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Annotation of embedaddon/php/ext/pcre/pcrelib/pcre_fullinfo.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_fullinfo(), which returns
                     42: information about a compiled pattern. */
                     43: 
                     44: 
                     45: #include "config.h"
                     46: 
                     47: #include "pcre_internal.h"
                     48: 
                     49: 
                     50: /*************************************************
                     51: *        Return info about compiled pattern      *
                     52: *************************************************/
                     53: 
                     54: /* This is a newer "info" function which has an extensible interface so
                     55: that additional items can be added compatibly.
                     56: 
                     57: Arguments:
                     58:   argument_re      points to compiled code
                     59:   extra_data       points extra data, or NULL
                     60:   what             what information is required
                     61:   where            where to put the information
                     62: 
                     63: Returns:           0 if data returned, negative on error
                     64: */
                     65: 
                     66: PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
                     67: pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data, int what,
                     68:   void *where)
                     69: {
                     70: real_pcre internal_re;
                     71: pcre_study_data internal_study;
                     72: const real_pcre *re = (const real_pcre *)argument_re;
                     73: const pcre_study_data *study = NULL;
                     74: 
                     75: if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
                     76: 
                     77: if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
                     78:   study = (const pcre_study_data *)extra_data->study_data;
                     79: 
                     80: if (re->magic_number != MAGIC_NUMBER)
                     81:   {
                     82:   re = _pcre_try_flipped(re, &internal_re, study, &internal_study);
                     83:   if (re == NULL) return PCRE_ERROR_BADMAGIC;
                     84:   if (study != NULL) study = &internal_study;
                     85:   }
                     86: 
                     87: switch (what)
                     88:   {
                     89:   case PCRE_INFO_OPTIONS:
                     90:   *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
                     91:   break;
                     92: 
                     93:   case PCRE_INFO_SIZE:
                     94:   *((size_t *)where) = re->size;
                     95:   break;
                     96: 
                     97:   case PCRE_INFO_STUDYSIZE:
                     98:   *((size_t *)where) = (study == NULL)? 0 : study->size;
                     99:   break;
                    100: 
                    101:   case PCRE_INFO_CAPTURECOUNT:
                    102:   *((int *)where) = re->top_bracket;
                    103:   break;
                    104: 
                    105:   case PCRE_INFO_BACKREFMAX:
                    106:   *((int *)where) = re->top_backref;
                    107:   break;
                    108: 
                    109:   case PCRE_INFO_FIRSTBYTE:
                    110:   *((int *)where) =
                    111:     ((re->flags & PCRE_FIRSTSET) != 0)? re->first_byte :
                    112:     ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
                    113:   break;
                    114: 
                    115:   /* Make sure we pass back the pointer to the bit vector in the external
                    116:   block, not the internal copy (with flipped integer fields). */
                    117: 
                    118:   case PCRE_INFO_FIRSTTABLE:
                    119:   *((const uschar **)where) =
                    120:     (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
                    121:       ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
                    122:   break;
                    123: 
                    124:   case PCRE_INFO_MINLENGTH:
                    125:   *((int *)where) =
                    126:     (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
                    127:       study->minlength : -1;
                    128:   break;
                    129: 
                    130:   case PCRE_INFO_LASTLITERAL:
                    131:   *((int *)where) =
                    132:     ((re->flags & PCRE_REQCHSET) != 0)? re->req_byte : -1;
                    133:   break;
                    134: 
                    135:   case PCRE_INFO_NAMEENTRYSIZE:
                    136:   *((int *)where) = re->name_entry_size;
                    137:   break;
                    138: 
                    139:   case PCRE_INFO_NAMECOUNT:
                    140:   *((int *)where) = re->name_count;
                    141:   break;
                    142: 
                    143:   case PCRE_INFO_NAMETABLE:
                    144:   *((const uschar **)where) = (const uschar *)re + re->name_table_offset;
                    145:   break;
                    146: 
                    147:   case PCRE_INFO_DEFAULT_TABLES:
                    148:   *((const uschar **)where) = (const uschar *)(_pcre_default_tables);
                    149:   break;
                    150: 
                    151:   /* From release 8.00 this will always return TRUE because NOPARTIAL is
                    152:   no longer ever set (the restrictions have been removed). */
                    153: 
                    154:   case PCRE_INFO_OKPARTIAL:
                    155:   *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
                    156:   break;
                    157: 
                    158:   case PCRE_INFO_JCHANGED:
                    159:   *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
                    160:   break;
                    161: 
                    162:   case PCRE_INFO_HASCRORLF:
                    163:   *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
                    164:   break;
                    165: 
                    166:   default: return PCRE_ERROR_BADOPTION;
                    167:   }
                    168: 
                    169: return 0;
                    170: }
                    171: 
                    172: /* End of pcre_fullinfo.c */