1 /* 2 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 3 * unrestricted use provided that this legend is included on all tape 4 * media and as a part of the software program in whole or part. Users 5 * may copy or modify Sun RPC without charge, but are not authorized 6 * to license or distribute it to anyone else except as part of a product or 7 * program developed by the user. 8 * 9 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 10 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 11 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 12 * 13 * Sun RPC is provided with no support and without any obligation on the 14 * part of Sun Microsystems, Inc. to assist in its use, correction, 15 * modification or enhancement. 16 * 17 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 18 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 19 * OR ANY PART THEREOF. 20 * 21 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 22 * or profits or other special, indirect and consequential damages, even if 23 * Sun has been advised of the possibility of such damages. 24 * 25 * Sun Microsystems, Inc. 26 * 2550 Garcia Avenue 27 * Mountain View, California 94043 28 */ 29 30 #if 0 31 #ifndef lint 32 #ident "@(#)rpc_scan.c 1.13 93/07/05 SMI" 33 static char sccsid[] = "@(#)rpc_scan.c 1.11 89/02/22 (C) 1987 SMI"; 34 #endif 35 #endif 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 /* 41 * rpc_scan.c, Scanner for the RPC protocol compiler 42 * Copyright (C) 1987, Sun Microsystems, Inc. 43 */ 44 45 #include <sys/types.h> 46 47 #include <sys/wait.h> 48 #include <stdio.h> 49 #include <ctype.h> 50 #include <string.h> 51 #include "rpc_parse.h" 52 #include "rpc_scan.h" 53 #include "rpc_util.h" 54 55 #define startcomment(where) (where[0] == '/' && where[1] == '*') 56 #define endcomment(where) (where[-1] == '*' && where[0] == '/') 57 58 static int pushed = 0; /* is a token pushed */ 59 static token lasttok; /* last token, if pushed */ 60 61 static void unget_token( token * ); 62 static void findstrconst(char **, const char **); 63 static void findchrconst(char **, const char **); 64 static void findconst(char **, const char **); 65 static void findkind( char **, token * ); 66 static int cppline( char * ); 67 static int directive( char * ); 68 static void printdirective( char * ); 69 static void docppline(char *, int *, const char **); 70 71 /* 72 * scan expecting 1 given token 73 */ 74 void 75 scan(tok_kind expect, token *tokp) 76 { 77 get_token(tokp); 78 if (tokp->kind != expect) { 79 expected1(expect); 80 } 81 } 82 83 /* 84 * scan expecting any of the 2 given tokens 85 */ 86 void 87 scan2(tok_kind expect1, tok_kind expect2, token *tokp) 88 { 89 get_token(tokp); 90 if (tokp->kind != expect1 && tokp->kind != expect2) { 91 expected2(expect1, expect2); 92 } 93 } 94 95 /* 96 * scan expecting any of the 3 given token 97 */ 98 void 99 scan3(tok_kind expect1, tok_kind expect2, tok_kind expect3, token *tokp) 100 { 101 get_token(tokp); 102 if (tokp->kind != expect1 && tokp->kind != expect2 103 && tokp->kind != expect3) { 104 expected3(expect1, expect2, expect3); 105 } 106 } 107 108 /* 109 * scan expecting a constant, possibly symbolic 110 */ 111 void 112 scan_num(token *tokp) 113 { 114 get_token(tokp); 115 switch (tokp->kind) { 116 case TOK_IDENT: 117 break; 118 default: 119 error("constant or identifier expected"); 120 } 121 } 122 123 /* 124 * Peek at the next token 125 */ 126 void 127 peek(token *tokp) 128 { 129 get_token(tokp); 130 unget_token(tokp); 131 } 132 133 /* 134 * Peek at the next token and scan it if it matches what you expect 135 */ 136 int 137 peekscan(tok_kind expect, token *tokp) 138 { 139 peek(tokp); 140 if (tokp->kind == expect) { 141 get_token(tokp); 142 return (1); 143 } 144 return (0); 145 } 146 147 /* 148 * Get the next token, printing out any directive that are encountered. 149 */ 150 void 151 get_token(token *tokp) 152 { 153 int commenting; 154 int stat = 0; 155 156 157 if (pushed) { 158 pushed = 0; 159 *tokp = lasttok; 160 return; 161 } 162 commenting = 0; 163 for (;;) { 164 if (*where == 0) { 165 for (;;) { 166 if (!fgets(curline, MAXLINESIZE, fin)) { 167 tokp->kind = TOK_EOF; 168 /* now check if cpp returned non NULL value */ 169 waitpid(childpid, &stat, WUNTRACED); 170 if (stat > 0) { 171 /* Set return value from rpcgen */ 172 nonfatalerrors = stat >> 8; 173 } 174 *where = 0; 175 return; 176 } 177 linenum++; 178 if (commenting) { 179 break; 180 } else if (cppline(curline)) { 181 docppline(curline, &linenum, 182 &infilename); 183 } else if (directive(curline)) { 184 printdirective(curline); 185 } else { 186 break; 187 } 188 } 189 where = curline; 190 } else if (isspace(*where)) { 191 while (isspace(*where)) { 192 where++; /* eat */ 193 } 194 } else if (commenting) { 195 for (where++; *where; where++) { 196 if (endcomment(where)) { 197 where++; 198 commenting--; 199 break; 200 } 201 } 202 } else if (startcomment(where)) { 203 where += 2; 204 commenting++; 205 } else { 206 break; 207 } 208 } 209 210 /* 211 * 'where' is not whitespace, comment or directive Must be a token! 212 */ 213 switch (*where) { 214 case ':': 215 tokp->kind = TOK_COLON; 216 where++; 217 break; 218 case ';': 219 tokp->kind = TOK_SEMICOLON; 220 where++; 221 break; 222 case ',': 223 tokp->kind = TOK_COMMA; 224 where++; 225 break; 226 case '=': 227 tokp->kind = TOK_EQUAL; 228 where++; 229 break; 230 case '*': 231 tokp->kind = TOK_STAR; 232 where++; 233 break; 234 case '[': 235 tokp->kind = TOK_LBRACKET; 236 where++; 237 break; 238 case ']': 239 tokp->kind = TOK_RBRACKET; 240 where++; 241 break; 242 case '{': 243 tokp->kind = TOK_LBRACE; 244 where++; 245 break; 246 case '}': 247 tokp->kind = TOK_RBRACE; 248 where++; 249 break; 250 case '(': 251 tokp->kind = TOK_LPAREN; 252 where++; 253 break; 254 case ')': 255 tokp->kind = TOK_RPAREN; 256 where++; 257 break; 258 case '<': 259 tokp->kind = TOK_LANGLE; 260 where++; 261 break; 262 case '>': 263 tokp->kind = TOK_RANGLE; 264 where++; 265 break; 266 267 case '"': 268 tokp->kind = TOK_STRCONST; 269 findstrconst(&where, &tokp->str); 270 break; 271 case '\'': 272 tokp->kind = TOK_CHARCONST; 273 findchrconst(&where, &tokp->str); 274 break; 275 276 case '-': 277 case '0': 278 case '1': 279 case '2': 280 case '3': 281 case '4': 282 case '5': 283 case '6': 284 case '7': 285 case '8': 286 case '9': 287 tokp->kind = TOK_IDENT; 288 findconst(&where, &tokp->str); 289 break; 290 291 default: 292 if (!(isalpha(*where) || *where == '_')) { 293 char buf[100]; 294 char *p; 295 296 s_print(buf, "illegal character in file: "); 297 p = buf + strlen(buf); 298 if (isprint(*where)) { 299 s_print(p, "%c", *where); 300 } else { 301 s_print(p, "%d", *where); 302 } 303 error(buf); 304 } 305 findkind(&where, tokp); 306 break; 307 } 308 } 309 310 static void 311 unget_token(token *tokp) 312 { 313 lasttok = *tokp; 314 pushed = 1; 315 } 316 317 static void 318 findstrconst(char **str, const char **val) 319 { 320 char *p; 321 char *tmp; 322 int size; 323 324 p = *str; 325 do { 326 p++; 327 } while (*p && *p != '"'); 328 if (*p == 0) { 329 error("unterminated string constant"); 330 } 331 p++; 332 size = p - *str + 1; 333 tmp = xmalloc(size); 334 (void) strlcpy(tmp, *str, size); 335 *val = tmp; 336 *str = p; 337 } 338 339 static void 340 findchrconst(char **str, const char **val) 341 { 342 char *p; 343 char *tmp; 344 int size; 345 346 p = *str; 347 do { 348 p++; 349 } while (*p && *p != '\''); 350 if (*p == 0) { 351 error("unterminated string constant"); 352 } 353 p++; 354 size = p - *str + 1; 355 if (size != 4) { 356 error("empty char string"); 357 } 358 tmp = xmalloc(size); 359 (void) strlcpy(tmp, *str, size); 360 *val = tmp; 361 *str = p; 362 } 363 364 static void 365 findconst(char **str, const char **val) 366 { 367 char *p; 368 char *tmp; 369 int size; 370 371 p = *str; 372 if (*p == '0' && *(p + 1) == 'x') { 373 p++; 374 do { 375 p++; 376 } while (isxdigit(*p)); 377 } else { 378 do { 379 p++; 380 } while (isdigit(*p)); 381 } 382 size = p - *str + 1; 383 tmp = xmalloc(size); 384 (void) strlcpy(tmp, *str, size); 385 *val = tmp; 386 *str = p; 387 } 388 389 static token symbols[] = { 390 {TOK_CONST, "const"}, 391 {TOK_UNION, "union"}, 392 {TOK_SWITCH, "switch"}, 393 {TOK_CASE, "case"}, 394 {TOK_DEFAULT, "default"}, 395 {TOK_STRUCT, "struct"}, 396 {TOK_TYPEDEF, "typedef"}, 397 {TOK_ENUM, "enum"}, 398 {TOK_OPAQUE, "opaque"}, 399 {TOK_BOOL, "bool"}, 400 {TOK_VOID, "void"}, 401 {TOK_CHAR, "char"}, 402 {TOK_INT, "int"}, 403 {TOK_UNSIGNED, "unsigned"}, 404 {TOK_SHORT, "short"}, 405 {TOK_LONG, "long"}, 406 {TOK_HYPER, "hyper"}, 407 {TOK_FLOAT, "float"}, 408 {TOK_DOUBLE, "double"}, 409 {TOK_QUAD, "quadruple"}, 410 {TOK_STRING, "string"}, 411 {TOK_PROGRAM, "program"}, 412 {TOK_VERSION, "version"}, 413 {TOK_EOF, "??????"}, 414 }; 415 416 static void 417 findkind(char **mark, token *tokp) 418 { 419 int len; 420 token *s; 421 char *str, *tmp; 422 423 str = *mark; 424 for (s = symbols; s->kind != TOK_EOF; s++) { 425 len = strlen(s->str); 426 if (strncmp(str, s->str, len) == 0) { 427 if (!isalnum(str[len]) && str[len] != '_') { 428 tokp->kind = s->kind; 429 tokp->str = s->str; 430 *mark = str + len; 431 return; 432 } 433 } 434 } 435 tokp->kind = TOK_IDENT; 436 for (len = 0; isalnum(str[len]) || str[len] == '_'; len++); 437 tmp = xmalloc(len + 1); 438 (void) strlcpy(tmp, str, len + 1); 439 tokp->str = tmp; 440 *mark = str + len; 441 } 442 443 static int 444 cppline(char *line) 445 { 446 return (line == curline && *line == '#'); 447 } 448 449 static int 450 directive(char *line) 451 { 452 return (line == curline && *line == '%'); 453 } 454 455 static void 456 printdirective(char *line) 457 { 458 f_print(fout, "%s", line + 1); 459 } 460 461 static void 462 docppline(char *line, int *lineno, const char **fname) 463 { 464 char *file; 465 int num; 466 char *p; 467 468 line++; 469 while (isspace(*line)) { 470 line++; 471 } 472 num = atoi(line); 473 while (isdigit(*line)) { 474 line++; 475 } 476 while (isspace(*line)) { 477 line++; 478 } 479 if (*line != '"') { 480 error("preprocessor error"); 481 } 482 line++; 483 p = file = xmalloc(strlen(line) + 1); 484 while (*line && *line != '"') { 485 *p++ = *line++; 486 } 487 if (*line == 0) { 488 error("preprocessor error"); 489 } 490 *p = 0; 491 if (*file == 0) { 492 *fname = NULL; 493 free(file); 494 } else { 495 *fname = file; 496 } 497 *lineno = num - 1; 498 } 499