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-rw-r--r--lib/libalpm/package.c36
1 files changed, 27 insertions, 9 deletions
diff --git a/lib/libalpm/package.c b/lib/libalpm/package.c
index 07b5fa38..685a411f 100644
--- a/lib/libalpm/package.c
+++ b/lib/libalpm/package.c
@@ -566,8 +566,6 @@ alpm_list_t SYMEXPORT *alpm_pkg_compute_requiredby(pmpkg_t *pkg)
return(reqs);
}
-/** @} */
-
/** Compare two version strings and determine which one is 'newer'.
* Returns a value comparable to the way strcmp works. Returns 1
* if a is newer than b, 0 if a and b are the same version, or -1
@@ -577,6 +575,12 @@ alpm_list_t SYMEXPORT *alpm_pkg_compute_requiredby(pmpkg_t *pkg)
* at lib/rpmvercmp.c, and was most recently updated against rpm
* version 4.4.2.3. Small modifications have been made to make it more
* consistent with the libalpm coding style.
+ *
+ * Keep in mind that the pkgrel is only compared if it is available
+ * on both versions handed to this function. For example, comparing
+ * 1.5-1 and 1.5 will yield 0; comparing 1.5-1 and 1.5-2 will yield
+ * -1 as expected. This is mainly for supporting versioned dependencies
+ * that do not include the pkgrel.
*/
int SYMEXPORT alpm_pkg_vercmp(const char *a, const char *b)
{
@@ -688,6 +692,26 @@ int SYMEXPORT alpm_pkg_vercmp(const char *a, const char *b)
one = ptr1;
*ptr2 = oldch2;
two = ptr2;
+
+ /* libalpm added code. check if version strings have hit the pkgrel
+ * portion. depending on which strings have hit, take correct action.
+ * this is all based on the premise that we only have one dash in
+ * the version string, and it separates pkgver from pkgrel. */
+ if(*ptr1 == '-' && *ptr2 == '-') {
+ /* no-op, continue comparing since we are equivalent throughout */
+ } else if(*ptr1 == '-') {
+ /* ptr1 has hit the pkgrel and ptr2 has not.
+ * version 2 is newer iff we are not at the end of ptr2;
+ * if we are at end then one version had pkgrel and one did not */
+ ret = *ptr2 ? -1 : 0;
+ goto cleanup;
+ } else if(*ptr2 == '-') {
+ /* ptr2 has hit the pkgrel and ptr1 has not.
+ * version 1 is newer iff we are not at the end of ptr1;
+ * if we are at end then one version had pkgrel and one did not */
+ ret = *ptr1 ? 1 : 0;
+ goto cleanup;
+ }
}
/* this catches the case where all numeric and alpha segments have */
@@ -698,13 +722,6 @@ int SYMEXPORT alpm_pkg_vercmp(const char *a, const char *b)
goto cleanup;
}
- /* libalpm added code. one version string may have a pkgrel number, the
- * other may not. unless both have them, we ignore it and return 0. */
- if( (*one && *one == '-') || (*two && *two == '-') ) {
- ret = 0;
- goto cleanup;
- }
-
/* whichever version still has characters left over wins */
if (!*one) {
ret = -1;
@@ -718,6 +735,7 @@ cleanup:
return(ret);
}
+/** @} */
pmpkg_t *_alpm_pkg_new(void)
{