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 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #if 0 34 #ifndef lint 35 static char const copyright[] = 36 "@(#) Copyright (c) 1991, 1993\n\ 37 The Regents of the University of California. All rights reserved.\n"; 38 #endif /* not lint */ 39 40 #ifndef lint 41 static char sccsid[] = "@(#)mksyntax.c 8.2 (Berkeley) 5/4/95"; 42 #endif /* not lint */ 43 #endif 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 /* 48 * This program creates syntax.h and syntax.c. 49 */ 50 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include "parser.h" 55 56 57 struct synclass { 58 char *name; 59 char *comment; 60 }; 61 62 /* Syntax classes */ 63 struct synclass synclass[] = { 64 { "CWORD", "character is nothing special" }, 65 { "CNL", "newline character" }, 66 { "CBACK", "a backslash character" }, 67 { "CSQUOTE", "single quote" }, 68 { "CDQUOTE", "double quote" }, 69 { "CENDQUOTE", "a terminating quote" }, 70 { "CBQUOTE", "backwards single quote" }, 71 { "CVAR", "a dollar sign" }, 72 { "CENDVAR", "a '}' character" }, 73 { "CLP", "a left paren in arithmetic" }, 74 { "CRP", "a right paren in arithmetic" }, 75 { "CEOF", "end of file" }, 76 { "CCTL", "like CWORD, except it must be escaped" }, 77 { "CSPCL", "these terminate a word" }, 78 { NULL, NULL } 79 }; 80 81 82 /* 83 * Syntax classes for is_ functions. Warning: if you add new classes 84 * you may have to change the definition of the is_in_name macro. 85 */ 86 struct synclass is_entry[] = { 87 { "ISDIGIT", "a digit" }, 88 { "ISUPPER", "an upper case letter" }, 89 { "ISLOWER", "a lower case letter" }, 90 { "ISUNDER", "an underscore" }, 91 { "ISSPECL", "the name of a special parameter" }, 92 { NULL, NULL } 93 }; 94 95 static char writer[] = "\ 96 /*\n\ 97 * This file was generated by the mksyntax program.\n\ 98 */\n\ 99 \n"; 100 101 102 static FILE *cfile; 103 static FILE *hfile; 104 static char *syntax[513]; 105 static int base; 106 static int size; /* number of values which a char variable can have */ 107 static int nbits; /* number of bits in a character */ 108 static int digit_contig;/* true if digits are contiguous */ 109 110 static void filltable(char *); 111 static void init(void); 112 static void add(char *, char *); 113 static void print(char *); 114 static void output_type_macros(void); 115 static void digit_convert(void); 116 117 int 118 main(int argc __unused, char **argv __unused) 119 { 120 char c; 121 char d; 122 int sign; 123 int i; 124 char buf[80]; 125 int pos; 126 static char digit[] = "0123456789"; 127 128 /* Create output files */ 129 if ((cfile = fopen("syntax.c", "w")) == NULL) { 130 perror("syntax.c"); 131 exit(2); 132 } 133 if ((hfile = fopen("syntax.h", "w")) == NULL) { 134 perror("syntax.h"); 135 exit(2); 136 } 137 fputs(writer, hfile); 138 fputs(writer, cfile); 139 140 /* Determine the characteristics of chars. */ 141 c = -1; 142 if (c < 0) 143 sign = 1; 144 else 145 sign = 0; 146 for (nbits = 1 ; ; nbits++) { 147 d = (1 << nbits) - 1; 148 if (d == c) 149 break; 150 } 151 #if 0 152 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits); 153 #endif 154 if (nbits > 9) { 155 fputs("Characters can't have more than 9 bits\n", stderr); 156 exit(2); 157 } 158 size = (1 << nbits) + 1; 159 base = 1; 160 if (sign) 161 base += 1 << (nbits - 1); 162 digit_contig = 1; 163 for (i = 0 ; i < 10 ; i++) { 164 if (digit[i] != '0' + i) 165 digit_contig = 0; 166 } 167 168 fputs("#include <sys/cdefs.h>\n", hfile); 169 fputs("#include <ctype.h>\n", hfile); 170 171 /* Generate the #define statements in the header file */ 172 fputs("/* Syntax classes */\n", hfile); 173 for (i = 0 ; synclass[i].name ; i++) { 174 sprintf(buf, "#define %s %d", synclass[i].name, i); 175 fputs(buf, hfile); 176 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 177 putc('\t', hfile); 178 fprintf(hfile, "/* %s */\n", synclass[i].comment); 179 } 180 putc('\n', hfile); 181 fputs("/* Syntax classes for is_ functions */\n", hfile); 182 for (i = 0 ; is_entry[i].name ; i++) { 183 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); 184 fputs(buf, hfile); 185 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 186 putc('\t', hfile); 187 fprintf(hfile, "/* %s */\n", is_entry[i].comment); 188 } 189 putc('\n', hfile); 190 fprintf(hfile, "#define SYNBASE %d\n", base); 191 fprintf(hfile, "#define PEOF %d\n\n", -base); 192 putc('\n', hfile); 193 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 194 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 195 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 196 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 197 putc('\n', hfile); 198 output_type_macros(); /* is_digit, etc. */ 199 putc('\n', hfile); 200 201 /* Generate the syntax tables. */ 202 fputs("#include \"shell.h\"\n", cfile); 203 fputs("#include \"syntax.h\"\n\n", cfile); 204 init(); 205 fputs("/* syntax table used when not in quotes */\n", cfile); 206 add("\n", "CNL"); 207 add("\\", "CBACK"); 208 add("'", "CSQUOTE"); 209 add("\"", "CDQUOTE"); 210 add("`", "CBQUOTE"); 211 add("$", "CVAR"); 212 add("}", "CENDVAR"); 213 add("<>();&| \t", "CSPCL"); 214 print("basesyntax"); 215 init(); 216 fputs("\n/* syntax table used when in double quotes */\n", cfile); 217 add("\n", "CNL"); 218 add("\\", "CBACK"); 219 add("\"", "CENDQUOTE"); 220 add("`", "CBQUOTE"); 221 add("$", "CVAR"); 222 add("}", "CENDVAR"); 223 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 224 add("!*?[=~:/-", "CCTL"); 225 print("dqsyntax"); 226 init(); 227 fputs("\n/* syntax table used when in single quotes */\n", cfile); 228 add("\n", "CNL"); 229 add("'", "CENDQUOTE"); 230 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 231 add("!*?[=~:/-", "CCTL"); 232 print("sqsyntax"); 233 init(); 234 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 235 add("\n", "CNL"); 236 add("\\", "CBACK"); 237 add("`", "CBQUOTE"); 238 add("'", "CSQUOTE"); 239 add("\"", "CDQUOTE"); 240 add("$", "CVAR"); 241 add("}", "CENDVAR"); 242 add("(", "CLP"); 243 add(")", "CRP"); 244 print("arisyntax"); 245 filltable("0"); 246 fputs("\n/* character classification table */\n", cfile); 247 add("0123456789", "ISDIGIT"); 248 add("abcdefghijklmnopqrstucvwxyz", "ISLOWER"); 249 add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER"); 250 add("_", "ISUNDER"); 251 add("#?$!-*@", "ISSPECL"); 252 print("is_type"); 253 if (! digit_contig) 254 digit_convert(); 255 exit(0); 256 } 257 258 259 260 /* 261 * Clear the syntax table. 262 */ 263 264 static void 265 filltable(char *dftval) 266 { 267 int i; 268 269 for (i = 0 ; i < size ; i++) 270 syntax[i] = dftval; 271 } 272 273 274 /* 275 * Initialize the syntax table with default values. 276 */ 277 278 static void 279 init(void) 280 { 281 filltable("CWORD"); 282 syntax[0] = "CEOF"; 283 syntax[base + CTLESC] = "CCTL"; 284 syntax[base + CTLVAR] = "CCTL"; 285 syntax[base + CTLENDVAR] = "CCTL"; 286 syntax[base + CTLBACKQ] = "CCTL"; 287 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL"; 288 syntax[base + CTLARI] = "CCTL"; 289 syntax[base + CTLENDARI] = "CCTL"; 290 syntax[base + CTLQUOTEMARK] = "CCTL"; 291 } 292 293 294 /* 295 * Add entries to the syntax table. 296 */ 297 298 static void 299 add(char *p, char *type) 300 { 301 while (*p) 302 syntax[*p++ + base] = type; 303 } 304 305 306 307 /* 308 * Output the syntax table. 309 */ 310 311 static void 312 print(char *name) 313 { 314 int i; 315 int col; 316 317 fprintf(hfile, "extern const char %s[];\n", name); 318 fprintf(cfile, "const char %s[%d] = {\n", name, size); 319 col = 0; 320 for (i = 0 ; i < size ; i++) { 321 if (i == 0) { 322 fputs(" ", cfile); 323 } else if ((i & 03) == 0) { 324 fputs(",\n ", cfile); 325 col = 0; 326 } else { 327 putc(',', cfile); 328 while (++col < 9 * (i & 03)) 329 putc(' ', cfile); 330 } 331 fputs(syntax[i], cfile); 332 col += strlen(syntax[i]); 333 } 334 fputs("\n};\n", cfile); 335 } 336 337 338 339 /* 340 * Output character classification macros (e.g. is_digit). If digits are 341 * contiguous, we can test for them quickly. 342 */ 343 344 static char *macro[] = { 345 "#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)", 346 "#define is_eof(c)\t((c) == PEOF)", 347 "#define is_alpha(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && isalpha((unsigned char) (c)))", 348 "#define is_name(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && ((c) == '_' || isalpha((unsigned char) (c))))", 349 "#define is_in_name(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && ((c) == '_' || isalnum((unsigned char) (c))))", 350 "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))", 351 NULL 352 }; 353 354 static void 355 output_type_macros(void) 356 { 357 char **pp; 358 359 if (digit_contig) 360 macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)"; 361 for (pp = macro ; *pp ; pp++) 362 fprintf(hfile, "%s\n", *pp); 363 if (digit_contig) 364 fputs("#define digit_val(c)\t((c) - '0')\n", hfile); 365 else 366 fputs("#define digit_val(c)\t(digit_value[c])\n", hfile); 367 } 368 369 370 371 /* 372 * Output digit conversion table (if digits are not contiguous). 373 */ 374 375 static void 376 digit_convert(void) 377 { 378 int maxdigit; 379 static char digit[] = "0123456789"; 380 char *p; 381 int i; 382 383 maxdigit = 0; 384 for (p = digit ; *p ; p++) 385 if (*p > maxdigit) 386 maxdigit = *p; 387 fputs("extern const char digit_value[];\n", hfile); 388 fputs("\n\nconst char digit_value[] = {\n", cfile); 389 for (i = 0 ; i <= maxdigit ; i++) { 390 for (p = digit ; *p && *p != i ; p++); 391 if (*p == '\0') 392 p = digit; 393 fprintf(cfile, " %d,\n", (int)(p - digit)); 394 } 395 fputs("};\n", cfile); 396 } 397