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

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This commit is contained in:
Lennart Poettering 2010-02-12 02:00:49 +01:00
parent 451a074fd5
commit 82919e3d31
2 changed files with 20 additions and 0 deletions
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16
util.c
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@ -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) {

4
util.h
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@ -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);