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// Copyright 2012 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 // import "golang.org/x/text/collate/tools/colcmp"
import (
"bytes"
"flag"
"fmt"
"io"
"log"
"os"
"runtime/pprof"
"sort"
"strconv"
"strings"
"text/template"
"time"
"golang.org/x/text/unicode/norm"
)
var (
doNorm = flag.Bool("norm", false, "normalize input strings")
cases = flag.Bool("case", false, "generate case variants")
verbose = flag.Bool("verbose", false, "print results")
debug = flag.Bool("debug", false, "output debug information")
locales = flag.String("locale", "en_US", "the locale to use. May be a comma-separated list for some commands.")
col = flag.String("col", "go", "collator to test")
gold = flag.String("gold", "go", "collator used as the gold standard")
usecmp = flag.Bool("usecmp", false,
`use comparison instead of sort keys when sorting. Must be "test", "gold" or "both"`)
cpuprofile = flag.String("cpuprofile", "", "write cpu profile to file")
exclude = flag.String("exclude", "", "exclude errors that contain any of the characters")
limit = flag.Int("limit", 5000000, "maximum number of samples to generate for one run")
)
func failOnError(err error) {
if err != nil {
log.Panic(err)
}
}
// Test holds test data for testing a locale-collator pair.
// Test also provides functionality that is commonly used by the various commands.
type Test struct {
ctxt *Context
Name string
Locale string
ColName string
Col Collator
UseCompare bool
Input []Input
Duration time.Duration
start time.Time
msg string
count int
}
func (t *Test) clear() {
t.Col = nil
t.Input = nil
}
const (
msgGeneratingInput = "generating input"
msgGeneratingKeys = "generating keys"
msgSorting = "sorting"
)
var lastLen = 0
func (t *Test) SetStatus(msg string) {
if *debug || *verbose {
fmt.Printf("%s: %s...\n", t.Name, msg)
} else if t.ctxt.out != nil {
fmt.Fprint(t.ctxt.out, strings.Repeat(" ", lastLen))
fmt.Fprint(t.ctxt.out, strings.Repeat("\b", lastLen))
fmt.Fprint(t.ctxt.out, msg, "...")
lastLen = len(msg) + 3
fmt.Fprint(t.ctxt.out, strings.Repeat("\b", lastLen))
}
}
// Start is used by commands to signal the start of an operation.
func (t *Test) Start(msg string) {
t.SetStatus(msg)
t.count = 0
t.msg = msg
t.start = time.Now()
}
// Stop is used by commands to signal the end of an operation.
func (t *Test) Stop() (time.Duration, int) {
d := time.Now().Sub(t.start)
t.Duration += d
if *debug || *verbose {
fmt.Printf("%s: %s done. (%.3fs /%dK ops)\n", t.Name, t.msg, d.Seconds(), t.count/1000)
}
return d, t.count
}
// generateKeys generates sort keys for all the inputs.
func (t *Test) generateKeys() {
for i, s := range t.Input {
b := t.Col.Key(s)
t.Input[i].key = b
if *debug {
fmt.Printf("%s (%X): %X\n", string(s.UTF8), s.UTF16, b)
}
}
}
// Sort sorts the inputs. It generates sort keys if this is required by the
// chosen sort method.
func (t *Test) Sort() (tkey, tsort time.Duration, nkey, nsort int) {
if *cpuprofile != "" {
f, err := os.Create(*cpuprofile)
failOnError(err)
pprof.StartCPUProfile(f)
defer pprof.StopCPUProfile()
}
if t.UseCompare || t.Col.Key(t.Input[0]) == nil {
t.Start(msgSorting)
sort.Sort(&testCompare{*t})
tsort, nsort = t.Stop()
} else {
t.Start(msgGeneratingKeys)
t.generateKeys()
t.count = len(t.Input)
tkey, nkey = t.Stop()
t.Start(msgSorting)
sort.Sort(t)
tsort, nsort = t.Stop()
}
return
}
func (t *Test) Swap(a, b int) {
t.Input[a], t.Input[b] = t.Input[b], t.Input[a]
}
func (t *Test) Less(a, b int) bool {
t.count++
return bytes.Compare(t.Input[a].key, t.Input[b].key) == -1
}
func (t Test) Len() int {
return len(t.Input)
}
type testCompare struct {
Test
}
func (t *testCompare) Less(a, b int) bool {
t.count++
return t.Col.Compare(t.Input[a], t.Input[b]) == -1
}
type testRestore struct {
Test
}
func (t *testRestore) Less(a, b int) bool {
return t.Input[a].index < t.Input[b].index
}
// GenerateInput generates input phrases for the locale tested by t.
func (t *Test) GenerateInput() {
t.Input = nil
if t.ctxt.lastLocale != t.Locale {
gen := phraseGenerator{}
gen.init(t.Locale)
t.SetStatus(msgGeneratingInput)
t.ctxt.lastInput = nil // allow the previous value to be garbage collected.
t.Input = gen.generate(*doNorm)
t.ctxt.lastInput = t.Input
t.ctxt.lastLocale = t.Locale
} else {
t.Input = t.ctxt.lastInput
for i := range t.Input {
t.Input[i].key = nil
}
sort.Sort(&testRestore{*t})
}
}
// Context holds all tests and settings translated from command line options.
type Context struct {
test []*Test
last *Test
lastLocale string
lastInput []Input
out io.Writer
}
func (ts *Context) Printf(format string, a ...interface{}) {
ts.assertBuf()
fmt.Fprintf(ts.out, format, a...)
}
func (ts *Context) Print(a ...interface{}) {
ts.assertBuf()
fmt.Fprint(ts.out, a...)
}
// assertBuf sets up an io.Writer for ouput, if it doesn't already exist.
// In debug and verbose mode, output is buffered so that the regular output
// will not interfere with the additional output. Otherwise, output is
// written directly to stdout for a more responsive feel.
func (ts *Context) assertBuf() {
if ts.out != nil {
return
}
if *debug || *verbose {
ts.out = &bytes.Buffer{}
} else {
ts.out = os.Stdout
}
}
// flush flushes the contents of ts.out to stdout, if it is not stdout already.
func (ts *Context) flush() {
if ts.out != nil {
if _, ok := ts.out.(io.ReadCloser); !ok {
io.Copy(os.Stdout, ts.out.(io.Reader))
}
}
}
// parseTests creates all tests from command lines and returns
// a Context to hold them.
func parseTests() *Context {
ctxt := &Context{}
colls := strings.Split(*col, ",")
for _, loc := range strings.Split(*locales, ",") {
loc = strings.TrimSpace(loc)
for _, name := range colls {
name = strings.TrimSpace(name)
col := getCollator(name, loc)
ctxt.test = append(ctxt.test, &Test{
ctxt: ctxt,
Locale: loc,
ColName: name,
UseCompare: *usecmp,
Col: col,
})
}
}
return ctxt
}
func (c *Context) Len() int {
return len(c.test)
}
func (c *Context) Test(i int) *Test {
if c.last != nil {
c.last.clear()
}
c.last = c.test[i]
return c.last
}
func parseInput(args []string) []Input {
input := []Input{}
for _, s := range args {
rs := []rune{}
for len(s) > 0 {
var r rune
r, _, s, _ = strconv.UnquoteChar(s, '\'')
rs = append(rs, r)
}
s = string(rs)
if *doNorm {
s = norm.NFD.String(s)
}
input = append(input, makeInputString(s))
}
return input
}
// A Command is an implementation of a colcmp command.
type Command struct {
Run func(cmd *Context, args []string)
Usage string
Short string
Long string
}
func (cmd Command) Name() string {
return strings.SplitN(cmd.Usage, " ", 2)[0]
}
var commands = []*Command{
cmdSort,
cmdBench,
cmdRegress,
}
const sortHelp = `
Sort sorts a given list of strings. Strings are separated by whitespace.
`
var cmdSort = &Command{
Run: runSort,
Usage: "sort <string>*",
Short: "sort a given list of strings",
Long: sortHelp,
}
func runSort(ctxt *Context, args []string) {
input := parseInput(args)
if len(input) == 0 {
log.Fatalf("Nothing to sort.")
}
if ctxt.Len() > 1 {
ctxt.Print("COLL LOCALE RESULT\n")
}
for i := 0; i < ctxt.Len(); i++ {
t := ctxt.Test(i)
t.Input = append(t.Input, input...)
t.Sort()
if ctxt.Len() > 1 {
ctxt.Printf("%-5s %-5s ", t.ColName, t.Locale)
}
for _, s := range t.Input {
ctxt.Print(string(s.UTF8), " ")
}
ctxt.Print("\n")
}
}
const benchHelp = `
Bench runs a benchmark for the given list of collator implementations.
If no collator implementations are given, the go collator will be used.
`
var cmdBench = &Command{
Run: runBench,
Usage: "bench",
Short: "benchmark a given list of collator implementations",
Long: benchHelp,
}
func runBench(ctxt *Context, args []string) {
ctxt.Printf("%-7s %-5s %-6s %-24s %-24s %-5s %s\n", "LOCALE", "COLL", "N", "KEYS", "SORT", "AVGLN", "TOTAL")
for i := 0; i < ctxt.Len(); i++ {
t := ctxt.Test(i)
ctxt.Printf("%-7s %-5s ", t.Locale, t.ColName)
t.GenerateInput()
ctxt.Printf("%-6s ", fmt.Sprintf("%dK", t.Len()/1000))
tkey, tsort, nkey, nsort := t.Sort()
p := func(dur time.Duration, n int) {
s := ""
if dur > 0 {
s = fmt.Sprintf("%6.3fs ", dur.Seconds())
if n > 0 {
s += fmt.Sprintf("%15s", fmt.Sprintf("(%4.2f ns/op)", float64(dur)/float64(n)))
}
}
ctxt.Printf("%-24s ", s)
}
p(tkey, nkey)
p(tsort, nsort)
total := 0
for _, s := range t.Input {
total += len(s.key)
}
ctxt.Printf("%-5d ", total/t.Len())
ctxt.Printf("%6.3fs\n", t.Duration.Seconds())
if *debug {
for _, s := range t.Input {
fmt.Print(string(s.UTF8), " ")
}
fmt.Println()
}
}
}
const regressHelp = `
Regress runs a monkey test by comparing the results of randomly generated tests
between two implementations of a collator. The user may optionally pass a list
of strings to regress against instead of the default test set.
`
var cmdRegress = &Command{
Run: runRegress,
Usage: "regress -gold=<col> -test=<col> [string]*",
Short: "run a monkey test between two collators",
Long: regressHelp,
}
const failedKeyCompare = `
%s:%d: incorrect comparison result for input:
a: %q (%.4X)
key: %s
b: %q (%.4X)
key: %s
Compare(a, b) = %d; want %d.
gold keys:
a: %s
b: %s
`
const failedCompare = `
%s:%d: incorrect comparison result for input:
a: %q (%.4X)
b: %q (%.4X)
Compare(a, b) = %d; want %d.
`
func keyStr(b []byte) string {
buf := &bytes.Buffer{}
for _, v := range b {
fmt.Fprintf(buf, "%.2X ", v)
}
return buf.String()
}
func runRegress(ctxt *Context, args []string) {
input := parseInput(args)
for i := 0; i < ctxt.Len(); i++ {
t := ctxt.Test(i)
if len(input) > 0 {
t.Input = append(t.Input, input...)
} else {
t.GenerateInput()
}
t.Sort()
count := 0
gold := getCollator(*gold, t.Locale)
for i := 1; i < len(t.Input); i++ {
ia := t.Input[i-1]
ib := t.Input[i]
if bytes.IndexAny(ib.UTF8, *exclude) != -1 {
i++
continue
}
if bytes.IndexAny(ia.UTF8, *exclude) != -1 {
continue
}
goldCmp := gold.Compare(ia, ib)
if cmp := bytes.Compare(ia.key, ib.key); cmp != goldCmp {
count++
a := string(ia.UTF8)
b := string(ib.UTF8)
fmt.Printf(failedKeyCompare, t.Locale, i-1, a, []rune(a), keyStr(ia.key), b, []rune(b), keyStr(ib.key), cmp, goldCmp, keyStr(gold.Key(ia)), keyStr(gold.Key(ib)))
} else if cmp := t.Col.Compare(ia, ib); cmp != goldCmp {
count++
a := string(ia.UTF8)
b := string(ib.UTF8)
fmt.Printf(failedCompare, t.Locale, i-1, a, []rune(a), b, []rune(b), cmp, goldCmp)
}
}
if count > 0 {
ctxt.Printf("Found %d inconsistencies in %d entries.\n", count, t.Len()-1)
}
}
}
const helpTemplate = `
colcmp is a tool for testing and benchmarking collation
Usage: colcmp command [arguments]
The commands are:
{{range .}}
{{.Name | printf "%-11s"}} {{.Short}}{{end}}
Use "col help [topic]" for more information about that topic.
`
const detailedHelpTemplate = `
Usage: colcmp {{.Usage}}
{{.Long | trim}}
`
func runHelp(args []string) {
t := template.New("help")
t.Funcs(template.FuncMap{"trim": strings.TrimSpace})
if len(args) < 1 {
template.Must(t.Parse(helpTemplate))
failOnError(t.Execute(os.Stderr, &commands))
} else {
for _, cmd := range commands {
if cmd.Name() == args[0] {
template.Must(t.Parse(detailedHelpTemplate))
failOnError(t.Execute(os.Stderr, cmd))
os.Exit(0)
}
}
log.Fatalf("Unknown command %q. Run 'colcmp help'.", args[0])
}
os.Exit(0)
}
func main() {
flag.Parse()
log.SetFlags(0)
ctxt := parseTests()
if flag.NArg() < 1 {
runHelp(nil)
}
args := flag.Args()[1:]
if flag.Arg(0) == "help" {
runHelp(args)
}
for _, cmd := range commands {
if cmd.Name() == flag.Arg(0) {
cmd.Run(ctxt, args)
ctxt.flush()
return
}
}
runHelp(flag.Args())
}