Android example source code file (FieldPacker.java)

This example Android source code file (FieldPacker.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

fieldpacker, illegalargumentexception, saving

The FieldPacker.java Android example source code

/*
 * Copyright (C) 2008 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.
 */

package android.renderscript;


/**
 * @hide
 *
 **/
public class FieldPacker {
    public FieldPacker(int len) {
        mPos = 0;
        mData = new byte[len];
    }

    public void align(int v) {
        while ((mPos & (v - 1)) != 0) {
            mData[mPos++] = 0;
        }
    }

    void reset() {
        mPos = 0;
    }

    void addI8(byte v) {
        mData[mPos++] = v;
    }

    void addI16(short v) {
        align(2);
        mData[mPos++] = (byte)(v & 0xff);
        mData[mPos++] = (byte)(v >> 8);
    }

    void addI32(int v) {
        align(4);
        mData[mPos++] = (byte)(v & 0xff);
        mData[mPos++] = (byte)((v >> 8) & 0xff);
        mData[mPos++] = (byte)((v >> 16) & 0xff);
        mData[mPos++] = (byte)((v >> 24) & 0xff);
    }

    void addI64(long v) {
        align(8);
        mData[mPos++] = (byte)(v & 0xff);
        mData[mPos++] = (byte)((v >> 8) & 0xff);
        mData[mPos++] = (byte)((v >> 16) & 0xff);
        mData[mPos++] = (byte)((v >> 24) & 0xff);
        mData[mPos++] = (byte)((v >> 32) & 0xff);
        mData[mPos++] = (byte)((v >> 40) & 0xff);
        mData[mPos++] = (byte)((v >> 48) & 0xff);
        mData[mPos++] = (byte)((v >> 56) & 0xff);
    }

    void addU8(short v) {
        if ((v < 0) || (v > 0xff)) {
            throw new IllegalArgumentException("Saving value out of range for type");
        }
        mData[mPos++] = (byte)v;
    }

    void addU16(int v) {
        if ((v < 0) || (v > 0xffff)) {
            throw new IllegalArgumentException("Saving value out of range for type");
        }
        align(2);
        mData[mPos++] = (byte)(v & 0xff);
        mData[mPos++] = (byte)(v >> 8);
    }

    void addU32(long v) {
        if ((v < 0) || (v > 0xffffffff)) {
            throw new IllegalArgumentException("Saving value out of range for type");
        }
        align(4);
        mData[mPos++] = (byte)(v & 0xff);
        mData[mPos++] = (byte)((v >> 8) & 0xff);
        mData[mPos++] = (byte)((v >> 16) & 0xff);
        mData[mPos++] = (byte)((v >> 24) & 0xff);
    }

    void addU64(long v) {
        if (v < 0) {
            throw new IllegalArgumentException("Saving value out of range for type");
        }
        align(8);
        mData[mPos++] = (byte)(v & 0xff);
        mData[mPos++] = (byte)((v >> 8) & 0xff);
        mData[mPos++] = (byte)((v >> 16) & 0xff);
        mData[mPos++] = (byte)((v >> 24) & 0xff);
        mData[mPos++] = (byte)((v >> 32) & 0xff);
        mData[mPos++] = (byte)((v >> 40) & 0xff);
        mData[mPos++] = (byte)((v >> 48) & 0xff);
        mData[mPos++] = (byte)((v >> 56) & 0xff);
    }

    void addF32(float v) {
        addI32(Float.floatToRawIntBits(v));
    }

    void addF64(float v) {
        addI64(Double.doubleToRawLongBits(v));
    }

    final byte[] getData() {
        return mData;
    }

    private final byte mData[];
    private int mPos;

}