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