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mri_equal.c

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00001 #include "mrilib.h"
00002 
00003 /*! Test if 2 images are equal.
00004     Returns 1 if they are, 0 if they are not.  [30 Jun 2003] */
00005 
00006 int mri_equal( MRI_IMAGE *aim , MRI_IMAGE *bim )
00007 {
00008    char *aar , *bar ;
00009    int nn ;
00010 
00011 ENTRY("mri_equal") ;
00012 
00013    if( aim == bim )                                RETURN( 1 );
00014    if( aim == NULL || bim == NULL )                RETURN( 0 );
00015 
00016    if( aim->nvox != bim->nvox )                    RETURN( 0 );
00017    if( aim->kind != bim->kind )                    RETURN( 0 );
00018 
00019    aar = mri_data_pointer(aim) ; if( aar == NULL ) RETURN( 0 );
00020    bar = mri_data_pointer(bim) ; if( bar == NULL ) RETURN( 0 );
00021 
00022    nn = memcmp( aar , bar , aim->nvox * aim->pixel_size ) ;
00023    if( nn != 0 ) nn = 0 ;
00024    else          nn = 1 ;
00025                                                    RETURN( nn);
00026 }
 
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