diff options
Diffstat (limited to 'runtime/CSharp3/Sources/Antlr3.Runtime/ANTLRStringStream.cs')
| -rw-r--r-- | runtime/CSharp3/Sources/Antlr3.Runtime/ANTLRStringStream.cs | 327 |
1 files changed, 0 insertions, 327 deletions
diff --git a/runtime/CSharp3/Sources/Antlr3.Runtime/ANTLRStringStream.cs b/runtime/CSharp3/Sources/Antlr3.Runtime/ANTLRStringStream.cs deleted file mode 100644 index b3f11b4..0000000 --- a/runtime/CSharp3/Sources/Antlr3.Runtime/ANTLRStringStream.cs +++ /dev/null @@ -1,327 +0,0 @@ -/* - * [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 System.Collections.Generic; - using ArgumentException = System.ArgumentException; - using ArgumentOutOfRangeException = System.ArgumentOutOfRangeException; - using ArgumentNullException = System.ArgumentNullException; - - /** <summary> - * A pretty quick CharStream that pulls all data from an array - * directly. Every method call counts in the lexer. Java's - * strings aren't very good so I'm avoiding. - * </summary> - */ - [System.Serializable] - public class ANTLRStringStream : ICharStream - { - /** <summary>The data being scanned</summary> */ - protected char[] data; - - /** <summary>How many characters are actually in the buffer</summary> */ - protected int n; - - /** <summary>0..n-1 index into string of next char</summary> */ - protected int p = 0; - - /** <summary>line number 1..n within the input</summary> */ - int line = 1; - - /** <summary>The index of the character relative to the beginning of the line 0..n-1</summary> */ - int charPositionInLine = 0; - - /** <summary>tracks how deep mark() calls are nested</summary> */ - protected int markDepth = 0; - - /** <summary> - * A list of CharStreamState objects that tracks the stream state - * values line, charPositionInLine, and p that can change as you - * move through the input stream. Indexed from 1..markDepth. - * A null is kept @ index 0. Create upon first call to mark(). - * </summary> - */ - protected IList<CharStreamState> markers; - - /** <summary>Track the last mark() call result value for use in rewind().</summary> */ - protected int lastMarker; - - /** <summary>What is name or source of this char stream?</summary> */ - public string name; - - /** <summary>Copy data in string to a local char array</summary> */ - public ANTLRStringStream( string input ) - : this( input, null ) - { - } - - public ANTLRStringStream( string input, string sourceName ) - : this( input.ToCharArray(), input.Length, sourceName ) - { - } - - /** <summary>This is the preferred constructor as no data is copied</summary> */ - public ANTLRStringStream( char[] data, int numberOfActualCharsInArray ) - : this( data, numberOfActualCharsInArray, null ) - { - } - - public ANTLRStringStream( char[] data, int numberOfActualCharsInArray, string sourceName ) - { - if (data == null) - throw new ArgumentNullException("data"); - if (numberOfActualCharsInArray < 0) - throw new ArgumentOutOfRangeException(); - if (numberOfActualCharsInArray > data.Length) - throw new ArgumentException(); - - this.data = data; - this.n = numberOfActualCharsInArray; - this.name = sourceName; - } - - protected ANTLRStringStream() - { - this.data = new char[0]; - } - - /** <summary> - * Return the current input symbol index 0..n where n indicates the - * last symbol has been read. The index is the index of char to - * be returned from LA(1). - * </summary> - */ - public virtual int Index - { - get - { - return p; - } - } - public virtual int Line - { - get - { - return line; - } - set - { - line = value; - } - } - public virtual int CharPositionInLine - { - get - { - return charPositionInLine; - } - set - { - charPositionInLine = value; - } - } - - /** <summary> - * Reset the stream so that it's in the same state it was - * when the object was created *except* the data array is not - * touched. - * </summary> - */ - public virtual void Reset() - { - p = 0; - line = 1; - charPositionInLine = 0; - markDepth = 0; - } - - public virtual void Consume() - { - //System.out.println("prev p="+p+", c="+(char)data[p]); - if ( p < n ) - { - charPositionInLine++; - if ( data[p] == '\n' ) - { - /* - System.out.println("newline char found on line: "+line+ - "@ pos="+charPositionInLine); - */ - line++; - charPositionInLine = 0; - } - p++; - //System.out.println("p moves to "+p+" (c='"+(char)data[p]+"')"); - } - } - - public virtual int LA( int i ) - { - if ( i == 0 ) - { - return 0; // undefined - } - if ( i < 0 ) - { - i++; // e.g., translate LA(-1) to use offset i=0; then data[p+0-1] - if ( ( p + i - 1 ) < 0 ) - { - return CharStreamConstants.EndOfFile; // invalid; no char before first char - } - } - - if ( ( p + i - 1 ) >= n ) - { - //System.out.println("char LA("+i+")=EOF; p="+p); - return CharStreamConstants.EndOfFile; - } - //System.out.println("char LA("+i+")="+(char)data[p+i-1]+"; p="+p); - //System.out.println("LA("+i+"); p="+p+" n="+n+" data.length="+data.length); - return data[p + i - 1]; - } - - public virtual int LT( int i ) - { - return LA( i ); - } - - public virtual int Count - { - get - { - return n; - } - } - - public virtual int Mark() - { - if ( markers == null ) - { - markers = new List<CharStreamState>(); - markers.Add( null ); // depth 0 means no backtracking, leave blank - } - markDepth++; - CharStreamState state = null; - if ( markDepth >= markers.Count ) - { - state = new CharStreamState(); - markers.Add( state ); - } - else - { - state = markers[markDepth]; - } - state.p = Index; - state.line = Line; - state.charPositionInLine = CharPositionInLine; - lastMarker = markDepth; - return markDepth; - } - - public virtual void Rewind( int m ) - { - if (m < 0) - throw new ArgumentOutOfRangeException(); - - //if (m > markDepth) - // throw new ArgumentException(); - - CharStreamState state = markers[m]; - // restore stream state - Seek( state.p ); - line = state.line; - charPositionInLine = state.charPositionInLine; - Release( m ); - } - - public virtual void Rewind() - { - Rewind( lastMarker ); - } - - public virtual void Release( int marker ) - { - // unwind any other markers made after m and release m - markDepth = marker; - // release this marker - markDepth--; - } - - /** <summary> - * consume() ahead until p==index; can't just set p=index as we must - * update line and charPositionInLine. - * </summary> - */ - public virtual void Seek( int index ) - { - if ( index <= p ) - { - p = index; // just jump; don't update stream state (line, ...) - return; - } - // seek forward, consume until p hits index - while ( p < index ) - { - Consume(); - } - } - - public virtual string Substring( int start, int length ) - { - if (start < 0) - throw new ArgumentOutOfRangeException(); - if (length < 0) - throw new ArgumentOutOfRangeException(); - if (start + length > data.Length) - throw new ArgumentException(); - - if (length == 0) - return string.Empty; - - return new string( data, start, length ); - } - - public virtual string SourceName - { - get - { - return name; - } - } - - public override string ToString() - { - return new string(data); - } - } -} |