72 lines
1.2 KiB
C
72 lines
1.2 KiB
C
/* $Id$ */
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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.h"
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#define PREC_DIG 80 /* maximum digits produced by _ecvt() */
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void _wsr(int w, double r, struct file* f)
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{
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char *p, *b;
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int s, d, i;
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char buf[PREC_DIG + 7];
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if (w < 0)
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_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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{
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d = -d;
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*p++ = '-';
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}
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else
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*p++ = '+';
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if (d >= 1000)
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{
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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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{
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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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void _wrr(double r, struct file* f)
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{
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_wsr(13, r, f);
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}
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