xref: /illumos-gate/usr/src/cmd/rpcgen/rpc_util.c (revision a2f144d1)
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_util.c, Utility routines for the RPC protocol compiler
40  */
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <unistd.h>
44 #include <ctype.h>
45 #include <string.h>
46 #include "rpc_scan.h"
47 #include "rpc_parse.h"
48 #include "rpc_util.h"
49 
50 extern void crash(void);
51 
52 static void printwhere(void);
53 
54 #define	ARGEXT "argument"
55 
56 char curline[MAXLINESIZE];	/* current read line */
57 char *where = curline;		/* current point in line */
58 int linenum = 0;		/* current line number */
59 
60 char *infilename;		/* input filename */
61 
62 #define	NFILES   15
63 char *outfiles[NFILES];		/* output file names */
64 int nfiles;
65 
66 FILE *fout;			/* file pointer of current output */
67 FILE *fin;			/* file pointer of current input */
68 
69 list *defined;			/* list of defined things */
70 
71 /*
72  * Reinitialize the world
73  */
74 void
reinitialize(void)75 reinitialize(void)
76 {
77 	(void) memset(curline, 0, MAXLINESIZE);
78 	where = curline;
79 	linenum = 0;
80 	defined = NULL;
81 }
82 
83 /*
84  * string equality
85  */
86 int
streq(char * a,char * b)87 streq(char *a, char *b)
88 {
89 	return (strcmp(a, b) == 0);
90 }
91 
92 /*
93  * find a value in a list
94  */
95 definition *
findval(list * lst,char * val,int (* cmp)())96 findval(list *lst, char *val, int (*cmp)())
97 {
98 	for (; lst != NULL; lst = lst->next) {
99 		if ((*cmp) (lst->val, val))
100 			return (lst->val);
101 	}
102 	return (NULL);
103 }
104 
105 /*
106  * store a value in a list
107  */
108 void
storeval(list ** lstp,definition * val)109 storeval(list **lstp, definition *val)
110 {
111 	list **l;
112 	list *lst;
113 
114 	for (l = lstp; *l != NULL; l = (list **)&(*l)->next)
115 		/* LOOP */;
116 	lst = calloc(1, sizeof (list));
117 	lst->val = val;
118 	lst->next = NULL;
119 	*l = lst;
120 }
121 
122 static int
findit(definition * def,char * type)123 findit(definition *def, char *type)
124 {
125 	return (streq(def->def_name, type));
126 }
127 
128 static char *
fixit(char * type,char * orig)129 fixit(char *type, char *orig)
130 {
131 	definition *def;
132 
133 	def = (definition *)FINDVAL(defined, type, findit);
134 	if (def == NULL || def->def_kind != DEF_TYPEDEF)
135 		return (orig);
136 	switch (def->def.ty.rel) {
137 	case REL_VECTOR:
138 		if (streq(def->def.ty.old_type, "opaque"))
139 			return ("char");
140 		return (def->def.ty.old_type);
141 
142 	case REL_ALIAS:
143 		return (fixit(def->def.ty.old_type, orig));
144 	default:
145 		return (orig);
146 	}
147 }
148 
149 char *
fixtype(char * type)150 fixtype(char *type)
151 {
152 	return (fixit(type, type));
153 }
154 
155 char *
stringfix(char * type)156 stringfix(char *type)
157 {
158 	if (streq(type, "string"))
159 		return ("wrapstring");
160 	return (type);
161 }
162 
163 void
ptype(char * prefix,char * type,int follow)164 ptype(char *prefix, char *type, int follow)
165 {
166 	if (prefix != NULL) {
167 		if (streq(prefix, "enum")) {
168 			f_print(fout, "enum ");
169 		} else {
170 			f_print(fout, "struct ");
171 		}
172 	}
173 	if (streq(type, "bool")) {
174 		f_print(fout, "bool_t ");
175 	} else if (streq(type, "string")) {
176 		f_print(fout, "char *");
177 	} else if (streq(type, "oneway")) {
178 		f_print(fout, "void ");
179 	} else {
180 		f_print(fout, "%s ", follow ? fixtype(type) : type);
181 	}
182 }
183 
184 static int
typedefed(definition * def,char * type)185 typedefed(definition *def, char *type)
186 {
187 	if (def->def_kind != DEF_TYPEDEF || def->def.ty.old_prefix != NULL)
188 		return (0);
189 	return (streq(def->def_name, type));
190 }
191 
192 int
isvectordef(char * type,relation rel)193 isvectordef(char *type, relation rel)
194 {
195 	definition *def;
196 
197 	for (;;) {
198 		switch (rel) {
199 		case REL_VECTOR:
200 			return (!streq(type, "string"));
201 		case REL_ARRAY:
202 			return (0);
203 		case REL_POINTER:
204 			return (0);
205 		case REL_ALIAS:
206 			def = (definition *)FINDVAL(defined, type, typedefed);
207 			if (def == NULL)
208 				return (0);
209 			type = def->def.ty.old_type;
210 			rel = def->def.ty.rel;
211 		}
212 	}
213 }
214 
215 char *
locase(char * str)216 locase(char *str)
217 {
218 	char c;
219 	static char buf[100];
220 	char *p = buf;
221 
222 	while (c = *str++)
223 		*p++ = (c >= 'A' && c <= 'Z') ? (c - 'A' + 'a') : c;
224 	*p = 0;
225 	return (buf);
226 }
227 
228 void
pvname_svc(char * pname,char * vnum)229 pvname_svc(char *pname, char *vnum)
230 {
231 	f_print(fout, "%s_%s_svc", locase(pname), vnum);
232 }
233 
234 void
pvname(char * pname,char * vnum)235 pvname(char *pname, char *vnum)
236 {
237 	f_print(fout, "%s_%s", locase(pname), vnum);
238 }
239 
240 /*
241  * print a useful (?) error message, and then die
242  */
243 void
error(char * msg)244 error(char *msg)
245 {
246 	printwhere();
247 	f_print(stderr, "%s, line %d: ", infilename, linenum);
248 	f_print(stderr, "%s\n", msg);
249 	crash();
250 }
251 
252 /*
253  * Something went wrong, unlink any files that we may have created and then
254  * die.
255  */
256 void
crash(void)257 crash(void)
258 {
259 	int i;
260 
261 	for (i = 0; i < nfiles; i++)
262 		(void) unlink(outfiles[i]);
263 	exit(1);
264 }
265 
266 void
record_open(char * file)267 record_open(char *file)
268 {
269 	if (nfiles < NFILES) {
270 		outfiles[nfiles++] = file;
271 		return;
272 	}
273 	f_print(stderr, "too many files!\n");
274 	crash();
275 }
276 
277 static char expectbuf[100];
278 static char *toktostr();
279 
280 /*
281  * error, token encountered was not the expected one
282  */
283 void
expected1(tok_kind exp1)284 expected1(tok_kind exp1)
285 {
286 	(void) snprintf(expectbuf,
287 	    sizeof (expectbuf), "expected '%s'", toktostr(exp1));
288 	error(expectbuf);
289 }
290 
291 /*
292  * error, token encountered was not one of two expected ones
293  */
294 void
expected2(tok_kind exp1,tok_kind exp2)295 expected2(tok_kind exp1, tok_kind exp2)
296 {
297 	(void) snprintf(expectbuf,
298 	    sizeof (expectbuf), "expected '%s' or '%s'", toktostr(exp1),
299 	    toktostr(exp2));
300 	error(expectbuf);
301 }
302 
303 /*
304  * error, token encountered was not one of 3 expected ones
305  */
306 void
expected3(tok_kind exp1,tok_kind exp2,tok_kind exp3)307 expected3(tok_kind exp1, tok_kind exp2, tok_kind exp3)
308 {
309 	(void) snprintf(expectbuf,
310 	    sizeof (expectbuf), "expected '%s', '%s' or '%s'",
311 	    toktostr(exp1), toktostr(exp2), toktostr(exp3));
312 	error(expectbuf);
313 }
314 
315 void
tabify(FILE * f,int tab)316 tabify(FILE *f, int tab)
317 {
318 	while (tab--)
319 		(void) fputc('\t', f);
320 }
321 
322 static token tokstrings[] = {
323 			{TOK_IDENT, "identifier"},
324 			{TOK_CONST, "const"},
325 			{TOK_RPAREN, ")"},
326 			{TOK_LPAREN, "("},
327 			{TOK_RBRACE, "}"},
328 			{TOK_LBRACE, "{"},
329 			{TOK_LBRACKET, "["},
330 			{TOK_RBRACKET, "]"},
331 			{TOK_STAR, "*"},
332 			{TOK_COMMA, ","},
333 			{TOK_EQUAL, "="},
334 			{TOK_COLON, ":"},
335 			{TOK_SEMICOLON, ";"},
336 			{TOK_UNION, "union"},
337 			{TOK_STRUCT, "struct"},
338 			{TOK_SWITCH, "switch"},
339 			{TOK_CASE, "case"},
340 			{TOK_DEFAULT, "default"},
341 			{TOK_ENUM, "enum"},
342 			{TOK_TYPEDEF, "typedef"},
343 			{TOK_INT, "int"},
344 			{TOK_SHORT, "short"},
345 			{TOK_LONG, "long"},
346 			{TOK_UNSIGNED, "unsigned"},
347 			{TOK_DOUBLE, "double"},
348 			{TOK_FLOAT, "float"},
349 			{TOK_CHAR, "char"},
350 			{TOK_STRING, "string"},
351 			{TOK_OPAQUE, "opaque"},
352 			{TOK_BOOL, "bool"},
353 			{TOK_VOID, "void"},
354 			{TOK_PROGRAM, "program"},
355 			{TOK_VERSION, "version"},
356 			{TOK_EOF, "??????"}
357 };
358 
359 static char *
toktostr(tok_kind kind)360 toktostr(tok_kind kind)
361 {
362 	token *sp;
363 
364 	for (sp = tokstrings; sp->kind != TOK_EOF && sp->kind != kind; sp++)
365 		/* LOOP */;
366 	return (sp->str);
367 }
368 
369 static void
printbuf(void)370 printbuf(void)
371 {
372 	char c;
373 	int i;
374 	int cnt;
375 
376 #define	TABSIZE 4
377 
378 	for (i = 0; (c = curline[i]) != '\0'; i++) {
379 		if (c == '\t') {
380 			cnt = 8 - (i % TABSIZE);
381 			c = ' ';
382 		} else {
383 			cnt = 1;
384 		}
385 		while (cnt--)
386 			(void) fputc(c, stderr);
387 	}
388 }
389 
390 static void
printwhere(void)391 printwhere(void)
392 {
393 	int i;
394 	char c;
395 	int cnt;
396 
397 	printbuf();
398 	for (i = 0; i < where - curline; i++) {
399 		c = curline[i];
400 		if (c == '\t') {
401 			cnt = 8 - (i % TABSIZE);
402 		} else {
403 			cnt = 1;
404 		}
405 		while (cnt--)
406 			(void) fputc('^', stderr);
407 	}
408 	(void) fputc('\n', stderr);
409 }
410 
411 char *
make_argname(char * pname,char * vname)412 make_argname(char *pname, char *vname)
413 {
414 	char *name;
415 	size_t nlen;
416 
417 	nlen = strlen(pname) + strlen(vname) + strlen(ARGEXT) + 3;
418 	name = malloc(nlen);
419 	if (name == NULL) {
420 		(void) fprintf(stderr, "failed in malloc");
421 		exit(1);
422 	}
423 	(void) snprintf(name, nlen, "%s_%s_%s", locase(pname), vname, ARGEXT);
424 	return (name);
425 }
426 
427 bas_type *typ_list_h;
428 bas_type *typ_list_t;
429 
430 void
add_type(int len,char * type)431 add_type(int len, char *type)
432 {
433 	bas_type *ptr;
434 
435 	if ((ptr = malloc(sizeof (bas_type))) == NULL) {
436 		(void) fprintf(stderr, "failed in malloc");
437 		exit(1);
438 	}
439 
440 	ptr->name = type;
441 	ptr->length = len;
442 	ptr->next = NULL;
443 	if (typ_list_t == NULL) {
444 		typ_list_t = ptr;
445 		typ_list_h = ptr;
446 	} else {
447 		typ_list_t->next = ptr;
448 		typ_list_t = ptr;
449 	}
450 }
451 
452 
453 bas_type *
find_type(char * type)454 find_type(char *type)
455 {
456 	bas_type *ptr;
457 
458 	ptr = typ_list_h;
459 	while (ptr != NULL) {
460 		if (strcmp(ptr->name, type) == 0)
461 			return (ptr);
462 		ptr = ptr->next;
463 	}
464 	return (NULL);
465 }
466