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Member "tin-2.4.1/pcre/pcre_fullinfo.c" (28 Aug 2013, 4933 Bytes) of package /linux/misc/tin-2.4.1.tar.gz:


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    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) 1997-2006 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 #include "pcre_internal.h"
   46 
   47 
   48 /*************************************************
   49 *        Return info about compiled pattern      *
   50 *************************************************/
   51 
   52 /* This is a newer "info" function which has an extensible interface so
   53 that additional items can be added compatibly.
   54 
   55 Arguments:
   56   argument_re      points to compiled code
   57   extra_data       points extra data, or NULL
   58   what             what information is required
   59   where            where to put the information
   60 
   61 Returns:           0 if data returned, negative on error
   62 */
   63 
   64 PCRE_DATA_SCOPE int
   65 pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
   66   void *where)
   67 {
   68 real_pcre internal_re;
   69 pcre_study_data internal_study;
   70 const real_pcre *re = (const real_pcre *)argument_re;
   71 const pcre_study_data *study = NULL;
   72 
   73 if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
   74 
   75 if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
   76   study = (const pcre_study_data *)extra_data->study_data;
   77 
   78 if (re->magic_number != MAGIC_NUMBER)
   79   {
   80   re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
   81   if (re == NULL) return PCRE_ERROR_BADMAGIC;
   82   if (study != NULL) study = &internal_study;
   83   }
   84 
   85 switch (what)
   86   {
   87   case PCRE_INFO_OPTIONS:
   88   *((unsigned long int *)where) = re->options & PUBLIC_OPTIONS;
   89   break;
   90 
   91   case PCRE_INFO_SIZE:
   92   *((size_t *)where) = re->size;
   93   break;
   94 
   95   case PCRE_INFO_STUDYSIZE:
   96   *((size_t *)where) = (study == NULL)? 0 : study->size;
   97   break;
   98 
   99   case PCRE_INFO_CAPTURECOUNT:
  100   *((int *)where) = re->top_bracket;
  101   break;
  102 
  103   case PCRE_INFO_BACKREFMAX:
  104   *((int *)where) = re->top_backref;
  105   break;
  106 
  107   case PCRE_INFO_FIRSTBYTE:
  108   *((int *)where) =
  109     ((re->options & PCRE_FIRSTSET) != 0)? re->first_byte :
  110     ((re->options & PCRE_STARTLINE) != 0)? -1 : -2;
  111   break;
  112 
  113   /* Make sure we pass back the pointer to the bit vector in the external
  114   block, not the internal copy (with flipped integer fields). */
  115 
  116   case PCRE_INFO_FIRSTTABLE:
  117   *((const uschar **)where) =
  118     (study != NULL && (study->options & PCRE_STUDY_MAPPED) != 0)?
  119       ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
  120   break;
  121 
  122   case PCRE_INFO_LASTLITERAL:
  123   *((int *)where) =
  124     ((re->options & PCRE_REQCHSET) != 0)? re->req_byte : -1;
  125   break;
  126 
  127   case PCRE_INFO_NAMEENTRYSIZE:
  128   *((int *)where) = re->name_entry_size;
  129   break;
  130 
  131   case PCRE_INFO_NAMECOUNT:
  132   *((int *)where) = re->name_count;
  133   break;
  134 
  135   case PCRE_INFO_NAMETABLE:
  136   *((const uschar **)where) = (const uschar *)re + re->name_table_offset;
  137   break;
  138 
  139   case PCRE_INFO_DEFAULT_TABLES:
  140   *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
  141   break;
  142 
  143   default: return PCRE_ERROR_BADOPTION;
  144   }
  145 
  146 return 0;
  147 }
  148 
  149 /* End of pcre_fullinfo.c */