/usr/share/gocode/src/github.com/alicebob/miniredis/redis.go is in golang-github-alicebob-miniredis-dev 2.2.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | package miniredis
import (
"fmt"
"math"
"strings"
"sync"
"time"
"github.com/alicebob/miniredis/server"
)
const (
msgWrongType = "WRONGTYPE Operation against a key holding the wrong kind of value"
msgInvalidInt = "ERR value is not an integer or out of range"
msgInvalidFloat = "ERR value is not a valid float"
msgInvalidMinMax = "ERR min or max is not a float"
msgInvalidRangeItem = "ERR min or max not valid string range item"
msgInvalidTimeout = "ERR timeout is not an integer or out of range"
msgSyntaxError = "ERR syntax error"
msgKeyNotFound = "ERR no such key"
msgOutOfRange = "ERR index out of range"
msgInvalidCursor = "ERR invalid cursor"
msgXXandNX = "ERR XX and NX options at the same time are not compatible"
msgNegTimeout = "ERR timeout is negative"
msgInvalidSETime = "ERR invalid expire time in set"
msgInvalidSETEXTime = "ERR invalid expire time in setex"
msgInvalidPSETEXTime = "ERR invalid expire time in psetex"
)
func errWrongNumber(cmd string) string {
return fmt.Sprintf("ERR wrong number of arguments for '%s' command", strings.ToLower(cmd))
}
// withTx wraps the non-argument-checking part of command handling code in
// transaction logic.
func withTx(
m *Miniredis,
c *server.Peer,
cb txCmd,
) {
ctx := getCtx(c)
if inTx(ctx) {
addTxCmd(ctx, cb)
c.WriteInline("QUEUED")
return
}
m.Lock()
cb(c, ctx)
// done, wake up anyone who waits on anything.
m.signal.Broadcast()
m.Unlock()
}
// blockCmd is executed returns whether it is done
type blockCmd func(*server.Peer, *connCtx) bool
// blocking keeps trying a command until the callback returns true. Calls
// onTimeout after the timeout (or when we call this in a transaction).
func blocking(
m *Miniredis,
c *server.Peer,
timeout time.Duration,
cb blockCmd,
onTimeout func(*server.Peer),
) {
var (
ctx = getCtx(c)
dl *time.Timer
dlc <-chan time.Time
)
if inTx(ctx) {
addTxCmd(ctx, func(c *server.Peer, ctx *connCtx) {
if !cb(c, ctx) {
onTimeout(c)
}
})
c.WriteInline("QUEUED")
return
}
if timeout != 0 {
dl = time.NewTimer(timeout)
defer dl.Stop()
dlc = dl.C
}
m.Lock()
defer m.Unlock()
for {
done := cb(c, ctx)
if done {
return
}
// there is no cond.WaitTimeout(), so hence the the goroutine to wait
// for a timeout
var (
wg sync.WaitGroup
wakeup = make(chan struct{}, 1)
)
wg.Add(1)
go func() {
m.signal.Wait()
wakeup <- struct{}{}
wg.Done()
}()
select {
case <-wakeup:
case <-dlc:
onTimeout(c)
m.signal.Broadcast() // to kill the wakeup go routine
wg.Wait()
return
}
wg.Wait()
}
}
// formatFloat formats a float the way redis does (sort-of)
func formatFloat(v float64) string {
// Format with %f and strip trailing 0s. This is the most like Redis does
// it :(
// .12 is the magic number where most output is the same as Redis.
if math.IsInf(v, +1) {
return "inf"
}
if math.IsInf(v, -1) {
return "-inf"
}
sv := fmt.Sprintf("%.12f", v)
for strings.Contains(sv, ".") {
if sv[len(sv)-1] != '0' {
break
}
// Remove trailing 0s.
sv = sv[:len(sv)-1]
// Ends with a '.'.
if sv[len(sv)-1] == '.' {
sv = sv[:len(sv)-1]
break
}
}
return sv
}
// redisRange gives Go offsets for something l long with start/end in
// Redis semantics. Both start and end can be negative.
// Used for string range and list range things.
// The results can be used as: v[start:end]
// Note that GETRANGE (on a string key) never returns an empty string when end
// is a large negative number.
func redisRange(l, start, end int, stringSymantics bool) (int, int) {
if start < 0 {
start = l + start
if start < 0 {
start = 0
}
}
if start > l {
start = l
}
if end < 0 {
end = l + end
if end < 0 {
end = -1
if stringSymantics {
end = 0
}
}
}
end++ // end argument is inclusive in Redis.
if end > l {
end = l
}
if end < start {
return 0, 0
}
return start, end
}
// matchKeys filters only matching keys.
// Will return an empty list on invalid match expression.
func matchKeys(keys []string, match string) []string {
re := patternRE(match)
if re == nil {
// Special case, the given pattern won't match anything / is
// invalid.
return nil
}
res := []string{}
for _, k := range keys {
if !re.MatchString(k) {
continue
}
res = append(res, k)
}
return res
}
|