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authorDavid Oberhollenzer <david.oberhollenzer@tele2.at>2018-05-23 22:26:17 +0200
committerDavid Oberhollenzer <david.oberhollenzer@tele2.at>2018-06-09 15:32:29 +0200
commitbf63f78b6698f33ed3acbd4aed8822a35688c1ba (patch)
tree4e7c79326dd6fd217f135234dbcf3d9bc09ebb82 /lib/src/svc_tsort.c
parent1eb8a4c792166360137cb5c83afa75eace2b4b1d (diff)
Split configuration parser and utility library
Signed-off-by: David Oberhollenzer <david.oberhollenzer@tele2.at>
Diffstat (limited to 'lib/src/svc_tsort.c')
-rw-r--r--lib/src/svc_tsort.c95
1 files changed, 0 insertions, 95 deletions
diff --git a/lib/src/svc_tsort.c b/lib/src/svc_tsort.c
deleted file mode 100644
index 5f83fa0..0000000
--- a/lib/src/svc_tsort.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/* SPDX-License-Identifier: GPL-3.0-or-later */
-/*
- * Copyright (C) 2018 - David Oberhollenzer
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- */
-#include <stdbool.h>
-#include <stddef.h>
-#include <string.h>
-#include <errno.h>
-
-#include "service.h"
-
-static bool has_dependencies(service_t *list, service_t *svc)
-{
- const char *ptr;
- int i;
-
- while (list != NULL) {
- for (ptr = svc->after, i = 0; i < svc->num_after; ++i) {
- if (!strcmp(ptr, list->name))
- return true;
- ptr += strlen(ptr) + 1;
- }
-
- for (ptr = list->before, i = 0; i < list->num_before; ++i) {
- if (!strcmp(ptr, svc->name))
- return true;
- ptr += strlen(ptr) + 1;
- }
-
- list = list->next;
- }
-
- return false;
-}
-
-service_t *svc_tsort(service_t *list)
-{
- service_t *nl = NULL, *end = NULL;
- service_t *svc, *prev;
-
- while (list != NULL) {
- /* remove first service without dependencies */
- prev = NULL;
- svc = list;
-
- while (svc != NULL) {
- if (has_dependencies(list, svc)) {
- prev = svc;
- svc = svc->next;
- } else {
- if (prev != NULL) {
- prev->next = svc->next;
- } else {
- list = svc->next;
- }
- svc->next = NULL;
- break;
- }
- }
-
- /* cycle! */
- if (svc == NULL) {
- if (end == NULL) {
- nl = list;
- } else {
- end->next = list;
- }
- errno = ELOOP;
- break;
- }
-
- /* append to new list */
- if (end == NULL) {
- nl = end = svc;
- } else {
- end->next = svc;
- end = svc;
- }
- }
-
- return nl;
-}