diff/diff_pointer.go at master · r3labs/diff · GitHub

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/* This Source Code Form is subject to the terms of the Mozilla Public

* License, v. 2.0. If a copy of the MPL was not distributed with this

* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

package diff

import (

"reflect"

"unsafe"

)

var isExportFlag uintptr = (1 << 5) | (1 << 6)

func (d *Differ) diffPtr(path []string, a, b reflect.Value, parent interface{}) error {

if a.Kind() != b.Kind() {

if a.Kind() == reflect.Invalid {

if !b.IsNil() {

return d.diff(path, reflect.ValueOf(nil), reflect.Indirect(b), parent)

}

d.cl.Add(CREATE, path, nil, exportInterface(b), parent)

return nil

}

if b.Kind() == reflect.Invalid {

if !a.IsNil() {

return d.diff(path, reflect.Indirect(a), reflect.ValueOf(nil), parent)

}

d.cl.Add(DELETE, path, exportInterface(a), nil, parent)

return nil

}

return ErrTypeMismatch

}

if a.IsNil() && b.IsNil() {

return nil

}

if a.IsNil() {

d.cl.Add(UPDATE, path, nil, exportInterface(b), parent)

return nil

}

if b.IsNil() {

d.cl.Add(UPDATE, path, exportInterface(a), nil, parent)

return nil

}

return d.diff(path, reflect.Indirect(a), reflect.Indirect(b), parent)

}

func exportInterface(v reflect.Value) interface{} {

if !v.CanInterface() {

flagTmp := (*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(&v)) + 2*unsafe.Sizeof(uintptr(0))))

*flagTmp = (*flagTmp) & (^isExportFlag)

}

return v.Interface()

}

diff/diff_pointer.go at master · r3labs/diff · GitHub

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