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GenJava.cs
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GenJava.cs
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// GenJava.cs - Java code generator
//
// Copyright (C) 2011-2013 Piotr Fusik
//
// This file is part of CiTo, see http://cito.sourceforge.net
//
// CiTo is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// CiTo is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with CiTo. If not, see http://www.gnu.org/licenses/
using System;
using System.IO;
namespace Foxoft.Ci
{
public class GenJava : SourceGenerator, ICiSymbolVisitor
{
string Namespace;
bool UsesSubstringMethod;
bool UsesClearBytesMethod;
bool UsesClearIntsMethod;
public GenJava(string namespace_)
{
this.Namespace = namespace_;
}
void Write(CiVisibility visibility)
{
switch (visibility) {
case CiVisibility.Dead:
case CiVisibility.Private:
Write("private ");
break;
case CiVisibility.Internal:
break;
case CiVisibility.Public:
Write("public ");
break;
}
}
void CreateJavaFile(CiSymbol symbol)
{
string dir = Path.GetDirectoryName(this.OutputFile);
CreateFile(Path.Combine(dir, symbol.Name + ".java"));
if (this.Namespace != null) {
Write("package ");
Write(this.Namespace);
WriteLine(";");
}
WriteLine();
Write(symbol.Documentation);
Write(symbol.Visibility);
}
void CloseJavaFile()
{
CloseBlock();
CloseFile();
}
void ICiSymbolVisitor.Visit(CiEnum enu)
{
CreateJavaFile(enu);
Write("interface ");
WriteLine(enu.Name);
OpenBlock();
for (int i = 0; i < enu.Values.Length; i++) {
CiEnumValue value = enu.Values[i];
Write(value.Documentation);
Write("int ");
WriteUppercaseWithUnderscores(value.Name);
Write(" = ");
Write(i);
WriteLine(";");
}
CloseJavaFile();
}
void WriteBaseType(CiType type)
{
if (type is CiStringType)
Write("String");
else if (type == CiBoolType.Value)
Write("boolean");
else if (type is CiEnum)
Write("int");
else
Write(type.Name);
}
void Write(CiType type)
{
WriteBaseType(type.BaseType);
for (int i = 0; i < type.ArrayLevel; i++)
Write("[]");
Write(' ');
}
bool WriteInit(CiType type)
{
if (type is CiClassStorageType || type is CiArrayStorageType) {
Write(" = ");
WriteNew(type);
return true;
}
return false;
}
void ICiSymbolVisitor.Visit(CiField field)
{
Write(field.Documentation);
Write(field.Visibility);
if (field.Type is CiClassStorageType || field.Type is CiArrayStorageType)
Write("final ");
Write(field.Type);
WriteCamelCase(field.Name);
WriteInit(field.Type);
WriteLine(";");
}
void ICiSymbolVisitor.Visit(CiConst konst)
{
if (konst.Visibility != CiVisibility.Public)
return;
Write(konst.Documentation);
Write("public static final ");
Write(konst.Type);
WriteUppercaseWithUnderscores(konst.Name);
Write(" = ");
WriteConst(konst.Value);
WriteLine(";");
}
protected override void WriteConst(object value)
{
if (value is byte)
Write((sbyte) (byte) value);
else if (value is CiEnumValue) {
CiEnumValue ev = (CiEnumValue) value;
Write(ev.Type.Name);
Write('.');
WriteUppercaseWithUnderscores(ev.Name);
}
else
base.WriteConst(value);
}
protected override void WriteName(CiConst konst)
{
WriteUppercaseWithUnderscores(konst.GlobalName);
}
protected override CiPriority GetPriority(CiExpr expr)
{
CiPropertyAccess pa = expr as CiPropertyAccess;
if (pa != null) {
if (pa.Property == CiLibrary.SByteProperty)
return GetPriority(pa.Obj);
if (pa.Property == CiLibrary.LowByteProperty)
return CiPriority.Prefix;
}
else if (expr is CiCoercion) {
CiCoercion c = (CiCoercion) expr;
if (c.ResultType == CiByteType.Value && c.Inner.Type == CiIntType.Value)
return CiPriority.Prefix;
if (c.ResultType == CiIntType.Value && c.Inner.Type == CiByteType.Value)
return CiPriority.And;
}
return base.GetPriority(expr);
}
protected override void Write(CiFieldAccess expr)
{
WriteChild(expr, expr.Obj);
Write('.');
WriteCamelCase(expr.Field.Name);
}
protected override void Write(CiPropertyAccess expr)
{
if (expr.Property == CiLibrary.SByteProperty)
Write(expr.Obj);
else if (expr.Property == CiLibrary.LowByteProperty) {
Write("(byte) ");
WriteChild(expr, expr.Obj);
}
else if (expr.Property == CiLibrary.StringLengthProperty) {
WriteChild(expr, expr.Obj);
Write(".length()");
}
else
throw new ArgumentException(expr.Property.Name);
}
protected override void WriteName(CiMethod method)
{
WriteCamelCase(method.Name);
}
protected override void WriteDelegateCall(CiExpr expr)
{
Write(expr);
Write(".run");
}
protected override void Write(CiMethodCall expr)
{
if (expr.Method == CiLibrary.MulDivMethod) {
Write("(int) ((long) ");
WriteMulDiv(CiPriority.Prefix, expr);
}
else if (expr.Method == CiLibrary.CharAtMethod) {
Write(expr.Obj);
Write(".charAt(");
Write(expr.Arguments[0]);
Write(')');
}
else if (expr.Method == CiLibrary.SubstringMethod) {
if (expr.Arguments[0].HasSideEffect) {
Write("substring(");
Write(expr.Obj);
Write(", ");
Write(expr.Arguments[0]);
Write(", ");
Write(expr.Arguments[1]);
Write(')');
this.UsesSubstringMethod = true;
}
else {
Write(expr.Obj);
Write(".substring(");
Write(expr.Arguments[0]);
Write(", ");
WriteSum(expr.Arguments[0], expr.Arguments[1]);
Write(')');
}
}
else if (expr.Method == CiLibrary.ArrayCopyToMethod) {
Write("System.arraycopy(");
Write(expr.Obj);
Write(", ");
Write(expr.Arguments[0]);
Write(", ");
Write(expr.Arguments[1]);
Write(", ");
Write(expr.Arguments[2]);
Write(", ");
Write(expr.Arguments[3]);
Write(')');
}
else if (expr.Method == CiLibrary.ArrayToStringMethod) {
Write("new String(");
Write(expr.Obj);
Write(", ");
Write(expr.Arguments[0]);
Write(", ");
Write(expr.Arguments[1]);
Write(')');
}
else if (expr.Method == CiLibrary.ArrayStorageClearMethod) {
Write("clear(");
Write(expr.Obj);
Write(')');
CiType type = ((CiArrayStorageType) expr.Obj.Type).ElementType;
if (type == CiByteType.Value)
this.UsesClearBytesMethod = true;
else if (type == CiIntType.Value)
this.UsesClearIntsMethod = true;
else
throw new ArgumentException(type.Name);
}
else
base.Write(expr);
}
protected override void Write(CiBinaryExpr expr)
{
switch (expr.Op) {
case CiToken.Equal:
case CiToken.NotEqual:
if (expr.Left.Type is CiStringType && !expr.Left.IsConst(null) && !expr.Right.IsConst(null)) {
if (expr.Op == CiToken.NotEqual)
Write('!');
Write(expr.Left);
Write(".equals(");
Write(expr.Right);
Write(')');
return;
}
break;
default:
break;
}
base.Write(expr);
}
protected override void Write(CiBinaryResourceExpr expr)
{
Write("getBinaryResource(");
WriteConst(expr.Resource.Name);
Write(", ");
Write(expr.Resource.Content.Length);
Write(')');
}
protected override void Write(CiCondExpr expr)
{
if (expr.ResultType == CiByteType.Value && expr.OnTrue is CiConstExpr && expr.OnFalse is CiConstExpr) {
// avoid error: possible loss of precision
Write("(byte) (");
base.Write(expr);
Write(')');
}
else
base.Write(expr);
}
protected override void WriteNew(CiType type)
{
CiClassStorageType classType = type as CiClassStorageType;
if (classType != null) {
Write("new ");
Write(classType.Class.Name);
Write("()");
}
else {
CiArrayStorageType arrayType = (CiArrayStorageType) type;
Write("new ");
WriteBaseType(arrayType.BaseType);
WriteInitializer(arrayType);
}
}
protected override void Write(CiCoercion expr)
{
if (expr.ResultType == CiByteType.Value && expr.Inner.Type == CiIntType.Value) {
Write("(byte) ");
WriteChild(expr, (CiExpr) expr.Inner); // TODO: Assign
}
else if (expr.ResultType == CiIntType.Value && expr.Inner.Type == CiByteType.Value) {
WriteChild(CiPriority.And, (CiExpr) expr.Inner); // TODO: Assign
Write(" & 0xff");
}
else
base.Write(expr);
}
public override void Visit(CiVar stmt)
{
Write(stmt.Type);
Write(stmt.Name);
if (!WriteInit(stmt.Type) && stmt.InitialValue != null) {
Write(" = ");
Write(stmt.InitialValue);
}
}
protected override void WriteFallthrough(CiExpr expr)
{
WriteLine("//$FALL-THROUGH$");
}
public override void Visit(CiThrow stmt)
{
Write("throw new Exception(");
Write(stmt.Message);
WriteLine(");");
}
void WriteSignature(CiDelegate del, string name)
{
Write(del.ReturnType);
WriteCamelCase(name);
Write('(');
bool first = true;
foreach (CiParam param in del.Params) {
if (first)
first = false;
else
Write(", ");
Write(param.Type);
Write(param.Name);
}
Write(')');
}
void ICiSymbolVisitor.Visit(CiMethod method)
{
WriteLine();
WriteDoc(method);
if (method.CallType == CiCallType.Override)
WriteLine("@Override");
Write(method.Visibility);
switch (method.CallType) {
case CiCallType.Static: Write("static "); break;
case CiCallType.Normal: if (method.Visibility != CiVisibility.Private) Write("final "); break;
case CiCallType.Abstract: Write("abstract "); break;
default: break;
}
WriteSignature(method.Signature, method.Name);
if (method.Throws)
Write(" throws Exception");
if (method.CallType == CiCallType.Abstract)
WriteLine(";");
else {
WriteLine();
Write(method.Body);
}
}
void WriteClearMethod(string elementType)
{
Write("private static void clear(");
Write(elementType);
WriteLine("[] array)");
OpenBlock();
WriteLine("for (int i = 0; i < array.length; i++)");
this.Indent++;
WriteLine("array[i] = 0;");
this.Indent--;
CloseBlock();
}
void WriteSubstringMethod()
{
WriteLine("private static String substring(String s, int offset, int length)");
OpenBlock();
WriteLine("return s.substring(offset, offset + length);");
CloseBlock();
}
void WriteGetBinaryResource(CiClass klass)
{
WriteLine();
WriteLine("private static byte[] getBinaryResource(String name, int length)");
OpenBlock();
Write("java.io.DataInputStream dis = new java.io.DataInputStream(");
Write(klass.Name);
WriteLine(".class.getResourceAsStream(name));");
WriteLine("byte[] result = new byte[length];");
Write("try "); OpenBlock();
Write("try "); OpenBlock();
WriteLine("dis.readFully(result);");
CloseBlock();
Write("finally "); OpenBlock();
WriteLine("dis.close();");
CloseBlock();
CloseBlock();
Write("catch (java.io.IOException e) "); OpenBlock();
WriteLine("throw new RuntimeException();");
CloseBlock();
WriteLine("return result;");
CloseBlock();
}
void ICiSymbolVisitor.Visit(CiClass klass)
{
CreateJavaFile(klass);
OpenClass(klass.IsAbstract, klass, " extends ");
this.UsesSubstringMethod = false;
this.UsesClearBytesMethod = false;
this.UsesClearIntsMethod = false;
if (klass.Constructor != null) {
Write("public ");
Write(klass.Name);
WriteLine("()");
Write(klass.Constructor.Body);
}
foreach (CiSymbol member in klass.Members)
member.Accept(this);
if (this.UsesSubstringMethod)
WriteSubstringMethod();
if (this.UsesClearBytesMethod)
WriteClearMethod("byte");
if (this.UsesClearIntsMethod)
WriteClearMethod("int");
if (klass.BinaryResources.Length > 0)
WriteGetBinaryResource(klass);
foreach (CiConst konst in klass.ConstArrays) {
Write("private static final ");
Write(konst.Type);
WriteUppercaseWithUnderscores(konst.GlobalName);
Write(" = ");
WriteConst(konst.Value);
WriteLine(";");
}
CloseJavaFile();
}
void ICiSymbolVisitor.Visit(CiDelegate del)
{
// TODO: doc
CreateJavaFile(del);
Write("interface ");
WriteLine(del.Name);
OpenBlock();
WriteSignature(del, "run");
WriteLine(";");
CloseJavaFile();
}
public override void Write(CiProgram prog)
{
foreach (CiSymbol symbol in prog.Globals)
symbol.Accept(this);
}
}
}