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yaml_native.go
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yaml_native.go
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package yaml
import (
"fmt"
"gopkg.in/yaml.v2"
. "github.com/candid82/joker/core"
)
func fromObject(obj Object) interface{} {
switch obj := obj.(type) {
case Keyword:
return obj.ToString(false)[1:]
case Bool:
return obj.B
case Number:
return obj.Double().D
case Nil:
return nil
case *Vector:
cnt := obj.Count()
res := make([]interface{}, cnt)
for i := 0; i < cnt; i++ {
res[i] = fromObject(obj.Nth(i))
}
return res
case Map:
res := make(map[string]interface{})
for iter := obj.Iter(); iter.HasNext(); {
p := iter.Next()
var k string
switch p.Key.(type) {
case Keyword:
k = p.Key.ToString(false)[1:]
default:
k = p.Key.ToString(false)
}
res[k] = fromObject(p.Value)
}
return res
default:
return obj.ToString(false)
}
}
func toObject(v interface{}) Object {
switch v := v.(type) {
case string:
return MakeString(v)
case float64:
return Double{D: v}
case int:
return Int{I: v}
case bool:
return Bool{B: v}
case nil:
return NIL
case []interface{}:
res := EmptyVector
for _, v := range v {
res = res.Conjoin(toObject(v))
}
return res
case map[interface{}]interface{}:
res := EmptyArrayMap()
for k, v := range v {
res.Add(toObject(k), toObject(v))
}
return res
default:
panic(RT.NewError(fmt.Sprintf("Unknown yaml value: %v", v)))
}
}
func readString(s string) Object {
var v interface{}
if err := yaml.Unmarshal([]byte(s), &v); err != nil {
panic(RT.NewError("Invalid yaml: " + err.Error()))
}
return toObject(v)
}
func writeString(obj Object) String {
res, err := yaml.Marshal(fromObject(obj))
if err != nil {
panic(RT.NewError("Cannot encode value to yaml: " + err.Error()))
}
return String{S: string(res)}
}