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_NSPlaceholderValueOrNumber.mm
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_NSPlaceholderValueOrNumber.mm
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__int64 __usercall _NSPlaceholderValueOrNumber@<rax>(__int64 a1@<rax>, char a2@<dil>)
{
__int64 result; // rax
void *v3; // rax
__int64 v4; // rcx
void *v5; // rax
__int64 v6; // rax
__int64 v7; // [rsp-8h] [rbp-10h]
// cpv,我猜是 const pointer value
v7 = a1;
result = _NSPlaceholderValueOrNumber_cpv;
if ( !_NSPlaceholderValueOrNumber_cpv )
{
v3 = _objc_msgSend(&OBJC_CLASS___NSPlaceholderValue, "self", v7);
result = NSAllocateObject(v3, 0LL, 0LL);
// _NSPlaceholderValueOrNumber_cpv 应该是个全局变量
// 也就是说 NSPlaceholderValue 实例只会有一个
_NSPlaceholderValueOrNumber_cpv = result;
}
//相应地 cpn 应该是 const pointer number..
v4 = _NSPlaceholderValueOrNumber_cpn;
if ( !_NSPlaceholderValueOrNumber_cpn )
{
v5 = _objc_msgSend(&OBJC_CLASS___NSPlaceholderNumber, "self", v7);
v6 = NSAllocateObject(v5, 0LL, 0LL);
v4 = v6;
// 同理 NSPlaceholderNumber 实例只会有一个
_NSPlaceholderValueOrNumber_cpn = v6;
result = _NSPlaceholderValueOrNumber_cpv;
}
if ( a2 ) // a2 为 true 则使用 cpn,即返回 NSPlaceholderNumber 实例
{
result = v4;
}
// btw,这几兄弟的继承关系是这样的:NSPlaceholderNumber -> NSPlaceholderValue -> NSNumber -> NSValue
return result;
}