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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Microsoft Public License. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Microsoft Public License, please send an email to
* ironruby@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Microsoft Public License.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.IO;
using System.Text;
using IronRuby.Builtins;
using Microsoft.Scripting.Utils;
namespace IronRuby.StandardLibrary.Yaml {
internal class MutableStringReader : TextReader {
private readonly MutableString/*!*/ _str;
private int _pos = 0;
internal MutableStringReader(MutableString/*!*/ str) {
Assert.NotNull(str);
_str = str;
}
public override int Peek() {
return _str.GetChar(_pos);
}
public override int Read() {
return _pos < _str.Length ? _str.GetChar(_pos++) : -1;
}
public override int Read(char[]/*!*/ buffer, int index, int count) {
int read = _str.Length - _pos;
if (read > 0) {
if (read > count) {
read = count;
}
_str.ConvertToString().CopyTo(_pos, buffer, index, read);
_pos += read;
}
return read;
}
}
}
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