULL;
}
unsigned strv_length(char **l) {
unsigned n = 0;
if (!l)
return 0;
for (; *l; l++)
n++;
return n;
}
char **strv_new(const char *x, ...) {
const char *s;
char **a;
unsigned n = 0, i = 0;
va_list ap;
if (x) {
n = 1;
va_start(ap, x);
while (va_arg(ap, const char*))
n++;
va_end(ap);
}
if (!(a = new(char*, n+1)))
return NULL;
if (x) {
if (!(a[i] = strdup(x))) {
free(a);
return NULL;
}
i++;
va_start(ap, x);
while ((s = va_arg(ap, const char*))) {
if (!(a[i] = strdup(s)))
goto fail;
i++;
}
va_end(ap);
}
a[i] = NULL;
return a;
fail:
for (; i > 0; i--)
if (a[i-1])
free(a[i-1]);
free(a);
return NULL;
}
char **strv_merge(char **a, char **b) {
char **r, **k;
if (!a)
return strv_copy(b);
if (!b)
return strv_copy(a);
if (!(r = new(char*, strv_length(a)+strv_length(b)+1)))
return NULL;
for (k = r; *a; k++, a++)
if (!(*k = strdup(*a)))
goto fail;
for (; *b; k++, b++)
if (!(*k = strdup(*b)))
goto fail;
*k = NULL;
return r;
fail:
for (k--; k >= r; k--)
free(*k);
return NULL;
}
bool strv_contains(char **l, const char *s) {
char **i;
STRV_FOREACH(i, l)
if (streq(*i, s))
return true;
return false;
}