OC-PsychOS/modules/lib/buffer.lua

_G.buffer = {}
function buffer.ucreate()
 local b = {}
 b.b,b.s = "","open"
 function b.write(s,d)
  if b.s == "open" then
   s.b = s.b .. tostring(d)
   return(tostring(d):len())
  end
 end
 function b.read(s,l)
  if b.s == "open" then
   if type(l) == "number" then
    local ns,bs=s.b:sub(1,l),s.b:sub(l+1)
    s.b = bs
    return ns
   elseif type(l) == "string" then
    if l == "*a" then
     local oS = s.b
     s.b = ""
     return oS
    elseif l == "*l" then
     local S=s.b:find("\n") or #s.b
     local rs = s.b:sub(1,S-1)
     s.b=s.b:sub(S+1)
     return rs
    end
   end
  end
 end
 function b.close(s)
  s.s="closed"
 end
 return b
end
function buffer.bcreate()
 local b1, b2 = {}, {}
 b1.c, b2.c, b1.b, b2.b, b1.s, b2.s = 1, 2, "", "", "open","open"
 local function wt(s,d)
  if s.c == 1 then s = b2 else s = b1 end -- I'm a terrible person
  if s.s == "open" then
   s.b = s.b .. tostring(d)
   return(tostring(d):len())
  else return false end
 end
 local function rd(s,d)
  if s.c == 1 then s = b2 else s = b1 end
  if type(l) == "number" then
   local ns,bs=s.b:sub(1,l+1),s.b:sub(l+2)
   s.b = bs
   return ns
  elseif type(l) == "string" then
   if l == "*a" then
    local oS = s.b
    s.b = ""
    return oS
   elseif l == "*l" then
    local S=s.b:find("\n") or #s.b
    local rs = s.b:sub(1,S-1)
    s.b=s.b:sub(S+1)
    return rs
   else return end
  else return end
 end
 local function cl(s)
  b1.s = "closed"
  b2.s = "closed"
 end
 b1.write, b2.write = wt, wt
 b1.read, b2.read = rd,rd
 b1.close, b2.close = cl,cl
 return b1, b2
end
buffer.create = buffer.ucreate