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#include "xt.h"
Generic_Predicate (Identifier)
static Identifier_Equal (x, y) Object x, y; {
register struct S_Identifier *p = IDENTIFIER(x), *q = IDENTIFIER(y);
return p->type == q->type && p->val == q->val && !p->free && !q->free;
}
Generic_Print (Identifier, "#[identifier %lu]", POINTER(x))
Object Make_Id (type, val, num) XtPointer val; {
Object i;
i = Find_Object (T_Identifier, (GENERIC)0, Match_Xt_Obj, type, val);
if (Nullp (i)) {
i = Alloc_Object (sizeof (struct S_Identifier), T_Identifier, 0);
IDENTIFIER(i)->tag = Null;
IDENTIFIER(i)->type = type;
IDENTIFIER(i)->val = val;
IDENTIFIER(i)->num = num;
IDENTIFIER(i)->free = 0;
Register_Object (i, (GENERIC)0, (PFO)0, 0);
}
return i;
}
XtPointer Use_Id (x, type) Object x; {
Check_Type (x, T_Identifier);
if (IDENTIFIER(x)->type != type || IDENTIFIER(x)->free)
Primitive_Error ("invalid identifier");
IDENTIFIER(x)->free = 1;
Deregister_Object (x);
return IDENTIFIER(x)->val;
}
elk_init_xt_identifier () {
Generic_Define (Identifier, "identifier", "identifier?");
}
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