Annotation of embedaddon/pcre/dftables.c, revision 1.1.1.1
1.1 misho 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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