tgmath

tgmath - /* Copyright (C) 1997, 1998, 1999, 2000, 2001,...

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/* Copyright (C) 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ /* * ISO C99 Standard: 7.22 Type-generic math <tgmath.h> */ #ifndef _TGMATH_H #define _TGMATH_H 1 /* Include the needed headers. */ #include <math.h> #include <complex.h> /* Since `complex' is currently not really implemented in most C compilers and if it is implemented, the implementations differ. This makes it quite difficult to write a generic implementation of this header. We do not try this for now and instead concentrate only on GNU CC. Once we have more information support for other compilers might follow. */ #if __GNUC_PREREQ (2, 7) # ifdef __NO_LONG_DOUBLE_MATH # define __tgml(fct) fct # else # define __tgml(fct) fct ## l # endif /* This is ugly but unless gcc gets appropriate builtins we have to do something like this. Don't ask how it works. */ /* 1 if 'type' is a floating type, 0 if 'type' is an integer type. Allows for _Bool. Expands to an integer constant expression. */ # if __GNUC_PREREQ (3, 1) # define __floating_type(type) \ (__builtin_classify_type ((type) 0) == 8 \ || (__builtin_classify_type ((type) 0) == 9 \ # else # # endif
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/* The tgmath real type for T, where E is 0 if T is an integer type and 1 for a floating type. */ # define __tgmath_real_type_sub(T, E) \ __typeof__ (*(0 ? (__typeof__ (0 ? (double *) 0 : (void *) (E))) 0 \ : (__typeof__ (0 ? (T *) 0 : (void *) (!(E)))) 0)) /* The tgmath real type of EXPR. */ # define __tgmath_real_type(expr) \ __tgmath_real_type_sub (__typeof__ ((__typeof__ (expr)) 0), \ __floating_type (__typeof__ (expr))) /* We have two kinds of generic macros: to support functions which are only defined on real valued parameters and those which are defined for complex functions as well. */ # define __TGMATH_UNARY_REAL_ONLY(Val, Fct) \ (__extension__ ((sizeof (Val) == sizeof (double) \ || __builtin_classify_type (Val) != 8) \ ? (__tgmath_real_type (Val)) Fct (Val) \ : (sizeof (Val) == sizeof (float)) \ ? (__tgmath_real_type (Val)) Fct##f (Val) \ : (__tgmath_real_type (Val)) __tgml(Fct) (Val))) # define __TGMATH_UNARY_REAL_RET_ONLY(Val, RetType, Fct) \
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tgmath - /* Copyright (C) 1997, 1998, 1999, 2000, 2001,...

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