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>

5 files changed, 4 insertions, 37 deletions

diff --git a/lib/libalpm/Makefile.am b/lib/libalpm/Makefile.am
index c935e2db..5cf66b91 100644
--- a/lib/libalpm/Makefile.am
+++ b/lib/libalpm/Makefile.am
@@ -53,6 +53,7 @@ libalpm_la_SOURCES = \
 	sync.h sync.c \
 	trans.h trans.c \
 	util.h util.c \
+	util-common.h util-common.c \
 	version.c
 
 if !HAVE_LIBSSL
diff --git a/lib/libalpm/util-common.c b/lib/libalpm/util-common.c
new file mode 120000
index 00000000..cf965176
--- /dev/null
+++ b/lib/libalpm/util-common.c
@@ -0,0 +1 @@
+../../src/common/util-common.c
\ No newline at end of file
diff --git a/lib/libalpm/util-common.h b/lib/libalpm/util-common.h
new file mode 120000
index 00000000..988c2acc
--- /dev/null
+++ b/lib/libalpm/util-common.h
@@ -0,0 +1 @@
+../../src/common/util-common.h
\ No newline at end of file
diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index c33e32a3..f6e66321 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -1256,37 +1256,4 @@ void _alpm_alloc_fail(size_t size)
 	fprintf(stderr, "alloc failure: could not allocate %zd bytes\n", size);
 }
 
-#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: */
diff --git a/lib/libalpm/util.h b/lib/libalpm/util.h
index 734e0e5f..3a6b14af 100644
--- a/lib/libalpm/util.h
+++ b/lib/libalpm/util.h
@@ -28,6 +28,7 @@
 #include "alpm.h"
 #include "package.h" /* alpm_pkg_t */
 #include "handle.h" /* alpm_handle_t */
+#include "util-common.h"
 
 #include <stdio.h>
 #include <string.h>
@@ -142,10 +143,6 @@ int _alpm_fnmatch(const void *pattern, const void *string);
 char *strsep(char **, const char *);
 #endif
 
-#ifndef HAVE_STRNDUP
-char *strndup(const char *s, size_t n);
-#endif
-
 /* check exported library symbols with: nm -C -D <lib> */
 #define SYMEXPORT __attribute__((visibility("default")))
 #define SYMHIDDEN __attribute__((visibility("internal")))