From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified
 gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream
 tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
---
 libgo/runtime/go-rune.c | 77 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 libgo/runtime/go-rune.c

(limited to 'libgo/runtime/go-rune.c')

diff --git a/libgo/runtime/go-rune.c b/libgo/runtime/go-rune.c
new file mode 100644
index 000000000..7e31eb8d6
--- /dev/null
+++ b/libgo/runtime/go-rune.c
@@ -0,0 +1,77 @@
+/* go-rune.c -- rune functions for Go.
+
+   Copyright 2009, 2010 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 "go-string.h"
+
+/* Get a character from the UTF-8 string STR, of length LEN.  Store
+   the Unicode character, if any, in *RUNE.  Return the number of
+   characters used from STR.  */
+
+int
+__go_get_rune (const unsigned char *str, size_t len, int *rune)
+{
+  int c, c1, c2, c3;
+
+  /* Default to the "replacement character".  */
+  *rune = 0xfffd;
+
+  if (len <= 0)
+    return 1;
+
+  c = *str;
+  if (c <= 0x7f)
+    {
+      *rune = c;
+      return 1;
+    }
+
+  if (len <= 1)
+    return 1;
+
+  c1 = str[1];
+  if ((c & 0xe0) == 0xc0
+      && (c1 & 0xc0) == 0x80)
+    {
+      *rune = (((c & 0x1f) << 6)
+	       + (c1 & 0x3f));
+      return 2;
+    }
+
+  if (len <= 2)
+    return 1;
+
+  c2 = str[2];
+  if ((c & 0xf0) == 0xe0
+      && (c1 & 0xc0) == 0x80
+      && (c2 & 0xc0) == 0x80)
+    {
+      *rune = (((c & 0xf) << 12)
+	       + ((c1 & 0x3f) << 6)
+	       + (c2 & 0x3f));
+      return 3;
+    }
+
+  if (len <= 3)
+    return 1;
+
+  c3 = str[3];
+  if ((c & 0xf8) == 0xf0
+      && (c1 & 0xc0) == 0x80
+      && (c2 & 0xc0) == 0x80
+      && (c3 & 0xc0) == 0x80)
+    {
+      *rune = (((c & 0x7) << 18)
+	       + ((c1 & 0x3f) << 12)
+	       + ((c2 & 0x3f) << 6)
+	       + (c3 & 0x3f));
+      return 4;
+    }
+
+  /* Invalid encoding.  Return 1 so that we advance.  */
+  return 1;
+}
-- 
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