34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# CDDL HEADER START
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34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# CDDL HEADER END
3e14f97f673e8a630f076077de35afdd43dc1587Roger A. Faulkner# Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# This test checks whether the arithmetric function "iszero" is available.
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# This was reported as CR #6777491 ("*ksh93* lacks arithmetric function
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# iszero()"):
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# ------------ snip ------------
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# ksh93 lacks arithmetric function "iszero()" which limits the ability
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# to classify floating-point values or even correctly match against
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# zero (since IEEE754-1985/2008 floating-point math differs between
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# positive and negaive zero values).
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# Steps to Reproduce
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# $ ksh93 -c '(( iszero(0) )) && print "0 is a zero"'
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# Expected Result
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# Output to stdout:
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# 0 is a zero
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# Actual Result
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# ksh93 exists with:
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# ksh93: iszero(0) : unknown function
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# Error Message(s)
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# ksh93: iszero(0) : unknown function
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# ksh93 -c '(( iszero(0) )) && print "0 is a zero"'
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz# ------------ snip ------------
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz 'float n=1. ; (( iszero(n-1.) )) && print "OK"'
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz 'float n=-1. ; (( iszero(n+1.) )) && print "OK"'
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz str="$( $SHELL -o errexit -c "${tests[i]}" 2>&1 )" || err_exit "test $i: returned non-zero exit code $?"
34f9b3eef6fdadbda0a846aa4d68691ac40eace5Roland Mainz [[ "${str}" == "OK" ]] || err_exit "test $i: expected 'OK', got '${str}'"