From 5ceb003a24a95616e6018cd0b92b4781410ac1a7 Mon Sep 17 00:00:00 2001
From: Vincent Povirk <vincent@codeweavers.com>
Date: Wed, 10 Mar 2010 15:03:35 -0600
Subject: [PATCH] ole32: Remove knowledge of block sizes from the BigBlockFile
 object.

We can't determine the correct block size until we read the header, and we
can't create the BigBlockFile until we know the correct block size. To
solve this dilemma, have StorageImpl calculate the file size it needs instead
of asking the BigBlockFile to "ensure a big block exists".
---
 dlls/ole32/stg_bigblockfile.c | 24 +++++-------------------
 dlls/ole32/storage32.c        |  5 +++--
 dlls/ole32/storage32.h        |  3 +--
 3 files changed, 9 insertions(+), 23 deletions(-)

diff --git a/dlls/ole32/stg_bigblockfile.c b/dlls/ole32/stg_bigblockfile.c
index 4aa302649fb..77abbf6286b 100644
--- a/dlls/ole32/stg_bigblockfile.c
+++ b/dlls/ole32/stg_bigblockfile.c
@@ -93,7 +93,6 @@ struct BigBlockFile
 {
     BOOL fileBased;
     ULARGE_INTEGER filesize;
-    ULONG blocksize;
     HANDLE hfile;
     HANDLE hfilemap;
     DWORD flProtect;
@@ -658,7 +657,7 @@ static HRESULT ImplBIGBLOCKFILE_WriteAt(
  * and the blocks in use list.
  */
 BigBlockFile *BIGBLOCKFILE_Construct(HANDLE hFile, ILockBytes* pLkByt, DWORD openFlags,
-                                     ULONG blocksize, BOOL fileBased)
+                                     BOOL fileBased)
 {
     BigBlockFile *This;
 
@@ -669,7 +668,6 @@ BigBlockFile *BIGBLOCKFILE_Construct(HANDLE hFile, ILockBytes* pLkByt, DWORD ope
 
     This->fileBased = fileBased;
     This->flProtect = BIGBLOCKFILE_GetProtectMode(openFlags);
-    This->blocksize = blocksize;
 
     This->maplist = NULL;
     This->victimhead = NULL;
@@ -812,31 +810,19 @@ static HRESULT BIGBLOCKFILE_GetSize(BigBlockFile *This, ULARGE_INTEGER *size)
 }
 
 /******************************************************************************
- *      BIGBLOCKFILE_EnsureExists
+ *      BIGBLOCKFILE_Expand
  *
- * Grows the file if necessary to make sure the block is valid.
+ * Grows the file to the specified size if necessary.
  */
-HRESULT BIGBLOCKFILE_EnsureExists(BigBlockFile *This, ULONG index)
+HRESULT BIGBLOCKFILE_Expand(BigBlockFile *This, ULARGE_INTEGER newSize)
 {
     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)) > size.QuadPart)
-    {
-        ULARGE_INTEGER newSize;
-
-        newSize.QuadPart = This->blocksize * (index + 1);
+    if (newSize.QuadPart > size.QuadPart)
         hr = BIGBLOCKFILE_SetSize(This, newSize);
-    }
     return hr;
 }
diff --git a/dlls/ole32/storage32.c b/dlls/ole32/storage32.c
index fefacb11e6e..6ee60a18ce8 100644
--- a/dlls/ole32/storage32.c
+++ b/dlls/ole32/storage32.c
@@ -2639,7 +2639,6 @@ static HRESULT StorageImpl_Construct(
   This->bigBlockFile   = BIGBLOCKFILE_Construct(hFile,
                                                 pLkbyt,
                                                 openFlags,
-                                                This->bigBlockSize,
                                                 fileBased);
 
   if (This->bigBlockFile == 0)
@@ -2855,6 +2854,7 @@ static ULONG StorageImpl_GetNextFreeBigBlock(
   ULONG nextBlockIndex    = BLOCK_SPECIAL;
   int   depotIndex        = 0;
   ULONG freeBlock         = BLOCK_UNUSED;
+  ULARGE_INTEGER neededSize;
 
   depotIndex = This->prevFreeBlock / blocksPerDepot;
   depotBlockOffset = (This->prevFreeBlock % blocksPerDepot) * sizeof(ULONG);
@@ -2968,7 +2968,8 @@ static ULONG StorageImpl_GetNextFreeBigBlock(
   /*
    * make sure that the block physically exists before using it
    */
-  BIGBLOCKFILE_EnsureExists(This->bigBlockFile, freeBlock);
+  neededSize.QuadPart = StorageImpl_GetBigBlockOffset(This, freeBlock)+This->bigBlockSize;
+  BIGBLOCKFILE_Expand(This->bigBlockFile, neededSize);
 
   This->prevFreeBlock = freeBlock;
 
diff --git a/dlls/ole32/storage32.h b/dlls/ole32/storage32.h
index 9e57e30b9e2..fad5d7766f7 100644
--- a/dlls/ole32/storage32.h
+++ b/dlls/ole32/storage32.h
@@ -161,10 +161,9 @@ typedef struct BigBlockFile BigBlockFile,*LPBIGBLOCKFILE;
 BigBlockFile*  BIGBLOCKFILE_Construct(HANDLE hFile,
                                       ILockBytes* pLkByt,
                                       DWORD openFlags,
-                                      ULONG blocksize,
                                       BOOL fileBased);
 void           BIGBLOCKFILE_Destructor(LPBIGBLOCKFILE This);
-HRESULT        BIGBLOCKFILE_EnsureExists(LPBIGBLOCKFILE This, ULONG index);
+HRESULT        BIGBLOCKFILE_Expand(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
 HRESULT        BIGBLOCKFILE_SetSize(LPBIGBLOCKFILE This, ULARGE_INTEGER newSize);
 HRESULT        BIGBLOCKFILE_ReadAt(LPBIGBLOCKFILE This, ULARGE_INTEGER offset,
            void* buffer, ULONG size, ULONG* bytesRead);