static int rtTarAppendZeros(PRTTARFILEINTERNAL pFileInt, uint64_t cbSize)
{
/* Allocate a temporary buffer for copying the tar content in blocks. */
size_t cbTmp = 0;
void *pvTmp = rtTarMemTmpAlloc(&cbTmp);
if (!pvTmp)
return VERR_NO_MEMORY;
RT_BZERO(pvTmp, cbTmp);
int rc = VINF_SUCCESS;
uint64_t cbAllWritten = 0;
size_t cbWritten = 0;
for (;;)
{
if (cbAllWritten >= cbSize)
break;
size_t cbToWrite = RT_MIN(cbSize - cbAllWritten, cbTmp);
rc = RTTarFileWriteAt(pFileInt, pFileInt->offCurrent, pvTmp, cbToWrite, &cbWritten);
if (RT_FAILURE(rc))
break;
cbAllWritten += cbWritten;
}
RTMemTmpFree(pvTmp);
return rc;
}
static int tarWriteSyncCallback(void *pvUser, void *pvStorage, uint64_t uOffset,
const void *pvBuf, size_t cbWrite, size_t *pcbWritten)
{
/* Validate input. */
AssertPtrReturn(pvUser, VERR_INVALID_POINTER);
AssertPtrReturn(pvStorage, VERR_INVALID_POINTER);
PTARSTORAGEINTERNAL pInt = (PTARSTORAGEINTERNAL)pvStorage;
DEBUG_PRINT_FLOW();
return RTTarFileWriteAt(pInt->file, uOffset, pvBuf, cbWrite, pcbWritten);
}
