static int call_orderTM (lua_State *L, const TValue *p1, const TValue *p2,
TMS event)
{
const TValue *tm1 = luaT_gettmbyobj(L, p1, event);
const TValue *tm2;
if (ttisnil(tm1)) return -1; /* no metamethod? */
tm2 = luaT_gettmbyobj(L, p2, event);
if (!luaO_rawequalObj(tm1, tm2)) /* different metamethods? */
return -1;
callTMres(L, L->top, tm1, p1, p2);
return !l_isfalse(L->top);
}
static const TValue *get_compTM (lua_State *L, Table *mt1, Table *mt2,
TMS event) {
const TValue *tm1 = fasttm(L, mt1, event);
const TValue *tm2;
if (tm1 == NULL) return NULL; /* no metamethod */
if (mt1 == mt2) return tm1; /* same metatables => same metamethods */
tm2 = fasttm(L, mt2, event);
if (tm2 == NULL) return NULL; /* no metamethod */
if (luaO_rawequalObj(tm1, tm2)) /* same metamethods? */
return tm1;
return NULL;
}
static int addk (FuncState *fs, TValue *k, TValue *v) {
lua_State *L = fs->L;
TValue *idx = luaH_set(L, fs->h, k);
Proto *f = fs->f;
int oldsize = f->sizek;
if (ttisnumber(idx)) {
lua_assert(luaO_rawequalObj(&fs->f->k[cast_int(nvalue(idx))], v));
return cast_int(nvalue(idx));
} else { /* constant not found; create a new entry */
setnvalue(idx, cast_num(fs->nk));
luaM_growvector(L, f->k, fs->nk, f->sizek, TValue,
MAXARG_Bx, "constant table overflow");
while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
setobj(L, &f->k[fs->nk], v);
luaC_barrier(L, f, v);
return fs->nk++;
}
}
/*
** returns the index of a `key' for table traversals. First goes all
** elements in the array part, then elements in the hash part. The
** beginning of a traversal is signalled by -1.
*/
static int findindex (lua_State *L, Table *t, StkId key) {
int i;
if (ttisnil(key)) return -1; /* first iteration */
i = arrayindex(key, t->sizearray);
if (i>0) /* inside array part? */
return i-1; /* yes; that's the index (corrected to C) */
else {
Node *n = mainposition(t, key);
do { /* check whether `key' is somewhere in the chain */
/* key may be dead already, but it is ok to use it in `next' */
if (luaO_rawequalObj(key2tval(n), key) ||
(ttype(gkey(n)) == LUA_TDEADKEY && iscollectable(key) &&
gcvalue(gkey(n)) == gcvalue(key))) {
i = cast_int(n - gnode(t, 0)); /* key index in hash table */
/* hash elements are numbered after array ones */
return i + t->sizearray;
}
else n = gnext(n);
} while (n);
luaG_runerror(L, "invalid key to " LUA_QL("next")); /* key not found */
return 0; /* to avoid warnings */
}
}
static int addk (FuncState *fs, TValue *k, TValue *v) {
lua_State *L = fs->L;
TValue *idx = luaH_set(L, fs->h, k);
Proto *f = fs->f;
int oldsize = f->sizek;
if (ttype(idx)==LUA_TNUMBER) {
luai_normalize(idx);
lua_assert( ttype(idx)==LUA_TINT ); /* had no fraction */
}
if (ttisint(idx)) {
lua_assert(luaO_rawequalObj(&fs->f->k[ivalue(idx)], v));
return cast_int(ivalue(idx));
}
else { /* constant not found; create a new entry */
setivalue(idx, fs->nk);
luaM_growvector(L, f->k, fs->nk, f->sizek, TValue,
MAXARG_Bx, "constant table overflow");
while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
setobj(L, &f->k[fs->nk], v);
luaC_barrier(L, f, v);
return fs->nk++;
}
}
static int addk (FuncState *fs, TValue *key, TValue *v) {
lua_State *L = fs->L;
TValue *idx = luaH_set(L, fs->h, key);
Proto *f = fs->f;
int k, oldsize;
if (ttisnumber(idx)) {
lua_Number n = nvalue(idx);
lua_number2int(k, n);
if (luaO_rawequalObj(&f->k[k], v))
return k;
/* else may be a collision (e.g., between 0.0 and "\0\0\0\0\0\0\0\0");
go through and create a new entry for this value */
}
/* constant not found; create a new entry */
oldsize = f->sizek;
k = fs->nk;
setnvalue(idx, cast_num(k));
luaM_growvector(L, f->k, k, f->sizek, TValue, MAXARG_Ax, "constants");
while (oldsize < f->sizek) setnilvalue(&f->k[oldsize++]);
setobj(L, &f->k[k], v);
fs->nk++;
luaC_barrier(L, f, v);
return k;
}
LUA_API int lua_rawequal (lua_State *L, int index1, int index2) {
StkId o1 = luaA_indexAcceptable(L, index1);
StkId o2 = luaA_indexAcceptable(L, index2);
return (o1 == NULL || o2 == NULL) ? 0 /* index out of range */
: luaO_rawequalObj(o1, o2);
}
