From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../javax/imageio/stream/ImageInputStreamImpl.java | 542 +++++++++++++++++++++ 1 file changed, 542 insertions(+) create mode 100644 libjava/classpath/javax/imageio/stream/ImageInputStreamImpl.java (limited to 'libjava/classpath/javax/imageio/stream/ImageInputStreamImpl.java') diff --git a/libjava/classpath/javax/imageio/stream/ImageInputStreamImpl.java b/libjava/classpath/javax/imageio/stream/ImageInputStreamImpl.java new file mode 100644 index 000000000..72fd6de48 --- /dev/null +++ b/libjava/classpath/javax/imageio/stream/ImageInputStreamImpl.java @@ -0,0 +1,542 @@ +/* ImageInputStream.java -- + Copyright (C) 2004 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package javax.imageio.stream; + +import gnu.java.lang.CPStringBuilder; + +import java.io.DataInputStream; +import java.io.EOFException; +import java.io.IOException; +import java.nio.ByteOrder; +import java.util.Stack; + +/** + * @author Michael Koch (konqueror@gmx.de) + */ +public abstract class ImageInputStreamImpl implements ImageInputStream +{ + private boolean closed; + private Stack markStack = new Stack(); + + byte[] buffer = new byte[8]; + + protected int bitOffset; + protected ByteOrder byteOrder = ByteOrder.BIG_ENDIAN; + protected long flushedPos; + protected long streamPos; + + public ImageInputStreamImpl() + { + // Do nothing here. + } + + protected final void checkClosed() + throws IOException + { + if (closed) + throw new IOException("stream closed"); + } + + public void close() + throws IOException + { + checkClosed(); + closed = true; + } + + protected void finalize() + throws Throwable + { + if (!closed) + close(); + } + + public void flush() + throws IOException + { + flushBefore(getStreamPosition()); + } + + public void flushBefore(long position) + throws IOException + { + if (position < flushedPos) + throw new IndexOutOfBoundsException(); + + if (position > streamPos) + throw new IndexOutOfBoundsException(); + + flushedPos = position; + } + + public int getBitOffset() + throws IOException + { + checkClosed(); + return bitOffset; + } + + public ByteOrder getByteOrder() + { + return byteOrder; + } + + public long getFlushedPosition() + { + return flushedPos; + } + + public long getStreamPosition() + throws IOException + { + checkClosed(); + return streamPos; + } + + public boolean isCached() + { + return false; + } + + public boolean isCachedFile() + { + return false; + } + + public boolean isCachedMemory() + { + return false; + } + + public long length() + { + return -1L; + } + + public void mark() + { + try + { + markStack.push(new Long(getStreamPosition())); + } + catch (IOException e) + { + throw new RuntimeException(e); + } + } + + public abstract int read() + throws IOException; + + public abstract int read(byte[] data, int offset, int len) + throws IOException; + + public int read(byte[] data) + throws IOException + { + return read(data, 0, data.length); + } + + public int readBit() + throws IOException + { + checkClosed(); + + // Calculate new bit offset here as readByte clears it. + int newOffset = (bitOffset + 1) & 0x7; + + // Clears bitOffset. + byte data = readByte(); + + // If newOffset is 0 it means we just read the 8th bit in a byte + // and therefore we want to advance to the next byte. Otherwise + // we want to roll back the stream one byte so that future readBit + // calls read bits from the same current byte. + if (newOffset != 0) + { + seek(getStreamPosition() - 1); + data = (byte) (data >> (8 - newOffset)); + } + + bitOffset = newOffset; + return data & 0x1; + } + + public long readBits(int numBits) + throws IOException + { + checkClosed(); + + if (numBits < 0 || numBits > 64) + throw new IllegalArgumentException(); + + long bits = 0L; + + for (int i = 0; i < numBits; i++) + { + bits <<= 1; + bits |= readBit(); + } + return bits; + } + + public boolean readBoolean() + throws IOException + { + byte data = readByte(); + + return data != 0; + } + + public byte readByte() + throws IOException + { + checkClosed(); + + int data = read(); + + if (data == -1) + throw new EOFException(); + + return (byte) data; + } + + public void readBytes(IIOByteBuffer buffer, int len) + throws IOException + { + readFullyPrivate(buffer.getData(), buffer.getOffset(), len); + + buffer.setLength(len); + } + + public char readChar() + throws IOException + { + return (char) readShort(); + } + + public double readDouble() + throws IOException + { + return Double.longBitsToDouble(readLong()); + } + + public float readFloat() + throws IOException + { + return Float.intBitsToFloat(readInt()); + } + + public void readFully(byte[] data) + throws IOException + { + readFully(data, 0, data.length); + } + + public void readFully(byte[] data, int offset, int len) + throws IOException + { + readFullyPrivate(data, offset, len); + } + + public void readFully(char[] data, int offset, int len) + throws IOException + { + for (int i = 0; i < len; ++i) + data[offset + i] = readChar(); + } + + public void readFully(double[] data, int offset, int len) + throws IOException + { + for (int i = 0; i < len; ++i) + data[offset + i] = readDouble(); + } + + public void readFully(float[] data, int offset, int len) + throws IOException + { + for (int i = 0; i < len; ++i) + data[offset + i] = readFloat(); + } + + public void readFully(int[] data, int offset, int len) + throws IOException + { + for (int i = 0; i < len; ++i) + data[offset + i] = readInt(); + } + + public void readFully(long[] data, int offset, int len) + throws IOException + { + for (int i = 0; i < len; ++i) + data[offset + i] = readLong(); + } + + public void readFully(short[] data, int offset, int len) + throws IOException + { + for (int i = 0; i < len; ++i) + data[offset + i] = readShort(); + } + + public int readInt() + throws IOException + { + readFullyPrivate(buffer, 0, 4); + + if (getByteOrder() == ByteOrder.LITTLE_ENDIAN) + return (int) + (((int) (buffer[0] & 0xff) << 0) + | ((int) (buffer[1] & 0xff) << 8) + | ((int) (buffer[2] & 0xff) << 16) + | ((int) (buffer[3] & 0xff) << 24)); + + return (int) + (((int) (buffer[0] & 0xff) << 24) + + ((int) (buffer[1] & 0xff) << 16) + + ((int) (buffer[2] & 0xff) << 8) + + ((int) (buffer[3] & 0xff) << 0)); + } + + public String readLine() + throws IOException + { + checkClosed(); + + int c = -1; + boolean eol = false; + CPStringBuilder buffer = new CPStringBuilder(); + + c = read(); + if (c == -1) + return null; + + while (!eol) + { + switch(c) + { + case '\r': + // Check for following '\n'. + long oldPosition = getStreamPosition(); + c = read(); + if (c == -1 || c == '\n') + eol = true; + else + { + seek(oldPosition); + eol = true; + } + continue; + + case '\n': + eol = true; + continue; + + default: + buffer.append((char) c); + break; + } + c = read(); + if (c == -1) + eol = true; + } + + return buffer.toString(); + } + + public long readLong() + throws IOException + { + readFullyPrivate(buffer, 0, 8); + + if (getByteOrder() == ByteOrder.LITTLE_ENDIAN) + return (long) + (((long) (buffer[0] & 0xff) << 0) + | ((long) (buffer[1] & 0xff) << 8) + | ((long) (buffer[2] & 0xff) << 16) + | ((long) (buffer[3] & 0xff) << 24) + | ((long) (buffer[4] & 0xff) << 32) + | ((long) (buffer[5] & 0xff) << 40) + | ((long) (buffer[6] & 0xff) << 48) + | ((long) (buffer[7] & 0xff) << 56)); + + return (long) + (((long) (buffer[0] & 0xff) << 56) + | ((long) (buffer[1] & 0xff) << 48) + | ((long) (buffer[2] & 0xff) << 40) + | ((long) (buffer[3] & 0xff) << 32) + | ((long) (buffer[4] & 0xff) << 24) + | ((long) (buffer[5] & 0xff) << 16) + | ((long) (buffer[6] & 0xff) << 8) + | ((long) (buffer[7] & 0xff) << 0)); + } + + public short readShort() + throws IOException + { + readFullyPrivate(buffer, 0, 2); + + if (getByteOrder() == ByteOrder.LITTLE_ENDIAN) + return (short) + (((short) (buffer[0] & 0xff) << 0) + | ((short) (buffer[1] & 0xff) << 8)); + + return (short) + (((short) (buffer[0] & 0xff) << 8) + | ((short) (buffer[1] & 0xff) << 0)); + } + + public int readUnsignedByte() + throws IOException + { + return (int) readByte() & 0xff; + } + + public long readUnsignedInt() + throws IOException + { + return (long) readInt() & 0xffffffffL; + } + + public int readUnsignedShort() + throws IOException + { + return (int) readShort() & 0xffff; + } + + public String readUTF() + throws IOException + { + checkClosed(); + + String data; + ByteOrder old = getByteOrder(); + // Strings are always big endian. + setByteOrder(ByteOrder.BIG_ENDIAN); + + try + { + data = DataInputStream.readUTF(this); + } + finally + { + setByteOrder(old); + } + + return data; + } + + public void reset() + throws IOException + { + checkClosed(); + + long mark = ((Long) markStack.pop()).longValue(); + seek(mark); + } + + public void seek(long position) + throws IOException + { + checkClosed(); + + if (position < getFlushedPosition()) + throw new IndexOutOfBoundsException("position < flushed position"); + + streamPos = position; + bitOffset = 0; + } + + public void setBitOffset (int bitOffset) + throws IOException + { + checkClosed(); + + if (bitOffset < 0 || bitOffset > 7) + throw new IllegalArgumentException("bitOffset not between 0 and 7 inclusive"); + + this.bitOffset = bitOffset; + } + + public void setByteOrder(ByteOrder byteOrder) + { + this.byteOrder = byteOrder; + } + + public int skipBytes(int num) + throws IOException + { + checkClosed(); + + seek(getStreamPosition() + num); + bitOffset = 0; + return num; + } + + public long skipBytes(long num) + throws IOException + { + checkClosed(); + + seek(getStreamPosition() + num); + bitOffset = 0; + return num; + } + + private void readFullyPrivate (byte[] buf, int offset, int len) throws IOException + { + checkClosed(); + + if (len < 0) + throw new IndexOutOfBoundsException("Negative length: " + len); + + while (len > 0) + { + // read will block until some data is available. + int numread = read (buf, offset, len); + if (numread < 0) + throw new EOFException (); + len -= numread; + offset += numread; + } + bitOffset = 0; + } +} -- cgit v1.2.3