74 lines
1.9 KiB
Lua
74 lines
1.9 KiB
Lua
-- Donkey Kong Tropical Freeze (modified bin) --
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-- IMPORTANT:
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-- Save file is big-endian!
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-- getValueFromSaveFile & setValueInSaveFile have been modified accordingly
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-- Save file is always 0x40000 bytes in size, where the first 4 bytes are
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-- the CRC32 of [0x04 .. 0x40000]
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checksum = require("lib.checksum")
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saveFileBuffer = edizon.getSaveFileBuffer()
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function getValueFromSaveFile()
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strArgs = edizon.getStrArgs()
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intArgs = edizon.getIntArgs()
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indirectAddress = tonumber(strArgs[1], 16)
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address = tonumber(strArgs[2], 16)
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addressSize = intArgs[1]
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valueSize = intArgs[2]
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offset = 0
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value = 0
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if indirectAddress ~= 0 then
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for i = 0, addressSize - 1 do
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offset = offset | (saveFileBuffer[indirectAddress + i + 1] << ((addressSize - i - 1) * 8))
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end
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end
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for i = 0, valueSize - 1 do
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value = value | (saveFileBuffer[offset + address + i + 1] << ((valueSize - i - 1) * 8))
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end
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return value
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end
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function setValueInSaveFile(value)
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strArgs = edizon.getStrArgs()
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intArgs = edizon.getIntArgs()
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indirectAddress = tonumber(strArgs[1], 16)
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address = tonumber(strArgs[2], 16)
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addressSize = intArgs[1]
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valueSize = intArgs[2]
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offset = 0
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if indirectAddress ~= 0 then
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for i = 0, addressSize - 1 do
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offset = offset | (saveFileBuffer[indirectAddress + i + 1] << ((addressSize - i - 1) * 8))
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end
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end
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for i = 0, valueSize - 1 do
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saveFileBuffer[offset + address + i + 1] = (value & (0xFF << (valueSize - i - 1) * 8)) >> ((valueSize - i - 1) * 8)
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end
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end
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function setChecksum()
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gameFileBuffer = {}
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for i = 1, 262140 do
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gameFileBuffer[i] = saveFileBuffer[i + 4]
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end
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crc = checksum.crc32(string.char(table.unpack(gameFileBuffer)))
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crc = crc ~ 0xFFFFFFFF
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for i = 0,3 do
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saveFileBuffer[i + 1] = (crc & (0xFF000000 >> (i * 8))) >> (24 - i * 8)
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end
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end
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function getModifiedSaveFile()
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setChecksum()
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return saveFileBuffer
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end
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