sun_solaris_cr_6777491_lacks_arithmetric_function_iszero.sh revision 34f9b3eef6fdadbda0a846aa4d68691ac40eace5
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# Copyright 2009 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
#
# This test checks whether the arithmetric function "iszero" is available.
#
# This was reported as CR #6777491 ("*ksh93* lacks arithmetric function
# iszero()"):
# ------------ snip ------------
# ksh93 lacks arithmetric function "iszero()" which limits the ability
# to classify floating-point values or even correctly match against
# zero (since IEEE754-1985/2008 floating-point math differs between
# positive and negaive zero values).
# Frequency
# Always
# Regression
# No
# Steps to Reproduce
# $ ksh93 -c '(( iszero(0) )) && print "0 is a zero"'
# Expected Result
# Output to stdout:
# -- snip --
# 0 is a zero
# -- snip --
# Actual Result
# ksh93 exists with:
# -- snip --
# ksh93: iszero(0) : unknown function
# -- snip --
# Error Message(s)
# ksh93: iszero(0) : unknown function
# Test Case
# ksh93 -c '(( iszero(0) )) && print "0 is a zero"'
# ------------ snip ------------
#
# test setup
function err_exit
{
print -u2 -n "\t"
}
alias err_exit='err_exit $LINENO'
set -o nounset
integer Errors=0
typeset str
integer i
typeset -a tests=(
'(( iszero(0) )) && print "OK"'
'(( iszero(0.) )) && print "OK"'
'(( iszero(-0) )) && print "OK"'
'(( iszero(-0.) )) && print "OK"'
'float n=0. ; (( iszero(n) )) && print "OK"'
'float n=+0. ; (( iszero(n) )) && print "OK"'
'float n=-0. ; (( iszero(n) )) && print "OK"'
'float n=1. ; (( iszero(n) )) || print "OK"'
'float n=1. ; (( iszero(n-1.) )) && print "OK"'
'float n=-1. ; (( iszero(n+1.) )) && print "OK"'
)
for (( i=0 ; i < ${#tests[@]} ; i++ )) ; do
str="$( $SHELL -o errexit -c "${tests[i]}" 2>&1 )" || err_exit "test $i: returned non-zero exit code $?"
done
# tests done