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

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Revision 93 - (hide annotations) (download)
Sat Feb 24 21:41:42 2007 UTC (7 years, 6 months ago) by nigel
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File size: 6369 byte(s)
Load pcre-7.0 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 nigel 87 Copyright (c) 1997-2006 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 nigel 81 f = fopen(argv[1], "wb");
70 nigel 73 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 nigel 93 "passed to PCRE.\n\n");
90     fprintf(f,
91     "The following #include is present because without it gcc 4.x may remove\n"
92     "the array definition from the final binary if PCRE is built into a static\n"
93     "library and dead code stripping is activated. This leads to link errors.\n"
94     "Pulling in the header ensures that the array gets flagged as \"someone\n"
95     "outside this compilation unit might reference this\" and so it will always\n"
96     "be supplied to the linker. */\n\n"
97     "#include \"pcre_internal.h\"\n\n");
98     fprintf(f,
99 nigel 77 "const unsigned char _pcre_default_tables[] = {\n\n"
100 nigel 27 "/* This table is a lower casing table. */\n\n");
101    
102 nigel 73 fprintf(f, " ");
103 nigel 27 for (i = 0; i < 256; i++)
104     {
105 nigel 73 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
106     fprintf(f, "%3d", *tables++);
107     if (i != 255) fprintf(f, ",");
108 nigel 27 }
109 nigel 73 fprintf(f, ",\n\n");
110 nigel 27
111 nigel 73 fprintf(f, "/* This table is a case flipping table. */\n\n");
112 nigel 27
113 nigel 73 fprintf(f, " ");
114 nigel 27 for (i = 0; i < 256; i++)
115     {
116 nigel 73 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
117     fprintf(f, "%3d", *tables++);
118     if (i != 255) fprintf(f, ",");
119 nigel 27 }
120 nigel 73 fprintf(f, ",\n\n");
121 nigel 27
122 nigel 73 fprintf(f,
123 nigel 43 "/* This table contains bit maps for various character classes.\n"
124     "Each map is 32 bytes long and the bits run from the least\n"
125     "significant end of each byte. The classes that have their own\n"
126     "maps are: space, xdigit, digit, upper, lower, word, graph\n"
127     "print, punct, and cntrl. Other classes are built from combinations. */\n\n");
128 nigel 27
129 nigel 73 fprintf(f, " ");
130 nigel 27 for (i = 0; i < cbit_length; i++)
131     {
132     if ((i & 7) == 0 && i != 0)
133     {
134 nigel 73 if ((i & 31) == 0) fprintf(f, "\n");
135     fprintf(f, "\n ");
136 nigel 27 }
137 nigel 73 fprintf(f, "0x%02x", *tables++);
138     if (i != cbit_length - 1) fprintf(f, ",");
139 nigel 27 }
140 nigel 73 fprintf(f, ",\n\n");
141 nigel 27
142 nigel 73 fprintf(f,
143 nigel 27 "/* This table identifies various classes of character by individual bits:\n"
144     " 0x%02x white space character\n"
145     " 0x%02x letter\n"
146     " 0x%02x decimal digit\n"
147     " 0x%02x hexadecimal digit\n"
148     " 0x%02x alphanumeric or '_'\n"
149     " 0x%02x regular expression metacharacter or binary zero\n*/\n\n",
150     ctype_space, ctype_letter, ctype_digit, ctype_xdigit, ctype_word,
151     ctype_meta);
152    
153 nigel 73 fprintf(f, " ");
154 nigel 27 for (i = 0; i < 256; i++)
155     {
156     if ((i & 7) == 0 && i != 0)
157     {
158 nigel 73 fprintf(f, " /* ");
159     if (isprint(i-8)) fprintf(f, " %c -", i-8);
160     else fprintf(f, "%3d-", i-8);
161     if (isprint(i-1)) fprintf(f, " %c ", i-1);
162     else fprintf(f, "%3d", i-1);
163     fprintf(f, " */\n ");
164 nigel 27 }
165 nigel 73 fprintf(f, "0x%02x", *tables++);
166     if (i != 255) fprintf(f, ",");
167 nigel 27 }
168    
169 nigel 73 fprintf(f, "};/* ");
170     if (isprint(i-8)) fprintf(f, " %c -", i-8);
171     else fprintf(f, "%3d-", i-8);
172     if (isprint(i-1)) fprintf(f, " %c ", i-1);
173     else fprintf(f, "%3d", i-1);
174     fprintf(f, " */\n\n/* End of chartables.c */\n");
175 nigel 27
176 nigel 73 fclose(f);
177 nigel 77 free((void *)base_of_tables);
178 nigel 27 return 0;
179     }
180    
181     /* End of dftables.c */

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