tests/arith.tests

   1 set +o posix
   2 declare -i iv jv
   3
   4 iv=$(( 3 + 5 * 32 ))
   5 echo $iv
   6 iv=iv+3
   7 echo $iv
   8 iv=2
   9 jv=iv
  10
  11 let "jv *= 2"
  12 echo $jv
  13 jv=$(( $jv << 2 ))
  14 echo $jv
  15
  16 let jv="$jv / 2"
  17 echo $jv
  18 jv="jv >> 2"
  19 echo $jv
  20
  21 iv=$((iv+ $jv))
  22 echo $iv
  23 echo $((iv -= jv))
  24 echo $iv
  25 echo $(( iv == jv ))
  26 echo $(( iv != $jv ))
  27 echo $(( iv < jv ))
  28 echo $(( $iv > $jv ))
  29 echo $(( iv <= $jv ))
  30 echo $(( $iv >= jv ))
  31
  32 echo $jv
  33 echo $(( ~$jv ))
  34 echo $(( ~1 ))
  35 echo $(( ! 0 ))
  36
  37 echo $(( jv % 2 ))
  38 echo $(( $iv % 4 ))
  39
  40 echo $(( iv <<= 16 ))
  41 echo $(( iv %= 33 ))
  42
  43 echo $(( 33 & 55 ))
  44 echo $(( 33 | 17 ))
  45
  46 echo $(( iv && $jv ))
  47 echo $(( $iv || jv ))
  48
  49 echo $(( iv && 0 ))
  50 echo $(( iv & 0 ))
  51 echo $(( iv && 1 ))
  52 echo $(( iv & 1 ))
  53
  54 echo $(( $jv || 0 ))
  55 echo $(( jv | 0 ))
  56 echo $(( jv | 1 ))
  57 echo $(( $jv || 1 ))
  58
  59 let 'iv *= jv'
  60 echo $iv
  61 echo $jv
  62 let "jv += $iv"
  63 echo $jv
  64
  65 echo $(( jv /= iv ))
  66 echo $(( jv <<= 8 ))
  67 echo $(( jv >>= 4 ))
  68
  69 echo $(( iv |= 4 ))
  70 echo $(( iv &= 4 ))
  71
  72 echo $(( iv += (jv + 9)))
  73 echo $(( (iv + 4) % 7 ))
  74
  75 # unary plus, minus
  76 echo $(( +4 - 8 ))
  77 echo $(( -4 + 8 ))
  78
  79 # conditional expressions
  80 echo $(( 4<5 ? 1 : 32))
  81 echo $(( 4>5 ? 1 : 32))
  82 echo $(( 4>(2+3) ? 1 : 32))
  83 echo $(( 4<(2+3) ? 1 : 32))
  84 echo $(( (2+2)<(2+3) ? 1 : 32))
  85 echo $(( (2+2)>(2+3) ? 1 : 32))
  86
  87 # bug in bash versions through bash-3.2
  88 S=105
  89 W=$((S>99?4:S>9?3:S>0?2:0))
  90 echo $W
  91 unset W S
  92
  93 # check that the unevaluated part of the ternary operator does not do
  94 # evaluation or assignment
  95 x=i+=2
  96 y=j+=2
  97 declare -i i=1 j=1
  98 echo $((1 ? 20 : (x+=2)))
  99 echo $i,$x
 100 echo $((0 ? (y+=2) : 30))
 101 echo $j,$y
 102
 103 x=i+=2
 104 y=j+=2
 105 declare -i i=1 j=1
 106 echo $((1 ? 20 : (x+=2)))
 107 echo $i,$x
 108 echo $((0 ? (y+=2) : 30))
 109 echo $i,$y
 110
 111 # check precedence of assignment vs. conditional operator
 112 # should be an error
 113 declare -i x=2
 114 y=$((1 ? 20 : x+=2))
 115
 116 # check precedence of assignment vs. conditional operator
 117 declare -i x=2
 118 echo $((0 ? x+=2 : 20))
 119
 120 # associativity of assignment-operator operator
 121 declare -i i=1 j=2 k=3
 122 echo $((i += j += k))
 123 echo $i,$j,$k
 124
 125 # octal, hex
 126 echo $(( 0x100 | 007 ))
 127 echo $(( 0xff ))
 128 echo $(( 16#ff ))
 129 echo $(( 16#FF/2 ))
 130 echo $(( 8#44 ))
 131
 132 echo $(( 8 ^ 32 ))
 133
 134 # other bases
 135 echo $(( 16#a ))
 136 echo $(( 32#a ))
 137 echo $(( 56#a ))
 138 echo $(( 64#a ))
 139
 140 echo $(( 16#A ))
 141 echo $(( 32#A ))
 142 echo $(( 56#A ))
 143 echo $(( 64#A ))
 144
 145 echo $(( 64#@ ))
 146 echo $(( 64#_ ))
 147
 148 # weird bases
 149 echo $(( 3425#56 ))
 150
 151 # missing number after base
 152 echo $(( 2# ))
 153
 154 # these should generate errors
 155 echo $(( 7 = 43 ))
 156 echo $(( 2#44 ))
 157 echo $(( 44 / 0 ))
 158 let 'jv += $iv'
 159 echo $(( jv += \$iv ))
 160 let 'rv = 7 + (43 * 6'
 161
 162 # more errors
 163 declare -i i
 164 i=0#4
 165 i=2#110#11
 166
 167 ((echo abc; echo def;); echo ghi)
 168
 169 if (((4+4) + (4 + 7))); then
 170         echo ok
 171 fi
 172
 173 (())    # make sure the null expression works OK
 174
 175 a=(0 2 4 6)
 176 echo $(( a[1] + a[2] ))
 177 echo $(( (a[1] + a[2]) == a[3] ))
 178 (( (a[1] + a[2]) == a[3] )) ; echo $?
 179
 180 # test pushing and popping the expression stack
 181 unset A
 182 A="4 + "
 183 echo $(( ( 4 + A ) + 4 ))
 184 A="3 + 5"
 185 echo $(( ( 4 + A ) + 4 ))
 186
 187 # badly-formed conditional expressions
 188 echo $(( 4 ? : $A ))
 189 echo $(( 1 ? 20 ))
 190 echo $(( 4 ? 20 : ))
 191
 192 # precedence and short-circuit evaluation
 193 B=9
 194 echo $B
 195
 196 echo $(( 0 && B=42 ))
 197 echo $B
 198
 199 echo $(( 1 || B=88 ))
 200 echo $B
 201
 202 echo $(( 0 && (B=42) ))
 203 echo $B
 204
 205 echo $(( (${$} - $$) && (B=42) ))
 206 echo $B
 207
 208 echo $(( 1 || (B=88) ))
 209 echo $B
 210
 211 # until command with (( )) command
 212 x=7
 213
 214 echo $x
 215 until (( x == 4 ))
 216 do
 217         echo $x
 218         x=4
 219 done
 220
 221 echo $x
 222
 223 # exponentiation
 224 echo $(( 2**15 - 1))
 225 echo $(( 2**(16-1)))
 226 echo $(( 2**16*2 ))
 227 echo $(( 2**31-1))
 228 echo $(( 2**0 ))
 229
 230 # {pre,post}-{inc,dec}rement and associated errors
 231
 232 x=4
 233
 234 echo $x
 235 echo $(( x++ ))
 236 echo $x
 237 echo $(( x-- ))
 238 echo $x
 239
 240 echo $(( --x ))
 241 echo $x
 242
 243 echo $(( ++x ))
 244 echo $x
 245
 246 echo $(( ++7 ))
 247 echo $(( 7-- ))
 248
 249 echo $(( --x=7 ))
 250 echo $(( ++x=7 ))
 251
 252 echo $(( x++=7 ))
 253 echo $(( x--=7 ))
 254
 255 echo $x
 256
 257 echo $(( +7 ))
 258 echo $(( -7 ))
 259
 260 echo $(( ++7 ))
 261 echo $(( --7 ))
 262
 263 ${THIS_SH} ./arith1.sub
 264 ${THIS_SH} ./arith2.sub
 265 ${THIS_SH} ./arith3.sub
 266 ${THIS_SH} ./arith4.sub
 267
 268 # make sure arithmetic expansion handles ints > 2**31 - 1 using intmax_t
 269 echo $(( 2147483645 + 4 ))
 270
 271 # other tests using INTMAX_MIN and INTMAX_MAX that cause exceptions if not
 272 # handled correctly -- problem through bash-4.2
 273 ${THIS_SH} ./arith5.sub
 274
 275 # problems with suppressing evaluation present through bash-4.2
 276 ${THIS_SH} ./arith6.sub
 277
 278 x=4
 279 y=7
 280
 281 (( x=8 , y=12 ))
 282
 283 echo $x $y
 284
 285 # should be an error
 286 (( x=9 y=41 ))
 287
 288 # These are errors
 289 unset b
 290 echo $((a b))
 291 ((a b))
 292
 293 n=42
 294 printf "%d\n" $n
 295 printf "%i\n" $n
 296 echo $(( 8#$(printf "%o\n" $n) ))
 297 printf "%u\n" $n
 298 echo $(( 16#$(printf "%x\n" $n) ))
 299 echo $(( 16#$(printf "%X\n" $n) ))
 300
 301 # causes longjmp botches through bash-2.05b
 302 a[b[c]d]=e