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114 lines
1.5 KiB
114 lines
1.5 KiB
2 years ago
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; Compresses the current guess to the same format as the dictionary
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; <- bc
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; <- de
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compress_guess:
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call get_guess_offset
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; first byte
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ld a, [hl+] ; letter 1
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and %00111111
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sla a
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sla a
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ld b, a
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ld a, [hl] ; letter 2
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and %00110000
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sra a
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sra a
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sra a
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sra a
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add a, b
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ld d, a
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; second byte
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ld a, [hl+] ; letter 2
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and %00001111
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sla a
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sla a
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sla a
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sla a
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ld b, a
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ld a, [hl] ; letter 3
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and %00111100
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sra a
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sra a
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add a, b
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ld e, a
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push de
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; third byte
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ld a, [hl+] ; letter 3
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and %00000011
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sla a
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sla a
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sla a
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sla a
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sla a
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sla a
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ld b, a
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ld a, [hl+] ; letter 4
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and %00111111
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add a, b
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ld d, a
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; fourth byte
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ld a, [hl] ; letter 5
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and %00111111
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sla a
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sla a
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ld e, a
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pop bc
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ret
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; Try to find the guess within the dictionary
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; -> bc
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; -> de
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; <- a
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find_guess:
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ld hl, dictionary
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.loop:
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; check if the end of the dictionary is reached
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push bc
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ld bc, dictionary_end
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ld a, h
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cp a, b
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jp nz, .not_eof
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ld a, l
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cp a, c
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jp nz, .not_eof
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pop bc
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jp .return
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.not_eof:
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pop bc
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ld a, [hl+]
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cp a, b
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jp nz, .add3
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ld a, [hl+]
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cp a, c
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jp nz, .add2
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ld a, [hl+]
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cp a, d
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jp nz, .add1
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ld a, [hl+]
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cp a, e
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jp nz, .add0
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ld a, 1
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ret
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.add3:
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inc hl
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.add2:
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inc hl
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.add1:
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inc hl
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.add0:
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jp .loop
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.return:
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ld a, 0
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ret
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