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 * %sccs.include.redist.c% 9 */ 10 11 #ifndef lint 12 static char copyright[] = 13 "@(#) Copyright (c) 1991, 1993\n\ 14 The Regents of the University of California. All rights reserved.\n"; 15 #endif /* not lint */ 16 17 #ifndef lint 18 static char sccsid[] = "@(#)mksyntax.c 8.2 (Berkeley) 05/04/95"; 19 #endif /* not lint */ 20 21 /* 22 * This program creates syntax.h and syntax.c. 23 */ 24 25 #include <stdio.h> 26 #include <string.h> 27 #include "parser.h" 28 29 30 struct synclass { 31 char *name; 32 char *comment; 33 }; 34 35 /* Syntax classes */ 36 struct synclass synclass[] = { 37 { "CWORD", "character is nothing special" }, 38 { "CNL", "newline character" }, 39 { "CBACK", "a backslash character" }, 40 { "CSQUOTE", "single quote" }, 41 { "CDQUOTE", "double quote" }, 42 { "CENDQUOTE", "a terminating quote" }, 43 { "CBQUOTE", "backwards single quote" }, 44 { "CVAR", "a dollar sign" }, 45 { "CENDVAR", "a '}' character" }, 46 { "CLP", "a left paren in arithmetic" }, 47 { "CRP", "a right paren in arithmetic" }, 48 { "CEOF", "end of file" }, 49 { "CCTL", "like CWORD, except it must be escaped" }, 50 { "CSPCL", "these terminate a word" }, 51 { NULL, NULL } 52 }; 53 54 55 /* 56 * Syntax classes for is_ functions. Warning: if you add new classes 57 * you may have to change the definition of the is_in_name macro. 58 */ 59 struct synclass is_entry[] = { 60 { "ISDIGIT", "a digit" }, 61 { "ISUPPER", "an upper case letter" }, 62 { "ISLOWER", "a lower case letter" }, 63 { "ISUNDER", "an underscore" }, 64 { "ISSPECL", "the name of a special parameter" }, 65 { NULL, NULL } 66 }; 67 68 static char writer[] = "\ 69 /*\n\ 70 * This file was generated by the mksyntax program.\n\ 71 */\n\ 72 \n"; 73 74 75 static FILE *cfile; 76 static FILE *hfile; 77 static char *syntax[513]; 78 static int base; 79 static int size; /* number of values which a char variable can have */ 80 static int nbits; /* number of bits in a character */ 81 static int digit_contig;/* true if digits are contiguous */ 82 83 static void filltable __P((char *)); 84 static void init __P((void)); 85 static void add __P((char *, char *)); 86 static void print __P((char *)); 87 static void output_type_macros __P((void)); 88 static void digit_convert __P((void)); 89 90 int 91 main(argc, argv) 92 int argc; 93 char **argv; 94 { 95 char c; 96 char d; 97 int sign; 98 int i; 99 char buf[80]; 100 int pos; 101 static char digit[] = "0123456789"; 102 103 /* Create output files */ 104 if ((cfile = fopen("syntax.c", "w")) == NULL) { 105 perror("syntax.c"); 106 exit(2); 107 } 108 if ((hfile = fopen("syntax.h", "w")) == NULL) { 109 perror("syntax.h"); 110 exit(2); 111 } 112 fputs(writer, hfile); 113 fputs(writer, cfile); 114 115 /* Determine the characteristics of chars. */ 116 c = -1; 117 if (c < 0) 118 sign = 1; 119 else 120 sign = 0; 121 for (nbits = 1 ; ; nbits++) { 122 d = (1 << nbits) - 1; 123 if (d == c) 124 break; 125 } 126 printf("%s %d bit chars\n", sign? "signed" : "unsigned", nbits); 127 if (nbits > 9) { 128 fputs("Characters can't have more than 9 bits\n", stderr); 129 exit(2); 130 } 131 size = (1 << nbits) + 1; 132 base = 1; 133 if (sign) 134 base += 1 << (nbits - 1); 135 digit_contig = 1; 136 for (i = 0 ; i < 10 ; i++) { 137 if (digit[i] != '0' + i) 138 digit_contig = 0; 139 } 140 141 fputs("#include <sys/cdefs.h>\n", hfile); 142 143 /* Generate the #define statements in the header file */ 144 fputs("/* Syntax classes */\n", hfile); 145 for (i = 0 ; synclass[i].name ; i++) { 146 sprintf(buf, "#define %s %d", synclass[i].name, i); 147 fputs(buf, hfile); 148 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 149 putc('\t', hfile); 150 fprintf(hfile, "/* %s */\n", synclass[i].comment); 151 } 152 putc('\n', hfile); 153 fputs("/* Syntax classes for is_ functions */\n", hfile); 154 for (i = 0 ; is_entry[i].name ; i++) { 155 sprintf(buf, "#define %s %#o", is_entry[i].name, 1 << i); 156 fputs(buf, hfile); 157 for (pos = strlen(buf) ; pos < 32 ; pos = (pos + 8) & ~07) 158 putc('\t', hfile); 159 fprintf(hfile, "/* %s */\n", is_entry[i].comment); 160 } 161 putc('\n', hfile); 162 fprintf(hfile, "#define SYNBASE %d\n", base); 163 fprintf(hfile, "#define PEOF %d\n\n", -base); 164 putc('\n', hfile); 165 fputs("#define BASESYNTAX (basesyntax + SYNBASE)\n", hfile); 166 fputs("#define DQSYNTAX (dqsyntax + SYNBASE)\n", hfile); 167 fputs("#define SQSYNTAX (sqsyntax + SYNBASE)\n", hfile); 168 fputs("#define ARISYNTAX (arisyntax + SYNBASE)\n", hfile); 169 putc('\n', hfile); 170 output_type_macros(); /* is_digit, etc. */ 171 putc('\n', hfile); 172 173 /* Generate the syntax tables. */ 174 fputs("#include \"shell.h\"\n", cfile); 175 fputs("#include \"syntax.h\"\n\n", cfile); 176 init(); 177 fputs("/* syntax table used when not in quotes */\n", cfile); 178 add("\n", "CNL"); 179 add("\\", "CBACK"); 180 add("'", "CSQUOTE"); 181 add("\"", "CDQUOTE"); 182 add("`", "CBQUOTE"); 183 add("$", "CVAR"); 184 add("}", "CENDVAR"); 185 add("<>();&| \t", "CSPCL"); 186 print("basesyntax"); 187 init(); 188 fputs("\n/* syntax table used when in double quotes */\n", cfile); 189 add("\n", "CNL"); 190 add("\\", "CBACK"); 191 add("\"", "CENDQUOTE"); 192 add("`", "CBQUOTE"); 193 add("$", "CVAR"); 194 add("}", "CENDVAR"); 195 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 196 add("!*?[=~:/-", "CCTL"); 197 print("dqsyntax"); 198 init(); 199 fputs("\n/* syntax table used when in single quotes */\n", cfile); 200 add("\n", "CNL"); 201 add("'", "CENDQUOTE"); 202 /* ':/' for tilde expansion, '-' for [a\-x] pattern ranges */ 203 add("!*?[=~:/-", "CCTL"); 204 print("sqsyntax"); 205 init(); 206 fputs("\n/* syntax table used when in arithmetic */\n", cfile); 207 add("\n", "CNL"); 208 add("\\", "CBACK"); 209 add("`", "CBQUOTE"); 210 add("'", "CSQUOTE"); 211 add("\"", "CDQUOTE"); 212 add("$", "CVAR"); 213 add("}", "CENDVAR"); 214 add("(", "CLP"); 215 add(")", "CRP"); 216 print("arisyntax"); 217 filltable("0"); 218 fputs("\n/* character classification table */\n", cfile); 219 add("0123456789", "ISDIGIT"); 220 add("abcdefghijklmnopqrstucvwxyz", "ISLOWER"); 221 add("ABCDEFGHIJKLMNOPQRSTUCVWXYZ", "ISUPPER"); 222 add("_", "ISUNDER"); 223 add("#?$!-*@", "ISSPECL"); 224 print("is_type"); 225 if (! digit_contig) 226 digit_convert(); 227 exit(0); 228 } 229 230 231 232 /* 233 * Clear the syntax table. 234 */ 235 236 static void 237 filltable(dftval) 238 char *dftval; 239 { 240 int i; 241 242 for (i = 0 ; i < size ; i++) 243 syntax[i] = dftval; 244 } 245 246 247 /* 248 * Initialize the syntax table with default values. 249 */ 250 251 static void 252 init() 253 { 254 filltable("CWORD"); 255 syntax[0] = "CEOF"; 256 syntax[base + CTLESC] = "CCTL"; 257 syntax[base + CTLVAR] = "CCTL"; 258 syntax[base + CTLENDVAR] = "CCTL"; 259 syntax[base + CTLBACKQ] = "CCTL"; 260 syntax[base + CTLBACKQ + CTLQUOTE] = "CCTL"; 261 syntax[base + CTLARI] = "CCTL"; 262 syntax[base + CTLENDARI] = "CCTL"; 263 } 264 265 266 /* 267 * Add entries to the syntax table. 268 */ 269 270 static void 271 add(p, type) 272 char *p, *type; 273 { 274 while (*p) 275 syntax[*p++ + base] = type; 276 } 277 278 279 280 /* 281 * Output the syntax table. 282 */ 283 284 static void 285 print(name) 286 char *name; 287 { 288 int i; 289 int col; 290 291 fprintf(hfile, "extern const char %s[];\n", name); 292 fprintf(cfile, "const char %s[%d] = {\n", name, size); 293 col = 0; 294 for (i = 0 ; i < size ; i++) { 295 if (i == 0) { 296 fputs(" ", cfile); 297 } else if ((i & 03) == 0) { 298 fputs(",\n ", cfile); 299 col = 0; 300 } else { 301 putc(',', cfile); 302 while (++col < 9 * (i & 03)) 303 putc(' ', cfile); 304 } 305 fputs(syntax[i], cfile); 306 col += strlen(syntax[i]); 307 } 308 fputs("\n};\n", cfile); 309 } 310 311 312 313 /* 314 * Output character classification macros (e.g. is_digit). If digits are 315 * contiguous, we can test for them quickly. 316 */ 317 318 static char *macro[] = { 319 "#define is_digit(c)\t((is_type+SYNBASE)[c] & ISDIGIT)", 320 "#define is_alpha(c)\t((is_type+SYNBASE)[c] & (ISUPPER|ISLOWER))", 321 "#define is_name(c)\t((is_type+SYNBASE)[c] & (ISUPPER|ISLOWER|ISUNDER))", 322 "#define is_in_name(c)\t((is_type+SYNBASE)[c] & (ISUPPER|ISLOWER|ISUNDER|ISDIGIT))", 323 "#define is_special(c)\t((is_type+SYNBASE)[c] & (ISSPECL|ISDIGIT))", 324 NULL 325 }; 326 327 static void 328 output_type_macros() 329 { 330 char **pp; 331 332 if (digit_contig) 333 macro[0] = "#define is_digit(c)\t((unsigned)((c) - '0') <= 9)"; 334 for (pp = macro ; *pp ; pp++) 335 fprintf(hfile, "%s\n", *pp); 336 if (digit_contig) 337 fputs("#define digit_val(c)\t((c) - '0')\n", hfile); 338 else 339 fputs("#define digit_val(c)\t(digit_value[c])\n", hfile); 340 } 341 342 343 344 /* 345 * Output digit conversion table (if digits are not contiguous). 346 */ 347 348 static void 349 digit_convert() 350 { 351 int maxdigit; 352 static char digit[] = "0123456789"; 353 char *p; 354 int i; 355 356 maxdigit = 0; 357 for (p = digit ; *p ; p++) 358 if (*p > maxdigit) 359 maxdigit = *p; 360 fputs("extern const char digit_value[];\n", hfile); 361 fputs("\n\nconst char digit_value[] = {\n", cfile); 362 for (i = 0 ; i <= maxdigit ; i++) { 363 for (p = digit ; *p && *p != i ; p++); 364 if (*p == '\0') 365 p = digit; 366 fprintf(cfile, " %d,\n", p - digit); 367 } 368 fputs("};\n", cfile); 369 } 370