"Fossies" - the Fresh Open Source Software Archive

Member "tin-2.6.2/pcre/pcre_info.c" (23 Aug 2021, 3845 Bytes) of package /linux/misc/tin-2.6.2.tar.xz:

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