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(PrefixStream): don't seek over unseekable streams.

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This commit is contained in:
morkt 2016-01-15 11:48:50 +04:00
parent 632d4b4602
commit 526904af29
1 changed files with 4 additions and 2 deletions
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6
ArcFormats/ArcCommon.cs
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@ -106,6 +106,8 @@ namespace GameRes.Formats
get { return m_position; }
set
{
if (!m_stream.CanSeek)
throw new NotSupportedException ("Underlying stream does not support Stream.Position property");
m_position = Math.Max (value, 0);
if (m_position > m_header.Length)
{
@ -146,7 +148,7 @@ namespace GameRes.Formats
}
if (count > 0)
{
if (m_header.Length == m_position)
if (m_header.Length == m_position && m_stream.CanSeek)
m_stream.Position = 0;
int stream_read = m_stream.Read (buffer, offset, count);
m_position += stream_read;
@ -159,7 +161,7 @@ namespace GameRes.Formats
{
if (m_position < m_header.Length)
return m_header[m_position++];
if (m_position == m_header.Length)
if (m_position == m_header.Length && m_stream.CanSeek)
m_stream.Position = 0;
int b = m_stream.ReadByte();
if (-1 != b)