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|
/*
|
| $Id: plfilesink.cpp,v 1.8 2004/11/09 15:55:06 artcom Exp $
| File "Data Sink" Class
|
| This class a file as a destination for picture data.
|
| Copyright (c) 1996-2002 Ulrich von Zadow
|
\--------------------------------------------------------------------
*/
#include "plfilesink.h"
#include "pldebug.h"
#include "plexcept.h"
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN /* Prevent including <winsock*.h> in <windows.h> */
#define VC_EXTRALEAN // Exclude rarely-used stuff from Windows headers
#include <windows.h>
#endif
PLFileSink::PLFileSink ()
: PLDataSink (),
#ifdef PL_FILE_MAPPING
m_hf (INVALID_HANDLE_VALUE), // File handle.
m_hm (NULL), // Handle to file-mapping object.
#else
m_pFile (NULL),
#endif
m_pDataBuf (NULL)
{
}
PLFileSink::~PLFileSink ()
{
#ifdef PL_FILE_MAPPING
if (m_hf && m_hf != INVALID_HANDLE_VALUE)
Close();
#else
if (m_pFile)
Close();
#endif
}
int PLFileSink::Open (const char * pszFName, int MaxFileSize)
{
#ifdef PL_FILE_MAPPING
// Use memory-mapped files
m_hf = CreateFileA (pszFName, GENERIC_READ | GENERIC_WRITE, 0, NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,
NULL);
if (m_hf == INVALID_HANDLE_VALUE)
{
m_hf = NULL;
return getLastPLError();
}
m_hm = CreateFileMapping (m_hf, NULL, PAGE_READWRITE, 0, MaxFileSize, NULL);
if (m_hm == NULL)
{
if (m_hf) CloseHandle (m_hf);
m_hf = NULL;
return PL_ERRACCESS_DENIED;
}
m_pDataBuf = (PLBYTE *) MapViewOfFile (m_hm, FILE_MAP_WRITE, 0, 0, 0);
PLDataSink::Open(pszFName, m_pDataBuf, MaxFileSize);
return 0;
#else
// Generic code assuming memory mapped files are not available.
// we could actually open the file in "Close()",
// but if e.g we cannot create it, it's pointless to proceed
if ((m_pFile = fopen (pszFName, "wb")) &&
(m_pDataBuf = new PLBYTE [MaxFileSize]))
{
PLDataSink::Open(pszFName, m_pDataBuf, MaxFileSize);
return 0;
}
else
return -1;
#endif
}
#ifdef _WIN32
// Opening wide filenames can't be done in ANSI-C++ so we
// require WinAPI file-mappings.
int PLFileSink::OpenW (const wchar_t * pszwFName, int MaxFileSize)
{
m_hf = CreateFileW (pszwFName, GENERIC_READ | GENERIC_WRITE, 0, NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_SEQUENTIAL_SCAN,
NULL);
if (m_hf == INVALID_HANDLE_VALUE)
{
m_hf = NULL;
return getLastPLError();
}
m_hm = CreateFileMapping (m_hf, NULL, PAGE_READWRITE, 0, MaxFileSize, NULL);
if (m_hm == NULL)
{
if (m_hf) CloseHandle (m_hf);
m_hf = NULL;
return PL_ERRACCESS_DENIED;
}
m_pDataBuf = (PLBYTE *) MapViewOfFile (m_hm, FILE_MAP_WRITE, 0, 0, 0);
PLDataSink::OpenW(pszwFName, m_pDataBuf, MaxFileSize);
return 0;
}
#endif
// now flush the data to disk
void PLFileSink::Close ()
{
#ifdef PL_FILE_MAPPING
UnmapViewOfFile (m_pStartData);
CloseHandle (m_hm);
m_hm = NULL;
::SetFilePointer(m_hf,GetDataSize(),0,FILE_BEGIN);
::SetEndOfFile(m_hf); //Truncate the file to the right size
CloseHandle (m_hf);
m_hf = NULL;
#else
int towrite = GetDataSize();
int written = fwrite( m_pStartData, 1, towrite, m_pFile );
PLASSERT( written == towrite );
fclose( m_pFile );
m_pFile = 0;
if (m_pDataBuf)
{
delete[] m_pDataBuf;
m_pDataBuf = NULL;
}
#endif
PLDataSink::Close();
}
#ifdef _WIN32
int PLFileSink::getLastPLError()
{
switch (GetLastError())
{
case ERROR_PATH_NOT_FOUND:
// sprintf (sz, "Path not found.", pszFName);
return PL_ERRPATH_NOT_FOUND;
case ERROR_FILE_NOT_FOUND:
// sprintf (sz, "File not found.", pszFName);
return PL_ERRFILE_NOT_FOUND;
case ERROR_ACCESS_DENIED:
// sprintf (sz, "Access denied.", pszFName);
return PL_ERRACCESS_DENIED;
case ERROR_SHARING_VIOLATION:
// sprintf (sz, "Sharing violation.", pszFName);
return PL_ERRACCESS_DENIED;
default:
// sprintf (sz, "CreateFile returned %d.",
// pszFName, GetLastError());
return PL_ERRFILE_NOT_FOUND;
}
}
#endif
/*
/--------------------------------------------------------------------
|
| $Log: plfilesink.cpp,v $
| Revision 1.8 2004/11/09 15:55:06 artcom
| changed #ifdef _WINDOWS to #ifdef _WIN32 (since this is a macro that actually is predefined on win32 platforms)
|
| Revision 1.7 2004/09/11 12:50:52 uzadow
| Linux build fixes.
|
| Revision 1.6 2004/09/11 12:41:35 uzadow
| removed plstdpch.h
|
| Revision 1.5 2003/08/03 12:36:55 uzadow
| Added unicode support; fixed some header includes.
|
| Revision 1.4 2003/08/03 12:03:20 uzadow
| Added unicode support; fixed some header includes.
|
| Revision 1.3 2002/03/31 13:36:41 uzadow
| Updated copyright.
|
| Revision 1.2 2001/10/06 22:37:08 uzadow
| Linux compatibility.
|
| Revision 1.1 2001/09/16 19:03:22 uzadow
| Added global name prefix PL, changed most filenames.
|
| Revision 1.8 2001/02/04 14:31:52 uzadow
| Member initialization list cleanup (Erik Hoffmann).
|
| Revision 1.7 2000/12/20 19:17:46 uzadow
| FileSink::Close() now calls the base class Close() so
| the file sink can be reopened.
|
| Revision 1.6 2000/12/09 12:16:26 uzadow
| Fixed several memory leaks.
|
| Revision 1.5 2000/01/16 20:43:13 anonymous
| Removed MFC dependencies
|
| Revision 1.4 2000/01/10 23:52:59 Ulrich von Zadow
| Changed formatting & removed tabs.
|
| Revision 1.3 1999/10/03 18:50:51 Ulrich von Zadow
| Added automatic logging of changes.
|
|
--------------------------------------------------------------------
*/
|
