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Lior Spach
pascal-compiler
Commits
e6edbfbe
Commit
e6edbfbe
authored
10 years ago
by
Lior Spach
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parent
1449166d
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src/main/scala/Tudo.scala
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src/main/scala/Tudo.scala
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e6edbfbe
package
other
import
scala.annotation.tailrec
object
Tudo
{
import
collection.mutable.ListBuffer
val
MEPA
=
ListBuffer
[
String
]()
object
rotulos
{
private
var
num
=
0
def
--
=
num
-=
1
def
geraRotulo
=
{
num
+=
1
"R"
+
(
if
(
num
<
10
)
"00"
+
num
else
if
(
num
<
100
)
"0"
+
num
else
num
)
}
}
def
insereIntVars
(
vars
:
List
[
String
],
nivelLexico
:
Int
)
=
{
val
orgSize
=
vars
.
size
var
desloc
=
0
if
(
orgSize
==
vars
.
distinct
.
size
)
{
TabelaSimb
insere
vars
.
map
{
id
=>
val
v
=
Var
(
id
,
desloc
,
nivelLexico
);
desloc
+=
1
;
v
}
MEPA
+=
"AMEM "
+
orgSize
}
else
{
println
(
"Erro: declaração de variáveis: identificadores já declarados: "
+
vars
.
diff
(
vars
.
distinct
).
mkString
(
" "
))
}
}
def
chamaId
(
id
:
String
,
nvLexAtual
:
Int
)
:
Unit
=
{
TabelaSimb
.
getById
(
id
)
match
{
case
Some
(
it
)
=>
it
match
{
case
v
:
Var
=>
if
(
MyParser
.
eh_param
)
{
val
isByRef
=
MyParser
.
procStack
.
top
match
{
case
p
:
Procedimento
=>
p
.
paramInfo
(
MyParser
.
paramCounter
.
get
).
byRef
case
f
:
Funcao
=>
f
.
paramInfo
(
MyParser
.
paramCounter
.
get
).
byRef
}
if
(
isByRef
)
aplica
(
"CREN "
+
v
.
nvLex
+
","
+
v
.
desloc
)
else
aplica
(
"CRVL "
+
v
.
nvLex
+
","
+
v
.
desloc
)
}
else
aplica
(
"CRVL "
+
v
.
nvLex
+
","
+
v
.
desloc
)
case
p
:
Param
=>
if
(
MyParser
.
eh_param
)
{
val
isByRef
=
MyParser
.
procStack
.
top
match
{
case
p
:
Procedimento
=>
p
.
paramInfo
(
MyParser
.
paramCounter
.
get
).
byRef
case
f
:
Funcao
=>
f
.
paramInfo
(
MyParser
.
paramCounter
.
get
).
byRef
}
if
(
isByRef
)
if
(
p
.
byRef
)
aplica
(
"CRVL "
+
p
.
nvLex
+
","
+
p
.
desloc
)
else
aplica
(
"CREN "
+
p
.
nvLex
+
","
+
p
.
desloc
)
else
if
(
p
.
byRef
)
aplica
(
"CRVI "
+
p
.
nvLex
+
","
+
p
.
desloc
)
else
aplica
(
"CRVL "
+
p
.
nvLex
+
","
+
p
.
desloc
)
}
else
if
(
p
.
byRef
)
aplica
(
"CRVI "
+
p
.
nvLex
+
","
+
p
.
desloc
)
else
aplica
(
"CRVL "
+
p
.
nvLex
+
","
+
p
.
desloc
)
case
p
:
Procedimento
=>
aplica
(
"CHPR "
+
p
.
rotEntrada
+
","
+
nvLexAtual
)
case
f
:
Funcao
=>
aplica
(
"CHPR "
+
f
.
rotEntrada
+
","
+
nvLexAtual
)
case
other
=>
println
(
"Erro(1): Identificador Inválido: "
+
id
)
sys
.
exit
(
1
)
}
case
None
=>
if
(
id
!=
"read"
&&
id
!=
"write"
)
{
println
(
"Erro(2): Identificador Inválido: "
+
id
);
sys
.
exit
(
1
)
}
else
id
match
{
case
"read"
=>
aplica
(
"LEIT"
)
case
"write"
=>
aplica
(
"IMPR"
)
}
}
}
object
proc
{
val
RotStack
=
collection
.
mutable
.
Stack
[
String
]()
//DRY!
def
entraProcFun
(
nivelLexico
:
Int
)
=
{
val
rotulo
=
rotulos
.
geraRotulo
//rotuloEntrada
val
rotuloBegin
=
rotulos
.
geraRotulo
RotStack
.
push
(
rotuloBegin
)
//Begin
if
(
nivelLexico
>
1
)
{
val
rotDesvio
=
TabelaSimb
.
getLastProc
(
nivelLexico
-
1
)
match
{
case
p
:
Procedimento
=>
p
.
rotEntrada
case
f
:
Funcao
=>
f
.
rotEntrada
case
o
=>
println
(
"====> "
+
o
)
}
}
aplica
(
rotulo
+
": ENPR "
+
nivelLexico
)
rotulo
}
def
entraProc
(
id
:
String
,
params
:
Option
[
List
[(
Option
[
String
]
,
List
[
String
])]
],
nivelLexico
:
Int
)
:
Unit
=
{
val
rotulo
=
entraProcFun
(
nivelLexico
)
params
match
{
case
Some
(
lstParams
)
if
!
lstParams
.
isEmpty
=>
val
ps
=
retornaParamsLst
(
lstParams
,
nivelLexico
)
TabelaSimb
.
insere
(
Procedimento
(
id
,
ps
,
nivelLexico
,
rotulo
)
)
ps
.
foreach
{
TabelaSimb
.
insere
}
case
None
=>
TabelaSimb
.
insere
(
Procedimento
(
id
,
List
.
empty
,
nivelLexico
,
rotulo
)
)
}
}
def
entraFunc
(
id
:
String
,
params
:
Option
[
List
[(
Option
[
String
]
,
List
[
String
])]
],
nivelLexico
:
Int
)
:
Unit
=
{
val
rotulo
=
entraProcFun
(
nivelLexico
)
params
match
{
case
Some
(
lstParams
)
if
!
lstParams
.
isEmpty
=>
val
ps
=
retornaParamsLst
(
lstParams
,
nivelLexico
)
val
desloc
=
-
4
-
ps
.
size
TabelaSimb
.
insere
(
Funcao
(
id
,
ps
,
desloc
,
nivelLexico
,
rotulo
)
)
ps
.
foreach
{
TabelaSimb
.
insere
}
case
None
=>
TabelaSimb
.
insere
(
Funcao
(
id
,
null
,
-
4
,
nivelLexico
,
rotulo
)
)
}
}
def
retornaParamsLst
(
params
:
List
[(
Option
[
String
]
,
List
[
String
])],
nivelLexico
:
Int
)
:
List
[
Param
]
=
{
var
desloc
=
-
3
-
params
.
map
(
_
.
_2
.
size
).
sum
params
.
flatMap
{
case
(
varOpt
,
idlst
)
=>
idlst
map
{
id
=>
val
p
=
Param
(
id
,
desloc
,
varOpt
.
isDefined
,
nivelLexico
)
desloc
+=
1
p
}
}
}
@tailrec
def
contaVariaveis
(
nvLex
:
Int
,
count
:
Int
=
0
)
:
Int
=
TabelaSimb
.
hasNext
match
{
case
true
=>
TabelaSimb
.
top
match
{
case
v
:
Var
=>
TabelaSimb
.
drop
;
contaVariaveis
(
nvLex
,
count
+
1
)
case
p
:
Procedimento
=>
if
(
p
.
nvLex
>
nvLex
)
{
TabelaSimb
.
drop
;
contaVariaveis
(
nvLex
,
count
)}
else
count
case
f
:
Funcao
=>
if
(
f
.
nvLex
>
nvLex
)
{
TabelaSimb
.
drop
;
contaVariaveis
(
nvLex
,
count
)}
else
count
case
r
:
Label
=>
if
(!
r
.
used
)
{
println
(
"Warning: rótulo nunca usado: "
+
r
.
id
)}
TabelaSimb
.
drop
contaVariaveis
(
nvLex
,
count
)
case
_
=>
count
}
case
false
=>
count
}
def
saiProcFunc
(
nivelLexico
:
Int
)
{
val
numVariaveis
=
contaVariaveis
(
nivelLexico
)
if
(
numVariaveis
>
0
)
aplica
(
"DMEM "
+
numVariaveis
)
val
table
=
TabelaSimb
.
getTable
TabelaSimb
.
setTable
(
table
.
dropWhile
{
case
p
:
Procedimento
=>
if
(
p
.
nvLex
>
nivelLexico
)
true
else
false
case
f
:
Funcao
=>
if
(
f
.
nvLex
>
nivelLexico
)
true
else
false
case
r
:
Label
=>
if
(
r
.
used
)
{
//Se rótulo nunca usado
println
(
"Warning: rótulo nunca usado: "
+
r
.
id
)
//sys.exit(1)
}
true
case
_
=>
true
}
)
TabelaSimb
.
top
match
{
case
p
:
Procedimento
=>
aplica
(
"RTPR "
+
p
.
nvLex
+
","
+
p
.
paramInfo
.
size
)
case
f
:
Funcao
=>
aplica
(
"RTPR "
+
f
.
nvLex
+
","
+
f
.
paramInfo
.
size
)
case
e
=>
println
(
e
);
println
(
"Nao eh instancia proc nem func-> ERRO"
);
sys
.
exit
(
2
)
}
}
}
//ROTULOS
def
insereRotulos
(
lstRot
:
List
[
String
],
nivelLexico
:
Int
)
=
{
lstRot
.
foreach
{
id
=>
TabelaSimb
insere
(
Label
(
id
,
rotulos
.
geraRotulo
,
nivelLexico
)
)
}
}
def
entraRotulo
(
rotuloLogico
:
String
,
nvLex
:
Int
)
{
val
rot
=
TabelaSimb
.
getById
(
rotuloLogico
)
rot
match
{
case
Some
(
e
)
=>
e
match
{
case
r
:
Label
=>
if
(
r
.
put
)
{
println
(
"Erro: Rotulo "
+
r
.
id
+
" posto mais de uma vez!"
)
sys
.
exit
(
1
)
}
else
{
r
.
put
=
true
//r.used = true goto should do that
aplica
(
r
.
rotulo
+
": ENRT "
+
nvLex
+
","
+
TabelaSimb
.
numVarsLocais
(
nvLex
))
}
case
_
=>
println
(
"Erro: Rótulo "
+
rotuloLogico
+
" não declarado!"
);
sys
.
exit
(
1
)
}
case
None
=>
println
(
"Erro: Rótulo "
+
rotuloLogico
+
" não declarado!"
);
sys
.
exit
(
1
)
}
}
def
iniciaPrograma
{
aplica
(
"INPP"
)
}
def
encerraPrograma
=
{
val
countVars
=
proc
.
contaVariaveis
(
0
)
if
(
countVars
>
0
)
{
aplica
(
"DMEM "
+
countVars
)
}
aplica
(
"PARA"
)
}
def
atribuicao
(
id
:
String
)
=
{
val
e
=
TabelaSimb
.
getById
(
id
)
e
match
{
case
Some
(
e
)
=>
e
match
{
case
f
:
Funcao
=>
aplica
(
"ARMZ "
+
f
.
nvLex
+
","
+
f
.
desloc
)
case
v
:
Var
=>
aplica
(
"ARMZ "
+
v
.
nvLex
+
","
+
v
.
desloc
)
case
p
:
Param
=>
if
(
p
.
byRef
)
aplica
(
"ARMI "
+
p
.
nvLex
+
","
+
p
.
desloc
)
else
aplica
(
"ARMZ "
+
p
.
nvLex
+
","
+
p
.
desloc
)
case
other
=>
println
(
"Atribuição a "
+
id
+
" é inválida!"
);
sys
.
exit
(
1
)
}
case
None
=>
println
(
"identificador inválido: "
+
id
);
sys
.
exit
(
1
)
}
}
def
literal
(
num
:
Int
)
=
{
aplica
(
"CRCT "
+
num
)
}
def
aplica
(
cmdMEPA
:
String
)
{
MEPA
+=
cmdMEPA
}
def
gotoRotulo
(
rot
:
String
,
nivelLexico
:
Int
)
{
val
r
=
TabelaSimb
.
getById
(
rot
)
r
match
{
case
Some
(
s
)
=>
s
match
{
case
r
:
Label
=>
r
.
used
=
true
aplica
(
"DSVR "
+
r
.
rotulo
+
","
+
r
.
nvLex
+
","
+
nivelLexico
)
case
_
=>
println
(
"goto para rótulo não declarado! (goto "
+
rot
+
")"
);
sys
.
exit
(
1
)
}
case
None
=>
println
(
"goto para rótulo não declarado! (goto "
+
rot
+
")"
);
sys
.
exit
(
1
)
}
}
def
reservadas
=
List
(
"program"
,
"label"
,
"var"
,
"procedure"
,
"function"
,
"begin"
,
"end"
,
"if"
,
"then"
,
"else"
,
"while"
,
"do"
,
"or"
,
"and"
,
"div"
,
"not"
)
}
\ No newline at end of file
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