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(ViewStream): use ArcView.Frame as backend.

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This commit is contained in:
morkt
2016-02-07 19:18:44 +04:00
parent 89e7d14a97
commit 9b90903100
1 changed files with 12 additions and 10 deletions
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22
ArcFormats/NScripter/EncryptedStream.cs
View File

@@ -33,21 +33,23 @@ namespace GameRes.Formats.NScripter
{ {
public class ViewStream : Stream public class ViewStream : Stream
{ {
protected ArcView m_file; protected ArcView.Frame m_view;
protected long m_position = 0; protected long m_position = 0;
protected long m_max_offset;
bool m_should_dispose; bool m_should_dispose;
public ViewStream (ArcView mmap, bool leave_open = false) public ViewStream (ArcView mmap, bool leave_open = false)
{ {
m_file = mmap; m_view = mmap.CreateFrame();
m_max_offset = mmap.MaxOffset;
m_should_dispose = !leave_open; m_should_dispose = !leave_open;
} }
public override int Read (byte[] buf, int index, int count) public override int Read (byte[] buf, int index, int count)
{ {
if (m_position >= m_file.MaxOffset) if (m_position >= m_max_offset)
return 0; return 0;
int read = m_file.View.Read (m_position, buf, index, (uint)count); int read = m_view.Read (m_position, buf, index, (uint)count);
m_position += read; m_position += read;
return read; return read;
} }
@@ -57,7 +59,7 @@ namespace GameRes.Formats.NScripter
public override bool CanWrite { get { return false; } } public override bool CanWrite { get { return false; } }
public override bool CanSeek { get { return true; } } public override bool CanSeek { get { return true; } }
public override long Length { get { return m_file.MaxOffset; } } public override long Length { get { return m_max_offset; } }
public override long Position public override long Position
{ {
get { return m_position; } get { return m_position; }
@@ -69,7 +71,7 @@ namespace GameRes.Formats.NScripter
if (SeekOrigin.Current == whence) if (SeekOrigin.Current == whence)
m_position += pos; m_position += pos;
else if (SeekOrigin.End == whence) else if (SeekOrigin.End == whence)
m_position = m_file.MaxOffset + pos; m_position = m_max_offset + pos;
else else
m_position = pos; m_position = pos;
return m_position; return m_position;
@@ -96,8 +98,8 @@ namespace GameRes.Formats.NScripter
{ {
if (!m_disposed) if (!m_disposed)
{ {
if (disposing && m_should_dispose) if (disposing)
m_file.Dispose(); m_view.Dispose();
m_disposed = true; m_disposed = true;
base.Dispose(); base.Dispose();
} }
@@ -127,13 +129,13 @@ namespace GameRes.Formats.NScripter
{ {
int total_read = 0; int total_read = 0;
bool refill_buffer = !(m_position >= m_current_block_position && m_position < m_current_block_position + m_current_block_length); bool refill_buffer = !(m_position >= m_current_block_position && m_position < m_current_block_position + m_current_block_length);
while (count > 0 && m_position < m_file.MaxOffset) while (count > 0 && m_position < m_max_offset)
{ {
if (refill_buffer) if (refill_buffer)
{ {
int block_num = (int)(m_position / BlockLength); int block_num = (int)(m_position / BlockLength);
m_current_block_position = m_position & ~((long)BlockLength-1); m_current_block_position = m_position & ~((long)BlockLength-1);
m_current_block_length = m_file.View.Read (m_current_block_position, m_current_block, 0, (uint)BlockLength); m_current_block_length = m_view.Read (m_current_block_position, m_current_block, 0, (uint)BlockLength);
DecryptBlock (block_num); DecryptBlock (block_num);
} }
int src_offset = (int)m_position & (BlockLength-1); int src_offset = (int)m_position & (BlockLength-1);