pcre2/src/dftables.c

/*************************************************
*      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
     Original API code Copyright (c) 1997-2012 University of Cambridge
         New API code Copyright (c) 2014 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 is a freestanding support program to generate a file containing
character tables for PCRE2. The tables are built according to the current
locale using the pcre2_maketables() function, which is part of the PCRE2 API.
*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <locale.h>

#define PCRE2_CODE_UNIT_WIDTH 0   /* Must be set, but not relevant here */
#include "pcre2_internal.h"

#define DFTABLES     /* pcre2_maketables.c notices this */
#include "pcre2_maketables.c"

int main(int argc, char **argv)
{
FILE *f;
int i = 1;
const unsigned char *tables;
const unsigned char *base_of_tables;

/* By default, the default C locale is used rather than what the building user
happens to have set. However, if the -L option is given, set the locale from
the LC_xxx environment variables. */

if (argc > 1 && strcmp(argv[1], "-L") == 0)
  {
  setlocale(LC_ALL, "");        /* Set from environment variables */
  i++;
  }

if (argc < i + 1)
  {
  fprintf(stderr, "dftables: one filename argument is required\n");
  return 1;
  }

tables = maketables();
base_of_tables = tables;

f = fopen(argv[i], "wb");
if (f == NULL)
  {
  fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
  return 1;
  }

/* There are several fprintf() calls here, because gcc in pedantic mode
complains about the very long string otherwise. */

fprintf(f,
  "/*************************************************\n"
  "*      Perl-Compatible Regular Expressions       *\n"
  "*************************************************/\n\n"
  "/* This file was automatically written by the dftables auxiliary\n"
  "program. It contains character tables that are used when no external\n"
  "tables are passed to PCRE2 by the application that calls it. The tables\n"
  "are used only for characters whose code values are less than 256. */\n\n");

/* Force config.h in z/OS */

#if defined NATIVE_ZOS
fprintf(f,
  "/* For z/OS, config.h is forced */\n"
  "#ifndef HAVE_CONFIG_H\n"
  "#define HAVE_CONFIG_H 1\n"
  "#endif\n\n");
#endif

fprintf(f,
  "/* The following #includes are present because without them gcc 4.x may remove\n"
  "the array definition from the final binary if PCRE2 is built into a static\n"
  "library and dead code stripping is activated. This leads to link errors.\n"
  "Pulling in the header ensures that the array gets flagged as \"someone\n"
  "outside this compilation unit might reference this\" and so it will always\n"
  "be supplied to the linker. */\n\n");

fprintf(f,
  "#ifdef HAVE_CONFIG_H\n"
  "#include \"config.h\"\n"
  "#endif\n\n"
  "#include \"pcre2_internal.h\"\n\n");

fprintf(f,
  "const uint8_t PRIV(default_tables)[] = {\n\n"
  "/* This table is a lower casing table. */\n\n");

fprintf(f, "  ");
for (i = 0; i < 256; i++)
  {
  if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
  fprintf(f, "%3d", *tables++);
  if (i != 255) fprintf(f, ",");
  }
fprintf(f, ",\n\n");

fprintf(f, "/* This table is a case flipping table. */\n\n");

fprintf(f, "  ");
for (i = 0; i < 256; i++)
  {
  if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
  fprintf(f, "%3d", *tables++);
  if (i != 255) fprintf(f, ",");
  }
fprintf(f, ",\n\n");

fprintf(f,
  "/* This table contains bit maps for various character classes.\n"
  "Each map is 32 bytes long and the bits run from the least\n"
  "significant end of each byte. The classes that have their own\n"
  "maps are: space, xdigit, digit, upper, lower, word, graph\n"
  "print, punct, and cntrl. Other classes are built from combinations. */\n\n");

fprintf(f, "  ");
for (i = 0; i < cbit_length; i++)
  {
  if ((i & 7) == 0 && i != 0)
    {
    if ((i & 31) == 0) fprintf(f, "\n");
    fprintf(f, "\n  ");
    }
  fprintf(f, "0x%02x", *tables++);
  if (i != cbit_length - 1) fprintf(f, ",");
  }
fprintf(f, ",\n\n");

fprintf(f,
  "/* This table identifies various classes of character by individual bits:\n"
  "  0x%02x   white space character\n"
  "  0x%02x   letter\n"
  "  0x%02x   decimal digit\n"
  "  0x%02x   hexadecimal digit\n"
  "  0x%02x   alphanumeric or '_'\n"
  "  0x%02x   regular expression metacharacter or binary zero\n*/\n\n",
  ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
  ctype_meta);

fprintf(f, "  ");
for (i = 0; i < 256; i++)
  {
  if ((i & 7) == 0 && i != 0)
    {
    fprintf(f, " /* ");
    if (isprint(i-8)) fprintf(f, " %c -", i-8);
      else fprintf(f, "%3d-", i-8);
    if (isprint(i-1)) fprintf(f, " %c ", i-1);
      else fprintf(f, "%3d", i-1);
    fprintf(f, " */\n  ");
    }
  fprintf(f, "0x%02x", *tables++);
  if (i != 255) fprintf(f, ",");
  }

fprintf(f, "};/* ");
if (isprint(i-8)) fprintf(f, " %c -", i-8);
  else fprintf(f, "%3d-", i-8);
if (isprint(i-1)) fprintf(f, " %c ", i-1);
  else fprintf(f, "%3d", i-1);
fprintf(f, " */\n\n/* End of pcre2_chartables.c */\n");

fclose(f);
free((void *)base_of_tables);
return 0;
}

/* End of dftables.c */