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