osf1 man page for itrunc

itrunc(3)						     Library Functions Manual							 itrunc(3)

NAME
       itrunc, uitrunc - Truncate a floating-point number

LIBRARY
       Standard C Library (libc.a)

SYNOPSIS
       #include <math.h>

       int itrunc(
	    double x); unsigned int uitrunc(
	    double x);

DESCRIPTION
       The  itrunc function returns the signed integer nearest to the double-precision floating value x in the direction of 0.0.  This effectively
       truncates x by discarding its fraction component.  The  uitrunc function also truncates the double  x,  but  returns  an  unsigned  integer
       value.

       If  x is a NaN or a negative value that exceeds the size of a signed integer, itrunc returns INT_MIN. If x is a positive value that exceeds
       the size of a signed integer, itrunc returns INT_MAX.

       If x is a NaN or a negative value that exceeds the size of an unsigned integer, uitrunc returns a zero. If  x  is  a  positive  value  that
       exceeds the size of an  unsigned integer, itrunc returns UINT_MAX.

RELATED INFORMATION
       Files: float.h, fp.h, limits.h, machine/fpu.h, math.h,

       IEEE Standard for Binary Floating-Point Arithmetic delim off

																	 itrunc(3)