1 #include "c.h"
2 #include <float.h>
3
4
5 static Field isfield(const char *, Field);
6 static Type type(int, Type, int, int, void *);
7
8 static struct entry {
9 struct type type;
10 struct entry *link;
11 } *typetable[128];
12 static int maxlevel;
13
14 static Symbol pointersym;
15
16 Type chartype; /* char */
17 Type doubletype; /* double */
18 Type floattype; /* float */
19 Type inttype; /* signed int */
20 Type longdouble; /* long double */
21 Type longtype; /* long */
22 Type longlong; /* long long */
23 Type shorttype; /* signed short int */
24 Type signedchar; /* signed char */
25 Type unsignedchar; /* unsigned char */
26 Type unsignedlong; /* unsigned long int */
27 Type unsignedlonglong; /* unsigned long long int */
28 Type unsignedshort; /* unsigned short int */
29 Type unsignedtype; /* unsigned int */
30 Type funcptype; /* void (*)() */
31 Type charptype; /* char* */
32 Type voidptype; /* void* */
33 Type voidtype; /* basic types: void */
34 Type unsignedptr; /* unsigned type to hold void* */
35 Type signedptr; /* signed type to hold void* */
36 Type widechar; /* unsigned type that represents wchar_t */
37
xxinit(int op,char * name,Metrics m)38 static Type xxinit(int op, char *name, Metrics m) {
39 Symbol p = install(string(name), &types, GLOBAL, PERM);
40 Type ty = type(op, 0, m.size, m.align, p);
41
42 assert(ty->align == 0 || ty->size%ty->align == 0);
43 p->type = ty;
44 p->addressed = m.outofline;
45 switch (ty->op) {
46 case INT:
47 p->u.limits.max.i = ones(8*ty->size)>>1;
48 p->u.limits.min.i = -p->u.limits.max.i - 1;
49 break;
50 case UNSIGNED:
51 p->u.limits.max.u = ones(8*ty->size);
52 p->u.limits.min.u = 0;
53 break;
54 case FLOAT:
55 if (ty->size == sizeof (float))
56 p->u.limits.max.d = FLT_MAX;
57 else if (ty->size == sizeof (double))
58 p->u.limits.max.d = DBL_MAX;
59 else
60 p->u.limits.max.d = LDBL_MAX;
61 p->u.limits.min.d = -p->u.limits.max.d;
62 break;
63 default: assert(0);
64 }
65 return ty;
66 }
type(int op,Type ty,int size,int align,void * sym)67 static Type type(int op, Type ty, int size, int align, void *sym) {
68 unsigned h = (op^((unsigned long)ty>>3))
69 &(NELEMS(typetable)-1);
70 struct entry *tn;
71
72 if (op != FUNCTION && (op != ARRAY || size > 0))
73 for (tn = typetable[h]; tn; tn = tn->link)
74 if (tn->type.op == op && tn->type.type == ty
75 && tn->type.size == size && tn->type.align == align
76 && tn->type.u.sym == sym)
77 return &tn->type;
78 NEW0(tn, PERM);
79 tn->type.op = op;
80 tn->type.type = ty;
81 tn->type.size = size;
82 tn->type.align = align;
83 tn->type.u.sym = sym;
84 tn->link = typetable[h];
85 typetable[h] = tn;
86 return &tn->type;
87 }
type_init(int argc,char * argv[])88 void type_init(int argc, char *argv[]) {
89 static int inited;
90 int i;
91
92 if (inited)
93 return;
94 inited = 1;
95 if (!IR)
96 return;
97 for (i = 1; i < argc; i++) {
98 int size, align, outofline;
99 if (strncmp(argv[i], "-unsigned_char=", 15) == 0)
100 IR->unsigned_char = argv[i][15] - '0';
101 #define xx(name) \
102 else if (sscanf(argv[i], "-" #name "=%d,%d,%d", &size, &align, &outofline) == 3) { \
103 IR->name.size = size; IR->name.align = align; \
104 IR->name.outofline = outofline; }
105 xx(charmetric)
106 xx(shortmetric)
107 xx(intmetric)
108 xx(longmetric)
109 xx(longlongmetric)
110 xx(floatmetric)
111 xx(doublemetric)
112 xx(longdoublemetric)
113 xx(ptrmetric)
114 xx(structmetric)
115 #undef xx
116 }
117 #define xx(v,name,op,metrics) v=xxinit(op,name,IR->metrics)
118 xx(chartype, "char", IR->unsigned_char ? UNSIGNED : INT,charmetric);
119 xx(doubletype, "double", FLOAT, doublemetric);
120 xx(floattype, "float", FLOAT, floatmetric);
121 xx(inttype, "int", INT, intmetric);
122 xx(longdouble, "long double", FLOAT, longdoublemetric);
123 xx(longtype, "long int", INT, longmetric);
124 xx(longlong, "long long int", INT, longlongmetric);
125 xx(shorttype, "short", INT, shortmetric);
126 xx(signedchar, "signed char", INT, charmetric);
127 xx(unsignedchar, "unsigned char", UNSIGNED,charmetric);
128 xx(unsignedlong, "unsigned long", UNSIGNED,longmetric);
129 xx(unsignedshort, "unsigned short", UNSIGNED,shortmetric);
130 xx(unsignedtype, "unsigned int", UNSIGNED,intmetric);
131 xx(unsignedlonglong,"unsigned long long",UNSIGNED,longlongmetric);
132 #undef xx
133 {
134 Symbol p;
135 p = install(string("void"), &types, GLOBAL, PERM);
136 voidtype = type(VOID, NULL, 0, 0, p);
137 p->type = voidtype;
138 }
139 pointersym = install(string("T*"), &types, GLOBAL, PERM);
140 pointersym->addressed = IR->ptrmetric.outofline;
141 pointersym->u.limits.max.p = (void*)ones(8*IR->ptrmetric.size);
142 pointersym->u.limits.min.p = 0;
143 voidptype = ptr(voidtype);
144 funcptype = ptr(func(voidtype, NULL, 1));
145 charptype = ptr(chartype);
146 #define xx(v,t) if (v==NULL && t->size==voidptype->size && t->align==voidptype->align) v=t
147 xx(unsignedptr,unsignedshort);
148 xx(unsignedptr,unsignedtype);
149 xx(unsignedptr,unsignedlong);
150 xx(unsignedptr,unsignedlonglong);
151 if (unsignedptr == NULL)
152 unsignedptr = type(UNSIGNED, NULL, voidptype->size, voidptype->align, voidptype->u.sym);
153 xx(signedptr,shorttype);
154 xx(signedptr,inttype);
155 xx(signedptr,longtype);
156 xx(signedptr,longlong);
157 if (signedptr == NULL)
158 signedptr = type(INT, NULL, voidptype->size, voidptype->align, voidptype->u.sym);
159 #undef xx
160 widechar = unsignedshort;
161 for (i = 0; i < argc; i++) {
162 #define xx(name,type) \
163 if (strcmp(argv[i], "-wchar_t=" #name) == 0) \
164 widechar = type;
165 xx(unsigned_char,unsignedchar)
166 xx(unsigned_int,unsignedtype)
167 xx(unsigned_short,unsignedshort)
168 }
169 #undef xx
170 }
rmtypes(int lev)171 void rmtypes(int lev) {
172 if (maxlevel >= lev) {
173 int i;
174 maxlevel = 0;
175 for (i = 0; i < NELEMS(typetable); i++) {
176 struct entry *tn, **tq = &typetable[i];
177 while ((tn = *tq) != NULL)
178 if (tn->type.op == FUNCTION)
179 tq = &tn->link;
180 else if (tn->type.u.sym && tn->type.u.sym->scope >= lev)
181 *tq = tn->link;
182 else {
183 if (tn->type.u.sym && tn->type.u.sym->scope > maxlevel)
184 maxlevel = tn->type.u.sym->scope;
185 tq = &tn->link;
186 }
187
188 }
189 }
190 }
ptr(Type ty)191 Type ptr(Type ty) {
192 return type(POINTER, ty, IR->ptrmetric.size,
193 IR->ptrmetric.align, pointersym);
194 }
deref(Type ty)195 Type deref(Type ty) {
196 if (isptr(ty))
197 ty = ty->type;
198 else
199 error("type error: %s\n", "pointer expected");
200 return isenum(ty) ? unqual(ty)->type : ty;
201 }
array(Type ty,int n,int a)202 Type array(Type ty, int n, int a) {
203 assert(ty);
204 if (isfunc(ty)) {
205 error("illegal type `array of %t'\n", ty);
206 return array(inttype, n, 0);
207 }
208 if (isarray(ty) && ty->size == 0)
209 error("missing array size\n");
210 if (ty->size == 0) {
211 if (unqual(ty) == voidtype)
212 error("illegal type `array of %t'\n", ty);
213 else if (Aflag >= 2)
214 warning("declaring type array of %t' is undefined\n", ty);
215
216 } else if (n > INT_MAX/ty->size) {
217 error("size of `array of %t' exceeds %d bytes\n",
218 ty, INT_MAX);
219 n = 1;
220 }
221 return type(ARRAY, ty, n*ty->size,
222 a ? a : ty->align, NULL);
223 }
atop(Type ty)224 Type atop(Type ty) {
225 if (isarray(ty))
226 return ptr(ty->type);
227 error("type error: %s\n", "array expected");
228 return ptr(ty);
229 }
qual(int op,Type ty)230 Type qual(int op, Type ty) {
231 if (isarray(ty))
232 ty = type(ARRAY, qual(op, ty->type), ty->size,
233 ty->align, NULL);
234 else if (isfunc(ty))
235 warning("qualified function type ignored\n");
236 else if ((isconst(ty) && op == CONST)
237 || (isvolatile(ty) && op == VOLATILE))
238 error("illegal type `%k %t'\n", op, ty);
239 else {
240 if (isqual(ty)) {
241 op += ty->op;
242 ty = ty->type;
243 }
244 ty = type(op, ty, ty->size, ty->align, NULL);
245 }
246 return ty;
247 }
func(Type ty,Type * proto,int style)248 Type func(Type ty, Type *proto, int style) {
249 if (ty && (isarray(ty) || isfunc(ty)))
250 error("illegal return type `%t'\n", ty);
251 ty = type(FUNCTION, ty, 0, 0, NULL);
252 ty->u.f.proto = proto;
253 ty->u.f.oldstyle = style;
254 return ty;
255 }
freturn(Type ty)256 Type freturn(Type ty) {
257 if (isfunc(ty))
258 return ty->type;
259 error("type error: %s\n", "function expected");
260 return inttype;
261 }
variadic(Type ty)262 int variadic(Type ty) {
263 if (isfunc(ty) && ty->u.f.proto) {
264 int i;
265 for (i = 0; ty->u.f.proto[i]; i++)
266 ;
267 return i > 1 && ty->u.f.proto[i-1] == voidtype;
268 }
269 return 0;
270 }
newstruct(int op,char * tag)271 Type newstruct(int op, char *tag) {
272 Symbol p;
273
274 assert(tag);
275 if (*tag == 0)
276 tag = stringd(genlabel(1));
277 else
278 if ((p = lookup(tag, types)) != NULL && (p->scope == level
279 || (p->scope == PARAM && level == PARAM+1))) {
280 if (p->type->op == op && !p->defined)
281 return p->type;
282 error("redefinition of `%s' previously defined at %w\n",
283 p->name, &p->src);
284 }
285 p = install(tag, &types, level, PERM);
286 p->type = type(op, NULL, 0, 0, p);
287 if (p->scope > maxlevel)
288 maxlevel = p->scope;
289 p->src = src;
290 return p->type;
291 }
newfield(char * name,Type ty,Type fty)292 Field newfield(char *name, Type ty, Type fty) {
293 Field p, *q = &ty->u.sym->u.s.flist;
294
295 if (name == NULL)
296 name = stringd(genlabel(1));
297 for (p = *q; p; q = &p->link, p = *q)
298 if (p->name == name)
299 error("duplicate field name `%s' in `%t'\n",
300 name, ty);
301 NEW0(p, PERM);
302 *q = p;
303 p->name = name;
304 p->type = fty;
305 if (xref) { /* omit */
306 if (ty->u.sym->u.s.ftab == NULL) /* omit */
307 ty->u.sym->u.s.ftab = table(NULL, level); /* omit */
308 install(name, &ty->u.sym->u.s.ftab, 0, PERM)->src = src;/* omit */
309 } /* omit */
310 return p;
311 }
eqtype(Type ty1,Type ty2,int ret)312 int eqtype(Type ty1, Type ty2, int ret) {
313 if (ty1 == ty2)
314 return 1;
315 if (ty1->op != ty2->op)
316 return 0;
317 switch (ty1->op) {
318 case ENUM: case UNION: case STRUCT:
319 case UNSIGNED: case INT: case FLOAT:
320 return 0;
321 case POINTER: return eqtype(ty1->type, ty2->type, 1);
322 case VOLATILE: case CONST+VOLATILE:
323 case CONST: return eqtype(ty1->type, ty2->type, 1);
324 case ARRAY: if (eqtype(ty1->type, ty2->type, 1)) {
325 if (ty1->size == ty2->size)
326 return 1;
327 if (ty1->size == 0 || ty2->size == 0)
328 return ret;
329 }
330 return 0;
331 case FUNCTION: if (eqtype(ty1->type, ty2->type, 1)) {
332 Type *p1 = ty1->u.f.proto, *p2 = ty2->u.f.proto;
333 if (p1 == p2)
334 return 1;
335 if (p1 && p2) {
336 for ( ; *p1 && *p2; p1++, p2++)
337 if (eqtype(unqual(*p1), unqual(*p2), 1) == 0)
338 return 0;
339 if (*p1 == NULL && *p2 == NULL)
340 return 1;
341 } else {
342 if (variadic(p1 ? ty1 : ty2))
343 return 0;
344 if (p1 == NULL)
345 p1 = p2;
346 for ( ; *p1; p1++) {
347 Type ty = unqual(*p1);
348 if (promote(ty) != (isenum(ty) ? ty->type : ty))
349 return 0;
350 }
351 return 1;
352 }
353 }
354 return 0;
355 }
356 assert(0); return 0;
357 }
promote(Type ty)358 Type promote(Type ty) {
359 ty = unqual(ty);
360 switch (ty->op) {
361 case ENUM:
362 return inttype;
363 case INT:
364 if (ty->size < inttype->size)
365 return inttype;
366 break;
367 case UNSIGNED:
368 if (ty->size < inttype->size)
369 return inttype;
370 if (ty->size < unsignedtype->size)
371 return unsignedtype;
372 break;
373 case FLOAT:
374 if (ty->size < doubletype->size)
375 return doubletype;
376 }
377 return ty;
378 }
signedint(Type ty)379 Type signedint(Type ty) {
380 if (ty->op == INT)
381 return ty;
382 assert(ty->op == UNSIGNED);
383 #define xx(t) if (ty->size == t->size) return t
384 xx(inttype);
385 xx(longtype);
386 xx(longlong);
387 #undef xx
388 assert(0); return NULL;
389 }
compose(Type ty1,Type ty2)390 Type compose(Type ty1, Type ty2) {
391 if (ty1 == ty2)
392 return ty1;
393 assert(ty1->op == ty2->op);
394 switch (ty1->op) {
395 case POINTER:
396 return ptr(compose(ty1->type, ty2->type));
397 case CONST+VOLATILE:
398 return qual(CONST, qual(VOLATILE,
399 compose(ty1->type, ty2->type)));
400 case CONST: case VOLATILE:
401 return qual(ty1->op, compose(ty1->type, ty2->type));
402 case ARRAY: { Type ty = compose(ty1->type, ty2->type);
403 if (ty1->size && ((ty1->type->size && ty2->size == 0) || ty1->size == ty2->size))
404 return array(ty, ty1->size/ty1->type->size, ty1->align);
405 if (ty2->size && ty2->type->size && ty1->size == 0)
406 return array(ty, ty2->size/ty2->type->size, ty2->align);
407 return array(ty, 0, 0); }
408 case FUNCTION: { Type *p1 = ty1->u.f.proto, *p2 = ty2->u.f.proto;
409 Type ty = compose(ty1->type, ty2->type);
410 List tlist = NULL;
411 if (p1 == NULL && p2 == NULL)
412 return func(ty, NULL, 1);
413 if (p1 && p2 == NULL)
414 return func(ty, p1, ty1->u.f.oldstyle);
415 if (p2 && p1 == NULL)
416 return func(ty, p2, ty2->u.f.oldstyle);
417 for ( ; *p1 && *p2; p1++, p2++) {
418 Type ty = compose(unqual(*p1), unqual(*p2));
419 if (isconst(*p1) || isconst(*p2))
420 ty = qual(CONST, ty);
421 if (isvolatile(*p1) || isvolatile(*p2))
422 ty = qual(VOLATILE, ty);
423 tlist = append(ty, tlist);
424 }
425 assert(*p1 == NULL && *p2 == NULL);
426 return func(ty, ltov(&tlist, PERM), 0); }
427 }
428 assert(0); return NULL;
429 }
ttob(Type ty)430 int ttob(Type ty) {
431 switch (ty->op) {
432 case CONST: case VOLATILE: case CONST+VOLATILE:
433 return ttob(ty->type);
434 case VOID: case INT: case UNSIGNED: case FLOAT:
435 return ty->op + sizeop(ty->size);
436 case POINTER:
437 return POINTER + sizeop(voidptype->size);
438 case FUNCTION:
439 return POINTER + sizeop(funcptype->size);
440 case ARRAY: case STRUCT: case UNION:
441 return STRUCT;
442 case ENUM:
443 return INT + sizeop(inttype->size);
444 }
445 assert(0); return INT;
446 }
btot(int op,int size)447 Type btot(int op, int size) {
448 #define xx(ty) if (size == (ty)->size) return ty;
449 switch (optype(op)) {
450 case F:
451 xx(floattype);
452 xx(doubletype);
453 xx(longdouble);
454 assert(0); return 0;
455 case I:
456 if (chartype->op == INT)
457 xx(chartype);
458 xx(signedchar);
459 xx(shorttype);
460 xx(inttype);
461 xx(longtype);
462 xx(longlong);
463 assert(0); return 0;
464 case U:
465 if (chartype->op == UNSIGNED)
466 xx(chartype);
467 xx(unsignedchar);
468 xx(unsignedshort);
469 xx(unsignedtype);
470 xx(unsignedlong);
471 xx(unsignedlonglong);
472 assert(0); return 0;
473 case P:
474 xx(voidptype);
475 xx(funcptype);
476 assert(0); return 0;
477 }
478 #undef xx
479 assert(0); return 0;
480 }
hasproto(Type ty)481 int hasproto(Type ty) {
482 if (ty == 0)
483 return 1;
484 switch (ty->op) {
485 case CONST: case VOLATILE: case CONST+VOLATILE: case POINTER:
486 case ARRAY:
487 return hasproto(ty->type);
488 case FUNCTION:
489 return hasproto(ty->type) && ty->u.f.proto;
490 case STRUCT: case UNION:
491 case VOID: case FLOAT: case ENUM: case INT: case UNSIGNED:
492 return 1;
493 }
494 assert(0); return 0;
495 }
496 /* fieldlist - construct a flat list of fields in type ty */
fieldlist(Type ty)497 Field fieldlist(Type ty) {
498 return ty->u.sym->u.s.flist;
499 }
500
501 /* fieldref - find field name of type ty, return entry */
fieldref(const char * name,Type ty)502 Field fieldref(const char *name, Type ty) {
503 Field p = isfield(name, unqual(ty)->u.sym->u.s.flist);
504
505 if (p && xref) {
506 Symbol q;
507 assert(unqual(ty)->u.sym->u.s.ftab);
508 q = lookup(name, unqual(ty)->u.sym->u.s.ftab);
509 assert(q);
510 use(q, src);
511 }
512 return p;
513 }
514
515 /* ftype - return a function type for rty function (ty,...)' */
ftype(Type rty,Type ty)516 Type ftype(Type rty, Type ty) {
517 List list = append(ty, NULL);
518
519 list = append(voidtype, list);
520 return func(rty, ltov(&list, PERM), 0);
521 }
522
523 /* isfield - if name is a field in flist, return pointer to the field structure */
isfield(const char * name,Field flist)524 static Field isfield(const char *name, Field flist) {
525 for ( ; flist; flist = flist->link)
526 if (flist->name == name)
527 break;
528 return flist;
529 }
530
531 /* outtype - output type ty */
outtype(Type ty,FILE * f)532 void outtype(Type ty, FILE *f) {
533 switch (ty->op) {
534 case CONST+VOLATILE: case CONST: case VOLATILE:
535 fprint(f, "%k %t", ty->op, ty->type);
536 break;
537 case STRUCT: case UNION: case ENUM:
538 assert(ty->u.sym);
539 if (ty->size == 0)
540 fprint(f, "incomplete ");
541 assert(ty->u.sym->name);
542 if (*ty->u.sym->name >= '1' && *ty->u.sym->name <= '9') {
543 Symbol p = findtype(ty);
544 if (p == 0)
545 fprint(f, "%k defined at %w", ty->op, &ty->u.sym->src);
546 else
547 fprint(f, p->name);
548 } else {
549 fprint(f, "%k %s", ty->op, ty->u.sym->name);
550 if (ty->size == 0)
551 fprint(f, " defined at %w", &ty->u.sym->src);
552 }
553 break;
554 case VOID: case FLOAT: case INT: case UNSIGNED:
555 fprint(f, ty->u.sym->name);
556 break;
557 case POINTER:
558 fprint(f, "pointer to %t", ty->type);
559 break;
560 case FUNCTION:
561 fprint(f, "%t function", ty->type);
562 if (ty->u.f.proto && ty->u.f.proto[0]) {
563 int i;
564 fprint(f, "(%t", ty->u.f.proto[0]);
565 for (i = 1; ty->u.f.proto[i]; i++)
566 if (ty->u.f.proto[i] == voidtype)
567 fprint(f, ",...");
568 else
569 fprint(f, ",%t", ty->u.f.proto[i]);
570 fprint(f, ")");
571 } else if (ty->u.f.proto && ty->u.f.proto[0] == 0)
572 fprint(f, "(void)");
573
574 break;
575 case ARRAY:
576 if (ty->size > 0 && ty->type && ty->type->size > 0) {
577 fprint(f, "array %d", ty->size/ty->type->size);
578 while (ty->type && isarray(ty->type) && ty->type->type->size > 0) {
579 ty = ty->type;
580 fprint(f, ",%d", ty->size/ty->type->size);
581 }
582 } else
583 fprint(f, "incomplete array");
584 if (ty->type)
585 fprint(f, " of %t", ty->type);
586 break;
587 default: assert(0);
588 }
589 }
590
591 /* printdecl - output a C declaration for symbol p of type ty */
printdecl(Symbol p,Type ty)592 void printdecl(Symbol p, Type ty) {
593 switch (p->sclass) {
594 case AUTO:
595 fprint(stderr, "%s;\n", typestring(ty, p->name));
596 break;
597 case STATIC: case EXTERN:
598 fprint(stderr, "%k %s;\n", p->sclass, typestring(ty, p->name));
599 break;
600 case TYPEDEF: case ENUM:
601 break;
602 default: assert(0);
603 }
604 }
605
606 /* printproto - output a prototype declaration for function p */
printproto(Symbol p,Symbol callee[])607 void printproto(Symbol p, Symbol callee[]) {
608 if (p->type->u.f.proto)
609 printdecl(p, p->type);
610 else {
611 int i;
612 List list = 0;
613 if (callee[0] == 0)
614 list = append(voidtype, list);
615 else
616 for (i = 0; callee[i]; i++)
617 list = append(callee[i]->type, list);
618 printdecl(p, func(freturn(p->type), ltov(&list, PERM), 0));
619 }
620 }
621
622 /* prtype - print details of type ty on f with given indent */
prtype(Type ty,FILE * f,int indent,unsigned mark)623 static void prtype(Type ty, FILE *f, int indent, unsigned mark) {
624 switch (ty->op) {
625 default:
626 fprint(f, "(%d %d %d [%p])", ty->op, ty->size, ty->align, ty->u.sym);
627 break;
628 case FLOAT: case INT: case UNSIGNED: case VOID:
629 fprint(f, "(%k %d %d [\"%s\"])", ty->op, ty->size, ty->align, ty->u.sym->name);
630 break;
631 case CONST+VOLATILE: case CONST: case VOLATILE: case POINTER: case ARRAY:
632 fprint(f, "(%k %d %d ", ty->op, ty->size, ty->align);
633 prtype(ty->type, f, indent+1, mark);
634 fprint(f, ")");
635 break;
636 case STRUCT: case UNION:
637 fprint(f, "(%k %d %d [\"%s\"]", ty->op, ty->size, ty->align, ty->u.sym->name);
638 if (ty->x.marked != mark) {
639 Field p;
640 ty->x.marked = mark;
641 for (p = ty->u.sym->u.s.flist; p; p = p->link) {
642 fprint(f, "\n%I", indent+1);
643 prtype(p->type, f, indent+1, mark);
644 fprint(f, " %s@%d", p->name, p->offset);
645 if (p->lsb)
646 fprint(f, ":%d..%d",
647 fieldsize(p) + fieldright(p), fieldright(p));
648 }
649 fprint(f, "\n%I", indent);
650 }
651 fprint(f, ")");
652 break;
653 case ENUM:
654 fprint(f, "(%k %d %d [\"%s\"]", ty->op, ty->size, ty->align, ty->u.sym->name);
655 if (ty->x.marked != mark) {
656 int i;
657 Symbol *p = ty->u.sym->u.idlist;
658 ty->x.marked = mark;
659 for (i = 0; p[i] != NULL; i++)
660 fprint(f, "%I%s=%d\n", indent+1, p[i]->name, p[i]->u.value);
661 }
662 fprint(f, ")");
663 break;
664 case FUNCTION:
665 fprint(f, "(%k %d %d ", ty->op, ty->size, ty->align);
666 prtype(ty->type, f, indent+1, mark);
667 if (ty->u.f.proto) {
668 int i;
669 fprint(f, "\n%I{", indent+1);
670 for (i = 0; ty->u.f.proto[i]; i++) {
671 if (i > 0)
672 fprint(f, "%I", indent+2);
673 prtype(ty->u.f.proto[i], f, indent+2, mark);
674 fprint(f, "\n");
675 }
676 fprint(f, "%I}", indent+1);
677 }
678 fprint(f, ")");
679 break;
680 }
681 }
682
683 /* printtype - print details of type ty on fd */
printtype(Type ty,int fd)684 void printtype(Type ty, int fd) {
685 static unsigned mark;
686 prtype(ty, fd == 1 ? stdout : stderr, 0, ++mark);
687 fprint(fd == 1 ? stdout : stderr, "\n");
688 }
689
690 /* typestring - return ty as C declaration for str, which may be "" */
typestring(Type ty,char * str)691 char *typestring(Type ty, char *str) {
692 for ( ; ty; ty = ty->type) {
693 Symbol p;
694 switch (ty->op) {
695 case CONST+VOLATILE: case CONST: case VOLATILE:
696 if (isptr(ty->type))
697 str = stringf("%k %s", ty->op, str);
698 else
699 return stringf("%k %s", ty->op, typestring(ty->type, str));
700 break;
701 case STRUCT: case UNION: case ENUM:
702 assert(ty->u.sym);
703 if ((p = findtype(ty)) != NULL)
704 return *str ? stringf("%s %s", p->name, str) : p->name;
705 if (*ty->u.sym->name >= '1' && *ty->u.sym->name <= '9')
706 warning("unnamed %k in prototype\n", ty->op);
707 if (*str)
708 return stringf("%k %s %s", ty->op, ty->u.sym->name, str);
709 else
710 return stringf("%k %s", ty->op, ty->u.sym->name);
711 case VOID: case FLOAT: case INT: case UNSIGNED:
712 return *str ? stringf("%s %s", ty->u.sym->name, str) : ty->u.sym->name;
713 case POINTER:
714 if (!ischar(ty->type) && (p = findtype(ty)) != NULL)
715 return *str ? stringf("%s %s", p->name, str) : p->name;
716 str = stringf(isarray(ty->type) || isfunc(ty->type) ? "(*%s)" : "*%s", str);
717 break;
718 case FUNCTION:
719 if ((p = findtype(ty)) != NULL)
720 return *str ? stringf("%s %s", p->name, str) : p->name;
721 if (ty->u.f.proto == 0)
722 str = stringf("%s()", str);
723 else if (ty->u.f.proto[0]) {
724 int i;
725 str = stringf("%s(%s", str, typestring(ty->u.f.proto[0], ""));
726 for (i = 1; ty->u.f.proto[i]; i++)
727 if (ty->u.f.proto[i] == voidtype)
728 str = stringf("%s, ...", str);
729 else
730 str = stringf("%s, %s", str, typestring(ty->u.f.proto[i], ""));
731 str = stringf("%s)", str);
732 } else
733 str = stringf("%s(void)", str);
734 break;
735 case ARRAY:
736 if ((p = findtype(ty)) != NULL)
737 return *str ? stringf("%s %s", p->name, str) : p->name;
738 if (ty->type && ty->type->size > 0)
739 str = stringf("%s[%d]", str, ty->size/ty->type->size);
740 else
741 str = stringf("%s[]", str);
742 break;
743 default: assert(0);
744 }
745 }
746 assert(0); return 0;
747 }
748
749