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) 1997-2012 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 67PRIV(xclass)(int c, const pcre_uchar *data, BOOL utf) 68{ 69int t; 70BOOL negated = (*data & XCL_NOT) != 0; 71 72(void)utf; 73#ifdef COMPILE_PCRE8 74/* In 8 bit mode, this must always be TRUE. Help the compiler to know that. */ 75utf = TRUE; 76#endif 77 78/* Character values < 256 are matched against a bitmap, if one is present. If 79not, we still carry on, because there may be ranges that start below 256 in the 80additional data. */ 81 82if (c < 256) 83 { 84 if ((*data & XCL_MAP) != 0 && 85 (((pcre_uint8 *)(data + 1))[c/8] & (1 << (c&7))) != 0) 86 return !negated; /* char found */ 87 } 88 89/* First skip the bit map if present. Then match against the list of Unicode 90properties or large chars or ranges that end with a large char. We won't ever 91encounter XCL_PROP or XCL_NOTPROP when UCP support is not compiled. */ 92 93if ((*data++ & XCL_MAP) != 0) data += 32 / sizeof(pcre_uchar); 94 95while ((t = *data++) != XCL_END) 96 { 97 int x, y; 98 if (t == XCL_SINGLE) 99 { 100#ifdef SUPPORT_UTF 101 if (utf) 102 { 103 GETCHARINC(x, data); /* macro generates multiple statements */ 104 } 105 else 106#endif 107 x = *data++; 108 if (c == x) return !negated; 109 } 110 else if (t == XCL_RANGE) 111 { 112#ifdef SUPPORT_UTF 113 if (utf) 114 { 115 GETCHARINC(x, data); /* macro generates multiple statements */ 116 GETCHARINC(y, data); /* macro generates multiple statements */ 117 } 118 else 119#endif 120 { 121 x = *data++; 122 y = *data++; 123 } 124 if (c >= x && c <= y) return !negated; 125 } 126 127#ifdef SUPPORT_UCP 128 else /* XCL_PROP & XCL_NOTPROP */ 129 { 130 const ucd_record *prop = GET_UCD(c); 131 132 switch(*data) 133 { 134 case PT_ANY: 135 if (t == XCL_PROP) return !negated; 136 break; 137 138 case PT_LAMP: 139 if ((prop->chartype == ucp_Lu || prop->chartype == ucp_Ll || 140 prop->chartype == ucp_Lt) == (t == XCL_PROP)) return !negated; 141 break; 142 143 case PT_GC: 144 if ((data[1] == PRIV(ucp_gentype)[prop->chartype]) == (t == XCL_PROP)) 145 return !negated; 146 break; 147 148 case PT_PC: 149 if ((data[1] == prop->chartype) == (t == XCL_PROP)) return !negated; 150 break; 151 152 case PT_SC: 153 if ((data[1] == prop->script) == (t == XCL_PROP)) return !negated; 154 break; 155 156 case PT_ALNUM: 157 if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L || 158 PRIV(ucp_gentype)[prop->chartype] == ucp_N) == (t == XCL_PROP)) 159 return !negated; 160 break; 161 162 case PT_SPACE: /* Perl space */ 163 if ((PRIV(ucp_gentype)[prop->chartype] == ucp_Z || 164 c == CHAR_HT || c == CHAR_NL || c == CHAR_FF || c == CHAR_CR) 165 == (t == XCL_PROP)) 166 return !negated; 167 break; 168 169 case PT_PXSPACE: /* POSIX space */ 170 if ((PRIV(ucp_gentype)[prop->chartype] == ucp_Z || 171 c == CHAR_HT || c == CHAR_NL || c == CHAR_VT || 172 c == CHAR_FF || c == CHAR_CR) == (t == XCL_PROP)) 173 return !negated; 174 break; 175 176 case PT_WORD: 177 if ((PRIV(ucp_gentype)[prop->chartype] == ucp_L || 178 PRIV(ucp_gentype)[prop->chartype] == ucp_N || c == CHAR_UNDERSCORE) 179 == (t == XCL_PROP)) 180 return !negated; 181 break; 182 183 /* This should never occur, but compilers may mutter if there is no 184 default. */ 185 186 default: 187 return FALSE; 188 } 189 190 data += 2; 191 } 192#endif /* SUPPORT_UCP */ 193 } 194 195return negated; /* char did not match */ 196} 197 198/* End of pcre_xclass.c */ 199