Imported Upstream version 2011.09.21upstream-weekly/2011.09.21

1 files changed, 62 insertions, 0 deletions

diff --git a/src/pkg/go/token/serialize.go b/src/pkg/go/token/serialize.go
new file mode 100644
index 000000000..80a3323f9
--- /dev/null
+++ b/src/pkg/go/token/serialize.go
@@ -0,0 +1,62 @@
+// Copyright 2011 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 token
+
+import (
+	"gob"
+	"io"
+	"os"
+)
+
+type serializedFile struct {
+	// fields correspond 1:1 to fields with same (lower-case) name in File
+	Name  string
+	Base  int
+	Size  int
+	Lines []int
+	Infos []lineInfo
+}
+
+type serializedFileSet struct {
+	Base  int
+	Files []serializedFile
+}
+
+// Read reads the fileset from r into s; s must not be nil.
+func (s *FileSet) Read(r io.Reader) os.Error {
+	var ss serializedFileSet
+	if err := gob.NewDecoder(r).Decode(&ss); err != nil {
+		return err
+	}
+
+	s.mutex.Lock()
+	s.base = ss.Base
+	files := make([]*File, len(ss.Files))
+	for i := 0; i < len(ss.Files); i++ {
+		f := &ss.Files[i]
+		files[i] = &File{s, f.Name, f.Base, f.Size, f.Lines, f.Infos}
+	}
+	s.files = files
+	s.last = nil
+	s.mutex.Unlock()
+
+	return nil
+}
+
+// Write writes the fileset s to w.
+func (s *FileSet) Write(w io.Writer) os.Error {
+	var ss serializedFileSet
+
+	s.mutex.Lock()
+	ss.Base = s.base
+	files := make([]serializedFile, len(s.files))
+	for i, f := range s.files {
+		files[i] = serializedFile{f.name, f.base, f.size, f.lines, f.infos}
+	}
+	ss.Files = files
+	s.mutex.Unlock()
+
+	return gob.NewEncoder(w).Encode(ss)
+}