libgo: Merge from revision 18783:00cce3a34d7e of master library.

This revision was committed January 7, 2014.  The next
revision deleted runtime/mfinal.c.  That will be done in a
subsequent merge.

This merge changes type descriptors to add a zero field,
pointing to a zero value for that type.  This is implemented
as a common variable.

	* go-gcc.cc (Gcc_backend::implicit_variable): Add is_common and
	alignment parameters.  Permit init parameter to be NULL.

From-SVN: r211249

3 files changed, 26 insertions, 2 deletions

diff --git a/libgo/go/bytes/bytes.go b/libgo/go/bytes/bytes.go
index 01a5d9ae4ec..644bf75b894 100644
--- a/libgo/go/bytes/bytes.go
+++ b/libgo/go/bytes/bytes.go
@@ -265,8 +265,8 @@ func Fields(s []byte) [][]byte {
 
 // FieldsFunc interprets s as a sequence of UTF-8-encoded Unicode code points.
 // It splits the slice s at each run of code points c satisfying f(c) and
-// returns a slice of subslices of s.  If no code points in s satisfy f(c), an
-// empty slice is returned.
+// returns a slice of subslices of s.  If all code points in s satisfy f(c), or
+// len(s) == 0, an empty slice is returned.
 func FieldsFunc(s []byte, f func(rune) bool) [][]byte {
 	n := 0
 	inField := false
diff --git a/libgo/go/bytes/bytes_test.go b/libgo/go/bytes/bytes_test.go
index ab5da4fbf08..808655a4a48 100644
--- a/libgo/go/bytes/bytes_test.go
+++ b/libgo/go/bytes/bytes_test.go
@@ -1073,6 +1073,8 @@ var TitleTests = []TitleTest{
 	{"123a456", "123a456"},
 	{"double-blind", "Double-Blind"},
 	{"ÿøû", "Ÿøû"},
+	{"with_underscore", "With_underscore"},
+	{"unicode \xe2\x80\xa8 line separator", "Unicode \xe2\x80\xa8 Line Separator"},
 }
 
 func TestTitle(t *testing.T) {
@@ -1160,6 +1162,24 @@ func TestBufferTruncateOutOfRange(t *testing.T) {
 	b.Truncate(20)
 }
 
+var containsTests = []struct {
+	b, subslice []byte
+	want        bool
+}{
+	{[]byte("hello"), []byte("hel"), true},
+	{[]byte("日本語"), []byte("日本"), true},
+	{[]byte("hello"), []byte("Hello, world"), false},
+	{[]byte("東京"), []byte("京東"), false},
+}
+
+func TestContains(t *testing.T) {
+	for _, tt := range containsTests {
+		if got := Contains(tt.b, tt.subslice); got != tt.want {
+			t.Errorf("Contains(%q, %q) = %v, want %v", tt.b, tt.subslice, got, tt.want)
+		}
+	}
+}
+
 var makeFieldsInput = func() []byte {
 	x := make([]byte, 1<<20)
 	// Input is ~10% space, ~10% 2-byte UTF-8, rest ASCII non-space.
diff --git a/libgo/go/bytes/compare_test.go b/libgo/go/bytes/compare_test.go
index 0a36f5ad39b..63522374ee0 100644
--- a/libgo/go/bytes/compare_test.go
+++ b/libgo/go/bytes/compare_test.go
@@ -1,3 +1,7 @@
+// Copyright 2013 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.
+
 package bytes_test
 
 import (