ccosh(), ccoshf(), ccoshl()

QNX SDP8.0C Library ReferenceAPIDeveloper

Compute the complex hyperbolic cosine

Synopsis:

#include <complex.h>

double complex ccosh( double complex z );

float complex ccoshf( float complex z );

long double complex ccoshl( long double complex z );

Arguments:

z
The value that you want to get the complex hyperbolic cosine of.

Library:

libm
The general-purpose math library.
libm-sve
A library that optimizes the code for ARMv8.2 chips that have Scalable Vector Extension hardware.

Your system requirements will determine how you should work with these libraries:

  • If you want only selected processes to run with the SVE version, you can include both libraries in your OS image and use the -l m or -l m-sve option to qcc to link explicitly against the appropriate one.
  • If you want all processes to use the SVE version, include libm-sve.so in your OS image and set up a symbolic link from libm.so to libm-sve.so. Use the -l m option to qcc to link against the library.
Note:
Compile your program with the -fno-builtin option to prevent the compiler from using a built-in version of the function.

Description:

These functions compute the complex hyperbolic cosine of z.

To check for error situations, use feclearexcept() and fetestexcept(). For example:

  • Call feclearexcept(FE_ALL_EXCEPT) before calling ccosh(), ccoshf(), or ccoshl().
  • On return, if fetestexcept(FE_ALL_EXCEPT) is nonzero, then an error has occurred.

Returns:

The complex hyperbolic cosine of z.

If z is: These functions return: Errors:
0 + 0i 1 + 0i —
0 + Infi NaN ± 0i, where the sign of the imaginary part is unspecified FE_INVALID
0 + NaNi NaN ± 0i, where the sign of the imaginary part is unspecified —
x + Infi, for any finite non-zero x NaN - NaNi FE_INVALID
x + NaNi, for any finite non-zero x NaN + NaNi —
Inf + 0i Inf + 0i —
Inf + yi, for any finite nonzero y Inf * cos(y) + Inf * sin(y)i —
Inf + Infi ±Inf + NaNi, where the sign of the real part is unspecified FE_INVALID
Inf + NaNi Inf + NaNi —
NaN + 0i NaN ± 0i, where the sign of the imaginary part is unspecified —
NaN + yi, for any finite nonzero y NaN + NaNi —
NaN + NaNi NaN + NaNi —

These functions raise FE_INEXACT if the FPU reports that the result can't be exactly represented as a floating-point number.

Classification:

C11, POSIX 1003.1

Safety:
Cancellation pointNo
Signal handlerYes
ThreadYes
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