1 files changed, 16 insertions, 0 deletions

diff --git a/apps/plugins/lua/strstr.c b/apps/plugins/lua/strstr.c
new file mode 100644
index 0000000000..2db47f4adf
--- /dev/null
+++ b/apps/plugins/lua/strstr.c
@@ -0,0 +1,16 @@
+#include "rocklibc.h"
+
+char *strstr(const char *haystack, const char *needle) {
+  size_t nl=strlen(needle);
+  size_t hl=strlen(haystack);
+  int i;
+  if (!nl) goto found;
+  if (nl>hl) return 0;
+  for (i=hl-nl+1; __likely(i); --i) {
+    if (*haystack==*needle && !memcmp(haystack,needle,nl))
+found:
+      return (char*)haystack;
+    ++haystack;
+  }
+  return 0;
+}