65 lines
1.3 KiB
Lua
65 lines
1.3 KiB
Lua
do
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_G.fd,_G.io = {},{}
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function io.write(d) -- writes *d* to stdout
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fd[os.getenv("t") or 1].write(d)
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end
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function io.read(d,b) -- reads *d* from stdin, until something is returned, or b is true
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local r = ""
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repeat
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r=fd[os.getenv("t") or 1].read(d)
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coroutine.yield()
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until r or b
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return r
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end
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function print(...) -- outputs its arguments to stdout, separated by newlines
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for k,v in pairs({...}) do
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io.write(tostring(v).."\n")
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end
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end
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local function fdw(f,d)
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fd[f.fd].write(d)
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end
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local function fdr(f,d)
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return fd[f.fd].read(d)
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end
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local function fdc(f)
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fd[f.fd].close()
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fd[f.fd] = nil
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end
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function io.newfd() -- creates a new file descriptor and returns it plus its ID
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local nfd=#fd+1
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fd[nfd] = {}
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return nfd,fd[nfd]
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end
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local function fdfile(f,m) -- create a fd from a file
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local e,fobj = pcall(fs.open,f,m)
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if e and fobj then
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local fdi, fdo =io.newfd()
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if fobj.read then
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function fdo.read(d)
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return fobj:read(d)
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end
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elseif fobj.write then
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function fdo.write(d)
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return fobj:write(d)
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end
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end
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function fdo.close()
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fobj:close()
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end
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return fdi
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end
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return false
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end
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function io.open(f,m) -- opens file or file descriptor *f* with mode *m*
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if type(f) == "string" then
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f = fdfile(f,m)
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end
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if fd[f] then
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local t = {["close"]=fdc,["read"]=fdr,["write"]=fdw,["fd"]=f,["mode"]=m}
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return t
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end
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return false
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end
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end
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