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_cout.c 1.14 93/07/05 SMI"
33 static char sccsid[] = "@(#)rpc_cout.c 1.13 89/02/22 (C) 1987 SMI";
34 #endif
35 #endif
36
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
39
40 /*
41 * rpc_cout.c, XDR routine outputter for the RPC protocol compiler
42 * Copyright (C) 1987, Sun Microsystems, Inc.
43 */
44 #include <ctype.h>
45 #include <stdio.h>
46 #include <string.h>
47 #include "rpc_parse.h"
48 #include "rpc_scan.h"
49 #include "rpc_util.h"
50
51 static void print_header( definition * );
52 static void print_trailer( void );
53 static void print_stat( int , declaration * );
54 static void emit_enum( definition * );
55 static void emit_program( definition * );
56 static void emit_union( definition * );
57 static void emit_struct( definition * );
58 static void emit_typedef( definition * );
59 static void emit_inline( int, declaration *, int );
60 static void emit_single_in_line( int, declaration *, int, relation );
61
62 /*
63 * Emit the C-routine for the given definition
64 */
65 void
emit(definition * def)66 emit(definition *def)
67 {
68 if (def->def_kind == DEF_CONST) {
69 return;
70 }
71 if (def->def_kind == DEF_PROGRAM) {
72 emit_program(def);
73 return;
74 }
75 if (def->def_kind == DEF_TYPEDEF) {
76 /*
77 * now we need to handle declarations like
78 * struct typedef foo foo;
79 * since we dont want this to be expanded into 2 calls to xdr_foo
80 */
81
82 if (strcmp(def->def.ty.old_type, def->def_name) == 0)
83 return;
84 }
85 print_header(def);
86 switch (def->def_kind) {
87 case DEF_UNION:
88 emit_union(def);
89 break;
90 case DEF_ENUM:
91 emit_enum(def);
92 break;
93 case DEF_STRUCT:
94 emit_struct(def);
95 break;
96 case DEF_TYPEDEF:
97 emit_typedef(def);
98 break;
99 /* DEF_CONST and DEF_PROGRAM have already been handled */
100 default:
101 break;
102 }
103 print_trailer();
104 }
105
106 static int
findtype(definition * def,const char * type)107 findtype(definition *def, const char *type)
108 {
109
110 if (def->def_kind == DEF_PROGRAM || def->def_kind == DEF_CONST) {
111 return (0);
112 } else {
113 return (streq(def->def_name, type));
114 }
115 }
116
117 static int
undefined(const char * type)118 undefined(const char *type)
119 {
120 definition *def;
121
122 def = (definition *) FINDVAL(defined, type, findtype);
123 return (def == NULL);
124 }
125
126
127 static void
print_generic_header(const char * procname,int pointerp)128 print_generic_header(const char *procname, int pointerp)
129 {
130 f_print(fout, "\n");
131 f_print(fout, "bool_t\n");
132 f_print(fout, "xdr_%s(", procname);
133 f_print(fout, "XDR *xdrs, ");
134 f_print(fout, "%s ", procname);
135 if (pointerp)
136 f_print(fout, "*");
137 f_print(fout, "objp)\n{\n\n");
138 }
139
140 static void
print_header(definition * def)141 print_header(definition *def)
142 {
143 print_generic_header(def->def_name,
144 def->def_kind != DEF_TYPEDEF ||
145 !isvectordef(def->def.ty.old_type,
146 def->def.ty.rel));
147 /* Now add Inline support */
148
149 if (inline_size == 0)
150 return;
151 /* May cause lint to complain. but ... */
152 f_print(fout, "\tregister long *buf;\n\n");
153 }
154
155 static void
print_prog_header(proc_list * plist)156 print_prog_header(proc_list *plist)
157 {
158 print_generic_header(plist->args.argname, 1);
159 }
160
161 static void
print_trailer(void)162 print_trailer(void)
163 {
164 f_print(fout, "\treturn (TRUE);\n");
165 f_print(fout, "}\n");
166 }
167
168
169 static void
print_ifopen(int indent,const char * name)170 print_ifopen(int indent, const char *name)
171 {
172 tabify(fout, indent);
173 f_print(fout, "if (!xdr_%s(xdrs", name);
174 }
175
176 static void
print_ifarg(const char * arg)177 print_ifarg(const char *arg)
178 {
179 f_print(fout, ", %s", arg);
180 }
181
182 static void
print_ifsizeof(int indent,const char * prefix,const char * type)183 print_ifsizeof(int indent, const char *prefix, const char *type)
184 {
185 if (indent) {
186 f_print(fout, ",\n");
187 tabify(fout, indent);
188 } else {
189 f_print(fout, ", ");
190 }
191 if (streq(type, "bool")) {
192 f_print(fout, "sizeof (bool_t), (xdrproc_t) xdr_bool");
193 } else {
194 f_print(fout, "sizeof (");
195 if (undefined(type) && prefix) {
196 f_print(fout, "%s ", prefix);
197 }
198 f_print(fout, "%s), (xdrproc_t) xdr_%s", type, type);
199 }
200 }
201
202 static void
print_ifclose(int indent,int brace)203 print_ifclose(int indent, int brace)
204 {
205 f_print(fout, "))\n");
206 tabify(fout, indent);
207 f_print(fout, "\treturn (FALSE);\n");
208 if (brace)
209 f_print(fout, "\t}\n");
210 }
211
212 static void
print_ifstat(int indent,const char * prefix,const char * type,relation rel,const char * amax,const char * objname,const char * name)213 print_ifstat(int indent, const char *prefix, const char *type, relation rel,
214 const char *amax, const char *objname, const char *name)
215 {
216 const char *alt = NULL;
217 int brace = 0;
218
219 switch (rel) {
220 case REL_POINTER:
221 brace = 1;
222 f_print(fout, "\t{\n");
223 f_print(fout, "\t%s **pp = %s;\n", type, objname);
224 print_ifopen(indent, "pointer");
225 print_ifarg("(char **)");
226 f_print(fout, "pp");
227 print_ifsizeof(0, prefix, type);
228 break;
229 case REL_VECTOR:
230 if (streq(type, "string")) {
231 alt = "string";
232 } else if (streq(type, "opaque")) {
233 alt = "opaque";
234 }
235 if (alt) {
236 print_ifopen(indent, alt);
237 print_ifarg(objname);
238 } else {
239 print_ifopen(indent, "vector");
240 print_ifarg("(char *)");
241 f_print(fout, "%s", objname);
242 }
243 print_ifarg(amax);
244 if (!alt) {
245 print_ifsizeof(indent + 1, prefix, type);
246 }
247 break;
248 case REL_ARRAY:
249 if (streq(type, "string")) {
250 alt = "string";
251 } else if (streq(type, "opaque")) {
252 alt = "bytes";
253 }
254 if (streq(type, "string")) {
255 print_ifopen(indent, alt);
256 print_ifarg(objname);
257 } else {
258 if (alt) {
259 print_ifopen(indent, alt);
260 } else {
261 print_ifopen(indent, "array");
262 }
263 print_ifarg("(char **)");
264 if (*objname == '&') {
265 f_print(fout, "%s.%s_val, (u_int *) %s.%s_len",
266 objname, name, objname, name);
267 } else {
268 f_print(fout,
269 "&%s->%s_val, (u_int *) &%s->%s_len",
270 objname, name, objname, name);
271 }
272 }
273 print_ifarg(amax);
274 if (!alt) {
275 print_ifsizeof(indent + 1, prefix, type);
276 }
277 break;
278 case REL_ALIAS:
279 print_ifopen(indent, type);
280 print_ifarg(objname);
281 break;
282 }
283 print_ifclose(indent, brace);
284 }
285
286 /* ARGSUSED */
287 static void
emit_enum(definition * def __unused)288 emit_enum(definition *def __unused)
289 {
290 print_ifopen(1, "enum");
291 print_ifarg("(enum_t *)objp");
292 print_ifclose(1, 0);
293 }
294
295 static void
emit_program(definition * def)296 emit_program(definition *def)
297 {
298 decl_list *dl;
299 version_list *vlist;
300 proc_list *plist;
301
302 for (vlist = def->def.pr.versions; vlist != NULL; vlist = vlist->next)
303 for (plist = vlist->procs; plist != NULL; plist = plist->next) {
304 if (!newstyle || plist->arg_num < 2)
305 continue; /* old style, or single argument */
306 print_prog_header(plist);
307 for (dl = plist->args.decls; dl != NULL;
308 dl = dl->next)
309 print_stat(1, &dl->decl);
310 print_trailer();
311 }
312 }
313
314
315 static void
emit_union(definition * def)316 emit_union(definition *def)
317 {
318 declaration *dflt;
319 case_list *cl;
320 declaration *cs;
321 char *object;
322 const char *vecformat = "objp->%s_u.%s";
323 const char *format = "&objp->%s_u.%s";
324
325 print_stat(1, &def->def.un.enum_decl);
326 f_print(fout, "\tswitch (objp->%s) {\n", def->def.un.enum_decl.name);
327 for (cl = def->def.un.cases; cl != NULL; cl = cl->next) {
328
329 f_print(fout, "\tcase %s:\n", cl->case_name);
330 if (cl->contflag == 1) /* a continued case statement */
331 continue;
332 cs = &cl->case_decl;
333 if (!streq(cs->type, "void")) {
334 object = xmalloc(strlen(def->def_name) +
335 strlen(format) + strlen(cs->name) + 1);
336 if (isvectordef (cs->type, cs->rel)) {
337 s_print(object, vecformat, def->def_name,
338 cs->name);
339 } else {
340 s_print(object, format, def->def_name,
341 cs->name);
342 }
343 print_ifstat(2, cs->prefix, cs->type, cs->rel,
344 cs->array_max, object, cs->name);
345 free(object);
346 }
347 f_print(fout, "\t\tbreak;\n");
348 }
349 dflt = def->def.un.default_decl;
350 if (dflt != NULL) {
351 if (!streq(dflt->type, "void")) {
352 f_print(fout, "\tdefault:\n");
353 object = xmalloc(strlen(def->def_name) +
354 strlen(format) + strlen(dflt->name) + 1);
355 if (isvectordef (dflt->type, dflt->rel)) {
356 s_print(object, vecformat, def->def_name,
357 dflt->name);
358 } else {
359 s_print(object, format, def->def_name,
360 dflt->name);
361 }
362
363 print_ifstat(2, dflt->prefix, dflt->type, dflt->rel,
364 dflt->array_max, object, dflt->name);
365 free(object);
366 f_print(fout, "\t\tbreak;\n");
367 } else {
368 f_print(fout, "\tdefault:\n");
369 f_print(fout, "\t\tbreak;\n");
370 }
371 } else {
372 f_print(fout, "\tdefault:\n");
373 f_print(fout, "\t\treturn (FALSE);\n");
374 }
375
376 f_print(fout, "\t}\n");
377 }
378
379 static void
inline_struct(definition * def,int flag)380 inline_struct(definition *def, int flag)
381 {
382 decl_list *dl;
383 int i, size;
384 decl_list *cur, *psav;
385 bas_type *ptr;
386 char *sizestr;
387 const char *plus;
388 char ptemp[256];
389 int indent = 1;
390
391 cur = NULL;
392 if (flag == PUT)
393 f_print(fout, "\n\tif (xdrs->x_op == XDR_ENCODE) {\n");
394 else
395 f_print(fout, "\t\treturn (TRUE);\n\t} else if (xdrs->x_op == XDR_DECODE) {\n");
396
397 i = 0;
398 size = 0;
399 sizestr = NULL;
400 for (dl = def->def.st.decls; dl != NULL; dl = dl->next) { /* xxx */
401 /* now walk down the list and check for basic types */
402 if ((dl->decl.prefix == NULL) &&
403 ((ptr = find_type(dl->decl.type)) != NULL) &&
404 ((dl->decl.rel == REL_ALIAS) ||
405 (dl->decl.rel == REL_VECTOR))){
406 if (i == 0)
407 cur = dl;
408 i++;
409
410 if (dl->decl.rel == REL_ALIAS)
411 size += ptr->length;
412 else {
413 /* this code is required to handle arrays */
414 if (sizestr == NULL)
415 plus = "";
416 else
417 plus = " + ";
418
419 if (ptr->length != 1)
420 s_print(ptemp, "%s%s * %d",
421 plus, dl->decl.array_max,
422 ptr->length);
423 else
424 s_print(ptemp, "%s%s", plus,
425 dl->decl.array_max);
426
427 /* now concatenate to sizestr !!!! */
428 if (sizestr == NULL) {
429 sizestr = xstrdup(ptemp);
430 }
431 else{
432 sizestr = xrealloc(sizestr,
433 strlen(sizestr)
434 +strlen(ptemp)+1);
435 sizestr = strcat(sizestr, ptemp);
436 /* build up length of array */
437 }
438 }
439 } else {
440 if (i > 0) {
441 if (sizestr == NULL && size < inline_size){
442 /*
443 * don't expand into inline code
444 * if size < inline_size
445 */
446 while (cur != dl){
447 print_stat(indent + 1, &cur->decl);
448 cur = cur->next;
449 }
450 } else {
451 /* were already looking at a xdr_inlineable structure */
452 tabify(fout, indent + 1);
453 if (sizestr == NULL)
454 f_print(fout, "buf = XDR_INLINE(xdrs, %d * BYTES_PER_XDR_UNIT);",
455 size);
456 else {
457 if (size == 0)
458 f_print(fout,
459 "buf = XDR_INLINE(xdrs, (%s) * BYTES_PER_XDR_UNIT);",
460 sizestr);
461 else
462 f_print(fout,
463 "buf = XDR_INLINE(xdrs, (%d + (%s)) * BYTES_PER_XDR_UNIT);",
464 size, sizestr);
465
466 }
467 f_print(fout, "\n");
468 tabify(fout, indent + 1);
469 f_print(fout,
470 "if (buf == NULL) {\n");
471
472 psav = cur;
473 while (cur != dl){
474 print_stat(indent + 2, &cur->decl);
475 cur = cur->next;
476 }
477
478 f_print(fout, "\n\t\t} else {\n");
479
480 cur = psav;
481 while (cur != dl){
482 emit_inline(indent + 2, &cur->decl, flag);
483 cur = cur->next;
484 }
485
486 tabify(fout, indent + 1);
487 f_print(fout, "}\n");
488 }
489 }
490 size = 0;
491 i = 0;
492 free(sizestr);
493 sizestr = NULL;
494 print_stat(indent + 1, &dl->decl);
495 }
496 }
497
498 if (i > 0) {
499 if (sizestr == NULL && size < inline_size){
500 /* don't expand into inline code if size < inline_size */
501 while (cur != dl){
502 print_stat(indent + 1, &cur->decl);
503 cur = cur->next;
504 }
505 } else {
506 /* were already looking at a xdr_inlineable structure */
507 if (sizestr == NULL)
508 f_print(fout, "\t\tbuf = XDR_INLINE(xdrs, %d * BYTES_PER_XDR_UNIT);",
509 size);
510 else
511 if (size == 0)
512 f_print(fout,
513 "\t\tbuf = XDR_INLINE(xdrs, (%s) * BYTES_PER_XDR_UNIT);",
514 sizestr);
515 else
516 f_print(fout,
517 "\t\tbuf = XDR_INLINE(xdrs, (%d + (%s)) * BYTES_PER_XDR_UNIT);",
518 size, sizestr);
519
520 f_print(fout, "\n\t\tif (buf == NULL) {\n");
521 psav = cur;
522 while (cur != NULL){
523 print_stat(indent + 2, &cur->decl);
524 cur = cur->next;
525 }
526 f_print(fout, "\t\t} else {\n");
527
528 cur = psav;
529 while (cur != dl){
530 emit_inline(indent + 2, &cur->decl, flag);
531 cur = cur->next;
532 }
533 f_print(fout, "\t\t}\n");
534 }
535 }
536 }
537
538 static void
emit_struct(definition * def)539 emit_struct(definition *def)
540 {
541 decl_list *dl;
542 int j, size, flag;
543 bas_type *ptr;
544 int can_inline;
545
546 if (inline_size == 0) {
547 /* No xdr_inlining at all */
548 for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
549 print_stat(1, &dl->decl);
550 return;
551 }
552
553 for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
554 if (dl->decl.rel == REL_VECTOR &&
555 strcmp(dl->decl.type, "opaque") != 0){
556 f_print(fout, "\tint i;\n");
557 break;
558 }
559
560 size = 0;
561 can_inline = 0;
562 /*
563 * Make a first pass and see if inling is possible.
564 */
565 for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
566 if ((dl->decl.prefix == NULL) &&
567 ((ptr = find_type(dl->decl.type)) != NULL) &&
568 ((dl->decl.rel == REL_ALIAS)||
569 (dl->decl.rel == REL_VECTOR))){
570 if (dl->decl.rel == REL_ALIAS)
571 size += ptr->length;
572 else {
573 can_inline = 1;
574 break; /* can be inlined */
575 }
576 } else {
577 if (size >= inline_size){
578 can_inline = 1;
579 break; /* can be inlined */
580 }
581 size = 0;
582 }
583 if (size >= inline_size)
584 can_inline = 1;
585
586 if (can_inline == 0){ /* can not inline, drop back to old mode */
587 for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
588 print_stat(1, &dl->decl);
589 return;
590 }
591
592 flag = PUT;
593 for (j = 0; j < 2; j++){
594 inline_struct(def, flag);
595 if (flag == PUT)
596 flag = GET;
597 }
598
599 f_print(fout, "\t\treturn (TRUE);\n\t}\n\n");
600
601 /* now take care of XDR_FREE case */
602
603 for (dl = def->def.st.decls; dl != NULL; dl = dl->next)
604 print_stat(1, &dl->decl);
605
606 }
607
608 static void
emit_typedef(definition * def)609 emit_typedef(definition *def)
610 {
611 const char *prefix = def->def.ty.old_prefix;
612 const char *type = def->def.ty.old_type;
613 const char *amax = def->def.ty.array_max;
614 relation rel = def->def.ty.rel;
615
616 print_ifstat(1, prefix, type, rel, amax, "objp", def->def_name);
617 }
618
619 static void
print_stat(int indent,declaration * dec)620 print_stat(int indent, declaration *dec)
621 {
622 const char *prefix = dec->prefix;
623 const char *type = dec->type;
624 const char *amax = dec->array_max;
625 relation rel = dec->rel;
626 char name[256];
627
628 if (isvectordef(type, rel)) {
629 s_print(name, "objp->%s", dec->name);
630 } else {
631 s_print(name, "&objp->%s", dec->name);
632 }
633 print_ifstat(indent, prefix, type, rel, amax, name, dec->name);
634 }
635
636
637 char *upcase(const char *);
638
639 static void
emit_inline(int indent,declaration * decl,int flag)640 emit_inline(int indent, declaration *decl, int flag)
641 {
642 switch (decl->rel) {
643 case REL_ALIAS :
644 emit_single_in_line(indent, decl, flag, REL_ALIAS);
645 break;
646 case REL_VECTOR :
647 tabify(fout, indent);
648 f_print(fout, "{\n");
649 tabify(fout, indent + 1);
650 f_print(fout, "%s *genp;\n\n", decl->type);
651 tabify(fout, indent + 1);
652 f_print(fout,
653 "for (i = 0, genp = objp->%s;\n", decl->name);
654 tabify(fout, indent + 2);
655 f_print(fout, "i < %s; i++) {\n", decl->array_max);
656 emit_single_in_line(indent + 2, decl, flag, REL_VECTOR);
657 tabify(fout, indent + 1);
658 f_print(fout, "}\n");
659 tabify(fout, indent);
660 f_print(fout, "}\n");
661 break;
662 default:
663 break;
664 }
665 }
666
667 static void
emit_single_in_line(int indent,declaration * decl,int flag,relation rel)668 emit_single_in_line(int indent, declaration *decl, int flag, relation rel)
669 {
670 char *upp_case;
671
672 tabify(fout, indent);
673 if (flag == PUT)
674 f_print(fout, "IXDR_PUT_");
675 else
676 if (rel == REL_ALIAS)
677 f_print(fout, "objp->%s = IXDR_GET_", decl->name);
678 else
679 f_print(fout, "*genp++ = IXDR_GET_");
680
681 upp_case = upcase(decl->type);
682
683 /* hack - XX */
684 if (strcmp(upp_case, "INT") == 0)
685 {
686 free(upp_case);
687 upp_case = strdup("LONG");
688 }
689
690 if (strcmp(upp_case, "U_INT") == 0)
691 {
692 free(upp_case);
693 upp_case = strdup("U_LONG");
694 }
695 if (flag == PUT)
696 if (rel == REL_ALIAS)
697 f_print(fout,
698 "%s(buf, objp->%s);\n", upp_case, decl->name);
699 else
700 f_print(fout, "%s(buf, *genp++);\n", upp_case);
701
702 else
703 f_print(fout, "%s(buf);\n", upp_case);
704 free(upp_case);
705 }
706
707 char *
upcase(const char * str)708 upcase(const char *str)
709 {
710 char *ptr, *hptr;
711
712 ptr = (char *)xmalloc(strlen(str)+1);
713
714 hptr = ptr;
715 while (*str != '\0')
716 *ptr++ = toupper(*str++);
717
718 *ptr = '\0';
719 return (hptr);
720 }
721