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

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Revision 75 - (show annotations) (download)
Sat Feb 24 21:40:37 2007 UTC (7 years, 8 months ago) by nigel
File MIME type: text/plain
File size: 5808 byte(s)
Load pcre-5.0 into code/trunk.

1 /*************************************************
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) 1997-2004 University of Cambridge
12
13 -----------------------------------------------------------------------------
14 Redistribution and use in source and binary forms, with or without
15 modification, are permitted provided that the following conditions are met:
16
17 * Redistributions of source code must retain the above copyright notice,
18 this list of conditions and the following disclaimer.
19
20 * Redistributions in binary form must reproduce the above copyright
21 notice, this list of conditions and the following disclaimer in the
22 documentation and/or other materials provided with the distribution.
23
24 * Neither the name of the University of Cambridge nor the names of its
25 contributors may be used to endorse or promote products derived from
26 this software without specific prior written permission.
27
28 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
29 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
32 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
33 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
34 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
35 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
36 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
37 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
38 POSSIBILITY OF SUCH DAMAGE.
39 -----------------------------------------------------------------------------
40 */
41
42
43 /* This is a support program to generate the file chartables.c, containing
44 character tables of various kinds. They are built according to the default C
45 locale and used as the default tables by PCRE. Now that pcre_maketables is
46 a function visible to the outside world, we make use of its code from here in
47 order to be consistent. */
48
49 #include <ctype.h>
50 #include <stdio.h>
51 #include <string.h>
52
53 #include "internal.h"
54
55 #define DFTABLES /* maketables.c notices this */
56 #include "maketables.c"
57
58
59 int main(int argc, char **argv)
60 {
61 int i;
62 FILE *f;
63 const unsigned char *tables = pcre_maketables();
64
65 if (argc != 2)
66 {
67 fprintf(stderr, "dftables: one filename argument is required\n");
68 return 1;
69 }
70
71 f = fopen(argv[1], "w");
72 if (f == NULL)
73 {
74 fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
75 return 1;
76 }
77
78 /* There are two fprintf() calls here, because gcc in pedantic mode complains
79 about the very long string otherwise. */
80
81 fprintf(f,
82 "/*************************************************\n"
83 "* Perl-Compatible Regular Expressions *\n"
84 "*************************************************/\n\n"
85 "/* This file is automatically written by the dftables auxiliary \n"
86 "program. If you edit it by hand, you might like to edit the Makefile to \n"
87 "prevent its ever being regenerated.\n\n");
88 fprintf(f,
89 "This file is #included in the compilation of pcre.c to build the default\n"
90 "character tables which are used when no tables are passed to the compile\n"
91 "function. */\n\n"
92 "static unsigned char pcre_default_tables[] = {\n\n"
93 "/* This table is a lower casing table. */\n\n");
94
95 fprintf(f, " ");
96 for (i = 0; i < 256; i++)
97 {
98 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
99 fprintf(f, "%3d", *tables++);
100 if (i != 255) fprintf(f, ",");
101 }
102 fprintf(f, ",\n\n");
103
104 fprintf(f, "/* This table is a case flipping table. */\n\n");
105
106 fprintf(f, " ");
107 for (i = 0; i < 256; i++)
108 {
109 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
110 fprintf(f, "%3d", *tables++);
111 if (i != 255) fprintf(f, ",");
112 }
113 fprintf(f, ",\n\n");
114
115 fprintf(f,
116 "/* This table contains bit maps for various character classes.\n"
117 "Each map is 32 bytes long and the bits run from the least\n"
118 "significant end of each byte. The classes that have their own\n"
119 "maps are: space, xdigit, digit, upper, lower, word, graph\n"
120 "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
121
122 fprintf(f, " ");
123 for (i = 0; i < cbit_length; i++)
124 {
125 if ((i & 7) == 0 && i != 0)
126 {
127 if ((i & 31) == 0) fprintf(f, "\n");
128 fprintf(f, "\n ");
129 }
130 fprintf(f, "0x%02x", *tables++);
131 if (i != cbit_length - 1) fprintf(f, ",");
132 }
133 fprintf(f, ",\n\n");
134
135 fprintf(f,
136 "/* This table identifies various classes of character by individual bits:\n"
137 " 0x%02x white space character\n"
138 " 0x%02x letter\n"
139 " 0x%02x decimal digit\n"
140 " 0x%02x hexadecimal digit\n"
141 " 0x%02x alphanumeric or '_'\n"
142 " 0x%02x regular expression metacharacter or binary zero\n*/\n\n",
143 ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
144 ctype_meta);
145
146 fprintf(f, " ");
147 for (i = 0; i < 256; i++)
148 {
149 if ((i & 7) == 0 && i != 0)
150 {
151 fprintf(f, " /* ");
152 if (isprint(i-8)) fprintf(f, " %c -", i-8);
153 else fprintf(f, "%3d-", i-8);
154 if (isprint(i-1)) fprintf(f, " %c ", i-1);
155 else fprintf(f, "%3d", i-1);
156 fprintf(f, " */\n ");
157 }
158 fprintf(f, "0x%02x", *tables++);
159 if (i != 255) fprintf(f, ",");
160 }
161
162 fprintf(f, "};/* ");
163 if (isprint(i-8)) fprintf(f, " %c -", i-8);
164 else fprintf(f, "%3d-", i-8);
165 if (isprint(i-1)) fprintf(f, " %c ", i-1);
166 else fprintf(f, "%3d", i-1);
167 fprintf(f, " */\n\n/* End of chartables.c */\n");
168
169 fclose(f);
170 return 0;
171 }
172
173 /* End of dftables.c */

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