mirror of https://github.com/nmlgc/ReC98.git
51 lines
960 B
NASM
51 lines
960 B
NASM
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public SCOREDAT_ENCODE
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scoredat_encode proc near
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@@byte = byte ptr -1
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enter 2, 0
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push si
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mov _hi.sum, 0
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mov si, scoredat_section_t.score
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jmp short @@sum_more?
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; ---------------------------------------------------------------------------
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@@sum_loop:
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mov al, byte ptr _hi[si]
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mov ah, 0
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add _hi.sum, ax
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inc si
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@@sum_more?:
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cmp si, size scoredat_section_t
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jl short @@sum_loop
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call IRand
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mov _hi.key1, al
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call IRand
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mov _hi.key2, al
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mov [bp+@@byte], 0
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mov si, size scoredat_section_t - 1
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jmp short @@encode_more?
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; ---------------------------------------------------------------------------
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@@encode_loop:
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mov al, byte ptr _hi[si]
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mov dl, _hi.key1
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add dl, [bp+@@byte]
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sub al, dl
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mov byte ptr _hi[si], al
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mov al, byte ptr _hi[si]
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mov [bp+@@byte], al
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mov al, _hi.key2
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ror [bp+@@byte], 3
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xor [bp+@@byte], al
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dec si
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@@encode_more?:
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cmp si, scoredat_section_t.score
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jge short @@encode_loop
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pop si
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leave
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retn
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scoredat_encode endp
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