1 files changed, 179 insertions, 0 deletions
diff --git a/connectivity/source/drivers/jdbc/Reader.cxx b/connectivity/source/drivers/jdbc/Reader.cxx
new file mode 100644
index 000000000..8dd12157e
--- /dev/null
+++ b/connectivity/source/drivers/jdbc/Reader.cxx
@@ -0,0 +1,179 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <java/io/Reader.hxx>
+#include <string.h>
+#include <osl/diagnose.h>
+using namespace connectivity;
+using ::com::sun::star::uno::Sequence;
+
+
+//************ Class: java.io.Reader
+
+
+jclass java_io_Reader::theClass = nullptr;
+java_io_Reader::java_io_Reader( JNIEnv * pEnv, jobject myObj )
+    : java_lang_Object( pEnv, myObj )
+{
+    SDBThreadAttach::addRef();
+}
+java_io_Reader::~java_io_Reader()
+{
+    SDBThreadAttach::releaseRef();
+}
+
+jclass java_io_Reader::getMyClass() const
+{
+    // the class must be fetched only once, therefore static
+    if( !theClass )
+        theClass = findMyClass("java/io/Reader");
+    return theClass;
+}
+
+sal_Int32 SAL_CALL java_io_Reader::readSomeBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead )
+{
+    return readBytes(aData,nMaxBytesToRead);
+}
+
+void SAL_CALL java_io_Reader::skipBytes( sal_Int32 nBytesToSkip )
+{
+    static jmethodID mID(nullptr);
+    if(nBytesToSkip <= 0)
+        return;
+
+    if(m_buf)
+    {
+        m_buf.reset();
+        --nBytesToSkip;
+    }
+
+    static_assert(sizeof(jchar) == 2, "I thought Java characters were UTF16 code units?");
+    sal_Int32 nCharsToSkip = nBytesToSkip / sizeof(jchar);
+    callIntMethodWithIntArg_ThrowRuntime("skip",mID,nCharsToSkip);
+    if(nBytesToSkip % sizeof(jchar) != 0)
+    {
+        assert(nBytesToSkip % sizeof(jchar) == 1);
+        Sequence< sal_Int8 > aData(1);
+        assert(m_buf);
+        readBytes(aData, 1);
+    }
+}
+
+sal_Int32 SAL_CALL java_io_Reader::available(  )
+{
+    if(m_buf)
+        return 1;
+    bool out;
+    SDBThreadAttach t; OSL_ENSURE(t.pEnv,"Java environment has been deleted!");
+
+    {
+        static const char * const cSignature = "()Z";
+        static const char * const cMethodName = "ready";
+        // Java-Call
+        static jmethodID mID(nullptr);
+        obtainMethodId_throwRuntime(t.pEnv, cMethodName,cSignature, mID);
+        out = t.pEnv->CallBooleanMethod( object, mID);
+        ThrowRuntimeException(t.pEnv,*this);
+    } //t.pEnv
+    return (m_buf ? 1 : 0) + (out ? 1 : 0); // no way to tell *how much* is ready
+}
+
+void SAL_CALL java_io_Reader::closeInput(  )
+{
+    static jmethodID mID(nullptr);
+    callVoidMethod_ThrowRuntime("close", mID);
+}
+
+sal_Int32 SAL_CALL java_io_Reader::readBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead )
+{
+    OSL_ENSURE(aData.getLength() >= nBytesToRead," Sequence is smaller than BytesToRead");
+
+    if(nBytesToRead == 0)
+        return 0;
+
+    sal_Int8 *dst(aData.getArray());
+    sal_Int32 nBytesWritten(0);
+
+    if (m_buf)
+    {
+        if(!aData.hasElements())
+        {
+            aData.realloc(1);
+            dst = aData.getArray();
+        }
+        *dst = *m_buf;
+        m_buf.reset();
+        ++nBytesWritten;
+        ++dst;
+        --nBytesToRead;
+    }
+
+    if(nBytesToRead == 0)
+        return nBytesWritten;
+
+    sal_Int32 nCharsToRead = (nBytesToRead + 1)/2;
+
+    jint outChars(0);
+    SDBThreadAttach t; OSL_ENSURE(t.pEnv,"Java environment has been deleted!");
+
+    {
+        jcharArray pCharArray = t.pEnv->NewCharArray(nCharsToRead);
+        static const char * const cSignature = "([CII)I";
+        static const char * const cMethodName = "read";
+        // Java-Call
+        static jmethodID mID(nullptr);
+        obtainMethodId_throwRuntime(t.pEnv, cMethodName,cSignature, mID);
+        outChars = t.pEnv->CallIntMethod( object, mID, pCharArray, 0, nCharsToRead );
+        if ( !outChars )
+        {
+            if(nBytesWritten==0)
+                ThrowRuntimeException(t.pEnv,*this);
+            else
+                return 1;
+        }
+        if(outChars > 0)
+        {
+            static_assert(sizeof(jchar) == 2, "I thought Java characters were UTF16 code units?");
+            const sal_Int32 jcs = sizeof(jchar);
+            const sal_Int32 outBytes = std::min(nBytesToRead, outChars*jcs);
+            assert(outBytes == outChars*jcs || outBytes == outChars*jcs - 1);
+
+            jboolean p = JNI_FALSE;
+            if(aData.getLength() < nBytesWritten + outBytes)
+            {
+                aData.realloc(nBytesWritten + outBytes);
+                dst = aData.getArray() + nBytesWritten;
+            }
+            jchar *outBuf(t.pEnv->GetCharArrayElements(pCharArray,&p));
+
+            memcpy(dst, outBuf, outBytes);
+            nBytesWritten += outBytes;
+            if(outBytes < outChars*jcs)
+            {
+                assert(outChars*jcs - outBytes == 1);
+                assert(!m_buf);
+                m_buf = reinterpret_cast<char*>(outBuf)[outBytes];
+            }
+        }
+        t.pEnv->DeleteLocalRef(pCharArray);
+    } //t.pEnv
+    return nBytesWritten;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */