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