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ole32: Add a helper function to return the file size and modify EnsureExists to use it.

This commit is contained in:
Huw Davies 2009-01-27 17:13:28 +00:00 committed by Alexandre Julliard
parent cc7edbe3b5
commit bfc32ae0c6
2 changed files with 31 additions and 10 deletions
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37
dlls/ole32/stg_bigblockfile.c
View File

@ -827,10 +827,12 @@ HRESULT BIGBLOCKFILE_WriteAt(BigBlockFile *This, ULARGE_INTEGER offset,
* Sets the size of the file.
*
*/
void BIGBLOCKFILE_SetSize(BigBlockFile *This, ULARGE_INTEGER newSize)
HRESULT BIGBLOCKFILE_SetSize(BigBlockFile *This, ULARGE_INTEGER newSize)
{
HRESULT hr = S_OK;
if (This->filesize.u.LowPart == newSize.u.LowPart)
return;
return hr;
TRACE("from %u to %u\n", This->filesize.u.LowPart, newSize.u.LowPart);
@ -882,6 +884,20 @@ void BIGBLOCKFILE_SetSize(BigBlockFile *This, ULARGE_INTEGER newSize)
This->filesize.u.HighPart = newSize.u.HighPart;
BIGBLOCKFILE_RemapAllMappedPages(This);
return hr;
}
/******************************************************************************
* BIGBLOCKFILE_GetSize
*
* Gets the size of the file.
*
*/
static HRESULT BIGBLOCKFILE_GetSize(BigBlockFile *This, ULARGE_INTEGER *size)
{
HRESULT hr = S_OK;
*size = This->filesize;
return hr;
}
/******************************************************************************
@ -889,22 +905,27 @@ void BIGBLOCKFILE_SetSize(BigBlockFile *This, ULARGE_INTEGER newSize)
*
* Grows the file if necessary to make sure the block is valid.
*/
void BIGBLOCKFILE_EnsureExists(BigBlockFile *This, ULONG index)
HRESULT BIGBLOCKFILE_EnsureExists(BigBlockFile *This, ULONG index)
{
ULARGE_INTEGER size;
HRESULT hr;
/* Block index starts at -1 translate to zero based index */
if (index == 0xffffffff)
index = 0;
else
index++;
hr = BIGBLOCKFILE_GetSize(This, &size);
if(FAILED(hr)) return hr;
/* make sure that the block physically exists */
if ((This->blocksize * (index + 1)) > This->filesize.u.LowPart)
if ((This->blocksize * (index + 1)) > size.QuadPart)
{
ULARGE_INTEGER newSize;
newSize.u.HighPart = 0;
newSize.u.LowPart = This->blocksize * (index + 1);
BIGBLOCKFILE_SetSize(This, newSize);
newSize.QuadPart = This->blocksize * (index + 1);
hr = BIGBLOCKFILE_SetSize(This, newSize);
}
return hr;
}

4
dlls/ole32/storage32.h
View File

@ -164,8 +164,8 @@ BigBlockFile* BIGBLOCKFILE_Construct(HANDLE hFile,
ULONG blocksize,
BOOL fileBased);
void BIGBLOCKFILE_Destructor(LPBIGBLOCKFILE This);
void BIGBLOCKFILE_EnsureExists(LPBIGBLOCKFILE This, ULONG index);
void BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
HRESULT BIGBLOCKFILE_EnsureExists(LPBIGBLOCKFILE This, ULONG index);
HRESULT BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
HRESULT BIGBLOCKFILE_ReadAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
void* buffer, ULONG size, ULONG* bytesRead);
HRESULT BIGBLOCKFILE_WriteAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,