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提交 dcbd0115 authored 作者: Thomas Mueller's avatar Thomas Mueller
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A Java parser / Java to C converter.

上级 49953a3d
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正在显示 包含 269 行增加 和 96 行删除
h2/src/tools/org/h2/java/ClassObj.java
浏览文件 @ dcbd0115
......@@ -34,6 +34,11 @@ public class ClassObj {
*/
boolean isPrimitive;
/**
* The primitive type (higher types are more complex)
*/
int primitiveType;
/**
* The imported classes.
*/
......@@ -52,7 +57,7 @@ public class ClassObj {
/**
* The methods.
*/
LinkedHashMap<String, MethodObj> methods = new LinkedHashMap<String, MethodObj>();
LinkedHashMap<String, ArrayList<MethodObj>> methods = new LinkedHashMap<String, ArrayList<MethodObj>>();
/**
* The list of native statements.
......@@ -64,16 +69,27 @@ public class ClassObj {
*/
int id;
Type baseType;
ClassObj() {
baseType = new Type();
baseType.classObj = this;
}
/**
* Add a method.
*
* @param method the method
*/
void addMethod(MethodObj method) {
if (methods.containsKey(method.name)) {
throw new RuntimeException("Method overloading is not supported: " + method.name);
ArrayList<MethodObj> list = methods.get(method.name);
if (list == null) {
list = new ArrayList<MethodObj>();
methods.put(method.name, list);
} else {
method.name = method.name + "_" + (list.size() + 1);
}
methods.put(method.name, method);
list.add(method);
}
/**
......@@ -101,6 +117,38 @@ public class ClassObj {
return name;
}
String getMethodName(String find, ArrayList<Expr> args) {
ArrayList<MethodObj> list = methods.get(find);
if (list == null) {
return name;
}
if (list.size() == 1) {
return list.get(0).name;
}
for (MethodObj m : list) {
if (!m.isVarArgs && m.parameters.size() != args.size()) {
continue;
}
boolean match = true;
int i = 0;
for (FieldObj f : m.parameters.values()) {
Expr a = args.get(i++);
Type t = a.getType();
if (t == null) {
System.out.println(a.getType());
}
if (!t.equals(f.type)) {
match = false;
break;
}
}
if (match) {
return m.name;
}
}
return name;
}
}
/**
......@@ -108,6 +156,8 @@ public class ClassObj {
*/
class MethodObj {
boolean isVarArgs;
/**
* Whether this method is static.
*/
......@@ -219,17 +269,19 @@ class Type {
/**
* The class.
*/
ClassObj type;
ClassObj classObj;
/**
* The array nesting level. 0 if not an array.
*/
int arrayLevel;
boolean isVarArgs;
public String toString() {
StringBuilder buff = new StringBuilder();
buff.append(JavaParser.toC(type.toString()));
if (!type.isPrimitive) {
buff.append(JavaParser.toC(classObj.toString()));
if (!classObj.isPrimitive) {
buff.append("*");
}
for (int i = 0; i < arrayLevel; i++) {
......@@ -237,5 +289,21 @@ class Type {
}
return buff.toString();
}
boolean isObject() {
return arrayLevel > 0 || !classObj.isPrimitive;
}
public int hashCode() {
return toString().hashCode();
}
public boolean equals(Object other) {
if (other instanceof Type) {
return this.toString().equals(other.toString());
}
return false;
}
}
h2/src/tools/org/h2/java/Expr.java
浏览文件 @ dcbd0115
......@@ -27,6 +27,7 @@ class CallExpr implements Expr {
final boolean isStatic;
final String className;
final String name;
ClassObj classObj;
CallExpr(JavaParser context, Expr expr, String className, String name, boolean isStatic) {
this.context = context;
......@@ -39,10 +40,12 @@ class CallExpr implements Expr {
public String toString() {
StringBuilder buff = new StringBuilder();
if (className != null) {
buff.append(JavaParser.toC(className + "." + name)).append("(");
classObj = context.getClassObj(className);
} else {
buff.append(JavaParser.toC(expr.getType().type + "." + name)).append("(");
classObj = expr.getType().classObj;
}
String methodName = classObj.getMethodName(name, args);
buff.append(JavaParser.toC(classObj.toString() + "." + methodName)).append("(");
int i = 0;
if (expr != null) {
buff.append(expr.toString());
......@@ -110,14 +113,25 @@ class ConditionalExpr implements Expr {
class LiteralExpr implements Expr {
String literal;
private final JavaParser context;
private final String className;
private Type type;
public LiteralExpr(JavaParser context, String className) {
this.context = context;
this.className = className;
}
public String toString() {
return literal;
}
public Type getType() {
// TODO
return null;
if (type == null) {
type = new Type();
type.classObj = context.getClassObj(className);
}
return type;
}
}
......@@ -130,6 +144,11 @@ class OpExpr implements Expr {
Expr left;
String op;
Expr right;
private final JavaParser context;
OpExpr(JavaParser context) {
this.context = context;
}
public String toString() {
if (left == null) {
......@@ -140,13 +159,35 @@ class OpExpr implements Expr {
if (op.equals(">>>")) {
// ujint / ujlong
return "(((u" + left.getType() + ") " + left + ") >> " + right + ")";
} else if (op.equals("+")) {
if (left.getType().isObject() || right.getType().isObject()) {
// TODO convert primitive to to String, call toString
return "STRING_CONCAT(" + left + ", " + right + ")";
}
}
return "(" + left + " " + op + " " + right + ")";
}
public Type getType() {
// TODO
return null;
if (left == null) {
return right.getType();
}
if (right == null) {
return left.getType();
}
if (op.equals("+")) {
if (left.getType().isObject() || right.getType().isObject()) {
Type t = new Type();
t.classObj = context.getClassObj("java.lang.String");
return t;
}
}
Type lt = left.getType();
Type rt = right.getType();
if (lt.classObj.primitiveType < rt.classObj.primitiveType) {
return rt;
}
return lt;
}
}
......@@ -184,7 +225,7 @@ class NewExpr implements Expr {
public Type getType() {
Type t = new Type();
t.type = type;
t.classObj = type;
t.arrayLevel = arrayInitExpr.size();
return t;
}
......@@ -201,13 +242,23 @@ class StringExpr implements Expr {
*/
String text;
private final JavaParser context;
private Type type;
StringExpr(JavaParser context) {
this.context = context;
}
public String toString() {
return "STRING(\"" + javaEncode(text) + "\")";
}
public Type getType() {
// TODO
return null;
if (type == null) {
type = new Type();
type.classObj = context.getClassObj("java.lang.String");
}
return type;
}
/**
......@@ -384,7 +435,7 @@ class ArrayAccessExpr implements Expr {
public Type getType() {
Type t = new Type();
t.type = base.getType().type;
t.classObj = base.getType().classObj;
t.arrayLevel = base.getType().arrayLevel - 1;
return t;
}
......
h2/src/tools/org/h2/java/JavaParser.java
浏览文件 @ dcbd0115
......@@ -59,30 +59,31 @@ public class JavaParser {
RESERVED.add(s);
}
int id = 0;
addBuiltInType(id++, true, "void");
addBuiltInType(id++, true, "int");
addBuiltInType(id++, true, "char");
addBuiltInType(id++, true, "byte");
addBuiltInType(id++, true, "long");
addBuiltInType(id++, true, "double");
addBuiltInType(id++, true, "float");
addBuiltInType(id++, true, "boolean");
addBuiltInType(id++, true, "short");
addBuiltInType(id++, true, 0, "void");
addBuiltInType(id++, true, 1, "boolean");
addBuiltInType(id++, true, 2, "byte");
addBuiltInType(id++, true, 3, "short");
addBuiltInType(id++, true, 4, "char");
addBuiltInType(id++, true, 5, "int");
addBuiltInType(id++, true, 6, "long");
addBuiltInType(id++, true, 7, "float");
addBuiltInType(id++, true, 8, "double");
String[] java = { "Boolean", "Byte", "Character", "Class", "ClassLoader", "Double", "Float",
"Integer", "Long", "Math", "Number", "Object", "Runtime", "Short", "String", "StringBuffer",
"StringBuilder", "System", "Thread", "ThreadGroup", "ThreadLocal", "Throwable", "Void" };
for (String s : java) {
JAVA_IMPORT_MAP.put(s, "java.lang." + s);
addBuiltInType(id++, false, "java.lang." + s);
addBuiltInType(id++, false, 0, "java.lang." + s);
}
firstClassId = id;
}
private static void addBuiltInType(int id, boolean primitive, String type) {
private static void addBuiltInType(int id, boolean primitive, int primitiveType, String type) {
ClassObj typeObj = new ClassObj();
typeObj.id = id;
typeObj.name = type;
typeObj.isPrimitive = primitive;
typeObj.primitiveType = primitiveType;
BUILT_IN_TYPES.put(type, typeObj);
}
......@@ -263,12 +264,12 @@ public class JavaParser {
initThisPointer();
}
if (readIf("(")) {
if (type.type != classObj) {
if (type.classObj != classObj) {
throw getSyntaxException("Constructor of wrong type: " + type);
}
method.name = "init_obj";
method.isConstructor = true;
parseFormalParameters();
parseFormalParameters(method);
if (!readIf(";")) {
method.block = readStatement();
}
......@@ -277,7 +278,7 @@ public class JavaParser {
String name = readIdentifier();
method.name = name;
if (readIf("(")) {
parseFormalParameters();
parseFormalParameters(method);
if (!readIf(";")) {
method.block = readStatement();
}
......@@ -313,8 +314,9 @@ public class JavaParser {
private Expr readArrayInit(Type type) {
ArrayInitExpr expr = new ArrayInitExpr();
expr.type = new Type();
expr.type.type = type.type;
expr.type.classObj = type.classObj;
expr.type.arrayLevel = type.arrayLevel - 1;
if (!readIf("}")) {
while (true) {
expr.list.add(readExpr());
if (readIf("}")) {
......@@ -325,6 +327,7 @@ public class JavaParser {
break;
}
}
}
return expr;
}
......@@ -333,23 +336,24 @@ public class JavaParser {
thisPointer.isLocal = true;
thisPointer.name = "this";
thisPointer.type = new Type();
thisPointer.type.type = classObj;
thisPointer.type.classObj = classObj;
}
private Type readType(String name) {
Type type = new Type();
type.type = getClass(name);
type.classObj = getClass(name);
while (readIf("[")) {
read("]");
type.arrayLevel++;
}
if (readIf("...")) {
type.arrayLevel++;
type.isVarArgs = true;
}
return type;
}
private void parseFormalParameters() {
private void parseFormalParameters(MethodObj methodObj) {
if (readIf(")")) {
return;
}
......@@ -358,8 +362,11 @@ public class JavaParser {
field.isLocal = true;
String typeName = readTypeOrIdentifier();
field.type = readType(typeName);
if (field.type.isVarArgs) {
methodObj.isVarArgs = true;
}
field.name = readIdentifier();
method.parameters.put(field.name, field);
methodObj.parameters.put(field.name, field);
if (readIf(")")) {
break;
}
......@@ -486,6 +493,10 @@ public class JavaParser {
String typeName = readTypeOrIdentifier();
Type type = readType(typeName);
String name = readIdentifier();
FieldObj f = new FieldObj();
f.name = name;
f.type = type;
localVars.put(name, f);
read(":");
forStat.iterableType = type;
forStat.iterableVariable = name;
......@@ -603,7 +614,7 @@ public class JavaParser {
if (readIf("||") || readIf("&&") || readIf("|") || readIf("^") || readIf("&") || readIf("==") || readIf("!=")
|| readIf("<") || readIf(">") || readIf("<=") || readIf(">=") || readIf("<<") || readIf(">>")
|| readIf(">>>") || readIf("+") || readIf("-") || readIf("*") || readIf("/") || readIf("%")) {
OpExpr opExpr = new OpExpr();
OpExpr opExpr = new OpExpr(this);
opExpr.left = expr;
opExpr.op = infixOp;
opExpr.right = readExpr3();
......@@ -625,7 +636,7 @@ public class JavaParser {
read(")");
CastExpr expr = new CastExpr();
expr.type = new Type();
expr.type.type = c;
expr.type.classObj = c;
expr.expr = readExpr();
return expr;
}
......@@ -637,7 +648,7 @@ public class JavaParser {
}
String prefix = current.token;
if (readIf("++") || readIf("--") || readIf("!") || readIf("~") || readIf("+") || readIf("-")) {
OpExpr expr = new OpExpr();
OpExpr expr = new OpExpr(this);
expr.op = prefix;
expr.right = readExpr3();
return expr;
......@@ -645,7 +656,7 @@ public class JavaParser {
Expr expr = readExpr4();
String suffix = current.token;
if (readIf("++") || readIf("--")) {
OpExpr opExpr = new OpExpr();
OpExpr opExpr = new OpExpr(this);
opExpr.left = expr;
opExpr.op = suffix;
expr = opExpr;
......@@ -655,22 +666,23 @@ public class JavaParser {
private Expr readExpr4() {
if (readIf("false")) {
LiteralExpr expr = new LiteralExpr();
LiteralExpr expr = new LiteralExpr(this, "boolean");
expr.literal = "false";
return expr;
}
if (readIf("true")) {
LiteralExpr expr = new LiteralExpr();
LiteralExpr expr = new LiteralExpr(this, "boolean");
expr.literal = "true";
return expr;
}
if (readIf("null")) {
LiteralExpr expr = new LiteralExpr();
LiteralExpr expr = new LiteralExpr(this, "java.lang.Object");
expr.literal = "null";
return expr;
}
if (current.type == TOKEN_LITERAL_NUMBER) {
LiteralExpr expr = new LiteralExpr();
// TODO or long, float, double
LiteralExpr expr = new LiteralExpr(this, "int");
expr.literal = current.token.substring(1);
readToken();
return expr;
......@@ -699,12 +711,13 @@ public class JavaParser {
expr = e2;
if (n.equals("length") && t.arrayLevel > 0) {
e2.field = new FieldObj();
e2.field.type = BUILT_IN_TYPES.get("int").baseType;
e2.field.name = "length";
} else {
if (t == null || t.type == null) {
if (t == null || t.classObj == null) {
e2.name = n;
} else {
FieldObj f = t.type.instanceFields.get(n);
FieldObj f = t.classObj.instanceFields.get(n);
if (f == null) {
throw getSyntaxException("Unknown field: " + expr + "." + n);
}
......@@ -744,7 +757,7 @@ public class JavaParser {
return expr;
}
if (current.type == TOKEN_LITERAL_STRING) {
StringExpr expr = new StringExpr();
StringExpr expr = new StringExpr(this);
expr.text = current.token.substring(1);
readToken();
return expr;
......@@ -818,6 +831,9 @@ public class JavaParser {
}
}
expr.field = f;
if (f == null) {
System.out.println("?");
}
if (f != null && (!f.isLocal && !f.isStatic)) {
VariableExpr ve = new VariableExpr();
ve.field = thisPointer;
......@@ -1246,8 +1262,8 @@ public class JavaParser {
if (f.isFinal) {
buff.append("const ");
}
buff.append(toC(f.type.type.toString()));
if (!f.type.type.isPrimitive) {
buff.append(toC(f.type.classObj.toString()));
if (!f.type.classObj.isPrimitive) {
buff.append("*");
}
buff.append(" ").append(toC(c.name + "." + f.name));
......@@ -1270,7 +1286,8 @@ public class JavaParser {
}
out.println("};");
out.println("typedef struct " + toC(c.name) + " " + toC(c.name) + ";");
for (MethodObj m : c.methods.values()) {
for (ArrayList<MethodObj> list : c.methods.values()) {
for (MethodObj m : list) {
out.print(m.returnType + " " + toC(c.name) + "_" + m.name + "(");
int i = 0;
if (!m.isStatic && !m.isConstructor) {
......@@ -1286,6 +1303,7 @@ public class JavaParser {
}
out.println(");");
}
}
out.println();
}
}
......@@ -1306,8 +1324,8 @@ public class JavaParser {
if (f.isFinal) {
buff.append("const ");
}
buff.append(toC(f.type.type.toString()));
if (!f.type.type.isPrimitive) {
buff.append(toC(f.type.classObj.toString()));
if (!f.type.classObj.isPrimitive) {
buff.append("*");
}
buff.append(" ").append(toC(c.name + "." + f.name));
......@@ -1320,7 +1338,8 @@ public class JavaParser {
buff.append(";");
out.println(buff.toString());
}
for (MethodObj m : c.methods.values()) {
for (ArrayList<MethodObj> list : c.methods.values()) {
for (MethodObj m : list) {
out.print(m.returnType + " " + toC(c.name) + "_" + m.name + "(");
int i = 0;
if (!m.isStatic && !m.isConstructor) {
......@@ -1349,6 +1368,7 @@ public class JavaParser {
}
}
}
}
private static String indent(String s, int spaces) {
StringBuilder buff = new StringBuilder(s.length() + spaces);
......@@ -1391,6 +1411,14 @@ public class JavaParser {
return classObj;
}
ClassObj getClassObj(String className) {
ClassObj c = BUILT_IN_TYPES.get(className);
if (c == null) {
c = classes.get(className);
}
return c;
}
}
/**
......
h2/src/tools/org/h2/java/TestApp.java
浏览文件 @ dcbd0115
......@@ -6,6 +6,7 @@
*/
package org.h2.java;
/**
* A test application.
*/
......
h2/src/tools/org/h2/java/util/Arrays.java
浏览文件 @ dcbd0115
......@@ -23,6 +23,31 @@ public class Arrays {
}
}
/**
* Fill an array with the given value.
*
* @param array the array
* @param x the value
*/
public static void fill(byte[] array, byte x) {
for (int i = 0; i < array.length; i++) {
array[i] = x;
}
}
/**
* Fill an array with the given value.
*
* @param array the array
* @param x the value
*/
public static void fill(int[] array, int x) {
for (int i = 0; i < array.length; i++) {
array[i] = x;
}
}
/**
* Fill an array with the given value.
*
......
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