Scott Baker | 105df15 | 2020-04-13 15:55:14 -0700 | [diff] [blame^] | 1 | // Copyright 2019 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // +build purego appengine |
| 6 | |
| 7 | package impl |
| 8 | |
| 9 | import ( |
| 10 | "reflect" |
| 11 | |
| 12 | "google.golang.org/protobuf/encoding/protowire" |
| 13 | ) |
| 14 | |
| 15 | func sizeEnum(p pointer, f *coderFieldInfo, _ marshalOptions) (size int) { |
| 16 | v := p.v.Elem().Int() |
| 17 | return f.tagsize + protowire.SizeVarint(uint64(v)) |
| 18 | } |
| 19 | |
| 20 | func appendEnum(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { |
| 21 | v := p.v.Elem().Int() |
| 22 | b = protowire.AppendVarint(b, f.wiretag) |
| 23 | b = protowire.AppendVarint(b, uint64(v)) |
| 24 | return b, nil |
| 25 | } |
| 26 | |
| 27 | func consumeEnum(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, _ unmarshalOptions) (out unmarshalOutput, err error) { |
| 28 | if wtyp != protowire.VarintType { |
| 29 | return out, errUnknown |
| 30 | } |
| 31 | v, n := protowire.ConsumeVarint(b) |
| 32 | if n < 0 { |
| 33 | return out, protowire.ParseError(n) |
| 34 | } |
| 35 | p.v.Elem().SetInt(int64(v)) |
| 36 | out.n = n |
| 37 | return out, nil |
| 38 | } |
| 39 | |
| 40 | func mergeEnum(dst, src pointer, _ *coderFieldInfo, _ mergeOptions) { |
| 41 | dst.v.Elem().Set(src.v.Elem()) |
| 42 | } |
| 43 | |
| 44 | var coderEnum = pointerCoderFuncs{ |
| 45 | size: sizeEnum, |
| 46 | marshal: appendEnum, |
| 47 | unmarshal: consumeEnum, |
| 48 | merge: mergeEnum, |
| 49 | } |
| 50 | |
| 51 | func sizeEnumNoZero(p pointer, f *coderFieldInfo, opts marshalOptions) (size int) { |
| 52 | if p.v.Elem().Int() == 0 { |
| 53 | return 0 |
| 54 | } |
| 55 | return sizeEnum(p, f, opts) |
| 56 | } |
| 57 | |
| 58 | func appendEnumNoZero(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { |
| 59 | if p.v.Elem().Int() == 0 { |
| 60 | return b, nil |
| 61 | } |
| 62 | return appendEnum(b, p, f, opts) |
| 63 | } |
| 64 | |
| 65 | func mergeEnumNoZero(dst, src pointer, _ *coderFieldInfo, _ mergeOptions) { |
| 66 | if src.v.Elem().Int() != 0 { |
| 67 | dst.v.Elem().Set(src.v.Elem()) |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | var coderEnumNoZero = pointerCoderFuncs{ |
| 72 | size: sizeEnumNoZero, |
| 73 | marshal: appendEnumNoZero, |
| 74 | unmarshal: consumeEnum, |
| 75 | merge: mergeEnumNoZero, |
| 76 | } |
| 77 | |
| 78 | func sizeEnumPtr(p pointer, f *coderFieldInfo, opts marshalOptions) (size int) { |
| 79 | return sizeEnum(pointer{p.v.Elem()}, f, opts) |
| 80 | } |
| 81 | |
| 82 | func appendEnumPtr(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { |
| 83 | return appendEnum(b, pointer{p.v.Elem()}, f, opts) |
| 84 | } |
| 85 | |
| 86 | func consumeEnumPtr(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (out unmarshalOutput, err error) { |
| 87 | if wtyp != protowire.VarintType { |
| 88 | return out, errUnknown |
| 89 | } |
| 90 | if p.v.Elem().IsNil() { |
| 91 | p.v.Elem().Set(reflect.New(p.v.Elem().Type().Elem())) |
| 92 | } |
| 93 | return consumeEnum(b, pointer{p.v.Elem()}, wtyp, f, opts) |
| 94 | } |
| 95 | |
| 96 | func mergeEnumPtr(dst, src pointer, _ *coderFieldInfo, _ mergeOptions) { |
| 97 | if !src.v.Elem().IsNil() { |
| 98 | v := reflect.New(dst.v.Type().Elem().Elem()) |
| 99 | v.Elem().Set(src.v.Elem().Elem()) |
| 100 | dst.v.Elem().Set(v) |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | var coderEnumPtr = pointerCoderFuncs{ |
| 105 | size: sizeEnumPtr, |
| 106 | marshal: appendEnumPtr, |
| 107 | unmarshal: consumeEnumPtr, |
| 108 | merge: mergeEnumPtr, |
| 109 | } |
| 110 | |
| 111 | func sizeEnumSlice(p pointer, f *coderFieldInfo, opts marshalOptions) (size int) { |
| 112 | s := p.v.Elem() |
| 113 | for i, llen := 0, s.Len(); i < llen; i++ { |
| 114 | size += protowire.SizeVarint(uint64(s.Index(i).Int())) + f.tagsize |
| 115 | } |
| 116 | return size |
| 117 | } |
| 118 | |
| 119 | func appendEnumSlice(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { |
| 120 | s := p.v.Elem() |
| 121 | for i, llen := 0, s.Len(); i < llen; i++ { |
| 122 | b = protowire.AppendVarint(b, f.wiretag) |
| 123 | b = protowire.AppendVarint(b, uint64(s.Index(i).Int())) |
| 124 | } |
| 125 | return b, nil |
| 126 | } |
| 127 | |
| 128 | func consumeEnumSlice(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (out unmarshalOutput, err error) { |
| 129 | s := p.v.Elem() |
| 130 | if wtyp == protowire.BytesType { |
| 131 | b, n := protowire.ConsumeBytes(b) |
| 132 | if n < 0 { |
| 133 | return out, protowire.ParseError(n) |
| 134 | } |
| 135 | for len(b) > 0 { |
| 136 | v, n := protowire.ConsumeVarint(b) |
| 137 | if n < 0 { |
| 138 | return out, protowire.ParseError(n) |
| 139 | } |
| 140 | rv := reflect.New(s.Type().Elem()).Elem() |
| 141 | rv.SetInt(int64(v)) |
| 142 | s.Set(reflect.Append(s, rv)) |
| 143 | b = b[n:] |
| 144 | } |
| 145 | out.n = n |
| 146 | return out, nil |
| 147 | } |
| 148 | if wtyp != protowire.VarintType { |
| 149 | return out, errUnknown |
| 150 | } |
| 151 | v, n := protowire.ConsumeVarint(b) |
| 152 | if n < 0 { |
| 153 | return out, protowire.ParseError(n) |
| 154 | } |
| 155 | rv := reflect.New(s.Type().Elem()).Elem() |
| 156 | rv.SetInt(int64(v)) |
| 157 | s.Set(reflect.Append(s, rv)) |
| 158 | out.n = n |
| 159 | return out, nil |
| 160 | } |
| 161 | |
| 162 | func mergeEnumSlice(dst, src pointer, _ *coderFieldInfo, _ mergeOptions) { |
| 163 | dst.v.Elem().Set(reflect.AppendSlice(dst.v.Elem(), src.v.Elem())) |
| 164 | } |
| 165 | |
| 166 | var coderEnumSlice = pointerCoderFuncs{ |
| 167 | size: sizeEnumSlice, |
| 168 | marshal: appendEnumSlice, |
| 169 | unmarshal: consumeEnumSlice, |
| 170 | merge: mergeEnumSlice, |
| 171 | } |
| 172 | |
| 173 | func sizeEnumPackedSlice(p pointer, f *coderFieldInfo, opts marshalOptions) (size int) { |
| 174 | s := p.v.Elem() |
| 175 | llen := s.Len() |
| 176 | if llen == 0 { |
| 177 | return 0 |
| 178 | } |
| 179 | n := 0 |
| 180 | for i := 0; i < llen; i++ { |
| 181 | n += protowire.SizeVarint(uint64(s.Index(i).Int())) |
| 182 | } |
| 183 | return f.tagsize + protowire.SizeBytes(n) |
| 184 | } |
| 185 | |
| 186 | func appendEnumPackedSlice(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { |
| 187 | s := p.v.Elem() |
| 188 | llen := s.Len() |
| 189 | if llen == 0 { |
| 190 | return b, nil |
| 191 | } |
| 192 | b = protowire.AppendVarint(b, f.wiretag) |
| 193 | n := 0 |
| 194 | for i := 0; i < llen; i++ { |
| 195 | n += protowire.SizeVarint(uint64(s.Index(i).Int())) |
| 196 | } |
| 197 | b = protowire.AppendVarint(b, uint64(n)) |
| 198 | for i := 0; i < llen; i++ { |
| 199 | b = protowire.AppendVarint(b, uint64(s.Index(i).Int())) |
| 200 | } |
| 201 | return b, nil |
| 202 | } |
| 203 | |
| 204 | var coderEnumPackedSlice = pointerCoderFuncs{ |
| 205 | size: sizeEnumPackedSlice, |
| 206 | marshal: appendEnumPackedSlice, |
| 207 | unmarshal: consumeEnumSlice, |
| 208 | merge: mergeEnumSlice, |
| 209 | } |