| 1 | /*************************************************************************
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| 2 | *
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| 3 | * $Id$
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| 4 | *
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| 5 | * Copyright (C) 2001 Bjorn Reese <[email protected]>
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| 6 | *
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| 7 | * Permission to use, copy, modify, and distribute this software for any
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| 8 | * purpose with or without fee is hereby granted, provided that the above
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| 9 | * copyright notice and this permission notice appear in all copies.
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| 10 | *
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| 11 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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| 12 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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| 13 | * MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND
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| 14 | * CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.
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| 15 | *
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| 16 | ************************************************************************/
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| 17 |
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| 18 | #ifndef TRIO_NAN_H
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| 19 | #define TRIO_NAN_H
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| 20 |
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| 21 | #include "triodef.h"
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| 22 |
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| 23 | #ifdef __cplusplus
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| 24 | extern "C" {
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| 25 | #endif
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| 26 |
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| 27 | enum {
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| 28 | TRIO_FP_INFINITE,
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| 29 | TRIO_FP_NAN,
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| 30 | TRIO_FP_NORMAL,
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| 31 | TRIO_FP_SUBNORMAL,
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| 32 | TRIO_FP_ZERO
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| 33 | };
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| 34 |
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| 35 | /*
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| 36 | * Return NaN (Not-a-Number).
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| 37 | */
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| 38 | TRIO_PUBLIC double trio_nan TRIO_PROTO((void));
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| 39 |
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| 40 | /*
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| 41 | * Return positive infinity.
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| 42 | */
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| 43 | TRIO_PUBLIC double trio_pinf TRIO_PROTO((void));
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| 44 |
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| 45 | /*
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| 46 | * Return negative infinity.
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| 47 | */
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| 48 | TRIO_PUBLIC double trio_ninf TRIO_PROTO((void));
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| 49 |
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| 50 | /*
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| 51 | * Return negative zero.
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| 52 | */
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| 53 | TRIO_PUBLIC double trio_nzero TRIO_PROTO((TRIO_NOARGS));
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| 54 |
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| 55 | /*
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| 56 | * If number is a NaN return non-zero, otherwise return zero.
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| 57 | */
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| 58 | TRIO_PUBLIC int trio_isnan TRIO_PROTO((double number));
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| 59 |
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| 60 | /*
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| 61 | * If number is positive infinity return 1, if number is negative
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| 62 | * infinity return -1, otherwise return 0.
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| 63 | */
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| 64 | TRIO_PUBLIC int trio_isinf TRIO_PROTO((double number));
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| 65 |
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| 66 | /*
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| 67 | * If number is finite return non-zero, otherwise return zero.
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| 68 | */
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| 69 | #if 0
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| 70 | /* Temporary fix - these 2 routines not used in libxml */
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| 71 | TRIO_PUBLIC int trio_isfinite TRIO_PROTO((double number));
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| 72 |
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| 73 | TRIO_PUBLIC int trio_fpclassify TRIO_PROTO((double number));
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| 74 | #endif
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| 75 |
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| 76 | TRIO_PUBLIC int trio_signbit TRIO_PROTO((double number));
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| 77 |
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| 78 | TRIO_PUBLIC int trio_fpclassify_and_signbit TRIO_PROTO((double number, int *is_negative));
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| 79 |
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| 80 | #ifdef __cplusplus
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| 81 | }
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| 82 | #endif
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| 83 |
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| 84 | #endif /* TRIO_NAN_H */
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