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 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved. 37 * @(#)mksyntax.c 8.2 (Berkeley) 5/4/95 38 * $FreeBSD: src/bin/sh/mksyntax.c,v 1.14.2.3 2002/07/19 04:38:51 tjr Exp $ 39 * $DragonFly: src/bin/sh/mksyntax.c,v 1.3 2004/03/19 18:39:41 cpressey Exp $ 40 */ 41 42 /* 43 * This program creates syntax.h and syntax.c. 44 */ 45 46 #include <stdio.h> 47 #include <stdlib.h> 48 #include <string.h> 49 #include "parser.h" 50 51 52 struct synclass { 53 const char *name; 54 const char *comment; 55 }; 56 57 /* Syntax classes */ 58 struct synclass synclass[] = { 59 { "CWORD", "character is nothing special" }, 60 { "CNL", "newline character" }, 61 { "CBACK", "a backslash character" }, 62 { "CSQUOTE", "single quote" }, 63 { "CDQUOTE", "double quote" }, 64 { "CENDQUOTE", "a terminating quote" }, 65 { "CBQUOTE", "backwards single quote" }, 66 { "CVAR", "a dollar sign" }, 67 { "CENDVAR", "a '}' character" }, 68 { "CLP", "a left paren in arithmetic" }, 69 { "CRP", "a right paren in arithmetic" }, 70 { "CEOF", "end of file" }, 71 { "CCTL", "like CWORD, except it must be escaped" }, 72 { "CSPCL", "these terminate a word" }, 73 { NULL, NULL } 74 }; 75 76 77 /* 78 * Syntax classes for is_ functions. Warning: if you add new classes 79 * you may have to change the definition of the is_in_name macro. 80 */ 81 struct synclass is_entry[] = { 82 { "ISDIGIT", "a digit" }, 83 { "ISUPPER", "an upper case letter" }, 84 { "ISLOWER", "a lower case letter" }, 85 { "ISUNDER", "an underscore" }, 86 { "ISSPECL", "the name of a special parameter" }, 87 { NULL, NULL } 88 }; 89 90 static char writer[] = "\ 91 /*\n\ 92 * This file was generated by the mksyntax program.\n\ 93 */\n\ 94 \n"; 95 96 97 static FILE *cfile; 98 static FILE *hfile; 99 static const char *syntax[513]; 100 static int base; 101 static int size; /* number of values which a char variable can have */ 102 static int nbits; /* number of bits in a character */ 103 static int digit_contig;/* true if digits are contiguous */ 104 105 static void filltable(const char *); 106 static void init(void); 107 static void add(const char *, const char *); 108 static void print(const char *); 109 static void output_type_macros(void); 110 static void digit_convert(void); 111 112 int 113 main(int argc __unused, char **argv __unused) 114 { 115 char c; 116 char d; 117 int sign; 118 int i; 119 char buf[80]; 120 int pos; 121 static char digit[] = "0123456789"; 122 123 /* Create output files */ 124 if ((cfile = fopen("syntax.c", "w")) == NULL) { 125 perror("syntax.c"); 126 exit(2); 127 } 128 if ((hfile = fopen("syntax.h", "w")) == NULL) { 129 perror("syntax.h"); 130 exit(2); 131 } 132 fputs(writer, hfile); 133 fputs(writer, cfile); 134 135 /* Determine the characteristics of chars. */ 136 c = -1; 137 if (c < 0) 138 sign = 1; 139 else 140 sign = 0; 141 for (nbits = 1 ; ; nbits++) { 142 d = (1 << nbits) - 1; 143 if (d == c) 144 break; 145 } 146 #if 0 147 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits); 148 #endif 149 if (nbits > 9) { 150 fputs("Characters can't have more than 9 bits\n", stderr); 151 exit(2); 152 } 153 size = (1 << nbits) + 1; 154 base = 1; 155 if (sign) 156 base += 1 << (nbits - 1); 157 digit_contig = 1; 158 for (i = 0 ; i < 10 ; i++) { 159 if (digit[i] != '0' + i) 160 digit_contig = 0; 161 } 162 163 fputs("#include <sys/cdefs.h>\n", hfile); 164 fputs("#include <ctype.h>\n", hfile); 165 166 /* Generate the #define statements in the header file */ 167 fputs("/* Syntax classes */\n", hfile); 168 for (i = 0 ; synclass[i].name ; i++) { 169 sprintf(buf, "#define %s %d", synclass[i].name, i); 170 fputs(buf, hfile); 171 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 172 putc('\t', hfile); 173 fprintf(hfile, "/* %s */\n", synclass[i].comment); 174 } 175 putc('\n', hfile); 176 fputs("/* Syntax classes for is_ functions */\n", hfile); 177 for (i = 0 ; is_entry[i].name ; i++) { 178 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << 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", is_entry[i].comment); 183 } 184 putc('\n', hfile); 185 fprintf(hfile, "#define SYNBASE %d\n", base); 186 fprintf(hfile, "#define PEOF %d\n\n", -base); 187 putc('\n', hfile); 188 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 189 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 190 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 191 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 192 putc('\n', hfile); 193 output_type_macros(); /* is_digit, etc. */ 194 putc('\n', hfile); 195 196 /* Generate the syntax tables. */ 197 fputs("#include \"shell.h\"\n", cfile); 198 fputs("#include \"syntax.h\"\n\n", cfile); 199 init(); 200 fputs("/* syntax table used when not in quotes */\n", cfile); 201 add("\n", "CNL"); 202 add("\\", "CBACK"); 203 add("'", "CSQUOTE"); 204 add("\"", "CDQUOTE"); 205 add("`", "CBQUOTE"); 206 add("$", "CVAR"); 207 add("}", "CENDVAR"); 208 add("<>();&| \t", "CSPCL"); 209 print("basesyntax"); 210 init(); 211 fputs("\n/* syntax table used when in double quotes */\n", cfile); 212 add("\n", "CNL"); 213 add("\\", "CBACK"); 214 add("\"", "CENDQUOTE"); 215 add("`", "CBQUOTE"); 216 add("$", "CVAR"); 217 add("}", "CENDVAR"); 218 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 219 add("!*?[=~:/-", "CCTL"); 220 print("dqsyntax"); 221 init(); 222 fputs("\n/* syntax table used when in single quotes */\n", cfile); 223 add("\n", "CNL"); 224 add("'", "CENDQUOTE"); 225 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 226 add("!*?[=~:/-", "CCTL"); 227 print("sqsyntax"); 228 init(); 229 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 230 add("\n", "CNL"); 231 add("\\", "CBACK"); 232 add("`", "CBQUOTE"); 233 add("'", "CSQUOTE"); 234 add("\"", "CDQUOTE"); 235 add("$", "CVAR"); 236 add("}", "CENDVAR"); 237 add("(", "CLP"); 238 add(")", "CRP"); 239 print("arisyntax"); 240 filltable("0"); 241 fputs("\n/* character classification table */\n", cfile); 242 add("0123456789", "ISDIGIT"); 243 add("abcdefghijklmnopqrstucvwxyz", "ISLOWER"); 244 add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER"); 245 add("_", "ISUNDER"); 246 add("#?$!-*@", "ISSPECL"); 247 print("is_type"); 248 if (! digit_contig) 249 digit_convert(); 250 exit(0); 251 } 252 253 254 255 /* 256 * Clear the syntax table. 257 */ 258 259 static void 260 filltable(const char *dftval) 261 { 262 int i; 263 264 for (i = 0 ; i < size ; i++) 265 syntax[i] = dftval; 266 } 267 268 269 /* 270 * Initialize the syntax table with default values. 271 */ 272 273 static void 274 init(void) 275 { 276 filltable("CWORD"); 277 syntax[0] = "CEOF"; 278 syntax[base + CTLESC] = "CCTL"; 279 syntax[base + CTLVAR] = "CCTL"; 280 syntax[base + CTLENDVAR] = "CCTL"; 281 syntax[base + CTLBACKQ] = "CCTL"; 282 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL"; 283 syntax[base + CTLARI] = "CCTL"; 284 syntax[base + CTLENDARI] = "CCTL"; 285 syntax[base + CTLQUOTEMARK] = "CCTL"; 286 } 287 288 289 /* 290 * Add entries to the syntax table. 291 */ 292 293 static void 294 add(const char *p, const char *type) 295 { 296 while (*p) 297 syntax[*p++ + base] = type; 298 } 299 300 301 302 /* 303 * Output the syntax table. 304 */ 305 306 static void 307 print(const char *name) 308 { 309 int i; 310 int col; 311 312 fprintf(hfile, "extern const char %s[];\n", name); 313 fprintf(cfile, "const char %s[%d] = {\n", name, size); 314 col = 0; 315 for (i = 0 ; i < size ; i++) { 316 if (i == 0) { 317 fputs(" ", cfile); 318 } else if ((i & 03) == 0) { 319 fputs(",\n ", cfile); 320 col = 0; 321 } else { 322 putc(',', cfile); 323 while (++col < 9 * (i & 03)) 324 putc(' ', cfile); 325 } 326 fputs(syntax[i], cfile); 327 col += strlen(syntax[i]); 328 } 329 fputs("\n};\n", cfile); 330 } 331 332 333 334 /* 335 * Output character classification macros (e.g. is_digit). If digits are 336 * contiguous, we can test for them quickly. 337 */ 338 339 static const char *macro[] = { 340 "#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)", 341 "#define is_alpha(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLQUOTEMARK) && isalpha((unsigned char) (c)))", 342 "#define is_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLQUOTEMARK) && ((c) == '_' || isalpha((unsigned char) (c))))", 343 "#define is_in_name(c)\t((c) != PEOF && ((c) < CTLESC || (c) > CTLQUOTEMARK) && ((c) == '_' || isalnum((unsigned char) (c))))", 344 "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))", 345 NULL 346 }; 347 348 static void 349 output_type_macros(void) 350 { 351 const char **pp; 352 353 if (digit_contig) 354 macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)"; 355 for (pp = macro ; *pp ; pp++) 356 fprintf(hfile, "%s\n", *pp); 357 if (digit_contig) 358 fputs("#define digit_val(c)\t((c) - '0')\n", hfile); 359 else 360 fputs("#define digit_val(c)\t(digit_value[c])\n", hfile); 361 } 362 363 364 365 /* 366 * Output digit conversion table (if digits are not contiguous). 367 */ 368 369 static void 370 digit_convert(void) 371 { 372 int maxdigit; 373 static char digit[] = "0123456789"; 374 char *p; 375 int i; 376 377 maxdigit = 0; 378 for (p = digit ; *p ; p++) 379 if (*p > maxdigit) 380 maxdigit = *p; 381 fputs("extern const char digit_value[];\n", hfile); 382 fputs("\n\nconst char digit_value[] = {\n", cfile); 383 for (i = 0 ; i <= maxdigit ; i++) { 384 for (p = digit ; *p && *p != i ; p++); 385 if (*p == '\0') 386 p = digit; 387 fprintf(cfile, " %d,\n", p - digit); 388 } 389 fputs("};\n", cfile); 390 } 391