Initial commit of llgo third_party.
llvm-svn: 222858
diff --git a/llgo/third_party/gofrontend/libgo/runtime/go-int-to-string.c b/llgo/third_party/gofrontend/libgo/runtime/go-int-to-string.c
new file mode 100644
index 0000000..d90b1dd
--- /dev/null
+++ b/llgo/third_party/gofrontend/libgo/runtime/go-int-to-string.c
@@ -0,0 +1,69 @@
+/* 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 "runtime.h"
+#include "arch.h"
+#include "malloc.h"
+
+String
+__go_int_to_string (intgo v)
+{
+ char buf[4];
+ int len;
+ unsigned char *retdata;
+ String ret;
+
+ /* A negative value is not valid UTF-8; turn it into the replacement
+ character. */
+ if (v < 0)
+ v = 0xfffd;
+
+ 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 the value is a surrogate pair, which is invalid in UTF-8,
+ turn it into the replacement character. */
+ if (v >= 0xd800 && v < 0xe000)
+ 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, 0, FlagNoScan);
+ __builtin_memcpy (retdata, buf, len);
+ ret.str = retdata;
+ ret.len = len;
+
+ return ret;
+}