| divyadesai | 81bb7ba | 2020-03-11 11:45:23 +0000 | [diff] [blame] | 1 | // Protocol Buffers for Go with Gadgets |
| 2 | // |
| 3 | // Copyright (c) 2018, The GoGo Authors. All rights reserved. |
| 4 | // http://github.com/gogo/protobuf |
| 5 | // |
| 6 | // Redistribution and use in source and binary forms, with or without |
| 7 | // modification, are permitted provided that the following conditions are |
| 8 | // met: |
| 9 | // |
| 10 | // * Redistributions of source code must retain the above copyright |
| 11 | // notice, this list of conditions and the following disclaimer. |
| 12 | // * Redistributions in binary form must reproduce the above |
| 13 | // copyright notice, this list of conditions and the following disclaimer |
| 14 | // in the documentation and/or other materials provided with the |
| 15 | // distribution. |
| 16 | // |
| 17 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 18 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 19 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 20 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 21 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 22 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 23 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 27 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | |
| 29 | // +build !purego,!appengine,!js |
| 30 | |
| 31 | // This file contains the implementation of the proto field accesses using package unsafe. |
| 32 | |
| 33 | package proto |
| 34 | |
| 35 | import ( |
| 36 | "reflect" |
| 37 | "unsafe" |
| 38 | ) |
| 39 | |
| 40 | func (p pointer) getRef() pointer { |
| 41 | return pointer{p: (unsafe.Pointer)(&p.p)} |
| 42 | } |
| 43 | |
| 44 | func (p pointer) appendRef(v pointer, typ reflect.Type) { |
| 45 | slice := p.getSlice(typ) |
| 46 | elem := v.asPointerTo(typ).Elem() |
| 47 | newSlice := reflect.Append(slice, elem) |
| 48 | slice.Set(newSlice) |
| 49 | } |
| 50 | |
| 51 | func (p pointer) getSlice(typ reflect.Type) reflect.Value { |
| 52 | sliceTyp := reflect.SliceOf(typ) |
| 53 | slice := p.asPointerTo(sliceTyp) |
| 54 | slice = slice.Elem() |
| 55 | return slice |
| 56 | } |