650 lines
20 KiB
C
650 lines
20 KiB
C
/*
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********************************************************************************
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* *
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* COPYRIGHT: *
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* (C) Copyright Taligent, Inc., 1997 *
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* (C) Copyright International Business Machines Corporation, 1997-1998 *
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* Licensed Material - Program-Property of IBM - All Rights Reserved. *
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* US Government Users Restricted Rights - Use, duplication, or disclosure *
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* restricted by GSA ADP Schedule Contract with IBM Corp. *
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* *
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********************************************************************************
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*
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* File UCHAR.H
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*
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* Modification History:
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*
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* Date Name Description
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* 04/02/97 aliu Creation.
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* 03/29/99 helena Updated for C APIs.
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* 4/15/99 Madhu Updated for C Implementation and Javadoc
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* 5/20/99 Madhu Added the function u_getVersion()
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* 8/19/1999 srl Upgraded scripts to Unicode 3.0
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* 8/27/1999 schererm UCharDirection constants: U_...
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********************************************************************************
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*/
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#ifndef UCHAR_H
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#define UCHAR_H
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#include "utypes.h"
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/*===========================================================================*/
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/* Unicode version number */
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/*===========================================================================*/
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#define UNICODE_VERSION "3.0.0.beta"
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/**
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* The Unicode C API allows you to query the properties associated with individual
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* Unicode character values.
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* <p>
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* The Unicode character information, provided implicitly by the
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* Unicode character encoding standard, includes information about the script
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* (for example, symbols or control characters) to which the character belongs,
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* as well as semantic information such as whether a character is a digit or
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* uppercase, lowercase, or uncased.
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* <P>
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*/
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/**
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* Constants.
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*/
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/**
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* The minimum value a UChar can have. The lowest value a
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* UChar can have is 0x0000.
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*/
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static UChar UCHAR_MIN_VALUE;
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/**
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* The maximum value a UChar can have. The greatest value a
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* UChar can have is 0xffff.
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*/
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static UChar UCHAR_MAX_VALUE;
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/**
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* Data for enumerated Unicode general category types
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*/
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enum UCharCategory
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{
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U_UNASSIGNED = 0,
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U_UPPERCASE_LETTER = 1,
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U_LOWERCASE_LETTER = 2,
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U_TITLECASE_LETTER = 3,
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U_MODIFIER_LETTER = 4,
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U_OTHER_LETTER = 5,
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U_NON_SPACING_MARK = 6,
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U_ENCLOSING_MARK = 7,
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U_COMBINING_SPACING_MARK = 8,
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U_DECIMAL_DIGIT_NUMBER = 9,
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U_LETTER_NUMBER = 10,
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U_OTHER_NUMBER = 11,
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U_SPACE_SEPARATOR = 12,
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U_LINE_SEPARATOR = 13,
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U_PARAGRAPH_SEPARATOR = 14,
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U_CONTROL_CHAR = 15,
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U_FORMAT_CHAR = 16,
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U_PRIVATE_USE_CHAR = 17,
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U_SURROGATE = 18,
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U_DASH_PUNCTUATION = 19,
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U_START_PUNCTUATION = 20,
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U_END_PUNCTUATION = 21,
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U_CONNECTOR_PUNCTUATION = 22,
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U_OTHER_PUNCTUATION = 23,
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U_MATH_SYMBOL = 24,
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U_CURRENCY_SYMBOL = 25,
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U_MODIFIER_SYMBOL = 26,
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U_OTHER_SYMBOL = 27,
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U_INITIAL_PUNCTUATION = 28,
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U_FINAL_PUNCTUATION = 29,
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U_GENERAL_OTHER_TYPES = 30,
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U_CHAR_CATEGORY_COUNT
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};
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typedef enum UCharCategory UCharCategory;
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/**
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* This specifies the language directional property of a character set.
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*/
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enum UCharDirection {
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U_LEFT_TO_RIGHT = 0,
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U_RIGHT_TO_LEFT = 1,
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U_EUROPEAN_NUMBER = 2,
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U_EUROPEAN_NUMBER_SEPARATOR = 3,
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U_EUROPEAN_NUMBER_TERMINATOR = 4,
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U_ARABIC_NUMBER = 5,
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U_COMMON_NUMBER_SEPARATOR = 6,
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U_BLOCK_SEPARATOR = 7,
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U_SEGMENT_SEPARATOR = 8,
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U_WHITE_SPACE_NEUTRAL = 9,
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U_OTHER_NEUTRAL = 10,
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U_LEFT_TO_RIGHT_EMBEDDING = 11,
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U_LEFT_TO_RIGHT_OVERRIDE = 12,
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U_RIGHT_TO_LEFT_ARABIC = 13,
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U_RIGHT_TO_LEFT_EMBEDDING = 14,
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U_RIGHT_TO_LEFT_OVERRIDE = 15,
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U_POP_DIRECTIONAL_FORMAT = 16,
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U_DIR_NON_SPACING_MARK = 17,
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U_BOUNDARY_NEUTRAL = 18,
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U_CHAR_DIRECTION_COUNT
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};
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typedef enum UCharDirection UCharDirection;
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/**
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* Script range as defined in the Unicode standard.
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*/
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/* Generated from Unicode Data files */
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enum UCharScript {
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/* Script names */
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U_BASIC_LATIN,
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U_LATIN_1_SUPPLEMENT,
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U_LATIN_EXTENDED_A,
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U_LATIN_EXTENDED_B,
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U_IPA_EXTENSIONS,
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U_SPACING_MODIFIER_LETTERS,
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U_COMBINING_DIACRITICAL_MARKS,
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U_GREEK,
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U_CYRILLIC,
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U_ARMENIAN,
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U_HEBREW,
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U_ARABIC,
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U_SYRIAC,
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U_THAANA,
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U_DEVANAGARI,
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U_BENGALI,
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U_GURMUKHI,
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U_GUJARATI,
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U_ORIYA,
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U_TAMIL,
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U_TELUGU,
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U_KANNADA,
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U_MALAYALAM,
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U_SINHALA,
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U_THAI,
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U_LAO,
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U_TIBETAN,
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U_MYANMAR,
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U_GEORGIAN,
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U_HANGUL_JAMO,
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U_ETHIOPIC,
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U_CHEROKEE,
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U_UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS,
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U_OGHAM,
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U_RUNIC,
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U_KHMER,
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U_MONGOLIAN,
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U_LATIN_EXTENDED_ADDITIONAL,
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U_GREEK_EXTENDED,
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U_GENERAL_PUNCTUATION,
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U_SUPERSCRIPTS_AND_SUBSCRIPTS,
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U_CURRENCY_SYMBOLS,
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U_COMBINING_MARKS_FOR_SYMBOLS,
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U_LETTERLIKE_SYMBOLS,
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U_NUMBER_FORMS,
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U_ARROWS,
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U_MATHEMATICAL_OPERATORS,
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U_MISCELLANEOUS_TECHNICAL,
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U_CONTROL_PICTURES,
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U_OPTICAL_CHARACTER_RECOGNITION,
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U_ENCLOSED_ALPHANUMERICS,
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U_BOX_DRAWING,
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U_BLOCK_ELEMENTS,
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U_GEOMETRIC_SHAPES,
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U_MISCELLANEOUS_SYMBOLS,
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U_DINGBATS,
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U_BRAILLE_PATTERNS,
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U_CJK_RADICALS_SUPPLEMENT,
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U_KANGXI_RADICALS,
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U_IDEOGRAPHIC_DESCRIPTION_CHARACTERS,
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U_CJK_SYMBOLS_AND_PUNCTUATION,
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U_HIRAGANA,
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U_KATAKANA,
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U_BOPOMOFO,
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U_HANGUL_COMPATIBILITY_JAMO,
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U_KANBUN,
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U_BOPOMOFO_EXTENDED,
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U_ENCLOSED_CJK_LETTERS_AND_MONTHS,
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U_CJK_COMPATIBILITY,
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U_CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A,
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U_CJK_UNIFIED_IDEOGRAPHS,
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U_YI_SYLLABLES,
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U_YI_RADICALS,
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U_HANGUL_SYLLABLES,
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U_HIGH_SURROGATES,
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U_HIGH_PRIVATE_USE_SURROGATES,
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U_LOW_SURROGATES,
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U_PRIVATE_USE_AREA,
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U_CJK_COMPATIBILITY_IDEOGRAPHS,
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U_ALPHABETIC_PRESENTATION_FORMS,
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U_ARABIC_PRESENTATION_FORMS_A,
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U_COMBINING_HALF_MARKS,
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U_CJK_COMPATIBILITY_FORMS,
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U_SMALL_FORM_VARIANTS,
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U_ARABIC_PRESENTATION_FORMS_B,
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U_SPECIALS,
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U_HALFWIDTH_AND_FULLWIDTH_FORMS,
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U_CHAR_SCRIPT_COUNT,
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U_NO_SCRIPT=U_CHAR_SCRIPT_COUNT
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};
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typedef enum UCharScript UCharScript;
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/**
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* Values returned by the u_getCellWidth() function.
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*/
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enum UCellWidth
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{
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U_ZERO_WIDTH = 0,
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U_HALF_WIDTH = 1,
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U_FULL_WIDTH = 2,
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U_NEUTRAL_WIDTH = 3,
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U_CELL_WIDTH_COUNT
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};
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typedef enum UCellWidth UCellWidth;
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/**
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* Functions to classify characters.
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*/
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/**
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* Determines whether the specified UChar is a lowercase character
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* according to Unicode 2.1.2.
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*
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* @param ch the character to be tested
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* @return true if the character is lowercase; false otherwise.
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* @see UNICODE_VERSION
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* @see uisupper()
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* @see uistitle()
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* @see uislower()
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*/
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U_CAPI bool_t U_EXPORT2
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u_islower(UChar c);
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/**
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* Determines whether the specified character is an uppercase character
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* according to Unicode 2.1.2.
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*
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* @param ch the character to be tested
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* @return true if the character is uppercase; false otherwise.
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* @see uislower()
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* @see uistitle
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* @see utolower()
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*/
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U_CAPI bool_t U_EXPORT2
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u_isupper(UChar c);
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/**
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* Determines whether the specified character is a titlecase character
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* according to Unicode 2.1.2.
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*
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* @param ch the character to be tested
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* @return true if the character is titlecase; false otherwise.
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* @see uisupper()
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* @see uislower()
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* @see utotitle()
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*/
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U_CAPI bool_t U_EXPORT2
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u_istitle(UChar c);
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/**
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* Determines whether the specified character is a digit according to Unicode
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* 2.1.2.
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*
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* @param ch the character to be tested
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* @return true if the character is a digit; false otherwise.
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*/
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U_CAPI bool_t U_EXPORT2
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u_isdigit(UChar c);
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/**
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* Determines whether the specified numeric value is actually a defined character
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* according to Unicode 2.1.2.
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*
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* @param ch the character to be tested
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* @return true if the character has a defined Unicode meaning; false otherwise.
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*
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* @see uisdigit()
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* @see uisalpha()
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* @see uisalnum()
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* @see uisupper()
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* @see uislower()
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* @see uistitle()
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*/
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U_CAPI bool_t U_EXPORT2
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u_isdefined(UChar c);
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/**
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* Determines whether the specified character is a letter
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* according to Unicode 2.1.2.
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*
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* @param ch the character to be tested
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* @return true if the character is a letter; false otherwise.
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*
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* @see uisdigit()
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* @see uisalnum()
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*/
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U_CAPI bool_t U_EXPORT2
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u_isalpha(UChar c);
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/**
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* Determines if the specified character is a space character or not.
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*
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* @param ch the character to be tested
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* @return true if the character is a space character; false otherwise.
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*/
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U_CAPI bool_t U_EXPORT2
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u_isspace(UChar c);
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/**
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* Determines whether the specified character is a control character or not.
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*
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* @param ch the character to be tested
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* @return true if the Unicode character is a control character; false otherwise.
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*
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* @see uisprint()
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*/
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U_CAPI bool_t U_EXPORT2
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u_iscntrl(UChar c);
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/**
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* Determines whether the specified character is a printable character according
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* to Unicode 2.1.2.
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*
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* @param ch the character to be tested
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* @return true if the Unicode character is a printable character; false otherwise.
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*
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* @see uiscntrl()
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*/
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U_CAPI bool_t U_EXPORT2
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u_isprint(UChar c);
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/**
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* Determines whether the specified character is of the base form according
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* to Unicode 2.1.2.
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*
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* @param ch the character to be tested
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* @return true if the Unicode character is of the base form; false otherwise.
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*
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* @see uisalpha()
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* @see uisdigit()
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*/
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U_CAPI bool_t U_EXPORT2
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u_isbase(UChar c);
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/**
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* Returns the linguistic direction property of a character.
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* <P>
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* Returns the linguistic direction property of a character.
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* For example, 0x0041 (letter A) has the LEFT_TO_RIGHT directional
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* property.
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* @see UCharDirection
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*/
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U_CAPI UCharDirection U_EXPORT2
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u_charDirection(UChar c);
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/**
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* Returns a value indicating the display-cell width of the character
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* when used in Asian text, according to the Unicode standard (see p. 6-130
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* of The Unicode Standard, Version 2.0). The results for various characters
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* are as follows:
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* <P>
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* ZERO_WIDTH: Characters which are considered to take up no display-cell space:
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* control characters
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* format characters
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* line and paragraph separators
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* non-spacing marks
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* combining Hangul jungseong
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* combining Hangul jongseong
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* unassigned Unicode values
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* <P>
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* HALF_WIDTH: Characters which take up half a cell in standard Asian text:
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* all characters in the General Scripts Area except combining Hangul choseong
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* and the characters called out specifically above as ZERO_WIDTH
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* alphabetic and Arabic presentation forms
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* halfwidth CJK punctuation
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* halfwidth Katakana
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* halfwidth Hangul Jamo
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* halfwidth forms, arrows, and shapes
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* <P>
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* FULL_WIDTH: Characters which take up a full cell in standard Asian text:
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* combining Hangul choseong
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* all characters in the CJK Phonetics and Symbols Area
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* all characters in the CJK Ideographs Area
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* all characters in the Hangul Syllables Area
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* CJK compatibility ideographs
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* CJK compatibility forms
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* small form variants
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* fullwidth ASCII
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* fullwidth punctuation and currency signs
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* <P>
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* NEUTRAL: Characters whose cell width is context-dependent:
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* all characters in the Symbols Area, except those specifically called out above
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* all characters in the Surrogates Area
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* all charcaters in the Private Use Area
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* <P>
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* For Korean text, this algorithm should work properly with properly normalized Korean
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* text. Precomposed Hangul syllables and non-combining jamo are all considered full-
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* width characters. For combining jamo, we treat we treat choseong (initial consonants)
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* as double-width characters and junseong (vowels) and jongseong (final consonants)
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* as non-spacing marks. This will work right in text that uses the precomposed
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* choseong characters instead of teo choseong characters in a row, and which uses the
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* choseong filler character at the beginning of syllables that don't have an initial
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* consonant. The results may be slightly off with Korean text following different
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* conventions.
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*/
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U_CAPI uint16_t U_EXPORT2
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u_charCellWidth(UChar c);
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/**
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* Returns a value indicating a character category according to Unicode
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* 2.1.2.
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* @param c the character to be tested
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* @return a value of type int, the character category.
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* @see UCharCategory
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*/
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U_CAPI int8_t U_EXPORT2
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u_charType(UChar c);
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/**
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* Retrives the decimal numeric value of a digit character.
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* @param c the digit character for which to get the numeric value
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* @return the numeric value of ch in decimal radix. This method returns
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* -1 if ch is not a valid digit character.
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*/
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U_CAPI int32_t U_EXPORT2
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u_charDigitValue(UChar c);
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/**
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*
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* Returns the script associated with a character.
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* @see #UCharScript
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*/
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U_CAPI UCharScript U_EXPORT2
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u_charScript(UChar ch);
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/**
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* The following functions are java specific.
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*/
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/**
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* A convenience method for determining if a Unicode character
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* is allowed to start in a Unicode identifier.
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* A character may start a Unicode identifier if and only if
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* it is a letter.
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*
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* @param c the Unicode character.
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* @return TRUE if the character may start a Unicode identifier;
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* FALSE otherwise.
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* @see u_isalpha
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* @see u_isIDPart
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*/
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U_CAPI bool_t U_EXPORT2
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u_isIDStart(UChar c);
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/**
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* A convenience method for determining if a Unicode character
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* may be part of a Unicode identifier other than the starting
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* character.
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* <P>
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* A character may be part of a Unicode identifier if and only if
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* it is one of the following:
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* <ul>
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* <li> a letter
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* <li> a connecting punctuation character (such as "_").
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* <li> a digit
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* <li> a numeric letter (such as a Roman numeral character)
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* <li> a combining mark
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* <li> a non-spacing mark
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* <li> an ignorable control character
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* </ul>
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*
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* @param c the Unicode character.
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* @return TRUE if the character may be part of a Unicode identifier;
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* FALSE otherwise.
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* @see u_isIDIgnorable
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* @see u_isIDStart
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*/
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U_CAPI bool_t U_EXPORT2
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u_isIDPart(UChar c);
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/**
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* A convenience method for determining if a Unicode character
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* should be regarded as an ignorable character
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* in a Unicode identifier.
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* <P>
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* The following Unicode characters are ignorable in a
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* Unicode identifier:
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* <table>
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* <tr><td>0x0000 through 0x0008,</td>
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* <td>ISO control characters that</td></tr>
|
|
* <tr><td>0x000E through 0x001B,</td> <td>are not whitespace</td></tr>
|
|
* <tr><td>and 0x007F through 0x009F</td></tr>
|
|
* <tr><td>0x200C through 0x200F</td> <td>join controls</td></tr>
|
|
* <tr><td>0x200A through 0x200E</td> <td>bidirectional controls</td></tr>
|
|
* <tr><td>0x206A through 0x206F</td> <td>format controls</td></tr>
|
|
* <tr><td>0xFEFF</td> <td>zero-width no-break space</td></tr>
|
|
* </table>
|
|
*
|
|
* @param c the Unicode character.
|
|
* @return TRUE if the character may be part of a Unicode identifier;
|
|
* FALSE otherwise.
|
|
* @see u_isIDPart
|
|
*/
|
|
U_CAPI bool_t U_EXPORT2
|
|
u_isIDIgnorable(UChar c);
|
|
/**
|
|
* A convenience method for determining if a Unicode character
|
|
* is allowed as the first character in a Java identifier.
|
|
* <P>
|
|
* A character may start a Java identifier if and only if
|
|
* it is one of the following:
|
|
* <ul>
|
|
* <li> a letter
|
|
* <li> a currency symbol (such as "$")
|
|
* <li> a connecting punctuation symbol (such as "_").
|
|
* </ul>
|
|
*
|
|
* @param c the Unicode character.
|
|
* @return TRUE if the character may start a Java identifier;
|
|
* FALSE otherwise.
|
|
* @see u_isJavaIDPart
|
|
* @see u_isalpha
|
|
* @see u_isIDStart
|
|
*/
|
|
U_CAPI bool_t U_EXPORT2
|
|
u_isJavaIDStart(UChar c);
|
|
/**
|
|
* A convenience method for determining if a Unicode character
|
|
* may be part of a Java identifier other than the starting
|
|
* character.
|
|
* <P>
|
|
* A character may be part of a Java identifier if and only if
|
|
* it is one of the following:
|
|
* <ul>
|
|
* <li> a letter
|
|
* <li> a currency symbol (such as "$")
|
|
* <li> a connecting punctuation character (such as "_").
|
|
* <li> a digit
|
|
* <li> a numeric letter (such as a Roman numeral character)
|
|
* <li> a combining mark
|
|
* <li> a non-spacing mark
|
|
* <li> an ignorable control character
|
|
* </ul>
|
|
*
|
|
* @param c the Unicode character.
|
|
* @return TRUE if the character may be part of a Unicode identifier;
|
|
* FALSE otherwise.
|
|
* @see u_isIDIgnorable
|
|
* @see u_isJavaIDStart
|
|
* @see u_isalpha
|
|
* @see u_isdigit
|
|
* @see u_isIDPart
|
|
*/
|
|
|
|
U_CAPI bool_t U_EXPORT2
|
|
u_isJavaIDPart(UChar c);
|
|
|
|
/**
|
|
* Functions to change character case.
|
|
*/
|
|
|
|
/**
|
|
* The given character is mapped to its lowercase equivalent according to
|
|
* Unicode 2.1.2; if the character has no lowercase equivalent, the character
|
|
* itself is returned.
|
|
* <P>
|
|
* A character has a lowercase equivalent if and only if a lowercase mapping
|
|
* is specified for the character in the Unicode 2.1.2 attribute table.
|
|
* <P>
|
|
* utolower() only deals with the general letter case conversion.
|
|
* For language specific case conversion behavior, use ustrToUpper().
|
|
* For example, the case conversion for dot-less i and dotted I in Turkish,
|
|
* or for final sigma in Greek.
|
|
*
|
|
* @param ch the character to be converted
|
|
* @return the lowercase equivalent of the character, if any;
|
|
* otherwise the character itself.
|
|
*/
|
|
U_CAPI UChar U_EXPORT2
|
|
u_tolower(UChar c);
|
|
|
|
/**
|
|
* The given character is mapped to its uppercase equivalent according to Unicode
|
|
* 2.1.2; if the character has no uppercase equivalent, the character itself is
|
|
* returned.
|
|
* <P>
|
|
* utoupper() only deals with the general letter case conversion.
|
|
* For language specific case conversion behavior, use ustrToUpper().
|
|
* For example, the case conversion for dot-less i and dotted I in Turkish,
|
|
* or ess-zed (i.e., "sharp S") in German.
|
|
*
|
|
* @param ch the character to be converted
|
|
* @return the uppercase equivalent of the character, if any;
|
|
* otherwise the character itself.
|
|
*/
|
|
U_CAPI UChar U_EXPORT2
|
|
u_toupper(UChar c);
|
|
/**
|
|
* The given character is mapped to its titlecase equivalent according to Unicode
|
|
* 2.1.2. There are only four Unicode characters that are truly titlecase forms
|
|
* that are distinct from uppercase forms. As a rule, if a character has no
|
|
* true titlecase equivalent, its uppercase equivalent is returned.
|
|
* <P>
|
|
* A character has a titlecase equivalent if and only if a titlecase mapping
|
|
* is specified for the character in the Unicode 2.1.2 data.
|
|
*
|
|
* @param ch the character to be converted
|
|
* @return the titlecase equivalent of the character, if any;
|
|
* otherwise the character itself.
|
|
*/
|
|
U_CAPI UChar U_EXPORT2
|
|
u_totitle(UChar c);
|
|
|
|
/**
|
|
*
|
|
*The function is used to get the Unicode standard Version that is used
|
|
*@return the Unicode stabdard Version number
|
|
*/
|
|
U_CAPI const char* U_EXPORT2
|
|
u_getVersion(void);
|
|
|
|
#endif /*_UCHAR*/
|
|
/*eof*/
|