GoldenCrystal
281 lines
9.5 KiB
C#
281 lines
9.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.IO.Compression;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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namespace System.Unicode
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{
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public sealed class UnicodeInfo
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{
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private static readonly UnicodeInfo @default = ReadEmbeddedUnicodeData();
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public static UnicodeInfo Default { get { return @default; } }
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private static UnicodeInfo ReadEmbeddedUnicodeData()
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{
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using (var stream = new DeflateStream(typeof(UnicodeInfo).GetTypeInfo().Assembly.GetManifestResourceStream("ucd.dat"), CompressionMode.Decompress, false))
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{
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return FromStream(stream);
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}
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}
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public static UnicodeInfo FromStream(Stream stream)
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{
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using (var reader = new BinaryReader(stream, Encoding.UTF8))
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{
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if (reader.ReadByte() != 'U'
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| reader.ReadByte() != 'C'
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| reader.ReadByte() != 'D')
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throw new InvalidDataException();
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byte formatVersion = reader.ReadByte();
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#if !DEBUG
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if (formatVersion != 1) throw new InvalidDataException();
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#endif
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var unicodeVersion = new Version(reader.ReadUInt16(), reader.ReadByte());
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var unicodeCharacterDataEntries = new UnicodeCharacterData[ReadCodePoint(reader)];
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for (int i = 0; i < unicodeCharacterDataEntries.Length; ++i)
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{
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unicodeCharacterDataEntries[i] = ReadUnicodeCharacterDataEntry(reader);
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}
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var blockEntries = new UnicodeBlock[reader.ReadByte()];
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for (int i = 0; i < blockEntries.Length; ++i)
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{
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blockEntries[i] = ReadBlockEntry(reader);
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}
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var unihanCharacterDataEntries = new UnihanCharacterData[ReadCodePoint(reader)];
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for (int i = 0; i < unihanCharacterDataEntries.Length; ++i)
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{
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unihanCharacterDataEntries[i] = ReadUnihanCharacterDataEntry(reader);
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}
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return new UnicodeInfo(unicodeVersion, unicodeCharacterDataEntries, unihanCharacterDataEntries, blockEntries);
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}
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}
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private static UnicodeCharacterData ReadUnicodeCharacterDataEntry(BinaryReader reader)
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{
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var fields = (UcdFields)reader.ReadUInt16();
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var codePointRange = (fields & UcdFields.CodePointRange) != 0 ? new UnicodeCharacterRange(ReadCodePoint(reader), ReadCodePoint(reader)) : new UnicodeCharacterRange(ReadCodePoint(reader));
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string name = (fields & UcdFields.Name) != 0 ? reader.ReadString() : null;
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var category = (fields & UcdFields.Category) != 0 ? (UnicodeCategory)reader.ReadByte() : UnicodeCategory.OtherNotAssigned;
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var canonicalCombiningClass = (fields & UcdFields.CanonicalCombiningClass) != 0 ? (CanonicalCombiningClass)reader.ReadByte() : CanonicalCombiningClass.NotReordered;
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var bidirectionalClass = (fields & UcdFields.BidirectionalClass) != 0 ? (BidirectionalClass)reader.ReadByte() : 0;
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CompatibilityFormattingTag decompositionType = (fields & UcdFields.DecompositionMapping) != 0 ? (CompatibilityFormattingTag)reader.ReadByte() : CompatibilityFormattingTag.Canonical;
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string decompositionMapping = (fields & UcdFields.DecompositionMapping) != 0 ? reader.ReadString() : null;
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var numericType = (UnicodeNumericType)((int)(fields & UcdFields.NumericNumeric) >> 6);
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UnicodeRationalNumber numericValue = numericType != UnicodeNumericType.None ?
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new UnicodeRationalNumber(reader.ReadInt64(), reader.ReadByte()) :
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default(UnicodeRationalNumber);
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string oldName = (fields & UcdFields.OldName) != 0 ? reader.ReadString() : null;
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string simpleUpperCaseMapping = (fields & UcdFields.SimpleUpperCaseMapping) != 0 ? reader.ReadString() : null;
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string simpleLowerCaseMapping = (fields & UcdFields.SimpleLowerCaseMapping) != 0 ? reader.ReadString() : null;
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string simpleTitleCaseMapping = (fields & UcdFields.SimpleTitleCaseMapping) != 0 ? reader.ReadString() : null;
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ContributoryProperties contributoryProperties = (fields & UcdFields.ContributoryProperties) != 0 ? (ContributoryProperties)reader.ReadInt32() : 0;
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CoreProperties coreProperties = (fields & UcdFields.CoreProperties) != 0 ? (CoreProperties)ReadInt24(reader) : 0;
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return new UnicodeCharacterData
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(
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codePointRange,
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name,
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category,
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canonicalCombiningClass,
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bidirectionalClass,
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decompositionType,
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decompositionMapping,
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numericType,
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numericValue,
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(fields & UcdFields.BidirectionalMirrored) != 0,
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oldName,
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simpleUpperCaseMapping,
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simpleLowerCaseMapping,
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simpleTitleCaseMapping,
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contributoryProperties,
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coreProperties,
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null
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);
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}
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private static UnihanCharacterData ReadUnihanCharacterDataEntry(BinaryReader reader)
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{
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var fields = (UnihanFields)reader.ReadUInt16();
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int codePoint = UnihanCharacterData.UnpackCodePoint(ReadCodePoint(reader));
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var numericType = (UnihanNumericType)((int)(fields & UnihanFields.OtherNumeric));
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long numericValue = numericType != UnihanNumericType.None ?
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reader.ReadInt64() :
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0;
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string definition = (fields & UnihanFields.Definition) != 0 ? reader.ReadString() : null;
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string mandarinReading = (fields & UnihanFields.MandarinReading) != 0 ? reader.ReadString() : null;
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string cantoneseReading = (fields & UnihanFields.CantoneseReading) != 0 ? reader.ReadString() : null;
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string japaneseKunReading = (fields & UnihanFields.JapaneseKunReading) != 0 ? reader.ReadString() : null;
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string japaneseOnReading = (fields & UnihanFields.JapaneseOnReading) != 0 ? reader.ReadString() : null;
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string koreanReading = (fields & UnihanFields.KoreanReading) != 0 ? reader.ReadString() : null;
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string hangulReading = (fields & UnihanFields.HangulReading) != 0 ? reader.ReadString() : null;
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string vietnameseReading = (fields & UnihanFields.VietnameseReading) != 0 ? reader.ReadString() : null;
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string simplifiedVariant = (fields & UnihanFields.SimplifiedVariant) != 0 ? reader.ReadString() : null;
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string traditionalVariant = (fields & UnihanFields.TraditionalVariant) != 0 ? reader.ReadString() : null;
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return new UnihanCharacterData
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(
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codePoint,
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numericType,
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numericValue,
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definition,
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mandarinReading,
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cantoneseReading,
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japaneseKunReading,
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japaneseOnReading,
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koreanReading,
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hangulReading,
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vietnameseReading,
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simplifiedVariant,
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traditionalVariant
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);
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}
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private static UnicodeBlock ReadBlockEntry(BinaryReader reader)
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{
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return new UnicodeBlock(new UnicodeCharacterRange(ReadCodePoint(reader), ReadCodePoint(reader)), reader.ReadString());
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}
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private static int ReadInt24(BinaryReader reader)
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{
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return reader.ReadByte() | ((reader.ReadByte() | (reader.ReadByte() << 8)) << 8);
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}
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#if DEBUG
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internal static int ReadCodePoint(BinaryReader reader)
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#else
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private static int ReadCodePoint(BinaryReader reader)
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#endif
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{
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byte b = reader.ReadByte();
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if (b < 0xA0) return b;
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else if (b < 0xC0)
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{
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return 0xA0 + (((b & 0x1F) << 8) | reader.ReadByte());
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}
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else if (b < 0xE0)
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{
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return 0x20A0 + (((b & 0x1F) << 8) | reader.ReadByte());
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}
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else
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{
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return 0x40A0 + (((((b & 0x1F) << 8) | reader.ReadByte()) << 8) | reader.ReadByte());
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}
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}
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private readonly Version unicodeVersion;
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private readonly UnicodeCharacterData[] unicodeCharacterData;
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private readonly UnihanCharacterData[] unihanCharacterData;
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private readonly UnicodeBlock[] blockEntries;
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internal UnicodeInfo(Version unicodeVersion, UnicodeCharacterData[] unicodeCharacterData, UnihanCharacterData[] unihanCharacterData, UnicodeBlock[] blockEntries)
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{
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this.unicodeVersion = unicodeVersion;
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this.unicodeCharacterData = unicodeCharacterData;
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this.unihanCharacterData = unihanCharacterData;
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this.blockEntries = blockEntries;
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}
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public Version UnicodeVersion { get { return unicodeVersion; } }
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private UnicodeCharacterData FindUnicodeCodePoint(int codePoint)
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{
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int minIndex = 0;
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int maxIndex = unicodeCharacterData.Length - 1;
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do
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{
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int index = (minIndex + maxIndex) >> 1;
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int Δ = unicodeCharacterData[index].CodePointRange.CompareCodePoint(codePoint);
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if (Δ == 0) return unicodeCharacterData[index];
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else if (Δ < 0) maxIndex = index - 1;
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else minIndex = index + 1;
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} while (minIndex <= maxIndex);
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return null;
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}
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private UnihanCharacterData FindUnihanCodePoint(int codePoint)
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{
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int minIndex;
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int maxIndex;
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if (unihanCharacterData.Length == 0 || codePoint < unihanCharacterData[minIndex = 0].CodePoint || codePoint > unihanCharacterData[maxIndex = unicodeCharacterData.Length - 1].CodePoint)
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{
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return null;
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}
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do
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{
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int index = (minIndex + maxIndex) >> 1;
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int Δ = codePoint - unihanCharacterData[index].CodePoint;
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if (Δ == 0) return unihanCharacterData[index];
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else if (Δ < 0) maxIndex = index - 1;
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else minIndex = index + 1;
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} while (minIndex <= maxIndex);
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return null;
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}
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private int FindBlockIndex(int codePoint)
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{
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int minIndex = 0;
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int maxIndex = blockEntries.Length - 1;
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do
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{
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int index = (minIndex + maxIndex) >> 1;
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int Δ = blockEntries[index].CodePointRange.CompareCodePoint(codePoint);
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if (Δ == 0) return index;
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else if (Δ < 0) maxIndex = index - 1;
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else minIndex = index + 1;
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} while (minIndex <= maxIndex);
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return -1;
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}
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private string GetBlockName(int codePoint)
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{
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int i = FindBlockIndex(codePoint);
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return i >= 0 ? blockEntries[i].Name : null;
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}
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public UnicodeCharInfo GetCharInfo(int codePoint)
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{
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return new UnicodeCharInfo(codePoint, FindUnicodeCodePoint(codePoint), FindUnihanCodePoint(codePoint), GetBlockName(codePoint));
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}
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public UnicodeBlock[] GetBlocks()
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{
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return (UnicodeBlock[])blockEntries.Clone();
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}
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}
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}
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