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 1.34 2010/11/20 14:30:28 jilles Exp $ 39 */ 40 41 /* 42 * This program creates syntax.h and syntax.c. 43 */ 44 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 #include "parser.h" 49 50 51 struct synclass { 52 const char *name; 53 const char *comment; 54 }; 55 56 /* Syntax classes */ 57 struct synclass synclass[] = { 58 { "CWORD", "character is nothing special" }, 59 { "CNL", "newline character" }, 60 { "CBACK", "a backslash character" }, 61 { "CSQUOTE", "single quote" }, 62 { "CDQUOTE", "double quote" }, 63 { "CENDQUOTE", "a terminating quote" }, 64 { "CBQUOTE", "backwards single quote" }, 65 { "CVAR", "a dollar sign" }, 66 { "CENDVAR", "a '}' character" }, 67 { "CLP", "a left paren in arithmetic" }, 68 { "CRP", "a right paren in arithmetic" }, 69 { "CEOF", "end of file" }, 70 { "CCTL", "like CWORD, except it must be escaped" }, 71 { "CSPCL", "these terminate a word" }, 72 { "CIGN", "character should be ignored" }, 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 sign = (c > 0) ? 0 : 1; 138 for (nbits = 1 ; ; nbits++) { 139 d = (1 << nbits) - 1; 140 if (d == c) 141 break; 142 } 143 #if 0 144 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits); 145 #endif 146 if (nbits > 9) { 147 fputs("Characters can't have more than 9 bits\n", stderr); 148 exit(2); 149 } 150 size = (1 << nbits) + 1; 151 base = 1; 152 if (sign) 153 base += 1 << (nbits - 1); 154 digit_contig = 1; 155 for (i = 0 ; i < 10 ; i++) { 156 if (digit[i] != '0' + i) 157 digit_contig = 0; 158 } 159 160 fputs("#include <sys/cdefs.h>\n", hfile); 161 fputs("#include <ctype.h>\n", hfile); 162 163 /* Generate the #define statements in the header file */ 164 fputs("/* Syntax classes */\n", hfile); 165 for (i = 0 ; synclass[i].name ; i++) { 166 sprintf(buf, "#define %s %d", synclass[i].name, i); 167 fputs(buf, hfile); 168 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 169 putc('\t', hfile); 170 fprintf(hfile, "/* %s */\n", synclass[i].comment); 171 } 172 putc('\n', hfile); 173 fputs("/* Syntax classes for is_ functions */\n", hfile); 174 for (i = 0 ; is_entry[i].name ; i++) { 175 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << 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", is_entry[i].comment); 180 } 181 putc('\n', hfile); 182 fprintf(hfile, "#define SYNBASE %d\n", base); 183 fprintf(hfile, "#define PEOF %d\n\n", -base); 184 putc('\n', hfile); 185 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 186 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 187 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 188 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 189 putc('\n', hfile); 190 output_type_macros(); /* is_digit, etc. */ 191 putc('\n', hfile); 192 193 /* Generate the syntax tables. */ 194 fputs("#include \"shell.h\"\n", cfile); 195 fputs("#include \"syntax.h\"\n\n", cfile); 196 init(); 197 fputs("/* syntax table used when not in quotes */\n", cfile); 198 add("\n", "CNL"); 199 add("\\", "CBACK"); 200 add("'", "CSQUOTE"); 201 add("\"", "CDQUOTE"); 202 add("`", "CBQUOTE"); 203 add("$", "CVAR"); 204 add("}", "CENDVAR"); 205 add("<>();&| \t", "CSPCL"); 206 print("basesyntax"); 207 init(); 208 fputs("\n/* syntax table used when in double quotes */\n", cfile); 209 add("\n", "CNL"); 210 add("\\", "CBACK"); 211 add("\"", "CENDQUOTE"); 212 add("`", "CBQUOTE"); 213 add("$", "CVAR"); 214 add("}", "CENDVAR"); 215 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 216 add("!*?[=~:/-", "CCTL"); 217 print("dqsyntax"); 218 init(); 219 fputs("\n/* syntax table used when in single quotes */\n", cfile); 220 add("\n", "CNL"); 221 add("'", "CENDQUOTE"); 222 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 223 add("!*?[=~:/-", "CCTL"); 224 print("sqsyntax"); 225 init(); 226 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 227 add("\n", "CNL"); 228 add("\\", "CBACK"); 229 add("`", "CBQUOTE"); 230 add("\"", "CIGN"); 231 add("$", "CVAR"); 232 add("}", "CENDVAR"); 233 add("(", "CLP"); 234 add(")", "CRP"); 235 print("arisyntax"); 236 filltable("0"); 237 fputs("\n/* character classification table */\n", cfile); 238 add("0123456789", "ISDIGIT"); 239 add("abcdefghijklmnopqrstuvwxyz", "ISLOWER"); 240 add("ABCDEFGHIJKLMNOPQRSTUVWXYZ", "ISUPPER"); 241 add("_", "ISUNDER"); 242 add("#?$!-*@", "ISSPECL"); 243 print("is_type"); 244 if (! digit_contig) 245 digit_convert(); 246 exit(0); 247 } 248 249 250 251 /* 252 * Clear the syntax table. 253 */ 254 255 static void 256 filltable(const char *dftval) 257 { 258 int i; 259 260 for (i = 0 ; i < size ; i++) 261 syntax[i] = dftval; 262 } 263 264 265 /* 266 * Initialize the syntax table with default values. 267 */ 268 269 static void 270 init(void) 271 { 272 filltable("CWORD"); 273 syntax[0] = "CEOF"; 274 syntax[base + CTLESC] = "CCTL"; 275 syntax[base + CTLVAR] = "CCTL"; 276 syntax[base + CTLENDVAR] = "CCTL"; 277 syntax[base + CTLBACKQ] = "CCTL"; 278 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL"; 279 syntax[base + CTLARI] = "CCTL"; 280 syntax[base + CTLENDARI] = "CCTL"; 281 syntax[base + CTLQUOTEMARK] = "CCTL"; 282 syntax[base + CTLQUOTEEND] = "CCTL"; 283 } 284 285 286 /* 287 * Add entries to the syntax table. 288 */ 289 290 static void 291 add(const char *p, const char *type) 292 { 293 while (*p) 294 syntax[*p++ + base] = type; 295 } 296 297 298 299 /* 300 * Output the syntax table. 301 */ 302 303 static void 304 print(const char *name) 305 { 306 int i; 307 int col; 308 309 fprintf(hfile, "extern const char %s[];\n", name); 310 fprintf(cfile, "const char %s[%d] = {\n", name, size); 311 col = 0; 312 for (i = 0 ; i < size ; i++) { 313 if (i == 0) { 314 fputs(" ", cfile); 315 } else if ((i & 03) == 0) { 316 fputs(",\n ", cfile); 317 col = 0; 318 } else { 319 putc(',', cfile); 320 while (++col < 9 * (i & 03)) 321 putc(' ', cfile); 322 } 323 fputs(syntax[i], cfile); 324 col += strlen(syntax[i]); 325 } 326 fputs("\n};\n", cfile); 327 } 328 329 330 331 /* 332 * Output character classification macros (e.g. is_digit). If digits are 333 * contiguous, we can test for them quickly. 334 */ 335 336 static const char *macro[] = { 337 "#define is_digit(c)\t((is_type+SYNBASE)[(int)c] & ISDIGIT)", 338 "#define is_eof(c)\t((c) == PEOF)", 339 "#define is_alpha(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER))", 340 "#define is_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER))", 341 "#define is_in_name(c)\t((is_type+SYNBASE)[(int)c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))", 342 "#define is_special(c)\t((is_type+SYNBASE)[(int)c] & (ISSPECL|ISDIGIT))", 343 NULL 344 }; 345 346 static void 347 output_type_macros(void) 348 { 349 const char **pp; 350 351 if (digit_contig) 352 macro[0] = "#define is_digit(c)\t((unsigned int)((c) - '0') <= 9)"; 353 for (pp = macro ; *pp ; pp++) 354 fprintf(hfile, "%s\n", *pp); 355 if (digit_contig) 356 fputs("#define digit_val(c)\t((c) - '0')\n", hfile); 357 else 358 fputs("#define digit_val(c)\t(digit_value[c])\n", hfile); 359 } 360 361 362 363 /* 364 * Output digit conversion table (if digits are not contiguous). 365 */ 366 367 static void 368 digit_convert(void) 369 { 370 int maxdigit; 371 static char digit[] = "0123456789"; 372 char *p; 373 int i; 374 375 maxdigit = 0; 376 for (p = digit ; *p ; p++) 377 if (*p > maxdigit) 378 maxdigit = *p; 379 fputs("extern const char digit_value[];\n", hfile); 380 fputs("\n\nconst char digit_value[] = {\n", cfile); 381 for (i = 0 ; i <= maxdigit ; i++) { 382 for (p = digit ; *p && *p != i ; p++); 383 if (*p == '\0') 384 p = digit; 385 fprintf(cfile, " %td,\n", p - digit); 386 } 387 fputs("};\n", cfile); 388 } 389