/[pcre]/code/tags/pcre-6.4/dftables.c
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Contents of /code/tags/pcre-6.4/dftables.c

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Revision 43 - (hide annotations) (download)
Sat Feb 24 21:39:21 2007 UTC (7 years, 5 months ago) by nigel
Original Path: code/trunk/dftables.c
File MIME type: text/plain
File size: 4637 byte(s)
Load pcre-3.0 into code/trunk.

1 nigel 27 /*************************************************
2     * Perl-Compatible Regular Expressions *
3     *************************************************/
4    
5     /*
6     PCRE is a library of functions to support regular expressions whose syntax
7     and semantics are as close as possible to those of the Perl 5 language.
8    
9     Written by: Philip Hazel <ph10@cam.ac.uk>
10    
11 nigel 43 Copyright (c) 1997-2000 University of Cambridge
12 nigel 27
13     -----------------------------------------------------------------------------
14     Permission is granted to anyone to use this software for any purpose on any
15     computer system, and to redistribute it freely, subject to the following
16     restrictions:
17    
18     1. This software is distributed in the hope that it will be useful,
19     but WITHOUT ANY WARRANTY; without even the implied warranty of
20     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
21    
22     2. The origin of this software must not be misrepresented, either by
23     explicit claim or by omission.
24    
25     3. Altered versions must be plainly marked as such, and must not be
26     misrepresented as being the original software.
27 nigel 29
28     4. If PCRE is embedded in any software that is released under the GNU
29     General Purpose Licence (GPL), then the terms of that licence shall
30     supersede any condition above with which it is incompatible.
31 nigel 27 -----------------------------------------------------------------------------
32    
33     See the file Tech.Notes for some information on the internals.
34     */
35    
36    
37     /* This is a support program to generate the file chartables.c, containing
38     character tables of various kinds. They are built according to the default C
39     locale and used as the default tables by PCRE. Now that pcre_maketables is
40     a function visible to the outside world, we make use of its code from here in
41     order to be consistent. */
42    
43     #include <ctype.h>
44     #include <stdio.h>
45     #include <string.h>
46    
47     #include "internal.h"
48    
49     #define DFTABLES /* maketables.c notices this */
50     #include "maketables.c"
51    
52    
53     int main(void)
54     {
55     int i;
56     unsigned const char *tables = pcre_maketables();
57    
58     printf(
59     "/*************************************************\n"
60     "* Perl-Compatible Regular Expressions *\n"
61     "*************************************************/\n\n"
62 nigel 35 "/* This file is automatically written by the dftables auxiliary \n"
63 nigel 27 "program. If you edit it by hand, you might like to edit the Makefile to \n"
64     "prevent its ever being regenerated.\n\n"
65     "This file is #included in the compilation of pcre.c to build the default\n"
66     "character tables which are used when no tables are passed to the compile\n"
67     "function. */\n\n"
68     "static unsigned char pcre_default_tables[] = {\n\n"
69     "/* This table is a lower casing table. */\n\n");
70    
71     printf(" ");
72     for (i = 0; i < 256; i++)
73     {
74     if ((i & 7) == 0 && i != 0) printf("\n ");
75     printf("%3d", *tables++);
76     if (i != 255) printf(",");
77     }
78     printf(",\n\n");
79    
80     printf("/* This table is a case flipping table. */\n\n");
81    
82     printf(" ");
83     for (i = 0; i < 256; i++)
84     {
85     if ((i & 7) == 0 && i != 0) printf("\n ");
86     printf("%3d", *tables++);
87     if (i != 255) printf(",");
88     }
89     printf(",\n\n");
90    
91     printf(
92 nigel 43 "/* This table contains bit maps for various character classes.\n"
93     "Each map is 32 bytes long and the bits run from the least\n"
94     "significant end of each byte. The classes that have their own\n"
95     "maps are: space, xdigit, digit, upper, lower, word, graph\n"
96     "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
97 nigel 27
98     printf(" ");
99     for (i = 0; i < cbit_length; i++)
100     {
101     if ((i & 7) == 0 && i != 0)
102     {
103     if ((i & 31) == 0) printf("\n");
104     printf("\n ");
105     }
106     printf("0x%02x", *tables++);
107     if (i != cbit_length - 1) printf(",");
108     }
109 nigel 43 printf(",\n\n");
110 nigel 27
111     printf(
112     "/* This table identifies various classes of character by individual bits:\n"
113     " 0x%02x white space character\n"
114     " 0x%02x letter\n"
115     " 0x%02x decimal digit\n"
116     " 0x%02x hexadecimal digit\n"
117     " 0x%02x alphanumeric or '_'\n"
118     " 0x%02x regular expression metacharacter or binary zero\n*/\n\n",
119     ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
120     ctype_meta);
121    
122     printf(" ");
123     for (i = 0; i < 256; i++)
124     {
125     if ((i & 7) == 0 && i != 0)
126     {
127     printf(" /* ");
128     if (isprint(i-8)) printf(" %c -", i-8);
129     else printf("%3d-", i-8);
130     if (isprint(i-1)) printf(" %c ", i-1);
131     else printf("%3d", i-1);
132     printf(" */\n ");
133     }
134     printf("0x%02x", *tables++);
135     if (i != 255) printf(",");
136     }
137    
138     printf("};/* ");
139     if (isprint(i-8)) printf(" %c -", i-8);
140     else printf("%3d-", i-8);
141     if (isprint(i-1)) printf(" %c ", i-1);
142     else printf("%3d", i-1);
143     printf(" */\n\n/* End of chartables.c */\n");
144    
145     return 0;
146     }
147    
148     /* End of dftables.c */

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