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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) 1997-2012 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
   42 character tables for PCRE. The tables are built according to the current
   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 #ifdef HAVE_CONFIG_H
   47 #include "config.h"
   48 #endif
   49 
   50 #include <ctype.h>
   51 #include <stdio.h>
   52 #include <string.h>
   53 #include <locale.h>
   54 
   55 #include "pcre_internal.h"
   56 
   57 #define DFTABLES          /* pcre_maketables.c notices this */
   58 #include "pcre_maketables.c"
   59 
   60 
   61 int main(int argc, char **argv)
   62 {
   63 FILE *f;
   64 int i = 1;
   65 const unsigned char *tables;
   66 const unsigned char *base_of_tables;
   67 
   68 /* By default, the default C locale is used rather than what the building user
   69 happens to have set. However, if the -L option is given, set the locale from
   70 the LC_xxx environment variables. */
   71 
   72 if (argc > 1 && strcmp(argv[1], "-L") == 0)
   73   {
   74   setlocale(LC_ALL, "");        /* Set from environment variables */
   75   i++;
   76   }
   77 
   78 if (argc < i + 1)
   79   {
   80   fprintf(stderr, "dftables: one filename argument is required\n");
   81   return 1;
   82   }
   83 
   84 tables = pcre_maketables();
   85 base_of_tables = tables;
   86 
   87 f = fopen(argv[i], "wb");
   88 if (f == NULL)
   89   {
   90   fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
   91   return 1;
   92   }
   93 
   94 /* There are several fprintf() calls here, because gcc in pedantic mode
   95 complains about the very long string otherwise. */
   96 
   97 fprintf(f,
   98   "/*************************************************\n"
   99   "*      Perl-Compatible Regular Expressions       *\n"
  100   "*************************************************/\n\n"
  101   "/* This file was automatically written by the dftables auxiliary\n"
  102   "program. It contains character tables that are used when no external\n"
  103   "tables are passed to PCRE by the application that calls it. The tables\n"
  104   "are used only for characters whose code values are less than 256.\n\n");
  105 fprintf(f,
  106   "The following #includes are present because without them gcc 4.x may remove\n"
  107   "the array definition from the final binary if PCRE is built into a static\n"
  108   "library and dead code stripping is activated. This leads to link errors.\n"
  109   "Pulling in the header ensures that the array gets flagged as \"someone\n"
  110   "outside this compilation unit might reference this\" and so it will always\n"
  111   "be supplied to the linker. */\n\n");
  112 
  113 /* Force config.h in z/OS */
  114 
  115 #if defined NATIVE_ZOS
  116 fprintf(f,
  117   "/* For z/OS, config.h is forced */\n"
  118   "#ifndef HAVE_CONFIG_H\n"
  119   "#define HAVE_CONFIG_H 1\n"
  120   "#endif\n\n");
  121 #endif
  122 
  123 fprintf(f,
  124   "#ifdef HAVE_CONFIG_H\n"
  125   "#include \"config.h\"\n"
  126   "#endif\n\n"
  127   "#include \"pcre_internal.h\"\n\n");
  128 
  129 fprintf(f,
  130   "const pcre_uint8 PRIV(default_tables)[] = {\n\n"
  131   "/* This table is a lower casing table. */\n\n");
  132 
  133 fprintf(f, "  ");
  134 for (i = 0; i < 256; i++)
  135   {
  136   if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
  137   fprintf(f, "%3d", *tables++);
  138   if (i != 255) fprintf(f, ",");
  139   }
  140 fprintf(f, ",\n\n");
  141 
  142 fprintf(f, "/* This table is a case flipping table. */\n\n");
  143 
  144 fprintf(f, "  ");
  145 for (i = 0; i < 256; i++)
  146   {
  147   if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
  148   fprintf(f, "%3d", *tables++);
  149   if (i != 255) fprintf(f, ",");
  150   }
  151 fprintf(f, ",\n\n");
  152 
  153 fprintf(f,
  154   "/* This table contains bit maps for various character classes.\n"
  155   "Each map is 32 bytes long and the bits run from the least\n"
  156   "significant end of each byte. The classes that have their own\n"
  157   "maps are: space, xdigit, digit, upper, lower, word, graph\n"
  158   "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
  159 
  160 fprintf(f, "  ");
  161 for (i = 0; i < cbit_length; i++)
  162   {
  163   if ((i & 7) == 0 && i != 0)
  164     {
  165     if ((i & 31) == 0) fprintf(f, "\n");
  166     fprintf(f, "\n  ");
  167     }
  168   fprintf(f, "0x%02x", *tables++);
  169   if (i != cbit_length - 1) fprintf(f, ",");
  170   }
  171 fprintf(f, ",\n\n");
  172 
  173 fprintf(f,
  174   "/* This table identifies various classes of character by individual bits:\n"
  175   "  0x%02x   white space character\n"
  176   "  0x%02x   letter\n"
  177   "  0x%02x   decimal digit\n"
  178   "  0x%02x   hexadecimal digit\n"
  179   "  0x%02x   alphanumeric or '_'\n"
  180   "  0x%02x   regular expression metacharacter or binary zero\n*/\n\n",
  181   ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
  182   ctype_meta);
  183 
  184 fprintf(f, "  ");
  185 for (i = 0; i < 256; i++)
  186   {
  187   if ((i & 7) == 0 && i != 0)
  188     {
  189     fprintf(f, " /* ");
  190     if (isprint(i-8)) fprintf(f, " %c -", i-8);
  191       else fprintf(f, "%3d-", i-8);
  192     if (isprint(i-1)) fprintf(f, " %c ", i-1);
  193       else fprintf(f, "%3d", i-1);
  194     fprintf(f, " */\n  ");
  195     }
  196   fprintf(f, "0x%02x", *tables++);
  197   if (i != 255) fprintf(f, ",");
  198   }
  199 
  200 fprintf(f, "};/* ");
  201 if (isprint(i-8)) fprintf(f, " %c -", i-8);
  202   else fprintf(f, "%3d-", i-8);
  203 if (isprint(i-1)) fprintf(f, " %c ", i-1);
  204   else fprintf(f, "%3d", i-1);
  205 fprintf(f, " */\n\n/* End of pcre_chartables.c */\n");
  206 
  207 fclose(f);
  208 free((void *)base_of_tables);
  209 return 0;
  210 }
  211 
  212 /* End of dftables.c */