update tutorial to new language.

add a section on printing
add a section on allocation

R=rsc
DELTA=500  (278 added, 15 deleted, 207 changed)
OCL=22381
CL=22456

1 files changed, 23 insertions, 23 deletions

diff --git a/doc/progs/fd.go b/doc/progs/fd.go
index 76b784f83..4c3ac1587 100644
--- a/doc/progs/fd.go
+++ b/doc/progs/fd.go
@@ -4,21 +4,21 @@
 
 package fd
 
-import Syscall "syscall"
+import (
+	"os";
+	"syscall";
+)
 
 export type FD struct {
-	fildes	int64;	// file descriptor number
-	name	string;	// file name at Open time
+	fildes  int64;  // file descriptor number
+	name    string; // file name at Open time
 }
 
 func NewFD(fd int64, name string) *FD {
 	if fd < 0 {
 		return nil
 	}
-	n := new(FD);
-	n.fildes = fd;
-	n.name = name;
-	return n
+	return &FD{fd, name}
 }
 
 export var (
@@ -27,36 +27,36 @@ export var (
 	Stderr = NewFD(2, "/dev/stderr");
 )
 
-export func Open(name string, mode int64, perm int64) (fd *FD, errno int64) {
-	r, e := Syscall.open(name, mode, perm);
-	return NewFD(r, name), e
+export func Open(name string, mode int64, perm int64) (fd *FD, err *os.Error) {
+	r, e := syscall.open(name, mode, perm);
+	return NewFD(r, name), os.ErrnoToError(e)
 }
 
-func (fd *FD) Close() int64 {
+func (fd *FD) Close() *os.Error {
 	if fd == nil {
-		return Syscall.EINVAL
+		return os.EINVAL
 	}
-	r, e := Syscall.close(fd.fildes);
+	r, e := syscall.close(fd.fildes);
 	fd.fildes = -1;  // so it can't be closed again
-	return 0
+	return nil
 }
 
-func (fd *FD) Read(b []byte) (ret int64, errno int64) {
+func (fd *FD) Read(b []byte) (ret int, err *os.Error) {
 	if fd == nil {
-		return -1, Syscall.EINVAL
+		return -1, os.EINVAL
 	}
-	r, e := Syscall.read(fd.fildes, &b[0], int64(len(b)));
-	return r, e
+	r, e := syscall.read(fd.fildes, &b[0], int64(len(b)));
+	return int(r), os.ErrnoToError(e)
 }
 
-func (fd *FD) Write(b []byte) (ret int64, errno int64) {
+func (fd *FD) Write(b []byte) (ret int, err *os.Error) {
 	if fd == nil {
-		return -1, Syscall.EINVAL
+		return -1, os.EINVAL
 	}
-	r, e := Syscall.write(fd.fildes, &b[0], int64(len(b)));
-	return r, e
+	r, e := syscall.write(fd.fildes, &b[0], int64(len(b)));
+	return int(r), os.ErrnoToError(e)
 }
 
-func (fd *FD) Name() string {
+func (fd *FD) String() string {
 	return fd.name
 }