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/*****
* refaccess.cc
* Andy Hammerlindl 2005/11/28
*
* An access which refers to a variable or other object in C++.
*****/
#include "refaccess.h"
namespace trans {
using vm::item;
using vm::stack;
using vm::pop;
/* itemRefAccess */
void itemPointerRead(stack *s) {
item *p=pop<item *>(s);
s->push(*p);
}
void itemPointerWrite(stack *s) {
item *p=pop<item *>(s);
item value=pop(s);
*p=value;
s->push(value);
}
void itemRefAccess::encode(action act, position, coder &e)
{
e.encode(inst::constpush, (item)ref);
switch (act) {
case READ:
e.encode(inst::builtin, itemPointerRead);
break;
case WRITE:
e.encode(inst::builtin, itemPointerWrite);
break;
case CALL:
e.encode(inst::builtin, itemPointerRead);
e.encode(inst::popcall);
break;
};
}
void itemRefAccess::encode(action act, position pos, coder &e, frame *)
{
// Get rid of the useless top frame.
e.encode(inst::pop);
encode(act, pos, e);
}
}
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