dfhack/library/lua/dumper.lua

235 lines
7.1 KiB
Lua

2012-05-08 02:55:06 -06:00
--[[ DataDumper.lua
Copyright (c) 2007 Olivetti-Engineering SA
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
]]
local _ENV = mkmodule('dumper')
local dumplua_closure = [[
local closures = {}
2015-02-14 20:53:06 -07:00
local function closure(t)
2012-05-08 02:55:06 -06:00
closures[#closures+1] = t
t[1] = assert(loadstring(t[1]))
return t[1]
end
for _,t in pairs(closures) do
2015-02-14 20:53:06 -07:00
for i = 2,#t do
debug.setupvalue(t[1], i-1, t[i])
end
2012-05-08 02:55:06 -06:00
end
]]
local lua_reserved_keywords = {
2015-02-14 20:53:06 -07:00
'and', 'break', 'do', 'else', 'elseif', 'end', 'false', 'for',
'function', 'if', 'in', 'local', 'nil', 'not', 'or', 'repeat',
2012-05-08 02:55:06 -06:00
'return', 'then', 'true', 'until', 'while' }
local function keys(t)
local res = {}
local oktypes = { stringstring = true, numbernumber = true }
local function cmpfct(a,b)
if oktypes[type(a)..type(b)] then
return a < b
else
return type(a) < type(b)
end
end
for k in pairs(t) do
res[#res+1] = k
end
table.sort(res, cmpfct)
return res
end
local c_functions = {}
2015-02-14 20:53:06 -07:00
for _,lib in pairs{'_G', 'string', 'table', 'math',
2012-05-08 02:55:06 -06:00
'io', 'os', 'coroutine', 'package', 'debug'} do
local t = _G[lib] or {}
lib = lib .. "."
if lib == "_G." then lib = "" end
for k,v in pairs(t) do
if type(v) == 'function' and not pcall(string.dump, v) then
c_functions[v] = lib..k
end
end
end
function DataDumper(value, varname, fastmode, ident, indent_step)
indent_step = indent_step or 2
local defined, dumplua = {}
-- Local variables for speed optimization
2015-02-14 20:53:06 -07:00
local string_format, type, string_dump, string_rep =
2012-05-08 02:55:06 -06:00
string.format, type, string.dump, string.rep
2015-02-14 20:53:06 -07:00
local tostring, pairs, table_concat =
2012-05-08 02:55:06 -06:00
tostring, pairs, table.concat
local keycache, strvalcache, out, closure_cnt = {}, {}, {}, 0
setmetatable(strvalcache, {__index = function(t,value)
local res = string_format('%q', value)
t[value] = res
return res
end})
local fcts = {
string = function(value) return strvalcache[value] end,
number = function(value) return value end,
boolean = function(value) return tostring(value) end,
['nil'] = function(value) return 'nil' end,
2015-02-14 20:53:06 -07:00
['function'] = function(value)
return string_format("loadstring(%q)", string_dump(value))
2012-05-08 02:55:06 -06:00
end,
userdata = function() error("Cannot dump userdata") end,
thread = function() error("Cannot dump threads") end,
}
local function test_defined(value, path)
if defined[value] then
if path:match("^getmetatable.*%)$") then
out[#out+1] = string_format("s%s, %s)\n", path:sub(2,-2), defined[value])
else
out[#out+1] = path .. " = " .. defined[value] .. "\n"
end
return true
end
defined[value] = path
end
local function make_key(t, key)
local s
if type(key) == 'string' and key:match('^[_%a][_%w]*$') then
s = key .. "="
else
s = "[" .. dumplua(key, 0) .. "]="
end
t[key] = s
return s
end
for _,k in ipairs(lua_reserved_keywords) do
keycache[k] = '["'..k..'"] = '
end
2015-02-14 20:53:06 -07:00
if fastmode then
2012-05-08 02:55:06 -06:00
fcts.table = function (value)
-- Table value
local numidx = 1
out[#out+1] = "{"
for key,val in pairs(value) do
if key == numidx then
numidx = numidx + 1
else
out[#out+1] = keycache[key]
end
local str = dumplua(val)
out[#out+1] = str..","
end
if string.sub(out[#out], -1) == "," then
out[#out] = string.sub(out[#out], 1, -2);
end
out[#out+1] = "}"
2015-02-14 20:53:06 -07:00
return ""
2012-05-08 02:55:06 -06:00
end
2015-02-14 20:53:06 -07:00
else
2012-05-08 02:55:06 -06:00
fcts.table = function (value, ident, path)
if test_defined(value, path) then return "nil" end
-- Table value
local sep, str, numidx, totallen = " ", {}, 1, 0
local meta, metastr = (debug or getfenv()).getmetatable(value)
if meta then
ident = ident + 1
metastr = dumplua(meta, ident, "getmetatable("..path..")")
totallen = totallen + #metastr + 16
end
for _,key in pairs(keys(value)) do
local val = value[key]
local s = ""
local subpath = path
if key == numidx then
subpath = subpath .. "[" .. numidx .. "]"
numidx = numidx + 1
else
s = keycache[key]
if not s:match "^%[" then subpath = subpath .. "." end
subpath = subpath .. s:gsub("%s*=%s*$","")
end
s = s .. dumplua(val, ident+1, subpath)
str[#str+1] = s
totallen = totallen + #s + 2
end
if totallen > 80 then
sep = "\n" .. string_rep(' ', indent_step*(ident+1))
end
2015-02-14 20:53:06 -07:00
str = "{"..sep..table_concat(str, ","..sep).." "..sep:sub(1,-1-indent_step).."}"
2012-05-08 02:55:06 -06:00
if meta then
sep = sep:sub(1,-3)
return "setmetatable("..sep..str..","..sep..metastr..sep:sub(1,-3)..")"
end
return str
end
fcts['function'] = function (value, ident, path)
if test_defined(value, path) then return "nil" end
if c_functions[value] then
return c_functions[value]
elseif debug == nil or debug.getupvalue(value, 1) == nil then
return string_format("loadstring(%q)", string_dump(value))
end
closure_cnt = closure_cnt + 1
local res = {string.dump(value)}
for i = 1,math.huge do
local name, v = debug.getupvalue(value,i)
if name == nil then break end
res[i+1] = v
end
return "closure " .. dumplua(res, ident, "closures["..closure_cnt.."]")
end
end
function dumplua(value, ident, path)
return fcts[type(value)](value, ident, path)
end
if varname == nil then
varname = "return "
elseif varname:match("^[%a_][%w_]*$") then
varname = varname .. " = "
end
if fastmode then
setmetatable(keycache, {__index = make_key })
out[1] = varname
table.insert(out,dumplua(value, 0))
return table.concat(out)
else
setmetatable(keycache, {__index = make_key })
local items = {}
for i=1,10 do items[i] = '' end
items[3] = dumplua(value, ident or 0, "t")
if closure_cnt > 0 then
items[1], items[6] = dumplua_closure:match("(.*\n)\n(.*)")
out[#out+1] = ""
end
if #out > 0 then
items[2], items[4] = "local t = ", "\n"
items[5] = table.concat(out)
items[7] = varname .. "t"
else
items[2] = varname
end
return table.concat(items)
end
end
return _ENV