Documentation / cleanup

h2/src/tools/org/h2/java/ClassObj.java

@@ -372,6 +372,11 @@ class Type {
         return asString();
     }
 
+    /**
+     * Get the C++ code.
+     *
+     * @return the C++ code
+     */
     public String asString() {
         StringBuilder buff = new StringBuilder();
         for (int i = 0; i < arrayLevel; i++) {
@@ -392,10 +397,14 @@ class Type {
             }
         }
         for (int i = 0; i < arrayLevel; i++) {
-            buff.append(" >");
             if (refCount) {
                 buff.append(" >");
+            } else {
+                if (!classObj.isPrimitive) {
+                    buff.append("*");
+                }
             }
+            buff.append(" >");
         }
         if (!refCount) {
             if (isObject()) {
@@ -417,5 +426,26 @@ class Type {
         return false;
     }
 
+    /**
+     * Get the default value, for primitive types (0 usually).
+     *
+     * @param context the context
+     * @return the expression
+     */
+    public Expr getDefaultValue(JavaParser context) {
+        if (classObj.isPrimitive) {
+            LiteralExpr literal = new LiteralExpr(context, classObj.className);
+            literal.literal = "0";
+            CastExpr cast = new CastExpr();
+            cast.type = this;
+            cast.expr = literal;
+            cast.type = this;
+            return cast;
+        }
+        LiteralExpr literal = new LiteralExpr(context, classObj.className);
+        literal.literal = "null";
+        return literal;
+    }
+
 }
 

h2/src/tools/org/h2/java/JavaParser.java

@@ -22,7 +22,15 @@ import org.h2.util.New;
  */
 public class JavaParser {
 
-    public static final boolean REF_COUNT = true;
+    /**
+     * Whether ref-counting is used.
+     */
+    public static final boolean REF_COUNT = false;
+
+    /**
+     * Whether ref-counting is used for constants.
+     */
+    public static final boolean REF_COUNT_STATIC = false;
 
     private static final HashMap<String, ClassObj> BUILT_IN_CLASSES = New.hashMap();
 
@@ -245,6 +253,12 @@ public class JavaParser {
         return c;
     }
 
+    /**
+     * Get the class for a built-in type.
+     *
+     * @param type the type
+     * @return the class or null if not found
+     */
     static ClassObj getBuiltInClass(String type) {
         return BUILT_IN_CLASSES.get(type);
     }
@@ -386,6 +400,8 @@ public class JavaParser {
                             } else {
                                 field.value = readExpr();
                             }
+                        } else {
+                            field.value = field.type.getDefaultValue(this);
                         }
                         read(";");
                         if (isStatic) {
@@ -495,8 +511,8 @@ public class JavaParser {
             while (source.charAt(current.index) != '\n') {
                 current.index++;
             }
-            StatementNative stat = new StatementNative();
-            stat.code = source.substring(start, current.index).trim();
+            String s = source.substring(start, current.index).trim();
+            StatementNative stat = new StatementNative(s);
             read();
             return isC ? stat : null;
         } else if (readIf("/*")) {
@@ -505,8 +521,8 @@ public class JavaParser {
             while (source.charAt(current.index) != '*' || source.charAt(current.index + 1) != '/') {
                 current.index++;
             }
-            StatementNative stat = new StatementNative();
-            stat.code = source.substring(start, current.index).trim();
+            String s = source.substring(start, current.index).trim();
+            StatementNative stat = new StatementNative(s);
             current.index += 2;
             read();
             return isC ? stat : null;
@@ -554,16 +570,16 @@ public class JavaParser {
             read(";");
             return new ContinueStatement();
         } else if (readIf("switch")) {
-            SwitchStatement switchStat = new SwitchStatement();
+
             read("(");
-            switchStat.expr = readExpr();
+            SwitchStatement switchStat = new SwitchStatement(readExpr());
             read(")");
             read("{");
             while (true) {
                 if (readIf("default")) {
                     read(":");
                     StatementBlock block = new StatementBlock();
-                    switchStat.defaultBlock = block;
+                    switchStat.setDefaultBlock(block);
                     while (true) {
                         block.instructions.add(readStatement());
                         if (current.token.equals("case") || current.token.equals("default") || current.token.equals("}")) {
@@ -571,7 +587,7 @@ public class JavaParser {
                         }
                     }
                 } else if (readIf("case")) {
-                    switchStat.cases.add(readExpr());
+                    Expr expr = readExpr();
                     read(":");
                     StatementBlock block = new StatementBlock();
                     while (true) {
@@ -580,7 +596,7 @@ public class JavaParser {
                             break;
                         }
                     }
-                    switchStat.blocks.add(block);
+                    switchStat.addCase(expr, block);
                 } else if (readIf("}")) {
                     break;
                 }
@@ -654,8 +670,7 @@ public class JavaParser {
                         f.type = dec.type;
                         f.name = varName;
                         localVars.put(varName, f);
-                        dec.variables.add(varName);
-                        dec.values.add(value);
+                        dec.addVariable(varName, value);
                         if (readIf(";")) {
                             break;
                         }
@@ -666,8 +681,7 @@ public class JavaParser {
                 current = start;
                 // ExprStatement
             }
-            ExprStatement stat = new ExprStatement();
-            stat.expr = readExpr();
+            ExprStatement stat = new ExprStatement(readExpr());
             read(";");
             return stat;
         }
@@ -992,7 +1006,7 @@ public class JavaParser {
                 if (ch >= 'a' && ch <= 'z') {
                     // don't use Character.toUpperCase
                     // to avoid locale problems
-                    // (the uppercase of i isn't always I)
+                    // (the uppercase of 'i' is not always 'I')
                     buff.append((char) (ch + 'A' - 'a'));
                 } else if (ch >= 'A' && ch <= 'Z') {
                     buff.append(ch);
@@ -1026,7 +1040,7 @@ public class JavaParser {
 
     private Expr readExpr5() {
         if (readIf("new")) {
-            NewExpr expr = new NewExpr(this);
+            NewExpr expr = new NewExpr();
             String typeName = readTypeOrIdentifier();
             expr.classObj = getClass(typeName);
             if (readIf("(")) {
@@ -1550,7 +1564,12 @@ public class JavaParser {
      */
     void writeHeader(PrintWriter out) {
         for (Statement s : nativeHeaders) {
-            out.println(s);
+            out.println(s.asString());
+        }
+        if (JavaParser.REF_COUNT_STATIC) {
+            out.println("#define STRING(s) STRING_REF(s)");
+        } else {
+            out.println("#define STRING(s) STRING_PTR(s)");
         }
         out.println();
         for (ClassObj c : classes.values()) {
@@ -1603,9 +1622,6 @@ public class JavaParser {
             for (FieldObj f : c.instanceFields.values()) {
                 out.print("    ");
                 out.print(f.type.asString() + " " + f.name);
-                if (f.value != null) {
-                    out.print(" = " + f.value);
-                }
                 out.println(";");
             }
             out.println("public:");
@@ -1640,7 +1656,7 @@ public class JavaParser {
         Collections.sort(constantNames);
         for (String c : constantNames) {
             String s = stringConstantToStringMap.get(c);
-            if (JavaParser.REF_COUNT) {
+            if (JavaParser.REF_COUNT_STATIC) {
                 out.println("ptr<java_lang_String> " + c + " = STRING(L\"" + s + "\");");
             } else {
                 out.println("java_lang_String* " + c + " = STRING(L\"" + s + "\");");
@@ -1655,9 +1671,9 @@ public class JavaParser {
      */
     void writeSource(PrintWriter out) {
         for (ClassObj c : classes.values()) {
-            out.println("/* " + c.className + ".cpp */");
+            out.println("/* " + c.className + " */");
             for (Statement s : c.nativeCode) {
-                out.println(s);
+                out.println(s.asString());
             }
             for (FieldObj f : c.staticFields.values()) {
                 StringBuilder buff = new StringBuilder();
@@ -1694,10 +1710,16 @@ public class JavaParser {
                     }
                     out.println(") {");
                     if (m.isConstructor) {
-                        // TODO
+                        for (FieldObj f : c.instanceFields.values()) {
+                            out.print("    ");
+                            out.print("this->" + f.name);
+                            out.print(" = " + f.value.asString());
+                            out.println(";");
+                        }
                     }
                     if (m.block != null) {
-                        out.print(m.block.toString());
+                        m.block.setMethod(m);
+                        out.print(m.block.asString());
                     }
                     out.println("}");
                     out.println();

h2/src/tools/org/h2/java/Test.java

@@ -30,11 +30,12 @@ public class Test extends TestBase {
         // chmod +x test
         // ./test
 
+        // TODO initialize fields
+
         // include files:
         // /usr/include/c++/4.2.1/tr1/stdio.h
         // /usr/include/stdio.h
-
-        // TODO initialize fields
+        // inttypes.h
 
         // not supported yet:
         // exceptions

h2/src/tools/org/h2/java/TestApp.java

@@ -26,8 +26,33 @@ int main(int argc, char** argv) {
      * @param args the command line arguments
      */
     public static void main(String... args) {
-        for (int i = 0; i < 10; i++) {
-            System.out.println("Hello " + i);
+        String[] list = new String[1000];
+        for (int i = 0; i < 1000; i++) {
+            list[i] = "Hello " + i;
+        }
+
+        // time:29244000 mac g++ -O3 without array bound checks
+        // time:30673000 mac java
+        // time:32449000 mac g++ -O3
+        // time:69692000 mac g++ -O3 ref counted
+        // time:1200000000 raspberry g++ -O3
+        // time:1720000000 raspberry g++ -O3 ref counted
+        // time:1980469000 raspberry java IcedTea6 1.8.13 Cacao VM
+        // time:12962645810 raspberry java IcedTea6 1.8.13 Zero VM
+        // java -XXaltjvm=cacao
+
+        for (int k = 0; k < 4; k++) {
+            long t = System.nanoTime();
+            long h = 0;
+            for (int j = 0; j < 10000; j++) {
+                for (int i = 0; i < 1000; i++) {
+                    String s = list[i];
+                    h = (h * 7) ^ s.hashCode();
+                }
+            }
+            System.out.println("hash: " + h);
+            t = System.nanoTime() - t;
+            System.out.println("time:" + t);
         }
     }
 

h2/src/tools/org/h2/java/io/PrintStream.java

@@ -18,7 +18,7 @@ public class PrintStream {
      */
     public void println(String s) {
         // c: int x = s->chars->length();
-        // c: printf("%.*S\n", x, s->chars->getData());
+        // c: printf("%.*S\n", x, s->chars->getPointer());
     }
 
 }

h2/src/tools/org/h2/java/lang/Integer.java

@@ -11,8 +11,14 @@ package org.h2.java.lang;
  */
 public class Integer {
 
+    /**
+     * The smallest possible value.
+     */
     public static final int MIN_VALUE = 1 << 31;
 
+    /**
+     * The largest possible value.
+     */
     public static final int MAX_VALUE = (int) ((1L << 31) - 1);
 
     /**
@@ -23,7 +29,7 @@ public class Integer {
      */
     public static String toString(int x) {
         // c: wchar_t ch[20];
-        // c: swprintf(ch, 20, L"%d", x);
+        // c: swprintf(ch, 20, L"%" PRId32, x);
         // c: return STRING(ch);
         // c: return;
         if (x == MIN_VALUE) {

h2/src/tools/org/h2/java/lang/Long.java

@@ -12,8 +12,14 @@ package org.h2.java.lang;
  */
 public class Long {
 
+    /**
+     * The smallest possible value.
+     */
     public static final long MIN_VALUE = 1L << 63;
 
+    /**
+     * The largest possible value.
+     */
     public static final long MAX_VALUE = (1L << 63) - 1;
 
     /**
@@ -24,7 +30,7 @@ public class Long {
      */
     public static String toString(long x) {
         // c: wchar_t ch[30];
-        // c: swprintf(ch, 30, L"%ld", x);
+        // c: swprintf(ch, 30, L"%" PRId64, x);
         // c: return STRING(ch);
         // c: return;
         if (x == MIN_VALUE) {

h2/src/tools/org/h2/java/lang/String.java

@@ -14,8 +14,11 @@ import org.h2.java.Local;
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
+#include <time.h>
 #include <wchar.h>
 #include <stdint.h>
+#define __STDC_FORMAT_MACROS
+#include <inttypes.h>
 
 #define jvoid void
 #define jboolean int8_t
@@ -31,9 +34,12 @@ import org.h2.java.Local;
 #define false 0
 #define null 0
 
-#define STRING(s) ptr<java_lang_String>(new java_lang_String(ptr< array<jchar> >(new array<jchar>(s, (jint) wcslen(s)))));
+#define STRING_REF(s) ptr<java_lang_String> \
+    (new java_lang_String(ptr< array<jchar> > \
+    (new array<jchar>(s, (jint) wcslen(s)))));
 
-// #define STRING(s) new java_lang_String(new array<jchar>(s, (jint) wcslen(s)));
+#define STRING_PTR(s) new java_lang_String \
+    (new array<jchar>(s, (jint) wcslen(s)));
 
 class RefBase {
 protected:
@@ -86,6 +92,9 @@ public:
     T& operator*() {
         return *pointer;
     }
+    T* getPointer() {
+        return pointer;
+    }
     T* operator->() {
         return pointer;
     }
@@ -112,7 +121,7 @@ public:
     ~array() {
         delete[] data;
     }
-    T* getData() {
+    T* getPointer() {
         return data;
     }
     jint length() {
@@ -180,15 +189,31 @@ public class String {
         return chars.length;
     }
 
+    /**
+     * The toString method.
+     *
+     * @return the string
+     */
     public String toStringMethod() {
         return this;
     }
 
+    /**
+     * Get the java.lang.String.
+     *
+     * @return the string
+     */
     @Ignore
     public java.lang.String asString() {
         return new java.lang.String(chars);
     }
 
+    /**
+     * Wrap a java.lang.String.
+     *
+     * @param x the string
+     * @return the object
+     */
     @Ignore
     public static String wrap(java.lang.String x) {
         return new String(x.toCharArray());

h2/src/tools/org/h2/java/lang/System.java

@@ -30,8 +30,8 @@ public class System {
      */
     public static void arraycopy(char[] src, int srcPos, char[] dest, int destPos, int length) {
         /* c:
-        memmove(((jchar*)dest->getData()) + destPos,
-            ((jchar*)src->getData()) + srcPos, sizeof(jchar) * length);
+        memmove(((jchar*)dest->getPointer()) + destPos,
+            ((jchar*)src->getPointer()) + srcPos, sizeof(jchar) * length);
         */
         // c: return;
         java.lang.System.arraycopy(src, srcPos, dest, destPos, length);
@@ -49,8 +49,8 @@ public class System {
      */
     public static void arraycopy(byte[] src, int srcPos, byte[] dest, int destPos, int length) {
         /* c:
-        memmove(((jbyte*)dest->getData()) + destPos,
-            ((jbyte*)src->getData()) + srcPos, sizeof(jbyte) * length);
+        memmove(((jbyte*)dest->getPointer()) + destPos,
+            ((jbyte*)src->getPointer()) + srcPos, sizeof(jbyte) * length);
         */
         // c: return;
         java.lang.System.arraycopy(src, srcPos, dest, destPos, length);