util: add api for iterating through components of a path string

[elogind.git] / util.c

diff --git a/util.c b/util.c
index b54c24a3dcd9efaecbe70ddb39efe8129b3eabd7..c5c8bd4edda6d68f1ef88607b9d09c559e42840a 100644 (file)
--- a/util.c
+++ b/util.c
@@ -1,5 +1,24 @@
 /*-*- 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 <string.h>
 #include <unistd.h>
@@ -17,10 +36,10 @@
 #include "ioprio.h"
 #include "missing.h"
 
-usec_t now(clockid_t clock) {
+usec_t now(clockid_t clock_id) {
         struct timespec ts;
 
-        assert_se(clock_gettime(clock, &ts) == 0);
+        assert_se(clock_gettime(clock_id, &ts) == 0);
 
         return timespec_load(&ts);
 }
@@ -265,6 +284,22 @@ char *split_spaces(const char *c, size_t *l, char **state) {
         return (char*) current;
 }
 
+/* Split a path into filenames. */
+char *split_slash(const char *c, size_t *l, char **state) {
+        char *current;
+
+        current = *state ? *state : (char*) c;
+
+        if (!*current || *c == 0)
+                return NULL;
+
+        current += strspn(current, "/");
+        *l = strcspn(current, "/");
+        *state = current+*l;
+
+        return (char*) current;
+}
+
 /* Split a string into words, but consider strings enclosed in '' and
  * "" as words even if they include spaces. */
 char *split_quoted(const char *c, size_t *l, char **state) {
@@ -805,11 +840,11 @@ char *xescape(const char *s, const char *bad) {
 }
 
 char *bus_path_escape(const char *s) {
-        assert(s);
-
         char *r, *t;
         const char *f;
 
+        assert(s);
+
         /* Escapes all chars that D-Bus' object path cannot deal
          * with. Can be reverse with bus_path_unescape() */
 
@@ -834,11 +869,11 @@ char *bus_path_escape(const char *s) {
 }
 
 char *bus_path_unescape(const char *s) {
-        assert(s);
-
         char *r, *t;
         const char *f;
 
+        assert(s);
+
         if (!(r = new(char, strlen(s)+1)))
                 return NULL;