60 lines
1.2 KiB
NASM
60 lines
1.2 KiB
NASM
cryptocmdROT: .db "ROT", 0
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cryptocmdROTm: .db "ROT: Cypher, rotates the alphabet and encodes a string", 0
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cryptocmdROTu: .db "ENCRYPT ROT <shift#> <message>", 0
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cryptocmdROTf:
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cryptocmdROTfArg1:
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ld hl, FshCmdArgFlags
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bit 3, (hl)
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jr nz, cryptocmdROTfArg2
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bit 2, (hl)
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jr z, cryptocmdROTfArg1Get
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ld hl, ErrUsageo
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call ErrSet
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call ErrCatch
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cryptocmdROTfArg1Get:
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ld hl, cryptocmdROTfDShift
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call printprompt
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ld hl, FshCmdArg1
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ld de, 3
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call inputnumstr
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call strtow
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ld de, FshCmdArg1
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ex de, hl
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ld (hl), e
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call _NewLine
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cryptocmdROTfArg2:
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ld hl, FshCmdArg2
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ld de, FshScratch
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call strcpy
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ld hl, FshCmdArgFlags
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bit 4, (hl)
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jr z, cryptocmdROTfArg2Get
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bit 5, (hl)
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jr z, cryptocmdROTfExe
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ld hl, ErrUsageo
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call ErrSet
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call ErrCatch
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cryptocmdROTfArg2Get:
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ld hl, cryptocmdROTfDMessage
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call printprompt
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ld hl, FshScratch
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ld de, FshScratchSize - 4
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call inputcharstr
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call _NewLine
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cryptocmdROTfExe:
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ld hl, FshCmdArg1
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ld a, (hl)
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ld hl, FshScratch
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call rotletencrypt
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push hl
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ld hl, cryptocmdROTfDResult
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call _PutS
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pop hl
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call _PutS
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call _NewLine
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jp Fin
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cryptocmdROTfDShift: .db "Shift= ", 0
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cryptocmdROTfDMessage: .db "Message= ", 0
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cryptocmdROTfDResult: .db "Result: ", 0
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