| /************************************************************************* |
| * |
| * $Id: trionan.h,v 1.9 2005/03/27 18:52:45 breese Exp $ |
| * |
| * Copyright (C) 2001 Bjorn Reese <breese@users.sourceforge.net> |
| * |
| * Permission to use, copy, modify, and distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| * MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND |
| * CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER. |
| * |
| ************************************************************************/ |
| |
| #ifndef TRIO_TRIONAN_H |
| #define TRIO_TRIONAN_H |
| |
| #include "triodef.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #if !defined(TRIO_PUBLIC_NAN) |
| # if !defined(TRIO_PUBLIC) |
| # define TRIO_PUBLIC |
| # endif |
| # define TRIO_PUBLIC_NAN TRIO_PUBLIC |
| #endif |
| |
| enum { |
| TRIO_FP_INFINITE, |
| TRIO_FP_NAN, |
| TRIO_FP_NORMAL, |
| TRIO_FP_SUBNORMAL, |
| TRIO_FP_ZERO |
| }; |
| |
| /************************************************************************* |
| * Dependencies |
| */ |
| |
| #if defined(TRIO_EMBED_NAN) |
| |
| /* |
| * The application that trionan is embedded in must define which functions |
| * it uses. |
| * |
| * The following resolves internal dependencies. |
| */ |
| |
| # if defined(TRIO_FUNC_ISNAN) \ |
| || defined(TRIO_FUNC_ISINF) |
| # if !defined(TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT) |
| # define TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT |
| # endif |
| # endif |
| |
| # if defined(TRIO_FUNC_NAN) |
| # if !defined(TRIO_FUNC_PINF) |
| # define TRIO_FUNC_PINF |
| # endif |
| # endif |
| |
| # if defined(TRIO_FUNC_NINF) |
| # if !defined(TRIO_FUNC_PINF) |
| # define TRIO_FUNC_PINF |
| # endif |
| # endif |
| |
| #else |
| |
| /* |
| * When trionan is not embedded all all functions are defined. |
| */ |
| |
| # define TRIO_FUNC_NAN |
| # define TRIO_FUNC_PINF |
| # define TRIO_FUNC_NINF |
| # define TRIO_FUNC_NZERO |
| # define TRIO_FUNC_ISNAN |
| # define TRIO_FUNC_ISINF |
| # define TRIO_FUNC_ISFINITE |
| # define TRIO_FUNC_SIGNBIT |
| # define TRIO_FUNC_FPCLASSIFY |
| # define TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT |
| |
| #endif |
| |
| /************************************************************************* |
| * Functions |
| */ |
| |
| /* |
| * Return NaN (Not-a-Number). |
| */ |
| #if defined(TRIO_FUNC_NAN) |
| TRIO_PUBLIC_NAN double |
| trio_nan |
| TRIO_PROTO((void)); |
| #endif |
| |
| /* |
| * Return positive infinity. |
| */ |
| #if defined(TRIO_FUNC_PINF) |
| TRIO_PUBLIC_NAN double |
| trio_pinf |
| TRIO_PROTO((void)); |
| #endif |
| |
| /* |
| * Return negative infinity. |
| */ |
| #if defined(TRIO_FUNC_NINF) |
| TRIO_PUBLIC_NAN double |
| trio_ninf |
| TRIO_PROTO((void)); |
| #endif |
| |
| /* |
| * Return negative zero. |
| */ |
| #if defined(TRIO_FUNC_NZERO) |
| TRIO_PUBLIC_NAN double |
| trio_nzero |
| TRIO_PROTO((TRIO_NOARGS)); |
| #endif |
| |
| /* |
| * If number is a NaN return non-zero, otherwise return zero. |
| */ |
| #if defined(TRIO_FUNC_ISNAN) |
| TRIO_PUBLIC_NAN int |
| trio_isnan |
| TRIO_PROTO((double number)); |
| #endif |
| |
| /* |
| * If number is positive infinity return 1, if number is negative |
| * infinity return -1, otherwise return 0. |
| */ |
| #if defined(TRIO_FUNC_ISINF) |
| TRIO_PUBLIC_NAN int |
| trio_isinf |
| TRIO_PROTO((double number)); |
| #endif |
| |
| /* |
| * If number is finite return non-zero, otherwise return zero. |
| */ |
| #if defined(TRIO_FUNC_ISFINITE) |
| TRIO_PUBLIC_NAN int |
| trio_isfinite |
| TRIO_PROTO((double number)); |
| #endif |
| |
| #if defined(TRIO_FUNC_SIGNBIT) |
| TRIO_PUBLIC_NAN int |
| trio_signbit |
| TRIO_PROTO((double number)); |
| #endif |
| |
| #if defined(TRIO_FUNC_FPCLASSIFY) |
| TRIO_PUBLIC_NAN int |
| trio_fpclassify |
| TRIO_PROTO((double number)); |
| #endif |
| |
| #if defined(TRIO_FUNC_FPCLASSIFY_AND_SIGNBIT) |
| TRIO_PUBLIC_NAN int |
| trio_fpclassify_and_signbit |
| TRIO_PROTO((double number, int *is_negative)); |
| #endif |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* TRIO_TRIONAN_H */ |