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#include <stdio.h>
#include "mlvalues.h"
value equal(v1, v2)
value v1, v2;
{
header_t hdr1, hdr2;
long size, i;
tailcall:
if (v1 == v2) return Val_true;
if (v1 & 1) return Val_false;
if (v1 & 1) return Val_false;
hdr1 = Header_val(v1) & ~Modified_mask;
hdr2 = Header_val(v2) & ~Modified_mask;
switch(Tag_header(hdr1)) {
case Closure_tag:
case Infix_tag:
fprintf(stderr, "equal between functions\n");
exit(2);
case String_tag:
if (hdr1 != hdr2) return Val_false;
size = Size_header(hdr1);
for (i = 0; i < size; i++)
if (Field(v1, i) != Field(v2, i)) return Val_false;
return Val_true;
case Double_tag:
if (Double_val(v1) == Double_val(v2))
return Val_true;
else
return Val_false;
case Abstract_tag:
case Finalized_tag:
fprintf(stderr, "equal between abstract types\n");
exit(2);
default:
if (hdr1 != hdr2) return Val_false;
size = Size_header(hdr1);
for (i = 0; i < size-1; i++)
if (equal(Field(v1, i), Field(v2, i)) == Val_false) return Val_false;
v1 = Field(v1, i);
v2 = Field(v2, i);
goto tailcall;
}
}
value notequal(v1, v2)
value v1, v2;
{
return (4 - equal(v1, v2));
}
#define COMPARISON(name) \
value name(v1, v2) \
value v1, v2; \
{ \
fprintf(stderr, "%s not implemented.\n", #name); \
exit(2); \
}
COMPARISON(greaterequal)
COMPARISON(lessequal)
COMPARISON(greaterthan)
COMPARISON(lessthan)
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