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 #endif /* not lint */ 48 #include <sys/cdefs.h> 49 __FBSDID("$FreeBSD: src/bin/sh/mksyntax.c,v 1.14.2.3 2002/07/19 04:38:51 tjr Exp $"); 50 51 /* 52 * This program creates syntax.h and syntax.c. 53 */ 54 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include "parser.h" 59 60 61 struct synclass { 62 char *name; 63 char *comment; 64 }; 65 66 /* Syntax classes */ 67 struct synclass synclass[] = { 68 { "CWORD", "character is nothing special" }, 69 { "CNL", "newline character" }, 70 { "CBACK", "a backslash character" }, 71 { "CSQUOTE", "single quote" }, 72 { "CDQUOTE", "double quote" }, 73 { "CENDQUOTE", "a terminating quote" }, 74 { "CBQUOTE", "backwards single quote" }, 75 { "CVAR", "a dollar sign" }, 76 { "CENDVAR", "a '}' character" }, 77 { "CLP", "a left paren in arithmetic" }, 78 { "CRP", "a right paren in arithmetic" }, 79 { "CEOF", "end of file" }, 80 { "CCTL", "like CWORD, except it must be escaped" }, 81 { "CSPCL", "these terminate a word" }, 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 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 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 static char *syntax[513]; 109 static int base; 110 static int size; /* number of values which a char variable can have */ 111 static int nbits; /* number of bits in a character */ 112 static int digit_contig;/* true if digits are contiguous */ 113 114 static void filltable(char *); 115 static void init(void); 116 static void add(char *, char *); 117 static void print(char *); 118 static void output_type_macros(void); 119 static void digit_convert(void); 120 121 int 122 main(int argc __unused, char **argv __unused) 123 { 124 char c; 125 char d; 126 int sign; 127 int i; 128 char buf[80]; 129 int pos; 130 static char digit[] = "0123456789"; 131 132 /* Create output files */ 133 if ((cfile = fopen("syntax.c", "w")) == NULL) { 134 perror("syntax.c"); 135 exit(2); 136 } 137 if ((hfile = fopen("syntax.h", "w")) == NULL) { 138 perror("syntax.h"); 139 exit(2); 140 } 141 fputs(writer, hfile); 142 fputs(writer, cfile); 143 144 /* Determine the characteristics of chars. */ 145 c = -1; 146 if (c < 0) 147 sign = 1; 148 else 149 sign = 0; 150 for (nbits = 1 ; ; nbits++) { 151 d = (1 << nbits) - 1; 152 if (d == c) 153 break; 154 } 155 #if 0 156 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits); 157 #endif 158 if (nbits > 9) { 159 fputs("Characters can't have more than 9 bits\n", stderr); 160 exit(2); 161 } 162 size = (1 << nbits) + 1; 163 base = 1; 164 if (sign) 165 base += 1 << (nbits - 1); 166 digit_contig = 1; 167 for (i = 0 ; i < 10 ; i++) { 168 if (digit[i] != '0' + i) 169 digit_contig = 0; 170 } 171 172 fputs("#include <sys/cdefs.h>\n", hfile); 173 fputs("#include <ctype.h>\n", hfile); 174 175 /* Generate the #define statements in the header file */ 176 fputs("/* Syntax classes */\n", hfile); 177 for (i = 0 ; synclass[i].name ; i++) { 178 sprintf(buf, "#define %s %d", synclass[i].name, i); 179 fputs(buf, hfile); 180 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 181 putc('\t', hfile); 182 fprintf(hfile, "/* %s */\n", synclass[i].comment); 183 } 184 putc('\n', hfile); 185 fputs("/* Syntax classes for is_ functions */\n", hfile); 186 for (i = 0 ; is_entry[i].name ; i++) { 187 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); 188 fputs(buf, hfile); 189 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 190 putc('\t', hfile); 191 fprintf(hfile, "/* %s */\n", is_entry[i].comment); 192 } 193 putc('\n', hfile); 194 fprintf(hfile, "#define SYNBASE %d\n", base); 195 fprintf(hfile, "#define PEOF %d\n\n", -base); 196 putc('\n', hfile); 197 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 198 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 199 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 200 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 201 putc('\n', hfile); 202 output_type_macros(); /* is_digit, etc. */ 203 putc('\n', hfile); 204 205 /* Generate the syntax tables. */ 206 fputs("#include \"shell.h\"\n", cfile); 207 fputs("#include \"syntax.h\"\n\n", cfile); 208 init(); 209 fputs("/* syntax table used when not in quotes */\n", cfile); 210 add("\n", "CNL"); 211 add("\\", "CBACK"); 212 add("'", "CSQUOTE"); 213 add("\"", "CDQUOTE"); 214 add("`", "CBQUOTE"); 215 add("$", "CVAR"); 216 add("}", "CENDVAR"); 217 add("<>();&| \t", "CSPCL"); 218 print("basesyntax"); 219 init(); 220 fputs("\n/* syntax table used when in double quotes */\n", cfile); 221 add("\n", "CNL"); 222 add("\\", "CBACK"); 223 add("\"", "CENDQUOTE"); 224 add("`", "CBQUOTE"); 225 add("$", "CVAR"); 226 add("}", "CENDVAR"); 227 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 228 add("!*?[=~:/-", "CCTL"); 229 print("dqsyntax"); 230 init(); 231 fputs("\n/* syntax table used when in single quotes */\n", cfile); 232 add("\n", "CNL"); 233 add("'", "CENDQUOTE"); 234 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 235 add("!*?[=~:/-", "CCTL"); 236 print("sqsyntax"); 237 init(); 238 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 239 add("\n", "CNL"); 240 add("\\", "CBACK"); 241 add("`", "CBQUOTE"); 242 add("'", "CSQUOTE"); 243 add("\"", "CDQUOTE"); 244 add("$", "CVAR"); 245 add("}", "CENDVAR"); 246 add("(", "CLP"); 247 add(")", "CRP"); 248 print("arisyntax"); 249 filltable("0"); 250 fputs("\n/* character classification table */\n", cfile); 251 add("0123456789", "ISDIGIT"); 252 add("abcdefghijklmnopqrstucvwxyz", "ISLOWER"); 253 add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER"); 254 add("_", "ISUNDER"); 255 add("#?$!-*@", "ISSPECL"); 256 print("is_type"); 257 if (! digit_contig) 258 digit_convert(); 259 exit(0); 260 } 261 262 263 264 /* 265 * Clear the syntax table. 266 */ 267 268 static void 269 filltable(char *dftval) 270 { 271 int i; 272 273 for (i = 0 ; i < size ; i++) 274 syntax[i] = dftval; 275 } 276 277 278 /* 279 * Initialize the syntax table with default values. 280 */ 281 282 static void 283 init(void) 284 { 285 filltable("CWORD"); 286 syntax[0] = "CEOF"; 287 syntax[base + CTLESC] = "CCTL"; 288 syntax[base + CTLVAR] = "CCTL"; 289 syntax[base + CTLENDVAR] = "CCTL"; 290 syntax[base + CTLBACKQ] = "CCTL"; 291 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL"; 292 syntax[base + CTLARI] = "CCTL"; 293 syntax[base + CTLENDARI] = "CCTL"; 294 syntax[base + CTLQUOTEMARK] = "CCTL"; 295 } 296 297 298 /* 299 * Add entries to the syntax table. 300 */ 301 302 static void 303 add(char *p, char *type) 304 { 305 while (*p) 306 syntax[*p++ + base] = type; 307 } 308 309 310 311 /* 312 * Output the syntax table. 313 */ 314 315 static void 316 print(char *name) 317 { 318 int i; 319 int col; 320 321 fprintf(hfile, "extern const char %s[];\n", name); 322 fprintf(cfile, "const char %s[%d] = {\n", name, size); 323 col = 0; 324 for (i = 0 ; i < size ; i++) { 325 if (i == 0) { 326 fputs(" ", cfile); 327 } else if ((i & 03) == 0) { 328 fputs(",\n ", cfile); 329 col = 0; 330 } else { 331 putc(',', cfile); 332 while (++col < 9 * (i & 03)) 333 putc(' ', cfile); 334 } 335 fputs(syntax[i], cfile); 336 col += strlen(syntax[i]); 337 } 338 fputs("\n};\n", cfile); 339 } 340 341 342 343 /* 344 * Output character classification macros (e.g. is_digit). If digits are 345 * contiguous, we can test for them quickly. 346 */ 347 348 static char *macro[] = { 349 "#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)", 350 "#define is_alpha(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLQUOTEMARK) && isalpha((unsigned char) (c)))", 351 "#define is_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLQUOTEMARK) && ((c) == '_' || isalpha((unsigned char) (c))))", 352 "#define is_in_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLQUOTEMARK) && ((c) == '_' || isalnum((unsigned char) (c))))", 353 "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))", 354 NULL 355 }; 356 357 static void 358 output_type_macros(void) 359 { 360 char **pp; 361 362 if (digit_contig) 363 macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)"; 364 for (pp = macro ; *pp ; pp++) 365 fprintf(hfile, "%s\n", *pp); 366 if (digit_contig) 367 fputs("#define digit_val(c)\t((c) - '0')\n", hfile); 368 else 369 fputs("#define digit_val(c)\t(digit_value[c])\n", hfile); 370 } 371 372 373 374 /* 375 * Output digit conversion table (if digits are not contiguous). 376 */ 377 378 static void 379 digit_convert(void) 380 { 381 int maxdigit; 382 static char digit[] = "0123456789"; 383 char *p; 384 int i; 385 386 maxdigit = 0; 387 for (p = digit ; *p ; p++) 388 if (*p > maxdigit) 389 maxdigit = *p; 390 fputs("extern const char digit_value[];\n", hfile); 391 fputs("\n\nconst char digit_value[] = {\n", cfile); 392 for (i = 0 ; i <= maxdigit ; i++) { 393 for (p = digit ; *p && *p != i ; p++); 394 if (*p == '\0') 395 p = digit; 396 fprintf(cfile, " %d,\n", p - digit); 397 } 398 fputs("};\n", cfile); 399 } 400