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performance optimization

This commit is contained in:
Lunny Xiao 2021-07-05 14:43:11 +08:00
parent dfdef4b68f
commit 9e5bf5e204
No known key found for this signature in database
GPG Key ID: C3B7C91B632F738A
1 changed files with 156 additions and 10 deletions
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166
convert.go
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@ -63,6 +63,156 @@ func asString(src interface{}) string {
return fmt.Sprintf("%v", src)
}
func asInt64(src interface{}) (int64, error) {
switch v := src.(type) {
case int:
return int64(v), nil
case int16:
return int64(v), nil
case int32:
return int64(v), nil
case int8:
return int64(v), nil
case int64:
return v, nil
case uint:
return int64(v), nil
case uint8:
return int64(v), nil
case uint16:
return int64(v), nil
case uint32:
return int64(v), nil
case uint64:
return int64(v), nil
case []byte:
return strconv.ParseInt(string(v), 10, 64)
case string:
return strconv.ParseInt(v, 10, 64)
case *sql.NullString:
return strconv.ParseInt(v.String, 10, 64)
case *sql.NullInt32:
return int64(v.Int32), nil
case *sql.NullInt64:
return int64(v.Int64), nil
}
rv := reflect.ValueOf(src)
switch rv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return rv.Int(), nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return int64(rv.Uint()), nil
case reflect.Float64:
return int64(rv.Float()), nil
case reflect.Float32:
return int64(rv.Float()), nil
case reflect.String:
return strconv.ParseInt(rv.String(), 10, 64)
}
return 0, fmt.Errorf("unsupported value %T as int64", src)
}
func asUint64(src interface{}) (uint64, error) {
switch v := src.(type) {
case int:
return uint64(v), nil
case int16:
return uint64(v), nil
case int32:
return uint64(v), nil
case int8:
return uint64(v), nil
case int64:
return uint64(v), nil
case uint:
return uint64(v), nil
case uint8:
return uint64(v), nil
case uint16:
return uint64(v), nil
case uint32:
return uint64(v), nil
case uint64:
return v, nil
case []byte:
return strconv.ParseUint(string(v), 10, 64)
case string:
return strconv.ParseUint(v, 10, 64)
case *sql.NullString:
return strconv.ParseUint(v.String, 10, 64)
case *sql.NullInt32:
return uint64(v.Int32), nil
case *sql.NullInt64:
return uint64(v.Int64), nil
}
rv := reflect.ValueOf(src)
switch rv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return uint64(rv.Int()), nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return uint64(rv.Uint()), nil
case reflect.Float64:
return uint64(rv.Float()), nil
case reflect.Float32:
return uint64(rv.Float()), nil
case reflect.String:
return strconv.ParseUint(rv.String(), 10, 64)
}
return 0, fmt.Errorf("unsupported value %T as uint64", src)
}
func asFloat64(src interface{}) (float64, error) {
switch v := src.(type) {
case int:
return float64(v), nil
case int16:
return float64(v), nil
case int32:
return float64(v), nil
case int8:
return float64(v), nil
case int64:
return float64(v), nil
case uint:
return float64(v), nil
case uint8:
return float64(v), nil
case uint16:
return float64(v), nil
case uint32:
return float64(v), nil
case uint64:
return float64(v), nil
case []byte:
return strconv.ParseFloat(string(v), 64)
case string:
return strconv.ParseFloat(v, 64)
case *sql.NullString:
return strconv.ParseFloat(v.String, 64)
case *sql.NullInt32:
return float64(v.Int32), nil
case *sql.NullInt64:
return float64(v.Int64), nil
}
rv := reflect.ValueOf(src)
switch rv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return float64(rv.Int()), nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return float64(rv.Uint()), nil
case reflect.Float64:
return float64(rv.Float()), nil
case reflect.Float32:
return float64(rv.Float()), nil
case reflect.String:
return strconv.ParseFloat(rv.String(), 64)
}
return 0, fmt.Errorf("unsupported value %T as int64", src)
}
func asBytes(buf []byte, rv reflect.Value) (b []byte, ok bool) {
switch rv.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
@ -380,34 +530,30 @@ func convertAssignV(dpv reflect.Value, src interface{}, originalLocation, conver
dv.Set(reflect.New(dv.Type().Elem()))
return convertAssign(dv.Interface(), src, originalLocation, convertedLocation)
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
s := asString(src)
i64, err := strconv.ParseInt(s, 10, dv.Type().Bits())
i64, err := asInt64(src)
if err != nil {
err = strconvErr(err)
return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
return fmt.Errorf("converting driver.Value type %T to a %s: %v", src, dv.Kind(), err)
}
dv.SetInt(i64)
return nil
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
s := asString(src)
u64, err := strconv.ParseUint(s, 10, dv.Type().Bits())
u64, err := asUint64(src)
if err != nil {
err = strconvErr(err)
return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
return fmt.Errorf("converting driver.Value type %T to a %s: %v", src, dv.Kind(), err)
}
dv.SetUint(u64)
return nil
case reflect.Float32, reflect.Float64:
s := asString(src)
f64, err := strconv.ParseFloat(s, dv.Type().Bits())
f64, err := asFloat64(src)
if err != nil {
err = strconvErr(err)
return fmt.Errorf("converting driver.Value type %T (%q) to a %s: %v", src, s, dv.Kind(), err)
return fmt.Errorf("converting driver.Value type %T to a %s: %v", src, dv.Kind(), err)
}
dv.SetFloat(f64)
return nil
case reflect.String:
fmt.Println("=====", src)
dv.SetString(asString(src))
return nil
}