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

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Revision 81 - (show annotations) (download)
Sat Feb 24 21:40:59 2007 UTC (7 years, 9 months ago) by nigel
File MIME type: text/plain
File size: 5876 byte(s)
Load pcre-6.2 into code/trunk.

1 /*************************************************
2 * Perl-Compatible Regular Expressions *
3 *************************************************/
4
5 /* PCRE is a library of functions to support regular expressions whose syntax
6 and semantics are as close as possible to those of the Perl 5 language.
7
8 Written by Philip Hazel
9 Copyright (c) 1997-2005 University of Cambridge
10
11 -----------------------------------------------------------------------------
12 Redistribution and use in source and binary forms, with or without
13 modification, are permitted provided that the following conditions are met:
14
15 * Redistributions of source code must retain the above copyright notice,
16 this list of conditions and the following disclaimer.
17
18 * 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
22 * 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
26 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 -----------------------------------------------------------------------------
38 */
39
40
41 /* 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
46 #include <ctype.h>
47 #include <stdio.h>
48 #include <string.h>
49
50 #include "pcre_internal.h"
51
52 #define DFTABLES /* pcre_maketables.c notices this */
53 #include "pcre_maketables.c"
54
55
56 int main(int argc, char **argv)
57 {
58 int i;
59 FILE *f;
60 const unsigned char *tables = pcre_maketables();
61 const unsigned char *base_of_tables = tables;
62
63 if (argc != 2)
64 {
65 fprintf(stderr, "dftables: one filename argument is required\n");
66 return 1;
67 }
68
69 f = fopen(argv[1], "wb");
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 about the very long string otherwise. */
78
79 fprintf(f,
80 "/*************************************************\n"
81 "* Perl-Compatible Regular Expressions *\n"
82 "*************************************************/\n\n"
83 "/* This file is automatically written by the dftables auxiliary \n"
84 "program. If you edit it by hand, you might like to edit the Makefile to \n"
85 "prevent its ever being regenerated.\n\n");
86 fprintf(f,
87 "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 "/* This table is a lower casing table. */\n\n");
92
93 fprintf(f, " ");
94 for (i = 0; i < 256; i++)
95 {
96 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
97 fprintf(f, "%3d", *tables++);
98 if (i != 255) fprintf(f, ",");
99 }
100 fprintf(f, ",\n\n");
101
102 fprintf(f, "/* This table is a case flipping table. */\n\n");
103
104 fprintf(f, " ");
105 for (i = 0; i < 256; i++)
106 {
107 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
108 fprintf(f, "%3d", *tables++);
109 if (i != 255) fprintf(f, ",");
110 }
111 fprintf(f, ",\n\n");
112
113 fprintf(f,
114 "/* 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
120 fprintf(f, " ");
121 for (i = 0; i < cbit_length; i++)
122 {
123 if ((i & 7) == 0 && i != 0)
124 {
125 if ((i & 31) == 0) fprintf(f, "\n");
126 fprintf(f, "\n ");
127 }
128 fprintf(f, "0x%02x", *tables++);
129 if (i != cbit_length - 1) fprintf(f, ",");
130 }
131 fprintf(f, ",\n\n");
132
133 fprintf(f,
134 "/* 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 fprintf(f, " ");
145 for (i = 0; i < 256; i++)
146 {
147 if ((i & 7) == 0 && i != 0)
148 {
149 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 }
156 fprintf(f, "0x%02x", *tables++);
157 if (i != 255) fprintf(f, ",");
158 }
159
160 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
167 fclose(f);
168 free((void *)base_of_tables);
169 return 0;
170 }
171
172 /* End of dftables.c */

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