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

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Revision 305 - (show annotations) (download)
Sun Jan 20 20:07:32 2008 UTC (6 years, 2 months ago) by ph10
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Update copyright year to 2008.

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) 1997-2008 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
42 character tables for PCRE. The tables are built according to the current
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 #ifdef HAVE_CONFIG_H
47 #include "config.h"
48 #endif
49
50 #include <ctype.h>
51 #include <stdio.h>
52 #include <string.h>
53 #include <locale.h>
54
55 #include "pcre_internal.h"
56
57 #define DFTABLES /* pcre_maketables.c notices this */
58 #include "pcre_maketables.c"
59
60
61 int main(int argc, char **argv)
62 {
63 FILE *f;
64 int i = 1;
65 const unsigned char *tables;
66 const unsigned char *base_of_tables;
67
68 /* By default, the default C locale is used rather than what the building user
69 happens to have set. However, if the -L option is given, set the locale from
70 the LC_xxx environment variables. */
71
72 if (argc > 1 && strcmp(argv[1], "-L") == 0)
73 {
74 setlocale(LC_ALL, ""); /* Set from environment variables */
75 i++;
76 }
77
78 if (argc < i + 1)
79 {
80 fprintf(stderr, "dftables: one filename argument is required\n");
81 return 1;
82 }
83
84 tables = pcre_maketables();
85 base_of_tables = tables;
86
87 f = fopen(argv[i], "wb");
88 if (f == NULL)
89 {
90 fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
91 return 1;
92 }
93
94 /* There are several fprintf() calls here, because gcc in pedantic mode
95 complains about the very long string otherwise. */
96
97 fprintf(f,
98 "/*************************************************\n"
99 "* Perl-Compatible Regular Expressions *\n"
100 "*************************************************/\n\n"
101 "/* This file was automatically written by the dftables auxiliary\n"
102 "program. It contains character tables that are used when no external\n"
103 "tables are passed to PCRE by the application that calls it. The tables\n"
104 "are used only for characters whose code values are less than 256.\n\n");
105 fprintf(f,
106 "The following #includes are present because without them gcc 4.x may remove\n"
107 "the array definition from the final binary if PCRE is built into a static\n"
108 "library and dead code stripping is activated. This leads to link errors.\n"
109 "Pulling in the header ensures that the array gets flagged as \"someone\n"
110 "outside this compilation unit might reference this\" and so it will always\n"
111 "be supplied to the linker. */\n\n"
112 "#ifdef HAVE_CONFIG_H\n"
113 "#include \"config.h\"\n"
114 "#endif\n\n"
115 "#include \"pcre_internal.h\"\n\n");
116 fprintf(f,
117 "const unsigned char _pcre_default_tables[] = {\n\n"
118 "/* This table is a lower casing table. */\n\n");
119
120 fprintf(f, " ");
121 for (i = 0; i < 256; i++)
122 {
123 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
124 fprintf(f, "%3d", *tables++);
125 if (i != 255) fprintf(f, ",");
126 }
127 fprintf(f, ",\n\n");
128
129 fprintf(f, "/* This table is a case flipping table. */\n\n");
130
131 fprintf(f, " ");
132 for (i = 0; i < 256; i++)
133 {
134 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
135 fprintf(f, "%3d", *tables++);
136 if (i != 255) fprintf(f, ",");
137 }
138 fprintf(f, ",\n\n");
139
140 fprintf(f,
141 "/* This table contains bit maps for various character classes.\n"
142 "Each map is 32 bytes long and the bits run from the least\n"
143 "significant end of each byte. The classes that have their own\n"
144 "maps are: space, xdigit, digit, upper, lower, word, graph\n"
145 "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
146
147 fprintf(f, " ");
148 for (i = 0; i < cbit_length; i++)
149 {
150 if ((i & 7) == 0 && i != 0)
151 {
152 if ((i & 31) == 0) fprintf(f, "\n");
153 fprintf(f, "\n ");
154 }
155 fprintf(f, "0x%02x", *tables++);
156 if (i != cbit_length - 1) fprintf(f, ",");
157 }
158 fprintf(f, ",\n\n");
159
160 fprintf(f,
161 "/* This table identifies various classes of character by individual bits:\n"
162 " 0x%02x white space character\n"
163 " 0x%02x letter\n"
164 " 0x%02x decimal digit\n"
165 " 0x%02x hexadecimal digit\n"
166 " 0x%02x alphanumeric or '_'\n"
167 " 0x%02x regular expression metacharacter or binary zero\n*/\n\n",
168 ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
169 ctype_meta);
170
171 fprintf(f, " ");
172 for (i = 0; i < 256; i++)
173 {
174 if ((i & 7) == 0 && i != 0)
175 {
176 fprintf(f, " /* ");
177 if (isprint(i-8)) fprintf(f, " %c -", i-8);
178 else fprintf(f, "%3d-", i-8);
179 if (isprint(i-1)) fprintf(f, " %c ", i-1);
180 else fprintf(f, "%3d", i-1);
181 fprintf(f, " */\n ");
182 }
183 fprintf(f, "0x%02x", *tables++);
184 if (i != 255) fprintf(f, ",");
185 }
186
187 fprintf(f, "};/* ");
188 if (isprint(i-8)) fprintf(f, " %c -", i-8);
189 else fprintf(f, "%3d-", i-8);
190 if (isprint(i-1)) fprintf(f, " %c ", i-1);
191 else fprintf(f, "%3d", i-1);
192 fprintf(f, " */\n\n/* End of pcre_chartables.c */\n");
193
194 fclose(f);
195 free((void *)base_of_tables);
196 return 0;
197 }
198
199 /* End of dftables.c */

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