some refactoring on <StgHeader>

(cherry picked from commit 9c3ef4ee)

Conflicts:
	sot/source/sdstor/stgelem.cxx

Change-Id: I3f826dc98af5ad5cee5c2566006ab405f0730c3c

sot/source/sdstor/stgelem.cxx

@@ -110,7 +110,7 @@ void StgHeader::Init()
 
     SetTOCStart( STG_EOF );
     SetDataFATStart( STG_EOF );
-    for( short i = 0; i < 109; i++ )
+    for( short i = 0; i < cFATPagesInHeader; i++ )
         SetFATPage( i, STG_FREE );
 }
 
@@ -145,7 +145,7 @@ sal_Bool StgHeader::Load( SvStream& r )
       >> nDataFATSize               // 40 # of data FATpages
       >> nMasterChain               // 44 chain to the next master block
       >> nMaster;                   // 48 # of additional master blocks
-    for( short i = 0; i < 109; i++ )
+    for( short i = 0; i < cFATPagesInHeader; i++ )
         r >> nMasterFAT[ i ];
 
     return ( r.GetErrorCode() == ERRCODE_NONE && Check() );
@@ -172,7 +172,7 @@ sal_Bool StgHeader::Store( StgIo& rIo )
       << nDataFATSize               // 40 # of data FAT pages
       << nMasterChain               // 44 chain to the next master block
       << nMaster;                   // 48 # of additional master blocks
-    for( short i = 0; i < 109; i++ )
+    for( short i = 0; i < cFATPagesInHeader; i++ )
         r << nMasterFAT[ i ];
     bDirty = !rIo.Good();
     return sal_Bool( !bDirty );
@@ -209,7 +209,7 @@ sal_Bool StgHeader::Check()
 
 sal_Int32 StgHeader::GetFATPage( short n ) const
 {
-    if( n >= 0 && n < 109 )
+    if( n >= 0 && n < cFATPagesInHeader )
         return nMasterFAT[ n ];
     else
         return STG_EOF;
@@ -217,7 +217,7 @@ sal_Int32 StgHeader::GetFATPage( short n ) const
 
 void StgHeader::SetFATPage( short n, sal_Int32 nb )
 {
-    if( n >= 0 && n < 109 )
+    if( n >= 0 && n < cFATPagesInHeader )
     {
         if( nMasterFAT[ n ] != nb )
             bDirty = sal_True, nMasterFAT[ n ] = nb;

sot/source/sdstor/stgelem.hxx

@@ -36,8 +36,10 @@ SvStream& operator<<( SvStream&, const ClsId& );
 
 class StgHeader
 {
+    static const sal_uInt8 cFATPagesInHeader = 109;
+
     sal_uInt8   cSignature[ 8 ];            // 00 signature (see below)
-    ClsId   aClsId;                     // 08 Class ID
+    ClsId       aClsId;                     // 08 Class ID
     sal_Int32   nVersion;                   // 18 version number
     sal_uInt16  nByteOrder;                 // 1C Unicode byte order indicator
     sal_Int16   nPageSize;                  // 1E 1 << nPageSize = block size
@@ -52,7 +54,7 @@ class StgHeader
     sal_Int32   nDataFATSize;               // 40 # of data fat blocks
     sal_Int32   nMasterChain;               // 44 chain to the next master block
     sal_Int32   nMaster;                    // 48 # of additional master blocks
-    sal_Int32   nMasterFAT[ 109 ];          // 4C first 109 master FAT pages
+    sal_Int32   nMasterFAT[ cFATPagesInHeader ];            // 4C first [cFATPagesInHeader] master FAT pages
 public:
     StgHeader();
 
@@ -61,23 +63,23 @@ public:
     sal_Bool  Load( SvStream& );
     sal_Bool  Store( StgIo& );
     sal_Bool  Check();                      // check the signature and version
-    short GetByteOrder() const          { return nByteOrder;    }
-    sal_Int32 GetTOCStart() const           { return nTOCstrm;      }
+    short GetByteOrder() const          { return nByteOrder; }
+    sal_Int32 GetTOCStart() const           { return nTOCstrm; }
     void  SetTOCStart( sal_Int32 n );
-    sal_Int32 GetDataFATStart() const       { return nDataFAT;      }
+    sal_Int32 GetDataFATStart() const       { return nDataFAT; }
     void  SetDataFATStart( sal_Int32 n );
-    sal_Int32 GetDataFATSize() const        { return nDataFATSize;  }
+    sal_Int32 GetDataFATSize() const        { return nDataFATSize; }
     void  SetDataFATSize( sal_Int32 n );
-    sal_Int32 GetThreshold() const          { return nThreshold;    }
-    short GetPageSize() const           { return nPageSize;     }
+    sal_Int32 GetThreshold() const          { return nThreshold; }
+    short GetPageSize() const           { return nPageSize; }
     short GetDataPageSize() const       { return nDataPageSize; }
-    sal_Int32 GetFATSize() const            { return nFATSize;      }
+    sal_Int32 GetFATSize() const            { return nFATSize; }
     void  SetFATSize( sal_Int32 n );
-    sal_Int32 GetFATChain() const           { return nMasterChain;  }
+    sal_Int32 GetFATChain() const           { return nMasterChain; }
     void  SetFATChain( sal_Int32 n );
-    sal_Int32 GetMasters() const            { return nMaster;       }
+    sal_Int32 GetMasters() const            { return nMaster; }
     void  SetMasters( sal_Int32 n );
-    short GetFAT1Size() const           { return 109;           }
+    short GetFAT1Size() const           { return cFATPagesInHeader; }
     const ClsId& GetClassId() const     { return aClsId;        }
     sal_Int32 GetFATPage( short ) const;
     void  SetFATPage( short, sal_Int32 );