diff options
Diffstat (limited to 'versioncmp.c')
| -rw-r--r-- | versioncmp.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/versioncmp.c b/versioncmp.c index 7511e08..80bfd10 100644 --- a/versioncmp.c +++ b/versioncmp.c @@ -1,4 +1,5 @@ #include "cache.h" +#include "string-list.h" /* * versioncmp(): copied from string/strverscmp.c in glibc commit @@ -20,6 +21,48 @@ #define CMP 2 #define LEN 3 +static const struct string_list *prereleases; +static int initialized; + +/* + * 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. + * + * 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. + * + * Return non-zero if *diff contains the return value for versioncmp() + */ +static int swap_prereleases(const void *p1_, + const void *p2_, + int *diff) +{ + const char *p1 = p1_; + const char *p2 = p2_; + int i, i1 = -1, i2 = -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; + } + if (i1 == -1 && i2 == -1) + return 0; + if (i1 >= 0 && i2 >= 0) + *diff = i1 - i2; + else if (i1 >= 0) + *diff = -1; + else /* if (i2 >= 0) */ + *diff = 1; + return 1; +} /* * Compare S1 and S2 as strings holding indices/version numbers, @@ -74,6 +117,13 @@ int versioncmp(const char *s1, const char *s2) state += (c1 == '0') + (isdigit (c1) != 0); } + if (!initialized) { + initialized = 1; + prereleases = git_config_get_value_multi("versionsort.prereleasesuffix"); + } + if (prereleases && swap_prereleases(p1 - 1, p2 - 1, &diff)) + return diff; + state = result_type[state * 3 + (((c2 == '0') + (isdigit (c2) != 0)))]; switch (state) { |