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276 lines
5.2 KiB
C++
276 lines
5.2 KiB
C++
//
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// Unicode.h
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//
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// $Id: //poco/1.4/Foundation/include/Poco/Unicode.h#2 $
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//
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// Library: Foundation
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// Package: Text
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// Module: Unicode
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//
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// Definition of the Unicode class.
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//
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// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_Unicode_INCLUDED
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#define Foundation_Unicode_INCLUDED
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#include "Poco/Foundation.h"
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namespace Poco {
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class Foundation_API Unicode
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/// This class contains enumerations and static
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/// utility functions for dealing with Unicode characters
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/// and their properties.
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///
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/// For more information on Unicode, see <http://www.unicode.org>.
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///
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/// The implementation is based on the Unicode support
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/// functions in PCRE.
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{
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public:
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// Implementation note: the following definitions must be kept
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// in sync with those from ucp.h (PCRE).
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enum CharacterCategory
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/// Unicode 5.0 character categories.
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{
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UCP_OTHER,
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UCP_LETTER,
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UCP_MARK,
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UCP_NUMBER,
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UCP_PUNCTUATION,
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UCP_SYMBOL,
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UCP_SEPARATOR
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};
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enum CharacterType
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/// Unicode 5.0 character types.
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{
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UCP_CONTROL,
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UCP_FORMAT,
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UCP_UNASSIGNED,
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UCP_PRIVATE_USE,
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UCP_SURROGATE,
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UCP_LOWER_CASE_LETTER,
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UCP_MODIFIER_LETTER,
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UCP_OTHER_LETTER,
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UCP_TITLE_CASE_LETTER,
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UCP_UPPER_CASE_LETTER,
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UCP_SPACING_MARK,
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UCP_ENCLOSING_MARK,
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UCP_NON_SPACING_MARK,
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UCP_DECIMAL_NUMBER,
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UCP_LETTER_NUMBER,
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UCP_OTHER_NUMBER,
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UCP_CONNECTOR_PUNCTUATION,
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UCP_DASH_PUNCTUATION,
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UCP_CLOSE_PUNCTUATION,
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UCP_FINAL_PUNCTUATION,
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UCP_INITIAL_PUNCTUATION,
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UCP_OTHER_PUNCTUATION,
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UCP_OPEN_PUNCTUATION,
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UCP_CURRENCY_SYMBOL,
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UCP_MODIFIER_SYMBOL,
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UCP_MATHEMATICAL_SYMBOL,
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UCP_OTHER_SYMBOL,
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UCP_LINE_SEPARATOR,
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UCP_PARAGRAPH_SEPARATOR,
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UCP_SPACE_SEPARATOR
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};
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enum Script
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/// Unicode 5.0 scripts.
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{
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UCP_ARABIC,
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UCP_ARMENIAN,
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UCP_BENGALI,
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UCP_BOPOMOFO,
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UCP_BRAILLE,
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UCP_BUGINESE,
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UCP_BUHID,
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UCP_CANADIAN_ABORIGINAL,
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UCP_CHEROKEE,
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UCP_COMMON,
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UCP_COPTIC,
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UCP_CYPRIOT,
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UCP_CYRILLIC,
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UCP_DESERET,
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UCP_DEVANAGARI,
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UCP_ETHIOPIC,
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UCP_GEORGIAN,
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UCP_GLAGOLITIC,
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UCP_GOTHIC,
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UCP_GREEK,
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UCP_GUJARATI,
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UCP_GURMUKHI,
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UCP_HAN,
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UCP_HANGUL,
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UCP_HANUNOO,
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UCP_HEBREW,
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UCP_HIRAGANA,
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UCP_INHERITED,
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UCP_KANNADA,
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UCP_KATAKANA,
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UCP_KHAROSHTHI,
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UCP_KHMER,
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UCP_LAO,
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UCP_LATIN,
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UCP_LIMBU,
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UCP_LINEAR_B,
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UCP_MALAYALAM,
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UCP_MONGOLIAN,
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UCP_MYANMAR,
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UCP_NEW_TAI_LUE,
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UCP_OGHAM,
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UCP_OLD_ITALIC,
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UCP_OLD_PERSIAN,
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UCP_ORIYA,
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UCP_OSMANYA,
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UCP_RUNIC,
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UCP_SHAVIAN,
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UCP_SINHALA,
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UCP_SYLOTI_NAGRI,
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UCP_SYRIAC,
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UCP_TAGALOG,
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UCP_TAGBANWA,
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UCP_TAI_LE,
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UCP_TAMIL,
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UCP_TELUGU,
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UCP_THAANA,
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UCP_THAI,
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UCP_TIBETAN,
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UCP_TIFINAGH,
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UCP_UGARITIC,
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UCP_YI,
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UCP_BALINESE,
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UCP_CUNEIFORM,
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UCP_NKO,
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UCP_PHAGS_PA,
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UCP_PHOENICIAN,
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UCP_CARIAN,
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UCP_CHAM,
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UCP_KAYAH_LI,
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UCP_LEPCHA,
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UCP_LYCIAN,
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UCP_LYDIAN,
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UCP_OL_CHIKI,
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UCP_REJANG,
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UCP_SAURASHTRA,
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UCP_SUNDANESE,
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UCP_VAI
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};
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enum
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{
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UCP_MAX_CODEPOINT = 0x10FFFF
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};
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struct CharacterProperties
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/// This structure holds the character properties
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/// of an Unicode character.
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{
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CharacterCategory category;
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CharacterType type;
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Script script;
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};
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static void properties(int ch, CharacterProperties& props);
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/// Return the Unicode character properties for the
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/// character with the given Unicode value.
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static bool isSpace(int ch);
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/// Returns true iff the given character is a separator.
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static bool isDigit(int ch);
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/// Returns true iff the given character is a numeric character.
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static bool isPunct(int ch);
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/// Returns true iff the given character is a punctuation character.
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static bool isAlpha(int ch);
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/// Returns true iff the given character is a letter.
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static bool isLower(int ch);
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/// Returns true iff the given character is a lowercase
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/// character.
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static bool isUpper(int ch);
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/// Returns true iff the given character is an uppercase
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/// character.
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static int toLower(int ch);
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/// If the given character is an uppercase character,
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/// return its lowercase counterpart, otherwise return
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/// the character.
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static int toUpper(int ch);
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/// If the given character is a lowercase character,
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/// return its uppercase counterpart, otherwise return
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/// the character.
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};
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//
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// inlines
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//
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inline bool Unicode::isSpace(int ch)
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{
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CharacterProperties props;
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properties(ch, props);
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return props.category == UCP_SEPARATOR;
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}
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inline bool Unicode::isDigit(int ch)
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{
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CharacterProperties props;
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properties(ch, props);
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return props.category == UCP_NUMBER;
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}
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inline bool Unicode::isPunct(int ch)
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{
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CharacterProperties props;
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properties(ch, props);
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return props.category == UCP_PUNCTUATION;
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}
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inline bool Unicode::isAlpha(int ch)
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{
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CharacterProperties props;
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properties(ch, props);
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return props.category == UCP_LETTER;
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}
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inline bool Unicode::isLower(int ch)
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{
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CharacterProperties props;
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properties(ch, props);
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return props.category == UCP_LETTER && props.type == UCP_LOWER_CASE_LETTER;
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}
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inline bool Unicode::isUpper(int ch)
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{
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CharacterProperties props;
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properties(ch, props);
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return props.category == UCP_LETTER && props.type == UCP_UPPER_CASE_LETTER;
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}
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} // namespace Poco
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#endif // Foundation_Unicode_INCLUDED
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