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