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65 lines
1.4 KiB
65 lines
1.4 KiB
package cx.sfy.LagAssist.utils;
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import java.io.ByteArrayOutputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.nio.IntBuffer;
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import java.util.List;
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public class MathUtils {
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public static int toMegaByte(long bytes) {
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return (int) (bytes / 1048576);
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}
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public static boolean isInt(String str) {
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try {
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int d = Integer.parseInt(str);
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d = d + 1;
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} catch (NumberFormatException nfe) {
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return false;
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}
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return true;
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}
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public static byte[] integersToBytes(List<Integer> values, int length) {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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DataOutputStream wrt = new DataOutputStream(baos);
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try {
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for (int i : values) {
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wrt.writeInt(i);
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}
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wrt.flush();
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wrt.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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byte[] good = new byte[length];
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System.arraycopy(baos.toByteArray(), 0, good, 0, length);
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return good;
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}
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public static int[] bytesToIntegers(byte[] raw) {
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int rst = raw.length % 4;
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byte[] bts = new byte[raw.length + 4 - rst];
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System.arraycopy(raw, 0, bts, 0, raw.length);
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IntBuffer intBuf = ByteBuffer.wrap(bts).order(ByteOrder.BIG_ENDIAN).asIntBuffer();
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int[] pixels = new int[intBuf.remaining()];
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intBuf.get(pixels);
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return pixels;
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}
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}
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