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/vendor/pcre/dftables.c

http://github.com/feyeleanor/RubyGoLightly
C | 199 lines | 126 code | 26 blank | 47 comment | 44 complexity | 7f90230ef5e68c07ca4631ceacd0ac29 MD5 | raw file
  1/*************************************************
  2*      Perl-Compatible Regular Expressions       *
  3*************************************************/
  4
  5/* PCRE is a library of functions to support regular expressions whose syntax
  6and semantics are as close as possible to those of the Perl 5 language.
  7
  8                       Written by Philip Hazel
  9           Copyright (c) 1997-2008 University of Cambridge
 10
 11-----------------------------------------------------------------------------
 12Redistribution and use in source and binary forms, with or without
 13modification, 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
 26THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 27AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 28IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 29ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 30LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 31CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 32SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 33INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 34CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 35ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 36POSSIBILITY OF SUCH DAMAGE.
 37-----------------------------------------------------------------------------
 38*/
 39
 40
 41/* This is a freestanding support program to generate a file containing
 42character tables for PCRE. The tables are built according to the current
 43locale. Now that pcre_maketables is a function visible to the outside world, we
 44make 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
 61int main(int argc, char **argv)
 62{
 63FILE *f;
 64int i = 1;
 65const unsigned char *tables;
 66const unsigned char *base_of_tables;
 67
 68/* By default, the default C locale is used rather than what the building user
 69happens to have set. However, if the -L option is given, set the locale from
 70the LC_xxx environment variables. */
 71
 72if (argc > 1 && strcmp(argv[1], "-L") == 0)
 73  {
 74  setlocale(LC_ALL, "");        /* Set from environment variables */
 75  i++;
 76  }
 77
 78if (argc < i + 1)
 79  {
 80  fprintf(stderr, "dftables: one filename argument is required\n");
 81  return 1;
 82  }
 83
 84tables = pcre_maketables();
 85base_of_tables = tables;
 86
 87f = fopen(argv[i], "wb");
 88if (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
 95complains about the very long string otherwise. */
 96
 97fprintf(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");
105fprintf(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  "#ifdef HAVE_CONFIG_H\n"
113  "#include \"config.h\"\n"
114  "#endif\n\n"
115  "#include \"pcre_internal.h\"\n\n");
116fprintf(f,
117  "const unsigned char _pcre_default_tables[] = {\n\n"
118  "/* This table is a lower casing table. */\n\n");
119
120fprintf(f, "  ");
121for (i = 0; i < 256; i++)
122  {
123  if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
124  fprintf(f, "%3d", *tables++);
125  if (i != 255) fprintf(f, ",");
126  }
127fprintf(f, ",\n\n");
128
129fprintf(f, "/* This table is a case flipping table. */\n\n");
130
131fprintf(f, "  ");
132for (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  }
138fprintf(f, ",\n\n");
139
140fprintf(f,
141  "/* This table contains bit maps for various character classes.\n"
142  "Each map is 32 bytes long and the bits run from the least\n"
143  "significant end of each byte. The classes that have their own\n"
144  "maps are: space, xdigit, digit, upper, lower, word, graph\n"
145  "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
146
147fprintf(f, "  ");
148for (i = 0; i < cbit_length; i++)
149  {
150  if ((i & 7) == 0 && i != 0)
151    {
152    if ((i & 31) == 0) fprintf(f, "\n");
153    fprintf(f, "\n  ");
154    }
155  fprintf(f, "0x%02x", *tables++);
156  if (i != cbit_length - 1) fprintf(f, ",");
157  }
158fprintf(f, ",\n\n");
159
160fprintf(f,
161  "/* This table identifies various classes of character by individual bits:\n"
162  "  0x%02x   white space character\n"
163  "  0x%02x   letter\n"
164  "  0x%02x   decimal digit\n"
165  "  0x%02x   hexadecimal digit\n"
166  "  0x%02x   alphanumeric or '_'\n"
167  "  0x%02x   regular expression metacharacter or binary zero\n*/\n\n",
168  ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
169  ctype_meta);
170
171fprintf(f, "  ");
172for (i = 0; i < 256; i++)
173  {
174  if ((i & 7) == 0 && i != 0)
175    {
176    fprintf(f, " /* ");
177    if (isprint(i-8)) fprintf(f, " %c -", i-8);
178      else fprintf(f, "%3d-", i-8);
179    if (isprint(i-1)) fprintf(f, " %c ", i-1);
180      else fprintf(f, "%3d", i-1);
181    fprintf(f, " */\n  ");
182    }
183  fprintf(f, "0x%02x", *tables++);
184  if (i != 255) fprintf(f, ",");
185  }
186
187fprintf(f, "};/* ");
188if (isprint(i-8)) fprintf(f, " %c -", i-8);
189  else fprintf(f, "%3d-", i-8);
190if (isprint(i-1)) fprintf(f, " %c ", i-1);
191  else fprintf(f, "%3d", i-1);
192fprintf(f, " */\n\n/* End of pcre_chartables.c */\n");
193
194fclose(f);
195free((void *)base_of_tables);
196return 0;
197}
198
199/* End of dftables.c */