X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2FgdcmDocument.cxx;h=0b907069e0465b3684389aeb0dd4747898ee550d;hb=9c711bc2285888933edee3221e5c37f01077a2ef;hp=088c4097a16a14f5f98acd1fcd297b78624b7f11;hpb=f558e91ca92b7b2b5820bebc01e000a926d0828f;p=gdcm.git

diff --git a/src/gdcmDocument.cxx b/src/gdcmDocument.cxx
index 088c4097..0b907069 100644
--- a/src/gdcmDocument.cxx
+++ b/src/gdcmDocument.cxx
@@ -3,8 +3,8 @@
   Program:   gdcm
   Module:    $RCSfile: gdcmDocument.cxx,v $
   Language:  C++
-  Date:      $Date: 2005/02/11 16:36:52 $
-  Version:   $Revision: 1.227 $
+  Date:      $Date: 2005/02/14 10:45:04 $
+  Version:   $Revision: 1.230 $
                                                                                 
   Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
   l'Image). All rights reserved. See Doc/License.txt or
@@ -32,15 +32,6 @@
 #include <iomanip>
 #include <fstream>
 
-// For nthos:
-#if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__) 
-   #include <winsock.h>
-#endif
-
-#ifdef CMAKE_HAVE_NETINET_IN_H
-   #include <netinet/in.h>
-#endif
-
 namespace gdcm 
 {
 //-----------------------------------------------------------------------------
@@ -352,7 +343,9 @@ uint16_t Document::SwapShort(uint16_t a)
 {
    if ( SwapCode == 4321 || SwapCode == 2143 )
    {
-      a = ((( a << 8 ) & 0xff00 ) | (( a >> 8 ) & 0x00ff ) );
+      //a = ((( a << 8 ) & 0xff00 ) | (( a >> 8 ) & 0x00ff ) );
+      // Save CPU time
+      a = ( a << 8 ) | ( a >> 8 );
    }
    return a;
 }
@@ -369,11 +362,15 @@ uint32_t Document::SwapLong(uint32_t a)
       case 1234 :
          break;
       case 4321 :
-         a=( ((a<<24) & 0xff000000) | ((a<<8)  & 0x00ff0000) | 
-             ((a>>8)  & 0x0000ff00) | ((a>>24) & 0x000000ff) );
+//         a=( ((a<<24) & 0xff000000) | ((a<<8)  & 0x00ff0000) | 
+//             ((a>>8)  & 0x0000ff00) | ((a>>24) & 0x000000ff) );
+// save CPU time
+         a=( ( a<<24)               | ((a<<8)  & 0x00ff0000) | 
+             ((a>>8)  & 0x0000ff00) |  (a>>24)                );
          break;   
       case 3412 :
-         a=( ((a<<16) & 0xffff0000) | ((a>>16) & 0x0000ffff) );
+//       a=( ((a<<16) & 0xffff0000) | ((a>>16) & 0x0000ffff) );
+         a=( (a<<16)                | (a>>16)  );
          break;  
       case 2143 :
          a=( ((a<< 8) & 0xff00ff00) | ((a>>8) & 0x00ff00ff)  );
@@ -1721,8 +1718,6 @@ bool Document::CheckSwap()
    // 0x00000004. Finding the swap code in then straigthforward. Trouble
    // occurs when we can't find such group...
    
-   uint32_t  x = 4;  // x : for ntohs
-   bool net2host; // true when HostByteOrder is the same as NetworkByteOrder
    uint32_t  s32;
    uint16_t  s16;
        
@@ -1730,14 +1725,7 @@ bool Document::CheckSwap()
     
    // First, compare HostByteOrder and NetworkByteOrder in order to
    // determine if we shall need to swap bytes (i.e. the Endian type).
-   if ( x == ntohs(x) )
-   {
-      net2host = true;
-   }
-   else
-   {
-      net2host = false;
-   }
+   bool net2host = Util::IsCurrentProcessorBigEndian();
          
    // The easiest case is the one of a 'true' DICOM header, we just have
    // to look for the string "DICM" inside the file preamble.