forked from mirror/redis
146 lines
2.7 KiB
Go
146 lines
2.7 KiB
Go
package internal
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"strconv"
|
|
"time"
|
|
"unicode/utf8"
|
|
|
|
"github.com/go-redis/redis/v8/internal/util"
|
|
"go.opentelemetry.io/otel/api/global"
|
|
"go.opentelemetry.io/otel/api/trace"
|
|
)
|
|
|
|
func Sleep(ctx context.Context, dur time.Duration) error {
|
|
return WithSpan(ctx, "sleep", func(ctx context.Context) error {
|
|
t := time.NewTimer(dur)
|
|
defer t.Stop()
|
|
|
|
select {
|
|
case <-t.C:
|
|
return nil
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
}
|
|
})
|
|
}
|
|
|
|
func ToLower(s string) string {
|
|
if isLower(s) {
|
|
return s
|
|
}
|
|
|
|
b := make([]byte, len(s))
|
|
for i := range b {
|
|
c := s[i]
|
|
if c >= 'A' && c <= 'Z' {
|
|
c += 'a' - 'A'
|
|
}
|
|
b[i] = c
|
|
}
|
|
return util.BytesToString(b)
|
|
}
|
|
|
|
func isLower(s string) bool {
|
|
for i := 0; i < len(s); i++ {
|
|
c := s[i]
|
|
if c >= 'A' && c <= 'Z' {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
func Unwrap(err error) error {
|
|
u, ok := err.(interface {
|
|
Unwrap() error
|
|
})
|
|
if !ok {
|
|
return nil
|
|
}
|
|
return u.Unwrap()
|
|
}
|
|
|
|
func WithSpan(ctx context.Context, name string, fn func(context.Context) error) error {
|
|
if !trace.SpanFromContext(ctx).IsRecording() {
|
|
return fn(ctx)
|
|
}
|
|
|
|
ctx, span := global.Tracer("go-redis").Start(ctx, name)
|
|
defer span.End()
|
|
|
|
return fn(ctx)
|
|
}
|
|
|
|
func AppendArg(b []byte, v interface{}) []byte {
|
|
switch v := v.(type) {
|
|
case nil:
|
|
return append(b, "<nil>"...)
|
|
case string:
|
|
return appendUTF8String(b, v)
|
|
case []byte:
|
|
return appendUTF8String(b, String(v))
|
|
case int:
|
|
return strconv.AppendInt(b, int64(v), 10)
|
|
case int8:
|
|
return strconv.AppendInt(b, int64(v), 10)
|
|
case int16:
|
|
return strconv.AppendInt(b, int64(v), 10)
|
|
case int32:
|
|
return strconv.AppendInt(b, int64(v), 10)
|
|
case int64:
|
|
return strconv.AppendInt(b, v, 10)
|
|
case uint:
|
|
return strconv.AppendUint(b, uint64(v), 10)
|
|
case uint8:
|
|
return strconv.AppendUint(b, uint64(v), 10)
|
|
case uint16:
|
|
return strconv.AppendUint(b, uint64(v), 10)
|
|
case uint32:
|
|
return strconv.AppendUint(b, uint64(v), 10)
|
|
case uint64:
|
|
return strconv.AppendUint(b, v, 10)
|
|
case float32:
|
|
return strconv.AppendFloat(b, float64(v), 'f', -1, 64)
|
|
case float64:
|
|
return strconv.AppendFloat(b, v, 'f', -1, 64)
|
|
case bool:
|
|
if v {
|
|
return append(b, "true"...)
|
|
}
|
|
return append(b, "false"...)
|
|
case time.Time:
|
|
return v.AppendFormat(b, time.RFC3339Nano)
|
|
default:
|
|
return append(b, fmt.Sprint(v)...)
|
|
}
|
|
}
|
|
|
|
func appendUTF8String(b []byte, s string) []byte {
|
|
for _, r := range s {
|
|
b = appendRune(b, r)
|
|
}
|
|
return b
|
|
}
|
|
|
|
func appendRune(b []byte, r rune) []byte {
|
|
if r < utf8.RuneSelf {
|
|
switch c := byte(r); c {
|
|
case '\n':
|
|
return append(b, "\\n"...)
|
|
case '\r':
|
|
return append(b, "\\r"...)
|
|
default:
|
|
return append(b, c)
|
|
}
|
|
}
|
|
|
|
l := len(b)
|
|
b = append(b, make([]byte, utf8.UTFMax)...)
|
|
n := utf8.EncodeRune(b[l:l+utf8.UTFMax], r)
|
|
b = b[:l+n]
|
|
|
|
return b
|
|
}
|