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/* $Id: pkzip.cpp $ */
/** @file
* IPRT - PKZIP archive I/O.
*/
/*
* Copyright (C) 2014-2019 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 *
*********************************************************************************************************************************/
#include <iprt/zip.h>
#include <iprt/file.h>
#include <iprt/err.h>
#include <iprt/fs.h>
#include <iprt/mem.h>
#include <iprt/string.h>
#include <iprt/vfs.h>
#include <iprt/vfslowlevel.h>
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/**
* Memory stream private data.
*/
typedef struct MEMIOSTREAM
{
/** Size of the memory buffer. */
size_t cbBuf;
/** Pointer to the memory buffer. */
uint8_t *pu8Buf;
/** Current offset. */
size_t off;
} MEMIOSTREAM;
typedef MEMIOSTREAM *PMEMIOSTREAM;
/**
* @interface_method_impl{RTVFSOBJOPS,pfnClose}
*/
static DECLCALLBACK(int) memFssIos_Close(void *pvThis)
{
NOREF(pvThis);
return VINF_SUCCESS;
}
/**
* @interface_method_impl{RTVFSOBJOPS,pfnQueryInfo}
*/
static DECLCALLBACK(int) memFssIos_QueryInfo(void *pvThis, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAddAttr)
{
PMEMIOSTREAM pThis = (PMEMIOSTREAM)pvThis;
switch (enmAddAttr)
{
case RTFSOBJATTRADD_NOTHING:
case RTFSOBJATTRADD_UNIX:
RT_ZERO(*pObjInfo);
pObjInfo->cbObject = pThis->cbBuf;
break;
default:
return VERR_NOT_SUPPORTED;
}
return VINF_SUCCESS;
}
/**
* @interface_method_impl{RTVFSIOSTREAMOPS,pfnRead}
*/
static DECLCALLBACK(int) memFssIos_Read(void *pvThis, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbRead)
{
PMEMIOSTREAM pThis = (PMEMIOSTREAM)pvThis;
Assert(pSgBuf->cSegs == 1);
RT_NOREF_PV(fBlocking);
if (off < 0)
off = pThis->off;
if (off >= (RTFOFF)pThis->cbBuf)
return pcbRead ? VINF_EOF : VERR_EOF;
size_t cbLeft = pThis->cbBuf - off;
size_t cbToRead = pSgBuf->paSegs[0].cbSeg;
if (cbToRead > cbLeft)
{
if (!pcbRead)
return VERR_EOF;
cbToRead = (size_t)cbLeft;
}
memcpy(pSgBuf->paSegs[0].pvSeg, pThis->pu8Buf + off, cbToRead);
pThis->off = off + cbToRead;
if (pcbRead)
*pcbRead = cbToRead;
return VINF_SUCCESS;
}
/**
* @interface_method_impl{RTVFSIOSTREAMOPS,pfnWrite}
*/
static DECLCALLBACK(int) memFssIos_Write(void *pvThis, RTFOFF off, PCRTSGBUF pSgBuf, bool fBlocking, size_t *pcbWritten)
{
RT_NOREF_PV(pvThis); RT_NOREF_PV(off); RT_NOREF_PV(pSgBuf); RT_NOREF_PV(fBlocking); RT_NOREF_PV(pcbWritten);
return VERR_NOT_IMPLEMENTED;
}
/**
* @interface_method_impl{RTVFSIOSTREAMOPS,pfnFlush}
*/
static DECLCALLBACK(int) memFssIos_Flush(void *pvThis)
{
RT_NOREF_PV(pvThis);
return VERR_NOT_IMPLEMENTED;
}
/**
* @interface_method_impl{RTVFSIOSTREAMOPS,pfnPollOne}
*/
static DECLCALLBACK(int) memFssIos_PollOne(void *pvThis, uint32_t fEvents, RTMSINTERVAL cMillies, bool fIntr, uint32_t *pfRetEvents)
{
RT_NOREF_PV(pvThis); RT_NOREF_PV(fEvents); RT_NOREF_PV(cMillies); RT_NOREF_PV(fIntr); RT_NOREF_PV(pfRetEvents);
return VERR_NOT_IMPLEMENTED;
}
/**
* @interface_method_impl{RTVFSIOSTREAMOPS,pfnTell}
*/
static DECLCALLBACK(int) memFssIos_Tell(void *pvThis, PRTFOFF poffActual)
{
PMEMIOSTREAM pThis = (PMEMIOSTREAM)pvThis;
*poffActual = pThis->off;
return VINF_SUCCESS;
}
/**
* Memory I/O object stream operations.
*/
static const RTVFSIOSTREAMOPS g_memFssIosOps =
{
{ /* Obj */
RTVFSOBJOPS_VERSION,
RTVFSOBJTYPE_IO_STREAM,
"MemFsStream::IoStream",
memFssIos_Close,
memFssIos_QueryInfo,
RTVFSOBJOPS_VERSION
},
RTVFSIOSTREAMOPS_VERSION,
RTVFSIOSTREAMOPS_FEAT_NO_SG,
memFssIos_Read,
memFssIos_Write,
memFssIos_Flush,
memFssIos_PollOne,
memFssIos_Tell,
NULL /*Skip*/,
NULL /*ZeroFill*/,
RTVFSIOSTREAMOPS_VERSION
};
RTDECL(int) RTZipPkzipMemDecompress(void **ppvDst, size_t *pcbDst, const void *pvSrc, size_t cbSrc, const char *pszObject)
{
PMEMIOSTREAM pIosData;
RTVFSIOSTREAM hVfsIos;
int rc = RTVfsNewIoStream(&g_memFssIosOps,
sizeof(*pIosData),
RTFILE_O_READ | RTFILE_O_DENY_WRITE | RTFILE_O_OPEN,
NIL_RTVFS,
NIL_RTVFSLOCK,
&hVfsIos,
(void **)&pIosData);
if (RT_SUCCESS(rc))
{
pIosData->pu8Buf = (uint8_t*)pvSrc;
pIosData->cbBuf = cbSrc;
pIosData->off = 0;
RTVFSFSSTREAM hVfsFss;
rc = RTZipPkzipFsStreamFromIoStream(hVfsIos, 0 /*fFlags*/, &hVfsFss);
RTVfsIoStrmRelease(hVfsIos);
if (RT_SUCCESS(rc))
{
/*
* Loop through all objects. Actually this wouldn't be required
* for .zip files but we opened it as I/O stream.
*/
for (bool fFound = false; !fFound;)
{
char *pszName;
RTVFSOBJ hVfsObj;
rc = RTVfsFsStrmNext(hVfsFss, &pszName, NULL /*penmType*/, &hVfsObj);
if (RT_FAILURE(rc))
break;
fFound = !strcmp(pszName, pszObject);
if (fFound)
{
RTFSOBJINFO UnixInfo;
rc = RTVfsObjQueryInfo(hVfsObj, &UnixInfo, RTFSOBJATTRADD_UNIX);
if (RT_SUCCESS(rc))
{
size_t cb = UnixInfo.cbObject;
void *pv = RTMemAlloc(cb);
if (pv)
{
RTVFSIOSTREAM hVfsIosObj = RTVfsObjToIoStream(hVfsObj);
if (hVfsIos != NIL_RTVFSIOSTREAM)
{
rc = RTVfsIoStrmRead(hVfsIosObj, pv, cb, true /*fBlocking*/, NULL);
if (RT_SUCCESS(rc))
{
*ppvDst = pv;
*pcbDst = cb;
}
}
else
rc = VERR_INTERNAL_ERROR_4;
if (RT_FAILURE(rc))
RTMemFree(pv);
}
}
}
RTVfsObjRelease(hVfsObj);
RTStrFree(pszName);
}
RTVfsFsStrmRelease(hVfsFss);
}
}
return rc;
}
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