mirror of
https://github.com/golang/go
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204 lines
4.7 KiB
Go
204 lines
4.7 KiB
Go
/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of "The Computer Language Benchmarks Game" nor the
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name of "The Computer Language Shootout Benchmarks" nor the names of
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its contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/* The Computer Language Benchmarks Game
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* http://shootout.alioth.debian.org/
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*
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* contributed by The Go Authors.
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*/
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package main
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import (
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"flag";
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"fmt";
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"os";
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)
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var n = flag.Int("n", 600, "count")
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type Color int
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const (
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blue Color = iota;
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red;
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yellow;
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)
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func (c Color) String() string {
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return []string{"blue", "red", "yellow"}[c]
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}
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func complement(c1, c2 Color) Color {
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switch c1 << 2 | c2 {
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case blue << 2 | blue:
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return blue
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case blue << 2 | red:
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return yellow
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case blue << 2 | yellow:
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return red
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case red << 2 | blue:
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return yellow
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case red << 2 | red:
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return red
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case red << 2 | yellow:
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return blue
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case yellow << 2 | blue:
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return red
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case yellow << 2 | red:
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return blue
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case yellow << 2 | yellow:
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return yellow
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}
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fmt.Println("invalid colors", c1, c2);
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os.Exit(2);
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return 0
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}
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func printColors(c1, c2 Color) {
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fmt.Printf("%s + %s -> %s\n", c1, c2, complement(c1, c2));
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}
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func printColorTable() {
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printColors(blue, blue);
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printColors(blue, red);
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printColors(blue, yellow);
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printColors(red, blue);
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printColors(red, red);
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printColors(red, yellow);
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printColors(yellow, blue);
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printColors(yellow, red);
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printColors(yellow, yellow);
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}
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type Referee struct {
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rendezCount int;
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cham []*Chameneos;
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rendez chan *Chameneos;
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done chan int;
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}
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func NewReferee() *Referee {
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ref := new(Referee);
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ref.cham = make([]*Chameneos, 0, 100);
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ref.rendez = make(chan *Chameneos);
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ref.done = make(chan int);
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go ref.Serve();
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return ref;
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}
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func (ref *Referee) Serve() {
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for i := 0; i < *n; i++ {
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c1 := <-ref.rendez;
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c2 := <-ref.rendez;
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c1.col, c2.col = complement(c1.col, c2.col), complement(c2.col, c1.col);
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c1.rendez <- c2;
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c2.rendez <- c1;
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}
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for i := 0; i < len(ref.cham); i++ {
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c := <-ref.rendez;
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c.rendez <- nil;
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}
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ref.done <- 1;
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}
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func (ref *Referee) Add(ch *Chameneos) {
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n := len(ref.cham);
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ref.cham = ref.cham[0:n+1];
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ref.cham[n] = ch;
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}
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type Chameneos struct {
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index int;
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col Color;
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rendez chan *Chameneos;
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count int;
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same int;
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ref *Referee;
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}
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func (c *Chameneos) Init(index int, ref *Referee, col Color) *Chameneos {
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c.index = index;
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c.ref = ref;
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c.col = col;
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c.rendez = make(chan *Chameneos);
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go c.Serve();
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return c;
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}
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func (c *Chameneos) Serve() {
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for {
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c.ref.rendez <- c;
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c1 := <- c.rendez;
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if c1 == nil {
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break
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}
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if c1.index == c.index {
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c.same++
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}
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c.count++;
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}
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}
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func play(ref *Referee, color []Color) {
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cham := make([]Chameneos, len(color));
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for i, c := range color {
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fmt.Printf(" %s", c);
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ref.Add(cham[i].Init(i, ref, c));
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}
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fmt.Printf("\n");
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<-ref.done;
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total := 0;
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for i, c := range cham {
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total += c.count;
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fmt.Printf("%d %s\n", c.count, say(c.same));
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}
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fmt.Printf("%s\n", say(total));
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}
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var words = []string{"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"}
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func say(n int) string {
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digits := fmt.Sprint(n);
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s := "";
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for _, c := range digits {
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s += " " + words[c-'0'];
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}
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return s;
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}
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func main() {
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flag.Parse();
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printColorTable();
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fmt.Print("\n");
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play(NewReferee(), []Color{blue, red, yellow});
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fmt.Print("\n");
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play(NewReferee(), []Color{blue, red, yellow, red, yellow, blue, red, yellow, red, blue});
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}
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