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MSB.C
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─────Run-Time Library───────────────────────────────────────────────────────
/* MSB.C illustrates conversion between IEEE floating-point format
* and MS Binary format. Functions illustrated include:
* _fieeetomsbin _fmsbintoieee _dieeetomsbin _dmsbintoieee
*
* Only _fieeetomsbin is specifically used, but the others work the same.
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char *binstr32( unsigned long num, char *buffer ); /* Prototype */
void main()
{
union
{
float f; /* As float */
unsigned long ul; /* As unsigned long (for binary conversion) */
} msbin, ieee;
char tmpmsbin[33], tmpieee[33];
/* Convert an IEEE number to MS binary and show the result in binary. */
ieee.f = 4.352;
if( _fieeetomsbin( &ieee.f, &msbin.f ) )
{
printf( "Can't convert\n" );
exit( 1 );
}
/* Convert to binary string. */
binstr32( msbin.ul, tmpmsbin );
binstr32( ieee.ul, tmpieee );
printf( "%f in MS Binary format:\t%32s\n", ieee.f, tmpmsbin );
printf( "%f in IEEE format:\t%32s\n", ieee.f, tmpieee );
exit( 0 );
}
/* Converts unsigned long to string of 32 binary characters. */
char *binstr32( unsigned long num, char *buffer )
{
char tmp[33];
unsigned long len;
memset( buffer, '0', 32 );
len = strlen( _ultoa( num, tmp, 2 ) );
strcpy( buffer + 32 - len, tmp );
return buffer;
}
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