/[pcre]/code/trunk/dftables.c
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Contents of /code/trunk/dftables.c

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Revision 27 - (hide annotations) (download)
Sat Feb 24 21:38:49 2007 UTC (7 years, 7 months ago) by nigel
File MIME type: text/plain
File size: 4280 byte(s)
Load pcre-2.02 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     Copyright (c) 1997-1999 University of Cambridge
12    
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     -----------------------------------------------------------------------------
28    
29     See the file Tech.Notes for some information on the internals.
30     */
31    
32    
33     /* This is a support program to generate the file chartables.c, containing
34     character tables of various kinds. They are built according to the default C
35     locale and used as the default tables by PCRE. Now that pcre_maketables is
36     a function visible to the outside world, we make use of its code from here in
37     order to be consistent. */
38    
39     #include <ctype.h>
40     #include <stdio.h>
41     #include <string.h>
42    
43     #include "internal.h"
44    
45     #define DFTABLES /* maketables.c notices this */
46     #include "maketables.c"
47    
48    
49     int main(void)
50     {
51     int i;
52     unsigned const char *tables = pcre_maketables();
53    
54     printf(
55     "/*************************************************\n"
56     "* Perl-Compatible Regular Expressions *\n"
57     "*************************************************/\n\n"
58     "/* This file is automatically written by the makechartables auxiliary \n"
59     "program. If you edit it by hand, you might like to edit the Makefile to \n"
60     "prevent its ever being regenerated.\n\n"
61     "This file is #included in the compilation of pcre.c to build the default\n"
62     "character tables which are used when no tables are passed to the compile\n"
63     "function. */\n\n"
64     "static unsigned char pcre_default_tables[] = {\n\n"
65     "/* This table is a lower casing table. */\n\n");
66    
67     printf(" ");
68     for (i = 0; i < 256; i++)
69     {
70     if ((i & 7) == 0 && i != 0) printf("\n ");
71     printf("%3d", *tables++);
72     if (i != 255) printf(",");
73     }
74     printf(",\n\n");
75    
76     printf("/* This table is a case flipping table. */\n\n");
77    
78     printf(" ");
79     for (i = 0; i < 256; i++)
80     {
81     if ((i & 7) == 0 && i != 0) printf("\n ");
82     printf("%3d", *tables++);
83     if (i != 255) printf(",");
84     }
85     printf(",\n\n");
86    
87     printf(
88     "/* This table contains bit maps for digits, 'word' chars, and white\n"
89     "space. Each map is 32 bytes long and the bits run from the least\n"
90     "significant end of each byte. */\n\n");
91    
92     printf(" ");
93     for (i = 0; i < cbit_length; i++)
94     {
95     if ((i & 7) == 0 && i != 0)
96     {
97     if ((i & 31) == 0) printf("\n");
98     printf("\n ");
99     }
100     printf("0x%02x", *tables++);
101     if (i != cbit_length - 1) printf(",");
102     }
103     printf(" ,\n\n");
104    
105     printf(
106     "/* This table identifies various classes of character by individual bits:\n"
107     " 0x%02x white space character\n"
108     " 0x%02x letter\n"
109     " 0x%02x decimal digit\n"
110     " 0x%02x hexadecimal digit\n"
111     " 0x%02x alphanumeric or '_'\n"
112     " 0x%02x regular expression metacharacter or binary zero\n*/\n\n",
113     ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
114     ctype_meta);
115    
116     printf(" ");
117     for (i = 0; i < 256; i++)
118     {
119     if ((i & 7) == 0 && i != 0)
120     {
121     printf(" /* ");
122     if (isprint(i-8)) printf(" %c -", i-8);
123     else printf("%3d-", i-8);
124     if (isprint(i-1)) printf(" %c ", i-1);
125     else printf("%3d", i-1);
126     printf(" */\n ");
127     }
128     printf("0x%02x", *tables++);
129     if (i != 255) printf(",");
130     }
131    
132     printf("};/* ");
133     if (isprint(i-8)) printf(" %c -", i-8);
134     else printf("%3d-", i-8);
135     if (isprint(i-1)) printf(" %c ", i-1);
136     else printf("%3d", i-1);
137     printf(" */\n\n/* End of chartables.c */\n");
138    
139     return 0;
140     }
141    
142     /* End of dftables.c */

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