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interface equality (strings specifically)

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R=r
OCL=17134
CL=17134
This commit is contained in:
Ken Thompson 2008-10-14 16:10:44 -07:00
parent edb1412c50
commit e2e8aa0ee1
2 changed files with 11 additions and 12 deletions
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2
src/cmd/gc/walk.c
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@ -2572,9 +2572,7 @@ ifaceop(Type *tl, Node *n, int op)
if(op == ONE)
r = nod(ONOT, r, N);
dump("bef", r);
walktype(r, Erv);
dump("aft", r);
return r;
}

21
src/runtime/iface.c
View File

@ -13,8 +13,8 @@ typedef struct Map Map;
struct Sigt
{
byte* name;
uint32 hash;
uint32 offset; // offset of substruct
uint32 hash; // hash of type // first is alg
uint32 offset; // offset of substruct // first is width
void (*fun)(void);
};
@ -265,6 +265,8 @@ sys·ifaceI2I(Sigi *si, Map *im, void *it, Map *retim, void *retit)
void
sys·ifaceeq(Map *im1, void *it1, Map *im2, void *it2, byte ret)
{
int32 alg, wid;
if(debug) {
prints("Ieq i1=");
printiface(im1, it1);
@ -284,18 +286,17 @@ sys·ifaceeq(Map *im1, void *it1, Map *im2, void *it2, byte ret)
if(im2 == nil)
goto no;
// values
if(it1 != it2)
// value
alg = im1->sigt->hash;
if(alg != im2->sigt->hash)
goto no;
// types
if(im1 == im2)
goto yes;
if(im1->sigt == im2->sigt)
goto yes;
if(im1->sigt->hash != im2->sigt->hash)
wid = im1->sigt->offset;
if(wid != im2->sigt->offset)
goto no;
if(!algarray[alg].equal(wid, &it1, &it2))
goto no;
yes:
ret = true;