1 files changed, 28 insertions, 0 deletions
diff --git a/libgo/go/bytes/indexbyte.c b/libgo/go/bytes/indexbyte.c
new file mode 100644
index 000000000..a0a963e93
--- /dev/null
+++ b/libgo/go/bytes/indexbyte.c
@@ -0,0 +1,28 @@
+/* indexbyte.c -- implement bytes.IndexByte for Go.
+
+   Copyright 2009 The Go Authors. All rights reserved.
+   Use of this source code is governed by a BSD-style
+   license that can be found in the LICENSE file.  */
+
+#include <stddef.h>
+
+#include "array.h"
+
+/* This is in C so that the compiler can optimize it appropriately.
+   We deliberately don't split the stack in case it does call the
+   library function, which shouldn't need much stack space.  */
+
+int IndexByte (struct __go_open_array, char)
+  asm ("libgo_bytes.bytes.IndexByte")
+  __attribute__ ((no_split_stack));
+
+int
+IndexByte (struct __go_open_array s, char b)
+{
+  char *p;
+
+  p = __builtin_memchr (s.__values, b, s.__count);
+  if (p == NULL)
+    return -1;
+  return p - (char *) s.__values;
+}