/**
* Compresses one stream to another.
*
* @returns Exit code.
* @param phVfsSrc The input stream. Set to NIL if closed.
* @param pOpts The options.
* @param phVfsDst The output stream. Set to NIL if closed.
*/
static RTEXITCODE gzipCompressFile(PRTVFSIOSTREAM phVfsSrc, PCRTGZIPCMDOPTS pOpts, PRTVFSIOSTREAM phVfsDst)
{
/*
* Attach the ompressor to the output stream.
*/
RTVFSIOSTREAM hVfsGzip;
int rc = RTZipGzipCompressIoStream(*phVfsDst, 0 /*fFlags*/, pOpts->uLevel, &hVfsGzip);
if (RT_FAILURE(rc))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "RTZipGzipCompressIoStream failed: %Rrc", rc);
uint32_t cRefs = RTVfsIoStrmRelease(*phVfsDst);
Assert(cRefs > 0); RT_NOREF_PV(cRefs);
*phVfsDst = hVfsGzip;
return gzipPushFlushAndClose(phVfsSrc, pOpts, phVfsDst);
}
/**
* @interface_method_impl{RTVFSCHAINELEMENTREG,pfnInstantiate}
*/
static DECLCALLBACK(int) rtVfsChainGzip_Instantiate(PCRTVFSCHAINELEMENTREG pProviderReg, PCRTVFSCHAINSPEC pSpec,
PCRTVFSCHAINELEMSPEC pElement, RTVFSOBJ hPrevVfsObj,
PRTVFSOBJ phVfsObj, uint32_t *poffError, PRTERRINFO pErrInfo)
{
RT_NOREF(pProviderReg, pSpec, pElement, poffError, pErrInfo);
AssertReturn(hPrevVfsObj != NIL_RTVFSOBJ, VERR_VFS_CHAIN_IPE);
RTVFSIOSTREAM hVfsIosOut = RTVfsObjToIoStream(hPrevVfsObj);
if (hVfsIosOut == NIL_RTVFSIOSTREAM)
return VERR_VFS_CHAIN_CAST_FAILED;
RTVFSIOSTREAM hVfsIos = NIL_RTVFSIOSTREAM;
int rc = RTZipGzipCompressIoStream(hVfsIosOut, 0 /*fFlags*/, pElement->uProvider, &hVfsIos);
RTVfsObjFromIoStream(hVfsIosOut);
if (RT_SUCCESS(rc))
{
*phVfsObj = RTVfsObjFromIoStream(hVfsIos);
RTVfsIoStrmRelease(hVfsIos);
if (*phVfsObj != NIL_RTVFSOBJ)
return VINF_SUCCESS;
rc = VERR_VFS_CHAIN_CAST_FAILED;
}
return rc;
}
