diff options
Diffstat (limited to 'src/main/java/org/pdfbox/io/ASCII85InputStream.java')
| -rw-r--r-- | src/main/java/org/pdfbox/io/ASCII85InputStream.java | 269 |
1 files changed, 0 insertions, 269 deletions
diff --git a/src/main/java/org/pdfbox/io/ASCII85InputStream.java b/src/main/java/org/pdfbox/io/ASCII85InputStream.java deleted file mode 100644 index 863d64d..0000000 --- a/src/main/java/org/pdfbox/io/ASCII85InputStream.java +++ /dev/null @@ -1,269 +0,0 @@ -/**
- * Copyright (c) 2003, www.pdfbox.org
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following disclaimer in the documentation
- * and/or other materials provided with the distribution.
- * 3. Neither the name of pdfbox; nor the names of its
- * contributors may be used to endorse or promote products derived from this
- * software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * http://www.pdfbox.org
- *
- */
-package org.pdfbox.io;
-
-import java.io.FilterInputStream;
-import java.io.InputStream;
-import java.io.IOException;
-
-/**
- * This class represents an ASCII85 stream.
- *
- * @author Ben Litchfield
- * @version $Revision: 1.5 $
- */
-public class ASCII85InputStream extends FilterInputStream
-{
- private int index;
- private int n;
- private boolean eof;
-
- private byte[] ascii;
- private byte[] b;
-
- /**
- * Constructor.
- *
- * @param is The input stream to actually read from.
- */
- public ASCII85InputStream( InputStream is )
- {
- super(is);
- index = 0;
- n = 0;
- eof = false;
- ascii = new byte[5];
- b = new byte[4];
- }
-
- /**
- * This will read the next byte from the stream.
- *
- * @return The next byte read from the stream.
- *
- * @throws IOException If there is an error reading from the wrapped stream.
- */
- public final int read() throws IOException
- {
- if( index >= n )
- {
- if(eof)
- {
- return -1;
- }
- index = 0;
- int k;
- byte z;
- do
- {
- int zz=(byte)in.read();
- if(zz==-1)
- {
- eof=true;
- return -1;
- }
- z = (byte)zz;
- } while( z=='\n' || z=='\r' || z==' ');
-
- if (z == '~' || z=='x')
- {
- eof=true;
- ascii=b=null;
- n = 0;
- return -1;
- }
- else if (z == 'z')
- {
- b[0]=b[1]=b[2]=b[3]=0;
- n = 4;
- }
- else
- {
- ascii[0]=z; // may be EOF here....
- for (k=1;k<5;++k)
- {
- do
- {
- int zz=(byte)in.read();
- if(zz==-1)
- {
- eof=true;
- return -1;
- }
- z=(byte)zz;
- } while ( z=='\n' || z=='\r' || z==' ' );
- ascii[k]=z;
- if (z == '~' || z=='x')
- {
- break;
- }
- }
- n = k - 1;
- if ( n==0 )
- {
- eof = true;
- ascii = null;
- b = null;
- return -1;
- }
- if ( k < 5 )
- {
- for (++k; k < 5; ++k )
- {
- ascii[k] = 0x21;
- }
- eof=true;
- }
- // decode stream
- long t=0;
- for ( k=0; k<5; ++k)
- {
- z=(byte)(ascii[k] - 0x21);
- if (z < 0 || z > 93)
- {
- n = 0;
- eof = true;
- ascii = null;
- b = null;
- throw new IOException("Invalid data in Ascii85 stream");
- }
- t = (t * 85L) + z;
- }
- for ( k = 3; k>=0; --k)
- {
- b[k] = (byte)(t & 0xFFL);
- t>>>=8;
- }
- }
- }
- return b[index++] & 0xFF;
- }
-
- /**
- * This will read a chunk of data.
- *
- * @param data The buffer to write data to.
- * @param offset The offset into the data stream.
- * @param len The number of byte to attempt to read.
- *
- * @return The number of bytes actually read.
- *
- * @throws IOException If there is an error reading data from the underlying stream.
- */
- public final int read(byte[] data, int offset, int len) throws IOException
- {
- if(eof && index>=n)
- {
- return -1;
- }
- for(int i=0;i<len;i++)
- {
- if(index<n)
- {
- data[i+offset]=b[index++];
- }
- else
- {
- int t = read();
- if ( t == -1 )
- {
- return i;
- }
- data[i+offset]=(byte)t;
- }
- }
- return len;
- }
-
- /**
- * This will close the underlying stream and release any resources.
- *
- * @throws IOException If there is an error closing the underlying stream.
- */
- public void close() throws IOException
- {
- ascii = null;
- eof = true;
- b = null;
- super.close();
- }
-
- /**
- * non supported interface methods.
- *
- * @return False always.
- */
- public boolean markSupported()
- {
- return false;
- }
-
- /**
- * Unsupported.
- *
- * @param nValue ignored.
- *
- * @return Always zero.
- */
- public long skip(long nValue)
- {
- return 0;
- }
-
- /**
- * Unsupported.
- *
- * @return Always zero.
- */
- public int available()
- {
- return 0;
- }
-
- /**
- * Unsupported.
- *
- * @param readlimit ignored.
- */
- public void mark(int readlimit)
- {
- }
-
- /**
- * Unsupported.
- *
- * @throws IOException telling that this is an unsupported action.
- */
- public void reset() throws IOException
- {
- throw new IOException("Reset is not supported");
- }
-}
\ No newline at end of file |