1/************************************************* 2* Perl-Compatible Regular Expressions * 3*************************************************/ 4 5/* PCRE is a library of functions to support regular expressions whose syntax 6and semantics are as close as possible to those of the Perl 5 language. 7 8 Written by Philip Hazel 9 Copyright (c) 1997-2009 University of Cambridge 10 11----------------------------------------------------------------------------- 12Redistribution and use in source and binary forms, with or without 13modification, are permitted provided that the following conditions are met: 14 15 * Redistributions of source code must retain the above copyright notice, 16 this list of conditions and the following disclaimer. 17 18 * Redistributions in binary form must reproduce the above copyright 19 notice, this list of conditions and the following disclaimer in the 20 documentation and/or other materials provided with the distribution. 21 22 * Neither the name of the University of Cambridge nor the names of its 23 contributors may be used to endorse or promote products derived from 24 this software without specific prior written permission. 25 26THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 27AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 30LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36POSSIBILITY OF SUCH DAMAGE. 37----------------------------------------------------------------------------- 38*/ 39 40 41/* This module contains an internal function that is used to match an extended 42class. It is used by both pcre_exec() and pcre_def_exec(). */ 43 44 45#ifdef HAVE_CONFIG_H 46#include "config.h" 47#endif 48 49#include "pcre_internal.h" 50 51 52/************************************************* 53* Match character against an XCLASS * 54*************************************************/ 55 56/* This function is called to match a character against an extended class that 57might contain values > 255 and/or Unicode properties. 58 59Arguments: 60 c the character 61 data points to the flag byte of the XCLASS data 62 63Returns: TRUE if character matches, else FALSE 64*/ 65 66BOOL 67_pcre_xclass(int c, const uschar *data) 68{ 69int t; 70BOOL negated = (*data & XCL_NOT) != 0; 71 72/* Character values < 256 are matched against a bitmap, if one is present. If 73not, we still carry on, because there may be ranges that start below 256 in the 74additional data. */ 75 76if (c < 256) 77 { 78 if ((*data & XCL_MAP) != 0 && (data[1 + c/8] & (1 << (c&7))) != 0) 79 return !negated; /* char found */ 80 } 81 82/* First skip the bit map if present. Then match against the list of Unicode 83properties or large chars or ranges that end with a large char. We won't ever 84encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */ 85 86if ((*data++ & XCL_MAP) != 0) data += 32; 87 88while ((t = *data++) != XCL_END) 89 { 90 int x, y; 91 if (t == XCL_SINGLE) 92 { 93 GETCHARINC(x, data); 94 if (c == x) return !negated; 95 } 96 else if (t == XCL_RANGE) 97 { 98 GETCHARINC(x, data); 99 GETCHARINC(y, data); 100 if (c >= x && c <= y) return !negated; 101 } 102 103#ifdef SUPPORT_UCP 104 else /* XCL_PROP & XCL_NOTPROP */ 105 { 106 const ucd_record *prop = GET_UCD(c); 107 108 switch(*data) 109 { 110 case PT_ANY: 111 if (t == XCL_PROP) return !negated; 112 break; 113 114 case PT_LAMP: 115 if ((prop->chartype == ucp_Lu || prop->chartype == ucp_Ll || prop->chartype == ucp_Lt) == 116 (t == XCL_PROP)) return !negated; 117 break; 118 119 case PT_GC: 120 if ((data[1] == _pcre_ucp_gentype[prop->chartype]) == (t == XCL_PROP)) return !negated; 121 break; 122 123 case PT_PC: 124 if ((data[1] == prop->chartype) == (t == XCL_PROP)) return !negated; 125 break; 126 127 case PT_SC: 128 if ((data[1] == prop->script) == (t == XCL_PROP)) return !negated; 129 break; 130 131 /* This should never occur, but compilers may mutter if there is no 132 default. */ 133 134 default: 135 return FALSE; 136 } 137 138 data += 2; 139 } 140#endif /* SUPPORT_UCP */ 141 } 142 143return negated; /* char did not match */ 144} 145 146/* End of pcre_xclass.c */ 147