Subversion Repositories openrisc

// Copyright 2011 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 (
        "bufio"
        "bytes"
        "exp/norm"
        "flag"
        "fmt"
        "io"
        "log"
        "net/http"
        "os"
        "path"
        "regexp"
        "runtime"
        "strconv"
        "strings"
        "time"
        "unicode/utf8"
)

func main() {
        flag.Parse()
        loadTestData()
        CharacterByCharacterTests()
        StandardTests()
        PerformanceTest()
        if errorCount == 0 {
                fmt.Println("PASS")
        }
}

const file = "NormalizationTest.txt"

var url = flag.String("url",
        "http://www.unicode.org/Public/6.0.0/ucd/"+file,
        "URL of Unicode database directory")
var localFiles = flag.Bool("local",
        false,
        "data files have been copied to the current directory; for debugging only")

var logger = log.New(os.Stderr, "", log.Lshortfile)

// This regression test runs the test set in NormalizationTest.txt
// (taken from http://www.unicode.org/Public/6.0.0/ucd/).
//
// NormalizationTest.txt has form:
// @Part0 # Specific cases
// #
// 1E0A;1E0A;0044 0307;1E0A;0044 0307; # (Ḋ; Ḋ; D◌̇; Ḋ; D◌̇; ) LATIN CAPITAL LETTER D WITH DOT ABOVE
// 1E0C;1E0C;0044 0323;1E0C;0044 0323; # (Ḍ; Ḍ; D◌̣; Ḍ; D◌̣; ) LATIN CAPITAL LETTER D WITH DOT BELOW
//
// Each test has 5 columns (c1, c2, c3, c4, c5), where 
// (c1, c2, c3, c4, c5) == (c1, NFC(c1), NFD(c1), NFKC(c1), NFKD(c1))
//
// CONFORMANCE:
// 1. The following invariants must be true for all conformant implementations
//
//    NFC
//      c2 ==  NFC(c1) ==  NFC(c2) ==  NFC(c3)
//      c4 ==  NFC(c4) ==  NFC(c5)
//
//    NFD
//      c3 ==  NFD(c1) ==  NFD(c2) ==  NFD(c3)
//      c5 ==  NFD(c4) ==  NFD(c5)
//
//    NFKC
//      c4 == NFKC(c1) == NFKC(c2) == NFKC(c3) == NFKC(c4) == NFKC(c5)
//
//    NFKD
//      c5 == NFKD(c1) == NFKD(c2) == NFKD(c3) == NFKD(c4) == NFKD(c5)
//
// 2. For every code point X assigned in this version of Unicode that is not
//    specifically listed in Part 1, the following invariants must be true
//    for all conformant implementations:
//
//      X == NFC(X) == NFD(X) == NFKC(X) == NFKD(X)
//

// Column types.
const (
        cRaw = iota
        cNFC
        cNFD
        cNFKC
        cNFKD
        cMaxColumns
)

// Holds data from NormalizationTest.txt
var part []Part

type Part struct {
        name   string
        number int
        tests  []Test
}

type Test struct {
        name   string
        partnr int
        number int
        r      rune                // used for character by character test
        cols   [cMaxColumns]string // Each has 5 entries, see below.
}

func (t Test) Name() string {
        if t.number < 0 {
                return part[t.partnr].name
        }
        return fmt.Sprintf("%s:%d", part[t.partnr].name, t.number)
}

var partRe = regexp.MustCompile(`@Part(\d) # (.*)\n$`)
var testRe = regexp.MustCompile(`^` + strings.Repeat(`([\dA-F ]+);`, 5) + ` # (.*)\n?$`)

var counter int

// Load the data form NormalizationTest.txt
func loadTestData() {
        if *localFiles {
                pwd, _ := os.Getwd()
                *url = "file://" + path.Join(pwd, file)
        }
        t := &http.Transport{}
        t.RegisterProtocol("file", http.NewFileTransport(http.Dir("/")))
        c := &http.Client{Transport: t}
        resp, err := c.Get(*url)
        if err != nil {
                logger.Fatal(err)
        }
        if resp.StatusCode != 200 {
                logger.Fatal("bad GET status for "+file, resp.Status)
        }
        f := resp.Body
        defer f.Close()
        input := bufio.NewReader(f)
        for {
                line, err := input.ReadString('\n')
                if err != nil {
                        if err == io.EOF {
                                break
                        }
                        logger.Fatal(err)
                }
                if len(line) == 0 || line[0] == '#' {
                        continue
                }
                m := partRe.FindStringSubmatch(line)
                if m != nil {
                        if len(m) < 3 {
                                logger.Fatal("Failed to parse Part: ", line)
                        }
                        i, err := strconv.Atoi(m[1])
                        if err != nil {
                                logger.Fatal(err)
                        }
                        name := m[2]
                        part = append(part, Part{name: name[:len(name)-1], number: i})
                        continue
                }
                m = testRe.FindStringSubmatch(line)
                if m == nil || len(m) < 7 {
                        logger.Fatalf(`Failed to parse: "%s" result: %#v`, line, m)
                }
                test := Test{name: m[6], partnr: len(part) - 1, number: counter}
                counter++
                for j := 1; j < len(m)-1; j++ {
                        for _, split := range strings.Split(m[j], " ") {
                                r, err := strconv.ParseUint(split, 16, 64)
                                if err != nil {
                                        logger.Fatal(err)
                                }
                                if test.r == 0 {
                                        // save for CharacterByCharacterTests
                                        test.r = rune(r)
                                }
                                var buf [utf8.UTFMax]byte
                                sz := utf8.EncodeRune(buf[:], rune(r))
                                test.cols[j-1] += string(buf[:sz])
                        }
                }
                part := &part[len(part)-1]
                part.tests = append(part.tests, test)
        }
}

var fstr = []string{"NFC", "NFD", "NFKC", "NFKD"}

var errorCount int

func cmpResult(t *Test, name string, f norm.Form, gold, test, result string) {
        if gold != result {
                errorCount++
                if errorCount > 20 {
                        return
                }
                st, sr, sg := []rune(test), []rune(result), []rune(gold)
                logger.Printf("%s:%s: %s(%X)=%X; want:%X: %s",
                        t.Name(), name, fstr[f], st, sr, sg, t.name)
        }
}

func cmpIsNormal(t *Test, name string, f norm.Form, test string, result, want bool) {
        if result != want {
                errorCount++
                if errorCount > 20 {
                        return
                }
                logger.Printf("%s:%s: %s(%X)=%v; want: %v", t.Name(), name, fstr[f], []rune(test), result, want)
        }
}

func doTest(t *Test, f norm.Form, gold, test string) {
        result := f.Bytes([]byte(test))
        cmpResult(t, "Bytes", f, gold, test, string(result))
        for i := range test {
                out := f.Append(f.Bytes([]byte(test[:i])), []byte(test[i:])...)
                cmpResult(t, fmt.Sprintf(":Append:%d", i), f, gold, test, string(out))
        }
        cmpIsNormal(t, "IsNormal", f, test, f.IsNormal([]byte(test)), test == gold)
}

func doConformanceTests(t *Test, partn int) {
        for i := 0; i <= 2; i++ {
                doTest(t, norm.NFC, t.cols[1], t.cols[i])
                doTest(t, norm.NFD, t.cols[2], t.cols[i])
                doTest(t, norm.NFKC, t.cols[3], t.cols[i])
                doTest(t, norm.NFKD, t.cols[4], t.cols[i])
        }
        for i := 3; i <= 4; i++ {
                doTest(t, norm.NFC, t.cols[3], t.cols[i])
                doTest(t, norm.NFD, t.cols[4], t.cols[i])
                doTest(t, norm.NFKC, t.cols[3], t.cols[i])
                doTest(t, norm.NFKD, t.cols[4], t.cols[i])
        }
}

func CharacterByCharacterTests() {
        tests := part[1].tests
        var last rune = 0
        for i := 0; i <= len(tests); i++ { // last one is special case
                var r rune
                if i == len(tests) {
                        r = 0x2FA1E // Don't have to go to 0x10FFFF
                } else {
                        r = tests[i].r
                }
                for last++; last < r; last++ {
                        // Check all characters that were not explicitly listed in the test.
                        t := &Test{partnr: 1, number: -1}
                        char := string(last)
                        doTest(t, norm.NFC, char, char)
                        doTest(t, norm.NFD, char, char)
                        doTest(t, norm.NFKC, char, char)
                        doTest(t, norm.NFKD, char, char)
                }
                if i < len(tests) {
                        doConformanceTests(&tests[i], 1)
                }
        }
}

func StandardTests() {
        for _, j := range []int{0, 2, 3} {
                for _, test := range part[j].tests {
                        doConformanceTests(&test, j)
                }
        }
}

// PerformanceTest verifies that normalization is O(n). If any of the
// code does not properly check for maxCombiningChars, normalization
// may exhibit O(n**2) behavior.
func PerformanceTest() {
        runtime.GOMAXPROCS(2)
        success := make(chan bool, 1)
        go func() {
                buf := bytes.Repeat([]byte("\u035D"), 1024*1024)
                buf = append(buf, "\u035B"...)
                norm.NFC.Append(nil, buf...)
                success <- true
        }()
        timeout := time.After(1 * time.Second)
        select {
        case <-success:
                // test completed before the timeout
        case <-timeout:
                errorCount++
                logger.Printf(`unexpectedly long time to complete PerformanceTest`)
        }
}