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java
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local lpeg = require("lulpeg")
local tArgs = {...}
fl = shell.resolve(tArgs[1])
local Scopes = { {} }
local Classes = { }
local privVars = { }
local pubVars = { }
local pubScope
local privScope
local assign = pub_assign
local inClass = false
local currentReturn = nil
local inMethod = false
local currentClass = nil
local nFl = {}
for i in string.gmatch(fs.getName(fl), "[^%.]+") do
table.insert(nFl, i)
end
local fWe = nFl[1]
function eval_bool(expr)
local expr1 = eval(expr[2])
local operator = expr[3]
local expr2 = eval(expr[4])
if operator == "==" then
return expr1 == expr2
elseif operator == "!=" then
return expr1 ~= expr2
elseif operator == ">=" then
return expr1 >= expr2
elseif operator == "<=" then
return expr1 <= expr2
elseif operator == "<" then
return expr1 < expr2
elseif operator == ">" then
return expr1 > expr2
end
end
function eval_if(if_ast)
local last_bool
local isElse = false
for i=1, #if_ast do
if isElse == true then
break
end
if if_ast[i] == "if" then
if eval_bool(if_ast[i+1]) then
last_bool = eval_bool(if_ast[i+1])
return eval(if_ast[i+2])
end
elseif if_ast[i][1] == "elseif" then
if last_bool then
elseif eval_bool(if_ast[i][2]) then
last_bool = eval_bool(if_ast[i][2])
return eval(if_ast[i][3])
end
elseif if_ast[i][1] == "else" then
if last_bool then
else
isElse = true
return eval(if_ast[i][2])
end
end
end
end
function eval_expr(expr)
local accum = eval(expr[2])
if type(accum) == "number" then
for i=3, #expr, 2 do
local operaotr = eval(expr[i])
local expr2 = eval(expr[i+1])
if type(expr2) == "number" then
if operator == "+" then
accum = expr1 + expr2
elseif operator == "-" then
accum = expr1 + expr2
elseif operator == "*" then
accum = expr1 * epxr2
elseif operator == "/" then
accum = expr1 / expr2
end
end
end
return accum
end
end
function eval(ast)
if inClass == false then
if ast[1] == "list" then
elseif ast[1] == "class" then
elseif ast[1] == "import" then
elseif ast[1] == "eol" then
else
throw("Java: Expected "..ast[1].." to be in class!")
end
elseif inMethod == false then
if ast[1] == "public" then
elseif ast[1] == "private" then
elseif ast[1] == "void" then
elseif ast[1] == "class" then
elseif ast[1] == "boolean" then
elseif ast[1] == "String" then
elseif ast[1] == "int" then
elseif ast[1] == "string_arr" then
elseif ast[1] == "string_ref" then
elseif ast[1] == "float" then
elseif ast[1] == "list" then
elseif ast[1] == "true" then
elseif ast[1] == "false" then
elseif ast[1] == "null" then
elseif ast[1] == "expr" then
elseif ast[1] == "term" then
elseif ast[1] == "string" then
elseif ast[1] == "eol" then
elseif ast[1] == "classCall" then
else
throw("Java: expected "..ast[1].." to be in Method!")
end
end
if type(ast) == "number" then
return ast
elseif type(ast) == "String" then
return ast
elseif ast[1] == "string_def" then
return eval(ast[2])
elseif ast[1] == "expr" or ast[1] == "term" then
return eval_expr(ast)
elseif ast[1] == "true" then
return true
elseif ast[1] == "false" then
return false
elseif ast[1] == "null" then
return nil
elseif ast[1] == "list" then
local last = nil
for i=2, #ast do
last = eval(ast[i])
end
return last
elseif ast[1] == "class" then
PrivScope = { { } }
PubScope = { { } }
Classes[ast[2]] = { code = ast[3], PrivScope = PrivScope, PubScope = PubScope }
if ast[2] == fWe then
local oIc = inClass
local oCC = currentClass
inClass = true
currentClass = ast[2]
local code = eval(ast[3])
Classes[ast[2]].PrivScope = PrivScope
Classes[ast[2]].PubScope = PubScope
inClass = oIc
currentClass = oCC
return code
end
elseif ast[1] == "classCall" then
if #ast == 2 then
if Classes[ast[2]] then
local oC = currentClass
currentClass = ast[2]
local oPuS = pubScope
local oPrS = privScope
pubScope = Classes[currentClass].pubScope
privScope = Classes[currentClass].privScope
local code = eval(Classes[currentClass].code)
currentClass = oC
pubScope = oPus
privScope = oPrS
end
elseif #ast == 3 then
if Classes[ast[2]] then
local oClass = currentClass
local oPuS = PubScope
local oPrS = PrivScope
currentClass = ast[2]
PubScope = Classes[currentClass].PubScope
PrivScope = Classes[currentClass].PrivScope
eval(Classes[currentClass].code)
if ast[3][1] == "ref" then
local val = pub_lookup(ast[3])
if not val then
throw(ast[3][2].." in class "..currentClass.." does not exists or is privat! :"..oClass..":")
end
currentClass = oClass
PubScope = oPuS
PrivScope = oPrS
return val
elseif ast[3][1] == "call" then
local call = eval(ast[3])
currentClass = oClass
PubScope = oPuS
PrivScope = oPrS
return call
end
end
end
elseif ast[1] == "ref" then
local try = priv_lookup(ast)
if not try then
try = pub_lookup(ast)
end
return try
elseif ast[1] == "void" then
if ast[2][2] == "main" then
local oMeth = inMethod
inMethod = true
local code = eval(ast[4])
inMethod = oMeth
else
return assign(ast[2],
{ args = ast[3],
type = "void",
code = ast[4],
scope = Scopes[#Scopes] })
end
elseif ast[1] == "boolean" then
if #ast == 3 then
local val = eval(ast[3])
if type(val) == "boolean" then
return assign(ast[2], val)
else
throw("Attempt to assign "..type(val).." as boolean", 0)
end
elseif #ast == 4 then
return assign(ast[2],
{
type = "boolean",
args = ast[3],
code = ast[4],
scope = PubScope[#PubScope] })
end
elseif ast[1] == "String" then
if #ast == 3 then
local val = eval(ast[3])
if type(val) == "String" then
return assign(ast[2], val)
elseif type(val) == "table" and val[1] == "String" then
return assign(ast[2], val)
else
throw("Attempt to assign "..type(val).." as String")
end
elseif #ast == 4 then
return assign( ast[2]
{
type = "String",
args = ast[3],
code = ast[4],
scope = PubScope[#pubScope] })
end
elseif ast[1] == "call" then
local oldVal = currentReturn
local method = eval(ast[2])
if not method then
throw("Java: unexpected method: "..ast[2][2])
end
if type(method) ~= "method" then
throw("Java: unexpected method: "..ast[2][2])
end
scope = setmetatable({}, {__index=method.scope})
for i, name in ipairs(method.args) do
local val = eval(ast[3][i])
if type(val) == name[1] then
scope[name[2]] = val
else
throw("Java: "..name[1].." expected, got "..type(val))
end
end
local nMeth = inMethod
inMethod = true
table.insert(PubScope, scope)
local code = eval(method.code)
local reVal = currentReturn
currentReturn = oldVal
table.remove(PubScope)
if method.type == "void" then
inMethod = nMeth
return
else
if type(reVal) == method.type then
inMethod = nMeth
return reVal
else
throw("Java: expected "..method.type.." to return, got "..type(reVal))
end
end
elseif ast[1] == "public" then
local oldAs = assign
assign = pub_assign
local code = eval(ast[2])
assign = oldAs
return code
elseif ast[1] == "private" then
local oldAs = assign
assign = priv_assign
local code = eval(ast[2])
assign = oldAs
return code
elseif ast[1] == "return" then
currentReturn = eval(ast[2])
return currentReturn
elseif ast[1] == "if" then
return eval_if(ast)
elseif ast[1] == "arg" then
elseif ast[1] == "doLua" then
local lCode = eval(ast[2])
if type(lCode) == "String" then
local func, err = loadstring(lCode)
if not err then
func()
else
throw(err)
end
else
throw("String expected for doLua, got"..type(code))
end
elseif ast[1] == "import" then
local package = {}
for i in string.gmatch(ast[2], "[^%.]+") do
table.insert(package, i)
end
if package[1] == "java" then
local pFile = package[#package]
table.remove(package, 1)
local package = table.concat(package, "/")
local file = fs.open(settings.get("rheo.home").."/javaBin/lib/"..package..".java", "r")
if file then
local handle = file.readAll()
file.close()
local oFl = fl
fl = fs.getDir(fl).."/"..pFile..".java"
parser:match(handle)
fl = oFl
else
throw("Could not import package: "..ast[2])
end
else
local pFile = package[#package]
local package = table.concat(package, "/")
local file = fs.open(fs.getDir(fl).."/"..package..".java", "r")
if file then
local handle = file.readAll()
file.close()
local oFl = fl
fl = fs.getDir(fl).."/"..pFile..".java"
parser:match(handle)
fl = oFl
else
throw("Could not import package: "..ast[2])
end
end
elseif ast[1] == "this" then
local priv = PrivScope[#PrivScope]
local pub = PubScope[#PubScope]
if #ast == 1 then
return {"classCall" , ast[2]}
else
if ast[2][1] == "ref" then
return eval(ast[2])
elseif ast[2][1] == "call" then
return eval(ast[2])
end
end
elseif ast[1] == "join" then
local str = {}
for i=1, #ast[2] do
local nStr = eval(ast[2][i][2])
if type(nStr) ~= "String" then
throw("String expected, got "..type(nStr))
end
table.insert(str, nStr)
end
return table.concat(str, jS)
elseif ast[1] == "string_arr" then
local len = tonumber(ast[2][2][2])
if type(len) ~= "number" then
throw("Number expected for length, got "..type(len))
end
local tab = {"String"}
for i=1,len do
table.insert(tab, i)
end
return tab
elseif ast[1] == "eol" then
curLine = curLine+1
else
error("unexpected, "..ast[1][1])
end
end
function pub_assign(ref, value)
local current = PubScope[#PubScope]
for i = 2, #ref do
local next_index = ref[i]
if type(next_index) == "table" then
next_index = eval(next_index)
end
if i == #ref then
while current[next_index] and not rawget(current, next_index) do
current = getmetatable(current).__index
end
current[next_index] = value
return value
else
current = current[next_index]
end
end
end
function priv_assign(ref, value)
local current = PrivScope[#PrivScope]
for i = 2, #ref do
local next_index = ref[i]
if type(next_index) == "table" then
next_index = eval(next_index)
end
if i == #ref then
while current[next_index] and not rawget(current, next_index) do
current = getmetatable(current).__index
end
current[next_index] = value
return value
else
current = current[next_index]
end
end
end
function pub_lookup(ref)
local current = PubScope[#PubScope]
for i = 2, #ref do
local next_index = ref[i]
if type(next_index) == "table" then
next_index = eval(next_index)
end
if current then
current = current[next_index]
else
current = nil
end
end
return current
end
function priv_lookup(ref)
local current = PrivScope[#PrivScope]
for i = 2, #ref do
local next_index = ref[i]
if type(next_index) == "table" then
next_index = eval(next_index)
end
if current then
current = current[next_index]
else
current = nil
end
end
return current
end
local spc = lpeg.S("\t\n ")^0
local digit = lpeg.R("09")
local number = lpeg.C( (lpeg.P("-") + digit) *
digit^0 *
( lpeg.P(".") * digit^0 )^-1 ) / tonumber * spc
local letter = lpeg.R("AZ","az")
local name = lpeg.C( letter*( digit+letter+"_")^0 ) * spc
local packname = lpeg.C( letter*( digit+letter+"."+"_")^0 ) * spc
local lparen = "(" * spc
local rparen = ")" * spc
local lcurly = "{" * spc
local rcurly = "}" * spc
local lbrack = "[" * spc
local rbrack = "]" * spc
local semicolon = ";" * spc
local expr_op = lpeg.C( lpeg.S("+-") ) * spc
local term_op = lpeg.C( lpeg.S("*/") ) * spc
local boolean = lpeg.C( lpeg.S("<>") + "<=" + ">=" + "==" + "!=" ) * spc
local doublequoted_string = lpeg.P('"') * lpeg.C( ( name+"."+" "+"+"+"/"+"!"+"§"+"$"+"%"+"&"+"("+")"+"="+"?"+"`"+"°"+"^"+"*"+"#"+"~"+"´"+"ä"+"ö"+"ü"+"²"+"³"+"{"+"}"+"["+"]"+"'"+":"+";"+","+"-"+"<"+">"+"|"+"µ"+"?"+"@")^0 ) * lpeg.P('"') * spc
local singlequoted_string = lpeg.P("'") * lpeg.C( ( name+"."+" "+"+"+"/"+"!"+"§"+"$"+"%"+"&"+"("+")"+"="+"?"+"`"+"°"+"^"+"*"+"#"+"~"+"´"+"ä"+"ö"+"ü"+"²"+"³"+"{"+"}"+"["+"]"+":"+";"+","+"-"+"\""+"<"+">"+"|"+"µ"+"?"+"@")^0 ) * lpeg.P("'") * spc
local string = singlequoted_string + doublequoted_string
local arg = lpeg.C( lpeg.P("String") + lpeg.P("int") + lpeg.P("boolean") + lpeg.P("float") ) * spc
local keywords = ( lpeg.P("import") + lpeg.P("if") + lpeg.P("else") + lpeg.P("class") + lpeg.P("public") + lpeg.P("String") + lpeg.P("int") + lpeg.P("float") + lpeg.P("boolean") + lpeg.P("private") + lpeg.P("void") + lpeg.P("print") + lpeg.P("true") + lpeg.P("false") + lpeg.P("null") + lpeg.P("doLua") + lpeg.P("this") + lpeg.P("return") + lpeg.P("join") ) * spc
local name = name - keywords
stmt = spc * lpeg.P{
"LIST";
LIST = lpeg.Ct( lpeg.Cc("list") *
( lpeg.V("STMTS") * spc )^0 ),
STMT =
( lpeg.V("CALL") +
lpeg.V("CLASSCALL") +
lpeg.V("IMPORT") +
lpeg.V("THIS") +
lpeg.V("DOLUA") +
lpeg.V("RETURN") ) * semicolon * spc,
STMTS =
lpeg.V("CLASS") +
lpeg.V("VOID") +
lpeg.V("PUBLIC") +
lpeg.V("PRIVATE") +
lpeg.V("BOOLEAN") +
lpeg.V("STRING") +
lpeg.V("IF") +
lpeg.V("STMT"),
REF = lpeg.Ct( lpeg.Cc("ref") * name * ( lbrack * lpeg.V("VAL") * rbrack )^0 ),
EXPR = lpeg.Ct( lpeg.Cc("expr") * lpeg.V("TERM") * ( expr_op * lpeg.V("TERM") )^0 ),
TERM = lpeg.Ct( lpeg.Cc("term") * lpeg.V("FACT") * ( term_op * lpeg.V("FACT") )^0 ),
FACT =
number +
lparen * lpeg.V("EXPR") * rparen +
lpeg.V("REF"),
STRING_DEF = lpeg.Ct( lpeg.Cc("string_def") * string ),
VAL = lpeg.V("CALL") + lpeg.V("CLASSCALL") + lpeg.V("REF") + lpeg.V("EXPR") + lpeg.V("STRING_DEF") + lpeg.V("BOOLS") + lpeg.V("THIS") + lpeg.V("JOIN") + lpeg.V("STRING_ARR"),
IMPORT = lpeg.Ct( lpeg.C("import") * spc * packname ),
PUBLIC = lpeg.Ct( lpeg.C("public") * spc * ( lpeg.V("VOID") + lpeg.V("CONSTRUCTOR") + lpeg.V("BOOLEAN") + lpeg.V("INT") + lpeg.V("STRING") + lpeg.V("FLOAT") ) ),
PRIVATE = lpeg.Ct( lpeg.C("private") * spc * ( lpeg.V("VOID") + lpeg.V("CONSTRUCTOR") + lpeg.V("BOOLEAN") + lpeg.V("INT") + lpeg.V("STRING") + lpeg.V("FLOAT") ) ),
CLASS = lpeg.Ct( lpeg.C("class") * spc * name * spc * lcurly * lpeg.V("LIST") * spc * rcurly ),
VOID = lpeg.Ct( lpeg.C("void") * spc * lpeg.V("REF") * lparen * spc * lpeg.V("NAME_LIST") * spc * rparen * lcurly * lpeg.V("LIST") * spc * rcurly ),
CONSTRUCTOR = lpeg.Ct( lpeg.Cc("constructor") * lpeg.V("REF") * lparen * lpeg.V("NAME_LIST") * spc * rparen * lcurly * lpeg.V("LIST") * spc * rcurly ),
BOOLEAN = lpeg.V("BOOLEAN_ASSIGN") + lpeg.Ct( lpeg.C("boolean") * spc * lpeg.V("REF") * lparen * lpeg.V("NAME_LIST") * spc * rparen * spc * lcurly * spc * lpeg.V("LIST") * spc * rcurly ),
BOOLEAN_ASSIGN = lpeg.Ct( lpeg.C("boolean") * spc * lpeg.V("REF") * spc * "=" * spc * lpeg.V("VAL") * semicolon ),
STRING = lpeg.V("STRING_ASSIGN") + lpeg.Ct( lpeg.C("String") * spc * lpeg.V("REF") * lparen * lpeg.V("NAME_LIST") * spc * rparen * spc * lcurly * lpeg.V("LIST") * spc * rcurly ),
STRING_ASSIGN = lpeg.Ct( lpeg.C("String") * spc * lpeg.V("REF") * spc * "=" * spc * lpeg.V("VAL") * semicolon ),
STRING_ARR = lpeg.Ct( lpeg.Cc("string_arr") * "String" * lbrack * spc * lpeg.V("VAL") * spc * rbrack ),
INT = lpeg.Ct( lpeg.C("int") * spc * lpeg.V("REF") * lparen * lpeg.V("NAME_LIST") * spc * rparen * lcurly * lpeg.V("LIST") * spc * rcurly ),
FLOAT = lpeg.Ct( lpeg.C("float") * spc * lpeg.V("REF") * lparen * lpeg.V("NAME_LIST") * spc * rparen * lcurly * lpeg.V("LIST") * spc * rcurly ),
CALL = lpeg.Ct( lpeg.Cc("call") * lpeg.V("REF") * lparen * lpeg.V("VAL_LIST") * spc * rparen ),
IF = lpeg.Ct( lpeg.C("if") * spc * lparen * spc * lpeg.V("BOOL") * spc * rparen * spc * lcurly * spc * lpeg.V("LIST") * spc * rcurly * spc * ( lpeg.V("ELSE_IF") + lpeg.V("ELSE") )^0 ),
ELSE_IF = lpeg.Ct( lpeg.Cc("elseif") * "else if" * spc * lparen * spc * lpeg.V("BOOL") * spc * rparen * spc * lcurly * spc * lpeg.V("LIST") * spc * rcurly ),
ELSE = lpeg.Ct( lpeg.C("else") * spc * lcurly * spc * lpeg.V("LIST") * spc * rcurly ),
BOOL = lpeg.Ct( lpeg.Cc("bool") * lpeg.V("VAL") * spc * boolean * lpeg.V("VAL") ),
BOOLS = lpeg.V("TRUE") + lpeg.V("FALSE") + lpeg.V("NULL"),
TRUE = lpeg.Ct( lpeg.C("true") ),
FALSE = lpeg.Ct( lpeg.C("false") ),
NULL = lpeg.Ct( lpeg.C("null") ),
RETURN = lpeg.Ct( lpeg.C("return") * spc * lpeg.V("VAL") ),
ARGS = lpeg.Ct( arg * name ),
DOLUA = lpeg.Ct( lpeg.C("doLua") * lparen * spc * lpeg.V("VAL") * spc * rparen ),
THIS = lpeg.Ct( lpeg.C("this") * ( ( "." * ( lpeg.V("CALL") + lpeg.V("REF") ) ) + spc ) ),
CLASSCALL = lpeg.Ct( lpeg.Cc("classCall") * name * ( ( "." * ( lpeg.V("CALL") + lpeg.V("REF") ) ) + spc ) ),
JOIN = lpeg.Ct( lpeg.C("join") * lparen * spc * lpeg.V("VAL_LIST") * spc * rparen ),
VAL_LIST = lpeg.Ct( ( lpeg.V("VAL") * ( "," * spc)^-1 * spc )^0 ),
NAME_LIST = lpeg.Ct( ( lpeg.V("ARGS") * ( "," * spc)^0 )^0 ),
EOL = lpeg.Ct( lpeg.Cc("eol") * "%%#n" )
}
oldType = type
function type(val)
if oldType(val) == "table" then
if val.type and val.args and val.scope and val.code then
return "method"
else
return "table"
end
elseif Classes[val] then
return "class"
elseif oldType(val) == "nil" then
return "null"
elseif oldType(val) == "string" then
return "String"
else
return oldType(val)
end
end
function throw(msg)
error(fl..": "..curLine..": "..msg, 0)
end
parser = stmt / eval
file = io.open(fl, "r")
if file then
curLine = 1
lines = {}
for line in file:lines() do
table.insert(lines, line)
end
file:close()
code = table.concat(lines, " ")
parser:match(code)
else
error(fl.." does not exists!",0)
end