src/src/pcre/dftables.c

   1 /* $Cambridge: exim/src/src/pcre/dftables.c,v 1.6 2007/06/26 11:16:54 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) 1997-2007 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
  44 character tables for PCRE. The tables are built according to the current
  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 #include <locale.h>
  52
  53 #include "pcre_internal.h"
  54
  55 #define DFTABLES          /* pcre_maketables.c notices this */
  56 #include "pcre_maketables.c"
  57
  58
  59 int main(int argc, char **argv)
  60 {
  61 FILE *f;
  62 int i = 1;
  63 const unsigned char *tables;
  64 const unsigned char *base_of_tables;
  65
  66 /* By default, the default C locale is used rather than what the building user
  67 happens to have set. However, if the -L option is given, set the locale from
  68 the LC_xxx environment variables. */
  69
  70 if (argc > 1 && strcmp(argv[1], "-L") == 0)
  71   {
  72   setlocale(LC_ALL, "");        /* Set from environment variables */
  73   i++;
  74   }
  75
  76 if (argc < i + 1)
  77   {
  78   fprintf(stderr, "dftables: one filename argument is required\n");
  79   return 1;
  80   }
  81
  82 tables = pcre_maketables();
  83 base_of_tables = tables;
  84
  85 f = fopen(argv[i], "wb");
  86 if (f == NULL)
  87   {
  88   fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
  89   return 1;
  90   }
  91
  92 /* There are several fprintf() calls here, because gcc in pedantic mode
  93 complains about the very long string otherwise. */
  94
  95 fprintf(f,
  96   "/*************************************************\n"
  97   "*      Perl-Compatible Regular Expressions       *\n"
  98   "*************************************************/\n\n"
  99   "/* This file was automatically written by the dftables auxiliary\n"
 100   "program. It contains character tables that are used when no external\n"
 101   "tables are passed to PCRE by the application that calls it. The tables\n"
 102   "are used only for characters whose code values are less than 256.\n\n");
 103 fprintf(f,
 104   "The following #include is present because without it gcc 4.x may remove\n"
 105   "the array definition from the final binary if PCRE is built into a static\n"
 106   "library and dead code stripping is activated. This leads to link errors.\n"
 107   "Pulling in the header ensures that the array gets flagged as \"someone\n"
 108   "outside this compilation unit might reference this\" and so it will always\n"
 109   "be supplied to the linker. */\n\n"
 110   "#include \"pcre_internal.h\"\n\n");
 111 fprintf(f,
 112   "const unsigned char _pcre_default_tables[] = {\n\n"
 113   "/* This table is a lower casing table. */\n\n");
 114
 115 fprintf(f, "  ");
 116 for (i = 0; i < 256; i++)
 117   {
 118   if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
 119   fprintf(f, "%3d", *tables++);
 120   if (i != 255) fprintf(f, ",");
 121   }
 122 fprintf(f, ",\n\n");
 123
 124 fprintf(f, "/* This table is a case flipping table. */\n\n");
 125
 126 fprintf(f, "  ");
 127 for (i = 0; i < 256; i++)
 128   {
 129   if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
 130   fprintf(f, "%3d", *tables++);
 131   if (i != 255) fprintf(f, ",");
 132   }
 133 fprintf(f, ",\n\n");
 134
 135 fprintf(f,
 136   "/* This table contains bit maps for various character classes.\n"
 137   "Each map is 32 bytes long and the bits run from the least\n"
 138   "significant end of each byte. The classes that have their own\n"
 139   "maps are: space, xdigit, digit, upper, lower, word, graph\n"
 140   "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
 141
 142 fprintf(f, "  ");
 143 for (i = 0; i < cbit_length; i++)
 144   {
 145   if ((i & 7) == 0 && i != 0)
 146     {
 147     if ((i & 31) == 0) fprintf(f, "\n");
 148     fprintf(f, "\n  ");
 149     }
 150   fprintf(f, "0x%02x", *tables++);
 151   if (i != cbit_length - 1) fprintf(f, ",");
 152   }
 153 fprintf(f, ",\n\n");
 154
 155 fprintf(f,
 156   "/* This table identifies various classes of character by individual bits:\n"
 157   "  0x%02x   white space character\n"
 158   "  0x%02x   letter\n"
 159   "  0x%02x   decimal digit\n"
 160   "  0x%02x   hexadecimal digit\n"
 161   "  0x%02x   alphanumeric or '_'\n"
 162   "  0x%02x   regular expression metacharacter or binary zero\n*/\n\n",
 163   ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
 164   ctype_meta);
 165
 166 fprintf(f, "  ");
 167 for (i = 0; i < 256; i++)
 168   {
 169   if ((i & 7) == 0 && i != 0)
 170     {
 171     fprintf(f, " /* ");
 172     if (isprint(i-8)) fprintf(f, " %c -", i-8);
 173       else fprintf(f, "%3d-", i-8);
 174     if (isprint(i-1)) fprintf(f, " %c ", i-1);
 175       else fprintf(f, "%3d", i-1);
 176     fprintf(f, " */\n  ");
 177     }
 178   fprintf(f, "0x%02x", *tables++);
 179   if (i != 255) fprintf(f, ",");
 180   }
 181
 182 fprintf(f, "};/* ");
 183 if (isprint(i-8)) fprintf(f, " %c -", i-8);
 184   else fprintf(f, "%3d-", i-8);
 185 if (isprint(i-1)) fprintf(f, " %c ", i-1);
 186   else fprintf(f, "%3d", i-1);
 187 fprintf(f, " */\n\n/* End of pcre_chartables.c */\n");
 188
 189 fclose(f);
 190 free((void *)base_of_tables);
 191 return 0;
 192 }
 193
 194 /* End of dftables.c */