134 lines
3.0 KiB
Go
134 lines
3.0 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build ignore
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package main
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import (
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"flag"
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"log"
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"golang.org/x/text/internal/gen"
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"golang.org/x/text/internal/triegen"
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"golang.org/x/text/internal/ucd"
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)
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var outputFile = flag.String("out", "tables.go", "output file")
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func main() {
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gen.Init()
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gen.Repackage("gen_trieval.go", "trieval.go", "bidi")
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gen.Repackage("gen_ranges.go", "ranges_test.go", "bidi")
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genTables()
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}
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// bidiClass names and codes taken from class "bc" in
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// https://www.unicode.org/Public/8.0.0/ucd/PropertyValueAliases.txt
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var bidiClass = map[string]Class{
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"AL": AL, // ArabicLetter
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"AN": AN, // ArabicNumber
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"B": B, // ParagraphSeparator
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"BN": BN, // BoundaryNeutral
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"CS": CS, // CommonSeparator
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"EN": EN, // EuropeanNumber
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"ES": ES, // EuropeanSeparator
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"ET": ET, // EuropeanTerminator
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"L": L, // LeftToRight
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"NSM": NSM, // NonspacingMark
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"ON": ON, // OtherNeutral
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"R": R, // RightToLeft
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"S": S, // SegmentSeparator
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"WS": WS, // WhiteSpace
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"FSI": Control,
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"PDF": Control,
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"PDI": Control,
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"LRE": Control,
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"LRI": Control,
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"LRO": Control,
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"RLE": Control,
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"RLI": Control,
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"RLO": Control,
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}
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func genTables() {
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if numClass > 0x0F {
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log.Fatalf("Too many Class constants (%#x > 0x0F).", numClass)
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}
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w := gen.NewCodeWriter()
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defer w.WriteVersionedGoFile(*outputFile, "bidi")
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gen.WriteUnicodeVersion(w)
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t := triegen.NewTrie("bidi")
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// Build data about bracket mapping. These bits need to be or-ed with
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// any other bits.
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orMask := map[rune]uint64{}
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xorMap := map[rune]int{}
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xorMasks := []rune{0} // First value is no-op.
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ucd.Parse(gen.OpenUCDFile("BidiBrackets.txt"), func(p *ucd.Parser) {
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r1 := p.Rune(0)
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r2 := p.Rune(1)
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xor := r1 ^ r2
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if _, ok := xorMap[xor]; !ok {
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xorMap[xor] = len(xorMasks)
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xorMasks = append(xorMasks, xor)
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}
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entry := uint64(xorMap[xor]) << xorMaskShift
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switch p.String(2) {
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case "o":
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entry |= openMask
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case "c", "n":
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default:
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log.Fatalf("Unknown bracket class %q.", p.String(2))
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}
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orMask[r1] = entry
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})
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w.WriteComment(`
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xorMasks contains masks to be xor-ed with brackets to get the reverse
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version.`)
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w.WriteVar("xorMasks", xorMasks)
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done := map[rune]bool{}
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insert := func(r rune, c Class) {
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if !done[r] {
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t.Insert(r, orMask[r]|uint64(c))
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done[r] = true
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}
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}
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// Insert the derived BiDi properties.
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ucd.Parse(gen.OpenUCDFile("extracted/DerivedBidiClass.txt"), func(p *ucd.Parser) {
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r := p.Rune(0)
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class, ok := bidiClass[p.String(1)]
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if !ok {
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log.Fatalf("%U: Unknown BiDi class %q", r, p.String(1))
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}
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insert(r, class)
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})
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visitDefaults(insert)
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// TODO: use sparse blocks. This would reduce table size considerably
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// from the looks of it.
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sz, err := t.Gen(w)
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if err != nil {
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log.Fatal(err)
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}
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w.Size += sz
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}
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// dummy values to make methods in gen_common compile. The real versions
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// will be generated by this file to tables.go.
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var (
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xorMasks []rune
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)
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