/
obj.go
239 lines (217 loc) · 4.9 KB
/
obj.go
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// Copyright 2019 Alexey Krivonogov. All rights reserved.
// Use of this source code is governed by a MIT license
// that can be found in the LICENSE file.
package vm
import (
"fmt"
"github.com/gentee/gentee/core"
)
// AssignºObjAny assigns integer, float, str, arr, map to obj
func AssignºObjAny(ptr interface{}, value interface{}) (interface{}, error) {
return objType(value)
}
// AssignºObjBool assigns bool to obj
func AssignºObjBool(ptr interface{}, value interface{}) (interface{}, error) {
ptr = objºBool(value.(int64))
return ptr, nil
}
// boolºObj converts object to boolean value
func boolºObj(val *core.Obj) (ret int64, err error) {
if val.Data == nil {
return 0, fmt.Errorf(ErrorText(ErrObjNil))
}
switch v := val.Data.(type) {
case int64:
ret = boolºInt(v)
case bool:
if v {
ret = 1
}
case float64:
ret = boolºFloat(v)
case string:
ret = boolºStr(v)
case *core.Array:
ret = boolºArr(v)
case *core.Map:
ret = boolºMap(v)
}
return
}
// boolºObjDef converts object to boolean value
func boolºObjDef(val *core.Obj, def int64) (int64, error) {
if val == nil || val.Data == nil {
return def, nil
}
return boolºObj(val)
}
// ExpStrºObj adds string and obj in string expression
func ExpStrºObj(left string, right *core.Obj) string {
return left + strºObj(right)
}
// floatºObj converts object to float
func floatºObj(val *core.Obj) (ret float64, err error) {
switch v := val.Data.(type) {
case int64:
ret = floatºInt(v)
case float64:
ret = v
case string:
ret, err = floatºStr(v)
default:
err = fmt.Errorf(ErrorText(ErrObjValue))
}
return
}
// floatºObjDef converts object to float
func floatºObjDef(val *core.Obj, def float64) (float64, error) {
if val == nil || val.Data == nil {
return def, nil
}
return floatºObj(val)
}
// intºObj converts object to integer
func intºObj(val *core.Obj) (ret int64, err error) {
switch v := val.Data.(type) {
case int64:
ret = v
case bool:
if v {
ret = 1
}
case float64:
ret = intºFloat(v)
case string:
ret, err = intºStr(v)
default:
err = fmt.Errorf(ErrorText(ErrObjValue))
}
return
}
// intºObjDef converts object to integer
func intºObjDef(val *core.Obj, def int64) (int64, error) {
if val == nil || val.Data == nil {
return def, nil
}
return intºObj(val)
}
// IsNil returns true if the object is undefined
func IsNil(val *core.Obj) int64 {
if val.Data == nil {
return 1
}
return 0
}
// itemºObjInt returns an item from array object
func itemºObjInt(val *core.Obj, ind int64) (ret *core.Obj, err error) {
if val == nil || val.Data == nil {
return
}
switch v := val.Data.(type) {
case *core.Array:
if ind >= 0 && ind < int64(len(v.Data)) {
ret = v.Data[ind].(*core.Obj)
}
default:
err = fmt.Errorf(ErrorText(ErrObjValue))
}
return
}
// itemºObjStr returns an item from map object
func itemºObjStr(val *core.Obj, key string) (ret *core.Obj, err error) {
if val == nil || val.Data == nil {
return
}
switch v := val.Data.(type) {
case *core.Map:
if item, ok := v.Data[key]; ok {
ret = item.(*core.Obj)
}
default:
err = fmt.Errorf(ErrorText(ErrObjValue))
}
return
}
// objºBool converts boolean value to object
func objºBool(val int64) *core.Obj {
obj := core.NewObj()
obj.Data = val != 0
return obj
}
// objºAny converts int, float, string to object
func objºAny(val interface{}) *core.Obj {
obj := core.NewObj()
obj.Data = val
return obj
}
// Type returns the type of the object's value
func Type(val *core.Obj) string {
if val.Data == nil {
return `nil`
}
switch val.Data.(type) {
case bool:
return `bool`
case int64:
return `int`
case float64:
return `float`
case *core.Array:
return `arr.obj`
case *core.Map:
return `arr.map`
}
return `str`
}
// strºObj converts object value to string
func strºObj(val *core.Obj) string {
return fmt.Sprint(val.Data)
}
// strºObjDef converts object value to string
func strºObjDef(val *core.Obj, def string) string {
if val == nil || val.Data == nil {
return def
}
return strºObj(val)
}
// objType converts variable to object
func objType(val interface{}) (*core.Obj, error) {
obj := core.NewObj()
switch v := val.(type) {
case int64, float64, string:
obj.Data = val
case bool:
obj.Data = v
case *core.Array:
data := core.NewArray()
for _, item := range v.Data {
iobj, err := objType(item)
if err != nil {
return nil, err
}
data.Data = append(data.Data, iobj)
}
obj.Data = data
case *core.Map:
data := core.NewMap()
data.Keys = make([]string, len(v.Keys))
for i, key := range v.Keys {
data.Keys[i] = key
iobj, err := objType(v.Data[key])
if err != nil {
return nil, err
}
data.Data[key] = iobj
}
obj.Data = data
case *core.Obj:
obj = v
default:
return nil, fmt.Errorf(ErrorText(ErrObjType))
}
return obj, nil
}
// objºArrMap converts array and map to object
func objºArrMap(val interface{}) (*core.Obj, error) {
return objType(val)
}