src/util: provide strndup definitions where needed

Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/src/util/pacsort.c b/src/util/pacsort.c
index 2b12f097..0eedf59d 100644
--- a/src/util/pacsort.c
+++ b/src/util/pacsort.c
@@ -48,6 +48,28 @@ static struct options_t {
 	char delim;
 } opts;
 
+#ifndef HAVE_STRNDUP
+/* A quick and dirty implementation derived from glibc */
+static size_t strnlen(const char *s, size_t max)
+{
+    register const char *p;
+    for(p = s; *p && max--; ++p);
+    return (p - s);
+}
+
+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
+
 static struct buffer_t *buffer_new(size_t initial_size)
 {
 	struct buffer_t *buf;