mirror of
https://github.com/Adorable-Catgirl/Zorya-NEO.git
synced 2024-11-14 22:38:07 +11:00
40 lines
1.0 KiB
Lua
40 lines
1.0 KiB
Lua
|
local component = component
|
||
|
|
local osdi = {}
|
||
|
|
|
||
|
|
local function decode_entry(ent)
|
||
|
|
local start, size, ptype, flags, name = string.unpack("<i4i4c8i3c13", ent)
|
||
|
|
return {
|
||
|
|
start = start,
|
||
|
|
size = size,
|
||
|
|
type = ptype,
|
||
|
|
flags = flags,
|
||
|
|
name = name:sub(1, name:match("\0")-1)
|
||
|
|
}
|
||
|
|
end
|
||
|
|
|
||
|
|
local function encode_entry(ent)
|
||
|
|
ent.name = ent.name:sub(1, 12)
|
||
|
|
ent.name = ent.name .. string.rep("\0", 13-#ent.name)
|
||
|
|
ent.type = ent.type:sub(1, 8)
|
||
|
|
ent.type = ent.type .. string.rep("\0", 8-#ent.type)
|
||
|
|
return string.pack("<i4i4c8i3c13", ent.start, ent.size, ent.type, ent.flags, ent.name)
|
||
|
|
end
|
||
|
|
|
||
|
|
function osdi.read_table(addr)
|
||
|
|
local sec = component.invoke(addr, "readSector", 1)
|
||
|
|
local tbl = {}
|
||
|
|
for i=0, 15 do
|
||
|
|
tbl[i+1] = decode_entry(sec:sub((i*32)+1, (i+1)*32))
|
||
|
|
end
|
||
|
|
return tbl
|
||
|
|
end
|
||
|
|
|
||
|
|
function osdi.write_entry(addr, i, tbl)
|
||
|
|
i = i - 1
|
||
|
|
local sec = component.invoke(addr, "readSector", 1)
|
||
|
|
local dat1, dat2 = sec:sub(1, (i*32)), sec:sub(((i+1)*32)+1)
|
||
|
|
component.invoke(addr, "writeSector", 1, dat1..encode_entry(tbl)..dat2)
|
||
|
|
return true
|
||
|
|
end
|
||
|
|
|
||
|
|
return osdi
|