libgo: update to Go 1.8 release candidate 1

    
    Compiler changes:
      * Change map assignment to use mapassign and assign value directly.
      * Change string iteration to use decoderune, faster for ASCII strings.
      * Change makeslice to take int, and use makeslice64 for larger values.
      * Add new noverflow field to hmap struct used for maps.
    
    Unresolved problems, to be fixed later:
      * Commented out test in go/types/sizes_test.go that doesn't compile.
      * Commented out reflect.TestStructOf test for padding after zero-sized field.
    
    Reviewed-on: https://go-review.googlesource.com/35231

gotools/:
	Updates for Go 1.8rc1.
	* Makefile.am (go_cmd_go_files): Add bug.go.
	(s-zdefaultcc): Write defaultPkgConfig.
	* Makefile.in: Rebuild.

From-SVN: r244456

1 files changed, 130 insertions, 0 deletions

diff --git a/libgo/go/compress/gzip/example_test.go b/libgo/go/compress/gzip/example_test.go
new file mode 100644
index 0000000..4764bcb
--- /dev/null
+++ b/libgo/go/compress/gzip/example_test.go
@@ -0,0 +1,130 @@
+// Copyright 2016 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.
+
+// +build ignore
+
+package gzip_test
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io"
+	"log"
+	"os"
+	"time"
+)
+
+func Example_writerReader() {
+	var buf bytes.Buffer
+	zw := gzip.NewWriter(&buf)
+
+	// Setting the Header fields is optional.
+	zw.Name = "a-new-hope.txt"
+	zw.Comment = "an epic space opera by George Lucas"
+	zw.ModTime = time.Date(1977, time.May, 25, 0, 0, 0, 0, time.UTC)
+
+	_, err := zw.Write([]byte("A long time ago in a galaxy far, far away..."))
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if err := zw.Close(); err != nil {
+		log.Fatal(err)
+	}
+
+	zr, err := gzip.NewReader(&buf)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Printf("Name: %s\nComment: %s\nModTime: %s\n\n", zr.Name, zr.Comment, zr.ModTime.UTC())
+
+	if _, err := io.Copy(os.Stdout, zr); err != nil {
+		log.Fatal(err)
+	}
+
+	if err := zr.Close(); err != nil {
+		log.Fatal(err)
+	}
+
+	// Output:
+	// Name: a-new-hope.txt
+	// Comment: an epic space opera by George Lucas
+	// ModTime: 1977-05-25 00:00:00 +0000 UTC
+	//
+	// A long time ago in a galaxy far, far away...
+}
+
+func ExampleReader_Multistream() {
+	var buf bytes.Buffer
+	zw := gzip.NewWriter(&buf)
+
+	var files = []struct {
+		name    string
+		comment string
+		modTime time.Time
+		data    string
+	}{
+		{"file-1.txt", "file-header-1", time.Date(2006, time.February, 1, 3, 4, 5, 0, time.UTC), "Hello Gophers - 1"},
+		{"file-2.txt", "file-header-2", time.Date(2007, time.March, 2, 4, 5, 6, 1, time.UTC), "Hello Gophers - 2"},
+	}
+
+	for _, file := range files {
+		zw.Name = file.name
+		zw.Comment = file.comment
+		zw.ModTime = file.modTime
+
+		if _, err := zw.Write([]byte(file.data)); err != nil {
+			log.Fatal(err)
+		}
+
+		if err := zw.Close(); err != nil {
+			log.Fatal(err)
+		}
+
+		zw.Reset(&buf)
+	}
+
+	zr, err := gzip.NewReader(&buf)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for {
+		zr.Multistream(false)
+		fmt.Printf("Name: %s\nComment: %s\nModTime: %s\n\n", zr.Name, zr.Comment, zr.ModTime.UTC())
+
+		if _, err := io.Copy(os.Stdout, zr); err != nil {
+			log.Fatal(err)
+		}
+
+		fmt.Print("\n\n")
+
+		err = zr.Reset(&buf)
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+
+	if err := zr.Close(); err != nil {
+		log.Fatal(err)
+	}
+
+	// Output:
+	// Name: file-1.txt
+	// Comment: file-header-1
+	// ModTime: 2006-02-01 03:04:05 +0000 UTC
+	//
+	// Hello Gophers - 1
+	//
+	// Name: file-2.txt
+	// Comment: file-header-2
+	// ModTime: 2007-03-02 04:05:06 +0000 UTC
+	//
+	// Hello Gophers - 2
+}