Guardian Native C Library Calls Reference Manual (G06.29+, H06.08+, J06.03+)

Guardian Native C Library Calls (a - e) clog(3)

NAME

clog - Computes the complex natural logarithm function

LIBRARY

H-series and J-series native Guardian processes: $SYSTEM.ZDLLnnn.ZCREDLL

32-bit H-series and J-series OSS processes: /G/system/zdllnnn/zcredll

64-bit H-series and J-series OSS processes: /G/system/zdllnnn/ycredll

SYNOPSIS

#include <complex.h>

double complex clog(

double complex z);

PARAMETERS

z Speciﬁes a double complex value.

DESCRIPTION

The clog( ) function computes the complex natural (base-e) logarithm of z, with a branch cut

along the negative real axis.

NOTES

This function is implemented only for the IEEE_ﬂoat ﬂoating-point option. Applications using

this function cannot be compiled if the speciﬁed ﬂoating-point option is Tandem_ﬂoat.

RETURN VALUES

The clog( ) function returns the complex natural logarithm of z, in the range of a strip mathemati-

cally unbound along the real axis and in the interval [-iπ,+iπ] along the imaginary axis.

ERRORS

No errors are deﬁned.

RELATED INFORMATION

Functions: cexp(3), clogf(3), clogl(3), log(3).

STANDARDS CONFORMANCE

This function conforms to the ISO/IEC 9899:1999 standard.

This function conforms to the IEEE Std 1003.1, 2004 Edition.

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