category.cs

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					IsCategory (UnicodeCategory.ParagraphSeparator, c);
					
			case Category.UnicodeP:	// punctuation
				return
					IsCategory (UnicodeCategory.DashPunctuation, c) ||
					IsCategory (UnicodeCategory.OpenPunctuation, c) ||
					IsCategory (UnicodeCategory.InitialQuotePunctuation, c) ||
					IsCategory (UnicodeCategory.ClosePunctuation, c) ||
					IsCategory (UnicodeCategory.FinalQuotePunctuation, c) ||
					IsCategory (UnicodeCategory.ConnectorPunctuation, c) ||
					IsCategory (UnicodeCategory.OtherPunctuation, c);
			
			case Category.UnicodeS:	// symbol
				return
					IsCategory (UnicodeCategory.MathSymbol, c) ||
					IsCategory (UnicodeCategory.CurrencySymbol, c) ||
					IsCategory (UnicodeCategory.ModifierSymbol, c) ||
					IsCategory (UnicodeCategory.OtherSymbol, c);
			
			case Category.UnicodeC:	// other
				return
					IsCategory (UnicodeCategory.Control, c) ||
					IsCategory (UnicodeCategory.Format, c) ||
					IsCategory (UnicodeCategory.PrivateUse, c) ||
					IsCategory (UnicodeCategory.Surrogate, c) ||
					IsCategory (UnicodeCategory.OtherNotAssigned, c);

			// Unicode block ranges...

			case Category.UnicodeBasicLatin:
				return '\u0000' <= c && c <= '\u007F';

			case Category.UnicodeLatin1Supplement:
				return '\u0080' <= c && c <= '\u00FF';

			case Category.UnicodeLatinExtendedA:
				return '\u0100' <= c && c <= '\u017F';

			case Category.UnicodeLatinExtendedB:
				return '\u0180' <= c && c <= '\u024F';

			case Category.UnicodeIPAExtensions:
				return '\u0250' <= c && c <= '\u02AF';

			case Category.UnicodeSpacingModifierLetters:
				return '\u02B0' <= c && c <= '\u02FF';

			case Category.UnicodeCombiningDiacriticalMarks:
				return '\u0300' <= c && c <= '\u036F';

			case Category.UnicodeGreek:
				return '\u0370' <= c && c <= '\u03FF';

			case Category.UnicodeCyrillic:
				return '\u0400' <= c && c <= '\u04FF';

			case Category.UnicodeArmenian:
				return '\u0530' <= c && c <= '\u058F';

			case Category.UnicodeHebrew:
				return '\u0590' <= c && c <= '\u05FF';

			case Category.UnicodeArabic:
				return '\u0600' <= c && c <= '\u06FF';

			case Category.UnicodeSyriac:
				return '\u0700' <= c && c <= '\u074F';

			case Category.UnicodeThaana:
				return '\u0780' <= c && c <= '\u07BF';

			case Category.UnicodeDevanagari:
				return '\u0900' <= c && c <= '\u097F';

			case Category.UnicodeBengali:
				return '\u0980' <= c && c <= '\u09FF';

			case Category.UnicodeGurmukhi:
				return '\u0A00' <= c && c <= '\u0A7F';

			case Category.UnicodeGujarati:
				return '\u0A80' <= c && c <= '\u0AFF';

			case Category.UnicodeOriya:
				return '\u0B00' <= c && c <= '\u0B7F';

			case Category.UnicodeTamil:
				return '\u0B80' <= c && c <= '\u0BFF';

			case Category.UnicodeTelugu:
				return '\u0C00' <= c && c <= '\u0C7F';

			case Category.UnicodeKannada:
				return '\u0C80' <= c && c <= '\u0CFF';

			case Category.UnicodeMalayalam:
				return '\u0D00' <= c && c <= '\u0D7F';

			case Category.UnicodeSinhala:
				return '\u0D80' <= c && c <= '\u0DFF';

			case Category.UnicodeThai:
				return '\u0E00' <= c && c <= '\u0E7F';

			case Category.UnicodeLao:
				return '\u0E80' <= c && c <= '\u0EFF';

			case Category.UnicodeTibetan:
				return '\u0F00' <= c && c <= '\u0FFF';

			case Category.UnicodeMyanmar:
				return '\u1000' <= c && c <= '\u109F';

			case Category.UnicodeGeorgian:
				return '\u10A0' <= c && c <= '\u10FF';

			case Category.UnicodeHangulJamo:
				return '\u1100' <= c && c <= '\u11FF';

			case Category.UnicodeEthiopic:
				return '\u1200' <= c && c <= '\u137F';

			case Category.UnicodeCherokee:
				return '\u13A0' <= c && c <= '\u13FF';

			case Category.UnicodeUnifiedCanadianAboriginalSyllabics:
				return '\u1400' <= c && c <= '\u167F';

			case Category.UnicodeOgham:
				return '\u1680' <= c && c <= '\u169F';

			case Category.UnicodeRunic:
				return '\u16A0' <= c && c <= '\u16FF';

			case Category.UnicodeKhmer:
				return '\u1780' <= c && c <= '\u17FF';

			case Category.UnicodeMongolian:
				return '\u1800' <= c && c <= '\u18AF';

			case Category.UnicodeLatinExtendedAdditional:
				return '\u1E00' <= c && c <= '\u1EFF';

			case Category.UnicodeGreekExtended:
				return '\u1F00' <= c && c <= '\u1FFF';

			case Category.UnicodeGeneralPunctuation:
				return '\u2000' <= c && c <= '\u206F';

			case Category.UnicodeSuperscriptsandSubscripts:
				return '\u2070' <= c && c <= '\u209F';

			case Category.UnicodeCurrencySymbols:
				return '\u20A0' <= c && c <= '\u20CF';

			case Category.UnicodeCombiningMarksforSymbols:
				return '\u20D0' <= c && c <= '\u20FF';

			case Category.UnicodeLetterlikeSymbols:
				return '\u2100' <= c && c <= '\u214F';

			case Category.UnicodeNumberForms:
				return '\u2150' <= c && c <= '\u218F';

			case Category.UnicodeArrows:
				return '\u2190' <= c && c <= '\u21FF';

			case Category.UnicodeMathematicalOperators:
				return '\u2200' <= c && c <= '\u22FF';

			case Category.UnicodeMiscellaneousTechnical:
				return '\u2300' <= c && c <= '\u23FF';

			case Category.UnicodeControlPictures:
				return '\u2400' <= c && c <= '\u243F';

			case Category.UnicodeOpticalCharacterRecognition:
				return '\u2440' <= c && c <= '\u245F';

			case Category.UnicodeEnclosedAlphanumerics:
				return '\u2460' <= c && c <= '\u24FF';

			case Category.UnicodeBoxDrawing:
				return '\u2500' <= c && c <= '\u257F';

			case Category.UnicodeBlockElements:
				return '\u2580' <= c && c <= '\u259F';

			case Category.UnicodeGeometricShapes:
				return '\u25A0' <= c && c <= '\u25FF';

			case Category.UnicodeMiscellaneousSymbols:
				return '\u2600' <= c && c <= '\u26FF';

			case Category.UnicodeDingbats:
				return '\u2700' <= c && c <= '\u27BF';

			case Category.UnicodeBraillePatterns:
				return '\u2800' <= c && c <= '\u28FF';

			case Category.UnicodeCJKRadicalsSupplement:
				return '\u2E80' <= c && c <= '\u2EFF';

			case Category.UnicodeKangxiRadicals:
				return '\u2F00' <= c && c <= '\u2FDF';

			case Category.UnicodeIdeographicDescriptionCharacters:
				return '\u2FF0' <= c && c <= '\u2FFF';

			case Category.UnicodeCJKSymbolsandPunctuation:
				return '\u3000' <= c && c <= '\u303F';

			case Category.UnicodeHiragana:
				return '\u3040' <= c && c <= '\u309F';

			case Category.UnicodeKatakana:
				return '\u30A0' <= c && c <= '\u30FF';

			case Category.UnicodeBopomofo:
				return '\u3100' <= c && c <= '\u312F';

			case Category.UnicodeHangulCompatibilityJamo:
				return '\u3130' <= c && c <= '\u318F';

			case Category.UnicodeKanbun:
				return '\u3190' <= c && c <= '\u319F';

			case Category.UnicodeBopomofoExtended:
				return '\u31A0' <= c && c <= '\u31BF';

			case Category.UnicodeEnclosedCJKLettersandMonths:
				return '\u3200' <= c && c <= '\u32FF';

			case Category.UnicodeCJKCompatibility:
				return '\u3300' <= c && c <= '\u33FF';

			case Category.UnicodeCJKUnifiedIdeographsExtensionA:
				return '\u3400' <= c && c <= '\u4DB5';

			case Category.UnicodeCJKUnifiedIdeographs:
				return '\u4E00' <= c && c <= '\u9FFF';

			case Category.UnicodeYiSyllables:
				return '\uA000' <= c && c <= '\uA48F';

			case Category.UnicodeYiRadicals:
				return '\uA490' <= c && c <= '\uA4CF';

			case Category.UnicodeHangulSyllables:
				return '\uAC00' <= c && c <= '\uD7A3';

			case Category.UnicodeHighSurrogates:
				return '\uD800' <= c && c <= '\uDB7F';

			case Category.UnicodeHighPrivateUseSurrogates:
				return '\uDB80' <= c && c <= '\uDBFF';

			case Category.UnicodeLowSurrogates:
				return '\uDC00' <= c && c <= '\uDFFF';

			case Category.UnicodePrivateUse:
				return '\uE000' <= c && c <= '\uF8FF';

			case Category.UnicodeCJKCompatibilityIdeographs:
				return '\uF900' <= c && c <= '\uFAFF';

			case Category.UnicodeAlphabeticPresentationForms:
				return '\uFB00' <= c && c <= '\uFB4F';

			case Category.UnicodeArabicPresentationFormsA:
				return '\uFB50' <= c && c <= '\uFDFF';

			case Category.UnicodeCombiningHalfMarks:
				return '\uFE20' <= c && c <= '\uFE2F';

			case Category.UnicodeCJKCompatibilityForms:
				return '\uFE30' <= c && c <= '\uFE4F';

			case Category.UnicodeSmallFormVariants:
				return '\uFE50' <= c && c <= '\uFE6F';

			case Category.UnicodeArabicPresentationFormsB:
				return '\uFE70' <= c && c <= '\uFEFE';

			case Category.UnicodeHalfwidthandFullwidthForms:
				return '\uFF00' <= c && c <= '\uFFEF';

			case Category.UnicodeSpecials:
				return
					'\uFEFF' <= c && c <= '\uFEFF' ||
					'\uFFF0' <= c && c <= '\uFFFD';

			// these block ranges begin above 0x10000

			case Category.UnicodeOldItalic:
			case Category.UnicodeGothic:
			case Category.UnicodeDeseret:
			case Category.UnicodeByzantineMusicalSymbols:
			case Category.UnicodeMusicalSymbols:
			case Category.UnicodeMathematicalAlphanumericSymbols:
			case Category.UnicodeCJKUnifiedIdeographsExtensionB:
			case Category.UnicodeCJKCompatibilityIdeographsSupplement:
			case Category.UnicodeTags:
				return false;

			default:
				return false;
			}
		}

		private static bool IsCategory (UnicodeCategory uc, char c) {
			if (Char.GetUnicodeCategory (c) == uc)
				return true;

			return false;
		}
	}
}