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BizHawk
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This commit is contained in:
zeromus 2014-10-12 04:19:01 +00:00
parent 4eeb48db13
commit 9430b9f206
1 changed files with 17 additions and 1 deletions
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18
BizHawk.Common/SwitcherStream.cs
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@ -1,3 +1,4 @@
using System;
using System.IO;
namespace BizHawk.Common
@ -18,6 +19,11 @@ namespace BizHawk.Common
{
}
/// <summary>
/// if this is enabled, seeks to Begin,0 will get ignored; anything else will be an exception
/// </summary>
public bool DenySeekHack = false;
public override bool CanRead { get { return _currStream.CanRead; } }
public override bool CanSeek { get { return _currStream.CanSeek; } }
public override bool CanWrite { get { return _currStream.CanWrite; } }
@ -33,7 +39,12 @@ namespace BizHawk.Common
set
{
_currStream.Position = Position;
if (DenySeekHack)
{
if (value == 0) return;
else throw new InvalidOperationException("Cannot set position to non-zero in a SwitcherStream with DenySeekHack=true");
}
_currStream.Position = value;
}
}
@ -54,6 +65,11 @@ namespace BizHawk.Common
public override long Seek(long offset, SeekOrigin origin)
{
if (DenySeekHack)
{
if (offset == 0 && origin == SeekOrigin.Begin) return 0;
else throw new InvalidOperationException("Cannot call Seek with non-zero offset or non-Begin origin in a SwitcherStream with DenySeekHack=true");
}
return _currStream.Seek(offset, origin);
}