mirror of https://github.com/n-hys/bash.git
73 lines
1.7 KiB
Plaintext
73 lines
1.7 KiB
Plaintext
# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# a lot of this is technically undefined behavior due to signed 64-bit
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# integer overflow, but we're testing exception handling here
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intmax_max=$((2**63 - 1))
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intmax_min1=$((2**63))
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intmax_min2=$((-2**63))
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case $intmax_max in
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9223372036854775807) ;;
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*) echo "warning: your machine does not support 64-bit arithmetic using intmax_t" 2>&1 ;;
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esac
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# these are actually the same
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echo $(( $intmax_min1 % -1 ))
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echo $(( $intmax_min2 % -1 ))
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echo $(( $intmax_max % -1 ))
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lvalue=$intmax_min1
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(( lvalue%= -1 ))
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echo $lvalue
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lvalue=$intmax_min2
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(( lvalue%= -1 ))
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echo $lvalue
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lvalue=$intmax_max
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(( lvalue%= -1 ))
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echo $lvalue
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# and these
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echo $(( $intmax_min1 / -1 ))
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echo $(( $intmax_min2 / -1 ))
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lvalue=$intmax_min1
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(( lvalue /= -1 ))
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echo $lvalue
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lvalue=$intmax_min2
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(( lvalue /= -1 ))
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echo $lvalue
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echo $(( $intmax_min1 * -1 ))
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echo $(( $intmax_min2 * -1 ))
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lvalue=$intmax_min1
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(( lvalue *= -1 ))
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echo $lvalue
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lvalue=$intmax_min2
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(( lvalue *= -1 ))
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echo $lvalue
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echo $(( -${intmax_min1} ))
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echo $(( -${intmax_min2} ))
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foo1=$(( $intmax_max - 2 ))
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eval echo \{${foo1}..${intmax_max}\}
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