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

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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 ph10 305 Copyright (c) 1997-2008 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 ph10 128 /* 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 nigel 77 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 ph10 200 #ifdef HAVE_CONFIG_H
47 ph10 236 #include "config.h"
48 ph10 200 #endif
49 ph10 199
50 nigel 27 #include <ctype.h>
51     #include <stdio.h>
52     #include <string.h>
53 ph10 128 #include <locale.h>
54 nigel 27
55 nigel 77 #include "pcre_internal.h"
56 nigel 27
57 nigel 77 #define DFTABLES /* pcre_maketables.c notices this */
58     #include "pcre_maketables.c"
59 nigel 27
60    
61 nigel 73 int main(int argc, char **argv)
62 nigel 27 {
63 nigel 73 FILE *f;
64 ph10 128 int i = 1;
65     const unsigned char *tables;
66     const unsigned char *base_of_tables;
67 nigel 27
68 ph10 128 /* 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 nigel 73 {
74 ph10 128 setlocale(LC_ALL, ""); /* Set from environment variables */
75     i++;
76     }
77    
78     if (argc < i + 1)
79     {
80 nigel 73 fprintf(stderr, "dftables: one filename argument is required\n");
81     return 1;
82     }
83    
84 ph10 128 tables = pcre_maketables();
85     base_of_tables = tables;
86    
87     f = fopen(argv[i], "wb");
88 nigel 73 if (f == NULL)
89     {
90     fprintf(stderr, "dftables: failed to open %s for writing\n", argv[1]);
91     return 1;
92     }
93    
94 ph10 128 /* There are several fprintf() calls here, because gcc in pedantic mode
95     complains about the very long string otherwise. */
96 nigel 65
97 nigel 73 fprintf(f,
98 nigel 27 "/*************************************************\n"
99     "* Perl-Compatible Regular Expressions *\n"
100     "*************************************************/\n\n"
101 ph10 128 "/* 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 nigel 73 fprintf(f,
106 ph10 199 "The following #includes are present because without them gcc 4.x may remove\n"
107 nigel 93 "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 ph10 200 "#ifdef HAVE_CONFIG_H\n"
113 ph10 241 "#include \"config.h\"\n"
114 ph10 200 "#endif\n\n"
115 nigel 93 "#include \"pcre_internal.h\"\n\n");
116     fprintf(f,
117 nigel 77 "const unsigned char _pcre_default_tables[] = {\n\n"
118 nigel 27 "/* This table is a lower casing table. */\n\n");
119    
120 nigel 73 fprintf(f, " ");
121 nigel 27 for (i = 0; i < 256; i++)
122     {
123 nigel 73 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
124     fprintf(f, "%3d", *tables++);
125     if (i != 255) fprintf(f, ",");
126 nigel 27 }
127 nigel 73 fprintf(f, ",\n\n");
128 nigel 27
129 nigel 73 fprintf(f, "/* This table is a case flipping table. */\n\n");
130 nigel 27
131 nigel 73 fprintf(f, " ");
132 nigel 27 for (i = 0; i < 256; i++)
133     {
134 nigel 73 if ((i & 7) == 0 && i != 0) fprintf(f, "\n ");
135     fprintf(f, "%3d", *tables++);
136     if (i != 255) fprintf(f, ",");
137 nigel 27 }
138 nigel 73 fprintf(f, ",\n\n");
139 nigel 27
140 nigel 73 fprintf(f,
141 nigel 43 "/* 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 nigel 27
147 nigel 73 fprintf(f, " ");
148 nigel 27 for (i = 0; i < cbit_length; i++)
149     {
150     if ((i & 7) == 0 && i != 0)
151     {
152 nigel 73 if ((i & 31) == 0) fprintf(f, "\n");
153     fprintf(f, "\n ");
154 nigel 27 }
155 nigel 73 fprintf(f, "0x%02x", *tables++);
156     if (i != cbit_length - 1) fprintf(f, ",");
157 nigel 27 }
158 nigel 73 fprintf(f, ",\n\n");
159 nigel 27
160 nigel 73 fprintf(f,
161 nigel 27 "/* 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 nigel 73 fprintf(f, " ");
172 nigel 27 for (i = 0; i < 256; i++)
173     {
174     if ((i & 7) == 0 && i != 0)
175     {
176 nigel 73 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 nigel 27 }
183 nigel 73 fprintf(f, "0x%02x", *tables++);
184     if (i != 255) fprintf(f, ",");
185 nigel 27 }
186    
187 nigel 73 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 ph10 128 fprintf(f, " */\n\n/* End of pcre_chartables.c */\n");
193 nigel 27
194 nigel 73 fclose(f);
195 nigel 77 free((void *)base_of_tables);
196 nigel 27 return 0;
197     }
198    
199     /* End of dftables.c */

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