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Write files in such a way that a program crash, system crash, powerdown,

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etc. won't cause data loss if we're running on a journalling filesystem.
This commit is contained in:
Glenn Maynard
2003-12-21 07:23:29 +00:00
parent 50f5ddc5ea
commit 20792a51bb
10 changed files with 178 additions and 38 deletions
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stepmania/src/RageFile.cpp
+27 -10
View File
@@ -25,7 +25,7 @@ RageFile::RageFile()
m_FilePos = 0;
}
RageFile::RageFile( const CString& path, RageFile::OpenMode mode )
RageFile::RageFile( const CString& path, int mode )
{
m_File = NULL;
m_BufUsed = 0;
@@ -57,10 +57,9 @@ CString RageFile::GetPath() const
return m_File->GetDisplayPath();
}
bool RageFile::Open( const CString& path, RageFile::OpenMode mode )
bool RageFile::Open( const CString& path, int mode )
{
ASSERT( FILEMAN );
Close();
m_Path = path;
@@ -71,6 +70,18 @@ bool RageFile::Open( const CString& path, RageFile::OpenMode mode )
m_FilePos = 0;
ResetBuf();
if( (m_Mode&READ) && (m_Mode&WRITE) )
{
SetError( "Reading and writing are mutually exclusive" );
return false;
}
if( !(m_Mode&READ) && !(m_Mode&WRITE) )
{
SetError( "Neither reading nor writing specified" );
return false;
}
int error;
m_File = FILEMAN->Open( path, mode, *this, error );
@@ -104,7 +115,7 @@ int RageFile::GetLine( CString &out )
if ( !IsOpen() )
RageException::Throw("\"%s\" is not open.", m_Path.c_str());
if( m_Mode != READ )
if( !(m_Mode&READ) )
RageException::Throw("\"%s\" is not open for reading", GetPath().c_str());
bool GotData = false;
@@ -209,7 +220,7 @@ int RageFile::Read( void *buffer, size_t bytes )
if( !IsOpen() )
RageException::Throw("\"%s\" is not open.", GetPath().c_str());
if( m_Mode != READ )
if( !(m_Mode&READ) )
RageException::Throw("\"%s\" is not open for reading", GetPath().c_str());
int ret = 0;
@@ -244,7 +255,7 @@ int RageFile::Seek( int offset )
if( !IsOpen() )
RageException::Throw("\"%s\" is not open.", GetPath().c_str());
if( m_Mode != READ )
if( !(m_Mode&READ) )
RageException::Throw("\"%s\" is not open for reading; can't seek", GetPath().c_str());
m_EOF = false;
@@ -284,7 +295,7 @@ int RageFile::SeekCur( int offset )
if( !IsOpen() )
RageException::Throw("\"%s\" is not open.", GetPath().c_str());
if( m_Mode != READ )
if( !(m_Mode&READ) )
RageException::Throw("\"%s\" is not open for reading; can't seek", GetPath().c_str());
if( !offset || m_EOF )
@@ -312,7 +323,7 @@ int RageFile::GetFileSize()
if( !IsOpen() )
RageException::Throw("\"%s\" is not open.", GetPath().c_str());
if( m_Mode != READ )
if( !(m_Mode&READ) )
RageException::Throw("\"%s\" is not open for reading; can't GetFileSize", GetPath().c_str());
return m_File->GetFileSize();
@@ -323,7 +334,7 @@ void RageFile::Rewind()
if( !IsOpen() )
RageException::Throw("\"%s\" is not open.", GetPath().c_str());
if( m_Mode != READ )
if( !(m_Mode&READ) )
RageException::Throw("\"%s\" is not open for reading; can't GetFileSize", GetPath().c_str());
m_EOF = false;
@@ -347,7 +358,7 @@ int RageFile::Write( const void *buffer, size_t bytes )
if( !IsOpen() )
RageException::Throw("\"%s\" is not open.", GetPath().c_str());
if( m_Mode != WRITE )
if( !(m_Mode&WRITE) )
RageException::Throw("\"%s\" is not open for writing", GetPath().c_str());
return m_File->Write( buffer, bytes );
@@ -365,6 +376,12 @@ int RageFile::Write( const void *buffer, size_t bytes, int nmemb )
int RageFile::Flush()
{
if( !m_File )
{
SetError( "Not open" );
return -1;
}
return m_File->Flush();
}