Tristan Matthews | 0461646 | 2013-11-14 16:09:34 -0500 | [diff] [blame] | 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 */ |