summaryrefslogtreecommitdiff
path: root/config.c
diff options
context:
space:
mode:
authorJeff King <peff@peff.net>2013-01-23 01:23:05 -0500
committerJunio C Hamano <gitster@pobox.com>2013-01-23 08:41:49 -0800
commit1b86bbb0ade4641c2da0dc74ebca1c09ec772bb4 (patch)
tree349d2c169d9c9f84d855ea5d929407d0722ddaeb /config.c
parent94702dd1ac27618b60198f7c8bceafaaaf7743e2 (diff)
downloadgit-1b86bbb0ade4641c2da0dc74ebca1c09ec772bb4.tar.gz
config: add helper function for parsing key names
The config callback functions get keys of the general form: section.subsection.key (where the subsection may be contain arbitrary data, or may be missing). For matching keys without subsections, it is simple enough to call "strcmp". Matching keys with subsections is a little more complicated, and each callback does it in an ad-hoc way, usually involving error-prone pointer arithmetic. Let's provide a helper that keeps the pointer arithmetic all in one place. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'config.c')
-rw-r--r--config.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/config.c b/config.c
index 7b444b68ab..11bd4d8058 100644
--- a/config.c
+++ b/config.c
@@ -1667,3 +1667,36 @@ int config_error_nonbool(const char *var)
{
return error("Missing value for '%s'", var);
}
+
+int parse_config_key(const char *var,
+ const char *section,
+ const char **subsection, int *subsection_len,
+ const char **key)
+{
+ int section_len = strlen(section);
+ const char *dot;
+
+ /* Does it start with "section." ? */
+ if (prefixcmp(var, section) || var[section_len] != '.')
+ return -1;
+
+ /*
+ * Find the key; we don't know yet if we have a subsection, but we must
+ * parse backwards from the end, since the subsection may have dots in
+ * it, too.
+ */
+ dot = strrchr(var, '.');
+ *key = dot + 1;
+
+ /* Did we have a subsection at all? */
+ if (dot == var + section_len) {
+ *subsection = NULL;
+ *subsection_len = 0;
+ }
+ else {
+ *subsection = var + section_len + 1;
+ *subsection_len = dot - *subsection;
+ }
+
+ return 0;
+}