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 */ 200
