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