1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Kenneth Almquist. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static char const copyright[] = 39 "@(#) Copyright (c) 1991, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)mksyntax.c 8.2 (Berkeley) 5/4/95"; 46 #endif 47 static const char rcsid[] = 48 "$FreeBSD$"; 49 #endif /* not lint */ 50 51 /* 52 * This program creates syntax.h and syntax.c. 53 */ 54 55 #include <stdio.h> 56 #include <string.h> 57 #include "parser.h" 58 59 60 struct synclass { 61 char *name; 62 char *comment; 63 }; 64 65 /* Syntax classes */ 66 struct synclass synclass[] = { 67 { "CWORD", "character is nothing special" }, 68 { "CNL", "newline character" }, 69 { "CBACK", "a backslash character" }, 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 { NULL, NULL } 82 }; 83 84 85 /* 86 * Syntax classes for is_ functions. Warning: if you add new classes 87 * you may have to change the definition of the is_in_name macro. 88 */ 89 struct synclass is_entry[] = { 90 { "ISDIGIT", "a digit" }, 91 { "ISUPPER", "an upper case letter" }, 92 { "ISLOWER", "a lower case letter" }, 93 { "ISUNDER", "an underscore" }, 94 { "ISSPECL", "the name of a special parameter" }, 95 { NULL, NULL } 96 }; 97 98 static char writer[] = "\ 99 /*\n\ 100 * This file was generated by the mksyntax program.\n\ 101 */\n\ 102 \n"; 103 104 105 static FILE *cfile; 106 static FILE *hfile; 107 static char *syntax[513]; 108 static int base; 109 static int size; /* number of values which a char variable can have */ 110 static int nbits; /* number of bits in a character */ 111 static int digit_contig;/* true if digits are contiguous */ 112 113 static void filltable __P((char *)); 114 static void init __P((void)); 115 static void add __P((char *, char *)); 116 static void print __P((char *)); 117 static void output_type_macros __P((void)); 118 static void digit_convert __P((void)); 119 120 int 121 main(argc, argv) 122 int argc __unused; 123 char **argv __unused; 124 { 125 char c; 126 char d; 127 int sign; 128 int i; 129 char buf[80]; 130 int pos; 131 static char digit[] = "0123456789"; 132 133 /* Create output files */ 134 if ((cfile = fopen("syntax.c", "w")) == NULL) { 135 perror("syntax.c"); 136 exit(2); 137 } 138 if ((hfile = fopen("syntax.h", "w")) == NULL) { 139 perror("syntax.h"); 140 exit(2); 141 } 142 fputs(writer, hfile); 143 fputs(writer, cfile); 144 145 /* Determine the characteristics of chars. */ 146 c = -1; 147 if (c < 0) 148 sign = 1; 149 else 150 sign = 0; 151 for (nbits = 1 ; ; nbits++) { 152 d = (1 << nbits) - 1; 153 if (d == c) 154 break; 155 } 156 #if 0 157 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits); 158 #endif 159 if (nbits > 9) { 160 fputs("Characters can't have more than 9 bits\n", stderr); 161 exit(2); 162 } 163 size = (1 << nbits) + 1; 164 base = 1; 165 if (sign) 166 base += 1 << (nbits - 1); 167 digit_contig = 1; 168 for (i = 0 ; i < 10 ; i++) { 169 if (digit[i] != '0' + i) 170 digit_contig = 0; 171 } 172 173 fputs("#include <sys/cdefs.h>\n", hfile); 174 fputs("#include <ctype.h>\n", hfile); 175 176 /* Generate the #define statements in the header file */ 177 fputs("/* Syntax classes */\n", hfile); 178 for (i = 0 ; synclass[i].name ; i++) { 179 sprintf(buf, "#define %s %d", synclass[i].name, i); 180 fputs(buf, hfile); 181 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 182 putc('\t', hfile); 183 fprintf(hfile, "/* %s */\n", synclass[i].comment); 184 } 185 putc('\n', hfile); 186 fputs("/* Syntax classes for is_ functions */\n", hfile); 187 for (i = 0 ; is_entry[i].name ; i++) { 188 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); 189 fputs(buf, hfile); 190 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 191 putc('\t', hfile); 192 fprintf(hfile, "/* %s */\n", is_entry[i].comment); 193 } 194 putc('\n', hfile); 195 fprintf(hfile, "#define SYNBASE %d\n", base); 196 fprintf(hfile, "#define PEOF %d\n\n", -base); 197 putc('\n', hfile); 198 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 199 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 200 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 201 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 202 putc('\n', hfile); 203 output_type_macros(); /* is_digit, etc. */ 204 putc('\n', hfile); 205 206 /* Generate the syntax tables. */ 207 fputs("#include \"shell.h\"\n", cfile); 208 fputs("#include \"syntax.h\"\n\n", cfile); 209 init(); 210 fputs("/* syntax table used when not in quotes */\n", cfile); 211 add("\n", "CNL"); 212 add("\\", "CBACK"); 213 add("'", "CSQUOTE"); 214 add("\"", "CDQUOTE"); 215 add("`", "CBQUOTE"); 216 add("$", "CVAR"); 217 add("}", "CENDVAR"); 218 add("<>();&| \t", "CSPCL"); 219 print("basesyntax"); 220 init(); 221 fputs("\n/* syntax table used when in double quotes */\n", cfile); 222 add("\n", "CNL"); 223 add("\\", "CBACK"); 224 add("\"", "CENDQUOTE"); 225 add("`", "CBQUOTE"); 226 add("$", "CVAR"); 227 add("}", "CENDVAR"); 228 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 229 add("!*?[=~:/-", "CCTL"); 230 print("dqsyntax"); 231 init(); 232 fputs("\n/* syntax table used when in single quotes */\n", cfile); 233 add("\n", "CNL"); 234 add("'", "CENDQUOTE"); 235 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 236 add("!*?[=~:/-", "CCTL"); 237 print("sqsyntax"); 238 init(); 239 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 240 add("\n", "CNL"); 241 add("\\", "CBACK"); 242 add("`", "CBQUOTE"); 243 add("'", "CSQUOTE"); 244 add("\"", "CDQUOTE"); 245 add("$", "CVAR"); 246 add("}", "CENDVAR"); 247 add("(", "CLP"); 248 add(")", "CRP"); 249 print("arisyntax"); 250 filltable("0"); 251 fputs("\n/* character classification table */\n", cfile); 252 add("0123456789", "ISDIGIT"); 253 add("abcdefghijklmnopqrstucvwxyz", "ISLOWER"); 254 add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER"); 255 add("_", "ISUNDER"); 256 add("#?$!-*@", "ISSPECL"); 257 print("is_type"); 258 if (! digit_contig) 259 digit_convert(); 260 exit(0); 261 } 262 263 264 265 /* 266 * Clear the syntax table. 267 */ 268 269 static void 270 filltable(dftval) 271 char *dftval; 272 { 273 int i; 274 275 for (i = 0 ; i < size ; i++) 276 syntax[i] = dftval; 277 } 278 279 280 /* 281 * Initialize the syntax table with default values. 282 */ 283 284 static void 285 init() 286 { 287 filltable("CWORD"); 288 syntax[0] = "CEOF"; 289 syntax[base + CTLESC] = "CCTL"; 290 syntax[base + CTLVAR] = "CCTL"; 291 syntax[base + CTLENDVAR] = "CCTL"; 292 syntax[base + CTLBACKQ] = "CCTL"; 293 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL"; 294 syntax[base + CTLARI] = "CCTL"; 295 syntax[base + CTLENDARI] = "CCTL"; 296 syntax[base + CTLQUOTEMARK] = "CCTL"; 297 } 298 299 300 /* 301 * Add entries to the syntax table. 302 */ 303 304 static void 305 add(p, type) 306 char *p, *type; 307 { 308 while (*p) 309 syntax[*p++ + base] = type; 310 } 311 312 313 314 /* 315 * Output the syntax table. 316 */ 317 318 static void 319 print(name) 320 char *name; 321 { 322 int i; 323 int col; 324 325 fprintf(hfile, "extern const char %s[];\n", name); 326 fprintf(cfile, "const char %s[%d] = {\n", name, size); 327 col = 0; 328 for (i = 0 ; i < size ; i++) { 329 if (i == 0) { 330 fputs(" ", cfile); 331 } else if ((i & 03) == 0) { 332 fputs(",\n ", cfile); 333 col = 0; 334 } else { 335 putc(',', cfile); 336 while (++col < 9 * (i & 03)) 337 putc(' ', cfile); 338 } 339 fputs(syntax[i], cfile); 340 col += strlen(syntax[i]); 341 } 342 fputs("\n};\n", cfile); 343 } 344 345 346 347 /* 348 * Output character classification macros (e.g. is_digit). If digits are 349 * contiguous, we can test for them quickly. 350 */ 351 352 static char *macro[] = { 353 "#define is_digit(c)\t((c >= 0 && is_type+SYNBASE)[c] & ISDIGIT)", 354 "#define is_alpha(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && isalpha((unsigned char) (c)))", 355 "#define is_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalpha((unsigned char) (c))))", 356 "#define is_in_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalnum((unsigned char) (c))))", 357 "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))", 358 NULL 359 }; 360 361 static void 362 output_type_macros() 363 { 364 char **pp; 365 366 if (digit_contig) 367 macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)"; 368 for (pp = macro ; *pp ; pp++) 369 fprintf(hfile, "%s\n", *pp); 370 if (digit_contig) 371 fputs("#define digit_val(c)\t((c) - '0')\n", hfile); 372 else 373 fputs("#define digit_val(c)\t(digit_value[c])\n", hfile); 374 } 375 376 377 378 /* 379 * Output digit conversion table (if digits are not contiguous). 380 */ 381 382 static void 383 digit_convert() 384 { 385 int maxdigit; 386 static char digit[] = "0123456789"; 387 char *p; 388 int i; 389 390 maxdigit = 0; 391 for (p = digit ; *p ; p++) 392 if (*p > maxdigit) 393 maxdigit = *p; 394 fputs("extern const char digit_value[];\n", hfile); 395 fputs("\n\nconst char digit_value[] = {\n", cfile); 396 for (i = 0 ; i <= maxdigit ; i++) { 397 for (p = digit ; *p && *p != i ; p++); 398 if (*p == '\0') 399 p = digit; 400 fprintf(cfile, " %d,\n", p - digit); 401 } 402 fputs("};\n", cfile); 403 } 404