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zeekay
6994cf05aa
We do not use Redis. The client was a go-redis fork and still said so
everywhere: `package redis`, `redis.NewClient`, `redis://`, `extra/redisotel`.
Consumers wrote `redis.Client` against a Valkey-backed store called KV.
package redis -> package kv (93 decls)
redis.X -> kv.X (2,794 call sites)
"redis: …" errors -> "kv: …" (206)
extra/redis{otel,cmd,prometheus,census} -> extra/kv{otel,cmd,prometheus,census}
redis:// , rediss:// -> kv:// , kvs:// (ParseURL)
Redis*/*Redis* idents -> KV*/*KV*
REDIS_VERSION, REDIS_ENDPOINTS_CONFIG_PATH -> KV_*
I previously argued this rename was unsafe because much of it was "wire
contract". That was wrong, and the categorisation shows why: RESP command names
are GET/SET/HSET — they never contain the word. Of 5,771 occurrences only two
kinds were server-visible at all: the ParseURL scheme (we choose what we pass;
our configs already use kv://) and the CLIENT SETINFO lib-name label, which the
server merely records. Nothing here changes a byte of protocol.
Two things deliberately keep the old spelling:
RediSearch — names a specific external module the FT.* commands map to.
StoreDist — contains the letters by accident (sto-reDis-t), not the word.
Breaking for consumers by design: every import site must move redis.X -> kv.X.
Minor bump, never a major — this module stays v9 forever.
186 lines
3.4 KiB
Go
186 lines
3.4 KiB
Go
package proto
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import (
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"encoding"
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"fmt"
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"net"
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"reflect"
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"time"
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"github.com/hanzokv/go/v9/internal/util"
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)
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// Scan parses bytes `b` to `v` with appropriate type.
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//
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//nolint:gocyclo
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func Scan(b []byte, v interface{}) error {
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switch v := v.(type) {
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case nil:
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return fmt.Errorf("kv: Scan(nil)")
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case *string:
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*v = util.BytesToString(b)
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return nil
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case *[]byte:
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*v = b
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return nil
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case *int:
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var err error
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*v, err = util.Atoi(b)
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return err
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case *int8:
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n, err := util.ParseInt(b, 10, 8)
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if err != nil {
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return err
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}
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*v = int8(n)
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return nil
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case *int16:
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n, err := util.ParseInt(b, 10, 16)
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if err != nil {
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return err
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}
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*v = int16(n)
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return nil
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case *int32:
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n, err := util.ParseInt(b, 10, 32)
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if err != nil {
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return err
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}
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*v = int32(n)
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return nil
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case *int64:
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n, err := util.ParseInt(b, 10, 64)
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if err != nil {
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return err
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}
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*v = n
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return nil
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case *uint:
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n, err := util.ParseUint(b, 10, 64)
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if err != nil {
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return err
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}
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*v = uint(n)
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return nil
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case *uint8:
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n, err := util.ParseUint(b, 10, 8)
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if err != nil {
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return err
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}
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*v = uint8(n)
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return nil
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case *uint16:
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n, err := util.ParseUint(b, 10, 16)
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if err != nil {
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return err
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}
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*v = uint16(n)
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return nil
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case *uint32:
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n, err := util.ParseUint(b, 10, 32)
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if err != nil {
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return err
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}
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*v = uint32(n)
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return nil
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case *uint64:
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n, err := util.ParseUint(b, 10, 64)
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if err != nil {
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return err
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}
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*v = n
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return nil
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case *float32:
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n, err := util.ParseFloat(b, 32)
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if err != nil {
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return err
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}
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*v = float32(n)
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return err
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case *float64:
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var err error
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*v, err = util.ParseFloat(b, 64)
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return err
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case *bool:
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*v = len(b) == 1 && b[0] == '1'
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return nil
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case *time.Time:
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var err error
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*v, err = time.Parse(time.RFC3339Nano, util.BytesToString(b))
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return err
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case *time.Duration:
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n, err := util.ParseInt(b, 10, 64)
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if err != nil {
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return err
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}
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*v = time.Duration(n)
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return nil
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case encoding.BinaryUnmarshaler:
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return v.UnmarshalBinary(b)
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case *net.IP:
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*v = b
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return nil
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default:
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return fmt.Errorf(
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"kv: can't unmarshal %T (consider implementing BinaryUnmarshaler)", v)
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}
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}
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func ScanSlice(data []string, slice interface{}) error {
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v := reflect.ValueOf(slice)
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if !v.IsValid() {
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return fmt.Errorf("kv: ScanSlice(nil)")
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}
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if v.Kind() != reflect.Ptr {
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return fmt.Errorf("kv: ScanSlice(non-pointer %T)", slice)
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}
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v = v.Elem()
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if v.Kind() != reflect.Slice {
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return fmt.Errorf("kv: ScanSlice(non-slice %T)", slice)
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}
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next := makeSliceNextElemFunc(v)
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for i, s := range data {
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elem := next()
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if err := Scan([]byte(s), elem.Addr().Interface()); err != nil {
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err = fmt.Errorf("kv: ScanSlice index=%d value=%q failed: %w", i, s, err)
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return err
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}
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}
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return nil
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}
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func makeSliceNextElemFunc(v reflect.Value) func() reflect.Value {
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elemType := v.Type().Elem()
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if elemType.Kind() == reflect.Ptr {
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elemType = elemType.Elem()
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return func() reflect.Value {
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if v.Len() < v.Cap() {
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v.Set(v.Slice(0, v.Len()+1))
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elem := v.Index(v.Len() - 1)
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if elem.IsNil() {
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elem.Set(reflect.New(elemType))
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}
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return elem.Elem()
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}
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elem := reflect.New(elemType)
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v.Set(reflect.Append(v, elem))
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return elem.Elem()
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}
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}
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zero := reflect.Zero(elemType)
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return func() reflect.Value {
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if v.Len() < v.Cap() {
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v.Set(v.Slice(0, v.Len()+1))
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return v.Index(v.Len() - 1)
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}
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v.Set(reflect.Append(v, zero))
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return v.Index(v.Len() - 1)
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}
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}
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