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Table print improvements

Merged Table print improvements
table_print_2 into master
Merged Petr Špaček requested to merge table_print_2 into master
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daemon/lua/sandbox.lua.in
+ 20
− 21
@@ -370,6 +370,11 @@ local function funcsign(f)
-- thanks to AnandA777 from StackOverflow! Function funcsign is adapted version of
-- https://stackoverflow.com/questions/51095022/inspect-function-signature-in-lua-5-1
assert(type(f) == 'function', "bad argument #1 to 'funcsign' (function expected)")
local debuginfo = debug.getinfo(f)
if debuginfo.what == 'C' then -- names N/A
return '(?)'
end
local func_args = {}
pcall(function()
local oldhook
@@ -377,28 +382,20 @@ local function funcsign(f)
local function hook()
delay = delay - 1
if delay == 0 then -- call this only for the introspected function
for i = 1, math.huge do
-- stack depth 2 is the introspected function
-- stack depth 2 is the introspected function
for i = 1, debuginfo.nparams do
local k = debug.getlocal(2, i)
if (k or '('):sub(1, 1) == '(' then
break -- internal variable, skip
else
table.insert(func_args, k)
end
table.insert(func_args, k)
end
if debug.getlocal(2, -1) then
-- vararg function
table.insert(func_args, "...")
if debuginfo.isvararg then
table.insert(func_args, "...")
end
debug.sethook(oldhook)
error('aborting the call to introspected function')
end
debug.sethook(oldhook)
error('aborting the call to introspected function')
end
end
oldhook = debug.sethook(hook, "c") -- invoke hook() on function call
-- fake arguments, necessary to detect vararg functions
local fakearg = {}
for _ = 1, 64 do fakearg[#fakearg + 1] = true end
f(unpack(fakearg)) -- huh?
oldhook = debug.sethook(hook, "c") -- invoke hook() on function call
f(unpack({})) -- huh?
end)
return "(" .. table.concat(func_args, ", ") .. ")"
end
@@ -445,8 +442,9 @@ function table_print (tt, indent, done)
result = result .. string.rep (" ", indent)
result = result .. "}\n"
elseif type (value) == "function" then
result = result .. string.format("[%s] => function %s%s\n",
tostring(key), tostring(key), funcsign(value))
result = result .. string.format("[%s] => function %s%s: %s\n",
tostring(key), tostring(key), funcsign(value),
string.sub(tostring(value), 11))
else
result = result .. string.format("[%s] => %s\n",
tostring (key), printable(value))
@@ -455,7 +453,8 @@ function table_print (tt, indent, done)
else -- not a table
local tt_str
if type(tt) == "function" then
tt_str = string.format("function%s\n", funcsign(tt))
tt_str = string.format("function%s: %s\n", funcsign(tt),
string.sub(tostring(tt), 11))
else
tt_str = tostring(tt)
end