OC-PsychOS2/module/iofs.lua

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Lua
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2019-07-14 20:52:56 +10:00
iofs = {}
iofs.files = {}
iofs.fds = {}
iofs.nextfd = 0
iofs.component = {}
local function rfalse()
return false
end
function iofs.component.getLabel()
return "iofs"
end
iofs.component.spaceUsed, iofs.component.spaceTotal, iofs.component.isReadOnly, iofs.component.isDirectory,iofs.component.size, iofs.component.setLabel = function() return computer.totalMemory()-computer.freeMemory() end, computer.totalMemory, rfalse, rfalse, rfalse, rfalse
function iofs.component.exists(fname)
return iofs.files[fname] ~= nil
end
function iofs.component.list()
local t = {}
for k,v in pairs(iofs.files) do
t[#t+1] = k
end
return t
end
function iofs.component.open(fname, mode)
fname=fname:gsub("/","")
if iofs.files[fname] then
local r,w,c,s = iofs.files[fname](mode)
iofs.fds[iofs.nextfd] = {["read"]=r or rfalse,["write"]=w or rfalse,["seek"]=s or rfalse,["close"]=c or rfalse}
iofs.nextfd = iofs.nextfd + 1
return iofs.nextfd - 1
end
return false
end
function iofs.component.read(fd,count)
if iofs.fds[fd] then
return iofs.fds[fd].read(count)
end
end
function iofs.component.write(fd,data)
if iofs.fds[fd] then
return iofs.fds[fd].write(data)
end
end
function iofs.component.close(fd)
if iofs.fds[fd] then
iofs.fds[fd].close()
end
iofs.fds[fd] = nil
end
function iofs.component.seek(fd,...)
if iofs.fds[fd] then
return iofs.fds[fd].seek(...)
end
end
function iofs.register(fname,fopen) -- Register a new iofs node with the name *fname* that will run the function *fopen* when opened. This function should return a function for read, a function for write, and a function for close, in that order.
iofs.files[fname] = fopen
end
fs.mounts.iofs = iofs.component