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/*
* [The "BSD licence"]
* Copyright (c) 2005-2008 Terence Parr
* All rights reserved.
*
* Conversion to C#:
* Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
namespace Antlr.Runtime
{
using NonSerialized = System.NonSerializedAttribute;
using Regex = System.Text.RegularExpressions.Regex;
using Serializable = System.SerializableAttribute;
[Serializable]
public class CommonToken : IToken
{
int type;
int line;
int charPositionInLine = -1; // set to invalid position
int channel = TokenChannels.Default;
[NonSerialized]
ICharStream input;
/** <summary>
* We need to be able to change the text once in a while. If
* this is non-null, then getText should return this. Note that
* start/stop are not affected by changing this.
* </summary>
*/
string text;
/** <summary>What token number is this from 0..n-1 tokens; < 0 implies invalid index</summary> */
int index = -1;
/** <summary>The char position into the input buffer where this token starts</summary> */
int start;
/** <summary>The char position into the input buffer where this token stops</summary> */
int stop;
public CommonToken()
{
}
public CommonToken( int type )
{
this.type = type;
}
public CommonToken( ICharStream input, int type, int channel, int start, int stop )
{
this.input = input;
this.type = type;
this.channel = channel;
this.start = start;
this.stop = stop;
}
public CommonToken( int type, string text )
{
this.type = type;
this.channel = TokenChannels.Default;
this.text = text;
}
public CommonToken( IToken oldToken )
{
text = oldToken.Text;
type = oldToken.Type;
line = oldToken.Line;
index = oldToken.TokenIndex;
charPositionInLine = oldToken.CharPositionInLine;
channel = oldToken.Channel;
input = oldToken.InputStream;
if ( oldToken is CommonToken )
{
start = ( (CommonToken)oldToken ).start;
stop = ( (CommonToken)oldToken ).stop;
}
}
#region IToken Members
public string Text
{
get
{
if ( text != null )
return text;
if ( input == null )
return null;
if (start <= stop && stop < input.Count)
return input.Substring( start, stop - start + 1 );
return "<EOF>";
}
set
{
/** Override the text for this token. getText() will return this text
* rather than pulling from the buffer. Note that this does not mean
* that start/stop indexes are not valid. It means that that input
* was converted to a new string in the token object.
*/
text = value;
}
}
public int Type
{
get
{
return type;
}
set
{
type = value;
}
}
public int Line
{
get
{
return line;
}
set
{
line = value;
}
}
public int CharPositionInLine
{
get
{
return charPositionInLine;
}
set
{
charPositionInLine = value;
}
}
public int Channel
{
get
{
return channel;
}
set
{
channel = value;
}
}
public int StartIndex
{
get
{
return start;
}
set
{
start = value;
}
}
public int StopIndex
{
get
{
return stop;
}
set
{
stop = value;
}
}
public int TokenIndex
{
get
{
return index;
}
set
{
index = value;
}
}
public ICharStream InputStream
{
get
{
return input;
}
set
{
input = value;
}
}
#endregion
public override string ToString()
{
string channelStr = "";
if ( channel > 0 )
{
channelStr = ",channel=" + channel;
}
string txt = Text;
if ( txt != null )
{
txt = Regex.Replace( txt, "\n", "\\\\n" );
txt = Regex.Replace( txt, "\r", "\\\\r" );
txt = Regex.Replace( txt, "\t", "\\\\t" );
}
else
{
txt = "<no text>";
}
return "[@" + TokenIndex + "," + start + ":" + stop + "='" + txt + "',<" + type + ">" + channelStr + "," + line + ":" + CharPositionInLine + "]";
}
[System.Runtime.Serialization.OnSerializing]
internal void OnSerializing( System.Runtime.Serialization.StreamingContext context )
{
if ( text == null )
text = Text;
}
}
}
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