src/src/pcre/dftables.c

   1 /* $Cambridge: exim/src/src/pcre/dftables.c,v 1.3 2005/08/08 10:22:14 ph10 Exp $ */
   2
   3 /*************************************************
   4 *      Perl-Compatible Regular Expressions       *
   5 *************************************************/
   6
   7 /* PCRE is a library of functions to support regular expressions whose syntax
   8 and semantics are as close as possible to those of the Perl 5 language.
   9
  10                        Written by Philip Hazel
  11            Copyright (c) 1997-2005 University of Cambridge
  12
  13 -----------------------------------------------------------------------------
  14 Redistribution and use in source and binary forms, with or without
  15 modification, are permitted provided that the following conditions are met:
  16
  17     * Redistributions of source code must retain the above copyright notice,
  18       this list of conditions and the following disclaimer.
  19
  20     * Redistributions in binary form must reproduce the above copyright
  21       notice, this list of conditions and the following disclaimer in the
  22       documentation and/or other materials provided with the distribution.
  23
  24     * Neither the name of the University of Cambridge nor the names of its
  25       contributors may be used to endorse or promote products derived from
  26       this software without specific prior written permission.
  27
  28 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  29 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  32 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  34 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  35 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  36 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  37 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  38 POSSIBILITY OF SUCH DAMAGE.
  39 -----------------------------------------------------------------------------
  40 */
  41
  42
  43 /* This is a freestanding support program to generate a file containing default
  44 character tables for PCRE. The tables are built according to the default C
  45 locale. Now that pcre_maketables is a function visible to the outside world, we
  46 make use of its code from here in order to be consistent. */
  47
  48 #include <ctype.h>
  49 #include <stdio.h>
  50 #include <string.h>
  51
  52 #include "pcre_internal.h"
  53
  54 #define DFTABLES          /* pcre_maketables.c notices this */
  55 #include "pcre_maketables.c"
  56
  57
  58 int main(int argc, char **argv)
  59 {
  60 int i;
  61 FILE *f;
  62 const unsigned char *tables = pcre_maketables();
  63 const unsigned char *base_of_tables = tables;
  64
  65 if (argc != 2)
  66   {
  67   fprintf(stderr, "dftables: one filename argument is required\n");
  68   return 1;
  69   }
  70
  71 f = fopen(argv[1], "wb");
  72 if (f == NULL)
  73   {
  74   fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
  75   return 1;
  76   }
  77
  78 /* There are two fprintf() calls here, because gcc in pedantic mode complains
  79 about the very long string otherwise. */
  80
  81 fprintf(f,
  82   "/*************************************************\n"
  83   "*      Perl-Compatible Regular Expressions       *\n"
  84   "*************************************************/\n\n"
  85   "/* This file is automatically written by the dftables auxiliary \n"
  86   "program. If you edit it by hand, you might like to edit the Makefile to \n"
  87   "prevent its ever being regenerated.\n\n");
  88 fprintf(f,
  89   "This file contains the default tables for characters with codes less than\n"
  90   "128 (ASCII characters). These tables are used when no external tables are\n"
  91   "passed to PCRE. */\n\n"
  92   "const unsigned char _pcre_default_tables[] = {\n\n"
  93   "/* This table is a lower casing table. */\n\n");
  94
  95 fprintf(f, "  ");
  96 for (i = 0; i < 256; i++)
  97   {
  98   if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
  99   fprintf(f, "%3d", *tables++);
 100   if (i != 255) fprintf(f, ",");
 101   }
 102 fprintf(f, ",\n\n");
 103
 104 fprintf(f, "/* This table is a case flipping table. */\n\n");
 105
 106 fprintf(f, "  ");
 107 for (i = 0; i < 256; i++)
 108   {
 109   if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
 110   fprintf(f, "%3d", *tables++);
 111   if (i != 255) fprintf(f, ",");
 112   }
 113 fprintf(f, ",\n\n");
 114
 115 fprintf(f,
 116   "/* This table contains bit maps for various character classes.\n"
 117   "Each map is 32 bytes long and the bits run from the least\n"
 118   "significant end of each byte. The classes that have their own\n"
 119   "maps are: space, xdigit, digit, upper, lower, word, graph\n"
 120   "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
 121
 122 fprintf(f, "  ");
 123 for (i = 0; i < cbit_length; i++)
 124   {
 125   if ((i & 7) == 0 && i != 0)
 126     {
 127     if ((i & 31) == 0) fprintf(f, "\n");
 128     fprintf(f, "\n  ");
 129     }
 130   fprintf(f, "0x%02x", *tables++);
 131   if (i != cbit_length - 1) fprintf(f, ",");
 132   }
 133 fprintf(f, ",\n\n");
 134
 135 fprintf(f,
 136   "/* This table identifies various classes of character by individual bits:\n"
 137   "  0x%02x   white space character\n"
 138   "  0x%02x   letter\n"
 139   "  0x%02x   decimal digit\n"
 140   "  0x%02x   hexadecimal digit\n"
 141   "  0x%02x   alphanumeric or '_'\n"
 142   "  0x%02x   regular expression metacharacter or binary zero\n*/\n\n",
 143   ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
 144   ctype_meta);
 145
 146 fprintf(f, "  ");
 147 for (i = 0; i < 256; i++)
 148   {
 149   if ((i & 7) == 0 && i != 0)
 150     {
 151     fprintf(f, " /* ");
 152     if (isprint(i-8)) fprintf(f, " %c -", i-8);
 153       else fprintf(f, "%3d-", i-8);
 154     if (isprint(i-1)) fprintf(f, " %c ", i-1);
 155       else fprintf(f, "%3d", i-1);
 156     fprintf(f, " */\n  ");
 157     }
 158   fprintf(f, "0x%02x", *tables++);
 159   if (i != 255) fprintf(f, ",");
 160   }
 161
 162 fprintf(f, "};/* ");
 163 if (isprint(i-8)) fprintf(f, " %c -", i-8);
 164   else fprintf(f, "%3d-", i-8);
 165 if (isprint(i-1)) fprintf(f, " %c ", i-1);
 166   else fprintf(f, "%3d", i-1);
 167 fprintf(f, " */\n\n/* End of chartables.c */\n");
 168
 169 fclose(f);
 170 free((void *)base_of_tables);
 171 return 0;
 172 }
 173
 174 /* End of dftables.c */