306 lines
5.6 KiB
Plaintext
Executable File
306 lines
5.6 KiB
Plaintext
Executable File
#ash# set +o posix
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#ash# declare -i iv jv
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echo "Format: 'expected actual'"
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iv=$(( 3 + 5 * 32 ))
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echo 163 $iv
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#ash# iv=iv+3
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#ash# echo 166 $iv
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iv=2
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jv=iv
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: $((jv *= 2)) ##hush## let "jv *= 2"
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echo 4 $jv
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jv=$(( $jv << 2 ))
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echo 16 $jv
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: $((jv=$jv / 2)) ##hush## let jv="$jv / 2"
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echo 8 $jv
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#ash# jv="jv >> 2"
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: $((jv=jv >> 2)) ##hush## let jv="jv >> 2"
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echo 2 $jv
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iv=$((iv+ $jv))
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echo 4 $iv
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echo 2 $((iv -= jv))
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echo 2 $iv
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echo 1 $(( iv == jv ))
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echo 0 $(( iv != $jv ))
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echo 0 $(( iv < jv ))
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echo 0 $(( $iv > $jv ))
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echo 1 $(( iv <= $jv ))
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echo 1 $(( $iv >= jv ))
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echo 2 $jv
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echo -3 $(( ~$jv ))
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echo -2 $(( ~1 ))
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echo 1 $(( ! 0 ))
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echo 0 $(( jv % 2 ))
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echo 2 $(( $iv % 4 ))
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echo 131072 $(( iv <<= 16 ))
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echo 29 $(( iv %= 33 ))
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echo 33 $(( 33 & 55 ))
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echo 49 $(( 33 | 17 ))
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echo 1 $(( iv && $jv ))
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echo 1 $(( $iv || jv ))
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echo 0 $(( iv && 0 ))
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echo 0 $(( iv & 0 ))
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echo 1 $(( iv && 1 ))
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echo 1 $(( iv & 1 ))
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echo 1 $(( $jv || 0 ))
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echo 2 $(( jv | 0 ))
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echo 3 $(( jv | 1 ))
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echo 1 $(( $jv || 1 ))
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: $((iv *= jv)) ##hush## let 'iv *= jv'
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echo 58 $iv
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echo 2 $jv
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: $((jv += $iv)) ##hush## let "jv += $iv"
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echo 60 $jv
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echo 1 $(( jv /= iv ))
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echo 256 $(( jv <<= 8 ))
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echo 16 $(( jv >>= 4 ))
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echo 62 $(( iv |= 4 ))
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echo 4 $(( iv &= 4 ))
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echo 29 $(( iv += (jv + 9)))
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echo 5 $(( (iv + 4) % 7 ))
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echo unary plus, minus
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echo -4 $(( +4 - 8 ))
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echo 4 $(( -4 + 8 ))
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echo conditional expressions
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echo 1 $(( 4<5 ? 1 : 32))
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echo 32 $(( 4>5 ? 1 : 32))
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echo 32 $(( 4>(2+3) ? 1 : 32))
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echo 1 $(( 4<(2+3) ? 1 : 32))
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echo 1 $(( (2+2)<(2+3) ? 1 : 32))
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echo 32 $(( (2+2)>(2+3) ? 1 : 32))
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echo 'check that parentheses in `cmd` are interpreted correctly'
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# \x28 is '('
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echo 3 $(( ( `printf '(\x28 1'` + `echo 2\)\)` ) ))
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echo check that the unevaluated part of the ternary operator does not do evaluation or assignment
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x=i+=2
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y=j+=2
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#ash# declare -i i=1 j=1
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i=1
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j=1
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echo 20 $((1 ? 20 : (x+=2)))
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#ash# echo $i,$x # ash mishandles this
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echo 30 $((0 ? (y+=2) : 30))
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#ash# echo $j,$y # ash mishandles this
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x=i+=2
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y=j+=2
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#ash# declare -i i=1 j=1
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i=1
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j=1
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echo 20 $((1 ? 20 : (x+=2)))
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#ash# echo $i,$x # ash mishandles this
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echo 30 $((0 ? (y+=2) : 30))
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#ash# echo $i,$y # ash mishandles this
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echo check precedence of assignment vs. conditional operator
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# should be an error
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#ash# declare -i x=2
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x=2
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#ashnote# bash reports error but continues, ash aborts - using subshell to 'emulate' bash:
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( y=$((1 ? 20 : x+=2)) )
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echo check precedence of assignment vs. conditional operator
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#ash# declare -i x=2
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x=2
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# ash says "line NNN: syntax error: 0 ? x+=2 : 20"
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#ash# echo 20 $((0 ? x+=2 : 20))
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echo associativity of assignment-operator operator
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#ash# declare -i i=1 j=2 k=3
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i=1
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j=2
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k=3
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echo 6 $((i += j += k))
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echo 6,5,3 $i,$j,$k
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echo octal, hex
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echo 263 $(( 0x100 | 007 ))
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echo 255 $(( 0xff ))
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#ash# echo 255 $(( 16#ff ))
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#ash# echo 127 $(( 16#FF/2 ))
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#ash# echo 36 $(( 8#44 ))
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echo 40 $(( 8 ^ 32 ))
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echo other bases
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echo 10 $(( 16#a ))
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echo 10 $(( 32#a ))
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echo 10 $(( 56#a ))
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echo 10 $(( 64#a ))
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echo 10 $(( 16#A ))
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echo 10 $(( 32#A ))
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echo 36 $(( 56#A ))
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echo 36 $(( 64#A ))
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echo 62 $(( 64#@ ))
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echo 63 $(( 64#_ ))
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#ash# # weird bases (error)
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#ash# echo $(( 3425#56 ))
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echo missing number after base
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echo 0 $(( 2# ))
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# these should generate errors
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( echo $(( 7 = 43 )) )
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#ash# echo $(( 2#44 ))
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( echo $(( 44 / 0 )) )
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( let 'jv += $iv' )
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( echo $(( jv += \$iv )) )
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( let 'rv = 7 + (43 * 6' )
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#ash# # more errors
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#ash# declare -i i
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#ash# i=0#4
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#ash# i=2#110#11
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((echo abc; echo def;); echo ghi)
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#ash# if (((4+4) + (4 + 7))); then
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#ash# echo ok
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#ash# fi
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#ash# (()) # make sure the null expression works OK
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#ash# a=(0 2 4 6)
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#ash# echo 6 $(( a[1] + a[2] ))
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#ash# echo 1 $(( (a[1] + a[2]) == a[3] ))
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#ash# (( (a[1] + a[2]) == a[3] )) ; echo 0 $?
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# test pushing and popping the expression stack
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unset A
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A="4 + "
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( echo A $(( ( 4 + A ) + 4 )) )
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A="3 + 5"
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echo 16 $(( ( 4 + A ) + 4 ))
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# badly-formed conditional expressions
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( echo $(( 4 ? : $A )) )
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( echo $(( 1 ? 20 )) )
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( echo $(( 4 ? 20 : )) )
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# precedence and short-circuit evaluation
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B=9
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echo 9 $B
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# error
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( echo $(( 0 && B=42 )); echo 9 $B )
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# error
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( echo $(( 1 || B=88 )); echo 9 $B )
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# ash mistakenly evaluates B=... below
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#ash# echo 0 $(( 0 && (B=42) ))
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echo 9 $B
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#ash# echo 0 $(( (${$} - $$) && (B=42) ))
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echo 9 $B
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#ash# echo 1 $(( 1 || (B=88) ))
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echo 9 $B
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# until command with (( )) command
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x=7
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echo 7 $x
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#ash# until (( x == 4 ))
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until test "$x" = 4
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do
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echo $x
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x=4
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done
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echo 4 $x
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# exponentiation
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echo 32767 $(( 2**15 - 1))
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echo 32768 $(( 2**(16-1)))
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echo 131072 $(( 2**16*2 ))
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echo 2147483647 $(( 2**31-1))
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echo 1 $(( 2**0 ))
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# {pre,post}-{inc,dec}rement and associated errors
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x=4
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echo 4 $x
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echo 4 $(( x++ ))
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echo 5 $x
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echo 5 $(( x-- ))
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echo 4 $x
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echo 3 $(( --x ))
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echo 3 $x
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echo 4 $(( ++x ))
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echo 4 $x
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# ++ is not a inc operator on non-variable, it is the + + sequence
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echo 7 $(( ++7 ))
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( echo $(( 7-- )) )
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( echo $(( --x=7 )) )
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( echo $(( ++x=7 )) )
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( echo $(( x++=7 )) )
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( echo $(( x--=7 )) )
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echo 4 $x
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echo 7 $(( +7 ))
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echo -7 $(( -7 ))
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# ++ is not a inc operator on non-variable, it is the + + sequence
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echo $(( ++7 ))
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echo $(( --7 ))
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${THIS_SH} ./arith1.sub
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${THIS_SH} ./arith2.sub
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x=4
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y=7
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#ash# (( x=8 , y=12 ))
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x=8
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y=12
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echo $x $y
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#ash# # should be an error
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#ash# (( x=9 y=41 ))
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# These are errors
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unset b
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( echo $((a b)) )
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#ash# ((a b))
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n=42
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printf "%d\n" $n
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printf "%i\n" $n
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#ash# echo $(( 8#$(printf "%o\n" $n) ))
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printf "%u\n" $n
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#ash# echo $(( 16#$(printf "%x\n" $n) ))
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#ash# echo $(( 16#$(printf "%X\n" $n) ))
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# causes longjmp botches through bash-2.05b
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a[b[c]d]=e
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