+/* $Cambridge: exim/src/src/pcre/dftables.c,v 1.6 2007/06/26 11:16:54 ph10 Exp $ */
+
/*************************************************
* Perl-Compatible Regular Expressions *
*************************************************/
-/*
-PCRE is a library of functions to support regular expressions whose syntax
+/* PCRE is a library of functions to support regular expressions whose syntax
and semantics are as close as possible to those of the Perl 5 language.
-Written by: Philip Hazel <ph10@cam.ac.uk>
-
- Copyright (c) 1997-2004 University of Cambridge
+ Written by Philip Hazel
+ Copyright (c) 1997-2007 University of Cambridge
-----------------------------------------------------------------------------
Redistribution and use in source and binary forms, with or without
*/
-/* This is a support program to generate the file chartables.c, containing
-character tables of various kinds. They are built according to the default C
-locale and used as the default tables by PCRE. Now that pcre_maketables is
-a function visible to the outside world, we make use of its code from here in
-order to be consistent. */
+/* This is a freestanding support program to generate a file containing
+character tables for PCRE. The tables are built according to the current
+locale. Now that pcre_maketables is a function visible to the outside world, we
+make use of its code from here in order to be consistent. */
#include <ctype.h>
#include <stdio.h>
#include <string.h>
+#include <locale.h>
-#include "internal.h"
+#include "pcre_internal.h"
-#define DFTABLES /* maketables.c notices this */
-#include "maketables.c"
+#define DFTABLES /* pcre_maketables.c notices this */
+#include "pcre_maketables.c"
int main(int argc, char **argv)
{
-int i;
FILE *f;
-const unsigned char *tables = pcre_maketables();
+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 != 2)
+if (argc < i + 1)
{
fprintf(stderr, "dftables: one filename argument is required\n");
return 1;
}
-f = fopen(argv[1], "w");
+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 two fprintf() calls here, because gcc in pedantic mode complains
-about the very long string otherwise. */
+/* 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 is automatically written by the dftables auxiliary \n"
- "program. If you edit it by hand, you might like to edit the Makefile to \n"
- "prevent its ever being regenerated.\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 #include is present because without it 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"
+ "#include \"pcre_internal.h\"\n\n");
fprintf(f,
- "This file is #included in the compilation of pcre.c to build the default\n"
- "character tables which are used when no tables are passed to the compile\n"
- "function. */\n\n"
- "static unsigned char pcre_default_tables[] = {\n\n"
+ "const unsigned char _pcre_default_tables[] = {\n\n"
"/* This table is a lower casing table. */\n\n");
fprintf(f, " ");
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 chartables.c */\n");
+fprintf(f, " */\n\n/* End of pcre_chartables.c */\n");
fclose(f);
+free((void *)base_of_tables);
return 0;
}
git://git.exim.org / exim.git / blobdiff