85 lines
1.8 KiB
Lua
85 lines
1.8 KiB
Lua
-- setsuna (modified bin.lua) --
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md5 = require("lib.md5")
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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] << i * 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] << i * 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] << (i * 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 << i * 8)) >> (i * 8)
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end
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end
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function setChecksumZero()
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for i = #saveFileBuffer - 15, #saveFileBuffer do
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saveFileBuffer[i] = 0x00
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end
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end
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function calcChecksum()
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saveDataOffset = 193
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checksumFileBuffer = {}
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for i = saveDataOffset, #saveFileBuffer do
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checksumFileBuffer[i - saveDataOffset + 1] = saveFileBuffer[i]
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end
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return md5.hash(string.char(table.unpack(checksumFileBuffer)))
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end
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function setNewChecksum(md5hash)
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checksumOffset = #saveFileBuffer - 16
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checksum = table.pack(md5hash:byte(1, 16))
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for i = 1, 16 do
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saveFileBuffer[checksumOffset + i] = checksum[i]
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end
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end
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function replaceChecksum()
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setChecksumZero()
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md5hash = calcChecksum()
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setNewChecksum(md5hash)
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end
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function getModifiedSaveFile()
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replaceChecksum()
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return saveFileBuffer
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end
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