Annotation of embedaddon/pcre/pcre_fullinfo.c, revision 1.1.1.5

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
1.1.1.4   misho       9:            Copyright (c) 1997-2013 University of Cambridge
1.1       misho      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: #ifdef HAVE_CONFIG_H
                     46: #include "config.h"
                     47: #endif
                     48: 
                     49: #include "pcre_internal.h"
                     50: 
                     51: 
                     52: /*************************************************
                     53: *        Return info about compiled pattern      *
                     54: *************************************************/
                     55: 
                     56: /* This is a newer "info" function which has an extensible interface so
                     57: that additional items can be added compatibly.
                     58: 
                     59: Arguments:
                     60:   argument_re      points to compiled code
                     61:   extra_data       points extra data, or NULL
                     62:   what             what information is required
                     63:   where            where to put the information
                     64: 
                     65: Returns:           0 if data returned, negative on error
                     66: */
                     67: 
1.1.1.4   misho      68: #if defined COMPILE_PCRE8
1.1       misho      69: PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
1.1.1.2   misho      70: pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data,
                     71:   int what, void *where)
1.1.1.4   misho      72: #elif defined COMPILE_PCRE16
1.1.1.2   misho      73: PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
                     74: pcre16_fullinfo(const pcre16 *argument_re, const pcre16_extra *extra_data,
                     75:   int what, void *where)
1.1.1.4   misho      76: #elif defined COMPILE_PCRE32
                     77: PCRE_EXP_DEFN int PCRE_CALL_CONVENTION
                     78: pcre32_fullinfo(const pcre32 *argument_re, const pcre32_extra *extra_data,
                     79:   int what, void *where)
1.1.1.2   misho      80: #endif
1.1       misho      81: {
1.1.1.2   misho      82: const REAL_PCRE *re = (const REAL_PCRE *)argument_re;
1.1       misho      83: const pcre_study_data *study = NULL;
                     84: 
                     85: if (re == NULL || where == NULL) return PCRE_ERROR_NULL;
                     86: 
                     87: if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)
                     88:   study = (const pcre_study_data *)extra_data->study_data;
                     89: 
1.1.1.2   misho      90: /* Check that the first field in the block is the magic number. If it is not,
                     91: return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to
                     92: REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which
                     93: means that the pattern is likely compiled with different endianness. */
                     94: 
1.1       misho      95: if (re->magic_number != MAGIC_NUMBER)
1.1.1.2   misho      96:   return re->magic_number == REVERSED_MAGIC_NUMBER?
                     97:     PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;
                     98: 
                     99: /* Check that this pattern was compiled in the correct bit mode */
                    100: 
                    101: if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;
1.1       misho     102: 
                    103: switch (what)
                    104:   {
                    105:   case PCRE_INFO_OPTIONS:
                    106:   *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;
                    107:   break;
                    108: 
                    109:   case PCRE_INFO_SIZE:
                    110:   *((size_t *)where) = re->size;
                    111:   break;
                    112: 
                    113:   case PCRE_INFO_STUDYSIZE:
                    114:   *((size_t *)where) = (study == NULL)? 0 : study->size;
                    115:   break;
                    116: 
                    117:   case PCRE_INFO_JITSIZE:
                    118: #ifdef SUPPORT_JIT
                    119:   *((size_t *)where) =
                    120:       (extra_data != NULL &&
                    121:       (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
                    122:       extra_data->executable_jit != NULL)?
1.1.1.2   misho     123:     PRIV(jit_get_size)(extra_data->executable_jit) : 0;
1.1       misho     124: #else
                    125:   *((size_t *)where) = 0;
                    126: #endif
                    127:   break;
                    128: 
                    129:   case PCRE_INFO_CAPTURECOUNT:
                    130:   *((int *)where) = re->top_bracket;
                    131:   break;
                    132: 
                    133:   case PCRE_INFO_BACKREFMAX:
                    134:   *((int *)where) = re->top_backref;
                    135:   break;
                    136: 
                    137:   case PCRE_INFO_FIRSTBYTE:
                    138:   *((int *)where) =
1.1.1.4   misho     139:     ((re->flags & PCRE_FIRSTSET) != 0)? (int)re->first_char :
1.1       misho     140:     ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;
                    141:   break;
                    142: 
1.1.1.4   misho     143:   case PCRE_INFO_FIRSTCHARACTER:
                    144:     *((pcre_uint32 *)where) =
                    145:       (re->flags & PCRE_FIRSTSET) != 0 ? re->first_char : 0;
                    146:     break;
                    147: 
                    148:   case PCRE_INFO_FIRSTCHARACTERFLAGS:
                    149:     *((int *)where) =
                    150:       ((re->flags & PCRE_FIRSTSET) != 0) ? 1 :
                    151:       ((re->flags & PCRE_STARTLINE) != 0) ? 2 : 0;
                    152:     break;
                    153: 
1.1       misho     154:   /* Make sure we pass back the pointer to the bit vector in the external
                    155:   block, not the internal copy (with flipped integer fields). */
                    156: 
                    157:   case PCRE_INFO_FIRSTTABLE:
1.1.1.2   misho     158:   *((const pcre_uint8 **)where) =
1.1       misho     159:     (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?
                    160:       ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;
                    161:   break;
                    162: 
                    163:   case PCRE_INFO_MINLENGTH:
                    164:   *((int *)where) =
                    165:     (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?
1.1.1.2   misho     166:       (int)(study->minlength) : -1;
1.1       misho     167:   break;
                    168: 
                    169:   case PCRE_INFO_JIT:
                    170:   *((int *)where) = extra_data != NULL &&
                    171:                     (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&
                    172:                     extra_data->executable_jit != NULL;
                    173:   break;
                    174: 
                    175:   case PCRE_INFO_LASTLITERAL:
                    176:   *((int *)where) =
1.1.1.4   misho     177:     ((re->flags & PCRE_REQCHSET) != 0)? (int)re->req_char : -1;
1.1       misho     178:   break;
                    179: 
1.1.1.4   misho     180:   case PCRE_INFO_REQUIREDCHAR:
                    181:     *((pcre_uint32 *)where) =
                    182:       ((re->flags & PCRE_REQCHSET) != 0) ? re->req_char : 0;
                    183:     break;
                    184: 
                    185:   case PCRE_INFO_REQUIREDCHARFLAGS:
                    186:     *((int *)where) =
                    187:       ((re->flags & PCRE_REQCHSET) != 0);
                    188:     break;
                    189: 
1.1       misho     190:   case PCRE_INFO_NAMEENTRYSIZE:
                    191:   *((int *)where) = re->name_entry_size;
                    192:   break;
                    193: 
                    194:   case PCRE_INFO_NAMECOUNT:
                    195:   *((int *)where) = re->name_count;
                    196:   break;
                    197: 
                    198:   case PCRE_INFO_NAMETABLE:
1.1.1.2   misho     199:   *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;
1.1       misho     200:   break;
                    201: 
                    202:   case PCRE_INFO_DEFAULT_TABLES:
1.1.1.2   misho     203:   *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));
1.1       misho     204:   break;
                    205: 
                    206:   /* From release 8.00 this will always return TRUE because NOPARTIAL is
                    207:   no longer ever set (the restrictions have been removed). */
                    208: 
                    209:   case PCRE_INFO_OKPARTIAL:
                    210:   *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;
                    211:   break;
                    212: 
                    213:   case PCRE_INFO_JCHANGED:
                    214:   *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;
                    215:   break;
                    216: 
                    217:   case PCRE_INFO_HASCRORLF:
                    218:   *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;
                    219:   break;
                    220: 
1.1.1.3   misho     221:   case PCRE_INFO_MAXLOOKBEHIND:
                    222:   *((int *)where) = re->max_lookbehind;
                    223:   break;
                    224: 
1.1.1.4   misho     225:   case PCRE_INFO_MATCHLIMIT:
                    226:   if ((re->flags & PCRE_MLSET) == 0) return PCRE_ERROR_UNSET;
                    227:   *((pcre_uint32 *)where) = re->limit_match;
                    228:   break;
                    229: 
                    230:   case PCRE_INFO_RECURSIONLIMIT:
                    231:   if ((re->flags & PCRE_RLSET) == 0) return PCRE_ERROR_UNSET;
                    232:   *((pcre_uint32 *)where) = re->limit_recursion;
                    233:   break;
                    234: 
1.1.1.5 ! misho     235:   case PCRE_INFO_MATCH_EMPTY:
        !           236:   *((int *)where) = (re->flags & PCRE_MATCH_EMPTY) != 0;
        !           237:   break;
        !           238: 
1.1       misho     239:   default: return PCRE_ERROR_BADOPTION;
                    240:   }
                    241: 
                    242: return 0;
                    243: }
                    244: 
                    245: /* End of pcre_fullinfo.c */

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>