/*************************************************

*      Perl-Compatible Regular Expressions       *

*************************************************/

/* PCRE is a library of functions to support regular expressions whose syntax

and semantics are as close as possible to those of the Perl 5 language.

                       Written by Philip Hazel

           Copyright (c) 1997-2012 University of Cambridge

-----------------------------------------------------------------------------

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,

      this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright

      notice, this list of conditions and the following disclaimer in the

      documentation and/or other materials provided with the distribution.

    * Neither the name of the University of Cambridge nor the names of its

      contributors may be used to endorse or promote products derived from

      this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

POSSIBILITY OF SUCH DAMAGE.

-----------------------------------------------------------------------------

*/

/* This module contains the external function pcre_fullinfo(), which returns

information about a compiled pattern. */

#include "config.h"

#include "pcre_internal.h"

/*************************************************

*        Return info about compiled pattern      *

*************************************************/

/* This is a newer "info" function which has an extensible interface so

that additional items can be added compatibly.

Arguments:

  argument_re      points to compiled code

  extra_data       points extra data, or NULL

  what             what information is required

  where            where to put the information

Returns:           0 if data returned, negative on error

*/

#ifdef COMPILE_PCRE8

PCRE_EXP_DEFN int PCRE_CALL_CONVENTION

pcre_fullinfo(const pcre *argument_re, const pcre_extra *extra_data,

  int what, void *where)

#else

PCRE_EXP_DEFN int PCRE_CALL_CONVENTION

pcre16_fullinfo(const pcre16 *argument_re, const pcre16_extra *extra_data,

  int what, void *where)

#endif

{

const REAL_PCRE *re = (const REAL_PCRE *)argument_re;

const pcre_study_data *study = NULL;

if (re == NULL || where == NULL) return PCRE_ERROR_NULL;

if (extra_data != NULL && (extra_data->flags & PCRE_EXTRA_STUDY_DATA) != 0)

  study = (const pcre_study_data *)extra_data->study_data;

/* Check that the first field in the block is the magic number. If it is not,

return with PCRE_ERROR_BADMAGIC. However, if the magic number is equal to

REVERSED_MAGIC_NUMBER we return with PCRE_ERROR_BADENDIANNESS, which

means that the pattern is likely compiled with different endianness. */

if (re->magic_number != MAGIC_NUMBER)

  return re->magic_number == REVERSED_MAGIC_NUMBER?

    PCRE_ERROR_BADENDIANNESS:PCRE_ERROR_BADMAGIC;

/* Check that this pattern was compiled in the correct bit mode */

if ((re->flags & PCRE_MODE) == 0) return PCRE_ERROR_BADMODE;

switch (what)

  {

  case PCRE_INFO_OPTIONS:

  *((unsigned long int *)where) = re->options & PUBLIC_COMPILE_OPTIONS;

  break;

  case PCRE_INFO_SIZE:

  *((size_t *)where) = re->size;

  break;

  case PCRE_INFO_STUDYSIZE:

  *((size_t *)where) = (study == NULL)? 0 : study->size;

  break;

  case PCRE_INFO_JITSIZE:

#ifdef SUPPORT_JIT

  *((size_t *)where) =

      (extra_data != NULL &&

      (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&

      extra_data->executable_jit != NULL)?

    PRIV(jit_get_size)(extra_data->executable_jit) : 0;

#else

  *((size_t *)where) = 0;

#endif

  break;

  case PCRE_INFO_CAPTURECOUNT:

  *((int *)where) = re->top_bracket;

  break;

  case PCRE_INFO_BACKREFMAX:

  *((int *)where) = re->top_backref;

  break;

  case PCRE_INFO_FIRSTBYTE:

  *((int *)where) =

    ((re->flags & PCRE_FIRSTSET) != 0)? re->first_char :

    ((re->flags & PCRE_STARTLINE) != 0)? -1 : -2;

  break;

  /* Make sure we pass back the pointer to the bit vector in the external

  block, not the internal copy (with flipped integer fields). */

  case PCRE_INFO_FIRSTTABLE:

  *((const pcre_uint8 **)where) =

    (study != NULL && (study->flags & PCRE_STUDY_MAPPED) != 0)?

      ((const pcre_study_data *)extra_data->study_data)->start_bits : NULL;

  break;

  case PCRE_INFO_MINLENGTH:

  *((int *)where) =

    (study != NULL && (study->flags & PCRE_STUDY_MINLEN) != 0)?

      (int)(study->minlength) : -1;

  break;

  case PCRE_INFO_JIT:

  *((int *)where) = extra_data != NULL &&

                    (extra_data->flags & PCRE_EXTRA_EXECUTABLE_JIT) != 0 &&

                    extra_data->executable_jit != NULL;

  break;

  case PCRE_INFO_LASTLITERAL:

  *((int *)where) =

    ((re->flags & PCRE_REQCHSET) != 0)? re->req_char : -1;

  break;

  case PCRE_INFO_NAMEENTRYSIZE:

  *((int *)where) = re->name_entry_size;

  break;

  case PCRE_INFO_NAMECOUNT:

  *((int *)where) = re->name_count;

  break;

  case PCRE_INFO_NAMETABLE:

  *((const pcre_uchar **)where) = (const pcre_uchar *)re + re->name_table_offset;

  break;

  case PCRE_INFO_DEFAULT_TABLES:

  *((const pcre_uint8 **)where) = (const pcre_uint8 *)(PRIV(default_tables));

  break;

  /* From release 8.00 this will always return TRUE because NOPARTIAL is

  no longer ever set (the restrictions have been removed). */

  case PCRE_INFO_OKPARTIAL:

  *((int *)where) = (re->flags & PCRE_NOPARTIAL) == 0;

  break;

  case PCRE_INFO_JCHANGED:

  *((int *)where) = (re->flags & PCRE_JCHANGED) != 0;

  break;

  case PCRE_INFO_HASCRORLF:

  *((int *)where) = (re->flags & PCRE_HASCRORLF) != 0;

  break;

  case PCRE_INFO_MAXLOOKBEHIND:

  *((int *)where) = re->max_lookbehind;

  break;

  default: return PCRE_ERROR_BADOPTION;

  }

return 0;

}

/* End of pcre_fullinfo.c */