Add strndup fallback function to libalpm util

The same fallback we are currently using in the pacman frontend.

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

1 files changed, 22 insertions, 0 deletions

diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c
index 2eee5e4a..81d950e8 100644
--- a/lib/libalpm/util.c
+++ b/lib/libalpm/util.c
@@ -937,4 +937,26 @@ long _alpm_parsedate(const char *line)
 	return(atol(line));
 }
 
+#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
+
 /* vim: set ts=2 sw=2 noet: */