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Member "tin-2.4.1/pcre/dftables.c" (28 Aug 2013, 6369 Bytes) of package /linux/misc/tin-2.4.1.tar.gz:


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    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
    9            Copyright (c) 1997-2006 University of Cambridge
   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 is a freestanding support program to generate a file containing default
   42 character tables for PCRE. The tables are built according to the default C
   43 locale. Now that pcre_maketables is a function visible to the outside world, we
   44 make use of its code from here in order to be consistent. */
   45 
   46 #include <ctype.h>
   47 #include <stdio.h>
   48 #include <string.h>
   49 
   50 #include "pcre_internal.h"
   51 
   52 #define DFTABLES          /* pcre_maketables.c notices this */
   53 #include "pcre_maketables.c"
   54 
   55 
   56 int main(int argc, char **argv)
   57 {
   58 int i;
   59 FILE *f;
   60 const unsigned char *tables = pcre_maketables();
   61 const unsigned char *base_of_tables = tables;
   62 
   63 if (argc != 2)
   64   {
   65   fprintf(stderr, "dftables: one filename argument is required\n");
   66   return 1;
   67   }
   68 
   69 f = fopen(argv[1], "wb");
   70 if (f == NULL)
   71   {
   72   fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
   73   return 1;
   74   }
   75 
   76 /* There are two fprintf() calls here, because gcc in pedantic mode complains
   77 about the very long string otherwise. */
   78 
   79 fprintf(f,
   80   "/*************************************************\n"
   81   "*      Perl-Compatible Regular Expressions       *\n"
   82   "*************************************************/\n\n"
   83   "/* This file is automatically written by the dftables auxiliary \n"
   84   "program. If you edit it by hand, you might like to edit the Makefile to \n"
   85   "prevent its ever being regenerated.\n\n");
   86 fprintf(f,
   87   "This file contains the default tables for characters with codes less than\n"
   88   "128 (ASCII characters). These tables are used when no external tables are\n"
   89   "passed to PCRE.\n\n");
   90 fprintf(f,
   91   "The following #include is present because without it gcc 4.x may remove\n"
   92   "the array definition from the final binary if PCRE is built into a static\n"
   93   "library and dead code stripping is activated. This leads to link errors.\n"
   94   "Pulling in the header ensures that the array gets flagged as \"someone\n"
   95   "outside this compilation unit might reference this\" and so it will always\n"
   96   "be supplied to the linker. */\n\n"
   97   "#include \"pcre_internal.h\"\n\n");
   98 fprintf(f,
   99   "const unsigned char _pcre_default_tables[] = {\n\n"
  100   "/* This table is a lower casing table. */\n\n");
  101 
  102 fprintf(f, "  ");
  103 for (i = 0; i < 256; i++)
  104   {
  105   if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
  106   fprintf(f, "%3d", *tables++);
  107   if (i != 255) fprintf(f, ",");
  108   }
  109 fprintf(f, ",\n\n");
  110 
  111 fprintf(f, "/* This table is a case flipping table. */\n\n");
  112 
  113 fprintf(f, "  ");
  114 for (i = 0; i < 256; i++)
  115   {
  116   if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
  117   fprintf(f, "%3d", *tables++);
  118   if (i != 255) fprintf(f, ",");
  119   }
  120 fprintf(f, ",\n\n");
  121 
  122 fprintf(f,
  123   "/* This table contains bit maps for various character classes.\n"
  124   "Each map is 32 bytes long and the bits run from the least\n"
  125   "significant end of each byte. The classes that have their own\n"
  126   "maps are: space, xdigit, digit, upper, lower, word, graph\n"
  127   "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
  128 
  129 fprintf(f, "  ");
  130 for (i = 0; i < cbit_length; i++)
  131   {
  132   if ((i & 7) == 0 && i != 0)
  133     {
  134     if ((i & 31) == 0) fprintf(f, "\n");
  135     fprintf(f, "\n  ");
  136     }
  137   fprintf(f, "0x%02x", *tables++);
  138   if (i != cbit_length - 1) fprintf(f, ",");
  139   }
  140 fprintf(f, ",\n\n");
  141 
  142 fprintf(f,
  143   "/* This table identifies various classes of character by individual bits:\n"
  144   "  0x%02x   white space character\n"
  145   "  0x%02x   letter\n"
  146   "  0x%02x   decimal digit\n"
  147   "  0x%02x   hexadecimal digit\n"
  148   "  0x%02x   alphanumeric or '_'\n"
  149   "  0x%02x   regular expression metacharacter or binary zero\n*/\n\n",
  150   ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
  151   ctype_meta);
  152 
  153 fprintf(f, "  ");
  154 for (i = 0; i < 256; i++)
  155   {
  156   if ((i & 7) == 0 && i != 0)
  157     {
  158     fprintf(f, " /* ");
  159     if (isprint(i-8)) fprintf(f, " %c -", i-8);
  160       else fprintf(f, "%3d-", i-8);
  161     if (isprint(i-1)) fprintf(f, " %c ", i-1);
  162       else fprintf(f, "%3d", i-1);
  163     fprintf(f, " */\n  ");
  164     }
  165   fprintf(f, "0x%02x", *tables++);
  166   if (i != 255) fprintf(f, ",");
  167   }
  168 
  169 fprintf(f, "};/* ");
  170 if (isprint(i-8)) fprintf(f, " %c -", i-8);
  171   else fprintf(f, "%3d-", i-8);
  172 if (isprint(i-1)) fprintf(f, " %c ", i-1);
  173   else fprintf(f, "%3d", i-1);
  174 fprintf(f, " */\n\n/* End of chartables.c */\n");
  175 
  176 fclose(f);
  177 free((void *)base_of_tables);
  178 return 0;
  179 }
  180 
  181 /* End of dftables.c */