1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Kenneth Almquist. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #if 0 36 #ifndef lint 37 static char const copyright[] = 38 "@(#) Copyright (c) 1991, 1993\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 static char sccsid[] = "@(#)mksyntax.c 8.2 (Berkeley) 5/4/95"; 44 #endif /* not lint */ 45 #endif 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 /* 50 * This program creates syntax.h and syntax.c. 51 */ 52 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include "parser.h" 57 58 59 struct synclass { 60 const char *name; 61 const char *comment; 62 }; 63 64 /* Syntax classes */ 65 static const struct synclass synclass[] = { 66 { "CWORD", "character is nothing special" }, 67 { "CNL", "newline character" }, 68 { "CBACK", "a backslash character" }, 69 { "CSBACK", "a backslash character in single quotes" }, 70 { "CSQUOTE", "single quote" }, 71 { "CDQUOTE", "double quote" }, 72 { "CENDQUOTE", "a terminating quote" }, 73 { "CBQUOTE", "backwards single quote" }, 74 { "CVAR", "a dollar sign" }, 75 { "CENDVAR", "a '}' character" }, 76 { "CLP", "a left paren in arithmetic" }, 77 { "CRP", "a right paren in arithmetic" }, 78 { "CEOF", "end of file" }, 79 { "CCTL", "like CWORD, except it must be escaped" }, 80 { "CSPCL", "these terminate a word" }, 81 { "CIGN", "character should be ignored" }, 82 { NULL, NULL } 83 }; 84 85 86 /* 87 * Syntax classes for is_ functions. Warning: if you add new classes 88 * you may have to change the definition of the is_in_name macro. 89 */ 90 static const struct synclass is_entry[] = { 91 { "ISDIGIT", "a digit" }, 92 { "ISUPPER", "an upper case letter" }, 93 { "ISLOWER", "a lower case letter" }, 94 { "ISUNDER", "an underscore" }, 95 { "ISSPECL", "the name of a special parameter" }, 96 { NULL, NULL } 97 }; 98 99 static const char writer[] = "\ 100 /*\n\ 101 * This file was generated by the mksyntax program.\n\ 102 */\n\ 103 \n"; 104 105 106 static FILE *cfile; 107 static FILE *hfile; 108 109 static void add_default(void); 110 static void finish(void); 111 static void init(const char *); 112 static void add(const char *, const char *); 113 static void output_type_macros(void); 114 115 int 116 main(int argc __unused, char **argv __unused) 117 { 118 int i; 119 char buf[80]; 120 int pos; 121 122 /* Create output files */ 123 if ((cfile = fopen("syntax.c", "w")) == NULL) { 124 perror("syntax.c"); 125 exit(2); 126 } 127 if ((hfile = fopen("syntax.h", "w")) == NULL) { 128 perror("syntax.h"); 129 exit(2); 130 } 131 fputs(writer, hfile); 132 fputs(writer, cfile); 133 134 fputs("#include <sys/cdefs.h>\n", hfile); 135 fputs("#include <limits.h>\n\n", hfile); 136 137 /* Generate the #define statements in the header file */ 138 fputs("/* Syntax classes */\n", hfile); 139 for (i = 0 ; synclass[i].name ; i++) { 140 sprintf(buf, "#define %s %d", synclass[i].name, i); 141 fputs(buf, hfile); 142 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 143 putc('\t', hfile); 144 fprintf(hfile, "/* %s */\n", synclass[i].comment); 145 } 146 putc('\n', hfile); 147 fputs("/* Syntax classes for is_ functions */\n", hfile); 148 for (i = 0 ; is_entry[i].name ; i++) { 149 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); 150 fputs(buf, hfile); 151 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 152 putc('\t', hfile); 153 fprintf(hfile, "/* %s */\n", is_entry[i].comment); 154 } 155 putc('\n', hfile); 156 fputs("#define SYNBASE (1 - CHAR_MIN)\n", hfile); 157 fputs("#define PEOF -SYNBASE\n\n", hfile); 158 putc('\n', hfile); 159 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 160 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 161 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 162 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 163 putc('\n', hfile); 164 output_type_macros(); /* is_digit, etc. */ 165 putc('\n', hfile); 166 167 /* Generate the syntax tables. */ 168 fputs("#include \"parser.h\"\n", cfile); 169 fputs("#include \"shell.h\"\n", cfile); 170 fputs("#include \"syntax.h\"\n\n", cfile); 171 172 fputs("/* syntax table used when not in quotes */\n", cfile); 173 init("basesyntax"); 174 add_default(); 175 add("\n", "CNL"); 176 add("\\", "CBACK"); 177 add("'", "CSQUOTE"); 178 add("\"", "CDQUOTE"); 179 add("`", "CBQUOTE"); 180 add("$", "CVAR"); 181 add("}", "CENDVAR"); 182 add("<>();&| \t", "CSPCL"); 183 finish(); 184 185 fputs("\n/* syntax table used when in double quotes */\n", cfile); 186 init("dqsyntax"); 187 add_default(); 188 add("\n", "CNL"); 189 add("\\", "CBACK"); 190 add("\"", "CENDQUOTE"); 191 add("`", "CBQUOTE"); 192 add("$", "CVAR"); 193 add("}", "CENDVAR"); 194 /* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */ 195 add("!*?[]=~:/-^", "CCTL"); 196 finish(); 197 198 fputs("\n/* syntax table used when in single quotes */\n", cfile); 199 init("sqsyntax"); 200 add_default(); 201 add("\n", "CNL"); 202 add("\\", "CSBACK"); 203 add("'", "CENDQUOTE"); 204 /* ':/' for tilde expansion, '-^]' for [a\-x] pattern ranges */ 205 add("!*?[]=~:/-^", "CCTL"); 206 finish(); 207 208 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 209 init("arisyntax"); 210 add_default(); 211 add("\n", "CNL"); 212 add("\\", "CBACK"); 213 add("`", "CBQUOTE"); 214 add("\"", "CIGN"); 215 add("$", "CVAR"); 216 add("}", "CENDVAR"); 217 add("(", "CLP"); 218 add(")", "CRP"); 219 finish(); 220 221 fputs("\n/* character classification table */\n", cfile); 222 init("is_type"); 223 add("0123456789", "ISDIGIT"); 224 add("abcdefghijklmnopqrstuvwxyz", "ISLOWER"); 225 add("ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ISUPPER"); 226 add("_", "ISUNDER"); 227 add("#?$!-*@", "ISSPECL"); 228 finish(); 229 230 exit(0); 231 } 232 233 234 /* 235 * Output the header and declaration of a syntax table. 236 */ 237 238 static void 239 init(const char *name) 240 { 241 fprintf(hfile, "extern const char %s[];\n", name); 242 fprintf(cfile, "const char %s[SYNBASE + CHAR_MAX + 1] = {\n", name); 243 } 244 245 246 static void 247 add_one(const char *key, const char *type) 248 { 249 fprintf(cfile, "\t[SYNBASE + %s] = %s,\n", key, type); 250 } 251 252 253 /* 254 * Add default values to the syntax table. 255 */ 256 257 static void 258 add_default(void) 259 { 260 add_one("PEOF", "CEOF"); 261 add_one("CTLESC", "CCTL"); 262 add_one("CTLVAR", "CCTL"); 263 add_one("CTLENDVAR", "CCTL"); 264 add_one("CTLBACKQ", "CCTL"); 265 add_one("CTLBACKQ + CTLQUOTE", "CCTL"); 266 add_one("CTLARI", "CCTL"); 267 add_one("CTLENDARI", "CCTL"); 268 add_one("CTLQUOTEMARK", "CCTL"); 269 add_one("CTLQUOTEEND", "CCTL"); 270 } 271 272 273 /* 274 * Output the footer of a syntax table. 275 */ 276 277 static void 278 finish(void) 279 { 280 fputs("};\n", cfile); 281 } 282 283 284 /* 285 * Add entries to the syntax table. 286 */ 287 288 static void 289 add(const char *p, const char *type) 290 { 291 for (; *p; ++p) { 292 char c = *p; 293 switch (c) { 294 case '\t': c = 't'; break; 295 case '\n': c = 'n'; break; 296 case '\'': c = '\''; break; 297 case '\\': c = '\\'; break; 298 299 default: 300 fprintf(cfile, "\t[SYNBASE + '%c'] = %s,\n", c, type); 301 continue; 302 } 303 fprintf(cfile, "\t[SYNBASE + '\\%c'] = %s,\n", c, type); 304 } 305 } 306 307 308 /* 309 * Output character classification macros (e.g. is_digit). If digits are 310 * contiguous, we can test for them quickly. 311 */ 312 313 static const char *macro[] = { 314 "#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)", 315 "#define is_eof(c)\t((c) == PEOF)", 316 "#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))", 317 "#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))", 318 "#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))", 319 "#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))", 320 "#define digit_val(c)\t((c) - '0')", 321 NULL 322 }; 323 324 static void 325 output_type_macros(void) 326 { 327 const char **pp; 328 329 for (pp = macro ; *pp ; pp++) 330 fprintf(hfile, "%s\n", *pp); 331 } 332