** Main operation for equality of Lua values; return 't1 == t2'. ** L == NULL means raw equality (no metamethods) */
| 567 | ** L == NULL means raw equality (no metamethods) |
| 568 | */ |
| 569 | int luaV_equalobj (lua_State *L, const TValue *t1, const TValue *t2) { |
| 570 | const TValue *tm; |
| 571 | if (ttypetag(t1) != ttypetag(t2)) { /* not the same variant? */ |
| 572 | if (ttype(t1) != ttype(t2) || ttype(t1) != LUA_TNUMBER) |
| 573 | return 0; /* only numbers can be equal with different variants */ |
| 574 | else { /* two numbers with different variants */ |
| 575 | /* One of them is an integer. If the other does not have an |
| 576 | integer value, they cannot be equal; otherwise, compare their |
| 577 | integer values. */ |
| 578 | lua_Integer i1, i2; |
| 579 | return (luaV_tointegerns(t1, &i1, F2Ieq) && |
| 580 | luaV_tointegerns(t2, &i2, F2Ieq) && |
| 581 | i1 == i2); |
| 582 | } |
| 583 | } |
| 584 | /* values have same type and same variant */ |
| 585 | switch (ttypetag(t1)) { |
| 586 | case LUA_VNIL: case LUA_VFALSE: case LUA_VTRUE: return 1; |
| 587 | case LUA_VNUMINT: return (ivalue(t1) == ivalue(t2)); |
| 588 | case LUA_VNUMFLT: return luai_numeq(fltvalue(t1), fltvalue(t2)); |
| 589 | case LUA_VLIGHTUSERDATA: return pvalue(t1) == pvalue(t2); |
| 590 | case LUA_VLCF: return fvalue(t1) == fvalue(t2); |
| 591 | case LUA_VSHRSTR: return eqshrstr(tsvalue(t1), tsvalue(t2)); |
| 592 | case LUA_VLNGSTR: return luaS_eqlngstr(tsvalue(t1), tsvalue(t2)); |
| 593 | case LUA_VUSERDATA: { |
| 594 | if (uvalue(t1) == uvalue(t2)) return 1; |
| 595 | else if (L == NULL) return 0; |
| 596 | tm = fasttm(L, uvalue(t1)->metatable, TM_EQ); |
| 597 | if (tm == NULL) |
| 598 | tm = fasttm(L, uvalue(t2)->metatable, TM_EQ); |
| 599 | break; /* will try TM */ |
| 600 | } |
| 601 | case LUA_VTABLE: { |
| 602 | if (hvalue(t1) == hvalue(t2)) return 1; |
| 603 | else if (L == NULL) return 0; |
| 604 | tm = fasttm(L, hvalue(t1)->metatable, TM_EQ); |
| 605 | if (tm == NULL) |
| 606 | tm = fasttm(L, hvalue(t2)->metatable, TM_EQ); |
| 607 | break; /* will try TM */ |
| 608 | } |
| 609 | default: |
| 610 | return gcvalue(t1) == gcvalue(t2); |
| 611 | } |
| 612 | if (tm == NULL) /* no TM? */ |
| 613 | return 0; /* objects are different */ |
| 614 | else { |
| 615 | luaT_callTMres(L, tm, t1, t2, L->top.p); /* call TM */ |
| 616 | return !l_isfalse(s2v(L->top.p)); |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | |
| 621 | /* macro used by 'luaV_concat' to ensure that element at 'o' is a string */ |
no test coverage detected