| /* |
| * Copyright 2000-2013 JetBrains s.r.o. |
| * |
| * 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. |
| */ |
| |
| /* |
| * @author max |
| */ |
| package com.intellij.util.io; |
| |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.io.DataInput; |
| import java.io.EOFException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| public class CompactDataInput implements DataInput { |
| private final InputStream in; |
| private final byte[] readBuffer = IOUtil.allocReadWriteUTFBuffer(); |
| |
| public CompactDataInput(InputStream in) { |
| this.in = in; |
| } |
| |
| @Override |
| public void readFully(@NotNull byte[] b) throws IOException { |
| readFully(b, 0, b.length); |
| } |
| |
| @Override |
| public void readFully(@NotNull byte[] b, int off, int len) throws IOException { |
| if (len < 0) |
| throw new IndexOutOfBoundsException(); |
| int n = 0; |
| while (n < len) { |
| int count = in.read(b, off + n, len - n); |
| if (count < 0) |
| throw new EOFException(); |
| n += count; |
| } |
| } |
| |
| @Override |
| public int skipBytes(int n) throws IOException { |
| int total = 0; |
| int cur = 0; |
| |
| while ((total<n) && ((cur = (int) in.skip(n-total)) > 0)) { |
| total += cur; |
| } |
| |
| return total; |
| } |
| |
| @Override |
| public boolean readBoolean() throws IOException { |
| int ch = in.read(); |
| if (ch < 0) |
| throw new EOFException(); |
| return (ch != 0); |
| } |
| |
| @Override |
| public byte readByte() throws IOException { |
| int ch = in.read(); |
| if (ch < 0) |
| throw new EOFException(); |
| return (byte)(ch); |
| } |
| |
| @Override |
| public int readUnsignedByte() throws IOException { |
| int ch = in.read(); |
| if (ch < 0) |
| throw new EOFException(); |
| return ch; |
| } |
| |
| @Override |
| public short readShort() throws IOException { |
| int ch1 = in.read(); |
| int ch2 = in.read(); |
| if ((ch1 | ch2) < 0) |
| throw new EOFException(); |
| return (short)((ch1 << 8) + (ch2 << 0)); |
| } |
| |
| @Override |
| public int readUnsignedShort() throws IOException { |
| int ch1 = in.read(); |
| int ch2 = in.read(); |
| if ((ch1 | ch2) < 0) |
| throw new EOFException(); |
| return (ch1 << 8) + (ch2 << 0); |
| } |
| |
| @Override |
| public char readChar() throws IOException { |
| int ch1 = in.read(); |
| int ch2 = in.read(); |
| if ((ch1 | ch2) < 0) |
| throw new EOFException(); |
| return (char)((ch1 << 8) + (ch2 << 0)); |
| } |
| |
| @Override |
| public int readInt() throws IOException { |
| return DataInputOutputUtil.readINT(this); |
| } |
| |
| @Override |
| public long readLong() throws IOException { // TODO: Make longs actually compact |
| readFully(readBuffer, 0, 8); |
| return (((long)readBuffer[0] << 56) + |
| ((long)(readBuffer[1] & 255) << 48) + |
| ((long)(readBuffer[2] & 255) << 40) + |
| ((long)(readBuffer[3] & 255) << 32) + |
| ((long)(readBuffer[4] & 255) << 24) + |
| ((readBuffer[5] & 255) << 16) + |
| ((readBuffer[6] & 255) << 8) + |
| ((readBuffer[7] & 255) << 0)); |
| } |
| |
| @Override |
| public float readFloat() throws IOException { |
| return Float.intBitsToFloat(readInt()); |
| } |
| |
| @Override |
| public double readDouble() throws IOException { |
| return Double.longBitsToDouble(readLong()); |
| } |
| |
| @Override |
| public String readLine() throws IOException { |
| throw new UnsupportedOperationException("readLine is not implemented!"); |
| } |
| |
| @NotNull |
| @Override |
| public String readUTF() throws IOException { |
| return IOUtil.readUTFFast(readBuffer, this); |
| } |
| } |