557 lines
12 KiB
Go
557 lines
12 KiB
Go
// Copyright 2013 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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"bufio"
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"fmt"
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"log"
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"net/http"
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"sort"
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"strings"
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"unicode/utf8"
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"golang.org/x/text/encoding"
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"golang.org/x/text/internal/gen"
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)
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const ascii = "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f" +
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"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" +
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` !"#$%&'()*+,-./0123456789:;<=>?` +
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`@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_` +
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"`abcdefghijklmnopqrstuvwxyz{|}~\u007f"
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var encodings = []struct {
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name string
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mib string
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comment string
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varName string
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replacement byte
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mapping string
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}{
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{
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"IBM Code Page 037",
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"IBM037",
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"",
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"CodePage037",
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0x3f,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM037-2.1.2.ucm",
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},
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{
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"IBM Code Page 437",
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"PC8CodePage437",
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"",
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"CodePage437",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM437-2.1.2.ucm",
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},
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{
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"IBM Code Page 850",
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"PC850Multilingual",
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"",
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"CodePage850",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM850-2.1.2.ucm",
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},
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{
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"IBM Code Page 852",
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"PCp852",
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"",
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"CodePage852",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM852-2.1.2.ucm",
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},
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{
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"IBM Code Page 855",
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"IBM855",
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"",
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"CodePage855",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM855-2.1.2.ucm",
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},
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{
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"Windows Code Page 858", // PC latin1 with Euro
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"IBM00858",
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"",
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"CodePage858",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/windows-858-2000.ucm",
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},
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{
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"IBM Code Page 860",
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"IBM860",
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"",
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"CodePage860",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM860-2.1.2.ucm",
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},
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{
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"IBM Code Page 862",
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"PC862LatinHebrew",
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"",
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"CodePage862",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM862-2.1.2.ucm",
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},
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{
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"IBM Code Page 863",
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"IBM863",
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"",
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"CodePage863",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM863-2.1.2.ucm",
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},
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{
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"IBM Code Page 865",
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"IBM865",
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"",
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"CodePage865",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM865-2.1.2.ucm",
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},
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{
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"IBM Code Page 866",
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"IBM866",
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"",
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"CodePage866",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-ibm866.txt",
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},
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{
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"IBM Code Page 1047",
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"IBM1047",
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"",
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"CodePage1047",
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0x3f,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/glibc-IBM1047-2.1.2.ucm",
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},
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{
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"IBM Code Page 1140",
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"IBM01140",
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"",
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"CodePage1140",
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0x3f,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/ibm-1140_P100-1997.ucm",
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},
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{
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"ISO 8859-1",
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"ISOLatin1",
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"",
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"ISO8859_1",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/iso-8859_1-1998.ucm",
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},
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{
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"ISO 8859-2",
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"ISOLatin2",
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"",
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"ISO8859_2",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-2.txt",
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},
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{
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"ISO 8859-3",
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"ISOLatin3",
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"",
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"ISO8859_3",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-3.txt",
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},
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{
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"ISO 8859-4",
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"ISOLatin4",
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"",
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"ISO8859_4",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-4.txt",
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},
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{
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"ISO 8859-5",
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"ISOLatinCyrillic",
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"",
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"ISO8859_5",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-5.txt",
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},
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{
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"ISO 8859-6",
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"ISOLatinArabic",
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"",
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"ISO8859_6,ISO8859_6E,ISO8859_6I",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-6.txt",
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},
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{
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"ISO 8859-7",
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"ISOLatinGreek",
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"",
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"ISO8859_7",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-7.txt",
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},
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{
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"ISO 8859-8",
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"ISOLatinHebrew",
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"",
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"ISO8859_8,ISO8859_8E,ISO8859_8I",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-8.txt",
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},
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{
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"ISO 8859-9",
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"ISOLatin5",
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"",
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"ISO8859_9",
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encoding.ASCIISub,
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"http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/iso-8859_9-1999.ucm",
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},
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{
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"ISO 8859-10",
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"ISOLatin6",
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"",
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"ISO8859_10",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-10.txt",
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},
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{
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"ISO 8859-13",
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"ISO885913",
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"",
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"ISO8859_13",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-13.txt",
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},
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{
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"ISO 8859-14",
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"ISO885914",
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"",
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"ISO8859_14",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-14.txt",
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},
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{
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"ISO 8859-15",
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"ISO885915",
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"",
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"ISO8859_15",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-15.txt",
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},
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{
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"ISO 8859-16",
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"ISO885916",
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"",
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"ISO8859_16",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-iso-8859-16.txt",
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},
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{
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"KOI8-R",
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"KOI8R",
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"",
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"KOI8R",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-koi8-r.txt",
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},
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{
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"KOI8-U",
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"KOI8U",
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"",
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"KOI8U",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-koi8-u.txt",
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},
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{
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"Macintosh",
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"Macintosh",
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"",
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"Macintosh",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-macintosh.txt",
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},
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{
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"Macintosh Cyrillic",
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"MacintoshCyrillic",
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"",
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"MacintoshCyrillic",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-x-mac-cyrillic.txt",
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},
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{
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"Windows 874",
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"Windows874",
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"",
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"Windows874",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-windows-874.txt",
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},
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{
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"Windows 1250",
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"Windows1250",
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"",
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"Windows1250",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-windows-1250.txt",
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},
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{
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"Windows 1251",
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"Windows1251",
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"",
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"Windows1251",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-windows-1251.txt",
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},
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{
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"Windows 1252",
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"Windows1252",
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"",
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"Windows1252",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-windows-1252.txt",
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},
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{
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"Windows 1253",
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"Windows1253",
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"",
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"Windows1253",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-windows-1253.txt",
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},
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{
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"Windows 1254",
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"Windows1254",
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"",
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"Windows1254",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-windows-1254.txt",
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},
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{
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"Windows 1255",
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"Windows1255",
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"",
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"Windows1255",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-windows-1255.txt",
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},
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{
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"Windows 1256",
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"Windows1256",
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"",
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"Windows1256",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-windows-1256.txt",
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},
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{
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"Windows 1257",
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"Windows1257",
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"",
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"Windows1257",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-windows-1257.txt",
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},
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{
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"Windows 1258",
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"Windows1258",
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"",
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"Windows1258",
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encoding.ASCIISub,
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"http://encoding.spec.whatwg.org/index-windows-1258.txt",
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},
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{
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"X-User-Defined",
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"XUserDefined",
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"It is defined at http://encoding.spec.whatwg.org/#x-user-defined",
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"XUserDefined",
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encoding.ASCIISub,
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ascii +
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"\uf780\uf781\uf782\uf783\uf784\uf785\uf786\uf787" +
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"\uf788\uf789\uf78a\uf78b\uf78c\uf78d\uf78e\uf78f" +
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"\uf790\uf791\uf792\uf793\uf794\uf795\uf796\uf797" +
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"\uf798\uf799\uf79a\uf79b\uf79c\uf79d\uf79e\uf79f" +
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"\uf7a0\uf7a1\uf7a2\uf7a3\uf7a4\uf7a5\uf7a6\uf7a7" +
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"\uf7a8\uf7a9\uf7aa\uf7ab\uf7ac\uf7ad\uf7ae\uf7af" +
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"\uf7b0\uf7b1\uf7b2\uf7b3\uf7b4\uf7b5\uf7b6\uf7b7" +
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"\uf7b8\uf7b9\uf7ba\uf7bb\uf7bc\uf7bd\uf7be\uf7bf" +
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"\uf7c0\uf7c1\uf7c2\uf7c3\uf7c4\uf7c5\uf7c6\uf7c7" +
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"\uf7c8\uf7c9\uf7ca\uf7cb\uf7cc\uf7cd\uf7ce\uf7cf" +
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"\uf7d0\uf7d1\uf7d2\uf7d3\uf7d4\uf7d5\uf7d6\uf7d7" +
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"\uf7d8\uf7d9\uf7da\uf7db\uf7dc\uf7dd\uf7de\uf7df" +
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"\uf7e0\uf7e1\uf7e2\uf7e3\uf7e4\uf7e5\uf7e6\uf7e7" +
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"\uf7e8\uf7e9\uf7ea\uf7eb\uf7ec\uf7ed\uf7ee\uf7ef" +
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"\uf7f0\uf7f1\uf7f2\uf7f3\uf7f4\uf7f5\uf7f6\uf7f7" +
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"\uf7f8\uf7f9\uf7fa\uf7fb\uf7fc\uf7fd\uf7fe\uf7ff",
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},
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}
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func getWHATWG(url string) string {
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res, err := http.Get(url)
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if err != nil {
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log.Fatalf("%q: Get: %v", url, err)
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}
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defer res.Body.Close()
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mapping := make([]rune, 128)
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for i := range mapping {
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mapping[i] = '\ufffd'
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}
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scanner := bufio.NewScanner(res.Body)
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for scanner.Scan() {
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s := strings.TrimSpace(scanner.Text())
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if s == "" || s[0] == '#' {
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continue
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}
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x, y := 0, 0
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if _, err := fmt.Sscanf(s, "%d\t0x%x", &x, &y); err != nil {
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log.Fatalf("could not parse %q", s)
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}
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if x < 0 || 128 <= x {
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log.Fatalf("code %d is out of range", x)
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}
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if 0x80 <= y && y < 0xa0 {
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// We diverge from the WHATWG spec by mapping control characters
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// in the range [0x80, 0xa0) to U+FFFD.
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continue
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}
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mapping[x] = rune(y)
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}
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return ascii + string(mapping)
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}
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func getUCM(url string) string {
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res, err := http.Get(url)
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if err != nil {
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log.Fatalf("%q: Get: %v", url, err)
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}
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defer res.Body.Close()
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mapping := make([]rune, 256)
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for i := range mapping {
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mapping[i] = '\ufffd'
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}
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charsFound := 0
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scanner := bufio.NewScanner(res.Body)
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for scanner.Scan() {
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s := strings.TrimSpace(scanner.Text())
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if s == "" || s[0] == '#' {
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continue
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}
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var c byte
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var r rune
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if _, err := fmt.Sscanf(s, `<U%x> \x%x |0`, &r, &c); err != nil {
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continue
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}
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mapping[c] = r
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charsFound++
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}
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if charsFound < 200 {
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log.Fatalf("%q: only %d characters found (wrong page format?)", url, charsFound)
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}
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return string(mapping)
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}
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func main() {
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mibs := map[string]bool{}
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all := []string{}
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w := gen.NewCodeWriter()
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defer w.WriteGoFile("tables.go", "charmap")
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printf := func(s string, a ...interface{}) { fmt.Fprintf(w, s, a...) }
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printf("import (\n")
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printf("\t\"golang.org/x/text/encoding\"\n")
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printf("\t\"golang.org/x/text/encoding/internal/identifier\"\n")
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printf(")\n\n")
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for _, e := range encodings {
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varNames := strings.Split(e.varName, ",")
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all = append(all, varNames...)
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varName := varNames[0]
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switch {
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case strings.HasPrefix(e.mapping, "http://encoding.spec.whatwg.org/"):
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e.mapping = getWHATWG(e.mapping)
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case strings.HasPrefix(e.mapping, "http://source.icu-project.org/repos/icu/data/trunk/charset/data/ucm/"):
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e.mapping = getUCM(e.mapping)
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}
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asciiSuperset, low := strings.HasPrefix(e.mapping, ascii), 0x00
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if asciiSuperset {
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low = 0x80
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}
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lvn := 1
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if strings.HasPrefix(varName, "ISO") || strings.HasPrefix(varName, "KOI") {
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lvn = 3
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}
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lowerVarName := strings.ToLower(varName[:lvn]) + varName[lvn:]
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printf("// %s is the %s encoding.\n", varName, e.name)
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if e.comment != "" {
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printf("//\n// %s\n", e.comment)
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}
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printf("var %s encoding.Encoding = &%s\n\nvar %s = charmap{\nname: %q,\n",
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|
varName, lowerVarName, lowerVarName, e.name)
|
|
if mibs[e.mib] {
|
|
log.Fatalf("MIB type %q declared multiple times.", e.mib)
|
|
}
|
|
printf("mib: identifier.%s,\n", e.mib)
|
|
printf("asciiSuperset: %t,\n", asciiSuperset)
|
|
printf("low: 0x%02x,\n", low)
|
|
printf("replacement: 0x%02x,\n", e.replacement)
|
|
|
|
printf("decode: [256]utf8Enc{\n")
|
|
i, backMapping := 0, map[rune]byte{}
|
|
for _, c := range e.mapping {
|
|
if _, ok := backMapping[c]; !ok && c != utf8.RuneError {
|
|
backMapping[c] = byte(i)
|
|
}
|
|
var buf [8]byte
|
|
n := utf8.EncodeRune(buf[:], c)
|
|
if n > 3 {
|
|
panic(fmt.Sprintf("rune %q (%U) is too long", c, c))
|
|
}
|
|
printf("{%d,[3]byte{0x%02x,0x%02x,0x%02x}},", n, buf[0], buf[1], buf[2])
|
|
if i%2 == 1 {
|
|
printf("\n")
|
|
}
|
|
i++
|
|
}
|
|
printf("},\n")
|
|
|
|
printf("encode: [256]uint32{\n")
|
|
encode := make([]uint32, 0, 256)
|
|
for c, i := range backMapping {
|
|
encode = append(encode, uint32(i)<<24|uint32(c))
|
|
}
|
|
sort.Sort(byRune(encode))
|
|
for len(encode) < cap(encode) {
|
|
encode = append(encode, encode[len(encode)-1])
|
|
}
|
|
for i, enc := range encode {
|
|
printf("0x%08x,", enc)
|
|
if i%8 == 7 {
|
|
printf("\n")
|
|
}
|
|
}
|
|
printf("},\n}\n")
|
|
|
|
// Add an estimate of the size of a single charmap{} struct value, which
|
|
// includes two 256 elem arrays of 4 bytes and some extra fields, which
|
|
// align to 3 uint64s on 64-bit architectures.
|
|
w.Size += 2*4*256 + 3*8
|
|
}
|
|
// TODO: add proper line breaking.
|
|
printf("var listAll = []encoding.Encoding{\n%s,\n}\n\n", strings.Join(all, ",\n"))
|
|
}
|
|
|
|
type byRune []uint32
|
|
|
|
func (b byRune) Len() int { return len(b) }
|
|
func (b byRune) Less(i, j int) bool { return b[i]&0xffffff < b[j]&0xffffff }
|
|
func (b byRune) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
|