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Annotation of embedaddon/pcre/pcre_info.c, revision 1.1.1.1

1.1       misho       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 */