Bjorn Reese | 4502960 | 2001-08-21 09:23:53 +0000 | [diff] [blame] | 1 | /************************************************************************* |
| 2 | * |
| 3 | * $Id$ |
| 4 | * |
| 5 | * Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net> |
| 6 | * |
| 7 | * Permission to use, copy, modify, and distribute this software for any |
| 8 | * purpose with or without fee is hereby granted, provided that the above |
| 9 | * copyright notice and this permission notice appear in all copies. |
| 10 | * |
| 11 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| 12 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| 13 | * MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND |
| 14 | * CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER. |
| 15 | * |
| 16 | ************************************************************************/ |
| 17 | |
Bjorn Reese | 026d29f | 2002-01-19 15:40:18 +0000 | [diff] [blame] | 18 | #ifndef TRIO_NAN_H |
| 19 | #define TRIO_NAN_H |
| 20 | |
| 21 | #include "triodef.h" |
Bjorn Reese | 4502960 | 2001-08-21 09:23:53 +0000 | [diff] [blame] | 22 | |
| 23 | #ifdef __cplusplus |
| 24 | extern "C" { |
| 25 | #endif |
Daniel Veillard | 21458c8 | 2002-03-27 16:12:22 +0000 | [diff] [blame] | 26 | |
| 27 | enum { |
| 28 | TRIO_FP_INFINITE, |
| 29 | TRIO_FP_NAN, |
| 30 | TRIO_FP_NORMAL, |
| 31 | TRIO_FP_SUBNORMAL, |
| 32 | TRIO_FP_ZERO |
| 33 | }; |
| 34 | |
Bjorn Reese | 4502960 | 2001-08-21 09:23:53 +0000 | [diff] [blame] | 35 | /* |
| 36 | * Return NaN (Not-a-Number). |
| 37 | */ |
Bjorn Reese | 026d29f | 2002-01-19 15:40:18 +0000 | [diff] [blame] | 38 | TRIO_PUBLIC double trio_nan(void); |
Bjorn Reese | 4502960 | 2001-08-21 09:23:53 +0000 | [diff] [blame] | 39 | |
| 40 | /* |
| 41 | * Return positive infinity. |
| 42 | */ |
Bjorn Reese | 026d29f | 2002-01-19 15:40:18 +0000 | [diff] [blame] | 43 | TRIO_PUBLIC double trio_pinf(void); |
Bjorn Reese | 4502960 | 2001-08-21 09:23:53 +0000 | [diff] [blame] | 44 | |
| 45 | /* |
| 46 | * Return negative infinity. |
| 47 | */ |
Bjorn Reese | 026d29f | 2002-01-19 15:40:18 +0000 | [diff] [blame] | 48 | TRIO_PUBLIC double trio_ninf(void); |
Bjorn Reese | 4502960 | 2001-08-21 09:23:53 +0000 | [diff] [blame] | 49 | |
| 50 | /* |
| 51 | * If number is a NaN return non-zero, otherwise return zero. |
| 52 | */ |
Bjorn Reese | 026d29f | 2002-01-19 15:40:18 +0000 | [diff] [blame] | 53 | TRIO_PUBLIC int trio_isnan(double number); |
Bjorn Reese | 4502960 | 2001-08-21 09:23:53 +0000 | [diff] [blame] | 54 | |
| 55 | /* |
| 56 | * If number is positive infinity return 1, if number is negative |
| 57 | * infinity return -1, otherwise return 0. |
| 58 | */ |
Bjorn Reese | 026d29f | 2002-01-19 15:40:18 +0000 | [diff] [blame] | 59 | TRIO_PUBLIC int trio_isinf(double number); |
Bjorn Reese | 4502960 | 2001-08-21 09:23:53 +0000 | [diff] [blame] | 60 | |
Daniel Veillard | 21458c8 | 2002-03-27 16:12:22 +0000 | [diff] [blame] | 61 | /* |
| 62 | * If number is finite return non-zero, otherwise return zero. |
| 63 | */ |
| 64 | TRIO_PUBLIC int trio_isfinite(double number); |
| 65 | |
| 66 | TRIO_PUBLIC int trio_signbit(double number); |
| 67 | |
| 68 | TRIO_PUBLIC int trio_fpclassify(double number); |
| 69 | |
| 70 | TRIO_PUBLIC double trio_nzero(void); |
| 71 | |
Bjorn Reese | 4502960 | 2001-08-21 09:23:53 +0000 | [diff] [blame] | 72 | #ifdef __cplusplus |
| 73 | } |
| 74 | #endif |
| 75 | |
Bjorn Reese | 026d29f | 2002-01-19 15:40:18 +0000 | [diff] [blame] | 76 | #endif /* TRIO_NAN_H */ |