summaryrefslogtreecommitdiff
path: root/src/fjbg/ch/epfl/lamp/util/ByteArray.java
diff options
context:
space:
mode:
Diffstat (limited to 'src/fjbg/ch/epfl/lamp/util/ByteArray.java')
-rw-r--r--src/fjbg/ch/epfl/lamp/util/ByteArray.java145
1 files changed, 0 insertions, 145 deletions
diff --git a/src/fjbg/ch/epfl/lamp/util/ByteArray.java b/src/fjbg/ch/epfl/lamp/util/ByteArray.java
deleted file mode 100644
index b852e1ac1f..0000000000
--- a/src/fjbg/ch/epfl/lamp/util/ByteArray.java
+++ /dev/null
@@ -1,145 +0,0 @@
-/* FJBG -- Fast Java Bytecode Generator
- * Copyright 2002-2013 LAMP/EPFL
- * @author Michel Schinz
- */
-
-package ch.epfl.lamp.util;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-
-/**
- * Array of bytes.
- *
- * @author Michel Schinz
- * @version 1.0
- */
-
-public class ByteArray {
- protected final static int BYTE_BLOCK_BITS = 8;
- protected final static int BYTE_BLOCK_SIZE = 1 << BYTE_BLOCK_BITS;
- protected final static int BYTE_BLOCK_MASK = BYTE_BLOCK_SIZE - 1;
-
- protected byte[][] data = new byte[][] { new byte[BYTE_BLOCK_SIZE] };
- protected int pos = 0; // The next free position.
-
- protected boolean frozen = false;
-
- public ByteArray() { }
-
- public ByteArray(InputStream stream, int size) throws IOException {
- pos = size;
- for (int i = 0; size > 0; ++i) {
- int sizeToRead = Math.min(BYTE_BLOCK_SIZE, size);
- stream.read(data[i], 0, sizeToRead);
-
- size -= sizeToRead;
- if (size > 0) addNewBlock();
- }
- }
-
- public void freeze() { frozen = true; }
-
- public int nextBytePosition() {
- return pos;
- }
-
- public int getSize() {
- return pos;
- }
-
- protected void addNewBlock() {
- int nextBlockPos = pos >>> BYTE_BLOCK_BITS;
- if (nextBlockPos == data.length) {
- byte[][] newData = new byte[data.length * 2][];
- System.arraycopy(data, 0, newData, 0, data.length);
- data = newData;
- }
- assert data[nextBlockPos] == null : pos + " " + nextBlockPos;
- data[nextBlockPos] = new byte[BYTE_BLOCK_SIZE];
- }
-
- protected void addByte(int b) {
- assert !frozen;
-
- if ((pos & BYTE_BLOCK_MASK) == 0 && pos > 0)
- addNewBlock();
- int currPos = pos++;
- data[currPos >>> BYTE_BLOCK_BITS][currPos & BYTE_BLOCK_MASK] = (byte)b;
- }
-
- public void addU1(int i) {
- assert i <= 0xFF : i;
- addByte(i);
- }
-
- public void addU2(int i) {
- assert i <= 0xFFFF : i;
-
- addByte(i >>> 8);
- addByte(i & 0xFF);
- }
-
- public void addU4(int i) {
- addByte(i >>> 24);
- addByte((i >>> 16) & 0xFF);
- addByte((i >>> 8) & 0xFF);
- addByte(i & 0xFF);
- }
-
- public void putByte(int targetPos, int b) {
- assert !frozen;
- assert targetPos < pos : targetPos + " >= " + pos;
-
- data[targetPos >>> BYTE_BLOCK_BITS][targetPos & BYTE_BLOCK_MASK] = (byte)b;
- }
-
- public void putU2(int targetPos, int i) {
- assert i < 0xFFFF : i;
- putByte(targetPos, i >>> 8);
- putByte(targetPos + 1, i & 0xFF);
- }
-
- public void putU4(int targetPos, int i) {
- putByte(targetPos, i >>> 24);
- putByte(targetPos + 1, (i >>> 16) & 0xFF);
- putByte(targetPos + 2, (i >>> 8) & 0xFF);
- putByte(targetPos + 3, i & 0xFF);
- }
-
- public int getU1(int sourcePos) {
- assert sourcePos < pos : sourcePos + " >= " + pos;
- return data[sourcePos >>> BYTE_BLOCK_BITS][sourcePos & BYTE_BLOCK_MASK] & 0xFF;
- }
-
- public int getU2(int sourcePos) {
- return (getU1(sourcePos) << 8) | getU1(sourcePos + 1);
- }
-
- public int getU4(int sourcePos) {
- return (getU2(sourcePos) << 16) | getU2(sourcePos + 2);
- }
-
- public int getS1(int sourcePos) {
- assert sourcePos < pos : sourcePos + " >= " + pos;
- return data[sourcePos >>> BYTE_BLOCK_BITS][sourcePos & BYTE_BLOCK_MASK];
- }
-
- public int getS2(int sourcePos) {
- return (getS1(sourcePos) << 8) | getU1(sourcePos + 1);
- }
-
- public int getS4(int sourcePos) {
- return (getS2(sourcePos) << 16) | getU2(sourcePos + 2);
- }
-
- public void writeTo(OutputStream stream) throws IOException {
- if (!frozen) freeze();
-
- for (int i = 0; i < data.length && data[i] != null; ++i) {
- int len = Math.min(BYTE_BLOCK_SIZE, pos - (i << BYTE_BLOCK_BITS));
- stream.write(data[i], 0, len);
- }
- }
-}