www.pudn.com > 8255_code_lib.rar > SCNVFN01.C

/*- 
 *  ---------------------------------------------------------------------- 
 *  File        :   SCNVFN01.C 
 *  Creator     :   Blake Miller 
 *  Version     :   01.00.00            February 1991 
 *  Language    :   Microsoft Quick C   Version 2.0 
 *  Purpose     :   String Conversion Function 
 *              :   Convert Unsigned Long, Unsigned Int, or Unsigned Char 
 *              :   to a 'Binary' string. 
 *  ---------------------------------------------------------------------- 
 */ 
 
void scv_uvtobs ( void *data, char *s, 
				  int msbit, int lsbit, 
				  int schar, int cchar ); 
 
/*- Binary String Converter ------------------** 
 *  Convert from a number into a 'binary' string. 
 *  That is, convert a byte, int, or long into a string 
 *  with a specified character for the '1' level and 
 *  another character for the logical '0' level. 
 */ 
void scv_uvtobs (void *data, char *s, int msbit, int lsbit, 
				 int schar, int cchar ) 
	{ 
	unsigned long   mask;   /* bit select mask  */ 
	unsigned long   sbit;   /* start bit        */ 
	unsigned long   ebit;   /* end bit          */ 
	unsigned long   ltmp;   /* temporary long   */ 
 
	ltmp = * (unsigned long *) data;    /* get data into long   */ 
	*s = 0;                             /* clear string         */ 
	sbit = 0x01;                        /* set start bit        */ 
	sbit = sbit << msbit;               /* initialize position  */ 
	ebit = 0x01;                        /* set end bit          */ 
	ebit = ebit << lsbit;               /* initialize position  */ 
 
	for ( mask = sbit; mask >= ebit; mask = (mask >> 1) ){ 
		if ( ltmp & mask )  *s = (char) schar;  /* set   character  */ 
		else                *s = (char) cchar;  /* clear character  */ 
		s++;                                    /* next string byte */ 
		} 
	*s = 0;                                     /* EOS for string   */ 
	} 
 
/*- 
 *  ---------------------------------------------------------------------- 
 *  END SCNVFN01.C Source File 
 *  ---------------------------------------------------------------------- 
 */