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// 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 os
import syscall "syscall"
import os "os"
// FDs are wrappers for file descriptors
export type FD struct {
fd int64
}
export func NewFD(fd int64) *FD {
if fd < 0 {
return nil
}
n := new(FD);
n.fd = fd;
return n;
}
export var (
Stdin = NewFD(0);
Stdout = NewFD(1);
Stderr = NewFD(2);
)
export func Open(name string, mode int64, flags int64) (fd *FD, err *Error) {
var buf [512]byte;
if !StringToBytes(&buf, name) {
return nil, EINVAL
}
r, e := syscall.open(&buf[0], mode, flags);
return NewFD(r), ErrnoToError(e)
}
func (fd *FD) Close() *Error {
if fd == nil {
return EINVAL
}
r, e := syscall.close(fd.fd);
fd.fd = -1; // so it can't be closed again
return ErrnoToError(e)
}
func (fd *FD) Read(b *[]byte) (ret int64, err *Error) {
if fd == nil {
return -1, EINVAL
}
r, e := syscall.read(fd.fd, &b[0], int64(len(b)));
return r, ErrnoToError(e)
}
func (fd *FD) Write(b *[]byte) (ret int64, err *Error) {
if fd == nil {
return -1, EINVAL
}
r, e := syscall.write(fd.fd, &b[0], int64(len(b)));
return r, ErrnoToError(e)
}
func (fd *FD) WriteString(s string) (ret int64, err *Error) {
if fd == nil {
return -1, EINVAL
}
b := new([]byte, len(s)+1);
if !StringToBytes(b, s) {
return -1, EINVAL
}
r, e := syscall.write(fd.fd, &b[0], int64(len(s)));
return r, ErrnoToError(e)
}