1 /************************************************* 2 * Perl-Compatible Regular Expressions * 3 *************************************************/ 4 5 /* PCRE is a library of functions to support regular expressions whose syntax 6 and semantics are as close as possible to those of the Perl 5 language. 7 8 Written by Philip Hazel 9 Copyright (c) 1997-2013 University of Cambridge 10 11 ----------------------------------------------------------------------------- 12 Redistribution and use in source and binary forms, with or without 13 modification, 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 26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 27 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 30 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 POSSIBILITY OF SUCH DAMAGE. 37 ----------------------------------------------------------------------------- 38 */ 39 40 41 /* This module contains the external function pcre_fullinfo(), which returns 42 information about a compiled pattern. */ 43 44 45 #ifdef HAVE_CONFIG_H 46 #include "config.h" 47 #endif 48 49 #include "pcre_internal.h" 50 51 52 /************************************************* 53 * Return info about compiled pattern * 54 *************************************************/ 55 56 /* This is a newer "info" function which has an extensible interface so 57 that additional items can be added compatibly. 58 59 Arguments: 60 argument_re points to compiled code 61 extra_data points extra data, or NULL 62 what what information is required 63 where where to put the information 64 65 Returns: 0 if data returned, negative on error 66 */ 67 68 #if defined COMPILE_PCRE8 69 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION 70 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, 71 int what, void *where) 72 #elif defined COMPILE_PCRE16 73 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION 74 pcre16_fullinfo(const pcre16 *argument_re, const pcre16_extra *extra_data, 75 int what, void *where) 76 #elif defined COMPILE_PCRE32 77 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION 78 pcre32_fullinfo(const pcre32 *argument_re, const pcre32_extra *extra_data, 79 int what, void *where) 80 #endif 81 { 82 const REAL_PCRE *re = (const REAL_PCRE *)argument_re; 83 const pcre_study_data *study = NULL; 84 85 if (re == NULL || where == NULL) return PCRE_ERROR_NULL; 86 87 if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0) 88 study = (const pcre_study_data *)extra_data->study_data; 89 90 /* Check that the first field in the block is the magic number. If it is not, 91 return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to 92 REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which 93 means that the pattern is likely compiled with different endianness. */ 94 95 if (re->magic_number != MAGIC_NUMBER) 96 return re->magic_number == REVERSED_MAGIC_NUMBER? 97 PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC; 98 99 /* Check that this pattern was compiled in the correct bit mode */ 100 101 if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE; 102 103 switch (what) 104 { 105 case PCRE_INFO_OPTIONS: 106 *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS; 107 break; 108 109 case PCRE_INFO_SIZE: 110 *((size_t *)where) = re->size; 111 break; 112 113 case PCRE_INFO_STUDYSIZE: 114 *((size_t *)where) = (study == NULL)? 0 : study->size; 115 break; 116 117 case PCRE_INFO_JITSIZE: 118 #ifdef SUPPORT_JIT 119 *((size_t *)where) = 120 (extra_data != NULL && 121 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 && 122 extra_data->executable_jit != NULL)? 123 PRIV(jit_get_size)(extra_data->executable_jit) : 0; 124 #else 125 *((size_t *)where) = 0; 126 #endif 127 break; 128 129 case PCRE_INFO_CAPTURECOUNT: 130 *((int *)where) = re->top_bracket; 131 break; 132 133 case PCRE_INFO_BACKREFMAX: 134 *((int *)where) = re->top_backref; 135 break; 136 137 case PCRE_INFO_FIRSTBYTE: 138 *((int *)where) = 139 ((re->flags & PCRE_FIRSTSET) != 0)? (int)re->first_char : 140 ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2; 141 break; 142 143 case PCRE_INFO_FIRSTCHARACTER: 144 *((pcre_uint32 *)where) = 145 (re->flags & PCRE_FIRSTSET) != 0 ? re->first_char : 0; 146 break; 147 148 case PCRE_INFO_FIRSTCHARACTERFLAGS: 149 *((int *)where) = 150 ((re->flags & PCRE_FIRSTSET) != 0) ? 1 : 151 ((re->flags & PCRE_STARTLINE) != 0) ? 2 : 0; 152 break; 153 154 /* Make sure we pass back the pointer to the bit vector in the external 155 block, not the internal copy (with flipped integer fields). */ 156 157 case PCRE_INFO_FIRSTTABLE: 158 *((const pcre_uint8 **)where) = 159 (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)? 160 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL; 161 break; 162 163 case PCRE_INFO_MINLENGTH: 164 *((int *)where) = 165 (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)? 166 (int)(study->minlength) : -1; 167 break; 168 169 case PCRE_INFO_JIT: 170 *((int *)where) = extra_data != NULL && 171 (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 && 172 extra_data->executable_jit != NULL; 173 break; 174 175 case PCRE_INFO_LASTLITERAL: 176 *((int *)where) = 177 ((re->flags & PCRE_REQCHSET) != 0)? (int)re->req_char : -1; 178 break; 179 180 case PCRE_INFO_REQUIREDCHAR: 181 *((pcre_uint32 *)where) = 182 ((re->flags & PCRE_REQCHSET) != 0) ? re->req_char : 0; 183 break; 184 185 case PCRE_INFO_REQUIREDCHARFLAGS: 186 *((int *)where) = 187 ((re->flags & PCRE_REQCHSET) != 0); 188 break; 189 190 case PCRE_INFO_NAMEENTRYSIZE: 191 *((int *)where) = re->name_entry_size; 192 break; 193 194 case PCRE_INFO_NAMECOUNT: 195 *((int *)where) = re->name_count; 196 break; 197 198 case PCRE_INFO_NAMETABLE: 199 *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset; 200 break; 201 202 case PCRE_INFO_DEFAULT_TABLES: 203 *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables)); 204 break; 205 206 /* From release 8.00 this will always return TRUE because NOPARTIAL is 207 no longer ever set (the restrictions have been removed). */ 208 209 case PCRE_INFO_OKPARTIAL: 210 *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0; 211 break; 212 213 case PCRE_INFO_JCHANGED: 214 *((int *)where) = (re->flags & PCRE_JCHANGED) != 0; 215 break; 216 217 case PCRE_INFO_HASCRORLF: 218 *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0; 219 break; 220 221 case PCRE_INFO_MAXLOOKBEHIND: 222 *((int *)where) = re->max_lookbehind; 223 break; 224 225 case PCRE_INFO_MATCHLIMIT: 226 if ((re->flags & PCRE_MLSET) == 0) return PCRE_ERROR_UNSET; 227 *((pcre_uint32 *)where) = re->limit_match; 228 break; 229 230 case PCRE_INFO_RECURSIONLIMIT: 231 if ((re->flags & PCRE_RLSET) == 0) return PCRE_ERROR_UNSET; 232 *((pcre_uint32 *)where) = re->limit_recursion; 233 break; 234 235 case PCRE_INFO_MATCH_EMPTY: 236 *((int *)where) = (re->flags & PCRE_MATCH_EMPTY) != 0; 237 break; 238 239 default: return PCRE_ERROR_BADOPTION; 240 } 241 242 return 0; 243 } 244 245 /* End of pcre_fullinfo.c */ 246
