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Diffstat (limited to 'tests/misc/sort-float.sh')
| -rwxr-xr-x | tests/misc/sort-float.sh | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/tests/misc/sort-float.sh b/tests/misc/sort-float.sh new file mode 100755 index 0000000..5beab7c --- /dev/null +++ b/tests/misc/sort-float.sh @@ -0,0 +1,94 @@ +#!/bin/sh +# Ensure sort -g sorts floating point limits correctly + +# Copyright (C) 2010-2016 Free Software Foundation, Inc. + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src +print_ver_ sort + +# Return 0 if LDBL_MIN is smaller than DBL_MIN, else 1. +# Dissect numbers like these, comparing first exponent, then +# whole part of mantissa, then fraction, until finding enough +# of a difference to determine the relative order of the numbers. +# These are "reversed": +# $ ./getlimits |grep DBL_MIN +# DBL_MIN=2.225074e-308 +# LDBL_MIN=2.004168e-292 +# +# These are in the expected order: +# $ ./getlimits|grep DBL_MIN +# DBL_MIN=2.225074e-308 +# LDBL_MIN=3.362103e-4932 + +dbl_minima_order() +{ + LC_ALL=C getlimits_ + set -- $(echo $LDBL_MIN | tr .e- ' ') + local ldbl_whole=$1 ldbl_frac=$2 ldbl_exp=$3 + + set -- $(echo $DBL_MIN |tr .e- ' ') + local dbl_whole=$1 dbl_frac=$2 dbl_exp=$3 + + test "$dbl_exp" -lt "$ldbl_exp" && return 0 + test "$ldbl_exp" -lt "$dbl_exp" && return 1 + test "$ldbl_whole" -lt "$dbl_whole" && return 0 + test "$dbl_whole" -lt "$ldbl_whole" && return 1 + test "$ldbl_frac" -le "$dbl_frac" && return 0 + return 1 +} + +# On some systems, DBL_MIN < LDBL_MIN. Detect that. +dbl_minima_order; reversed=$? + +for LOC in C $LOCALE_FR; do + + LC_ALL=$LOC getlimits_ + + # See if sort should be using long doubles + grep '^#define HAVE_C99_STRTOLD 1' $CONFIG_HEADER > /dev/null || + { LDBL_MAX="$DBL_MAX"; LDBL_MIN="$DBL_MIN"; } + + # If DBL_MIN happens to be smaller than LDBL_MIN, swap them, + # so that out expected output is sorted. + if test $reversed = 1; then + t=$LDBL_MIN + LDBL_MIN=$DBL_MIN + DBL_MIN=$t + fi + + printf -- "\ +-$LDBL_MAX +-$DBL_MAX +-$FLT_MAX +-$FLT_MIN +-$DBL_MIN +-$LDBL_MIN +0 +$LDBL_MIN +$DBL_MIN +$FLT_MIN +$FLT_MAX +$DBL_MAX +$LDBL_MAX +" | + grep '^[0-9.,e+-]*$' > exp # restrict to numeric just in case + + tac exp | LC_ALL=$LOC sort -sg > out || fail=1 + + compare exp out || fail=1 +done + +Exit $fail |