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/* $Id: FileStream.h,v 1.4 2009/06/03 01:10:56 ellson Exp $ $Revision: 1.4 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2008 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
#ifndef GV_FILESTREAM_H
#define GV_FILESTREAM_H
#include <stdio.h>
#include <sys/stat.h>
#include <objbase.h>
class FileStream : public IStream
{
public:
static IStream *Create(char* name, FILE *file);
/* IUnknown methods */
virtual HRESULT STDMETHODCALLTYPE QueryInterface(
REFIID riid,
void **ppvObject);
virtual ULONG STDMETHODCALLTYPE AddRef();
virtual ULONG STDMETHODCALLTYPE Release();
/* ISequentialStream methods */
virtual HRESULT STDMETHODCALLTYPE Read(
void *pv,
ULONG cb,
ULONG *pcbRead);
virtual HRESULT STDMETHODCALLTYPE Write(
const void *pv,
ULONG cb,
ULONG *pcbWritten);
/* IStream methods */
virtual HRESULT STDMETHODCALLTYPE Seek(
LARGE_INTEGER dlibMove,
DWORD dwOrigin,
ULARGE_INTEGER *plibNewPosition);
virtual HRESULT STDMETHODCALLTYPE SetSize(
ULARGE_INTEGER libNewSize);
virtual HRESULT STDMETHODCALLTYPE CopyTo(
IStream *pstm,
ULARGE_INTEGER cb,
ULARGE_INTEGER *pcbRead,
ULARGE_INTEGER *pcbWritten);
virtual HRESULT STDMETHODCALLTYPE Commit(
DWORD grfCommitFlags);
virtual HRESULT STDMETHODCALLTYPE Revert();
virtual HRESULT STDMETHODCALLTYPE LockRegion(
ULARGE_INTEGER libOffset,
ULARGE_INTEGER cb,
DWORD dwLockType);
virtual HRESULT STDMETHODCALLTYPE UnlockRegion(
ULARGE_INTEGER libOffset,
ULARGE_INTEGER cb,
DWORD dwLockType);
virtual HRESULT STDMETHODCALLTYPE Stat(
STATSTG *pstatstg,
DWORD grfStatFlag);
virtual HRESULT STDMETHODCALLTYPE Clone(
IStream **ppstm);
private:
FileStream(char *name, FILE *file);
static void UnixTimeToFileTime(time_t unixTime, FILETIME &fileTime);
ULONG _ref;
char *_name;
FILE *_file;
};
#endif
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