jni_jpegstream/src/outputstream_wrapper.cpp

/*
 * Copyright (C) 2013 The Android Open Source Project
 *
 * Licensed 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "outputstream_wrapper.h"
#include "error_codes.h"

jmethodID OutputStreamWrapper::sWriteID = NULL;

int32_t OutputStreamWrapper::write(int32_t length, int32_t offset) {
    if (offset < 0 || length < 0 || (offset + length) > getBufferSize()) {
        return J_ERROR_BAD_ARGS;
    }
    mEnv->ReleaseByteArrayElements(mByteArray, mBytes, JNI_COMMIT);
    mBytes = NULL;
    if (mEnv->ExceptionCheck()) {
        return J_EXCEPTION;
    }
    if (sWriteID == NULL) {
        LOGE("Uninitialized method ID for OutputStream write function.");
        return J_ERROR_FATAL;
    }
    // Call OutputStream write with byte array.
    mEnv->CallVoidMethod(mStream, sWriteID, mByteArray, offset, length);
    if (mEnv->ExceptionCheck()) {
        return J_EXCEPTION;
    }
    mBytes = mEnv->GetByteArrayElements(mByteArray, NULL);
    if (mBytes == NULL || mEnv->ExceptionCheck()) {
        return J_EXCEPTION;
    }
    return J_SUCCESS;
}

void OutputStreamWrapper::setWriteMethodID(jmethodID id) {
    sWriteID = id;
}