50 lines
843 B
Go
50 lines
843 B
Go
|
package jsonrpc
|
||
|
|
|
||
|
|
import (
|
||
|
|
"encoding/json"
|
||
|
|
"reflect"
|
||
|
|
)
|
||
|
|
|
||
|
|
type param struct {
|
||
|
|
data []byte // from unmarshal
|
||
|
|
|
||
|
|
v reflect.Value // to marshal
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p *param) UnmarshalJSON(raw []byte) error {
|
||
|
|
p.data = make([]byte, len(raw))
|
||
|
|
copy(p.data, raw)
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (p *param) MarshalJSON() ([]byte, error) {
|
||
|
|
return json.Marshal(p.v.Interface())
|
||
|
|
}
|
||
|
|
|
||
|
|
// processFuncOut finds value and error Outs in function
|
||
|
|
func processFuncOut(funcType reflect.Type) (valOut int, errOut int, n int) {
|
||
|
|
errOut = -1 // -1 if not found
|
||
|
|
valOut = -1
|
||
|
|
n = funcType.NumOut()
|
||
|
|
|
||
|
|
switch n {
|
||
|
|
case 0:
|
||
|
|
case 1:
|
||
|
|
if funcType.Out(0) == errorType {
|
||
|
|
errOut = 0
|
||
|
|
} else {
|
||
|
|
valOut = 0
|
||
|
|
}
|
||
|
|
case 2:
|
||
|
|
valOut = 0
|
||
|
|
errOut = 1
|
||
|
|
if funcType.Out(1) != errorType {
|
||
|
|
panic("expected error as second return value")
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
panic("too many error values")
|
||
|
|
}
|
||
|
|
|
||
|
|
return
|
||
|
|
}
|