SquirrelJME/SquirrelJME

/* -*- Mode: C; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// -------------------------------------------------------------------------*/

#include <jni.h>

#include "sjme/alloc.h"
#include "frontend/emulator/jniHelper.h"

void SJME_JNI_METHOD(SJME_CLASS_ALLOC_LINK, _1_1read)
    (JNIEnv* env, jclass classy, jlong blockPtr, jint at,
        jbyteArray buf, jint off, jint len)
{
    /* Use the get operation to "put" the bytes from native memory. */
    (*env)->SetByteArrayRegion(env, buf, off, len,
        SJME_JLONG_TO_POINTER(jbyte*, blockPtr + at));
}

jint SJME_JNI_METHOD(SJME_CLASS_ALLOC_LINK, _1_1size)
    (JNIEnv* env, jclass classy, jlong linkPtr)
{
    if (linkPtr == 0)
    {
        sjme_jni_throwVMException(env, SJME_ERROR_NULL_ARGUMENTS);
        return 0;
    }

    /* Get the allocation size. */
    return SJME_JLONG_TO_POINTER(sjme_alloc_link*, linkPtr)->allocSize;
}

void SJME_JNI_METHOD(SJME_CLASS_ALLOC_LINK, _1_1write)
    (JNIEnv* env, jclass classy, jlong blockPtr, jint at,
        jbyteArray buf, jint off, jint len)
{
    /* Use the get operation to "get" the bytes into the native memory. */
    (*env)->GetByteArrayRegion(env, buf, off, len,
        SJME_JLONG_TO_POINTER(jbyte*, blockPtr + at));
}