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(LimitStream): added 'Fill' option.
fills stream with zeroes if underlying stream has less length than requested.
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parent
d35f790994
commit
64e1ae3946
@ -249,6 +249,12 @@ namespace GameRes.Formats
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}
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}
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public enum StreamOption
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{
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None,
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Fill,
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}
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/// <summary>
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/// Limits underlying stream to the first N bytes.
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/// </summary>
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@ -257,6 +263,7 @@ namespace GameRes.Formats
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bool m_can_seek;
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long m_position;
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long m_last;
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bool m_fill;
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public LimitStream (Stream input, long last, bool leave_open = false) : base (input, leave_open)
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{
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@ -265,6 +272,20 @@ namespace GameRes.Formats
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m_last = last;
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}
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public LimitStream (Stream input, long last, StreamOption option, bool leave_open = false)
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: this (input, last, leave_open)
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{
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if (StreamOption.Fill == option)
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{
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if (m_can_seek && input.Length < m_last)
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{
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input.Position = m_position;
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m_can_seek = false;
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}
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m_fill = true;
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}
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}
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public override bool CanSeek { get { return m_can_seek; } }
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public override long Length { get { return m_last; } }
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@ -276,6 +297,13 @@ namespace GameRes.Formats
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return 0;
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count = (int)Math.Min (count, m_last - m_position);
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int read = BaseStream.Read (buffer, offset, count);
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if (m_fill)
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{
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while (read < count)
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{
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buffer[read++] = 0;
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}
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}
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m_position += read;
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return read;
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}
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