deps.c: split _alpm_depcmp into _alpm_depcmp_provides

This allows to reuse the provision checker for a simple list of
provisions without a package.

Signed-off-by: Florian Pritz <bluewind@xinu.at>

2 files changed, 15 insertions, 7 deletions

diff --git a/lib/libalpm/deps.c b/lib/libalpm/deps.c
index c5acfc95..7daa28d3 100644
--- a/lib/libalpm/deps.c
+++ b/lib/libalpm/deps.c
@@ -416,17 +416,18 @@ int _alpm_depcmp_literal(alpm_pkg_t *pkg, alpm_depend_t *dep)
 	return dep_vercmp(pkg->version, dep->mod, dep->version);
 }
 
-int _alpm_depcmp(alpm_pkg_t *pkg, alpm_depend_t *dep)
+/**
+ * @param dep dependency to check agains the provision list
+ * @param provisions provision list
+ * @return 1 if provider is found, 0 otherwise
+ */
+int _alpm_depcmp_provides(alpm_depend_t *dep, alpm_list_t *provisions)
 {
+	int satisfy = 0;
 	alpm_list_t *i;
-	int satisfy = _alpm_depcmp_literal(pkg, dep);
-
-	if(satisfy) {
-		return satisfy;
-	}
 
 	/* check provisions, name and version if available */
-	for(i = alpm_pkg_get_provides(pkg); i && !satisfy; i = i->next) {
+	for(i = provisions; i && !satisfy; i = i->next) {
 		alpm_depend_t *provision = i->data;
 
 		if(dep->mod == ALPM_DEP_MOD_ANY) {
@@ -444,6 +445,12 @@ int _alpm_depcmp(alpm_pkg_t *pkg, alpm_depend_t *dep)
 	return satisfy;
 }
 
+int _alpm_depcmp(alpm_pkg_t *pkg, alpm_depend_t *dep)
+{
+	return _alpm_depcmp_literal(pkg, dep)
+		|| _alpm_depcmp_provides(dep, alpm_pkg_get_provides(pkg));
+}
+
 alpm_depend_t *_alpm_splitdep(const char *depstring)
 {
 	alpm_depend_t *depend;
diff --git a/lib/libalpm/deps.h b/lib/libalpm/deps.h
index e36bbb38..f4eadba1 100644
--- a/lib/libalpm/deps.h
+++ b/lib/libalpm/deps.h
@@ -37,6 +37,7 @@ int _alpm_resolvedeps(alpm_handle_t *handle, alpm_list_t *localpkgs, alpm_pkg_t
 		alpm_list_t **data);
 alpm_depend_t *_alpm_splitdep(const char *depstring);
 int _alpm_depcmp_literal(alpm_pkg_t *pkg, alpm_depend_t *dep);
+int _alpm_depcmp_provides(alpm_depend_t *dep, alpm_list_t *provisions);
 int _alpm_depcmp(alpm_pkg_t *pkg, alpm_depend_t *dep);
 
 #endif /* _ALPM_DEPS_H */