github.com/bytedance/mockey@v1.2.10/internal/monkey/common/transform.go (about)

     1  /*
     2   * Copyright 2022 ByteDance Inc.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *     http://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package common
    18  
    19  import (
    20  	"reflect"
    21  	"unsafe"
    22  )
    23  
    24  func PtrOf(val []byte) uintptr {
    25  	return (*reflect.SliceHeader)(unsafe.Pointer(&val)).Data
    26  }
    27  
    28  func PtrAt(val reflect.Value) uintptr {
    29  	type value struct {
    30  		_   uintptr
    31  		ptr unsafe.Pointer
    32  	}
    33  	return uintptr((*value)(unsafe.Pointer(&val)).ptr)
    34  }
    35  
    36  func BytesOf(addr uintptr, size int) (res []byte) {
    37  	h := (*reflect.SliceHeader)(unsafe.Pointer(&res))
    38  	h.Data = addr
    39  	h.Len = size
    40  	h.Cap = size
    41  	return res
    42  }