minix/lib/ack/libp/wrr.c
2009-11-09 10:26:00 +00:00

67 lines
1.2 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 *_ecvt();
#define PREC_DIG 80 /* maximum digits produced by _ecvt() */
_wsr(w,r,f) int w; double r; struct file *f; {
char *p,*b; int s,d,i; char buf[PREC_DIG+7];
if (w < 0) _trp(EWIDTH);
p = buf;
if ((i = w-6) < 2)
i = 2;
b = _ecvt(r,i,&d,&s);
*p++ = s? '-' : ' ';
if (*b == '0')
d++;
*p++ = *b++;
*p++ = '.';
while (--i > 0)
*p++ = *b++;
*p++ = 'e';
d--;
if (d < 0) {
d = -d;
*p++ = '-';
} else
*p++ = '+';
if (d >= 1000) {
*p++ = '*';
*p++ = '*';
*p++ = '*';
}
else {
*p++ = '0' + d/100;
*p++ = '0' + (d/10) % 10;
*p++ = '0' + d%10;
}
_wstrin(w,(int)(p-buf),buf,f);
}
_wrr(r,f) double r; struct file *f; {
_wsr(13,r,f);
}