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/* $Id: filesystem.cpp $ */
/** @file
* IPRT Filesystem API (Filesystem) - generic code.
*/
/*
* Copyright (C) 2012 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP LOG_GROUP_DEFAULT
#include <iprt/types.h>
#include <iprt/assert.h>
#include <iprt/mem.h>
#include <iprt/filesystem.h>
#include <iprt/err.h>
#include <iprt/asm.h>
#include <iprt/string.h>
#include <iprt/list.h>
#include "internal/filesystem.h"
/*******************************************************************************
* Global variables *
*******************************************************************************/
/**
* Supported volume formats.
*/
static PCRTFILESYSTEMDESC g_aFsFmts[] =
{
&g_rtFsExt
};
static int rtFsGetFormat(RTVFSFILE hVfsFile, PCRTFILESYSTEMDESC *ppFsDesc)
{
int rc = VINF_SUCCESS;
uint32_t uScoreMax = RTFILESYSTEM_MATCH_SCORE_UNSUPPORTED;
PCRTFILESYSTEMDESC pFsFmtMatch = NULL;
for (unsigned i = 0; i < RT_ELEMENTS(g_aFsFmts); i++)
{
uint32_t uScore;
PCRTFILESYSTEMDESC pFsFmt = g_aFsFmts[i];
rc = pFsFmt->pfnProbe(hVfsFile, &uScore);
if ( RT_SUCCESS(rc)
&& uScore > uScoreMax)
{
pFsFmtMatch = pFsFmt;
uScoreMax = uScore;
}
else if (RT_FAILURE(rc))
break;
}
if (RT_SUCCESS(rc))
{
if (uScoreMax > RTFILESYSTEM_MATCH_SCORE_UNSUPPORTED)
{
AssertPtr(pFsFmtMatch);
*ppFsDesc = pFsFmtMatch;
}
else
rc = VERR_NOT_SUPPORTED;
}
return rc;
}
RTDECL(int) RTFilesystemVfsFromFile(RTVFSFILE hVfsFile, PRTVFS phVfs)
{
int rc = VINF_SUCCESS;
PCRTFILESYSTEMDESC pFsDesc = NULL;
RTVFS hVfs = NIL_RTVFS;
void *pvThis = NULL;
AssertPtrReturn(hVfsFile, VERR_INVALID_HANDLE);
AssertPtrReturn(phVfs, VERR_INVALID_POINTER);
rc = rtFsGetFormat(hVfsFile, &pFsDesc);
if (RT_SUCCESS(rc))
{
rc = RTVfsNew(&pFsDesc->VfsOps, pFsDesc->cbFs, NIL_RTVFS, NIL_RTVFSLOCK,
&hVfs, &pvThis);
if (RT_SUCCESS(rc))
{
rc = pFsDesc->pfnInit(pvThis, hVfsFile);
if (RT_SUCCESS(rc))
*phVfs = hVfs;
else
RTVfsRelease(hVfs);
}
}
return rc;
}
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