diff options
Diffstat (limited to 'mcs/ilasm/scanner/ILReader.cs')
| -rw-r--r-- | mcs/ilasm/scanner/ILReader.cs | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/mcs/ilasm/scanner/ILReader.cs b/mcs/ilasm/scanner/ILReader.cs deleted file mode 100644 index f5832e8f921..00000000000 --- a/mcs/ilasm/scanner/ILReader.cs +++ /dev/null @@ -1,252 +0,0 @@ -// ILReader.cs
-// Author: Sergey Chaban (serge@wildwestsoftware.com)
-
-using System;
-using System.IO;
-using System.Text;
-
-namespace Mono.ILASM {
-
-
- /// <summary>
- /// </summary>
- public class ILReader {
- internal static readonly int CHUNK_SIZE = 4096;
-
- private StreamReader reader;
- private int inUse;
- private int pos;
- private int termPos;
- private Location location;
- private Location markedLocation;
- private char[] buffer;
-
- public ILReader (StreamReader reader)
- {
- this.reader = reader;
- location = new Location ();
- markedLocation = Location.Unknown;
- buffer = new char [CHUNK_SIZE];
- pos = buffer.Length + 1;
- termPos = buffer.Length + 2;
- inUse = 0;
- }
-
-
-
- /// <summary>
- /// </summary>
- public Location Location {
- get {
- return location;
- }
- }
-
-
- /// <summary>
- /// Provides access to underlying StreamReader.
- /// </summary>
- public StreamReader BaseReader {
- get {
- return reader;
- }
- }
-
-
- private void EnsureCapacity (int required, int shift)
- {
- int n = buffer.Length;
-
- if (shift < 0) shift = 0;
-
- if (n < required) {
- for (;n < required; n <<= 1);
- char [] newBuff = new char [n];
- Array.Copy (buffer, 0, newBuff, shift, buffer.Length);
- }
- }
-
- private void EnsureCapacity (int required)
- {
- EnsureCapacity (required, 0);
- }
-
- private int NormalizeEOL (int len)
- {
- if (len <= 0) return -1;
- int n = len;
-
- for (int i = 0, j = 0; i < len; i++, j++) {
- if (buffer [i] == '\r') {
- if (i == len - 1) {
- // strip the very last char
- --n;
- break;
- } else {
- buffer [j] = '\n';
- if (buffer [i + 1] == '\n') {
- i++;
- --n;
- }
- }
- } else if (i != j) {
- buffer [j] = buffer [i];
- }
-
- }
-
- return n;
- }
-
-
-
- private int DoRead (int advance)
- {
- int n = 1;
-
- if (pos == termPos) {
- n = -1;
- } else if (pos >= inUse) {
- pos = 0;
-
- // read as much as possible
- n = reader.Read (buffer, 0, buffer.Length);
- n = NormalizeEOL (n);
-
- // Manually terminate the buffer if we had
- // reached the end of the input stream.
- if (n != -1 && n < buffer.Length) termPos = n + 1;
-
- inUse = n;
- }
-
- int res = -1;
- if (n != -1) {
- res = buffer [pos];
- }
- pos += advance;
-
-
- // Track location
- if (res == '\n') {
- location.NewLine();
- } else {
- location.NextColumn();
- }
-
- return res;
- }
-
-
- /// <summary>
- /// </summary>
- /// <returns></returns>
- public int Read ()
- {
- return DoRead (1);
- }
-
- /// <summary>
- /// </summary>
- /// <returns></returns>
- public int Peek ()
- {
- return DoRead (0);
- }
-
-
- /// <summary>
- /// </summary>
- public void Unread (char c)
- {
- if (pos > 0) {
- if (buffer [pos - 1] == c) {
- --pos;
- } else {
- throw new Exception ("Invalid putback.");
- }
- } else {
- EnsureCapacity (++inUse, 1);
- pos = 0;
- buffer [0] = c;
- }
-
- location.PreviousColumn ();
- }
-
-
- /// <summary>
- /// </summary>
- /// <param name="chars"></param>
- public void Unread (char [] chars)
- {
- int len = chars.Length;
-
- if (len == 0) return;
-
- if (pos >= len) {
- pos -= len;
- } else {
- inUse += len;
- EnsureCapacity (inUse, len);
- pos -= len;
- Array.Copy (chars, 0, buffer, pos, len);
- }
- }
-
- /// <summary>
- /// </summary>
- /// <param name="c"></param>
- public void Unread (int c)
- {
- Unread ((char)c);
- }
-
-
- /// <summary>
- /// </summary>
- public void SkipWhitespace ()
- {
- int ch = Read ();
- for (; ch != -1 && Char.IsWhiteSpace((char) ch); ch = Read ());
- if (ch != -1) Unread (ch);
- }
-
-
- /// <summary>
- /// </summary>
- /// <returns></returns>
- public string ReadToWhitespace ()
- {
- StringBuilder sb = new StringBuilder ();
- int ch = Read ();
- for (; ch != -1 && !Char.IsWhiteSpace((char) ch); sb.Append ((char) ch), ch = Read ());
- if (ch != -1) Unread (ch);
- return sb.ToString ();
- }
-
-
- /// <summary>
- /// </summary>
- public void MarkLocation ()
- {
- if (markedLocation == Location.Unknown) {
- markedLocation = new Location (location);
- } else {
- markedLocation.CopyFrom (location);
- }
- }
-
-
- /// <summary>
- /// </summary>
- public void RestoreLocation ()
- {
- if (markedLocation != Location.Unknown) {
- location.CopyFrom (markedLocation);
- }
- }
-
- }
-
-}
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