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- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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.
- */
-
- /* $Id$ */
-
- package org.apache.fop.fonts.type1;
-
- import java.io.EOFException;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.DataInputStream;
- import java.io.InputStreamReader;
-
- /**
- * This is a helper class for reading PFM files. It defines functions for
- * extracting specific values out of the stream.
- */
- public class PFMInputStream extends java.io.FilterInputStream {
-
- private final DataInputStream datain;
-
- /**
- * Constructs a PFMInputStream based on an InputStream representing the
- * PFM file.
- *
- * @param in The stream from which to read the PFM file
- */
- public PFMInputStream(InputStream in) {
- super(in);
- datain = new DataInputStream(in);
- }
-
- /**
- * Parses a one byte value out of the stream.
- *
- * @return The value extracted
- * @throws IOException In case of an I/O problem
- */
- public short readByte() throws IOException {
- short s = datain.readByte();
- // Now, we've got to trick Java into forgetting the sign
- int s1 = (((s & 0xF0) >>> 4) << 4) + (s & 0x0F);
- return (short)s1;
- }
-
- /**
- * Parses a two byte value out of the stream.
- *
- * @return The value extracted
- * @throws IOException In case of an I/O problem
- */
- public int readShort() throws IOException {
- int i = datain.readShort();
-
- // Change byte order
- int high = (i & 0xFF00) >>> 8;
- int low = (i & 0x00FF) << 8;
- return low + high;
- }
-
- /**
- * Parses a four byte value out of the stream.
- *
- * @return The value extracted
- * @throws IOException In case of an I/O problem
- */
- public long readInt() throws IOException {
- int i = datain.readInt();
-
- // Change byte order
- int i1 = (i & 0xFF000000) >>> 24;
- int i2 = (i & 0x00FF0000) >>> 8;
- int i3 = (i & 0x0000FF00) << 8;
- int i4 = (i & 0x000000FF) << 24;
- return i1 + i2 + i3 + i4;
- }
-
- /**
- * Parses a zero-terminated string out of the stream.
- *
- * @return The value extracted
- * @throws IOException In case of an I/O problem
- */
- public String readString() throws IOException {
- InputStreamReader reader = new InputStreamReader(in, "ISO-8859-1");
- StringBuffer buf = new StringBuffer();
-
- int ch = reader.read();
- while (ch > 0) {
- buf.append((char)ch);
- ch = reader.read();
- }
- if (ch == -1) {
- throw new EOFException("Unexpected end of stream reached");
- }
- return buf.toString();
- }
-
- }
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