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-- Copyright (C) 2007-2015 by Ubaldo Porcheddu <ubaldo@eja.it>
eja.lib.export='ejaVmFileExport'
eja.help.export='vm export (file)'
function ejaVmInt2Hex(int) return ejaSprintf('i%X',int) end
function ejaVmByte2Hex(int) return ejaSprintf('b%X',int) end
function ejaVmInstr2Hex(int) return ejaSprintf('I%X',int) end
function ejaVmSize2Hex(int) return ejaSprintf('s%X',int) end
function ejaVmNum2Hex(int) return ejaSprintf('n%X',int) end
function ejaVmString2Hex(data)
local out='S'
local i
for i=1,#data do out=out..ejaSprintf('%02X',data:byte(i)) end
return out
end
function ejaVmHex2Byte(little,hex,len)
local o=''
local n=tonumber(hex,16)
for i=1,len do
o=string.char(n%256)..o
n=math.floor(n/256)
end
if little > 0 then o=o:reverse() end
return o
end
function ejaVmByte2Int(little,data)
local n=0
if little > 0 then
for i=#data,1,-1 do n=n+tonumber(data:byte(i)*(256^i)) end
else
for i=1,#data do n=n+(data:byte(i)*(256^i)) end
end
return n/256
end
function ejaVmFunction(h,d,pos) --header, data, position
local o={}
local i=0
local z=0
local p=pos
local debug=false
o[#o+1]=ejaVmInt2Hex(ejaVmByte2Int(h.endian,d:sub(p,p+h.int-1))); p=p+h.int; --first line
o[#o+1]=ejaVmInt2Hex(ejaVmByte2Int(h.endian,d:sub(p,p+h.int-1))); p=p+h.int; --last line
o[#o+1]=ejaVmByte2Hex(d:byte(p)); p=p+1; --num params
o[#o+1]=ejaVmByte2Hex(d:byte(p)); p=p+1; --is vararg
o[#o+1]=ejaVmByte2Hex(d:byte(p)); p=p+1; --max stack size
if debug then o[#o+1]='\ninstr\n' end
z=ejaVmByte2Int(h.endian,d:sub(p,p+h.int-1));
o[#o+1]=ejaVmInt2Hex(z); p=p+h.int; --length of Instruction block
for n=1,z do
o[#o+1]=ejaVmInstr2Hex(ejaVmByte2Int(h.endian,d:sub(p,p+h.Instr-1))); p=p+h.Instr; --Instruction
end
if debug then o[#o+1]='\nconst\n' end
z=ejaVmByte2Int(h.endian,d:sub(p,p+h.int-1));
o[#o+1]=ejaVmInt2Hex(z); p=p+h.int; --length of constant
for n=1,z do
local cType=d:byte(p);
o[#o+1]=ejaVmByte2Hex(cType); p=p+1; --const type
if cType == 4 then
local l=ejaVmByte2Int(h.endian,d:sub(p,p+h.size-1));
o[#o+1]=ejaVmSize2Hex(l); p=p+h.size; --string length
if l > 0 then
o[#o+1]=ejaVmString2Hex(d:sub(p,p+l-1)); p=p+l; --string
end
end
if cType == 3 then
o[#o+1]=ejaVmNum2Hex(ejaVmByte2Int(h.endian,d:sub(p,p+h.num-1))); p=p+h.num; --number
end
if cType == 1 then
o[#o+1]=ejaVmByte2Hex(d:byte(p)); p=p+1; --boolean
end
if cType == 0 then end --nil
end
if debug then o[#o+1]='\nproto\n' end
z=ejaVmByte2Int(h.endian,d:sub(p,p+h.int-1));
o[#o+1]=ejaVmInt2Hex(z); p=p+h.int; --length of function
for n=1,z do
local t,n=ejaVmFunction(h,d,p)
p=p+n
o[#o+1]=t
end
if debug then o[#o+1]='\nupvalue\n' end
z=ejaVmByte2Int(h.endian,d:sub(p,p+h.int-1));
o[#o+1]=ejaVmInt2Hex(z); p=p+h.int; --length of upvalues
for n=1,z do
o[#o+1]=ejaVmByte2Hex(d:byte(p)); p=p+1; --stack
o[#o+1]=ejaVmByte2Hex(d:byte(p)); p=p+1; --idx
end
if debug then o[#o+1]='\nsource\n' end
l=ejaVmByte2Int(h.endian,d:sub(p,p+h.size-1));
o[#o+1]=ejaVmSize2Hex(0); p=p+h.size; --string length
if l > 0 then
p=p+l; --string
end
if debug then o[#o+1]='\nline info\n' end
z=ejaVmByte2Int(h.endian,d:sub(p,p+h.int-1));
o[#o+1]=ejaVmInt2Hex(0); p=p+h.int; --length of line
for n=1,z do
p=p+h.int; --begin
end
if debug then o[#o+1]='\nlocals\n' end
z=ejaVmByte2Int(h.endian,d:sub(p,p+h.int-1));
o[#o+1]=ejaVmInt2Hex(0); p=p+h.int; --length of local vars
for n=1,z do
local l=ejaVmByte2Int(h.endian,d:sub(p,p+h.size-1));
p=p+h.size; --string length
if l > 0 then
p=p+l; --string
end
p=p+h.int; --begin
p=p+h.int; --end
end
if debug then o[#o+1]='\nupvalues\n' end
z=ejaVmByte2Int(h.endian,d:sub(p,p+h.int-1));
o[#o+1]=ejaVmInt2Hex(0); p=p+h.int; --length of upvalues
for n=1,z do
local l=ejaVmByte2Int(h.endian,d:sub(p,p+h.size-1));
p=p+h.size; --string length
p=p+l; --string
end
return table.concat(o),p-pos
end
function ejaVmHeader(data)
local h={}
h.version=data:byte(5);
h.format=data:byte(6)
h.endian=data:byte(7)
h.int=data:byte(8)
h.size=data:byte(9)
h.Instr=data:byte(10)
h.num=data:byte(11)
h.integral=data:byte(12)
return h
end
function ejaVmExport(data)
local o='ejaVM';
local h=ejaVmHeader(data)
local t,n=ejaVmFunction(h,data,12+6+1)
return o..t
end
function ejaVmImport(data)
if data:sub(1,5) == 'ejaVM' then
local o={}
local h=''
o[#o+1]=string.dump(loadstring("do end")):sub(1,18)
h=ejaVmHeader(o[1])
for k,v in data:gmatch('([nbiIsS])([^nbiIsS]+)') do
if k == 'b' then o[#o+1]=ejaVmHex2Byte(h.endian,v,1) end
if k == 'n' then o[#o+1]=ejaVmHex2Byte(h.endian,v,h.num) end
if k == 'i' then o[#o+1]=ejaVmHex2Byte(h.endian,v,h.int) end
if k == 'I' then o[#o+1]=ejaVmHex2Byte(h.endian,v,h.Instr) end
if k == 's' then o[#o+1]=ejaVmHex2Byte(h.endian,v,h.size) end
if k == 'S' then
for c in v:gmatch('..') do
o[#o+1]=string.char(tonumber(c,16))
end
end
end
return table.concat(o)
else
return nil
end
end
function ejaVmFileExport(file)
local f=file or eja.opt.export or nil
if f then
local data=ejaFileRead(f)
if f:sub(-4) == '.lua' then f=f:sub(1,-5) end
if data and data:sub(1,5) ~= 'ejaVM' then
if data:sub(1,4) == string.char(27,76,117,97) then
data=ejaVmExport(data)
else
data=ejaVmExport(string.dump(loadstring(data)))
end
ejaFileWrite(f..'.eja',data)
end
end
end
function ejaVmFileLoad(f)
local data=ejaFileRead(f)
if data then
if data:sub(1,5) == 'ejaVM' then
data=ejaVmImport(data)
end
end
local ejaScriptRun=assert(loadstring(data))
if ejaScriptRun then ejaScriptRun() end
end
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