summaryrefslogtreecommitdiffstats
path: root/tests/arith.tests
blob: 1a3501aaad98d36e956a8ddc94e38f35890a539f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
#   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/>.
#
set +o posix
declare -i iv jv

iv=$(( 3 + 5 * 32 ))
echo $iv
iv=iv+3
echo $iv
iv=2
jv=iv

let "jv *= 2"
echo $jv
jv=$(( $jv << 2 ))
echo $jv

let jv="$jv / 2"
echo $jv
jv="jv >> 2"
echo $jv

iv=$((iv+ $jv))
echo $iv
echo $((iv -= jv))
echo $iv
echo $(( iv == jv ))
echo $(( iv != $jv ))
echo $(( iv < jv ))
echo $(( $iv > $jv ))
echo $(( iv <= $jv ))
echo $(( $iv >= jv ))

echo $jv
echo $(( ~$jv ))
echo $(( ~1 ))
echo $(( ! 0 ))

echo $(( jv % 2 ))
echo $(( $iv % 4 ))

echo $(( iv <<= 16 ))
echo $(( iv %= 33 ))

echo $(( 33 & 55 ))
echo $(( 33 | 17 ))

echo $(( iv && $jv ))
echo $(( $iv || jv ))

echo $(( iv && 0 ))
echo $(( iv & 0 ))
echo $(( iv && 1 ))
echo $(( iv & 1 ))

echo $(( $jv || 0 ))
echo $(( jv | 0 ))
echo $(( jv | 1 ))
echo $(( $jv || 1 ))

let 'iv *= jv'
echo $iv
echo $jv
let "jv += $iv"
echo $jv

echo $(( jv /= iv ))
echo $(( jv <<= 8 ))
echo $(( jv >>= 4 ))

echo $(( iv |= 4 ))
echo $(( iv &= 4 ))

echo $(( iv += (jv + 9)))
echo $(( (iv + 4) % 7 ))

# unary plus, minus
echo $(( +4 - 8 ))
echo $(( -4 + 8 ))

# conditional expressions
echo $(( 4<5 ? 1 : 32))
echo $(( 4>5 ? 1 : 32))
echo $(( 4>(2+3) ? 1 : 32))
echo $(( 4<(2+3) ? 1 : 32))
echo $(( (2+2)<(2+3) ? 1 : 32))
echo $(( (2+2)>(2+3) ? 1 : 32))

# bug in bash versions through bash-3.2
S=105
W=$((S>99?4:S>9?3:S>0?2:0))
echo $W
unset W S

# check that the unevaluated part of the ternary operator does not do
# evaluation or assignment
x=i+=2
y=j+=2
declare -i i=1 j=1
echo $((1 ? 20 : (x+=2)))
echo $i,$x
echo $((0 ? (y+=2) : 30))
echo $j,$y

x=i+=2
y=j+=2
declare -i i=1 j=1
echo $((1 ? 20 : (x+=2)))
echo $i,$x
echo $((0 ? (y+=2) : 30))
echo $i,$y

# check precedence of assignment vs. conditional operator
# should be an error
declare -i x=2
y=$((1 ? 20 : x+=2))

# check precedence of assignment vs. conditional operator
declare -i x=2
echo $((0 ? x+=2 : 20))

# associativity of assignment-operator operator
declare -i i=1 j=2 k=3
echo $((i += j += k))
echo $i,$j,$k

# octal, hex
echo $(( 0x100 | 007 ))
echo $(( 0xff ))
echo $(( 16#ff ))
echo $(( 16#FF/2 ))
echo $(( 8#44 ))

echo $(( 8 ^ 32 ))

# other bases
echo $(( 16#a ))
echo $(( 32#a ))
echo $(( 56#a ))
echo $(( 64#a ))

echo $(( 16#A ))
echo $(( 32#A ))
echo $(( 56#A ))
echo $(( 64#A ))

echo $(( 64#@ ))
echo $(( 64#_ ))

# weird bases
echo $(( 3425#56 ))

# missing number after base now generates an error
echo $(( 2# ))

# these should generate errors
echo $(( 7 = 43 ))
echo $(( 2#44 ))
echo $(( 44 / 0 ))
let 'jv += $iv'
echo $(( jv += \$iv ))
let 'rv = 7 + (43 * 6'

# more errors
declare -i i
i=0#4
i=2#110#11

((echo abc; echo def;); echo ghi)

if (((4+4) + (4 + 7))); then
	echo ok
fi

(())	# make sure the null expression works OK

a=(0 2 4 6)
echo $(( a[1] + a[2] ))
echo $(( (a[1] + a[2]) == a[3] ))
(( (a[1] + a[2]) == a[3] )) ; echo $?

# test pushing and popping the expression stack
unset A
A="4 + "
echo $(( ( 4 + A ) + 4 ))
A="3 + 5"
echo $(( ( 4 + A ) + 4 ))

# badly-formed conditional expressions
echo $(( 4 ? : $A ))
echo $(( 1 ? 20 ))
echo $(( 4 ? 20 : ))

# precedence and short-circuit evaluation
B=9
echo $B

echo $(( 0 && B=42 ))
echo $B

echo $(( 1 || B=88 ))
echo $B

echo $(( 0 && (B=42) ))
echo $B

echo $(( (${$} - $$) && (B=42) ))
echo $B

echo $(( 1 || (B=88) ))
echo $B

# until command with (( )) command
x=7

echo $x
until (( x == 4 ))
do
	echo $x
	x=4
done

echo $x

# exponentiation
echo $(( 2**15 - 1))
echo $(( 2**(16-1)))
echo $(( 2**16*2 ))
echo $(( 2**31-1))
echo $(( 2**0 ))

# {pre,post}-{inc,dec}rement and associated errors

x=4

echo $x
echo $(( x++ ))
echo $x
echo $(( x-- ))
echo $x

echo $(( --x ))
echo $x

echo $(( ++x ))
echo $x

echo $(( ++7 ))
echo $(( 7-- ))

echo $(( --x=7 ))
echo $(( ++x=7 ))

echo $(( x++=7 ))
echo $(( x--=7 ))

echo $x

echo $(( +7 ))
echo $(( -7 ))

echo $(( ++7 ))
echo $(( --7 ))

# combinations of expansions
echo $(( "`echo 1+1`" ))
echo $(( `echo 1+1` ))

${THIS_SH} ./arith1.sub
${THIS_SH} ./arith2.sub
${THIS_SH} ./arith3.sub
${THIS_SH} ./arith4.sub

# make sure arithmetic expansion handles ints > 2**31 - 1 using intmax_t
echo $(( 2147483645 + 4 ))

# other tests using INTMAX_MIN and INTMAX_MAX that cause exceptions if not
# handled correctly -- problem through bash-4.2
${THIS_SH} ./arith5.sub

# problems with suppressing evaluation present through bash-4.2
${THIS_SH} ./arith6.sub

# problems with parsing arithmetic expressions containing colons that are
# part of word expansions such as substring extraction
${THIS_SH} ./arith7.sub

# problems with evaluation of conditional expressions
${THIS_SH} ./arith8.sub

x=4
y=7

(( x=8 , y=12 ))

echo $x $y

# should be an error
(( x=9 y=41 ))

# These are errors
unset b
echo $((a b))
((a b))

n=42
printf "%d\n" $n
printf "%i\n" $n
echo $(( 8#$(printf "%o\n" $n) ))
printf "%u\n" $n
echo $(( 16#$(printf "%x\n" $n) ))
echo $(( 16#$(printf "%X\n" $n) ))

# these are errors
foo=1
echo $(( 'foo' ))


# causes longjmp botches through bash-2.05b
a[b[c]d]=e