1 // 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 /* 4 ******************************************************************************* 5 * Copyright (C) 2011, International Business Machines 6 * Corporation and others. All Rights Reserved. 7 ******************************************************************************* 8 * file name: patternprops.h 9 * encoding: UTF-8 10 * tab size: 8 (not used) 11 * indentation:4 12 * 13 * created on: 2011mar13 14 * created by: Markus W. Scherer 15 */ 16 17 #ifndef __PATTERNPROPS_H__ 18 #define __PATTERNPROPS_H__ 19 20 #include "unicode/utypes.h" 21 22 U_NAMESPACE_BEGIN 23 24 /** 25 * Implements the immutable Unicode properties Pattern_Syntax and Pattern_White_Space. 26 * Hardcodes these properties, does not load data, does not depend on other ICU classes. 27 * <p> 28 * Note: Both properties include ASCII as well as non-ASCII, non-Latin-1 code points, 29 * and both properties only include BMP code points (no supplementary ones). 30 * Pattern_Syntax includes some unassigned code points. 31 * <p> 32 * [:Pattern_White_Space:] = 33 * [\u0009-\u000D\ \u0085\u200E\u200F\u2028\u2029] 34 * <p> 35 * [:Pattern_Syntax:] = 36 * [!-/\:-@\[-\^`\{-~\u00A1-\u00A7\u00A9\u00AB\u00AC\u00AE 37 * \u00B0\u00B1\u00B6\u00BB\u00BF\u00D7\u00F7 38 * \u2010-\u2027\u2030-\u203E\u2041-\u2053\u2055-\u205E 39 * \u2190-\u245F\u2500-\u2775\u2794-\u2BFF\u2E00-\u2E7F 40 * \u3001-\u3003\u3008-\u3020\u3030\uFD3E\uFD3F\uFE45\uFE46] 41 * @author mscherer 42 */ 43 class U_COMMON_API PatternProps { 44 public: 45 /** 46 * @return TRUE if c is a Pattern_Syntax code point. 47 */ 48 static UBool isSyntax(UChar32 c); 49 50 /** 51 * @return TRUE if c is a Pattern_Syntax or Pattern_White_Space code point. 52 */ 53 static UBool isSyntaxOrWhiteSpace(UChar32 c); 54 55 /** 56 * @return TRUE if c is a Pattern_White_Space character. 57 */ 58 static UBool isWhiteSpace(UChar32 c); 59 60 /** 61 * Skips over Pattern_White_Space starting at s. 62 * @return The smallest pointer at or after s with a non-white space character. 63 */ 64 static const UChar *skipWhiteSpace(const UChar *s, int32_t length); 65 66 /** 67 * @return s except with leading and trailing Pattern_White_Space removed and length adjusted. 68 */ 69 static const UChar *trimWhiteSpace(const UChar *s, int32_t &length); 70 71 /** 72 * Tests whether the string contains a "pattern identifier", that is, 73 * whether it contains only non-Pattern_White_Space, non-Pattern_Syntax characters. 74 * @return TRUE if there are no Pattern_White_Space or Pattern_Syntax characters in s. 75 */ 76 static UBool isIdentifier(const UChar *s, int32_t length); 77 78 /** 79 * Skips over a "pattern identifier" starting at index s. 80 * @return The smallest pointer at or after s with 81 * a Pattern_White_Space or Pattern_Syntax character. 82 */ 83 static const UChar *skipIdentifier(const UChar *s, int32_t length); 84 85 private: 86 PatternProps(); // no constructor: all static methods 87 }; 88 89 U_NAMESPACE_END 90 91 #endif // __PATTERNPROPS_H__ 92
