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

ceilf(3) Guardian Native C Library Calls Reference Manual
NAME
ceilf - Rounds float numbers to float integers
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 <math.h>
float ceilf(
float x);
PARAMETERS
x Specifies the float value to be rounded.
DESCRIPTION
The ceilf() function is a float version of the ceil() function; it takes a float argument and returns a
float result.
The ceilf() function returns the smallest floating-point integral value not less than the x parame-
ter.
NOTES
This function supports both IEEE Std 754-1985 floating-point and Tandem floating-point values
in the native environment. IEEE values can include NaN and infinity, and the sign of 0.0 (zero)
can be either positive or negative. Refer to the fp_class(3) reference page for a description of
IEEE value classes.
Guardian functions are available to convert between floating-point formats. Refer to the Guar-
dian Programmer’s Guide for a discussion of floating-point conversions.
RETURN VALUES
Upon successful completion, the ceilf() function returns the smallest integral value not less than
x. For IEEE floating-point values, if the value of x is NaN, NaN is returned. If x is positive or
negative infinity or positive or negative zero, the value of x is returned.
ERRORS
No error values are returned. This function does not set errno.
RELATED INFORMATION
Functions: abs(3), ceil(3), ceill(3), fabs(3), floor(3), fmod(3), fp_class(3), isnan(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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