78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
|
/* $NetBSD: strtopf.c,v 1.2 2008/03/21 23:13:48 christos Exp $ */
|
||
|
|
|
||
|
|
/****************************************************************
|
||
|
|
|
||
|
|
The author of this software is David M. Gay.
|
||
|
|
|
||
|
|
Copyright (C) 1998, 2000 by Lucent Technologies
|
||
|
|
All Rights Reserved
|
||
|
|
|
||
|
|
Permission to use, copy, modify, and distribute this software and
|
||
|
|
its documentation for any purpose and without fee is hereby
|
||
|
|
granted, provided that the above copyright notice appear in all
|
||
|
|
copies and that both that the copyright notice and this
|
||
|
|
permission notice and warranty disclaimer appear in supporting
|
||
|
|
documentation, and that the name of Lucent or any of its entities
|
||
|
|
not be used in advertising or publicity pertaining to
|
||
|
|
distribution of the software without specific, written prior
|
||
|
|
permission.
|
||
|
|
|
||
|
|
LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
||
|
|
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
|
||
|
|
IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
|
||
|
|
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
|
||
|
|
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
|
||
|
|
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
|
||
|
|
THIS SOFTWARE.
|
||
|
|
|
||
|
|
****************************************************************/
|
||
|
|
|
||
|
|
/* Please send bug reports to David M. Gay (dmg at acm dot org,
|
||
|
|
* with " at " changed at "@" and " dot " changed to "."). */
|
||
|
|
|
||
|
|
#include "gdtoaimp.h"
|
||
|
|
|
||
|
|
int
|
||
|
|
#ifdef KR_headers
|
||
|
|
strtopf(s, sp, f) CONST char *s; char **sp; float *f;
|
||
|
|
#else
|
||
|
|
strtopf(CONST char *s, char **sp, float *f)
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
static FPI fpi = { 24, 1-127-24+1, 254-127-24+1, 1, SI };
|
||
|
|
ULong bits[1], *L;
|
||
|
|
Long exp;
|
||
|
|
int k;
|
||
|
|
|
||
|
|
k = strtodg(s, sp, &fpi, &exp, bits);
|
||
|
|
if (k == STRTOG_NoMemory)
|
||
|
|
return k;
|
||
|
|
L = (ULong*)f;
|
||
|
|
switch(k & STRTOG_Retmask) {
|
||
|
|
case STRTOG_NoNumber:
|
||
|
|
case STRTOG_Zero:
|
||
|
|
L[0] = 0;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case STRTOG_Normal:
|
||
|
|
case STRTOG_NaNbits:
|
||
|
|
L[0] = bits[0] & 0x7fffff | exp + 0x7f + 23 << 23;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case STRTOG_Denormal:
|
||
|
|
L[0] = bits[0];
|
||
|
|
break;
|
||
|
|
|
||
|
|
case STRTOG_Infinite:
|
||
|
|
L[0] = 0x7f800000;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case STRTOG_NaN:
|
||
|
|
L[0] = f_QNAN;
|
||
|
|
}
|
||
|
|
if (k & STRTOG_Neg)
|
||
|
|
L[0] |= 0x80000000L;
|
||
|
|
return k;
|
||
|
|
}
|