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

2 files changed, 20 insertions, 0 deletions

diff --git a/util.c b/util.c
index bf74695854..c5c8bd4edd 100644
--- a/util.c
+++ b/util.c
@@ -284,6 +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) {
diff --git a/util.h b/util.h
index 8c9dea801e..f5cb165559 100644
--- a/util.h
+++ b/util.h
@@ -97,6 +97,7 @@ int safe_atolli(const char *s, long long int *ret_i);
 
 char *split_spaces(const char *c, size_t *l, char **state);
 char *split_quoted(const char *c, size_t *l, char **state);
+char *split_slash(const char *c, size_t *l, char **state);
 
 #define FOREACH_WORD(word, length, s, state)                            \
         for ((state) = NULL, (word) = split_spaces((s), &(l), &(state)); (word); (word) = split_spaces((s), &(l), &(state)))
@@ -104,6 +105,9 @@ char *split_quoted(const char *c, size_t *l, char **state);
 #define FOREACH_WORD_QUOTED(word, length, s, state)                     \
         for ((state) = NULL, (word) = split_quoted((s), &(l), &(state)); (word); (word) = split_quoted((s), &(l), &(state)))
 
+#define FOREACH_WORD_SLASH(word, length, s, state)                      \
+        for ((state) = NULL, (word) = split_slash((s), &(l), &(state)); (word); (word) = split_slash((s), &(l), &(state)))
+
 pid_t get_parent_of_pid(pid_t pid, pid_t *ppid);
 
 int write_one_line_file(const char *fn, const char *line);