Mercurial > projects > ldc
view dmd/struct.c @ 1112:829ac3f30103
Updating revisions.pl.in:
- Change the way the LLVM SVN revision is detected, using `svn info` instead
of `svnversion`. This speeds it up significantly on my machine (especially
when the LLVM SVN checkout isn't in disk cache).
- Add "last changed date" to SVN checkouts too, not just unpacked tarballs
- No longer rely on SVN revision to detect release vs trunk checkouts, treat
release checkout the same as unpacked release tarball. (Except for date
determination, which uses SVN date instead of filesystem date)
author | Frits van Bommel <fvbommel wxs.nl> |
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date | Fri, 13 Mar 2009 16:18:01 +0100 |
parents | b30fe7e1dbb9 |
children | 1860414bf3b7 |
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// Compiler implementation of the D programming language // Copyright (c) 1999-2009 by Digital Mars // All Rights Reserved // written by Walter Bright // http://www.digitalmars.com // License for redistribution is by either the Artistic License // in artistic.txt, or the GNU General Public License in gnu.txt. // See the included readme.txt for details. #include <stdio.h> #include <assert.h> #include "root.h" #include "aggregate.h" #include "scope.h" #include "mtype.h" #include "declaration.h" #include "module.h" #include "id.h" #include "statement.h" /********************************* AggregateDeclaration ****************************/ AggregateDeclaration::AggregateDeclaration(Loc loc, Identifier *id) : ScopeDsymbol(id) { this->loc = loc; storage_class = 0; protection = PROTpublic; type = NULL; handle = NULL; structsize = 0; // size of struct alignsize = 0; // size of struct for alignment purposes structalign = 0; // struct member alignment in effect hasUnions = 0; sizeok = 0; // size not determined yet isdeprecated = 0; inv = NULL; aggNew = NULL; aggDelete = NULL; stag = NULL; sinit = NULL; scope = NULL; #if V2 dtor = NULL; ctor = NULL; defaultCtor = NULL; #endif } enum PROT AggregateDeclaration::prot() { return protection; } void AggregateDeclaration::semantic2(Scope *sc) { //printf("AggregateDeclaration::semantic2(%s)\n", toChars()); if (scope) { error("has forward references"); return; } if (members) { sc = sc->push(this); for (size_t i = 0; i < members->dim; i++) { Dsymbol *s = (Dsymbol *)members->data[i]; s->semantic2(sc); } sc->pop(); } } void AggregateDeclaration::semantic3(Scope *sc) { int i; //printf("AggregateDeclaration::semantic3(%s)\n", toChars()); if (members) { sc = sc->push(this); for (i = 0; i < members->dim; i++) { Dsymbol *s = (Dsymbol *)members->data[i]; s->semantic3(sc); } sc->pop(); } } void AggregateDeclaration::inlineScan() { int i; //printf("AggregateDeclaration::inlineScan(%s)\n", toChars()); if (members) { for (i = 0; i < members->dim; i++) { Dsymbol *s = (Dsymbol *)members->data[i]; //printf("inline scan aggregate symbol '%s'\n", s->toChars()); s->inlineScan(); } } } unsigned AggregateDeclaration::size(Loc loc) { //printf("AggregateDeclaration::size() = %d\n", structsize); if (!members) error(loc, "unknown size"); if (sizeok != 1) { error(loc, "no size yet for forward reference"); //*(char*)0=0; } return structsize; } Type *AggregateDeclaration::getType() { return type; } int AggregateDeclaration::isDeprecated() { return isdeprecated; } /**************************** * Do byte or word alignment as necessary. * Align sizes of 0, as we may not know array sizes yet. */ void AggregateDeclaration::alignmember( unsigned salign, // struct alignment that is in effect unsigned size, // alignment requirement of field unsigned *poffset) { //printf("salign = %d, size = %d, offset = %d\n",salign,size,offset); if (salign > 1) { assert(size != 3); int sa = size; if (sa == 0 || salign < sa) sa = salign; *poffset = (*poffset + sa - 1) & ~(sa - 1); } //printf("result = %d\n",offset); } void AggregateDeclaration::addField(Scope *sc, VarDeclaration *v) { unsigned memsize; // size of member unsigned memalignsize; // size of member for alignment purposes unsigned xalign; // alignment boundaries //printf("AggregateDeclaration::addField('%s') %s\n", v->toChars(), toChars()); // Check for forward referenced types which will fail the size() call Type *t = v->type->toBasetype(); if (t->ty == Tstruct /*&& isStructDeclaration()*/) { TypeStruct *ts = (TypeStruct *)t; #if V2 if (ts->sym == this) { error("cannot have field %s with same struct type", v->toChars()); } #endif if (ts->sym->sizeok != 1) { sizeok = 2; // cannot finish; flag as forward referenced return; } } if (t->ty == Tident) { sizeok = 2; // cannot finish; flag as forward referenced return; } memsize = v->type->size(loc); memalignsize = v->type->alignsize(); xalign = v->type->memalign(sc->structalign); alignmember(xalign, memalignsize, &sc->offset); v->offset = sc->offset; sc->offset += memsize; if (sc->offset > structsize) structsize = sc->offset; if (sc->structalign < memalignsize) memalignsize = sc->structalign; if (alignsize < memalignsize) alignsize = memalignsize; //printf("\talignsize = %d\n", alignsize); v->storage_class |= STCfield; //printf(" addField '%s' to '%s' at offset %d, size = %d\n", v->toChars(), toChars(), v->offset, memsize); fields.push(v); } /********************************* StructDeclaration ****************************/ StructDeclaration::StructDeclaration(Loc loc, Identifier *id) : AggregateDeclaration(loc, id) { zeroInit = 0; // assume false until we do semantic processing #if V2 hasIdentityAssign = 0; cpctor = NULL; postblit = NULL; #endif // For forward references type = new TypeStruct(this); } Dsymbol *StructDeclaration::syntaxCopy(Dsymbol *s) { StructDeclaration *sd; if (s) sd = (StructDeclaration *)s; else sd = new StructDeclaration(loc, ident); ScopeDsymbol::syntaxCopy(sd); return sd; } void StructDeclaration::semantic(Scope *sc) { int i; Scope *sc2; //printf("+StructDeclaration::semantic(this=%p, '%s')\n", this, toChars()); //static int count; if (++count == 20) *(char*)0=0; assert(type); if (!members) // if forward reference return; if (symtab) { if (!scope) return; // semantic() already completed } else symtab = new DsymbolTable(); Scope *scx = NULL; if (scope) { sc = scope; scx = scope; // save so we don't make redundant copies scope = NULL; } parent = sc->parent; #if STRUCTTHISREF handle = type; #else handle = type->pointerTo(); #endif structalign = sc->structalign; protection = sc->protection; if (sc->stc & STCdeprecated) isdeprecated = 1; assert(!isAnonymous()); if (sc->stc & STCabstract) error("structs, unions cannot be abstract"); #if V2 if (storage_class & STCinvariant) type = type->invariantOf(); else if (storage_class & STCconst) type = type->constOf(); #endif if (sizeok == 0) // if not already done the addMember step { for (i = 0; i < members->dim; i++) { Dsymbol *s = (Dsymbol *)members->data[i]; //printf("adding member '%s' to '%s'\n", s->toChars(), this->toChars()); s->addMember(sc, this, 1); } } sizeok = 0; sc2 = sc->push(this); sc2->stc = 0; sc2->parent = this; if (isUnionDeclaration()) sc2->inunion = 1; sc2->protection = PROTpublic; sc2->explicitProtection = 0; int members_dim = members->dim; for (i = 0; i < members_dim; i++) { Dsymbol *s = (Dsymbol *)members->data[i]; s->semantic(sc2); if (isUnionDeclaration()) sc2->offset = 0; #if 0 if (sizeok == 2) { //printf("forward reference\n"); break; } #endif } /* The TypeInfo_Struct is expecting an opEquals and opCmp with * a parameter that is a pointer to the struct. But if there * isn't one, but is an opEquals or opCmp with a value, write * another that is a shell around the value: * int opCmp(struct *p) { return opCmp(*p); } */ TypeFunction *tfeqptr; { Arguments *arguments = new Arguments; Argument *arg = new Argument(STCin, handle, Id::p, NULL); arguments->push(arg); tfeqptr = new TypeFunction(arguments, Type::tint32, 0, LINKd); tfeqptr = (TypeFunction *)tfeqptr->semantic(0, sc); } TypeFunction *tfeq; { Arguments *arguments = new Arguments; Argument *arg = new Argument(STCin, type, NULL, NULL); arguments->push(arg); tfeq = new TypeFunction(arguments, Type::tint32, 0, LINKd); tfeq = (TypeFunction *)tfeq->semantic(0, sc); } Identifier *id = Id::eq; for (int i = 0; i < 2; i++) { Dsymbol *s = search_function(this, id); FuncDeclaration *fdx = s ? s->isFuncDeclaration() : NULL; if (fdx) { FuncDeclaration *fd = fdx->overloadExactMatch(tfeqptr); if (!fd) { fd = fdx->overloadExactMatch(tfeq); if (fd) { // Create the thunk, fdptr FuncDeclaration *fdptr = new FuncDeclaration(loc, loc, fdx->ident, STCundefined, tfeqptr); Expression *e = new IdentifierExp(loc, Id::p); e = new PtrExp(loc, e); Expressions *args = new Expressions(); args->push(e); e = new IdentifierExp(loc, id); e = new CallExp(loc, e, args); fdptr->fbody = new ReturnStatement(loc, e); ScopeDsymbol *s = fdx->parent->isScopeDsymbol(); assert(s); s->members->push(fdptr); fdptr->addMember(sc, s, 1); fdptr->semantic(sc2); } } } id = Id::cmp; } #if V2 dtor = buildDtor(sc2); postblit = buildPostBlit(sc2); cpctor = buildCpCtor(sc2); buildOpAssign(sc2); #endif sc2->pop(); if (sizeok == 2) { // semantic() failed because of forward references. // Unwind what we did, and defer it for later fields.setDim(0); structsize = 0; alignsize = 0; structalign = 0; scope = scx ? scx : new Scope(*sc); scope->setNoFree(); scope->module->addDeferredSemantic(this); //printf("\tdeferring %s\n", toChars()); return; } // 0 sized struct's are set to 1 byte if (structsize == 0) { structsize = 1; alignsize = 1; } // Round struct size up to next alignsize boundary. // This will ensure that arrays of structs will get their internals // aligned properly. structsize = (structsize + alignsize - 1) & ~(alignsize - 1); sizeok = 1; Module::dprogress++; //printf("-StructDeclaration::semantic(this=%p, '%s')\n", this, toChars()); // Determine if struct is all zeros or not zeroInit = 1; for (i = 0; i < fields.dim; i++) { Dsymbol *s = (Dsymbol *)fields.data[i]; VarDeclaration *vd = s->isVarDeclaration(); if (vd && !vd->isDataseg()) { if (vd->init) { // Should examine init to see if it is really all 0's zeroInit = 0; break; } else { if (!vd->type->isZeroInit()) { zeroInit = 0; break; } } } } /* Look for special member functions. */ #if V2 ctor = (CtorDeclaration *)search(0, Id::ctor, 0); #endif inv = (InvariantDeclaration *)search(0, Id::classInvariant, 0); aggNew = (NewDeclaration *)search(0, Id::classNew, 0); aggDelete = (DeleteDeclaration *)search(0, Id::classDelete, 0); if (sc->func) { semantic2(sc); semantic3(sc); } } void StructDeclaration::toCBuffer(OutBuffer *buf, HdrGenState *hgs) { int i; buf->printf("%s ", kind()); if (!isAnonymous()) buf->writestring(toChars()); if (!members) { buf->writeByte(';'); buf->writenl(); return; } buf->writenl(); buf->writeByte('{'); buf->writenl(); for (i = 0; i < members->dim; i++) { Dsymbol *s = (Dsymbol *)members->data[i]; buf->writestring(" "); s->toCBuffer(buf, hgs); } buf->writeByte('}'); buf->writenl(); } const char *StructDeclaration::kind() { return "struct"; } /********************************* UnionDeclaration ****************************/ UnionDeclaration::UnionDeclaration(Loc loc, Identifier *id) : StructDeclaration(loc, id) { } Dsymbol *UnionDeclaration::syntaxCopy(Dsymbol *s) { UnionDeclaration *ud; if (s) ud = (UnionDeclaration *)s; else ud = new UnionDeclaration(loc, ident); StructDeclaration::syntaxCopy(ud); return ud; } const char *UnionDeclaration::kind() { return "union"; }