1 files changed, 60 insertions, 0 deletions
diff --git a/libgo/runtime/go-int-to-string.c b/libgo/runtime/go-int-to-string.c
new file mode 100644
index 000000000..24d729cf8
--- /dev/null
+++ b/libgo/runtime/go-int-to-string.c
@@ -0,0 +1,60 @@
+/* go-int-to-string.c -- convert an integer to a string in 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 "go-string.h"
+#include "runtime.h"
+#include "malloc.h"
+
+struct __go_string
+__go_int_to_string (int v)
+{
+  char buf[4];
+  int len;
+  unsigned char *retdata;
+  struct __go_string ret;
+
+  if (v <= 0x7f)
+    {
+      buf[0] = v;
+      len = 1;
+    }
+  else if (v <= 0x7ff)
+    {
+      buf[0] = 0xc0 + (v >> 6);
+      buf[1] = 0x80 + (v & 0x3f);
+      len = 2;
+    }
+  else
+    {
+      /* If the value is out of range for UTF-8, turn it into the
+	 "replacement character".  */
+      if (v > 0x10ffff)
+	v = 0xfffd;
+
+      if (v <= 0xffff)
+	{
+	  buf[0] = 0xe0 + (v >> 12);
+	  buf[1] = 0x80 + ((v >> 6) & 0x3f);
+	  buf[2] = 0x80 + (v & 0x3f);
+	  len = 3;
+	}
+      else
+	{
+	  buf[0] = 0xf0 + (v >> 18);
+	  buf[1] = 0x80 + ((v >> 12) & 0x3f);
+	  buf[2] = 0x80 + ((v >> 6) & 0x3f);
+	  buf[3] = 0x80 + (v & 0x3f);
+	  len = 4;
+	}
+    }
+
+  retdata = runtime_mallocgc (len, RefNoPointers, 1, 0);
+  __builtin_memcpy (retdata, buf, len);
+  ret.__data = retdata;
+  ret.__length = len;
+
+  return ret;
+}