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tgmath(3) [netbsd man page]

TGMATH(3)						   BSD Library Functions Manual 						 TGMATH(3)

NAME
tgmath -- type-generic macros SYNOPSIS
#include <tgmath.h> DESCRIPTION
The header <tgmath.h> provides type-generic macros for <math.h> and <complex.h> functions that have float (suffixed with f), double, and long double (suffixed with l) versions. The arguments that vary across the three functions and have type float, double, and long double, respec- tively, are called generic arguments. The following rules describe which function is actually called if a type-generic macro is invoked. If any generic argument has type long double or long double complex, the long double function is called. Else, if any generic argument has type double, double complex, or an integer type, the double version is invoked. Otherwise, the macro expands to the float implementation. For the macros in the following table, both real and complex functions exist. The real functions are prototyped in <math.h> and the complex equivalents in <complex.h>. The complex function is called if any of the generic arguments is a complex value. Otherwise, the real equiva- lent is called. Macro Real function Complex function acos() acos(3) cacos(3) asin() asin(3) casin(3) atan() atan(3) catan(3) acosh() acosh(3) cacosh(3) asinh() asinh(3) casinh(3) atanh() atanh(3) catanh(3) cos() cos(3) ccos(3) sin() sin(3) csin(3) tan() tan(3) ctan(3) cosh() cosh(3) ccosh(3) sinh() sinh(3) csinh(3) tanh() tanh(3) ctanh(3) exp() exp(3) cexp(3) log() log(3) clog(3) pow() pow(3) cpow(3) sqrt() sqrt(3) csqrt(3) fabs() fabs(3) cabs(3) No complex functions exist for the following macros, so passing a complex value to a generic argument invokes undefined behaviour: atan2(3) fma() llround() remainder(3) cbrt(3) fmax(3) log10(3) remquo() ceil(3) fmin(3) log1p(3) rint(3) copysign(3) fmod(3) log2(3) round(3) erf(3) frexp(3) logb(3) scalbn(3) erfc(3) hypot(3) lrint(3) tgamma() exp2(3) ilogb(3) lround() trunc(3) expm1(3) ldexp(3) nextafter(3) fdim(3) lgamma(3) floor(3) llrint(3) The following macros always expand to a complex function: carg(3) cimag(3) conj(3) cproj() creal(3) This header includes <complex.h> and <math.h>. STANDARDS
The header <tgmath.h> conforms to ISO/IEC 9899:1999 (``ISO C99''). AUTHORS
Matt Thomas <matt@3am-software.com> BUGS
The header <tgmath.h> cannot be implemented with strictly conforming C code and needs special compiler support. The current implementation only works for GCC. Many of the functions mentioned here are not prototyped in <math.h> or <complex.h> as they are not yet implemented. BSD
December 14, 2010 BSD

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TGMATH(3)						   BSD Library Functions Manual 						 TGMATH(3)

NAME
tgmath -- type-generic macros SYNOPSIS
#include <tgmath.h> DESCRIPTION
The header <tgmath.h> provides type-generic macros for <math.h> and <complex.h> functions that have float (suffixed with f), double and long double (suffixed with l) versions. The arguments that vary across the three functions and have type float, double and long double, respec- tively, are called generic arguments. The following rules describe which function is actually called if a type-generic macro is invoked. If any generic argument has type long double or long double complex, the long double function is called. Else, if any generic argument has type double, double complex or an inte- ger type, the double version is invoked. Otherwise, the macro expands to the float implementation. For the macros in the following table, both real and complex functions exist. The real functions are prototyped in <math.h> and the complex equivalents in <complex.h>. The complex function is called if any of the generic arguments is a complex value. Otherwise, the real equiva- lent is called. Macro real function complex function acos() acos() cacos() asin() asin() casin() atan() atan() catan() acosh() acosh() cacosh() asinh() asinh() casinh() atanh() atanh() catanh() cos() cos() ccos() sin() sin() csin() tan() tan() ctan() cosh() cosh() ccosh() sinh() sinh() csinh() tanh() tanh() ctanh() exp() exp() cexp() log() log() clog() pow() pow() cpow() sqrt() sqrt() csqrt() fabs() fabs() cabs() No complex functions exist for the following macros, so passing a complex value to a generic argument invokes undefined behaviour: atan2() fma() llround() remainder() cbrt() fmax() log10() remquo() ceil() fmin() log1p() rint() copysign() fmod() log2() round() erf() frexp() logb() scalbn() erfc() hypot() lrint() scalbln() exp2() ilogb() lround() tgamma() expm1() ldexp() nearbyint() trunc() fdim() lgamma() nextafter() floor() llrint() nexttoward() The following macros always expand to a complex function: carg() cimag() conj() cproj() creal() This header includes <complex.h> and <math.h>. STANDARDS
The header <tgmath.h> conforms to ISO/IEC 9899:1999 (``ISO C99''). HISTORY
The header <tgmath.h> first appeared in FreeBSD 5.3. COMPILER SUPPORT
Before ISO/IEC 9899:2011 (``ISO C11''), the header <tgmath.h> could not be implemented with strictly conforming C code and needed special compiler support. As of ISO/IEC 9899:2011 (``ISO C11''), this header file can be implemented using the _Generic() language keyword. In addition to compilers that support this keyword, this header file works with GCC. BUGS
Many of the functions mentioned here are not prototyped in <math.h> or <complex.h> as they are not yet implemented. This prevents the corre- sponding type-generic macro from working at all. BSD
January 4, 2012 BSD
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