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start_server {tags {"bitops"}} {
test {BITFIELD signed SET and GET basics} {
r del bits
set results {}
lappend results [r bitfield bits set i8 0 -100]
lappend results [r bitfield bits set i8 0 101]
lappend results [r bitfield bits get i8 0]
set results
} {0 -100 101}
test {BITFIELD unsigned SET and GET basics} {
r del bits
set results {}
lappend results [r bitfield bits set u8 0 255]
lappend results [r bitfield bits set u8 0 100]
lappend results [r bitfield bits get u8 0]
set results
} {0 255 100}
test {BITFIELD #<idx> form} {
r del bits
set results {}
r bitfield bits set u8 #0 65
r bitfield bits set u8 #1 66
r bitfield bits set u8 #2 67
r get bits
} {ABC}
test {BITFIELD basic INCRBY form} {
r del bits
set results {}
r bitfield bits set u8 #0 10
lappend results [r bitfield bits incrby u8 #0 100]
lappend results [r bitfield bits incrby u8 #0 100]
set results
} {110 210}
test {BITFIELD chaining of multiple commands} {
r del bits
set results {}
r bitfield bits set u8 #0 10
lappend results [r bitfield bits incrby u8 #0 100 incrby u8 #0 100]
set results
} {{110 210}}
test {BITFIELD unsigned overflow wrap} {
r del bits
set results {}
r bitfield bits set u8 #0 100
lappend results [r bitfield bits overflow wrap incrby u8 #0 257]
lappend results [r bitfield bits get u8 #0]
lappend results [r bitfield bits overflow wrap incrby u8 #0 255]
lappend results [r bitfield bits get u8 #0]
} {101 101 100 100}
test {BITFIELD unsigned overflow sat} {
r del bits
set results {}
r bitfield bits set u8 #0 100
lappend results [r bitfield bits overflow sat incrby u8 #0 257]
lappend results [r bitfield bits get u8 #0]
lappend results [r bitfield bits overflow sat incrby u8 #0 -255]
lappend results [r bitfield bits get u8 #0]
} {255 255 0 0}
test {BITFIELD signed overflow wrap} {
r del bits
set results {}
r bitfield bits set i8 #0 100
lappend results [r bitfield bits overflow wrap incrby i8 #0 257]
lappend results [r bitfield bits get i8 #0]
lappend results [r bitfield bits overflow wrap incrby i8 #0 255]
lappend results [r bitfield bits get i8 #0]
} {101 101 100 100}
test {BITFIELD signed overflow sat} {
r del bits
set results {}
r bitfield bits set u8 #0 100
lappend results [r bitfield bits overflow sat incrby i8 #0 257]
lappend results [r bitfield bits get i8 #0]
lappend results [r bitfield bits overflow sat incrby i8 #0 -255]
lappend results [r bitfield bits get i8 #0]
} {127 127 -128 -128}
test {BITFIELD overflow detection fuzzing} {
for {set j 0} {$j < 1000} {incr j} {
set bits [expr {[randomInt 64]+1}]
set sign [randomInt 2]
set range [expr {2**$bits}]
if {$bits == 64} {set sign 1} ; # u64 is not supported by BITFIELD.
if {$sign} {
set min [expr {-($range/2)}]
set type "i$bits"
} else {
set min 0
set type "u$bits"
}
set max [expr {$min+$range-1}]
# Compare Tcl vs Redis
set range2 [expr {$range*2}]
set value [expr {($min*2)+[randomInt $range2]}]
set increment [expr {($min*2)+[randomInt $range2]}]
if {$value > 9223372036854775807} {
set value 9223372036854775807
}
if {$value < -9223372036854775808} {
set value -9223372036854775808
}
if {$increment > 9223372036854775807} {
set increment 9223372036854775807
}
if {$increment < -9223372036854775808} {
set increment -9223372036854775808
}
set overflow 0
if {$value > $max || $value < $min} {set overflow 1}
if {($value + $increment) > $max} {set overflow 1}
if {($value + $increment) < $min} {set overflow 1}
r del bits
set res1 [r bitfield bits overflow fail set $type 0 $value]
set res2 [r bitfield bits overflow fail incrby $type 0 $increment]
if {$overflow && [lindex $res1 0] ne {} &&
[lindex $res2 0] ne {}} {
fail "OW not detected where needed: $type $value+$increment"
}
if {!$overflow && ([lindex $res1 0] eq {} ||
[lindex $res2 0] eq {})} {
fail "OW detected where NOT needed: $type $value+$increment"
}
}
}
test {BITFIELD overflow wrap fuzzing} {
for {set j 0} {$j < 1000} {incr j} {
set bits [expr {[randomInt 64]+1}]
set sign [randomInt 2]
set range [expr {2**$bits}]
if {$bits == 64} {set sign 1} ; # u64 is not supported by BITFIELD.
if {$sign} {
set min [expr {-($range/2)}]
set type "i$bits"
} else {
set min 0
set type "u$bits"
}
set max [expr {$min+$range-1}]
# Compare Tcl vs Redis
set range2 [expr {$range*2}]
set value [expr {($min*2)+[randomInt $range2]}]
set increment [expr {($min*2)+[randomInt $range2]}]
if {$value > 9223372036854775807} {
set value 9223372036854775807
}
if {$value < -9223372036854775808} {
set value -9223372036854775808
}
if {$increment > 9223372036854775807} {
set increment 9223372036854775807
}
if {$increment < -9223372036854775808} {
set increment -9223372036854775808
}
r del bits
r bitfield bits overflow wrap set $type 0 $value
r bitfield bits overflow wrap incrby $type 0 $increment
set res [lindex [r bitfield bits get $type 0] 0]
set expected 0
if {$sign} {incr expected [expr {$max+1}]}
incr expected $value
incr expected $increment
set expected [expr {$expected % $range}]
if {$sign} {incr expected $min}
if {$res != $expected} {
fail "WRAP error: $type $value+$increment = $res, should be $expected"
}
}
}
test {BITFIELD regression for #3221} {
r set bits 1
r bitfield bits get u1 0
} {0}
test {BITFIELD regression for #3564} {
for {set j 0} {$j < 10} {incr j} {
r del mystring
set res [r BITFIELD mystring SET i8 0 10 SET i8 64 10 INCRBY i8 10 99900]
assert {$res eq {0 0 60}}
}
r del mystring
}
}
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