From cd2790c9d1a7b065e286e7fafb110a50fb7067d0 Mon Sep 17 00:00:00 2001
From: Mathias Bauer <mba@openoffice.org>
Date: Mon, 16 Oct 2000 13:11:51 +0000
Subject: [PATCH] IsStorageFile without downloading whole file

---
 sot/inc/stg.hxx               |  5 +++--
 sot/source/sdstor/stg.cxx     | 10 ++++++++--
 sot/source/sdstor/stgelem.cxx | 12 +++++++++---
 sot/source/sdstor/stgelem.hxx |  5 +++--
 sot/source/sdstor/storage.cxx |  8 ++++++--
 5 files changed, 29 insertions(+), 11 deletions(-)

diff --git a/sot/inc/stg.hxx b/sot/inc/stg.hxx
index 4e79a9d6e02f..4a823d6b47fe 100644
--- a/sot/inc/stg.hxx
+++ b/sot/inc/stg.hxx
@@ -2,9 +2,9 @@
  *
  *  $RCSfile: stg.hxx,v $
  *
- *  $Revision: 1.1.1.1 $
+ *  $Revision: 1.2 $
  *
- *  last change: $Author: hr $ $Date: 2000-09-18 16:56:50 $
+ *  last change: $Author: mba $ $Date: 2000-10-16 14:05:36 $
  *
  *  The Contents of this file are made available subject to the terms of
  *  either of the following licenses
@@ -132,6 +132,7 @@ public:
                                BOOL bDirect = TRUE );
     ~Storage();
     static BOOL       IsStorageFile( const String & rFileName );
+    static BOOL       IsStorageFile( SvStream* );
     const String&     GetName() const;
     BOOL              IsRoot() const { return bIsRoot; }
 
diff --git a/sot/source/sdstor/stg.cxx b/sot/source/sdstor/stg.cxx
index 2048f4e14c53..ca0d18d0dcd3 100644
--- a/sot/source/sdstor/stg.cxx
+++ b/sot/source/sdstor/stg.cxx
@@ -2,9 +2,9 @@
  *
  *  $RCSfile: stg.cxx,v $
  *
- *  $Revision: 1.2 $
+ *  $Revision: 1.3 $
  *
- *  last change: $Author: mm $ $Date: 2000-10-12 16:18:50 $
+ *  last change: $Author: mba $ $Date: 2000-10-16 14:08:34 $
  *
  *  The Contents of this file are made available subject to the terms of
  *  either of the following licenses
@@ -332,6 +332,12 @@ BOOL Storage::IsStorageFile( const String & rFileName )
     return FALSE;
 }
 
+BOOL Storage::IsStorageFile( SvStream* pStream )
+{
+    StgHeader aHdr;
+    return ( pStream && aHdr.Load( *pStream ) && aHdr.Check() );
+}
+
 // Open the storage file. If writing is permitted and the file is not
 // a storage file, initialize it.
 
diff --git a/sot/source/sdstor/stgelem.cxx b/sot/source/sdstor/stgelem.cxx
index ef568aca861f..4a43cb207147 100644
--- a/sot/source/sdstor/stgelem.cxx
+++ b/sot/source/sdstor/stgelem.cxx
@@ -2,9 +2,9 @@
  *
  *  $RCSfile: stgelem.cxx,v $
  *
- *  $Revision: 1.1.1.1 $
+ *  $Revision: 1.2 $
  *
- *  last change: $Author: hr $ $Date: 2000-09-18 16:56:51 $
+ *  last change: $Author: mba $ $Date: 2000-10-16 14:08:34 $
  *
  *  The Contents of this file are made available subject to the terms of
  *  either of the following licenses
@@ -133,6 +133,12 @@ void StgHeader::Init()
 BOOL StgHeader::Load( StgIo& rIo )
 {
     SvStream& r = *rIo.GetStrm();
+    Load( r );
+    return rIo.Good();
+}
+
+BOOL StgHeader::Load( SvStream& r )
+{
     r.Seek( 0L );
     r.Read( cSignature, 8 );
     r >> aClsId                     // 08 Class ID
@@ -151,7 +157,7 @@ BOOL StgHeader::Load( StgIo& rIo )
       >> nMaster;                   // 48 # of additional master blocks
     for( short i = 0; i < 109; i++ )
         r >> nMasterFAT[ i ];
-    return rIo.Good();
+    return r.GetErrorCode() == ERRCODE_NONE;
 }
 
 BOOL StgHeader::Store( StgIo& rIo )
diff --git a/sot/source/sdstor/stgelem.hxx b/sot/source/sdstor/stgelem.hxx
index 8273eb35b991..47e3e2dde270 100644
--- a/sot/source/sdstor/stgelem.hxx
+++ b/sot/source/sdstor/stgelem.hxx
@@ -2,9 +2,9 @@
  *
  *  $RCSfile: stgelem.hxx,v $
  *
- *  $Revision: 1.1.1.1 $
+ *  $Revision: 1.2 $
  *
- *  last change: $Author: hr $ $Date: 2000-09-18 16:56:51 $
+ *  last change: $Author: mba $ $Date: 2000-10-16 14:08:34 $
  *
  *  The Contents of this file are made available subject to the terms of
  *  either of the following licenses
@@ -106,6 +106,7 @@ public:
     StgHeader();
     void  Init();                       // initialize the header
     BOOL  Load( StgIo& );
+    BOOL  Load( SvStream& );
     BOOL  Store( StgIo& );
     BOOL  Check();                      // check the signature and version
     short GetByteOrder() const          { return nByteOrder;    }
diff --git a/sot/source/sdstor/storage.cxx b/sot/source/sdstor/storage.cxx
index 207d3a5fb103..1fb542a78628 100644
--- a/sot/source/sdstor/storage.cxx
+++ b/sot/source/sdstor/storage.cxx
@@ -2,9 +2,9 @@
  *
  *  $RCSfile: storage.cxx,v $
  *
- *  $Revision: 1.2 $
+ *  $Revision: 1.3 $
  *
- *  last change: $Author: mm $ $Date: 2000-10-12 16:18:51 $
+ *  last change: $Author: mba $ $Date: 2000-10-16 14:08:34 $
  *
  *  The Contents of this file are made available subject to the terms of
  *  either of the following licenses
@@ -562,6 +562,10 @@ BOOL SotStorage::IsStorageFile( const String & rFileName )
     return Storage::IsStorageFile( rFileName );
 }
 
+BOOL SotStorage::IsStorageFile( SvStream* pStream )
+{
+    return Storage::IsStorageFile( pStream );
+}
 /*************************************************************************
 |*    SotStorage::GetStorage()
 |*