Improve bytcode generation.

src/core/org/luaj/vm2/LuaString.java

@@ -56,6 +56,14 @@ public class LuaString extends LuaValue {
 		this.m_length = bytes.length;
 	}
 
+	public static LuaString valueOf(char[] bytes) {
+		int n = bytes.length;
+		byte[] b = new byte[n];
+		for ( int i=0; i<n; i++ )
+			b[i] = (byte) bytes[i];
+		return new LuaString(b, 0, n);
+	}
+	
 	public boolean isstring() {
 		return true; 
 	}
@@ -401,6 +409,23 @@ public class LuaString extends LuaValue {
 		}
 	}
 
+	public boolean isValidUtf8() {
+		int i,j,n,b,e=0;
+		for ( i=m_offset,j=m_offset+m_length,n=0; i<j; ++n ) {
+			int c = m_bytes[i++];
+			if ( c >= 0 ) continue;
+			if ( ((c & 0xE0) == 0xC0) 
+					&& i<j 
+					&& (m_bytes[i++] & 0xC0) == 0x80) continue;
+			if ( ((c & 0xF0) == 0xE0) 
+					&& i+1<j 
+					&& (m_bytes[i++] & 0xC0) == 0x80 
+					&& (m_bytes[i++] & 0xC0) == 0x80) continue;
+			return false;
+		}
+		return true;
+	}
+	
 	// --------------------- number conversion -----------------------
 	
 	/** 

test/junit/org/luaj/vm2/AllTests.java

@@ -24,7 +24,6 @@ package org.luaj.vm2;
 import junit.framework.Test;
 import junit.framework.TestSuite;
 
-import org.luaj.vm2.CompatibiltyTest.LuaJCCompatibilityTest;
 import org.luaj.vm2.WeakTableTest.WeakKeyTableTest;
 import org.luaj.vm2.WeakTableTest.WeakKeyValueTableTest;
 

test/junit/org/luaj/vm2/CompatibiltyTest.java

@@ -24,6 +24,7 @@ package org.luaj.vm2;
 import junit.framework.Test;
 import junit.framework.TestSuite;
 
+import org.luaj.vm2.compiler.LuaC;
 import org.luaj.vm2.luajc.JavaBytecodeCompiler;
 
 /**
@@ -62,7 +63,6 @@ public class CompatibiltyTest {
 		suite.addTest( new TestSuite( JseCompatibilityTest.class,   "JSE Tests" ) );
 		suite.addTest( new TestSuite( JmeCompatibilityTest.class,   "JME Tests" ) );
 		suite.addTest( new TestSuite( JseBytecodeTest.class,        "JSE Bytecode Tests" ) );
-		suite.addTest( new TestSuite( LuaJCCompatibilityTest.class,   "LuaJC Gen Tests" ) );
 		return suite;
 	}
 
@@ -82,6 +82,7 @@ public class CompatibiltyTest {
 		protected void setUp() throws Exception {
 			super.setUp();
 			System.setProperty("JME", "false");
+			LuaC.install();
 		}
 	}
 	public static class JseBytecodeTest extends CompatibiltyTestSuite {
@@ -93,16 +94,7 @@ public class CompatibiltyTest {
 			System.setProperty("JME", "false");
 			JavaBytecodeCompiler.install();
 		}
-	}
-	public static class LuaJCCompatibilityTest extends CompatibiltyTestSuite {
-		public LuaJCCompatibilityTest() {
-			super(ScriptDrivenTest.PlatformType.LUAJIT);
-		}
-		protected void setUp() throws Exception {
-			super.setUp();
-			System.setProperty("JME", "false");
-		}
-		// skipping - not supported yet
+		// not supported on this platform - don't test
 		public void testDebugLib()      {}	
 	}
 }