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) 1997-2009 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 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION 69 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what, 70 void *where) 71 { 72 real_pcre internal_re; 73 pcre_study_data internal_study; 74 const real_pcre *re = (const real_pcre *)argument_re; 75 const pcre_study_data *study = NULL; 76 77 if (re == NULL || where == NULL) return PCRE_ERROR_NULL; 78 79 if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0) 80 study = (const pcre_study_data *)extra_data->study_data; 81 82 if (re->magic_number != MAGIC_NUMBER) 83 { 84 re = _pcre_try_flipped(re, &internal_re, study, &internal_study); 85 if (re == NULL) return PCRE_ERROR_BADMAGIC; 86 if (study != NULL) study = &internal_study; 87 } 88 89 switch (what) 90 { 91 case PCRE_INFO_OPTIONS: 92 *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS; 93 break; 94 95 case PCRE_INFO_SIZE: 96 *((size_t *)where) = re->size; 97 break; 98 99 case PCRE_INFO_STUDYSIZE: 100 *((size_t *)where) = (study == NULL)? 0 : study->size; 101 break; 102 103 case PCRE_INFO_CAPTURECOUNT: 104 *((int *)where) = re->top_bracket; 105 break; 106 107 case PCRE_INFO_BACKREFMAX: 108 *((int *)where) = re->top_backref; 109 break; 110 111 case PCRE_INFO_FIRSTBYTE: 112 *((int *)where) = 113 ((re->flags & PCRE_FIRSTSET) != 0)? re->first_byte : 114 ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2; 115 break; 116 117 /* Make sure we pass back the pointer to the bit vector in the external 118 block, not the internal copy (with flipped integer fields). */ 119 120 case PCRE_INFO_FIRSTTABLE: 121 *((const uschar **)where) = 122 (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)? 123 ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL; 124 break; 125 126 case PCRE_INFO_MINLENGTH: 127 *((int *)where) = 128 (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)? 129 study->minlength : -1; 130 break; 131 132 case PCRE_INFO_LASTLITERAL: 133 *((int *)where) = 134 ((re->flags & PCRE_REQCHSET) != 0)? re->req_byte : -1; 135 break; 136 137 case PCRE_INFO_NAMEENTRYSIZE: 138 *((int *)where) = re->name_entry_size; 139 break; 140 141 case PCRE_INFO_NAMECOUNT: 142 *((int *)where) = re->name_count; 143 break; 144 145 case PCRE_INFO_NAMETABLE: 146 *((const uschar **)where) = (const uschar *)re + re->name_table_offset; 147 break; 148 149 case PCRE_INFO_DEFAULT_TABLES: 150 *((const uschar **)where) = (const uschar *)(_pcre_default_tables); 151 break; 152 153 /* From release 8.00 this will always return TRUE because NOPARTIAL is 154 no longer ever set (the restrictions have been removed). */ 155 156 case PCRE_INFO_OKPARTIAL: 157 *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0; 158 break; 159 160 case PCRE_INFO_JCHANGED: 161 *((int *)where) = (re->flags & PCRE_JCHANGED) != 0; 162 break; 163 164 case PCRE_INFO_HASCRORLF: 165 *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0; 166 break; 167 168 default: return PCRE_ERROR_BADOPTION; 169 } 170 171 return 0; 172 } 173 174 /* End of pcre_fullinfo.c */ 175
