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83 lines
2.1 KiB
83 lines
2.1 KiB
/**************************************************************** |
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The author of this software is David M. Gay. |
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Copyright (C) 1998, 2000 by Lucent Technologies |
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All Rights Reserved |
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Permission to use, copy, modify, and distribute this software and |
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its documentation for any purpose and without fee is hereby |
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granted, provided that the above copyright notice appear in all |
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copies and that both that the copyright notice and this |
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permission notice and warranty disclaimer appear in supporting |
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documentation, and that the name of Lucent or any of its entities |
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not be used in advertising or publicity pertaining to |
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distribution of the software without specific, written prior |
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permission. |
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LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. |
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IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY |
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER |
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IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, |
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF |
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THIS SOFTWARE. |
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****************************************************************/ |
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/* Please send bug reports to |
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David M. Gay |
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Bell Laboratories, Room 2C-463 |
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600 Mountain Avenue |
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Murray Hill, NJ 07974-0636 |
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U.S.A. |
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dmg@bell-labs.com |
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*/ |
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#include "gdtoaimp.h" |
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int |
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#ifdef KR_headers |
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strtopf(s, sp, f) CONST char *s; char **sp; float *f; |
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#else |
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strtopf(CONST char *s, char **sp, float *f) |
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#endif |
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{ |
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#ifdef Sudden_Underflow |
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static FPI fpi = { 24, 1-127-24+1, 254-127-24+1, 1, 1 }; |
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#else |
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static FPI fpi = { 24, 1-127-24+1, 254-127-24+1, 1, 0 }; |
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#endif |
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ULong bits[1], *L; |
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Long exp; |
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int k; |
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k = strtodg(s, sp, &fpi, &exp, bits); |
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L = (ULong*)f; |
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switch(k & STRTOG_Retmask) { |
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case STRTOG_NoNumber: |
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case STRTOG_Zero: |
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L[0] = 0; |
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break; |
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case STRTOG_Normal: |
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case STRTOG_NaNbits: |
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L[0] = bits[0] & 0x7fffff | exp + 0x7f + 23 << 23; |
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break; |
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case STRTOG_Denormal: |
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L[0] = bits[0]; |
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break; |
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case STRTOG_Infinite: |
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L[0] = 0x7f800000; |
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break; |
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case STRTOG_NaN: |
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L[0] = 0x7fffffff; |
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} |
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if (k & STRTOG_Neg) |
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L[0] |= 0x80000000L; |
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return k; |
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}
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