tutorial code:

tweak a program or two
delete unused programs
add shell script to run them all

R=gri
DELTA=213  (62 added, 147 deleted, 4 changed)
OCL=15435
CL=15437

doc/progs/235A.go

-// 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 main
-
-type INT uint64
-
-func Multiplier(f INT, in, out *chan INT) {
-	for {
-		out -< (f * <-in);
-	}
-}
-
-func min(a, b INT) INT {
-	if a < b { return a }
-	return b;
-}
-
-func main() {
-	c2i := new(chan INT, 100);
-	c2o := new(chan INT);
-	c3i := new(chan INT, 100);
-	c3o := new(chan INT);
-	c5i := new(chan INT, 100);
-	c5o := new(chan INT);
-
-	go Multiplier(2, c2i, c2o);
-	go Multiplier(3, c3i, c3o);
-	go Multiplier(5, c5i, c5o);
-
-	var x INT = 1;
-
-	x2 := x;
-	x3 := x;
-	x5 := x;
-
-	for i := 0; i < 100; i++ {
-		print(x, "\n");
-
-		c2i -< x;
-		c3i -< x;
-		c5i -< x;
-
-		if x2 == x { x2 = <- c2o }
-		if x3 == x { x3 = <- c3o }
-		if x5 == x { x5 = <- c5o }
-
-		x = min(min(x2, x3), x5);
-	}
-	sys.exit(0);
-}

doc/progs/235B.go

-// 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 main
-
-type INT uint64
-
-func Multiplier(f INT) (in, out *chan INT) {
-	inc := new(chan INT, 100);
-	outc := new(chan INT);
-	go func(f INT, in, out *chan INT) {
-		for {
-			out -< f * <-in;
-		}
-	}(f, inc, outc)
-	return inc, outc
-}
-
-func min(a, b INT) INT {
-	if a < b { return a }
-	return b;
-}
-
-func main() {
-	c2i, c2o := Multiplier(2);
-	c3i, c3o := Multiplier(3);
-	c5i, c5o := Multiplier(5);
-
-	var x INT = 1;
-
-	x2, x3, x5 := x, x, x;
-
-	for i := 0; i < 100; i++ {
-		print(x, "\n");
-
-		c2i -< x;
-		c3i -< x;
-		c5i -< x;
-
-		if x2 == x { x2 = <- c2o }
-		if x3 == x { x3 = <- c3o }
-		if x5 == x { x5 = <- c5o }
-
-		x = min(min(x2, x3), x5);
-	}
-	sys.exit(0);
-}

doc/progs/235_gen.go

-// 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 main
-
-type INT uint64
-
-func Multiplier(f INT) (in, out *chan INT) {
-	in = new(chan INT, 100);
-	out = new(chan INT, 100);
-	go func(in, out *chan INT, f INT) {
-		for {
-			out -< f * <- in;
-		}
-	}(in, out, f);
-	return in, out;
-}
-
-
-func min(xs *[]INT) INT {
-	m := xs[0];
-	for i := 1; i < len(xs); i++ {
-		if xs[i] < m {
-			m = xs[i];
-		}
-	}
-	return m;
-}
-
-
-func main() {
-	F := []INT{2, 3, 5};
-	const n = len(F);
-
-	x := INT(1);
-	ins := new([]*chan INT, n);
-	outs := new([]*chan INT, n);
-	xs := new([]INT, n);
-	for i := 0; i < n; i++ {
-		ins[i], outs[i] = Multiplier(F[i]);
-		xs[i] = x;
-	}
-
-	for i := 0; i < 100; i++ {
-		print(x, "\n");
-		t := min(xs);
-		for i := 0; i < n; i++ {
-			ins[i] -< x;
-		}
-
-		for i := 0; i < n; i++ {
-			if xs[i] == x { xs[i] = <- outs[i]; }
-		}
-		
-		x = min(xs);
-	}
-	sys.exit(0);
-}

doc/progs/helloworld3.go

@@ -7,7 +7,7 @@ package main
 import FD "fd"
 
 func main() {
-	hello := []byte{'h', 'e', 'l', 'l', 'o', ', ', ' ', 'w', 'o', 'r', 'l', 'd', '\n'};
+	hello := []byte{'h', 'e', 'l', 'l', 'o', ',', ' ', 'w', 'o', 'r', 'l', 'd', '\n'};
 	FD.Stdout.Write(&hello);
 	fd,  errno := FD.Open("/does/not/exist",  0,  0);
 	if fd == nil {

doc/progs/run

+#!/bin/bash
+# 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.
+
+rm -f *.6
+
+for i in \
+	fd.go \
+	helloworld.go \
+	helloworld2.go \
+	helloworld3.go \
+	echo.go \
+	cat.go \
+	cat_rot13.go \
+	sum.go \
+	sort.go \
+	sortmain.go \
+	sieve.go \
+	sieve1.go \
+	server1.go \
+; do
+	BASE=$(basename $i .go)
+
+	6g $i
+done
+
+function testit {
+	6l $1.6
+	x=$(echo $(6.out $2 2>&1))  # extra echo canonicalizes
+	if [ "$x" != "$3" ]
+	then
+		echo $1 failed: '"'$x'"' is not '"'$3'"'
+	fi
+}
+
+function testitpipe {
+	6l $1.6
+	x=$(echo $(6.out | $2 2>&1))  # extra echo canonicalizes
+	if [ "$x" != "$3" ]
+	then
+		echo $1 failed: '"'$x'"' is not '"'$3'"'
+	fi
+}
+
+
+testit helloworld "" "Hello, world; or Καλημέρα κόσμε; or こんにちは 世界"
+testit helloworld2 "" "Hello, world; or Καλημέρα κόσμε; or こんにちは 世界"
+testit helloworld3 "" "hello, world can't open file; errno=2"
+testit echo "hello, world" "hello, world"
+testit sum "" "6"
+
+alphabet=abcdefghijklmnopqrstuvwxyz
+rot13=nopqrstuvwxyzabcdefghijklm
+echo $alphabet | testit cat "" $alphabet
+echo $alphabet | testit cat_rot13 "--rot13" $rot13
+echo $rot13 | testit cat_rot13 "--rot13" $alphabet
+
+testit sortmain "" "Sunday Monday Tuesday Thursday Friday"
+
+testitpipe sieve "sed 10q" "2 3 5 7 11 13 17 19 23 29"
+testitpipe sieve "sed 10q" "2 3 5 7 11 13 17 19 23 29"
+
+# server hangs; don't run it
+testit server1 "" ""

doc/progs/server1.go

@@ -27,9 +27,9 @@ func Server(op *BinOp, service *chan *Request, quit *chan bool) {
 	}
 }
 
-func StartServer(op *BinOp) (servch *chan *Request, quitch *chan bool) {
-	service := new(chan *Request);
-	quit := new(chan bool);
+func StartServer(op *BinOp) (service *chan *Request, quit *chan bool) {
+	service = new(chan *Request);
+	quit = new(chan bool);
 	go Server(op, service, quit);
 	return service, quit;
 }