pdisc/standardbefehlssatz.lua

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local WNOA = "wrong number of arguments"
local UAT = "unsupported argument type"
local SE = "error with cmd-cmd executing: "
local STRL = "attempt on exceeding maximum string length"
local s
s = {
mov = function(params)
if #params ~= 2 then
return false, WNOA
end
return true, params[2]
end,
getvar = function(params, faden)
local p = params[1]
if type(p) ~= "string" then
return false, UAT
end
p = faden.vars[p]
return true, {p, params[2] and p ~= nil}
end,
add = function(params, faden)
if #params ~= 2 then
return false, WNOA
end
local p1,p2 = unpack(params)
local t1 = type(p1)
local t2 = type(p2)
if t1 ~= t2 then
return false, "different argument types"
end
if t1 == "number" then
return true, p1 + p2
end
if t1 == "boolean" then
return true, p1 and p2
end
if #p1 + #p2 > faden.strlen_max then
return false, STRL
end
return true, p1 .. p2
end,
mul = function(params)
if #params ~= 2 then
return false, WNOA
end
local p1,p2 = unpack(params)
local t1 = type(p1)
local t2 = type(p2)
if t1 == "string"
and t2 == "number" then
if #p1 * p2 > faden.strlen_max then
return false, STRL
end
return true, p1:rep(p2)
end
if t1 ~= t2 then
return false, "different argument types"
end
if t1 == "number" then
return true, p1 * p2
end
if t1 == "boolean" then
return true, p1 or p2
end
return false, UAT
end,
neg = function(params)
if #params ~= 1 then
return false, WNOA
end
local v = params[1]
local t = type(v)
if t == "number" then
return true, -v
end
if t == "boolean" then
return true, not v
end
return true, v:rev()
end,
inv = function(params)
if #params ~= 1 then
return false, WNOA
end
local p = params[1]
if type(p) ~= "number" then
return false, UAT
end
return true, 1 / p
end,
mod = function(params)
if #params ~= 2 then
return false, WNOA
end
local p1,p2 = unpack(params)
if type(p1) ~= "number" or type(p2) ~= "number" then
return false, UAT
end
return true, p1 % p2
end,
jmp = function(params, faden)
local pcnt = #params
if pcnt == 2 then
if not params[2] then
return true
end
elseif pcnt ~= 1 then
return false, WNOA
end
local p = params[1]
if type(p) ~= "number" then
return false, UAT
end
if p < 1
or p%1 ~= 0
or p > #faden.liste + 1 then
return false, "jump target out of range"
end
faden.ip = p-1
if not s.usleep({0}, faden) then
error(SE)
end
return true
end,
call = function(params, faden)
if #params ~= 1 then
return false, WNOA
end
local subsucc,msg = s.push(faden.ip + 1, faden)
if not subsucc then
return false, SE .. msg
end
subsucc,msg = s.jmp(params, faden)
if not subsucc then
return false, SE .. msg
end
return true
end,
ret = function(_, faden)
local subsucc,msg = s.pop({true}, faden)
if not subsucc then
return false, SE .. msg
end
subsucc,msg = s.jmp(msg, faden)
if not subsucc then
return false, SE .. msg
end
return true
end,
push = function(params, faden)
local pc = #params
if pc == 0 then
return false, WNOA
end
for i = 1,pc do
faden.stack[faden.sp] = params[i]
faden.sp = faden.sp-1
end
if faden.sp < 0 then
return false, "stack overflow"
end
return true
end,
pop = function(params, faden)
local pc = #params
if pc == 0 then
return false, WNOA
end
local rt = {}
for i = 1,pc do
faden.sp = faden.sp+1
rt[i] = faden.stack[faden.sp]
end
if faden.sp > faden.sb then
return false, "stack underflow"
end
return true, rt
end,
equal = function(params)
if #params ~= 2 then
return false, WNOA
end
return true, params[1] == params[2]
end,
less = function(params)
if #params ~= 2 then
return false, WNOA
end
local p1,p2 = unpack(params)
local t1 = type(p1)
local t2 = type(p2)
if t1 ~= t2 then
return false, "different argument types"
end
if t1 ~= "number"
and t1 ~= "string" then
return false, UAT
end
return true, p1 < p2
end,
usleep = function(params, faden)
if #params ~= 1 then
return false, WNOA
end
local p = params[1]
if type(p) ~= "number" then
return false, UAT
end
faden.rebirth = minetest.get_us_time() + p
faden:stop()
return true
end,
sleep = function(params, faden)
if #params ~= 1 then
return false, WNOA
end
local p = params[1]
if type(p) ~= "number" then
return false, UAT
end
subsucc,msg = s.usleep({p * 1000000}, faden)
if not subsucc then
return false, SE .. msg
end
return true
end,
get_us_time = function()
return true, minetest.get_us_time()
end,
tostring = function(params)
if #params ~= 1 then
return false, WNOA
end
return true, tostring(params[1])
end,
print = function(params, faden)
for i = 1,#params do
params[i] = tostring(params[i])
end
faden.log = faden.log .. table.concat(params, "\t") .. "\n"
return true
end,
flush = function(params, faden)
return faden:flush(params)
end,
}
local so_math_fcts = {"sin", "asin", "cos", "acos", "tan", "atan", "exp", "log",
"abs", "sign", "floor", "ceil"}
for i = 1,#so_math_fcts do
i = so_math_fcts[i]
s[i] = function(params)
if #params ~= 1 then
return false, WNOA
end
local p = params[1]
if type(p) ~= "number" then
return false, UAT
end
return true, math[i](p)
end
end
local to_math_fcts = {"pow"}
for i = 1,#to_math_fcts do
i = to_math_fcts[i]
s[i] = function(params)
if #params ~= 2 then
return false, WNOA
end
local p1,p2 = unpack(params)
if type(p1) ~= "number"
or type(p2) ~= "number" then
return false, UAT
end
return true, math[i](p1, p2)
end
end
return s