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

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Revision 73 - (show annotations) (download)
Sat Feb 24 21:40:30 2007 UTC (7 years, 2 months ago) by nigel
File MIME type: text/plain
File size: 5182 byte(s)
Load pcre-4.5 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) 1997-2003 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 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 -----------------------------------------------------------------------------
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(int argc, char **argv)
54 {
55 int i;
56 FILE *f;
57 const unsigned char *tables = pcre_maketables();
58
59 if (argc != 2)
60 {
61 fprintf(stderr, "dftables: one filename argument is required\n");
62 return 1;
63 }
64
65 f = fopen(argv[1], "w");
66 if (f == NULL)
67 {
68 fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
69 return 1;
70 }
71
72 /* There are two fprintf() calls here, because gcc in pedantic mode complains
73 about the very long string otherwise. */
74
75 fprintf(f,
76 "/*************************************************\n"
77 "* Perl-Compatible Regular Expressions *\n"
78 "*************************************************/\n\n"
79 "/* This file is automatically written by the dftables auxiliary \n"
80 "program. If you edit it by hand, you might like to edit the Makefile to \n"
81 "prevent its ever being regenerated.\n\n");
82 fprintf(f,
83 "This file is #included in the compilation of pcre.c to build the default\n"
84 "character tables which are used when no tables are passed to the compile\n"
85 "function. */\n\n"
86 "static unsigned char pcre_default_tables[] = {\n\n"
87 "/* This table is a lower casing table. */\n\n");
88
89 fprintf(f, " ");
90 for (i = 0; i < 256; i++)
91 {
92 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
93 fprintf(f, "%3d", *tables++);
94 if (i != 255) fprintf(f, ",");
95 }
96 fprintf(f, ",\n\n");
97
98 fprintf(f, "/* This table is a case flipping table. */\n\n");
99
100 fprintf(f, " ");
101 for (i = 0; i < 256; i++)
102 {
103 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
104 fprintf(f, "%3d", *tables++);
105 if (i != 255) fprintf(f, ",");
106 }
107 fprintf(f, ",\n\n");
108
109 fprintf(f,
110 "/* This table contains bit maps for various character classes.\n"
111 "Each map is 32 bytes long and the bits run from the least\n"
112 "significant end of each byte. The classes that have their own\n"
113 "maps are: space, xdigit, digit, upper, lower, word, graph\n"
114 "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
115
116 fprintf(f, " ");
117 for (i = 0; i < cbit_length; i++)
118 {
119 if ((i & 7) == 0 && i != 0)
120 {
121 if ((i & 31) == 0) fprintf(f, "\n");
122 fprintf(f, "\n ");
123 }
124 fprintf(f, "0x%02x", *tables++);
125 if (i != cbit_length - 1) fprintf(f, ",");
126 }
127 fprintf(f, ",\n\n");
128
129 fprintf(f,
130 "/* This table identifies various classes of character by individual bits:\n"
131 " 0x%02x white space character\n"
132 " 0x%02x letter\n"
133 " 0x%02x decimal digit\n"
134 " 0x%02x hexadecimal digit\n"
135 " 0x%02x alphanumeric or '_'\n"
136 " 0x%02x regular expression metacharacter or binary zero\n*/\n\n",
137 ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
138 ctype_meta);
139
140 fprintf(f, " ");
141 for (i = 0; i < 256; i++)
142 {
143 if ((i & 7) == 0 && i != 0)
144 {
145 fprintf(f, " /* ");
146 if (isprint(i-8)) fprintf(f, " %c -", i-8);
147 else fprintf(f, "%3d-", i-8);
148 if (isprint(i-1)) fprintf(f, " %c ", i-1);
149 else fprintf(f, "%3d", i-1);
150 fprintf(f, " */\n ");
151 }
152 fprintf(f, "0x%02x", *tables++);
153 if (i != 255) fprintf(f, ",");
154 }
155
156 fprintf(f, "};/* ");
157 if (isprint(i-8)) fprintf(f, " %c -", i-8);
158 else fprintf(f, "%3d-", i-8);
159 if (isprint(i-1)) fprintf(f, " %c ", i-1);
160 else fprintf(f, "%3d", i-1);
161 fprintf(f, " */\n\n/* End of chartables.c */\n");
162
163 fclose(f);
164 return 0;
165 }
166
167 /* End of dftables.c */

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