root/ext/pcre/pcrelib/dftables.c

DEFINITIONS

1. main

   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 #include "config.h"
  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 #includes are present because without them 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 
 111 /* Force config.h in z/OS */
 112 
 113 #if defined NATIVE_ZOS
 114 fprintf(f,
 115   "/* For z/OS, config.h is forced */\n"
 116   "#ifndef HAVE_CONFIG_H\n"
 117   "#define HAVE_CONFIG_H 1\n"
 118   "#endif\n\n");
 119 #endif
 120 
 121 fprintf(f,
 122   "#ifdef HAVE_CONFIG_H\n"
 123   "#include \"config.h\"\n"
 124   "#endif\n\n"
 125   "#include \"pcre_internal.h\"\n\n");
 126 
 127 fprintf(f,
 128   "const pcre_uint8 PRIV(default_tables)[] = {\n\n"
 129   "/* This table is a lower casing table. */\n\n");
 130 
 131 fprintf(f, "  ");
 132 for (i = 0; i < 256; i++)
 133   {
 134   if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
 135   fprintf(f, "%3d", *tables++);
 136   if (i != 255) fprintf(f, ",");
 137   }
 138 fprintf(f, ",\n\n");
 139 
 140 fprintf(f, "/* This table is a case flipping table. */\n\n");
 141 
 142 fprintf(f, "  ");
 143 for (i = 0; i < 256; i++)
 144   {
 145   if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
 146   fprintf(f, "%3d", *tables++);
 147   if (i != 255) fprintf(f, ",");
 148   }
 149 fprintf(f, ",\n\n");
 150 
 151 fprintf(f,
 152   "/* This table contains bit maps for various character classes.\n"
 153   "Each map is 32 bytes long and the bits run from the least\n"
 154   "significant end of each byte. The classes that have their own\n"
 155   "maps are: space, xdigit, digit, upper, lower, word, graph\n"
 156   "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
 157 
 158 fprintf(f, "  ");
 159 for (i = 0; i < cbit_length; i++)
 160   {
 161   if ((i & 7) == 0 && i != 0)
 162     {
 163     if ((i & 31) == 0) fprintf(f, "\n");
 164     fprintf(f, "\n  ");
 165     }
 166   fprintf(f, "0x%02x", *tables++);
 167   if (i != cbit_length - 1) fprintf(f, ",");
 168   }
 169 fprintf(f, ",\n\n");
 170 
 171 fprintf(f,
 172   "/* This table identifies various classes of character by individual bits:\n"
 173   "  0x%02x   white space character\n"
 174   "  0x%02x   letter\n"
 175   "  0x%02x   decimal digit\n"
 176   "  0x%02x   hexadecimal digit\n"
 177   "  0x%02x   alphanumeric or '_'\n"
 178   "  0x%02x   regular expression metacharacter or binary zero\n*/\n\n",
 179   ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
 180   ctype_meta);
 181 
 182 fprintf(f, "  ");
 183 for (i = 0; i < 256; i++)
 184   {
 185   if ((i & 7) == 0 && i != 0)
 186     {
 187     fprintf(f, " /* ");
 188     if (isprint(i-8)) fprintf(f, " %c -", i-8);
 189       else fprintf(f, "%3d-", i-8);
 190     if (isprint(i-1)) fprintf(f, " %c ", i-1);
 191       else fprintf(f, "%3d", i-1);
 192     fprintf(f, " */\n  ");
 193     }
 194   fprintf(f, "0x%02x", *tables++);
 195   if (i != 255) fprintf(f, ",");
 196   }
 197 
 198 fprintf(f, "};/* ");
 199 if (isprint(i-8)) fprintf(f, " %c -", i-8);
 200   else fprintf(f, "%3d-", i-8);
 201 if (isprint(i-1)) fprintf(f, " %c ", i-1);
 202   else fprintf(f, "%3d", i-1);
 203 fprintf(f, " */\n\n/* End of pcre_chartables.c */\n");
 204 
 205 fclose(f);
 206 free((void *)base_of_tables);
 207 return 0;
 208 }
 209 
 210 /* End of dftables.c */