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 * $Id: mksyntax.c,v 1.5 1996/08/12 22:14:47 ache Exp $ 37 */ 38 39 #ifndef lint 40 static char copyright[] = 41 "@(#) Copyright (c) 1991, 1993\n\ 42 The Regents of the University of California. All rights reserved.\n"; 43 #endif /* not lint */ 44 45 #ifndef lint 46 static char sccsid[] = "@(#)mksyntax.c 8.2 (Berkeley) 5/4/95"; 47 #endif /* not lint */ 48 49 /* 50 * This program creates syntax.h and syntax.c. 51 */ 52 53 #include <stdio.h> 54 #include <string.h> 55 #include "parser.h" 56 57 58 struct synclass { 59 char *name; 60 char *comment; 61 }; 62 63 /* Syntax classes */ 64 struct synclass synclass[] = { 65 { "CWORD", "character is nothing special" }, 66 { "CNL", "newline character" }, 67 { "CBACK", "a backslash character" }, 68 { "CSQUOTE", "single quote" }, 69 { "CDQUOTE", "double quote" }, 70 { "CENDQUOTE", "a terminating quote" }, 71 { "CBQUOTE", "backwards single quote" }, 72 { "CVAR", "a dollar sign" }, 73 { "CENDVAR", "a '}' character" }, 74 { "CLP", "a left paren in arithmetic" }, 75 { "CRP", "a right paren in arithmetic" }, 76 { "CEOF", "end of file" }, 77 { "CCTL", "like CWORD, except it must be escaped" }, 78 { "CSPCL", "these terminate a word" }, 79 { NULL, NULL } 80 }; 81 82 83 /* 84 * Syntax classes for is_ functions. Warning: if you add new classes 85 * you may have to change the definition of the is_in_name macro. 86 */ 87 struct synclass is_entry[] = { 88 { "ISDIGIT", "a digit" }, 89 { "ISUPPER", "an upper case letter" }, 90 { "ISLOWER", "a lower case letter" }, 91 { "ISUNDER", "an underscore" }, 92 { "ISSPECL", "the name of a special parameter" }, 93 { NULL, NULL } 94 }; 95 96 static char writer[] = "\ 97 /*\n\ 98 * This file was generated by the mksyntax program.\n\ 99 */\n\ 100 \n"; 101 102 103 static FILE *cfile; 104 static FILE *hfile; 105 static char *syntax[513]; 106 static int base; 107 static int size; /* number of values which a char variable can have */ 108 static int nbits; /* number of bits in a character */ 109 static int digit_contig;/* true if digits are contiguous */ 110 111 static void filltable __P((char *)); 112 static void init __P((void)); 113 static void add __P((char *, char *)); 114 static void print __P((char *)); 115 static void output_type_macros __P((void)); 116 static void digit_convert __P((void)); 117 118 int 119 main(argc, argv) 120 int argc; 121 char **argv; 122 { 123 char c; 124 char d; 125 int sign; 126 int i; 127 char buf[80]; 128 int pos; 129 static char digit[] = "0123456789"; 130 131 /* Create output files */ 132 if ((cfile = fopen("syntax.c", "w")) == NULL) { 133 perror("syntax.c"); 134 exit(2); 135 } 136 if ((hfile = fopen("syntax.h", "w")) == NULL) { 137 perror("syntax.h"); 138 exit(2); 139 } 140 fputs(writer, hfile); 141 fputs(writer, cfile); 142 143 /* Determine the characteristics of chars. */ 144 c = -1; 145 if (c < 0) 146 sign = 1; 147 else 148 sign = 0; 149 for (nbits = 1 ; ; nbits++) { 150 d = (1 << nbits) - 1; 151 if (d == c) 152 break; 153 } 154 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits); 155 if (nbits > 9) { 156 fputs("Characters can't have more than 9 bits\n", stderr); 157 exit(2); 158 } 159 size = (1 << nbits) + 1; 160 base = 1; 161 if (sign) 162 base += 1 << (nbits - 1); 163 digit_contig = 1; 164 for (i = 0 ; i < 10 ; i++) { 165 if (digit[i] != '0' + i) 166 digit_contig = 0; 167 } 168 169 fputs("#include <ctype.h>\n", hfile); 170 fputs("#include <sys/cdefs.h>\n", hfile); 171 172 /* Generate the #define statements in the header file */ 173 fputs("/* Syntax classes */\n", hfile); 174 for (i = 0 ; synclass[i].name ; i++) { 175 sprintf(buf, "#define %s %d", synclass[i].name, i); 176 fputs(buf, hfile); 177 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 178 putc('\t', hfile); 179 fprintf(hfile, "/* %s */\n", synclass[i].comment); 180 } 181 putc('\n', hfile); 182 fputs("/* Syntax classes for is_ functions */\n", hfile); 183 for (i = 0 ; is_entry[i].name ; i++) { 184 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); 185 fputs(buf, hfile); 186 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 187 putc('\t', hfile); 188 fprintf(hfile, "/* %s */\n", is_entry[i].comment); 189 } 190 putc('\n', hfile); 191 fprintf(hfile, "#define SYNBASE %d\n", base); 192 fprintf(hfile, "#define PEOF %d\n\n", -base); 193 putc('\n', hfile); 194 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 195 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 196 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 197 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 198 putc('\n', hfile); 199 output_type_macros(); /* is_digit, etc. */ 200 putc('\n', hfile); 201 202 /* Generate the syntax tables. */ 203 fputs("#include \"shell.h\"\n", cfile); 204 fputs("#include \"syntax.h\"\n\n", cfile); 205 init(); 206 fputs("/* syntax table used when not in quotes */\n", cfile); 207 add("\n", "CNL"); 208 add("\\", "CBACK"); 209 add("'", "CSQUOTE"); 210 add("\"", "CDQUOTE"); 211 add("`", "CBQUOTE"); 212 add("$", "CVAR"); 213 add("}", "CENDVAR"); 214 add("<>();&| \t", "CSPCL"); 215 print("basesyntax"); 216 init(); 217 fputs("\n/* syntax table used when in double quotes */\n", cfile); 218 add("\n", "CNL"); 219 add("\\", "CBACK"); 220 add("\"", "CENDQUOTE"); 221 add("`", "CBQUOTE"); 222 add("$", "CVAR"); 223 add("}", "CENDVAR"); 224 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 225 add("!*?[=~:/-", "CCTL"); 226 print("dqsyntax"); 227 init(); 228 fputs("\n/* syntax table used when in single quotes */\n", cfile); 229 add("\n", "CNL"); 230 add("'", "CENDQUOTE"); 231 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 232 add("!*?[=~:/-", "CCTL"); 233 print("sqsyntax"); 234 init(); 235 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 236 add("\n", "CNL"); 237 add("\\", "CBACK"); 238 add("`", "CBQUOTE"); 239 add("'", "CSQUOTE"); 240 add("\"", "CDQUOTE"); 241 add("$", "CVAR"); 242 add("}", "CENDVAR"); 243 add("(", "CLP"); 244 add(")", "CRP"); 245 print("arisyntax"); 246 filltable("0"); 247 fputs("\n/* character classification table */\n", cfile); 248 add("0123456789", "ISDIGIT"); 249 add("abcdefghijklmnopqrstucvwxyz", "ISLOWER"); 250 add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER"); 251 add("_", "ISUNDER"); 252 add("#?$!-*@", "ISSPECL"); 253 print("is_type"); 254 if (! digit_contig) 255 digit_convert(); 256 exit(0); 257 } 258 259 260 261 /* 262 * Clear the syntax table. 263 */ 264 265 static void 266 filltable(dftval) 267 char *dftval; 268 { 269 int i; 270 271 for (i = 0 ; i < size ; i++) 272 syntax[i] = dftval; 273 } 274 275 276 /* 277 * Initialize the syntax table with default values. 278 */ 279 280 static void 281 init() 282 { 283 filltable("CWORD"); 284 syntax[0] = "CEOF"; 285 syntax[base + CTLESC] = "CCTL"; 286 syntax[base + CTLVAR] = "CCTL"; 287 syntax[base + CTLENDVAR] = "CCTL"; 288 syntax[base + CTLBACKQ] = "CCTL"; 289 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL"; 290 syntax[base + CTLARI] = "CCTL"; 291 syntax[base + CTLENDARI] = "CCTL"; 292 } 293 294 295 /* 296 * Add entries to the syntax table. 297 */ 298 299 static void 300 add(p, type) 301 char *p, *type; 302 { 303 while (*p) 304 syntax[*p++ + base] = type; 305 } 306 307 308 309 /* 310 * Output the syntax table. 311 */ 312 313 static void 314 print(name) 315 char *name; 316 { 317 int i; 318 int col; 319 320 fprintf(hfile, "extern const char %s[];\n", name); 321 fprintf(cfile, "const char %s[%d] = {\n", name, size); 322 col = 0; 323 for (i = 0 ; i < size ; i++) { 324 if (i == 0) { 325 fputs(" ", cfile); 326 } else if ((i & 03) == 0) { 327 fputs(",\n ", cfile); 328 col = 0; 329 } else { 330 putc(',', cfile); 331 while (++col < 9 * (i & 03)) 332 putc(' ', cfile); 333 } 334 fputs(syntax[i], cfile); 335 col += strlen(syntax[i]); 336 } 337 fputs("\n};\n", cfile); 338 } 339 340 341 342 /* 343 * Output character classification macros (e.g. is_digit). If digits are 344 * contiguous, we can test for them quickly. 345 */ 346 347 static char *macro[] = { 348 "#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)", 349 "#define is_alpha(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && isalpha((unsigned char) (c)))", 350 "#define is_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalpha((unsigned char) (c))))", 351 "#define is_in_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLENDARI) && ((c) == '_' || isalnum((unsigned char) (c))))", 352 "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))", 353 NULL 354 }; 355 356 static void 357 output_type_macros() 358 { 359 char **pp; 360 361 if (digit_contig) 362 macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)"; 363 for (pp = macro ; *pp ; pp++) 364 fprintf(hfile, "%s\n", *pp); 365 if (digit_contig) 366 fputs("#define digit_val(c)\t((c) - '0')\n", hfile); 367 else 368 fputs("#define digit_val(c)\t(digit_value[c])\n", hfile); 369 } 370 371 372 373 /* 374 * Output digit conversion table (if digits are not contiguous). 375 */ 376 377 static void 378 digit_convert() 379 { 380 int maxdigit; 381 static char digit[] = "0123456789"; 382 char *p; 383 int i; 384 385 maxdigit = 0; 386 for (p = digit ; *p ; p++) 387 if (*p > maxdigit) 388 maxdigit = *p; 389 fputs("extern const char digit_value[];\n", hfile); 390 fputs("\n\nconst char digit_value[] = {\n", cfile); 391 for (i = 0 ; i <= maxdigit ; i++) { 392 for (p = digit ; *p && *p != i ; p++); 393 if (*p == '\0') 394 p = digit; 395 fprintf(cfile, " %d,\n", p - digit); 396 } 397 fputs("};\n", cfile); 398 } 399