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_info(), which gives some 42 information about a compiled pattern. However, use of this function is now 43 deprecated, as it has been superseded by pcre_fullinfo(). */ 44 45 46 #ifdef HAVE_CONFIG_H 47 #include "config.h" 48 #endif 49 50 #include "pcre_internal.h" 51 52 53 /************************************************* 54 * (Obsolete) Return info about compiled pattern * 55 *************************************************/ 56 57 /* This is the original "info" function. It picks potentially useful data out 58 of the private structure, but its interface was too rigid. It remains for 59 backwards compatibility. The public options are passed back in an int - though 60 the re->options field has been expanded to a long int, all the public options 61 at the low end of it, and so even on 16-bit systems this will still be OK. 62 Therefore, I haven't changed the API for pcre_info(). 63 64 Arguments: 65 argument_re points to compiled code 66 optptr where to pass back the options 67 first_byte where to pass back the first character, 68 or -1 if multiline and all branches start ^, 69 or -2 otherwise 70 71 Returns: number of capturing subpatterns 72 or negative values on error 73 */ 74 75 PCRE_EXP_DEFN int PCRE_CALL_CONVENTION 76 pcre_info(const pcre *argument_re, int *optptr, int *first_byte) 77 { 78 real_pcre internal_re; 79 const real_pcre *re = (const real_pcre *)argument_re; 80 if (re == NULL) return PCRE_ERROR_NULL; 81 if (re->magic_number != MAGIC_NUMBER) 82 { 83 re = _pcre_try_flipped(re, &internal_re, NULL, NULL); 84 if (re == NULL) return PCRE_ERROR_BADMAGIC; 85 } 86 if (optptr != NULL) *optptr = (int)(re->options & PUBLIC_COMPILE_OPTIONS); 87 if (first_byte != NULL) 88 *first_byte = ((re->flags & PCRE_FIRSTSET) != 0)? re->first_byte : 89 ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2; 90 return re->top_bracket; 91 } 92 93 /* End of pcre_info.c */ 94
