96 lines
2.5 KiB
Java
96 lines
2.5 KiB
Java
// Copyright (c) 2013 Adobe Systems Inc
|
|
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
|
|
// The above copyright notice and this permission notice shall be included in
|
|
// all copies or substantial portions of the Software.
|
|
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
// THE SOFTWARE.
|
|
|
|
package flascc;
|
|
|
|
import java.io.IOException;
|
|
import java.io.InputStream;
|
|
import java.io.OutputStream;
|
|
|
|
class SWFRecord
|
|
{
|
|
public final short tag;
|
|
public final byte[] payload;
|
|
|
|
public final int length;
|
|
|
|
public static SWFRecord read(InputStream is) throws IOException
|
|
{
|
|
int tagAndLen = is.read() | (is.read() << 8);
|
|
|
|
if(tagAndLen < 0)
|
|
return null;
|
|
|
|
short tag = (short)(tagAndLen >> 6);
|
|
int length;
|
|
|
|
if((tagAndLen & 63) == 63)
|
|
length = is.read() | (is.read() << 8) | (is.read() << 16) | (is.read() << 24);
|
|
else
|
|
length = tagAndLen & 63;
|
|
|
|
if(length < 0)
|
|
return null;
|
|
|
|
byte[] payload = new byte[length];
|
|
int read = 0;
|
|
|
|
while(read < payload.length)
|
|
{
|
|
int chunk = is.read(payload, read, payload.length-read);
|
|
if(chunk <= 0)
|
|
return null;
|
|
read += chunk;
|
|
}
|
|
return new SWFRecord(tag, payload);
|
|
}
|
|
|
|
public void write(OutputStream os) throws IOException
|
|
{
|
|
int len = payload.length;
|
|
int tagAndLen = (tag << 6);
|
|
|
|
if(len > 62)
|
|
tagAndLen |= 63; // always use extended length
|
|
else
|
|
tagAndLen |= len;
|
|
|
|
os.write(tagAndLen);
|
|
os.write(tagAndLen >> 8);
|
|
|
|
if(len > 62)
|
|
{
|
|
os.write(len);
|
|
os.write(len >> 8);
|
|
os.write(len >> 16);
|
|
os.write(len >> 24);
|
|
}
|
|
|
|
os.write(payload);
|
|
}
|
|
|
|
public SWFRecord(short tag, byte[] payload)
|
|
{
|
|
this.tag = tag;
|
|
this.payload = payload;
|
|
length = ((payload.length > 62) ? 6 : 2) + payload.length;
|
|
}
|
|
}
|