Imported Upstream version 59upstream/59

1 files changed, 89 insertions, 0 deletions

diff --git a/doc/progs/file_windows.go b/doc/progs/file_windows.go
new file mode 100644
index 000000000..d5e7c00d3
--- /dev/null
+++ b/doc/progs/file_windows.go
@@ -0,0 +1,89 @@
+// 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.
+
+package file
+
+import (
+	"os"
+	"syscall"
+)
+
+type File struct {
+	fd   syscall.Handle    // file descriptor number
+	name string // file name at Open time
+}
+
+func newFile(fd syscall.Handle, name string) *File {
+	if fd < 0 {
+		return nil
+	}
+	return &File{fd, name}
+}
+
+var (
+	Stdin  = newFile(syscall.Stdin, "/dev/stdin")
+	Stdout = newFile(syscall.Stdout, "/dev/stdout")
+	Stderr = newFile(syscall.Stderr, "/dev/stderr")
+)
+
+func OpenFile(name string, mode int, perm uint32) (file *File, err os.Error) {
+	r, e := syscall.Open(name, mode, perm)
+	if e != 0 {
+		err = os.Errno(e)
+	}
+	return newFile(r, name), err
+}
+
+const (
+	O_RDONLY = syscall.O_RDONLY
+	O_RDWR   = syscall.O_RDWR
+	O_CREATE = syscall.O_CREAT
+	O_TRUNC  = syscall.O_TRUNC
+)
+
+func Open(name string) (file *File, err os.Error) {
+	return OpenFile(name, O_RDONLY, 0)
+}
+
+func Create(name string) (file *File, err os.Error) {
+	return OpenFile(name, O_RDWR|O_CREATE|O_TRUNC, 0666)
+}
+
+func (file *File) Close() os.Error {
+	if file == nil {
+		return os.EINVAL
+	}
+	e := syscall.Close(file.fd)
+	file.fd = syscall.InvalidHandle // so it can't be closed again
+	if e != 0 {
+		return os.Errno(e)
+	}
+	return nil
+}
+
+func (file *File) Read(b []byte) (ret int, err os.Error) {
+	if file == nil {
+		return -1, os.EINVAL
+	}
+	r, e := syscall.Read(file.fd, b)
+	if e != 0 {
+		err = os.Errno(e)
+	}
+	return int(r), err
+}
+
+func (file *File) Write(b []byte) (ret int, err os.Error) {
+	if file == nil {
+		return -1, os.EINVAL
+	}
+	r, e := syscall.Write(file.fd, b)
+	if e != 0 {
+		err = os.Errno(e)
+	}
+	return int(r), err
+}
+
+func (file *File) String() string {
+	return file.name
+}