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