def main(infile_path: str, outfile_path: str):
print(infile_path)
vm_files = [path for path in glob.glob(infile_path + "/*.vm")]
code_writer = CodeWriter(filepath=outfile_path)
code_writer.write_init()
for filepath in vm_files:
print(filepath)
parser = Parser(filepath=filepath)
code_writer.set_file_path(filepath)
while parser.hasMoreCommands():
cmd = parser.commandType()
if cmd == C_ARITHMETIC:
code_writer.writeArithmetic(parser.arithmetic())
elif cmd == C_PUSH or cmd == C_POP:
code_writer.writePushPop(cmd,
parser.arg1(),
index=int(parser.arg2()))
elif cmd == C_LABEL:
code_writer.writeLabel(parser.arg1())
elif cmd == C_GOTO:
code_writer.writeGoto(parser.arg1())
elif cmd == C_IF:
code_writer.writeIf(parser.arg1())
elif cmd == C_FUNCTION:
code_writer.writeFunction(parser.arg1(), parser.arg2())
elif cmd == C_RETURN:
code_writer.writeReturn()
elif cmd == C_CALL:
code_writer.writeCall(parser.arg1(), parser.arg2())
parser.advance()
code_writer.close()
def main():
'''Main entry point for the script.'''
# For each .vm file, create a parser object
filetrue = os.path.isfile(sys.argv[1])
dirtrue = os.path.isdir(sys.argv[1])
vmfiles = []
# Rename directory as a ".asm" file for later use
finame = os.path.basename(os.path.normpath(sys.argv[1])) + ".asm"
# Get file path with .asm file appended
dirname = os.path.join(sys.argv[1], finame)
# Create list of files to convert and add to asm file
if dirtrue:
cw = CodeWriter(dirname)
fi = os.listdir(sys.argv[1])
for names in fi:
if names.endswith(".vm"):
vmfiles.append(sys.argv[1] + names)
elif filetrue:
di = sys.argv[1]
if di.endswith(".vm"):
vmfiles.append(di)
tr = vmfiles[0]
trs = tr.replace("vm", "asm")
cw = CodeWriter(trs)
else:
print "invalid filetype: only input .vm files"
else:
print "usage: 'python <file.vm> or <dirname/>'"
out = cw.constructor()
cw.writeInit(out)
with out as outfile:
for files in vmfiles:
# Create new instance of class Parser()
p = cw.setFileName(files)
with p.constructor() as infile:
for line in infile:
if p.commandType(line) == "comments":
pass
elif p.commandType(line) == "C_ARITHMETIC":
cw.writeArithmetic(outfile, p.args(line)[0])
elif p.commandType(line) == "C_IF":
# Handle if-goto command
cw.writeIf(outfile, p.args(line)[1])
elif p.commandType(line) == "C_GOTO":
# Handle goto command
cw.writeGoto(outfile, p.args(line)[1])
elif p.commandType(line) == "C_RETURN":
# Return function result
cw.writeReturn(outfile)
elif p.commandType(line) == "C_LABEL":
# Set label address
cw.writeLabel(outfile, p.args(line)[1])
elif p.commandType(line) == "C_CALL":
# Handle function calls
cw.writeCall(outfile, p.args(line)[1], p.args(line)[2])
elif p.commandType(line) == "C_FUNCTION":
cw.writeFunction(outfile,
p.args(line)[1],
p.args(line)[2])
elif p.commandType(line) == "C_PUSH" or "C_POP":
cw.writePushPop(outfile, p.commandType(line),
p.args(line)[1],
p.args(line)[2])
class jackVisitor(jackGrammarVisitor):
"""Clase que hereda del visitor para ir escribiendo en lenguaje de maquina virtual"""
def __init__(self):
"""Inciializa una tabald e simbolos y un ecritor de codigo junto con variables auxiliares"""
self.symbolTable = SymbolTable()
self.contWhile = -1
self.contIf = -1
self.nombreClase = ""
self.kindMetodo = ""
self.nombreMetodo = ""
self.vmWriter = CodeWriter()
self.vmWriter.vm = ""
self.nArgs = 0
def visitClasses(self, ctx):
"""Obtiene y guarda el nombre de la clase actualmente compilada"""
self.nombreClase = ctx.children[1].children[0].getText()
return self.visitChildren(ctx)
def visitClassVarDec(self, ctx):
"""Guarda en la tabla de simbolos cada uno de los fields variables taticas declaradas """
kind = ctx.children[0].getText()
tipo = ctx.children[1].children[0].getText()
i = 2
while ctx.children[i].getText() != ';':
name = ctx.children[i].getText()
if name == ',':
pass
else:
self.symbolTable.define(name, tipo, kind)
i +=1
return self.visitChildren(ctx)
def visitTypes(self, ctx):
return self.visitChildren(ctx)
def visitSubroutineDec(self, ctx):
"""Inicializa en la tabla de simbolos una subrotina, y en caso de se un metodo agrega this como parametro"""
self.kindMetodo = ctx.children[0].getText()
self.nombreMetodo = ctx.children[2].children[0].getText()
self.symbolTable.startSubroutine()
if self.kindMetodo == 'method':
self.symbolTable.define('this', self.nombreMetodo, 'argument')
return self.visitChildren(ctx)
def visitParameterList(self, ctx):
"""Agrega a la tabla de simbolos de la subroutina cada uno de los parametros """
if ctx.getChildCount() > 0:
tipo = ctx.children[0].children[0].getText()
nombre = ctx.children[1].children[0].getText()
self.symbolTable.define(nombre, tipo, 'argument')
i = 2
while i < len(ctx.children)-1 and ctx.children[i].getText() != ')':
tipo = ctx.children[i+1].getText()
nombre = ctx.children[i+2].getText()
self.symbolTable.define(nombre, tipo, 'argument')
i+=3
return self.visitChildren(ctx)
def visitSubroutineBody(self, ctx):
"""Despues de contar las variables locales escribe la funcion en
maquina virtual y dependiendo del tipo de funcion hace los llamados, push y pop correspondientes"""
i = 1
while ctx.children[i].children[0].getText() == "var":
self.visit(ctx.children[i])
i += 1
funcion = self.nombreClase +'.'+ self.nombreMetodo
numLcl = self.symbolTable.varCount('local')
self.vmWriter.writeFunction(funcion, numLcl)
if self.kindMetodo == 'constructor':
numFields = self.symbolTable.varCount('field')
self.vmWriter.writePush('constant', numFields)
self.vmWriter.writeCall('Memory.alloc', 1)
self.vmWriter.writePop('pointer', 0)
elif self.kindMetodo == 'method':
self.vmWriter.writePush('argument', 0)
self.vmWriter.writePop('pointer', 0)
while i < ctx.getChildCount():
self.visit(ctx.children[i])
i += 1
def visitVarDec(self, ctx):
"""Inicializa en la tabla de simbolos todas las variables locales de la subrutina para poder escribir la función"""
tipo = ctx.children[1].children[0].getText()
nombre = ctx.children[2].getText()
self.symbolTable.define(nombre, tipo, 'local')
i = 3
while ctx.children[i].getText() != ';':
nombre = ctx.children[i].getText()
if nombre == ',':
pass
else:
self.symbolTable.define(nombre, tipo, 'local')
i += 1
return self.visitChildren(ctx)
"""Llamados en los que no es necesario escribir codigo de VM"""
def visitClassName(self, ctx):
return self.visitChildren(ctx)
def visitSubroutineName(self, ctx):
return self.visitChildren(ctx)
def visitVarName(self, ctx):
return self.visitChildren(ctx)
def visitStatements(self, ctx):
return self.visitChildren(ctx)
def visitStatement(self, ctx):
return self.visitChildren(ctx)
def visitLetStatement(self, ctx):
"""Realiza los push y pop necesarios para guardar un valor y asignarle una posiicon en memoria"""
nombre = ctx.children[1].getText()
tipo = self.symbolTable.kindOf(nombre)
index = self.symbolTable.indexOf(nombre)
if tipo == None:
tipo = self.symbolTable.kindOf(nombre)
index = self.symbolTable.indexOf(nombre)
if ctx.children[2].getText() == '[':
self.visit(ctx.children[3])
self.vmWriter.writePush(tipo,index)
self.vmWriter.writeArithmetic('add')
self.visit(ctx.children[6])
self.vmWriter.writePop('temp', 0)
self.vmWriter.writePop('pointer', 1)
self.vmWriter.writePush('temp', 0)
self.vmWriter.writePop('that', 0)
else:
self.visit(ctx.children[3])
self.vmWriter.writePop(tipo,index)
def visitIfStatement(self, ctx):
"""Escribe los labels necesarios para manejar el flujo del programa de a cuerdo a lo indicado por la expresión"""
self.contIf += 1
cont = self.contIf
self.visit(ctx.children[2])
self.vmWriter.writeIf('IF_TRUE' + str(cont))
self.vmWriter.writeGoto('IF_FALSE' + str(cont))
self.vmWriter.writeLabel('IF_TRUE' + str(cont))
self.visit(ctx.children[5])
if ctx.getChildCount() > 7 :
if str(ctx.children[7]) == 'else':
self.vmWriter.writeGoto('IF_END' + str(cont))
self.vmWriter.writeLabel('IF_FALSE' + str(cont))
self.visit(ctx.children[9])
self.vmWriter.writeLabel('IF_END' + str(cont))
else:
self.vmWriter.writeLabel('IF_FALSE' + str(cont))
def visitWhileStatement(self, ctx):
"""Similar al if, escribe labels para que el flujo del programa se repita hasta que una condicion no se cumpla"""
self.contWhile += 1
contW = self.contWhile
self.vmWriter.writeLabel('WHILE_EXP' + str(contW))
self.visit(ctx.children[2])
self.vmWriter.writeArithmetic('not')
self.vmWriter.writeIf('WHILE_END' + str(contW))
self.visit(ctx.children[5])
self.vmWriter.writeGoto('WHILE_EXP' + str(contW))
self.vmWriter.writeLabel('WHILE_END' + str(contW))
def visitDoStatement(self, ctx):
"""Hago el llamado y posteriormente vuelvo a la función de donde hice el llamado"""
self.visitChildren(ctx)
self.vmWriter.writePop('temp', 0)
def visitReturnStatement(self, ctx):
"""Obtengo valor de retorno, si no hay, el valor de retorno es 0"""
if ctx.children[1].getText() != ';':
self.visit(ctx.children[1])
else:
self.vmWriter.writePush('constant', 0)
self.vmWriter.writeReturn()
def visitExpression(self, ctx):
"""Separo al expresion por partes para irla compilando"""
self.visit(ctx.children[0])
i = 2
while i < ctx.getChildCount():
self.visit(ctx.children[i])
self.visit(ctx.children[i-1])
i +=2
def visitTerm(self, ctx):
"""Determino el tipo de termino,si es un tipo de dato o un valor de un arreglo, dependiendo de esto obtengo
su valor si está en la tabla de simbolos o lo busco en un arreglo o busco el siguiente etrmino con el que opera y lo guardo en memoria"""
term = ctx.children[0].getText()
if ctx.getChildCount() == 1:
if term.isdigit():
self.vmWriter.writePush('constant', term)
elif term.startswith('"'):
term = term.strip('"')
tam = len(term)
self.vmWriter.writePush('constant', tam)
self.vmWriter.writeCall('String.new', 1)
for char in term:
self.vmWriter.writePush('constant', ord(char))
self.vmWriter.writeCall('String.appendChar', 2)
elif term in ['true', 'false', 'null', 'this']:
self.visitChildren(ctx)
elif term in self.symbolTable.subrutina.keys():
tipo = self.symbolTable.kindOf(term)
index = self.symbolTable.indexOf(term)
self.vmWriter.writePush(tipo,index)
elif term in self.symbolTable.clase.keys():
tipo = self.symbolTable.kindOf(term)
index = self.symbolTable.indexOf(term)
self.vmWriter.writePush(tipo,index)
else:
self.visitChildren(ctx)
else:
var = ctx.children[0].getText()
if ctx.children[1].getText() == '[':
index = self.symbolTable.indexOf(var)
segment = self.symbolTable.kindOf(var)
self.visit(ctx.children[2])
self.vmWriter.writePush(segment, index)
self.vmWriter.writeArithmetic('add')
self.vmWriter.writePop('pointer', '1')
self.vmWriter.writePush('that', '0')
elif term == '(':
self.visitChildren(ctx)
elif term == '-':
self.visit(ctx.children[1])
self.visit(ctx.children[0])
elif term == '~':
self.visit(ctx.children[1])
self.visit(ctx.children[0])
def visitSubroutineCall(self, ctx):
"""Ubica la subrutina de acuerdo a la clase en la que se encuentre y escribe en VM el respectivo llamado con su paso de parametros"""
nombre = ctx.children[0].children[0].getText()
funcion = nombre
args = 0
if ctx.children[1].getText() == '.':
nombreSubrutina = ctx.children[2].children[0].getText()
tipo = self.symbolTable.typeOf(nombre)
if tipo != None:
kind = self.symbolTable.kindOf(nombre)
index = self.symbolTable.indexOf(nombre)
self.vmWriter.writePush(kind, index)
funcion = tipo + '.' + nombreSubrutina
args += 1
else:
funcion = nombre + '.' + nombreSubrutina
elif ctx.children[1].getText() == '(':
funcion = self.nombreClase + '.' + nombre
args += 1
self.vmWriter.writePush('pointer', 0)
self.visitChildren(ctx)
args = args +self.nArgs
self.vmWriter.writeCall(funcion, args)
def visitExpressionList(self, ctx):
"""Evalua cada expresion indivudualmente"""
self.nArgs = 0
if ctx.getChildCount() > 0:
self.nArgs = 1
self.visit(ctx.children[0])
i = 2
while i < ctx.getChildCount():
self.visit(ctx.children[i])
self.visit(ctx.children[i-1])
self.nArgs += 1
i += 2
def visitOp(self, ctx):
"""Genera el comando de VM respectivo dependiendo del operador"""
op = ctx.children[0].getText()
if op == "+":
self.vmWriter.writeArithmetic('add')
elif op == "-":
self.vmWriter.writeArithmetic('sub')
elif op == "*":
self.vmWriter.writeArithmetic('call Math.multiply 2')
elif op == "/":
self.vmWriter.writeArithmetic('call Math.divide 2')
elif op == "&":
self.vmWriter.writeArithmetic('and')
elif op == "|":
self.vmWriter.writeArithmetic('or')
elif op == ">":
self.vmWriter.writeArithmetic('gt')
elif op == "<":
self.vmWriter.writeArithmetic('lt')
elif op == "=":
self.vmWriter.writeArithmetic('eq')
return self.visitChildren(ctx)
def visitUnaryop(self, ctx):
"""Determina el comando de VM para cada operaodr unario"""
op = ctx.children[0].getText()
if op == "~":
self.vmWriter.writeArithmetic('not')
elif op == "-":
self.vmWriter.writeArithmetic('neg')
def visitKeywordconstant(self, ctx):
"""Escribe el comando de VM para poder hacer uso de una palabra reservada espcifica"""
keyword = ctx.children[0].getText()
if keyword == 'this':
self.vmWriter.writePush('pointer', 0)
elif keyword in ['false','null']:
self.vmWriter.writePush('constant', 0)
elif keyword == 'true':
self.vmWriter.writePush('constant', 0)
self.vmWriter.writeArithmetic('not')
return self.visitChildren(ctx)
def crearArchivo(self,path):
"""Abre el archivo .vm donde se escribirán lso comandos de máquina virtual"""
filewrite = path.split('.jack') #Reemplazo el .jack con .xml si lo tiene
filewritef = filewrite[0]+'.vm' #Sino le agrego el .
codigoVM = self.vmWriter.vm
archivo = filewritef
try:
file = open(archivo,'w') #Abro el file en modo escribir
except FileNotFoundError:
print('ERROR:No hay directorio existente para escribir')
exit(1)
file.write(codigoVM)
class CodeWriterTest(unittest.TestCase):
def setUp(self):
self.tmpdir = TemporaryDirectory()
os.chdir(self.tmpdir.name)
self.assembly_filename = 'test_output'
self.code_writer = CodeWriter(self.assembly_filename)
self.maxDiff = None
def __del__(self):
self.tmpdir.cleanup()
def test_add(self):
self.code_writer.writeArithmetic('add')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'D=M',
'@SP',
'M=M-1',
'A=M',
'D=D+M',
'M=D',
'@SP',
'M=M+1'
])
def test_sub(self):
self.code_writer.writeArithmetic('sub')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'D=M',
'@SP',
'M=M-1',
'A=M',
'D=M-D',
'M=D',
'@SP',
'M=M+1'
])
def test_neq(self):
self.code_writer.writeArithmetic('neg')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'M=-M',
'@SP',
'M=M+1'
])
def test_and(self):
self.code_writer.writeArithmetic('and')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'D=M',
'@SP',
'M=M-1',
'A=M',
'M=M&D',
'@SP',
'M=M+1'
])
def test_or(self):
self.code_writer.writeArithmetic('or')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'D=M',
'@SP',
'M=M-1',
'A=M',
'M=M|D',
'@SP',
'M=M+1'
])
def test_not(self):
self.code_writer.writeArithmetic('not')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'M=!M',
'@SP',
'M=M+1'
])
def test_eq(self):
self.code_writer.writeArithmetic('eq')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'D=M',
'@SP',
'M=M-1',
'A=M',
'D=D-M',
'@test_output.1',
'D;JEQ',
'@test_output.0',
'0;JMP',
'(test_output.1)',
'@SP',
'A=M',
'M=-1',
'@test_output.2',
'0;JMP',
'(test_output.0)',
'@SP',
'A=M',
'M=0',
'@test_output.2',
'0;JMP',
'(test_output.2)',
'@SP',
'M=M+1'
])
def test_lt(self):
self.code_writer.writeArithmetic('lt')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'D=M',
'@SP',
'M=M-1',
'A=M',
'D=M-D',
'@test_output.1',
'D;JLT',
'@test_output.0',
'0;JMP',
'(test_output.1)',
'@SP',
'A=M',
'M=-1',
'@test_output.2',
'0;JMP',
'(test_output.0)',
'@SP',
'A=M',
'M=0',
'@test_output.2',
'0;JMP',
'(test_output.2)',
'@SP',
'M=M+1'
])
def test_gt(self):
self.code_writer.writeArithmetic('gt')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'D=M',
'@SP',
'M=M-1',
'A=M',
'D=D-M',
'@test_output.1',
'D;JLT',
'@test_output.0',
'0;JMP',
'(test_output.1)',
'@SP',
'A=M',
'M=-1',
'@test_output.2',
'0;JMP',
'(test_output.0)',
'@SP',
'A=M',
'M=0',
'@test_output.2',
'0;JMP',
'(test_output.2)',
'@SP',
'M=M+1'
])
def test_write_push_pop_ignores_trailing_comments(self):
self.code_writer.writePushPop('push constant 37 // this is a comment')
self.assertGeneratedAssemblyEqual([
'@37',
'D=A',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1'
])
def test_push_constant(self):
self.code_writer.writePushPop('push constant 37')
self.assertGeneratedAssemblyEqual([
'@37',
'D=A',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1'
])
def test_push_static(self):
self.code_writer.writePushPop('push static 37')
self.assertGeneratedAssemblyEqual([
'@test_output.37',
'D=M',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1'
])
def test_push_argument(self):
self.code_writer.writePushPop('push argument 800')
self.assertGeneratedAssemblyEqual([
'@ARG',
'D=M',
'@800',
'D=A+D',
'A=D',
'D=M',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1'
])
def test_push_temp(self):
self.code_writer.writePushPop('push temp 876')
self.assertGeneratedAssemblyEqual([
'@5',
'D=A',
'@876',
'D=A+D',
'A=D',
'D=M',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1'
])
def test_push_pointer_0(self):
self.code_writer.writePushPop('push pointer 0')
self.assertGeneratedAssemblyEqual([
'@THIS',
'D=M',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1'
])
def test_push_pointer_1(self):
self.code_writer.writePushPop('push pointer 1')
self.assertGeneratedAssemblyEqual([
'@THAT',
'D=M',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1'
])
def test_pop_static(self):
self.code_writer.writePushPop('pop static 37')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'D=M',
'@test_output.37',
'M=D'
])
def test_pop_argument(self):
self.code_writer.writePushPop('pop argument 800')
self.assertGeneratedAssemblyEqual([
'@ARG',
'D=M',
'@800',
'D=A+D',
'@R13',
'M=D',
'@SP',
'M=M-1',
'A=M',
'D=M',
'@R13',
'A=M',
'M=D'
])
def test_pop_temp(self):
self.code_writer.writePushPop('pop temp 876')
self.assertGeneratedAssemblyEqual([
'@5',
'D=A',
'@876',
'D=A+D',
'@R13',
'M=D',
'@SP',
'M=M-1',
'A=M',
'D=M',
'@R13',
'A=M',
'M=D'
])
def test_pop_pointer_0(self):
self.code_writer.writePushPop('pop pointer 0')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'D=M',
'@THIS',
'M=D'
])
def test_pop_pointer_1(self):
self.code_writer.writePushPop('pop pointer 1')
self.assertGeneratedAssemblyEqual([
'@SP',
'M=M-1',
'A=M',
'D=M',
'@THAT',
'M=D'
])
def test_write_function(self):
self.code_writer.writeFunction('function SimpleFunction.test 2')
self.assertGeneratedAssemblyEqual([
'(test_output.SimpleFunction.test)',
'@SP',
'D=M',
'A=D',
'M=0',
'@SP',
'M=M+1',
'@SP',
'D=M',
'A=D',
'M=0',
'@SP',
'M=M+1'
])
def test_write_return(self):
self.code_writer.writeReturn()
self.assertGeneratedAssemblyEqual([
'@LCL',
'D=M',
'@R13',
'M=D',
'D=D-1',
'D=D-1',
'D=D-1',
'D=D-1',
'D=D-1',
'A=D',
'D=M',
'@R14',
'M=D',
'@SP',
'M=M-1',
'A=M',
'D=M',
'@ARG',
'A=M',
'M=D',
'@ARG',
'D=M+1',
'@SP',
'M=D',
'@R13',
'M=M-1',
'A=M',
'D=M',
'@THAT',
'M=D',
'@R13',
'M=M-1',
'A=M',
'D=M',
'@THIS',
'M=D',
'@R13',
'M=M-1',
'A=M',
'D=M',
'@ARG',
'M=D',
'@R13',
'M=M-1',
'A=M',
'D=M',
'@LCL',
'M=D',
'@R14',
'A=M',
'0;JMP'
])
def test_write_call(self):
self.code_writer.writeCall('call Sys.init 0')
self.assertGeneratedAssemblyEqual([
'@test_output.Sys.init.return',
'D=A',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1',
'@LCL',
'D=M',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1',
'@ARG',
'D=M',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1',
'@THIS',
'D=M',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1',
'@THAT',
'D=M',
'@SP',
'A=M',
'M=D',
'@SP',
'M=M+1',
'@SP',
'D=M',
'D=D-1',
'D=D-1',
'D=D-1',
'D=D-1',
'D=D-1',
'@ARG',
'M=D',
'@SP',
'D=M',
'@LCL',
'M=D',
'@test_output.Sys.init',
'0;JMP',
'@9999',
'(test_output.Sys.init.return)'
])
def test_write_bootstrap(self):
self.code_writer.writeBootstrap()
self.assertGeneratedAssemblyEqual([
'@256',
'D=A',
'@SP',
'M=D'
])
def assertGeneratedAssemblyEqual(self, assembly=[]):
self.assertAssemblyEqual(self.assembly_filename, assembly)
def assertAssemblyEqual(self, file_name, assembly=[]):
with open(file_name, 'r') as f:
self.assertEqual([x.rstrip() for x in f.readlines()], assembly)
def main(path):
"""Entry point for the vm translator."""
vm_files_paths = get_vm_files(path)
if not os.path.exists(path):
print("invalid file path")
sys.exit(1)
if os.path.isdir(path):
dirname = os.path.dirname(path)
name = os.path.basename(dirname)
path = f"{dirname}/{name}"
isdir = True
else:
path = os.path.splitext(path)[0]
isdir = False
# Create single code write module
code_writer = CodeWriter(f"{path}.asm")
if isdir:
code_writer.writeInit()
for vm_file_path in vm_files_paths:
filestream = open(vm_file_path, "r")
parser = Parser(filestream)
filestream.close()
# write to assembly file
code_writer.setFileName(os.path.basename(vm_file_path))
while parser.hasMoreCommands():
parser.advance()
command_type = parser.commandType()
if (command_type == CommandType.C_PUSH or
command_type == CommandType.C_POP):
segment = parser.arg1()
index = parser.arg2()
code_writer.writePushPop(
command_type,
segment,
int(index)
)
elif command_type == CommandType.C_ARITHMETIC:
command = parser.arg1()
code_writer.writeArithmetic(command)
elif command_type == CommandType.C_LABEL:
label = parser.arg1()
code_writer.writeLabel(label)
elif command_type == CommandType.C_GOTO:
label = parser.arg1()
code_writer.writeGoto(label)
elif command_type == CommandType.C_IF:
label = parser.arg1()
code_writer.writeIf(label)
elif command_type == CommandType.C_FUNCTION:
label = parser.arg1()
number_of_locals = int(parser.arg2())
code_writer.writeFunction(label, number_of_locals)
elif command_type == CommandType.C_RETURN:
code_writer.writeReturn()
elif command_type == CommandType.C_CALL:
functioname = parser.arg1()
number_of_args = int(parser.arg2())
code_writer.writeCall(functioname, number_of_args)
print(code_writer.filestream.get_global_counter())
code_writer.close()