/*
* Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package build.tools.dtdbuilder;
import javax.swing.text.html.parser.*;
import java.io.IOException;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.Reader;
import java.io.InputStreamReader;
import java.io.CharArrayReader;
import java.io.FilterReader;
import java.util.Stack;
import java.net.URL;
/**
* A stream for reading HTML files. This stream takes care
* of \r\n conversions and parameter entity expansion.
*
* @see DTD
* @see DTDParser
* @author Arthur van Hoff
* @author Steven B. Byrne
*/
public final
class DTDInputStream extends FilterReader implements DTDConstants {
public DTD dtd;
public Stack<Object> stack = new Stack<>();
public char str[] = new char[64];
public int replace = 0;
public int ln = 1;
public int ch;
/**
* Create the stream.
*/
public DTDInputStream(InputStream in, DTD dtd) throws IOException {
super(new InputStreamReader(in));
this.dtd = dtd;
this.ch = in.read();
}
/**
* Error
*/
public void error(String msg) {
System.out.println("line " + ln + ": dtd input error: " + msg);
}
/**
* Push a single character
*/
public void push(int ch) throws IOException {
char data[] = {(char)ch};
push(new CharArrayReader(data));
}
/**
* Push an array of bytes.
*/
public void push(char data[]) throws IOException {
if (data.length > 0) {
push(new CharArrayReader(data));
}
}
/**
* Push an entire input stream
*/
void push(Reader in) throws IOException {
stack.push(new Integer(ln));
stack.push(new Integer(ch));
stack.push(this.in);
this.in = in;
ch = in.read();
}
/**
* Read a character from the input. Automatically pop
* a stream of the stack if the EOF is reached. Also replaces
* parameter entities.
* [60] 350:22
*/
@SuppressWarnings("fallthrough")
public int read() throws IOException {
switch (ch) {
case '%': {
ch = in.read();
if (replace > 0) {
return '%';
}
int pos = 0;
while (((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z')) ||
((ch >= '0') && (ch <= '9')) || (ch == '.') || (ch == '-')) {
str[pos++] = (char)ch;
ch = in.read();
}
if (pos == 0) {
return '%';
}
String nm = new String(str, 0, pos);
Entity ent = dtd.getEntity(nm);
if (ent == null) {
error("undefined entity reference: " + nm);
return read();
}
// Skip ; or RE
switch (ch) {
case '\r':
ln++;
/* fall through */
case ';':
ch = in.read();
break;
case '\n':
ln++;
if ((ch = in.read()) == '\r') {
ch = in.read();
}
break;
}
// Push the entity.
try {
push(getEntityInputReader(ent));
} catch (Exception e) {
error("entity data not found: " + ent + ", " + ent.getString());
}
return read();
}
case '\n':
ln++;
if ((ch = in.read()) == '\r') {
ch = in.read();
}
return '\n';
case '\r':
ln++;
ch = in.read();
return '\n';
case -1:
if (stack.size() > 0) {
in = (Reader)stack.pop();
ch = ((Integer)stack.pop()).intValue();
ln = ((Integer)stack.pop()).intValue();
return read();
}
return -1;
default:
int c = ch;
ch = in.read();
return c;
}
}
/**
* Return the data as a stream.
*/
private Reader getEntityInputReader(Entity ent) throws IOException {
if ((ent.type & Entity.PUBLIC) != 0) {
// InputStream is = DTDBuilder.mapping.get(ent.getString()).openStream();
// return new InputStreamReader(is);
String path = DTDBuilder.mapping.get(ent.getString());
return new InputStreamReader(new FileInputStream(path));
}
if ((ent.type & Entity.SYSTEM) != 0) {
//InputStream is = new URL(DTDBuilder.mapping.base, ent.getString()).openStream();
String path = DTDBuilder.mapping.baseStr + ent.getString();
return new InputStreamReader(new FileInputStream(path));
}
return new CharArrayReader(ent.data);
}
}