68 lines
1.2 KiB
C
68 lines
1.2 KiB
C
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/* $Header$ */
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/*
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* (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
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*
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* This product is part of the Amsterdam Compiler Kit.
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*
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* Permission to use, sell, duplicate or disclose this software must be
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* obtained in writing. Requests for such permissions may be sent to
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*
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* Dr. Andrew S. Tanenbaum
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* Wiskundig Seminarium
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* Vrije Universiteit
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* Postbox 7161
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* 1007 MC Amsterdam
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* The Netherlands
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*
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*/
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/* Author: J.W. Stevenson */
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#include <pc_err.h>
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#include <pc_file.h>
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extern _wstrin();
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extern char *_ecvt();
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#define PREC_DIG 80 /* maximum digits produced by _ecvt() */
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_wsr(w,r,f) int w; double r; struct file *f; {
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char *p,*b; int s,d,i; char buf[PREC_DIG+7];
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if (w < 0) _trp(EWIDTH);
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p = buf;
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if ((i = w-6) < 2)
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i = 2;
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b = _ecvt(r,i,&d,&s);
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*p++ = s? '-' : ' ';
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if (*b == '0')
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d++;
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*p++ = *b++;
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*p++ = '.';
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while (--i > 0)
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*p++ = *b++;
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*p++ = 'e';
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d--;
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if (d < 0) {
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d = -d;
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*p++ = '-';
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} else
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*p++ = '+';
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if (d >= 1000) {
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*p++ = '*';
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*p++ = '*';
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*p++ = '*';
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}
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else {
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*p++ = '0' + d/100;
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*p++ = '0' + (d/10) % 10;
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*p++ = '0' + d%10;
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}
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_wstrin(w,(int)(p-buf),buf,f);
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}
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_wrr(r,f) double r; struct file *f; {
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_wsr(13,r,f);
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}
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