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authorAllan McRae <allan@archlinux.org>2013-01-03 20:49:33 +1000
committerAllan McRae <allan@archlinux.org>2013-01-04 21:49:37 +1000
commit27d9c25ee2fd6a03fb1ec1afdfbe105048875bae (patch)
treec5f6739e5f72a153fb358b2702965c39352ef630 /src/common/util-common.c
parent965e1de2174148a7a6c0860a7514d9bb1969bf03 (diff)
Split common utility functions for libalpm and pacman
There is duplicated code in the util.c files in the libalpm and pacman source code. Split this into a separate file so that it can be shared via a symlink. This prevents code divergence between the two code bases. Also, move mbasename and mdirname from pacman/util.c into util-common.c in preparation for the following patch that uses them to add an extension to pacsave files. Signed-off-by: Allan McRae <allan@archlinux.org>
Diffstat (limited to 'src/common/util-common.c')
-rw-r--r--src/common/util-common.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/src/common/util-common.c b/src/common/util-common.c
new file mode 100644
index 00000000..e2b5939c
--- /dev/null
+++ b/src/common/util-common.c
@@ -0,0 +1,109 @@
+/*
+ * util-common.c
+ *
+ * Copyright (c) 2006-2012 Pacman Development Team <pacman-dev@archlinux.org>
+ *
+ * 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 2 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "util-common.h"
+
+
+/** Parse the basename of a program from a path.
+* @param path path to parse basename from
+*
+* @return everything following the final '/'
+*/
+const char *mbasename(const char *path)
+{
+ const char *last = strrchr(path, '/');
+ if(last) {
+ return last + 1;
+ }
+ return path;
+}
+
+/** Parse the dirname of a program from a path.
+* The path returned should be freed.
+* @param path path to parse dirname from
+*
+* @return everything preceding the final '/'
+*/
+char *mdirname(const char *path)
+{
+ char *ret, *last;
+
+ /* null or empty path */
+ if(path == NULL || path == '\0') {
+ return strdup(".");
+ }
+
+ if((ret = strdup(path)) == NULL) {
+ return NULL;
+ }
+
+ last = strrchr(ret, '/');
+
+ if(last != NULL) {
+ /* we found a '/', so terminate our string */
+ if(last == ret) {
+ /* return "/" for root */
+ last++;
+ }
+ *last = '\0';
+ return ret;
+ }
+
+ /* no slash found */
+ free(ret);
+ return strdup(".");
+}
+
+#ifndef HAVE_STRNDUP
+/* A quick and dirty implementation derived from glibc */
+/** Determines the length of a fixed-size string.
+ * @param s string to be measured
+ * @param max maximum number of characters to search for the string end
+ * @return length of s or max, whichever is smaller
+ */
+static size_t strnlen(const char *s, size_t max)
+{
+ register const char *p;
+ for(p = s; *p && max--; ++p);
+ return (p - s);
+}
+
+/** Copies a string.
+ * Returned string needs to be freed
+ * @param s string to be copied
+ * @param n maximum number of characters to copy
+ * @return pointer to the new string on success, NULL on error
+ */
+char *strndup(const char *s, size_t n)
+{
+ size_t len = strnlen(s, n);
+ char *new = (char *) malloc(len + 1);
+
+ if(new == NULL)
+ return NULL;
+
+ new[len] = '\0';
+ return (char *)memcpy(new, s, len);
+}
+#endif
+
+/* vim: set ts=2 sw=2 noet: */