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-rw-r--r--versioncmp.c99
1 files changed, 74 insertions, 25 deletions
diff --git a/versioncmp.c b/versioncmp.c
index 80bfd109fa..9f81dc1062 100644
--- a/versioncmp.c
+++ b/versioncmp.c
@@ -24,42 +24,83 @@
static const struct string_list *prereleases;
static int initialized;
+struct suffix_match {
+ int conf_pos;
+ int start;
+ int len;
+};
+
+static void find_better_matching_suffix(const char *tagname, const char *suffix,
+ int suffix_len, int start, int conf_pos,
+ struct suffix_match *match)
+{
+ /*
+ * A better match either starts earlier or starts at the same offset
+ * but is longer.
+ */
+ int end = match->len < suffix_len ? match->start : match->start-1;
+ int i;
+ for (i = start; i <= end; i++)
+ if (starts_with(tagname + i, suffix)) {
+ match->conf_pos = conf_pos;
+ match->start = i;
+ match->len = suffix_len;
+ break;
+ }
+}
+
/*
- * p1 and p2 point to the first different character in two strings. If
- * either p1 or p2 starts with a prerelease suffix, it will be forced
- * to be on top.
- *
- * If both p1 and p2 start with (different) suffix, the order is
- * determined by config file.
+ * off is the offset of the first different character in the two strings
+ * s1 and s2. If either s1 or s2 contains a prerelease suffix containing
+ * that offset or a suffix ends right before that offset, then that
+ * string will be forced to be on top.
*
- * Note that we don't have to deal with the situation when both p1 and
- * p2 start with the same suffix because the common part is already
- * consumed by the caller.
+ * If both s1 and s2 contain a (different) suffix around that position,
+ * their order is determined by the order of those two suffixes in the
+ * configuration.
+ * If any of the strings contains more than one different suffixes around
+ * that position, then that string is sorted according to the contained
+ * suffix which starts at the earliest offset in that string.
+ * If more than one different contained suffixes start at that earliest
+ * offset, then that string is sorted according to the longest of those
+ * suffixes.
*
* Return non-zero if *diff contains the return value for versioncmp()
*/
-static int swap_prereleases(const void *p1_,
- const void *p2_,
+static int swap_prereleases(const char *s1,
+ const char *s2,
+ int off,
int *diff)
{
- const char *p1 = p1_;
- const char *p2 = p2_;
- int i, i1 = -1, i2 = -1;
+ int i;
+ struct suffix_match match1 = { -1, off, -1 };
+ struct suffix_match match2 = { -1, off, -1 };
for (i = 0; i < prereleases->nr; i++) {
const char *suffix = prereleases->items[i].string;
- if (i1 == -1 && starts_with(p1, suffix))
- i1 = i;
- if (i2 == -1 && starts_with(p2, suffix))
- i2 = i;
+ int start, suffix_len = strlen(suffix);
+ if (suffix_len < off)
+ start = off - suffix_len;
+ else
+ start = 0;
+ find_better_matching_suffix(s1, suffix, suffix_len, start,
+ i, &match1);
+ find_better_matching_suffix(s2, suffix, suffix_len, start,
+ i, &match2);
}
- if (i1 == -1 && i2 == -1)
+ if (match1.conf_pos == -1 && match2.conf_pos == -1)
return 0;
- if (i1 >= 0 && i2 >= 0)
- *diff = i1 - i2;
- else if (i1 >= 0)
+ if (match1.conf_pos == match2.conf_pos)
+ /* Found the same suffix in both, e.g. "-rc" in "v1.0-rcX"
+ * and "v1.0-rcY": the caller should decide based on "X"
+ * and "Y". */
+ return 0;
+
+ if (match1.conf_pos >= 0 && match2.conf_pos >= 0)
+ *diff = match1.conf_pos - match2.conf_pos;
+ else if (match1.conf_pos >= 0)
*diff = -1;
- else /* if (i2 >= 0) */
+ else /* if (match2.conf_pos >= 0) */
*diff = 1;
return 1;
}
@@ -118,10 +159,18 @@ int versioncmp(const char *s1, const char *s2)
}
if (!initialized) {
+ const struct string_list *deprecated_prereleases;
initialized = 1;
- prereleases = git_config_get_value_multi("versionsort.prereleasesuffix");
+ prereleases = git_config_get_value_multi("versionsort.suffix");
+ deprecated_prereleases = git_config_get_value_multi("versionsort.prereleasesuffix");
+ if (prereleases) {
+ if (deprecated_prereleases)
+ warning("ignoring versionsort.prereleasesuffix because versionsort.suffix is set");
+ } else
+ prereleases = deprecated_prereleases;
}
- if (prereleases && swap_prereleases(p1 - 1, p2 - 1, &diff))
+ if (prereleases && swap_prereleases(s1, s2, (const char *) p1 - s1 - 1,
+ &diff))
return diff;
state = result_type[state * 3 + (((c2 == '0') + (isdigit (c2) != 0)))];