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php5  5.3.10
Defines | Functions
dftables.c File Reference
#include "config.h"
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include <locale.h>
#include "pcre_internal.h"
#include "pcre_maketables.c"

Go to the source code of this file.

Defines

#define DFTABLES   /* pcre_maketables.c notices this */

Functions

int main (int argc, char **argv)

Define Documentation

#define DFTABLES   /* pcre_maketables.c notices this */

Definition at line 55 of file dftables.c.


Function Documentation

int main ( int  argc,
char **  argv 
)

Definition at line 59 of file dftables.c.

{
FILE *f;
int i = 1;
const unsigned char *tables;
const unsigned char *base_of_tables;

/* By default, the default C locale is used rather than what the building user
happens to have set. However, if the -L option is given, set the locale from
the LC_xxx environment variables. */

if (argc > 1 && strcmp(argv[1], "-L") == 0)
  {
  setlocale(LC_ALL, "");        /* Set from environment variables */
  i++;
  }

if (argc < i + 1)
  {
  fprintf(stderr, "dftables: one filename argument is required\n");
  return 1;
  }

tables = pcre_maketables();
base_of_tables = tables;

f = fopen(argv[i], "wb");
if (f == NULL)
  {
  fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
  return 1;
  }

/* There are several fprintf() calls here, because gcc in pedantic mode
complains about the very long string otherwise. */

fprintf(f,
  "/*************************************************\n"
  "*      Perl-Compatible Regular Expressions       *\n"
  "*************************************************/\n\n"
  "/* This file was automatically written by the dftables auxiliary\n"
  "program. It contains character tables that are used when no external\n"
  "tables are passed to PCRE by the application that calls it. The tables\n"
  "are used only for characters whose code values are less than 256.\n\n");
fprintf(f,
  "The following #includes are present because without them gcc 4.x may remove\n"
  "the array definition from the final binary if PCRE is built into a static\n"
  "library and dead code stripping is activated. This leads to link errors.\n"
  "Pulling in the header ensures that the array gets flagged as \"someone\n"
  "outside this compilation unit might reference this\" and so it will always\n"
  "be supplied to the linker. */\n\n"
  "#ifdef HAVE_CONFIG_H\n"
  "#include \"config.h\"\n"
  "#endif\n\n"
  "#include \"pcre_internal.h\"\n\n");
fprintf(f,
  "const unsigned char _pcre_default_tables[] = {\n\n"
  "/* This table is a lower casing table. */\n\n");

fprintf(f, "  ");
for (i = 0; i < 256; i++)
  {
  if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
  fprintf(f, "%3d", *tables++);
  if (i != 255) fprintf(f, ",");
  }
fprintf(f, ",\n\n");

fprintf(f, "/* This table is a case flipping table. */\n\n");

fprintf(f, "  ");
for (i = 0; i < 256; i++)
  {
  if ((i & 7) == 0 && i != 0) fprintf(f, "\n  ");
  fprintf(f, "%3d", *tables++);
  if (i != 255) fprintf(f, ",");
  }
fprintf(f, ",\n\n");

fprintf(f,
  "/* This table contains bit maps for various character classes.\n"
  "Each map is 32 bytes long and the bits run from the least\n"
  "significant end of each byte. The classes that have their own\n"
  "maps are: space, xdigit, digit, upper, lower, word, graph\n"
  "print, punct, and cntrl. Other classes are built from combinations. */\n\n");

fprintf(f, "  ");
for (i = 0; i < cbit_length; i++)
  {
  if ((i & 7) == 0 && i != 0)
    {
    if ((i & 31) == 0) fprintf(f, "\n");
    fprintf(f, "\n  ");
    }
  fprintf(f, "0x%02x", *tables++);
  if (i != cbit_length - 1) fprintf(f, ",");
  }
fprintf(f, ",\n\n");

fprintf(f,
  "/* This table identifies various classes of character by individual bits:\n"
  "  0x%02x   white space character\n"
  "  0x%02x   letter\n"
  "  0x%02x   decimal digit\n"
  "  0x%02x   hexadecimal digit\n"
  "  0x%02x   alphanumeric or '_'\n"
  "  0x%02x   regular expression metacharacter or binary zero\n*/\n\n",
  ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
  ctype_meta);

fprintf(f, "  ");
for (i = 0; i < 256; i++)
  {
  if ((i & 7) == 0 && i != 0)
    {
    fprintf(f, " /* ");
    if (isprint(i-8)) fprintf(f, " %c -", i-8);
      else fprintf(f, "%3d-", i-8);
    if (isprint(i-1)) fprintf(f, " %c ", i-1);
      else fprintf(f, "%3d", i-1);
    fprintf(f, " */\n  ");
    }
  fprintf(f, "0x%02x", *tables++);
  if (i != 255) fprintf(f, ",");
  }

fprintf(f, "};/* ");
if (isprint(i-8)) fprintf(f, " %c -", i-8);
  else fprintf(f, "%3d-", i-8);
if (isprint(i-1)) fprintf(f, " %c ", i-1);
  else fprintf(f, "%3d", i-1);
fprintf(f, " */\n\n/* End of pcre_chartables.c */\n");

fclose(f);
free((void *)base_of_tables);
return 0;
}