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 const char *name; 59 const 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 const 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(const char *); 111 static void init(void); 112 static void add(const char *, const char *); 113 static void print(const 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 sign = (c > 0) ? 0 : 1; 143 for (nbits = 1 ; ; nbits++) { 144 d = (1 << nbits) - 1; 145 if (d == c) 146 break; 147 } 148 #if 0 149 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits); 150 #endif 151 if (nbits > 9) { 152 fputs("Characters can't have more than 9 bits\n", stderr); 153 exit(2); 154 } 155 size = (1 << nbits) + 1; 156 base = 1; 157 if (sign) 158 base += 1 << (nbits - 1); 159 digit_contig = 1; 160 for (i = 0 ; i < 10 ; i++) { 161 if (digit[i] != '0' + i) 162 digit_contig = 0; 163 } 164 165 fputs("#include <sys/cdefs.h>\n", hfile); 166 fputs("#include <ctype.h>\n", hfile); 167 168 /* Generate the #define statements in the header file */ 169 fputs("/* Syntax classes */\n", hfile); 170 for (i = 0 ; synclass[i].name ; i++) { 171 sprintf(buf, "#define %s %d", synclass[i].name, i); 172 fputs(buf, hfile); 173 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 174 putc('\t', hfile); 175 fprintf(hfile, "/* %s */\n", synclass[i].comment); 176 } 177 putc('\n', hfile); 178 fputs("/* Syntax classes for is_ functions */\n", hfile); 179 for (i = 0 ; is_entry[i].name ; i++) { 180 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); 181 fputs(buf, hfile); 182 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 183 putc('\t', hfile); 184 fprintf(hfile, "/* %s */\n", is_entry[i].comment); 185 } 186 putc('\n', hfile); 187 fprintf(hfile, "#define SYNBASE %d\n", base); 188 fprintf(hfile, "#define PEOF %d\n\n", -base); 189 putc('\n', hfile); 190 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 191 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 192 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 193 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 194 putc('\n', hfile); 195 output_type_macros(); /* is_digit, etc. */ 196 putc('\n', hfile); 197 198 /* Generate the syntax tables. */ 199 fputs("#include \"shell.h\"\n", cfile); 200 fputs("#include \"syntax.h\"\n\n", cfile); 201 init(); 202 fputs("/* syntax table used when not in quotes */\n", cfile); 203 add("\n", "CNL"); 204 add("\\", "CBACK"); 205 add("'", "CSQUOTE"); 206 add("\"", "CDQUOTE"); 207 add("`", "CBQUOTE"); 208 add("$", "CVAR"); 209 add("}", "CENDVAR"); 210 add("<>();&| \t", "CSPCL"); 211 print("basesyntax"); 212 init(); 213 fputs("\n/* syntax table used when in double quotes */\n", cfile); 214 add("\n", "CNL"); 215 add("\\", "CBACK"); 216 add("\"", "CENDQUOTE"); 217 add("`", "CBQUOTE"); 218 add("$", "CVAR"); 219 add("}", "CENDVAR"); 220 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 221 add("!*?[=~:/-", "CCTL"); 222 print("dqsyntax"); 223 init(); 224 fputs("\n/* syntax table used when in single quotes */\n", cfile); 225 add("\n", "CNL"); 226 add("'", "CENDQUOTE"); 227 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 228 add("!*?[=~:/-", "CCTL"); 229 print("sqsyntax"); 230 init(); 231 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 232 add("\n", "CNL"); 233 add("\\", "CBACK"); 234 add("`", "CBQUOTE"); 235 add("\"", "CDQUOTE"); 236 add("$", "CVAR"); 237 add("}", "CENDVAR"); 238 add("(", "CLP"); 239 add(")", "CRP"); 240 print("arisyntax"); 241 filltable("0"); 242 fputs("\n/* character classification table */\n", cfile); 243 add("0123456789", "ISDIGIT"); 244 add("abcdefghijklmnopqrstucvwxyz", "ISLOWER"); 245 add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER"); 246 add("_", "ISUNDER"); 247 add("#?$!-*@", "ISSPECL"); 248 print("is_type"); 249 if (! digit_contig) 250 digit_convert(); 251 exit(0); 252 } 253 254 255 256 /* 257 * Clear the syntax table. 258 */ 259 260 static void 261 filltable(const char *dftval) 262 { 263 int i; 264 265 for (i = 0 ; i < size ; i++) 266 syntax[i] = dftval; 267 } 268 269 270 /* 271 * Initialize the syntax table with default values. 272 */ 273 274 static void 275 init(void) 276 { 277 filltable("CWORD"); 278 syntax[0] = "CEOF"; 279 syntax[base + CTLESC] = "CCTL"; 280 syntax[base + CTLVAR] = "CCTL"; 281 syntax[base + CTLENDVAR] = "CCTL"; 282 syntax[base + CTLBACKQ] = "CCTL"; 283 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL"; 284 syntax[base + CTLARI] = "CCTL"; 285 syntax[base + CTLENDARI] = "CCTL"; 286 syntax[base + CTLQUOTEMARK] = "CCTL"; 287 } 288 289 290 /* 291 * Add entries to the syntax table. 292 */ 293 294 static void 295 add(const char *p, const char *type) 296 { 297 while (*p) 298 syntax[*p++ + base] = type; 299 } 300 301 302 303 /* 304 * Output the syntax table. 305 */ 306 307 static void 308 print(const char *name) 309 { 310 int i; 311 int col; 312 313 fprintf(hfile, "extern const char %s[];\n", name); 314 fprintf(cfile, "const char %s[%d] = {\n", name, size); 315 col = 0; 316 for (i = 0 ; i < size ; i++) { 317 if (i == 0) { 318 fputs(" ", cfile); 319 } else if ((i & 03) == 0) { 320 fputs(",\n ", cfile); 321 col = 0; 322 } else { 323 putc(',', cfile); 324 while (++col < 9 * (i & 03)) 325 putc(' ', cfile); 326 } 327 fputs(syntax[i], cfile); 328 col += strlen(syntax[i]); 329 } 330 fputs("\n};\n", cfile); 331 } 332 333 334 335 /* 336 * Output character classification macros (e.g. is_digit). If digits are 337 * contiguous, we can test for them quickly. 338 */ 339 340 static const char *macro[] = { 341 "#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)", 342 "#define is_eof(c)\t((c) == PEOF)", 343 "#define is_alpha(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && isalpha((unsigned char) (c)))", 344 "#define is_name(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && ((c) == '_' || isalpha((unsigned char) (c))))", 345 "#define is_in_name(c)\t(((c) < CTLESC || (c) > CTLQUOTEMARK) && ((c) == '_' || isalnum((unsigned char) (c))))", 346 "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))", 347 NULL 348 }; 349 350 static void 351 output_type_macros(void) 352 { 353 const char **pp; 354 355 if (digit_contig) 356 macro[0] = "#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)"; 357 for (pp = macro ; *pp ; pp++) 358 fprintf(hfile, "%s\n", *pp); 359 if (digit_contig) 360 fputs("#define digit_val(c)\t((c) - '0')\n", hfile); 361 else 362 fputs("#define digit_val(c)\t(digit_value[c])\n", hfile); 363 } 364 365 366 367 /* 368 * Output digit conversion table (if digits are not contiguous). 369 */ 370 371 static void 372 digit_convert(void) 373 { 374 int maxdigit; 375 static char digit[] = "0123456789"; 376 char *p; 377 int i; 378 379 maxdigit = 0; 380 for (p = digit ; *p ; p++) 381 if (*p > maxdigit) 382 maxdigit = *p; 383 fputs("extern const char digit_value[];\n", hfile); 384 fputs("\n\nconst char digit_value[] = {\n", cfile); 385 for (i = 0 ; i <= maxdigit ; i++) { 386 for (p = digit ; *p && *p != i ; p++); 387 if (*p == '\0') 388 p = digit; 389 fprintf(cfile, " %d,\n", (int)(p - digit)); 390 } 391 fputs("};\n", cfile); 392 } 393