+abstract_pkg_t **init_providelist(pkg_t *pkg, int *count)
+{
+ abstract_pkg_t *ab_pkg;
+ abstract_pkg_t **provides = pkg_get_ptr(pkg, PKG_PROVIDES);
+
+ if (!provides) {
+ provides = calloc(2, sizeof(abstract_pkg_t *));
+
+ if (!provides) {
+ if (count)
+ *count = 0;
+
+ return NULL;
+ }
+
+ ab_pkg = ensure_abstract_pkg_by_name(pkg->name);
+
+ if (!ab_pkg->pkgs)
+ ab_pkg->pkgs = pkg_vec_alloc();
+
+ abstract_pkg_vec_insert(ab_pkg->provided_by, ab_pkg);
+
+ provides[0] = ab_pkg;
+ provides[1] = NULL;
+
+ if (count)
+ *count = 2;
+
+ pkg_set_ptr(pkg, PKG_PROVIDES, provides);
+ }
+ else if (count) {
+ for (*count = 1; *provides; provides++)
+ (*count)++;
+ }
+
+ return provides;
+}
+
+void parse_providelist(pkg_t *pkg, char *list)
+{
+ int count = 0;
+ char *item, *tok;
+ abstract_pkg_t *ab_pkg, *provided_abpkg, **tmp, **provides;
+
+ provides = init_providelist(pkg, &count);
+ ab_pkg = ensure_abstract_pkg_by_name(pkg->name);
+
+ if (!provides || !ab_pkg)
+ return;
+
+ for (item = strtok_r(list, ", ", &tok); item;
+ count++, item = strtok_r(NULL, ", ", &tok)) {
+ tmp = realloc(provides, sizeof(abstract_pkg_t *) * (count + 1));
+
+ if (!tmp)
+ break;
+
+ provided_abpkg = ensure_abstract_pkg_by_name(item);
+
+ abstract_pkg_vec_insert(provided_abpkg->provided_by, ab_pkg);
+
+ provides = tmp;
+ provides[count - 1] = provided_abpkg;
+ }
+
+ provides[count - 1] = NULL;
+
+ pkg_set_ptr(pkg, PKG_PROVIDES, provides);
+}
+
+void parse_replacelist(pkg_t *pkg, char *list)
+{
+ int count;
+ char *item, *tok;
+ abstract_pkg_t *ab_pkg, *old_abpkg, **tmp, **replaces = NULL;
+
+ ab_pkg = ensure_abstract_pkg_by_name(pkg->name);
+
+ if (!ab_pkg->pkgs)
+ ab_pkg->pkgs = pkg_vec_alloc();
+
+ abstract_pkg_vec_insert(ab_pkg->provided_by, ab_pkg);
+
+ for (count = 1, item = strtok_r(list, ", ", &tok);
+ item;
+ count++, item = strtok_r(NULL, ", ", &tok), count++) {
+ tmp = realloc(replaces, sizeof(abstract_pkg_t *) * (count + 1));
+
+ if (!tmp)
+ break;
+
+ old_abpkg = ensure_abstract_pkg_by_name(item);
+
+ if (!old_abpkg->replaced_by)
+ old_abpkg->replaced_by = abstract_pkg_vec_alloc();
+
+ /* if a package pkg both replaces and conflicts old_abpkg,
+ * then add it to the replaced_by vector so that old_abpkg
+ * will be upgraded to ab_pkg automatically */
+ if (pkg_conflicts_abstract(pkg, old_abpkg))
+ abstract_pkg_vec_insert(old_abpkg->replaced_by, ab_pkg);
+
+ replaces = tmp;
+ replaces[count - 1] = old_abpkg;
+ }
+
+ if (!replaces)
+ return;
+
+ replaces[count - 1] = NULL;
+
+ pkg_set_ptr(pkg, PKG_REPLACES, replaces);
+}
+