xref: /titanic_51/usr/src/cmd/rpcgen/rpc_parse.c (revision bbaa8b60dd95d714741fc474adad3cf710ef4efd)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
27 /* All Rights Reserved */
28 /*
29  * University Copyright- Copyright (c) 1982, 1986, 1988
30  * The Regents of the University of California
31  * All Rights Reserved
32  *
33  * University Acknowledgment- Portions of this document are derived from
34  * software developed by the University of California, Berkeley, and its
35  * contributors.
36  */
37 
38 /*
39  * rpc_parse.c, Parser for the RPC protocol compiler
40  */
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <string.h>
44 #include "rpc/types.h"
45 #include "rpc_scan.h"
46 #include "rpc_parse.h"
47 #include "rpc_util.h"
48 
49 #define	ARGNAME "arg"
50 
51 extern char *make_argname(char *, char *);
52 
53 static void isdefined(definition *);
54 static void def_struct(definition *);
55 static void def_program(definition *);
56 static void def_enum(definition *);
57 static void def_const(definition *);
58 static void def_union(definition *);
59 static void def_typedef(definition *);
60 static void get_declaration(declaration *, defkind);
61 static void get_prog_declaration(declaration *, defkind, int);
62 static void get_type(char **, char **, defkind);
63 static void unsigned_dec(char **);
64 
65 /*
66  * return the next definition you see
67  */
68 definition *
69 get_definition(void)
70 {
71 	definition *defp;
72 	token tok;
73 
74 	defp = calloc(1, sizeof (definition));
75 	get_token(&tok);
76 	switch (tok.kind) {
77 	case TOK_STRUCT:
78 		def_struct(defp);
79 		break;
80 	case TOK_UNION:
81 		def_union(defp);
82 		break;
83 	case TOK_TYPEDEF:
84 		def_typedef(defp);
85 		break;
86 	case TOK_ENUM:
87 		def_enum(defp);
88 		break;
89 	case TOK_PROGRAM:
90 		def_program(defp);
91 		break;
92 	case TOK_CONST:
93 		def_const(defp);
94 		break;
95 	case TOK_EOF:
96 		return (NULL);
97 	default:
98 		error("definition keyword expected");
99 	}
100 	scan(TOK_SEMICOLON, &tok);
101 	isdefined(defp);
102 	return (defp);
103 }
104 
105 static void
106 isdefined(definition *defp)
107 {
108 	STOREVAL(&defined, defp);
109 }
110 
111 /*
112  * We treat s == NULL the same as *s == '\0'
113  */
114 static int
115 streqn(const char *s1, const char *s2)
116 {
117 	if (s1 == NULL)
118 		s1 = "";
119 	if (s2 == NULL)
120 		s2 = "";
121 	if (s1 == s2)
122 		return (1);
123 
124 	return (strcmp(s1, s2) == 0);
125 }
126 
127 static int
128 cmptype(definition *defp, char *type)
129 {
130 	/* We only want typedef definitions */
131 	if (streq(defp->def_name, type) && defp->def_kind == DEF_TYPEDEF)
132 		return (1);
133 	return (0);
134 }
135 
136 static int
137 check_self_reference(const char *name, const declaration *decp, int first)
138 {
139 	/*
140 	 * Now check for the following special case if first is true:
141 	 *
142 	 * struct foo {
143 	 *	...
144 	 *	foo *next;
145 	 * };
146 	 *
147 	 *
148 	 * In the above cases foo has not yet been entered in the type list,
149 	 * defined. So there is no typedef entry. The prefix in that case
150 	 * could be empty.
151 	 */
152 	if (decp->rel == REL_POINTER &&
153 	    (streqn(decp->prefix, "struct") ||
154 	    (first && streqn(decp->prefix, ""))) &&
155 	    streqn(name, decp->type))
156 		return (1);
157 	return (0);
158 }
159 
160 static int
161 is_self_reference(definition *defp, declaration *decp)
162 {
163 	declaration current;
164 	definition *dp;
165 
166 	if (check_self_reference(defp->def_name, decp, 1))
167 		return (1);
168 
169 	/*
170 	 * Check for valid declaration:
171 	 * Only prefixes allowed are none and struct.
172 	 * Only relations allowed are pointer or alias.
173 	 */
174 	if (!streqn(decp->prefix, "struct") && !streqn(decp->prefix, ""))
175 		return (0);
176 	if (decp->rel != REL_POINTER && decp->rel != REL_ALIAS)
177 		return (0);
178 
179 	current.rel = decp->rel;
180 	current.prefix = decp->prefix;
181 	current.type = decp->type;
182 	current.name = decp->name;
183 	decp = &current;
184 	while (!check_self_reference(defp->def_name, decp, 0)) {
185 		dp = FINDVAL(defined, decp->type, cmptype);
186 
187 		/*
188 		 * Check if we found a definition.
189 		 */
190 		if (dp == NULL)
191 			return (0);
192 
193 		/*
194 		 * Check for valid prefix. We eventually need to see one
195 		 * and only one struct.
196 		 */
197 		if (streqn(decp->prefix, "")) {
198 			/*
199 			 * If the current declaration prefix in empty
200 			 * then the definition found must have an empty
201 			 * prefix or a struct prefix
202 			 */
203 			if (!streqn(dp->def.ty.old_prefix, "") &&
204 			    !streqn(dp->def.ty.old_prefix, "struct"))
205 				return (0);
206 		} else if (streqn(decp->prefix, "struct") &&
207 		    !streqn(dp->def.ty.old_prefix, ""))
208 			/*
209 			 * if the current prefix is struct tne new prefix
210 			 * must be empty
211 			 */
212 			return (0);
213 		else if (!streqn(decp->prefix, "struct"))
214 			/* Should never get here */
215 			return (0);
216 
217 		/*
218 		 * Check for valid relation. We need to see one and
219 		 * only one REL_POINTER. The only valid relation types
220 		 * are REL_POINTER and REL_ALIAS.
221 		 */
222 		if (decp->rel == REL_POINTER && dp->def.ty.rel != REL_ALIAS)
223 			return (0);
224 		if (decp->rel == REL_ALIAS &&
225 		    (dp->def.ty.rel != REL_ALIAS &&
226 		    dp->def.ty.rel != REL_POINTER))
227 			return (0);
228 		if (decp->rel != REL_ALIAS && decp->rel != REL_POINTER)
229 			/* Should never get here */
230 			return (0);
231 
232 		/* Set up the current declaration */
233 		if (streqn(decp->prefix, ""))
234 			decp->prefix = dp->def.ty.old_prefix;
235 		decp->type = dp->def.ty.old_type;
236 		if (decp->rel == REL_ALIAS)
237 			decp->rel = dp->def.ty.rel;
238 	}
239 
240 	/* We have a self reference type */
241 	return (1);
242 }
243 
244 static void
245 def_struct(definition *defp)
246 {
247 	token tok;
248 	declaration dec;
249 	decl_list *decls;
250 	decl_list **tailp, *endp;
251 
252 	defp->def_kind = DEF_STRUCT;
253 
254 	scan(TOK_IDENT, &tok);
255 	defp->def_name = tok.str;
256 	scan(TOK_LBRACE, &tok);
257 	tailp = &defp->def.st.decls;
258 	defp->def.st.tail = NULL;
259 	do {
260 		get_declaration(&dec, DEF_STRUCT);
261 		decls = calloc(1, sizeof (decl_list));
262 		decls->decl = dec;
263 		/*
264 		 * Keep a referenct to the last declaration to check for
265 		 * tail recurrsion.
266 		 */
267 		endp = *tailp = decls;
268 		tailp = &decls->next;
269 		scan(TOK_SEMICOLON, &tok);
270 		peek(&tok);
271 	} while (tok.kind != TOK_RBRACE);
272 	*tailp = NULL;
273 	/*
274 	 * Check for tail recurse. If the last declaration refers to this
275 	 * structure then mark this stucture to convert the tail recursion
276 	 * to itteration.
277 	 */
278 	defp->def.st.self_pointer = is_self_reference(defp, &endp->decl);
279 	get_token(&tok);
280 	defp->def.st.tail = endp;
281 }
282 
283 static void
284 def_program(definition *defp)
285 {
286 	token tok;
287 	declaration dec;
288 	decl_list *decls;
289 	decl_list **tailp;
290 	version_list *vlist;
291 	version_list **vtailp;
292 	proc_list *plist;
293 	proc_list **ptailp;
294 	int num_args;
295 	bool_t isvoid = FALSE;	/* whether first argument is void */
296 	defp->def_kind = DEF_PROGRAM;
297 	scan(TOK_IDENT, &tok);
298 	defp->def_name = tok.str;
299 	scan(TOK_LBRACE, &tok);
300 	vtailp = &defp->def.pr.versions;
301 	tailp = &defp->def.st.decls;
302 	scan(TOK_VERSION, &tok);
303 	do {
304 		scan(TOK_IDENT, &tok);
305 		vlist = calloc(1, sizeof (version_list));
306 		vlist->vers_name = tok.str;
307 		scan(TOK_LBRACE, &tok);
308 		ptailp = &vlist->procs;
309 		do {
310 			/* get result type */
311 			plist = calloc(1, sizeof (proc_list));
312 			get_type(&plist->res_prefix, &plist->res_type,
313 			    DEF_RESULT);
314 			if (streq(plist->res_type, "opaque")) {
315 				error("illegal result type");
316 			}
317 			scan(TOK_IDENT, &tok);
318 			plist->proc_name = tok.str;
319 			scan(TOK_LPAREN, &tok);
320 			/* get args - first one */
321 			num_args = 1;
322 			isvoid = FALSE;
323 			/*
324 			 * type of DEF_PROGRAM in the first
325 			 * get_prog_declaration and DEF_STURCT in the next
326 			 * allows void as argument if it is the only argument
327 			 */
328 			get_prog_declaration(&dec, DEF_PROGRAM, num_args);
329 			if (streq(dec.type, "void"))
330 				isvoid = TRUE;
331 			decls = calloc(1, sizeof (decl_list));
332 			plist->args.decls = decls;
333 			decls->decl = dec;
334 			tailp = &decls->next;
335 			/* get args */
336 			while (peekscan(TOK_COMMA, &tok)) {
337 				num_args++;
338 				get_prog_declaration(&dec, DEF_STRUCT,
339 				    num_args);
340 				decls = calloc(1, sizeof (decl_list));
341 				decls->decl = dec;
342 				*tailp = decls;
343 				if (streq(dec.type, "void"))
344 					isvoid = TRUE;
345 				tailp = &decls->next;
346 			}
347 			/* multiple arguments are only allowed in newstyle */
348 			if (!newstyle && num_args > 1) {
349 				error("only one argument is allowed");
350 			}
351 			if (isvoid && num_args > 1) {
352 				error("illegal use of void "
353 				    "in program definition");
354 			}
355 			*tailp = NULL;
356 			scan(TOK_RPAREN, &tok);
357 			scan(TOK_EQUAL, &tok);
358 			scan_num(&tok);
359 			scan(TOK_SEMICOLON, &tok);
360 			plist->proc_num = tok.str;
361 			plist->arg_num = num_args;
362 			*ptailp = plist;
363 			ptailp = &plist->next;
364 			peek(&tok);
365 		} while (tok.kind != TOK_RBRACE);
366 		*ptailp = NULL;
367 		*vtailp = vlist;
368 		vtailp = &vlist->next;
369 		scan(TOK_RBRACE, &tok);
370 		scan(TOK_EQUAL, &tok);
371 		scan_num(&tok);
372 		vlist->vers_num = tok.str;
373 		/* make the argument structure name for each arg */
374 		for (plist = vlist->procs; plist != NULL; plist = plist->next) {
375 			plist->args.argname = make_argname(plist->proc_name,
376 			    vlist->vers_num);
377 			/* free the memory ?? */
378 		}
379 		scan(TOK_SEMICOLON, &tok);
380 		scan2(TOK_VERSION, TOK_RBRACE, &tok);
381 	} while (tok.kind == TOK_VERSION);
382 	scan(TOK_EQUAL, &tok);
383 	scan_num(&tok);
384 	defp->def.pr.prog_num = tok.str;
385 	*vtailp = NULL;
386 }
387 
388 static void
389 def_enum(definition *defp)
390 {
391 	token tok;
392 	enumval_list *elist;
393 	enumval_list **tailp;
394 
395 	defp->def_kind = DEF_ENUM;
396 	scan(TOK_IDENT, &tok);
397 	defp->def_name = tok.str;
398 	scan(TOK_LBRACE, &tok);
399 	tailp = &defp->def.en.vals;
400 	do {
401 		scan(TOK_IDENT, &tok);
402 		elist = calloc(1, sizeof (enumval_list));
403 		elist->name = tok.str;
404 		elist->assignment = NULL;
405 		scan3(TOK_COMMA, TOK_RBRACE, TOK_EQUAL, &tok);
406 		if (tok.kind == TOK_EQUAL) {
407 			scan_num(&tok);
408 			elist->assignment = tok.str;
409 			scan2(TOK_COMMA, TOK_RBRACE, &tok);
410 		}
411 		*tailp = elist;
412 		tailp = &elist->next;
413 	} while (tok.kind != TOK_RBRACE);
414 	*tailp = NULL;
415 }
416 
417 static void
418 def_const(definition *defp)
419 {
420 	token tok;
421 
422 	defp->def_kind = DEF_CONST;
423 	scan(TOK_IDENT, &tok);
424 	defp->def_name = tok.str;
425 	scan(TOK_EQUAL, &tok);
426 	scan2(TOK_IDENT, TOK_STRCONST, &tok);
427 	defp->def.co = tok.str;
428 }
429 
430 static void
431 def_union(definition *defp)
432 {
433 	token tok;
434 	declaration dec;
435 	case_list *cases;
436 	case_list **tailp;
437 	int flag;
438 
439 	defp->def_kind = DEF_UNION;
440 	scan(TOK_IDENT, &tok);
441 	defp->def_name = tok.str;
442 	scan(TOK_SWITCH, &tok);
443 	scan(TOK_LPAREN, &tok);
444 	get_declaration(&dec, DEF_UNION);
445 	defp->def.un.enum_decl = dec;
446 	tailp = &defp->def.un.cases;
447 	scan(TOK_RPAREN, &tok);
448 	scan(TOK_LBRACE, &tok);
449 	scan(TOK_CASE, &tok);
450 	while (tok.kind == TOK_CASE) {
451 		scan2(TOK_IDENT, TOK_CHARCONST, &tok);
452 		cases = calloc(1, sizeof (case_list));
453 		cases->case_name = tok.str;
454 		scan(TOK_COLON, &tok);
455 		/* now peek at next token */
456 		flag = 0;
457 		if (peekscan(TOK_CASE, &tok)) {
458 			do {
459 				scan2(TOK_IDENT, TOK_CHARCONST, &tok);
460 				cases->contflag = 1;
461 				/* continued case statement */
462 				*tailp = cases;
463 				tailp = &cases->next;
464 				cases = calloc(1, sizeof (case_list));
465 				cases->case_name = tok.str;
466 				scan(TOK_COLON, &tok);
467 			} while (peekscan(TOK_CASE, &tok));
468 		} else if (flag) {
469 			*tailp = cases;
470 			tailp = &cases->next;
471 			cases = calloc(1, sizeof (case_list));
472 		}
473 
474 		get_declaration(&dec, DEF_UNION);
475 		cases->case_decl = dec;
476 		cases->contflag = 0; /* no continued case statement */
477 		*tailp = cases;
478 		tailp = &cases->next;
479 		scan(TOK_SEMICOLON, &tok);
480 
481 		scan3(TOK_CASE, TOK_DEFAULT, TOK_RBRACE, &tok);
482 	}
483 	*tailp = NULL;
484 	if (tok.kind == TOK_DEFAULT) {
485 		scan(TOK_COLON, &tok);
486 		get_declaration(&dec, DEF_UNION);
487 		defp->def.un.default_decl = calloc(1, sizeof (declaration));
488 		*defp->def.un.default_decl = dec;
489 		scan(TOK_SEMICOLON, &tok);
490 		scan(TOK_RBRACE, &tok);
491 	} else {
492 		defp->def.un.default_decl = NULL;
493 	}
494 }
495 
496 static char *reserved_words[] = {
497 	"array",
498 	"bytes",
499 	"destroy",
500 	"free",
501 	"getpos",
502 	"inline",
503 	"pointer",
504 	"reference",
505 	"setpos",
506 	"sizeof",
507 	"union",
508 	"vector",
509 	NULL
510 };
511 
512 static char *reserved_types[] = {
513 	"opaque",
514 	"string",
515 	NULL
516 };
517 
518 /*
519  * check that the given name is not one that would eventually result in
520  * xdr routines that would conflict with internal XDR routines.
521  */
522 static void
523 check_type_name(char *name, int new_type)
524 {
525 	int i;
526 	char tmp[100];
527 
528 	for (i = 0; reserved_words[i] != NULL; i++) {
529 		if (strcmp(name, reserved_words[i]) == 0) {
530 			(void) snprintf(tmp, sizeof (tmp),
531 			    "illegal (reserved) name :\'%s\' "
532 			    "in type definition",
533 			    name);
534 			error(tmp);
535 		}
536 	}
537 	if (new_type) {
538 		for (i = 0; reserved_types[i] != NULL; i++) {
539 			if (strcmp(name, reserved_types[i]) == 0) {
540 				(void) snprintf(tmp, sizeof (tmp),
541 				    "illegal (reserved) name :\'%s\' "
542 				    "in type definition",
543 				    name);
544 				error(tmp);
545 			}
546 		}
547 	}
548 }
549 
550 static void
551 def_typedef(definition *defp)
552 {
553 	declaration dec;
554 
555 	defp->def_kind = DEF_TYPEDEF;
556 	get_declaration(&dec, DEF_TYPEDEF);
557 	defp->def_name = dec.name;
558 	check_type_name(dec.name, 1);
559 	defp->def.ty.old_prefix = dec.prefix;
560 	defp->def.ty.old_type = dec.type;
561 	defp->def.ty.rel = dec.rel;
562 	defp->def.ty.array_max = dec.array_max;
563 }
564 
565 static void
566 get_declaration(declaration *dec, defkind dkind)
567 {
568 	token tok;
569 
570 	get_type(&dec->prefix, &dec->type, dkind);
571 	dec->rel = REL_ALIAS;
572 	if (streq(dec->type, "void"))
573 		return;
574 
575 	check_type_name(dec->type, 0);
576 	scan2(TOK_STAR, TOK_IDENT, &tok);
577 	if (tok.kind == TOK_STAR) {
578 		dec->rel = REL_POINTER;
579 		scan(TOK_IDENT, &tok);
580 	}
581 	dec->name = tok.str;
582 	if (peekscan(TOK_LBRACKET, &tok)) {
583 		if (dec->rel == REL_POINTER)
584 			error("no array-of-pointer declarations "
585 			    "-- use typedef");
586 		dec->rel = REL_VECTOR;
587 		scan_num(&tok);
588 		dec->array_max = tok.str;
589 		scan(TOK_RBRACKET, &tok);
590 	} else if (peekscan(TOK_LANGLE, &tok)) {
591 		if (dec->rel == REL_POINTER)
592 			error("no array-of-pointer declarations "
593 			    "-- use typedef");
594 		dec->rel = REL_ARRAY;
595 		if (peekscan(TOK_RANGLE, &tok)) {
596 			dec->array_max = "~0";	/* unspecified size, use max */
597 		} else {
598 			scan_num(&tok);
599 			dec->array_max = tok.str;
600 			scan(TOK_RANGLE, &tok);
601 		}
602 	}
603 	if (streq(dec->type, "opaque")) {
604 		if (dec->rel != REL_ARRAY && dec->rel != REL_VECTOR) {
605 			error("array declaration expected");
606 		}
607 	} else if (streq(dec->type, "string")) {
608 		if (dec->rel != REL_ARRAY) {
609 			error("variable-length array declaration expected");
610 		}
611 	}
612 }
613 
614 static void
615 get_prog_declaration(declaration *dec, defkind dkind, int num)
616 {
617 	token tok;
618 	char name[sizeof (ARGNAME) + 10];
619 
620 	if (dkind == DEF_PROGRAM) {
621 		peek(&tok);
622 		if (tok.kind == TOK_RPAREN) { /* no arguments */
623 			dec->rel = REL_ALIAS;
624 			dec->type = "void";
625 			dec->prefix = NULL;
626 			dec->name = NULL;
627 			return;
628 		}
629 	}
630 	get_type(&dec->prefix, &dec->type, dkind);
631 	dec->rel = REL_ALIAS;
632 	if (peekscan(TOK_IDENT, &tok)) /* optional name of argument */
633 		dec->name = strdup(tok.str);
634 	else {
635 		/* default name of argument */
636 		(void) snprintf(name, sizeof (name), "%s%d", ARGNAME, num);
637 		dec->name = strdup(name);
638 	}
639 	if (dec->name == NULL)
640 		error("internal error -- out of memory");
641 
642 	if (streq(dec->type, "void"))
643 		return;
644 
645 	if (streq(dec->type, "opaque"))
646 		error("opaque -- illegal argument type");
647 	if (peekscan(TOK_STAR, &tok)) {
648 		if (streq(dec->type, "string")) {
649 			error("pointer to string not allowed "
650 			    "in program arguments\n");
651 		}
652 		dec->rel = REL_POINTER;
653 		if (peekscan(TOK_IDENT, &tok))
654 			/* optional name of argument */
655 			dec->name = strdup(tok.str);
656 	}
657 	if (peekscan(TOK_LANGLE, &tok)) {
658 		if (!streq(dec->type, "string")) {
659 			error("arrays cannot be declared as arguments "
660 			    "to procedures -- use typedef");
661 		}
662 		dec->rel = REL_ARRAY;
663 		if (peekscan(TOK_RANGLE, &tok)) {
664 			dec->array_max = "~0";
665 			/* unspecified size, use max */
666 		} else {
667 			scan_num(&tok);
668 			dec->array_max = tok.str;
669 			scan(TOK_RANGLE, &tok);
670 		}
671 	}
672 	if (streq(dec->type, "string")) {
673 		if (dec->rel != REL_ARRAY) {
674 			/*
675 			 * .x specifies just string as
676 			 * type of argument
677 			 * - make it string<>
678 			 */
679 			dec->rel = REL_ARRAY;
680 			dec->array_max = "~0"; /* unspecified size, use max */
681 		}
682 	}
683 }
684 
685 static void
686 get_type(char **prefixp, char **typep, defkind dkind)
687 {
688 	token tok;
689 
690 	*prefixp = NULL;
691 	get_token(&tok);
692 	switch (tok.kind) {
693 	case TOK_IDENT:
694 		*typep = tok.str;
695 		break;
696 	case TOK_STRUCT:
697 	case TOK_ENUM:
698 	case TOK_UNION:
699 		*prefixp = tok.str;
700 		scan(TOK_IDENT, &tok);
701 		*typep = tok.str;
702 		break;
703 	case TOK_UNSIGNED:
704 		unsigned_dec(typep);
705 		break;
706 	case TOK_SHORT:
707 		*typep = "short";
708 		(void) peekscan(TOK_INT, &tok);
709 		break;
710 	case TOK_LONG:
711 		*typep = "long";
712 		(void) peekscan(TOK_INT, &tok);
713 		break;
714 	case TOK_HYPER:
715 		*typep = "longlong_t";
716 		(void) peekscan(TOK_INT, &tok);
717 		break;
718 
719 	case TOK_VOID:
720 		if (dkind != DEF_UNION && dkind != DEF_PROGRAM &&
721 		    dkind != DEF_RESULT) {
722 			error("voids allowed only inside union and "
723 			    "program definitions with one argument");
724 		}
725 		*typep = tok.str;
726 		break;
727 	case TOK_ONEWAY:
728 		if (dkind != DEF_RESULT) {
729 			error("oneways allowed only inside result definitions");
730 		}
731 		*typep = tok.str;
732 		break;
733 	case TOK_STRING:
734 	case TOK_OPAQUE:
735 	case TOK_CHAR:
736 	case TOK_INT:
737 	case TOK_FLOAT:
738 	case TOK_DOUBLE:
739 	case TOK_BOOL:
740 	case TOK_QUAD:
741 		*typep = tok.str;
742 		break;
743 	default:
744 		error("expected type specifier");
745 	}
746 }
747 
748 static void
749 unsigned_dec(char **typep)
750 {
751 	token tok;
752 
753 	peek(&tok);
754 	switch (tok.kind) {
755 	case TOK_CHAR:
756 		get_token(&tok);
757 		*typep = "u_char";
758 		break;
759 	case TOK_SHORT:
760 		get_token(&tok);
761 		*typep = "u_short";
762 		(void) peekscan(TOK_INT, &tok);
763 		break;
764 	case TOK_LONG:
765 		get_token(&tok);
766 		*typep = "u_long";
767 		(void) peekscan(TOK_INT, &tok);
768 		break;
769 	case TOK_HYPER:
770 		get_token(&tok);
771 		*typep = "u_longlong_t";
772 		(void) peekscan(TOK_INT, &tok);
773 		break;
774 	case TOK_INT:
775 		get_token(&tok);
776 		*typep = "u_int";
777 		break;
778 	default:
779 		*typep = "u_int";
780 		break;
781 	}
782 }
783