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ISHEX.C
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1986-05-18
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768b
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22 lines
/* 1.0 07-26-85 */
/************************************************************************
* Robert C. Tausworthe *
* Jet Propulsion Laboratory *
* Pasadena, CA 91009 1985 *
************************************************************************/
#include "defs.h"
#include "stdtyp.h"
#include "ctype.h"
/************************************************************************/
BOOL
ishex(c) /* returns true if c is a hex number, 0-9, a-f. */
/*----------------------------------------------------------------------*/
int c;
{
c = TOUPPER(c);
return (ISDIGIT(c) OR ('A' <= c AND c <= 'F'));
}