86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package fuzzer
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import (
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"reflect"
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)
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// ValueFuzz recursively changes all basic type values in an object. Any kind of references will not
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// be touch, i.e. the addresses of slices, maps, pointers will stay unchanged.
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func ValueFuzz(obj interface{}) {
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valueFuzz(reflect.ValueOf(obj))
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}
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func valueFuzz(obj reflect.Value) {
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switch obj.Kind() {
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case reflect.Array:
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for i := 0; i < obj.Len(); i++ {
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valueFuzz(obj.Index(i))
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}
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case reflect.Slice:
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if obj.IsNil() {
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// TODO: set non-nil value
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} else {
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for i := 0; i < obj.Len(); i++ {
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valueFuzz(obj.Index(i))
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}
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}
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case reflect.Interface, reflect.Ptr:
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if obj.IsNil() {
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// TODO: set non-nil value
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} else {
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valueFuzz(obj.Elem())
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}
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case reflect.Struct:
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for i, n := 0, obj.NumField(); i < n; i++ {
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valueFuzz(obj.Field(i))
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}
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case reflect.Map:
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if obj.IsNil() {
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// TODO: set non-nil value
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} else {
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for _, k := range obj.MapKeys() {
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// map values are not addressable. We need a copy.
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v := obj.MapIndex(k)
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copy := reflect.New(v.Type())
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copy.Elem().Set(v)
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valueFuzz(copy.Elem())
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obj.SetMapIndex(k, copy.Elem())
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}
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// TODO: set some new value
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}
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case reflect.Func: // ignore, we don't have function types in our API
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default:
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if !obj.CanSet() {
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return
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}
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switch obj.Kind() {
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case reflect.String:
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obj.SetString(obj.String() + "x")
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case reflect.Bool:
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obj.SetBool(!obj.Bool())
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case reflect.Float32, reflect.Float64:
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obj.SetFloat(obj.Float()*2.0 + 1.0)
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case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
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obj.SetInt(obj.Int() + 1)
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case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
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obj.SetUint(obj.Uint() + 1)
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default:
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}
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}
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}
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