65 lines
1.3 KiB
C#
65 lines
1.3 KiB
C#
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public abstract class CharEnumerator {
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abstract public char Current { get; }
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abstract public bool MoveNext();
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abstract public void Reset();
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abstract public int Location { get; }
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}
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public class String2CharEnumerator : CharEnumerator {
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private string text;
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private int i=-1;
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public String2CharEnumerator(string text) {
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this.text = text;
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}
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override public char Current {
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get {
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try {
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return text[i];
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} catch (System.Exception) {
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throw new System.InvalidOperationException();
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}
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}
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}
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override public int Location {
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get {
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return i;
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}
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}
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override public bool MoveNext() {
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i++;
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return i < text.Length;
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}
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override public void Reset() {}
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}
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public class File2CharEnumerator : CharEnumerator {
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private System.IO.TextReader reader;
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public File2CharEnumerator(System.IO.TextReader reader) {
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this.reader = reader;
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}
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private char _current;
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override public char Current {
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get {
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return _current;
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}
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}
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private int _location = -1;
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override public int Location {
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get {
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return _location;
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}
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}
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override public bool MoveNext() {
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int c = reader.Read();
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if (c == -1)
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return false;
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_location++;
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_current = (char)c;
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return true;
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}
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override public void Reset() {}
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}
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