69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
|
/* $Header$ */
|
||
|
|
/*
|
||
|
|
* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
|
||
|
|
*
|
||
|
|
* This product is part of the Amsterdam Compiler Kit.
|
||
|
|
*
|
||
|
|
* Permission to use, sell, duplicate or disclose this software must be
|
||
|
|
* obtained in writing. Requests for such permissions may be sent to
|
||
|
|
*
|
||
|
|
* Dr. Andrew S. Tanenbaum
|
||
|
|
* Wiskundig Seminarium
|
||
|
|
* Vrije Universiteit
|
||
|
|
* Postbox 7161
|
||
|
|
* 1007 MC Amsterdam
|
||
|
|
* The Netherlands
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Author: J.W. Stevenson */
|
||
|
|
|
||
|
|
#include <pc_err.h>
|
||
|
|
#include <pc_file.h>
|
||
|
|
|
||
|
|
extern _wstrin();
|
||
|
|
extern char *_fcvt();
|
||
|
|
|
||
|
|
#define assert(x) /* nothing */
|
||
|
|
|
||
|
|
#if __STDC__
|
||
|
|
#include <float.h>
|
||
|
|
#define HUGE_DIG DBL_MAX_10_EXP /* log10(maxreal) */
|
||
|
|
#else
|
||
|
|
#define HUGE_DIG 400 /* log10(maxreal) */
|
||
|
|
#endif
|
||
|
|
#define PREC_DIG 80 /* the maximum digits returned by _fcvt() */
|
||
|
|
#define FILL_CHAR '0' /* char printed if all of _fcvt() used */
|
||
|
|
#define BUFSIZE HUGE_DIG + PREC_DIG + 3
|
||
|
|
|
||
|
|
_wrf(n,w,r,f) int n,w; double r; struct file *f; {
|
||
|
|
char *p,*b; int s,d; char buf[BUFSIZE];
|
||
|
|
|
||
|
|
if ( n < 0 || w < 0) _trp(EWIDTH);
|
||
|
|
p = buf;
|
||
|
|
if (n > PREC_DIG)
|
||
|
|
n = PREC_DIG;
|
||
|
|
b = _fcvt(r,n,&d,&s);
|
||
|
|
assert(abs(d) <= HUGE_DIG);
|
||
|
|
if (s)
|
||
|
|
*p++ = '-';
|
||
|
|
if (d<=0)
|
||
|
|
*p++ = '0';
|
||
|
|
else
|
||
|
|
do
|
||
|
|
*p++ = (*b ? *b++ : FILL_CHAR);
|
||
|
|
while (--d > 0);
|
||
|
|
if (n > 0)
|
||
|
|
*p++ = '.';
|
||
|
|
while (++d <= 0) {
|
||
|
|
if (--n < 0)
|
||
|
|
break;
|
||
|
|
*p++ = '0';
|
||
|
|
}
|
||
|
|
while (--n >= 0) {
|
||
|
|
*p++ = (*b ? *b++ : FILL_CHAR);
|
||
|
|
assert(p <= buf+BUFSIZE);
|
||
|
|
}
|
||
|
|
_wstrin(w,(int)(p-buf),buf,f);
|
||
|
|
}
|