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 /*
39 * rpc_scan.c, Scanner for the RPC protocol compiler
40 * Copyright (C) 1987, Sun Microsystems, Inc.
41 */
42
43 #include <sys/types.h>
44
45 #include <sys/wait.h>
46 #include <stdio.h>
47 #include <ctype.h>
48 #include <string.h>
49 #include "rpc_parse.h"
50 #include "rpc_scan.h"
51 #include "rpc_util.h"
52
53 #define startcomment(where) (where[0] == '/' && where[1] == '*')
54 #define endcomment(where) (where[-1] == '*' && where[0] == '/')
55
56 static int pushed = 0; /* is a token pushed */
57 static token lasttok; /* last token, if pushed */
58
59 static void unget_token( token * );
60 static void findstrconst(char **, const char **);
61 static void findchrconst(char **, const char **);
62 static void findconst(char **, const char **);
63 static void findkind( char **, token * );
64 static int cppline( char * );
65 static int directive( char * );
66 static void printdirective( char * );
67 static void docppline(char *, int *, const char **);
68
69 /*
70 * scan expecting 1 given token
71 */
72 void
scan(tok_kind expect,token * tokp)73 scan(tok_kind expect, token *tokp)
74 {
75 get_token(tokp);
76 if (tokp->kind != expect) {
77 expected1(expect);
78 }
79 }
80
81 /*
82 * scan expecting any of the 2 given tokens
83 */
84 void
scan2(tok_kind expect1,tok_kind expect2,token * tokp)85 scan2(tok_kind expect1, tok_kind expect2, token *tokp)
86 {
87 get_token(tokp);
88 if (tokp->kind != expect1 && tokp->kind != expect2) {
89 expected2(expect1, expect2);
90 }
91 }
92
93 /*
94 * scan expecting any of the 3 given token
95 */
96 void
scan3(tok_kind expect1,tok_kind expect2,tok_kind expect3,token * tokp)97 scan3(tok_kind expect1, tok_kind expect2, tok_kind expect3, token *tokp)
98 {
99 get_token(tokp);
100 if (tokp->kind != expect1 && tokp->kind != expect2
101 && tokp->kind != expect3) {
102 expected3(expect1, expect2, expect3);
103 }
104 }
105
106 /*
107 * scan expecting a constant, possibly symbolic
108 */
109 void
scan_num(token * tokp)110 scan_num(token *tokp)
111 {
112 get_token(tokp);
113 switch (tokp->kind) {
114 case TOK_IDENT:
115 break;
116 default:
117 error("constant or identifier expected");
118 }
119 }
120
121 /*
122 * Peek at the next token
123 */
124 void
peek(token * tokp)125 peek(token *tokp)
126 {
127 get_token(tokp);
128 unget_token(tokp);
129 }
130
131 /*
132 * Peek at the next token and scan it if it matches what you expect
133 */
134 int
peekscan(tok_kind expect,token * tokp)135 peekscan(tok_kind expect, token *tokp)
136 {
137 peek(tokp);
138 if (tokp->kind == expect) {
139 get_token(tokp);
140 return (1);
141 }
142 return (0);
143 }
144
145 /*
146 * Get the next token, printing out any directive that are encountered.
147 */
148 void
get_token(token * tokp)149 get_token(token *tokp)
150 {
151 int commenting;
152 int stat = 0;
153
154
155 if (pushed) {
156 pushed = 0;
157 *tokp = lasttok;
158 return;
159 }
160 commenting = 0;
161 for (;;) {
162 if (*where == 0) {
163 for (;;) {
164 if (!fgets(curline, MAXLINESIZE, fin)) {
165 tokp->kind = TOK_EOF;
166 /* now check if cpp returned non NULL value */
167 waitpid(childpid, &stat, WUNTRACED);
168 if (stat > 0) {
169 /* Set return value from rpcgen */
170 nonfatalerrors = stat >> 8;
171 }
172 *where = 0;
173 return;
174 }
175 linenum++;
176 if (commenting) {
177 break;
178 } else if (cppline(curline)) {
179 docppline(curline, &linenum,
180 &infilename);
181 } else if (directive(curline)) {
182 printdirective(curline);
183 } else {
184 break;
185 }
186 }
187 where = curline;
188 } else if (isspace(*where)) {
189 while (isspace(*where)) {
190 where++; /* eat */
191 }
192 } else if (commenting) {
193 for (where++; *where; where++) {
194 if (endcomment(where)) {
195 where++;
196 commenting--;
197 break;
198 }
199 }
200 } else if (startcomment(where)) {
201 where += 2;
202 commenting++;
203 } else {
204 break;
205 }
206 }
207
208 /*
209 * 'where' is not whitespace, comment or directive Must be a token!
210 */
211 switch (*where) {
212 case ':':
213 tokp->kind = TOK_COLON;
214 where++;
215 break;
216 case ';':
217 tokp->kind = TOK_SEMICOLON;
218 where++;
219 break;
220 case ',':
221 tokp->kind = TOK_COMMA;
222 where++;
223 break;
224 case '=':
225 tokp->kind = TOK_EQUAL;
226 where++;
227 break;
228 case '*':
229 tokp->kind = TOK_STAR;
230 where++;
231 break;
232 case '[':
233 tokp->kind = TOK_LBRACKET;
234 where++;
235 break;
236 case ']':
237 tokp->kind = TOK_RBRACKET;
238 where++;
239 break;
240 case '{':
241 tokp->kind = TOK_LBRACE;
242 where++;
243 break;
244 case '}':
245 tokp->kind = TOK_RBRACE;
246 where++;
247 break;
248 case '(':
249 tokp->kind = TOK_LPAREN;
250 where++;
251 break;
252 case ')':
253 tokp->kind = TOK_RPAREN;
254 where++;
255 break;
256 case '<':
257 tokp->kind = TOK_LANGLE;
258 where++;
259 break;
260 case '>':
261 tokp->kind = TOK_RANGLE;
262 where++;
263 break;
264
265 case '"':
266 tokp->kind = TOK_STRCONST;
267 findstrconst(&where, &tokp->str);
268 break;
269 case '\'':
270 tokp->kind = TOK_CHARCONST;
271 findchrconst(&where, &tokp->str);
272 break;
273
274 case '-':
275 case '0':
276 case '1':
277 case '2':
278 case '3':
279 case '4':
280 case '5':
281 case '6':
282 case '7':
283 case '8':
284 case '9':
285 tokp->kind = TOK_IDENT;
286 findconst(&where, &tokp->str);
287 break;
288
289 default:
290 if (!(isalpha(*where) || *where == '_')) {
291 char buf[100];
292 char *p;
293
294 s_print(buf, "illegal character in file: ");
295 p = buf + strlen(buf);
296 if (isprint(*where)) {
297 s_print(p, "%c", *where);
298 } else {
299 s_print(p, "%d", *where);
300 }
301 error(buf);
302 }
303 findkind(&where, tokp);
304 break;
305 }
306 }
307
308 static void
unget_token(token * tokp)309 unget_token(token *tokp)
310 {
311 lasttok = *tokp;
312 pushed = 1;
313 }
314
315 static void
findstrconst(char ** str,const char ** val)316 findstrconst(char **str, const char **val)
317 {
318 char *p;
319 char *tmp;
320 int size;
321
322 p = *str;
323 do {
324 p++;
325 } while (*p && *p != '"');
326 if (*p == 0) {
327 error("unterminated string constant");
328 }
329 p++;
330 size = p - *str + 1;
331 tmp = xmalloc(size);
332 (void) strlcpy(tmp, *str, size);
333 *val = tmp;
334 *str = p;
335 }
336
337 static void
findchrconst(char ** str,const char ** val)338 findchrconst(char **str, const char **val)
339 {
340 char *p;
341 char *tmp;
342 int size;
343
344 p = *str;
345 do {
346 p++;
347 } while (*p && *p != '\'');
348 if (*p == 0) {
349 error("unterminated string constant");
350 }
351 p++;
352 size = p - *str + 1;
353 if (size != 4) {
354 error("empty char string");
355 }
356 tmp = xmalloc(size);
357 (void) strlcpy(tmp, *str, size);
358 *val = tmp;
359 *str = p;
360 }
361
362 static void
findconst(char ** str,const char ** val)363 findconst(char **str, const char **val)
364 {
365 char *p;
366 char *tmp;
367 int size;
368
369 p = *str;
370 if (*p == '0' && *(p + 1) == 'x') {
371 p++;
372 do {
373 p++;
374 } while (isxdigit(*p));
375 } else {
376 do {
377 p++;
378 } while (isdigit(*p));
379 }
380 size = p - *str + 1;
381 tmp = xmalloc(size);
382 (void) strlcpy(tmp, *str, size);
383 *val = tmp;
384 *str = p;
385 }
386
387 static token symbols[] = {
388 {TOK_CONST, "const"},
389 {TOK_UNION, "union"},
390 {TOK_SWITCH, "switch"},
391 {TOK_CASE, "case"},
392 {TOK_DEFAULT, "default"},
393 {TOK_STRUCT, "struct"},
394 {TOK_TYPEDEF, "typedef"},
395 {TOK_ENUM, "enum"},
396 {TOK_OPAQUE, "opaque"},
397 {TOK_BOOL, "bool"},
398 {TOK_VOID, "void"},
399 {TOK_CHAR, "char"},
400 {TOK_INT, "int"},
401 {TOK_UNSIGNED, "unsigned"},
402 {TOK_SHORT, "short"},
403 {TOK_LONG, "long"},
404 {TOK_HYPER, "hyper"},
405 {TOK_FLOAT, "float"},
406 {TOK_DOUBLE, "double"},
407 {TOK_QUAD, "quadruple"},
408 {TOK_STRING, "string"},
409 {TOK_PROGRAM, "program"},
410 {TOK_VERSION, "version"},
411 {TOK_EOF, "??????"},
412 };
413
414 static void
findkind(char ** mark,token * tokp)415 findkind(char **mark, token *tokp)
416 {
417 int len;
418 token *s;
419 char *str, *tmp;
420
421 str = *mark;
422 for (s = symbols; s->kind != TOK_EOF; s++) {
423 len = strlen(s->str);
424 if (strncmp(str, s->str, len) == 0) {
425 if (!isalnum(str[len]) && str[len] != '_') {
426 tokp->kind = s->kind;
427 tokp->str = s->str;
428 *mark = str + len;
429 return;
430 }
431 }
432 }
433 tokp->kind = TOK_IDENT;
434 for (len = 0; isalnum(str[len]) || str[len] == '_'; len++);
435 tmp = xmalloc(len + 1);
436 (void) strlcpy(tmp, str, len + 1);
437 tokp->str = tmp;
438 *mark = str + len;
439 }
440
441 static int
cppline(char * line)442 cppline(char *line)
443 {
444 return (line == curline && *line == '#');
445 }
446
447 static int
directive(char * line)448 directive(char *line)
449 {
450 return (line == curline && *line == '%');
451 }
452
453 static void
printdirective(char * line)454 printdirective(char *line)
455 {
456 f_print(fout, "%s", line + 1);
457 }
458
459 static void
docppline(char * line,int * lineno,const char ** fname)460 docppline(char *line, int *lineno, const char **fname)
461 {
462 char *file;
463 int num;
464 char *p;
465
466 line++;
467 while (isspace(*line)) {
468 line++;
469 }
470 num = atoi(line);
471 while (isdigit(*line)) {
472 line++;
473 }
474 while (isspace(*line)) {
475 line++;
476 }
477 if (*line != '"') {
478 error("preprocessor error");
479 }
480 line++;
481 p = file = xmalloc(strlen(line) + 1);
482 while (*line && *line != '"') {
483 *p++ = *line++;
484 }
485 if (*line == 0) {
486 error("preprocessor error");
487 }
488 *p = 0;
489 if (*file == 0) {
490 *fname = NULL;
491 free(file);
492 } else {
493 *fname = file;
494 }
495 *lineno = num - 1;
496 }
497