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649 lines
23 KiB
C++
649 lines
23 KiB
C++
/*
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*****************************************************************************************
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* *
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* COPYRIGHT: *
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* (C) Copyright Taligent, Inc., 1996, 1997 *
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* (C) Copyright International Business Machines Corporation, 1996, 1997 *
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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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// Copyright (C) 1996-1997 Taligent, Inc. All rights reserved.
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//
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// FILE NAME : unicode.h
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//
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// CREATED
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// Wednesday, December 11, 1996
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//
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// CREATED BY
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// Helena Shih
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//
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//
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//********************************************************************************************
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#ifndef _UNICODE
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#define _UNICODE
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#include "ptypes.h"
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class CompactByteArray;
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class CompactShortArray;
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#ifdef NLS_MAC
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#pragma export on
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#endif
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/**
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* The Unicode class 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 sript
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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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* @subclassing Do not subclass.
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*/
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class T_UTILITY_API Unicode
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{
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public:
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/**
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* The minimum value a UniChar can have. The lowest value a
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* UniChar can have is 0x0000.
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*/
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static const UniChar MIN_VALUE;
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/**
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* The maximum value a UniChar can have. The greatest value a
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* UniChar can have is 0xffff.
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*/
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static const UniChar MAX_VALUE;
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/**
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* Public data for enumerated Unicode general category types
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*/
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enum EUnicodeGeneralTypes
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{
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UNASSIGNED = 0,
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UPPERCASE_LETTER = 1,
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LOWERCASE_LETTER = 2,
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TITLECASE_LETTER = 3,
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MODIFIER_LETTER = 4,
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OTHER_LETTER = 5,
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NON_SPACING_MARK = 6,
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ENCLOSING_MARK = 7,
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COMBINING_SPACING_MARK = 8,
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DECIMAL_DIGIT_NUMBER = 9,
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LETTER_NUMBER = 10,
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OTHER_NUMBER = 11,
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SPACE_SEPARATOR = 12,
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LINE_SEPARATOR = 13,
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PARAGRAPH_SEPARATOR = 14,
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CONTROL = 15,
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FORMAT = 16,
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PRIVATE_USE = 17,
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SURROGATE = 18,
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DASH_PUNCTUATION = 19,
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START_PUNCTUATION = 20,
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END_PUNCTUATION = 21,
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CONNECTOR_PUNCTUATION = 22,
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OTHER_PUNCTUATION = 23,
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MATH_SYMBOL = 24,
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CURRENCY_SYMBOL = 25,
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MODIFIER_SYMBOL = 26,
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OTHER_SYMBOL = 27,
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GENERAL_TYPES_COUNT = 28
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};
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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 EDirectionProperty {
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LEFT_TO_RIGHT = 0,
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RIGHT_TO_LEFT = 1,
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EUROPEAN_NUMBER = 2,
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EUROPEAN_NUMBER_SEPARATOR = 3,
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EUROPEAN_NUMBER_TERMINATOR = 4,
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ARABIC_NUMBER = 5,
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COMMON_NUMBER_SEPARATOR = 6,
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BLOCK_SEPARATOR = 7,
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SEGMENT_SEPARATOR = 8,
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WHITE_SPACE_NEUTRAL = 9,
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OTHER_NEUTRAL = 10
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};
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/**
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* Values returned by the getCellWidth() function.
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* @see Unicode#getCellWidth
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*/
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enum ECellWidths
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{
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ZERO_WIDTH = 0,
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HALF_WIDTH = 1,
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FULL_WIDTH = 2,
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NEUTRAL = 3
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};
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/**
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* Determines whether the specified UniChar is a lowercase character
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* according to Unicode 2.0.14.
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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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*
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* @see Unicode#isUpperCase
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* @see Unicode#isTitleCase
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* @see Unicode#toLowerCase
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*/
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static t_bool isLowerCase( UniChar ch);
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/**
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* Determines whether the specified character is an uppercase character
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* according to Unicode 2.0.14.
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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 Unicode#isLowerCase
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* @see Unicode#isTitleCase
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* @see Unicode#toUpperCase
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*/
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static t_bool isUpperCase( UniChar ch);
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/**
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* Determines whether the specified character is a titlecase character
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* according to Unicode 2.0.14.
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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 Unicode#isUpperCase
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* @see Unicode#isLowerCase
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* @see Unicode#toTitleCase
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*/
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static t_bool isTitleCase( UniChar ch);
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/**
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* Determines whether the specified character is a digit according to Unicode
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* 2.0.14.
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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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static t_bool isDigit( UniChar ch) ;
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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 2.0.14.
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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 Unicode#isDigit
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* @see Unicode#isLetter
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* @see Unicode#isLetterOrDigit
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* @see Unicode#isUpperCase
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* @see Unicode#isLowerCase
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* @see Unicode#isTitleCase
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*/
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static t_bool isDefined(UniChar ch);
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/**
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* Determines whether the specified character is a control character according
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* to Unicode 2.0.14.
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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 Unicode#isPrintable
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*/
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static t_bool isControl(UniChar ch);
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/**
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* Determines whether the specified character is a printable character according
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* to Unicode 2.0.14.
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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 Unicode#isControl
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*/
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static t_bool isPrintable(UniChar ch);
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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 2.0.14.
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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 Unicode#isLetter
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* @see Unicode#isDigit
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*/
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static t_bool isBaseForm(UniChar ch);
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/**
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* Determines whether the specified character is a letter
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* according to Unicode 2.0.14.
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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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*
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* @see Unicode#isDigit
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* @see Unicode#isLetterOrDigit
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* @see Unicode#isUpperCase
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* @see Unicode#isLowerCase
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* @see Unicode#isTitleCase
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*/
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static t_bool isLetter(UniChar ch);
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/**
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* A convenience method for determining if a Unicode character
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* is allowed as the first character in a Java identifier.
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* <P>
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* A character may start a Java 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 currency symbol (such as "$")
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* <li> a connecting punctuation symbol (such as "_").
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* </ul>
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*
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* @param ch the Unicode character.
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* @return TRUE if the character may start a Java identifier;
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* FALSE otherwise.
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* @see isJavaIdentifierPart
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* @see isLetter
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* @see isUnicodeIdentifierStart
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*/
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static t_bool isJavaIdentifierStart(UniChar ch);
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/**
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* A convenience method for determining if a Unicode character
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* may be part of a Java identifier other than the starting
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* character.
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* <P>
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* A character may be part of a Java identifier if and only if
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* it is one of the following:
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* <ul>
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* <li> a letter
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* <li> a currency symbol (such as "$")
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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 ch 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 isIdentifierIgnorable
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* @see isJavaIdentifierStart
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* @see isLetter
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* @see isDigit
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* @see isUnicodeIdentifierPart
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*/
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static t_bool isJavaIdentifierPart(UniChar ch);
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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 ch 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 isJavaIdentifierStart
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* @see isLetter
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* @see isUnicodeIdentifierPart
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*/
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static t_bool isUnicodeIdentifierStart(UniChar ch);
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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 ch 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 isIdentifierIgnorable
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* @see isJavaIdentifierPart
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* @see isLetterOrDigit
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* @see isUnicodeIdentifierStart
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*/
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static t_bool isUnicodeIdentifierPart(UniChar ch);
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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 in a Java
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* identifier or a Unicode identifier.
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* <P>
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* The following Unicode characters are ignorable in a Java identifier
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* or a 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>
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* <tr><td>0x000E through 0x001B,</td> <td>are not whitespace</td></tr>
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* <tr><td>and 0x007F through 0x009F</td></tr>
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* <tr><td>0x200C through 0x200F</td> <td>join controls</td></tr>
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* <tr><td>0x200A through 0x200E</td> <td>bidirectional controls</td></tr>
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* <tr><td>0x206A through 0x206F</td> <td>format controls</td></tr>
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* <tr><td>0xFEFF</td> <td>zero-width no-break space</td></tr>
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* </table>
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*
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* @param ch 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 isJavaIdentifierPart
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* @see isUnicodeIdentifierPart
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*/
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static t_bool isIdentifierIgnorable(UniChar ch);
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/**
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* The given character is mapped to its lowercase equivalent according to
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* Unicode 2.0.14; if the character has no lowercase equivalent, the character
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* itself is returned.
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* <P>
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* A character has a lowercase equivalent if and only if a lowercase mapping
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* is specified for the character in the Unicode 2.0 attribute table.
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* <P>
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* Unicode::toLowerCase() only deals with the general letter case conversion.
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* For language specific case conversion behavior, use UnicodeString::toLower().
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* For example, the case conversion for dot-less i and dotted I in Turkish,
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* or for final sigma in Greek.
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*
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* @param ch the character to be converted
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* @return the lowercase equivalent of the character, if any;
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* otherwise the character itself.
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*
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* @see UnicodeString#toLower
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* @see Unicode#isLowerCase
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* @see Unicode#isUpperCase
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* @see Unicode#toUpperCase
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* @see Unicode#toTitleCase
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*/
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static UniChar toLowerCase(UniChar ch);
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/**
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* The given character is mapped to its uppercase equivalent according to Unicode
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* 2.0.14; if the character has no uppercase equivalent, the character itself is
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* returned.
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* <P>
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* Unicode::toUpperCase() only deals with the general letter case conversion.
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* For language specific case conversion behavior, use UnicodeString::toUpper().
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* For example, the case conversion for dot-less i and dotted I in Turkish,
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* or ess-zed (i.e., "sharp S") in German.
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*
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* @param ch the character to be converted
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* @return the uppercase equivalent of the character, if any;
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* otherwise the character itself.
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*
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* @see UnicodeString#toUpper
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* @see Unicode#isUpperCase
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* @see Unicode#isLowerCase
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* @see Unicode#toLowerCase
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* @see Unicode#toTitleCase
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*/
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static UniChar toUpperCase(UniChar ch);
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/**
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* The given character is mapped to its titlecase equivalent according to Unicode
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* 2.0.14. There are only four Unicode characters that are truly titlecase forms
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* that are distinct from uppercase forms. As a rule, if a character has no
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* true titlecase equivalent, its uppercase equivalent is returned.
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* <P>
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* A character has a titlecase equivalent if and only if a titlecase mapping
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* is specified for the character in the Unicode 2.0.14 data.
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*
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* @param ch the character to be converted
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* @return the titlecase equivalent of the character, if any;
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* otherwise the character itself.
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* @see Unicode#isTitleCase
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* @see Unicode#toUpperCase
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* @see Unicode#toLowerCase
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*/
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static UniChar toTitleCase(UniChar ch);
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/**
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* Determines if the specified character is a Unicode space character
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* according to Unicode 2.0.14.
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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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static t_bool isSpaceChar(UniChar ch);
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/**
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* Returns a value indicating a character category according to Unicode
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* 2.0.14.
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* @param ch the character to be tested
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* @return a value of type int, the character category.
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* @see Unicode#UNASSIGNED
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* @see Unicode#UPPERCASE_LETTER
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* @see Unicode#LOWERCASE_LETTER
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* @see Unicode#TITLECASE_LETTER
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* @see Unicode#MODIFIER_LETTER
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* @see Unicode#OTHER_LETTER
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* @see Unicode#NON_SPACING_MARK
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* @see Unicode#ENCLOSING_MARK
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* @see Unicode#COMBINING_SPACING_MARK
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* @see Unicode#DECIMAL_DIGIT_NUMBER
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* @see Unicode#OTHER_NUMBER
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* @see Unicode#SPACE_SEPARATOR
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* @see Unicode#LINE_SEPARATOR
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* @see Unicode#PARAGRAPH_SEPARATOR
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* @see Unicode#CONTROL
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* @see Unicode#PRIVATE_USE
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* @see Unicode#SURROGATE
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* @see Unicode#DASH_PUNCTUATION
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* @see Unicode#OPEN_PUNCTUATION
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* @see Unicode#CLOSE_PUNCTUATION
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* @see Unicode#CONNECTOR_PUNCTUATION
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* @see Unicode#OTHER_PUNCTUATION
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* @see Unicode#LETTER_NUMBER
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* @see Unicode#MATH_SYMBOL
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* @see Unicode#CURRENCY_SYMBOL
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* @see Unicode#MODIFIER_SYMBOL
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* @see Unicode#OTHER_SYMBOL
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*/
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static t_int8 getType(UniChar ch);
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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 #EDirectionProperty
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*/
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static EDirectionProperty characterDirection(UniChar ch);
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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 characters 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)
|
|
* as double-width characters and junseong (vowels) and jongseong (final consonants)
|
|
* as non-spacing marks. This will work right in text that uses the precomposed
|
|
* choseong characters instead of teo choseong characters in a row, and which uses the
|
|
* choseong filler character at the beginning of syllables that don't have an initial
|
|
* consonant. The results may be slightly off with Korean text following different
|
|
* conventions.
|
|
*/
|
|
static t_uint16 getCellWidth(UniChar ch);
|
|
|
|
static UniChar* toLowerCase(UniChar* ch, t_int32 size);
|
|
static UniChar* toUpperCase(UniChar* ch, t_int32 size);
|
|
static int compare(const UniChar* ch, t_int32 size, const UniChar* ch1, t_int32 size1);
|
|
static int compareIgnoreCase(const UniChar* ch, t_int32 size, const UniChar* ch1, t_int32 size1);
|
|
static TextOffset indexOf(const UniChar* ch, t_int32 size, const UniChar* character, t_int32 length, TextOffset fromOffset = 0);
|
|
static TextOffset lastIndexOf(const UniChar* ch, t_int32 size, const UniChar* character, t_int32 length, TextOffset fromOffset = 0);
|
|
static size_t length(const UniChar* str);
|
|
static UniChar* copy(const UniChar* str);
|
|
|
|
|
|
//
|
|
// Netscape Added Methods
|
|
//
|
|
|
|
/**
|
|
* Releases a UniChar array allocated by one of the Unicode methods.
|
|
*/
|
|
static void release(UniChar* buffer);
|
|
|
|
/**
|
|
* Returns a pointer to the first instance of ch in the
|
|
* Unicode string.
|
|
* @param str string to search
|
|
* @param strLength length of str in UniChars
|
|
* @param ch UniChar to search for
|
|
*/
|
|
static const UniChar* strchr(const UniChar* str, size_t strLength, UniChar ch);
|
|
|
|
/**
|
|
* Returns a pointer to the last instance of ch in the
|
|
* Unicode string.
|
|
* @param str string to search
|
|
* @param strLength length of str in UniChars
|
|
* @param ch UniChar to search for
|
|
*/
|
|
static const UniChar* strrchr(const UniChar* str, size_t strLength, UniChar ch);
|
|
|
|
/**
|
|
* Compares two UniChar arrays based on the underlying file system
|
|
* mode of comparison.
|
|
* @param source array to be compared
|
|
* @param sourceLength length of source in UniChars
|
|
* @param target array to be compared
|
|
* @param targetLength length of target in UniChars
|
|
*/
|
|
static int fileNameCompare(const UniChar* source, size_t sourceLength, const UniChar* target, size_t targetLength);
|
|
|
|
/**
|
|
* Concatenates two UniChar arrays and returns the result in a new buffer
|
|
* @param str1 first string
|
|
* @param sourceLength length of str1 in UniChars
|
|
* @param str2 second string
|
|
* @param str2Length length of second string
|
|
*/
|
|
static UniChar* appendString(const UniChar* str1,size_t str1Length, const UniChar* str2,size_t str2Length);
|
|
|
|
/**
|
|
* Regular Expression-like search through a UniChar string.
|
|
* @param string string to search
|
|
* @param stringLength length of string in UniChars
|
|
* @param expression regular expression (as a C-string)
|
|
*/
|
|
static TextOffset regularExpressionSearch(const UniChar* string, size_t stringLength, const char* expression);
|
|
|
|
/**
|
|
* Regular Expression-like search through a UniChar string.
|
|
* @param source string to search
|
|
* @param sourceLength length of source in UniChars
|
|
* @param expression regular expression (as a UniChar)
|
|
* @param expressionLength length of regular expression in UniChars
|
|
*/
|
|
static TextOffset regularExpressionSearch(const UniChar* string, size_t stringLength, const UniChar* expression, size_t expressionLength);
|
|
|
|
protected:
|
|
// These constructors, destructor, and assignment operator must
|
|
// be protected (not private, as they semantically are) to make
|
|
// various UNIX compilers happy. [LIU]
|
|
Unicode();
|
|
Unicode( const Unicode& other);
|
|
~Unicode();
|
|
const Unicode& operator=( const Unicode& other);
|
|
|
|
private:
|
|
static const t_int8 isLetterMask;
|
|
static const t_uint16 indicies[];
|
|
static const t_int8 values[];
|
|
static const t_int32 offsetCount;
|
|
static const t_uint16 caseIndex[];
|
|
static const t_int16 caseValues[];
|
|
static const t_int32 caseCount;
|
|
static const t_uint16 fCharDirIndices[];
|
|
static const t_int8 fCharDirValues[];
|
|
static const t_int32 fCharDirCount;
|
|
|
|
static CompactByteArray *tables;
|
|
static CompactShortArray *ulTables;
|
|
static CompactByteArray *dirTables;
|
|
|
|
static t_bool tablesCreated;
|
|
static t_bool ulTablesCreated;
|
|
static t_bool dirTablesCreated;
|
|
static void createTables();
|
|
static void createUlTables();
|
|
static void createDirTables();
|
|
|
|
};
|
|
|
|
#ifdef NLS_MAC
|
|
#pragma export off
|
|
#endif
|
|
|
|
|
|
#endif
|