97 lines
2.6 KiB
Go
97 lines
2.6 KiB
Go
|
// Copyright 2015 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.
|
||
|
|
|
||
|
|
// +build ignore
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
// This code is shared between the main code generator and the test code.
|
||
|
|
|
||
|
|
import (
|
||
|
|
"flag"
|
||
|
|
"log"
|
||
|
|
"strconv"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"golang.org/x/text/internal/gen"
|
||
|
|
"golang.org/x/text/internal/ucd"
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
outputFile = flag.String("out", "tables.go", "output file")
|
||
|
|
)
|
||
|
|
|
||
|
|
var typeMap = map[string]elem{
|
||
|
|
"A": tagAmbiguous,
|
||
|
|
"N": tagNeutral,
|
||
|
|
"Na": tagNarrow,
|
||
|
|
"W": tagWide,
|
||
|
|
"F": tagFullwidth,
|
||
|
|
"H": tagHalfwidth,
|
||
|
|
}
|
||
|
|
|
||
|
|
// getWidthData calls f for every entry for which it is defined.
|
||
|
|
//
|
||
|
|
// f may be called multiple times for the same rune. The last call to f is the
|
||
|
|
// correct value. f is not called for all runes. The default tag type is
|
||
|
|
// Neutral.
|
||
|
|
func getWidthData(f func(r rune, tag elem, alt rune)) {
|
||
|
|
// Set the default values for Unified Ideographs. In line with Annex 11,
|
||
|
|
// we encode full ranges instead of the defined runes in Unified_Ideograph.
|
||
|
|
for _, b := range []struct{ lo, hi rune }{
|
||
|
|
{0x4E00, 0x9FFF}, // the CJK Unified Ideographs block,
|
||
|
|
{0x3400, 0x4DBF}, // the CJK Unified Ideographs Externsion A block,
|
||
|
|
{0xF900, 0xFAFF}, // the CJK Compatibility Ideographs block,
|
||
|
|
{0x20000, 0x2FFFF}, // the Supplementary Ideographic Plane,
|
||
|
|
{0x30000, 0x3FFFF}, // the Tertiary Ideographic Plane,
|
||
|
|
} {
|
||
|
|
for r := b.lo; r <= b.hi; r++ {
|
||
|
|
f(r, tagWide, 0)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
inverse := map[rune]rune{}
|
||
|
|
maps := map[string]bool{
|
||
|
|
"<wide>": true,
|
||
|
|
"<narrow>": true,
|
||
|
|
}
|
||
|
|
|
||
|
|
// We cannot reuse package norm's decomposition, as we need an unexpanded
|
||
|
|
// decomposition. We make use of the opportunity to verify that the
|
||
|
|
// decomposition type is as expected.
|
||
|
|
ucd.Parse(gen.OpenUCDFile("UnicodeData.txt"), func(p *ucd.Parser) {
|
||
|
|
r := p.Rune(0)
|
||
|
|
s := strings.SplitN(p.String(ucd.DecompMapping), " ", 2)
|
||
|
|
if !maps[s[0]] {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
x, err := strconv.ParseUint(s[1], 16, 32)
|
||
|
|
if err != nil {
|
||
|
|
log.Fatalf("Error parsing rune %q", s[1])
|
||
|
|
}
|
||
|
|
if inverse[r] != 0 || inverse[rune(x)] != 0 {
|
||
|
|
log.Fatalf("Circular dependency in mapping between %U and %U", r, x)
|
||
|
|
}
|
||
|
|
inverse[r] = rune(x)
|
||
|
|
inverse[rune(x)] = r
|
||
|
|
})
|
||
|
|
|
||
|
|
// <rune range>;<type>
|
||
|
|
ucd.Parse(gen.OpenUCDFile("EastAsianWidth.txt"), func(p *ucd.Parser) {
|
||
|
|
tag, ok := typeMap[p.String(1)]
|
||
|
|
if !ok {
|
||
|
|
log.Fatalf("Unknown width type %q", p.String(1))
|
||
|
|
}
|
||
|
|
r := p.Rune(0)
|
||
|
|
alt, ok := inverse[r]
|
||
|
|
if tag == tagFullwidth || tag == tagHalfwidth && r != wonSign {
|
||
|
|
tag |= tagNeedsFold
|
||
|
|
if !ok {
|
||
|
|
log.Fatalf("Narrow or wide rune %U has no decomposition", r)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
f(r, tag, alt)
|
||
|
|
})
|
||
|
|
}
|