along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <assert.h>
#include <stdlib.h>
-#include <unistd.h>
#include "util.h"
#include "macro.h"
-#include "def.h"
#include "bus-label.h"
return r;
}
-char *bus_label_unescape(const char *f) {
+char *bus_label_unescape_n(const char *f, size_t l) {
char *r, *t;
+ size_t i;
assert_return(f, NULL);
/* Special case for the empty string */
- if (streq(f, "_"))
+ if (l == 1 && *f == '_')
return strdup("");
- r = new(char, strlen(f) + 1);
+ r = new(char, l + 1);
if (!r)
return NULL;
- for (t = r; *f; f++) {
-
- if (*f == '_') {
+ for (i = 0, t = r; i < l; ++i) {
+ if (f[i] == '_') {
int a, b;
- if ((a = unhexchar(f[1])) < 0 ||
- (b = unhexchar(f[2])) < 0) {
+ if (l - i < 3 ||
+ (a = unhexchar(f[i + 1])) < 0 ||
+ (b = unhexchar(f[i + 2])) < 0) {
/* Invalid escape code, let's take it literal then */
*(t++) = '_';
} else {
*(t++) = (char) ((a << 4) | b);
- f += 2;
+ i += 2;
}
} else
- *(t++) = *f;
+ *(t++) = f[i];
}
*t = 0;