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