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liskel2.lua
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liskel2.lua
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--[[
===========
Liskel OS
===========
Description:
A barebones operating system that is
designed to give the programs full
control over the system. Boots up to
a lua interpreter if autorun.lua
does not exist.
]]
_osname = 'Liskel OS'
_osversion = '2.2.1'
-- ========== INIT START ========== --
--+-+-+-+-+ Require +-+-+-+-+--
function require(pkg)
if type(pkg) ~= 'string' then return nil end
return _ENV[pkg] or _G[pkg]
end
--+-+-+-+-+ Component +-+-+-+-+--
setmetatable(component, { __index = function(_, k) return component.getPrimary(k) end })
fsaddr = component.invoke(component.list("eeprom")(), "getData")
local _component_primaries = {}
_component_primaries['filesystem'] = component.proxy(fsaddr)
function component.setPrimary(dev, addr)
for k,v in component.list() do
if k == addr and v == dev then
_component_primaries[dev] = component.proxy(addr)
end
end
end
function component.getPrimary(dev)
if _component_primaries[dev] == null then
for k, v in component.list() do
if v == dev then component.setPrimary(v,k) break end
end
end
return _component_primaries[dev]
end
--+-+-+-+-+ Graphics +-+-+-+-+--
g = {
bind = function()
local screen = component.list('screen')()
return component.gpu.bind(screen)
end,
available = function()
local gpu, screen = component.list('gpu')(), component.list('screen')()
return (gpu and screen)
end,
copy = component.gpu.copy,
getResolution = component.gpu.getResolution,
setResolution = component.gpu.setResolution,
getDepth = component.gpu.maxDepth,
setBG = component.gpu.setBackground,
setFG = component.gpu.setForeground,
fill = function(x, y, w, h)
return component.gpu.fill(x, y, w, h, ' ')
end,
fillc = component.gpu.fill,
drawText = component.gpu.set,
}
local w, h = g.getResolution()
local cx, cy = (w / 2), (h / 2)
--+-+-+-+-+ Filesystem +-+-+-+-+--
f = {
addr = fsaddr,
setBootAddress = function(addr) f.addr = addr end,
open = component.filesystem.open,
read = function(handle) return component.filesystem.read(handle, math.huge) end,
write = component.filesystem.write,
close = component.filesystem.close,
list = function(dir) return component.filesystem.list(dir or '/') end,
mkdir = component.filesystem.makeDirectory,
rename = component.filesystem.rename,
remove = component.filesystem.remove,
readfile = function(file)
local hdl, err = f.open(file, 'r')
if not hdl then error(err) end
local buffer = ''
repeat
local data, err_read = f.read(hdl)
if not data and err_read then error(err_read) end
buffer = buffer .. (data or '')
until not data
f.close(hdl)
return buffer
end,
loadfile = function(file) return load(f.readfile(file), '=' .. file) end,
runfile = function(file, argc, args)
local prog, err = f.loadfile(file .. ".lua")
if prog then
local res = table.pack(xpcall(prog, function(...) return debug.traceback() end, argc, args))
if res[1] then
return table.unpack(res, 2, res.n)
else
error(res[2])
end
else
error(err)
end
end,
}
f.load = f.loadfile
f.run = f.runfile
--+-+-+-+-+ Error +-+-+-+-+--
std_error = error
function error(msg)
g.setFG(0xFFFFFF)
g.setBG(0x000000)
g.fill(1, 1, w, h)
-- write to screen
local line = 1
local prev = 1
for w in string.gmatch(msg, '()\n') do
g.drawText(1, line, msg:sub(prev, w - 1))
prev = w + 1
line = line + 1
end
g.drawText(1, line, msg:sub(prev))
-- write to log
local hdl, errf = f.open('error_log.txt', 'w')
if hdl then
f.write(hdl, msg .. '\n')
end
f.close(hdl)
repeat
local e, addr, char, code = computer.pullSignal()
until e == 'key_down' and code == 28
computer.shutdown(true)
end
-- ========== INIT END ========== --
console = {}
-- table serialize function
function console.Serialize(o, depth)
local function ser(o, depth, ind)
ind = ind or 1
depth = depth or 3
depth = depth - 1
local indn = 0
local indent = ''
while indn < ind do
indent = indent .. ' '
indn = indn + 1
end
local retstr = ''
if type(o) == "number" then
retstr = retstr .. o .. ''
elseif type(o) == "boolean" then
retstr = retstr .. tostring(o)
elseif type(o) == "string" then
retstr = retstr .. string.format("%q", o) .. ''
elseif type(o) == "table" then
if depth <= 0 then return '<' .. type(o) .. '>' end
retstr = retstr .. '{\n'
for k, v in pairs(o) do
retstr = retstr .. indent .. '' .. k .. '='
retstr = retstr .. ser(v, depth, ind + 1)
retstr = retstr .. ',\n'
end
retstr = retstr .. indent:sub(1, indent:len() - 2) .. '}'
else
retstr = retstr .. '<' .. type(o) .. '>'
end
return retstr
end
return ser(o, depth)
end
-- array to string / string to array
function console.ArrayToStr(tabl)
local retval = ''
for i = 1, #tabl do
retval = retval .. tabl[i]
end
return retval
end
function console.StrToArray(str)
local retval = {}
for i = 1, #str do
table.insert(retval, str:sub(i, i))
end
return retval
end
-- line output
function console.lineout(str, line)
g.fill(1, line, w, 1)
g.drawText(1, line, str)
end
function console.lineoutoff(str, line, offs)
offs = offs or 1
g.fill(offs, line, w, 1)
g.drawText(offs, line, str)
end
-- history buffer
console.history = { -- history system
mem = {}, -- output lines history
cmdmem = {}, -- command history
size = h * 10, -- history size (10 screens)
viewheight = h - 1, -- height of viewport
viewbottom = 1, -- current viewport bottom line
prevbottom = 1, -- previous view bottom
recallptr = 1, -- pointer for line recall fuction
printoffset = 1, -- print offset x-axis
lnum = 1, -- line number accumulator
scrspeed = 5, -- scroll speed
scrdir = 0, -- scroll direction
}
function console.history.PrintAll()
-- reprint viewport
if next(console.history.mem) == nil then return end
for i = 1, console.history.viewheight - 1 do
local bot = console.history.viewbottom - (i - 1)
if bot <= 0 then return end
local toprint = console.history.mem[bot]
local cpos = console.history.viewheight - (i - 1)
console.lineoutoff(toprint, cpos, console.history.printoffset)
end
end
function console.history.Update()
-- update viewport
if next(console.history.mem) == nil then return end
if console.history.scrdir == 0 then
console.history.PrintAll()
elseif console.history.scrdir > 0 then
-- user scrolled up
g.copy(1,2, w, h-console.history.scrspeed-2, 0, console.history.scrspeed)
for i = 1, console.history.scrspeed do
local bot = (console.history.viewbottom - console.history.viewheight + 1 + console.history.scrspeed) - (i - 1)
if bot <= 0 then return end
local toprint = console.history.mem[bot]
local cpos = 1 + console.history.scrspeed - (i - 1)
console.lineoutoff(toprint, cpos, console.history.printoffset)
end
elseif console.history.scrdir < 0 then
-- user scrolled down
g.copy(1,2 + console.history.scrspeed, w, h-console.history.scrspeed-2, 0, -console.history.scrspeed)
for i = 1, console.history.scrspeed do
local bot = console.history.viewbottom - (i - 1)
if bot <= 0 then return end
local toprint = console.history.mem[bot]
local cpos = console.history.viewheight - (i - 1)
console.lineoutoff(toprint, cpos, console.history.printoffset)
end
end
console.history.scrdir = 0 -- reset
end
function console.history.ScrollEnd()
console.history.prevbottom = console.history.viewbottom
console.history.viewbottom = #console.history.mem
console.history.PrintAll() -- reprint history
end
function console.history.ScrollTop()
console.history.prevbottom = console.history.viewbottom
console.history.viewbottom = h - 2
console.history.PrintAll() -- reprint history
end
function console.history.ScrollUp(scr)
scr = scr or 1
if #console.history.mem < console.history.viewheight then return end
console.history.prevbottom = console.history.viewbottom
console.history.viewbottom = console.history.viewbottom - scr
console.history.scrdir = 1
if console.history.viewbottom <= console.history.viewheight - 1 then
console.history.scrdir = 0
console.history.viewbottom = console.history.viewheight - 1
end
console.history.Update() -- print out history
end
function console.history.ScrollDown(scr)
scr = scr or 1
console.history.prevbottom = console.history.viewbottom
console.history.viewbottom = console.history.viewbottom + scr
console.history.scrdir = -1
if console.history.viewbottom >= #console.history.mem then
console.history.scrdir = 0
console.history.viewbottom = #console.history.mem
end
console.history.Update() -- print out history
end
function console.history.MoveRecall(pos)
if next(console.history.cmdmem) == nil then return end
pos = pos or 0
console.history.recallptr = console.history.recallptr + pos
if console.history.recallptr >= #console.history.cmdmem then
console.history.recallptr = #console.history.cmdmem
elseif console.history.recallptr <= 1 then
console.history.recallptr = 1
end
end
function console.history.ResetRecall()
console.history.recallptr = #console.history.cmdmem
end
function console.history.Recall()
if next(console.history.cmdmem) == nil then return "" end
return console.history.cmdmem[console.history.recallptr]
end
function console.history.Add(str)
str = " " .. tostring(console.history.lnum) .. " | " .. str
table.insert(console.history.mem, str)
console.history.viewbottom = #console.history.mem
console.history.recallptr = #console.history.cmdmem + 1
console.history.Update()
console.history.lnum = console.history.lnum + 1
end
function console.history.AddInp(str)
table.insert(console.history.cmdmem, str)
console.history.Add(str)
end
-- input buffer
console.input = {
buffer = {}, -- input buffer
col = 1, -- current input column
printoffset = 1, -- print offset
}
function console.input.Print()
-- print input
local out = console.ArrayToStr(console.input.buffer)
console.lineoutoff(out, h, console.input.printoffset)
end
function console.input.SetPrintOffset(offs)
console.input.printoffset = offs
end
function console.input.Append(str)
-- append to input buffer
table.insert(console.input.buffer, str)
console.input.Print()
end
function console.input.Insert(str, pos)
-- insert in input buffer
pos = pos or console.input.col
table.insert(console.input.buffer, pos, str)
console.input.Print()
end
function console.input.SetPos(pos)
-- set cursor position
pos = pos or #console.input.buffer
if pos < 1 then pos = 1 end
if pos > #console.input.buffer then pos = #console.input.buffer + 1 end
console.input.col = pos
end
function console.input.MovePos(mov)
-- move cursor position
local pos = console.input.col + mov
console.input.SetPos(pos)
end
function console.input.GetCharAtPos()
return console.input.buffer[console.input.col]
end
function console.input.GetString()
return console.ArrayToStr(console.input.buffer)
end
function console.input.DelChar()
table.remove(console.input.buffer, console.input.col)
console.input.Print()
end
function console.input.Clear()
console.input.buffer = {}
console.input.col = 1
console.input.Print()
end
function console.input.SetBuffer(str)
console.input.buffer = console.StrToArray(str)
console.input.col = #console.input.buffer + 1
console.input.Print()
end
-- print function
function console.print(str)
if type(str) == 'table' then
str = console.Serialize(str)
else
str = tostring(str)
end
local prev = 1
for w in string.gmatch(str, '()\n') do
console.history.Add(str:sub(prev, w - 1))
prev = w + 1
end
console.history.Add(str:sub(prev))
end
-- console function
function console.Run()
-- screen clear
g.fill(1, 2, w, h)
-- print os header
g.setFG(0x000000)
g.setBG(0xFFFFFF)
g.fill(1, 1, w, 1)
g.drawText(1, 1, " " .. _osname .. " " .. _osversion)
g.setFG(0xFFFFFF)
g.setBG(0x000000)
-- console init
local console_header = "#> "
local blinkon = true
local hist = console.history
local inp = console.input
print = console.print
console.lineout(console_header, h)
inp.SetPrintOffset(#console_header + 1)
-- intro text
print("* F12 to restart *")
print("* F10 to shutdown *")
-- console loop start
while true do
local evt = table.pack(computer.pullSignal(0.4))
if evt[1] == 'key_down' then
if evt[4] == 88 then computer.shutdown(true) end -- F12 to restart
if evt[4] == 68 then computer.shutdown() end -- F10 to shutdown
-- command
if evt[4] == 28 then -- enter key
hist.AddInp(inp.GetString()) -- add input to history
console.lineout(console_header, h)
-- parse command --
local luacmd = inp.GetString() -- get string
-- execute --
local loaded, lderr = load(luacmd, '=cinput')
if loaded then
local res, err = xpcall(loaded, function(msg) return msg .. '\n' .. debug.traceback() end)
if not res and err then
print(err)
end
elseif not loaded and lderr then
print(lderr)
else
print('Unknown Command')
end
-- done --
inp.Clear() -- clear input buffer
elseif evt[4] == 14 then -- backspace
if inp.col > 1 then
inp.MovePos(-1)
inp.DelChar()
hist.ResetRecall()
end
elseif evt[4] == 200 then -- up key
hist.MoveRecall(-1)
inp.SetBuffer(hist.Recall())
elseif evt[4] == 208 then -- down key
hist.MoveRecall(1)
inp.SetBuffer(hist.Recall())
elseif evt[4] == 203 then -- left key
inp.MovePos(-1)
elseif evt[4] == 205 then -- right key
inp.MovePos(1)
elseif evt[4] == 199 then -- home
inp.MovePos(-99999)
elseif evt[4] == 207 then -- end
inp.MovePos(99999)
elseif evt[3] ~= 0 then -- printable keys
local char = string.char(evt[3])
inp.Insert(char)
inp.MovePos(1)
end
elseif evt[1] == 'scroll' then
if evt[5] > 0 then -- scroll up
hist.ScrollUp(hist.scrspeed)
elseif evt[5] < 0 then -- scroll down
hist.ScrollDown(hist.scrspeed)
end
end
if blinkon then -- cursor blink
local posx = console.input.col + console.input.printoffset - 1
g.setBG(0xFFFFFF)
g.fill(posx, h, 1, 1)
g.setBG(0x000000)
blinkon = false
else
inp.Print()
blinkon = true
end
end
end
-- console main
local function main()
console.Run()
end
-- autorun
if component.filesystem.exists('autorun.lua') then
f.runfile('autorun')
end
-- run shell
local res, err = xpcall(main, function(msg) return msg .. '\n' .. debug.traceback() end)
if not res and err then
error(err)
end
computer.shutdown()