166 lines
5.2 KiB
C
166 lines
5.2 KiB
C
/*************************************************
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* Perl-Compatible Regular Expressions *
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*************************************************/
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/* PCRE is a library of functions to support regular expressions whose syntax
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and semantics are as close as possible to those of the Perl 5 language.
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Written by Philip Hazel
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Copyright (c) 1997-2009 University of Cambridge
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-----------------------------------------------------------------------------
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the University of Cambridge nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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-----------------------------------------------------------------------------
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*/
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/* This module contains the external function pcre_fullinfo(), which returns
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information about a compiled pattern. */
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "pcre_internal.h"
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/*************************************************
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* Return info about compiled pattern *
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*************************************************/
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/* This is a newer "info" function which has an extensible interface so
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that additional items can be added compatibly.
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Arguments:
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argument_re points to compiled code
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extra_data points extra data, or NULL
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what what information is required
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where where to put the information
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Returns: 0 if data returned, negative on error
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*/
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PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
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pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
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void *where)
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{
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real_pcre internal_re;
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pcre_study_data internal_study;
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const real_pcre *re = (const real_pcre *)argument_re;
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const pcre_study_data *study = NULL;
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if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
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if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
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study = (const pcre_study_data *)extra_data->study_data;
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if (re->magic_number != MAGIC_NUMBER)
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{
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re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
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if (re == NULL) return PCRE_ERROR_BADMAGIC;
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if (study != NULL) study = &internal_study;
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}
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switch (what)
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{
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case PCRE_INFO_OPTIONS:
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*((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
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break;
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case PCRE_INFO_SIZE:
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*((size_t *)where) = re->size;
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break;
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case PCRE_INFO_STUDYSIZE:
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*((size_t *)where) = (study == NULL)? 0 : study->size;
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break;
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case PCRE_INFO_CAPTURECOUNT:
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*((int *)where) = re->top_bracket;
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break;
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case PCRE_INFO_BACKREFMAX:
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*((int *)where) = re->top_backref;
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break;
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case PCRE_INFO_FIRSTBYTE:
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*((int *)where) =
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((re->flags & PCRE_FIRSTSET) != 0)? re->first_byte :
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((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
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break;
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/* Make sure we pass back the pointer to the bit vector in the external
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block, not the internal copy (with flipped integer fields). */
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case PCRE_INFO_FIRSTTABLE:
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*((const uschar **)where) =
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(study != NULL && (study->options & PCRE_STUDY_MAPPED) != 0)?
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((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
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break;
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case PCRE_INFO_LASTLITERAL:
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*((int *)where) =
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((re->flags & PCRE_REQCHSET) != 0)? re->req_byte : -1;
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break;
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case PCRE_INFO_NAMEENTRYSIZE:
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*((int *)where) = re->name_entry_size;
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break;
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case PCRE_INFO_NAMECOUNT:
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*((int *)where) = re->name_count;
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break;
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case PCRE_INFO_NAMETABLE:
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*((const uschar **)where) = (const uschar *)re + re->name_table_offset;
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break;
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case PCRE_INFO_DEFAULT_TABLES:
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*((const uschar **)where) = (const uschar *)(_pcre_default_tables);
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break;
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case PCRE_INFO_OKPARTIAL:
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*((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
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break;
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case PCRE_INFO_JCHANGED:
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*((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
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break;
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case PCRE_INFO_HASCRORLF:
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*((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
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break;
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default: return PCRE_ERROR_BADOPTION;
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}
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return 0;
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}
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/* End of pcre_fullinfo.c */
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