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/* $Header$ */
/*
* Copyright © 2004 Keith Packard and Bart Massey.
* All Rights Reserved. See the file COPYING in this directory
* for licensing information.
*/
#include "nickle.h"
static Value
ForeignEqual (Value av, Value bv, int expandOk)
{
if (av->foreign.data == bv->foreign.data)
return TrueVal;
return FalseVal;
}
static Bool
ForeignPrint (Value f, Value av, char format, int base, int width, int prec, int fill)
{
FilePrintf (f, "foreign %s (0x%x)", av->foreign.id, av->foreign.data);
return True;
}
static HashValue
ForeignHash (Value av)
{
return (HashValue) av->foreign.data;
}
static void
ForeignMark (void *object)
{
Foreign *foreign = object;
if (foreign->mark)
(*foreign->mark) (foreign->data);
}
static int
ForeignFree (void *object)
{
Foreign *foreign = object;
if (foreign->free)
(*foreign->free) (foreign->data);
return 1;
}
ValueRep ForeignRep = {
{ ForeignMark, ForeignFree, "ForeignRep" }, /* data */
rep_foreign, /* tag */
{ /* binary */
0,
0,
0,
0,
0,
0,
0,
ForeignEqual,
0,
0
},
{
0,
0,
0,
},
0, 0,
ForeignPrint,
0,
ForeignHash,
};
int
ForeignInit (void)
{
return 1;
}
Value
NewForeign (const char *id, void *data, void (*mark) (void *data), void (*free) (void *data))
{
ENTER ();
Value ret;
ret = ALLOCATE (&ForeignRep.data, sizeof (Foreign));
ret->foreign.id = id;
ret->foreign.data = data;
ret->foreign.free = free;
ret->foreign.mark = mark;
RETURN (ret);
}
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