86 lines
2.0 KiB
Lua
86 lines
2.0 KiB
Lua
local velx_spec = struct {
|
|
endian = "<",
|
|
{magic="c5"},
|
|
{fver="B"},
|
|
{compression="B"},
|
|
{lver="B"},
|
|
{os="B"},
|
|
{arctype="c4"},
|
|
{psize="I3"},
|
|
{lsize="I3"},
|
|
{ssize="I3"},
|
|
{rsize="I4"}
|
|
}
|
|
|
|
local velx = {}
|
|
|
|
local exec = {}
|
|
|
|
function velx.identify(path)
|
|
local h = io.open(path, "rb")
|
|
local header = velx_spec(h:read(#velx_spec))
|
|
h:close()
|
|
return header.magic == "\27VelX"
|
|
end
|
|
|
|
function velx.load(path)
|
|
local h = io.open(path, "rb")
|
|
local header = velx_spec(h:read(#velx_spec))
|
|
local code = h:read(header.psize)
|
|
h:seek("cur", lsize)
|
|
local sig = h:read(header.ssize)
|
|
end
|
|
|
|
function velx.verify(path)
|
|
local h = io.open(path, "rb")
|
|
local header = velx_spec(h:read(#velx_spec))
|
|
local code = h:read(header.psize)
|
|
h:seek("cur", lsize)
|
|
local sig = h:read(header.ssize)
|
|
h:close()
|
|
return security.verify(code, sig)
|
|
end
|
|
|
|
function exec:link()
|
|
self.file:seek("set", #velx_spec+self.header.psize)
|
|
local linkinfo = self.file:read(self.header.lsize)
|
|
local linker = {}
|
|
local pos = 1
|
|
while true do
|
|
local size = string.unpack("<H", linkinfo:sub(pos))
|
|
pos = pos + 2
|
|
local name = linkinfo:sub(pos, pos+size-1)
|
|
pos = pos + size
|
|
size = string.unpack("<H", linkinfo:sub(pos))
|
|
pos = pos + 2
|
|
local library = linkinfo:sub(pos, pos+size-1)
|
|
pos = pos + size
|
|
if (name == "" or library == "") then
|
|
break
|
|
end
|
|
linker[#linker+1] = {name, library}
|
|
end
|
|
local linkscript = ""
|
|
for i=1, #linker do
|
|
linkscript = linkscript .. "local " .. linker[i][1] .. "=require(\"" .. linker[i][2] .. "\")\n"
|
|
end
|
|
self.code = linkscript .. self.code
|
|
return true
|
|
end
|
|
|
|
function exec:load()
|
|
self.file:seek("set", #velx_spec)
|
|
local code = self.file:read(self.header.psize)
|
|
if (self.header.compression == 0) then
|
|
self.code = code
|
|
elseif (self.header.compression == 1) then
|
|
self.code = lzss.decompress(self.code)
|
|
else
|
|
return nil, "invalid compression method"
|
|
end
|
|
return true
|
|
end
|
|
|
|
function exec:run(args, evar)
|
|
system.load(self.code, args, system.getglobalenv({_ARCHIVE=self.arc}), system.getevars(evar))
|
|
end |