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

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Revision 77 - (hide annotations) (download)
Sat Feb 24 21:40:45 2007 UTC (7 years, 1 month ago) by nigel
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File size: 5875 byte(s)
Load pcre-6.0 into code/trunk.

1 nigel 27 /*************************************************
2     * Perl-Compatible Regular Expressions *
3     *************************************************/
4    
5 nigel 77 /* PCRE is a library of functions to support regular expressions whose syntax
6 nigel 27 and semantics are as close as possible to those of the Perl 5 language.
7    
8 nigel 77 Written by Philip Hazel
9     Copyright (c) 1997-2005 University of Cambridge
10 nigel 27
11     -----------------------------------------------------------------------------
12 nigel 75 Redistribution and use in source and binary forms, with or without
13     modification, are permitted provided that the following conditions are met:
14 nigel 27
15 nigel 75 * Redistributions of source code must retain the above copyright notice,
16     this list of conditions and the following disclaimer.
17 nigel 27
18 nigel 75 * 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 nigel 27
22 nigel 75 * 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 nigel 29
26 nigel 75 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27     AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28     IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29     ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30     LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31     CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32     SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33     INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36     POSSIBILITY OF SUCH DAMAGE.
37 nigel 27 -----------------------------------------------------------------------------
38     */
39    
40    
41 nigel 77 /* This is a freestanding support program to generate a file containing default
42     character tables for PCRE. The tables are built according to the default C
43     locale. Now that pcre_maketables is a function visible to the outside world, we
44     make use of its code from here in order to be consistent. */
45 nigel 27
46     #include <ctype.h>
47     #include <stdio.h>
48     #include <string.h>
49    
50 nigel 77 #include "pcre_internal.h"
51 nigel 27
52 nigel 77 #define DFTABLES /* pcre_maketables.c notices this */
53     #include "pcre_maketables.c"
54 nigel 27
55    
56 nigel 73 int main(int argc, char **argv)
57 nigel 27 {
58     int i;
59 nigel 73 FILE *f;
60 nigel 53 const unsigned char *tables = pcre_maketables();
61 nigel 77 const unsigned char *base_of_tables = tables;
62 nigel 27
63 nigel 73 if (argc != 2)
64     {
65     fprintf(stderr, "dftables: one filename argument is required\n");
66     return 1;
67     }
68    
69     f = fopen(argv[1], "w");
70     if (f == NULL)
71     {
72     fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
73     return 1;
74     }
75    
76     /* There are two fprintf() calls here, because gcc in pedantic mode complains
77 nigel 65 about the very long string otherwise. */
78    
79 nigel 73 fprintf(f,
80 nigel 27 "/*************************************************\n"
81     "* Perl-Compatible Regular Expressions *\n"
82     "*************************************************/\n\n"
83 nigel 35 "/* This file is automatically written by the dftables auxiliary \n"
84 nigel 27 "program. If you edit it by hand, you might like to edit the Makefile to \n"
85 nigel 65 "prevent its ever being regenerated.\n\n");
86 nigel 73 fprintf(f,
87 nigel 77 "This file contains the default tables for characters with codes less than\n"
88     "128 (ASCII characters). These tables are used when no external tables are\n"
89     "passed to PCRE. */\n\n"
90     "const unsigned char _pcre_default_tables[] = {\n\n"
91 nigel 27 "/* This table is a lower casing table. */\n\n");
92    
93 nigel 73 fprintf(f, " ");
94 nigel 27 for (i = 0; i < 256; i++)
95     {
96 nigel 73 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
97     fprintf(f, "%3d", *tables++);
98     if (i != 255) fprintf(f, ",");
99 nigel 27 }
100 nigel 73 fprintf(f, ",\n\n");
101 nigel 27
102 nigel 73 fprintf(f, "/* This table is a case flipping table. */\n\n");
103 nigel 27
104 nigel 73 fprintf(f, " ");
105 nigel 27 for (i = 0; i < 256; i++)
106     {
107 nigel 73 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
108     fprintf(f, "%3d", *tables++);
109     if (i != 255) fprintf(f, ",");
110 nigel 27 }
111 nigel 73 fprintf(f, ",\n\n");
112 nigel 27
113 nigel 73 fprintf(f,
114 nigel 43 "/* This table contains bit maps for various character classes.\n"
115     "Each map is 32 bytes long and the bits run from the least\n"
116     "significant end of each byte. The classes that have their own\n"
117     "maps are: space, xdigit, digit, upper, lower, word, graph\n"
118     "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
119 nigel 27
120 nigel 73 fprintf(f, " ");
121 nigel 27 for (i = 0; i < cbit_length; i++)
122     {
123     if ((i & 7) == 0 && i != 0)
124     {
125 nigel 73 if ((i & 31) == 0) fprintf(f, "\n");
126     fprintf(f, "\n ");
127 nigel 27 }
128 nigel 73 fprintf(f, "0x%02x", *tables++);
129     if (i != cbit_length - 1) fprintf(f, ",");
130 nigel 27 }
131 nigel 73 fprintf(f, ",\n\n");
132 nigel 27
133 nigel 73 fprintf(f,
134 nigel 27 "/* This table identifies various classes of character by individual bits:\n"
135     " 0x%02x white space character\n"
136     " 0x%02x letter\n"
137     " 0x%02x decimal digit\n"
138     " 0x%02x hexadecimal digit\n"
139     " 0x%02x alphanumeric or '_'\n"
140     " 0x%02x regular expression metacharacter or binary zero\n*/\n\n",
141     ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
142     ctype_meta);
143    
144 nigel 73 fprintf(f, " ");
145 nigel 27 for (i = 0; i < 256; i++)
146     {
147     if ((i & 7) == 0 && i != 0)
148     {
149 nigel 73 fprintf(f, " /* ");
150     if (isprint(i-8)) fprintf(f, " %c -", i-8);
151     else fprintf(f, "%3d-", i-8);
152     if (isprint(i-1)) fprintf(f, " %c ", i-1);
153     else fprintf(f, "%3d", i-1);
154     fprintf(f, " */\n ");
155 nigel 27 }
156 nigel 73 fprintf(f, "0x%02x", *tables++);
157     if (i != 255) fprintf(f, ",");
158 nigel 27 }
159    
160 nigel 73 fprintf(f, "};/* ");
161     if (isprint(i-8)) fprintf(f, " %c -", i-8);
162     else fprintf(f, "%3d-", i-8);
163     if (isprint(i-1)) fprintf(f, " %c ", i-1);
164     else fprintf(f, "%3d", i-1);
165     fprintf(f, " */\n\n/* End of chartables.c */\n");
166 nigel 27
167 nigel 73 fclose(f);
168 nigel 77 free((void *)base_of_tables);
169 nigel 27 return 0;
170     }
171    
172     /* End of dftables.c */

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