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99 lines
3.2 KiB
99 lines
3.2 KiB
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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* Copyright (C) 2011, International Business Machines
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* Corporation and others. All Rights Reserved.
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*******************************************************************************
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* file name: patternprops.h
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* encoding: UTF-8
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2011mar13
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* created by: Markus W. Scherer
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*/
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#ifndef __PATTERNPROPS_H__
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#define __PATTERNPROPS_H__
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#include "unicode/unistr.h"
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#include "unicode/utypes.h"
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U_NAMESPACE_BEGIN
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/**
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* Implements the immutable Unicode properties Pattern_Syntax and Pattern_White_Space.
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* Hardcodes these properties, does not load data, does not depend on other ICU classes.
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* <p>
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* Note: Both properties include ASCII as well as non-ASCII, non-Latin-1 code points,
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* and both properties only include BMP code points (no supplementary ones).
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* Pattern_Syntax includes some unassigned code points.
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* <p>
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* [:Pattern_White_Space:] =
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* [\u0009-\u000D\ \u0085\u200E\u200F\u2028\u2029]
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* <p>
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* [:Pattern_Syntax:] =
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* [!-/\:-@\[-\^`\{-~\u00A1-\u00A7\u00A9\u00AB\u00AC\u00AE
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* \u00B0\u00B1\u00B6\u00BB\u00BF\u00D7\u00F7
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* \u2010-\u2027\u2030-\u203E\u2041-\u2053\u2055-\u205E
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* \u2190-\u245F\u2500-\u2775\u2794-\u2BFF\u2E00-\u2E7F
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* \u3001-\u3003\u3008-\u3020\u3030\uFD3E\uFD3F\uFE45\uFE46]
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* @author mscherer
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*/
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class U_COMMON_API PatternProps {
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public:
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/**
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* @return true if c is a Pattern_Syntax code point.
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*/
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static UBool isSyntax(UChar32 c);
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/**
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* @return true if c is a Pattern_Syntax or Pattern_White_Space code point.
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*/
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static UBool isSyntaxOrWhiteSpace(UChar32 c);
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/**
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* @return true if c is a Pattern_White_Space character.
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*/
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static UBool isWhiteSpace(UChar32 c);
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/**
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* Skips over Pattern_White_Space starting at s.
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* @return The smallest pointer at or after s with a non-white space character.
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*/
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static const UChar *skipWhiteSpace(const UChar *s, int32_t length);
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/**
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* Skips over Pattern_White_Space starting at index start in s.
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* @return The smallest index at or after start with a non-white space character.
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*/
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static int32_t skipWhiteSpace(const UnicodeString &s, int32_t start);
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/**
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* @return s except with leading and trailing Pattern_White_Space removed and length adjusted.
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*/
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static const UChar *trimWhiteSpace(const UChar *s, int32_t &length);
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/**
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* Tests whether the string contains a "pattern identifier", that is,
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* whether it contains only non-Pattern_White_Space, non-Pattern_Syntax characters.
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* @return true if there are no Pattern_White_Space or Pattern_Syntax characters in s.
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*/
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static UBool isIdentifier(const UChar *s, int32_t length);
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/**
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* Skips over a "pattern identifier" starting at index s.
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* @return The smallest pointer at or after s with
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* a Pattern_White_Space or Pattern_Syntax character.
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*/
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static const UChar *skipIdentifier(const UChar *s, int32_t length);
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private:
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PatternProps(); // no constructor: all static methods
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};
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U_NAMESPACE_END
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#endif // __PATTERNPROPS_H__
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