David K. Bainbridge | 215e024 | 2017-09-05 23:18:24 -0700 | [diff] [blame] | 1 | // Protocol Buffers for Go with Gadgets |
| 2 | // |
| 3 | // Copyright (c) 2013, 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 | package proto |
| 30 | |
| 31 | import ( |
| 32 | "reflect" |
| 33 | ) |
| 34 | |
| 35 | // Decode a reference to a struct pointer. |
| 36 | func (o *Buffer) dec_ref_struct_message(p *Properties, base structPointer) (err error) { |
| 37 | raw, e := o.DecodeRawBytes(false) |
| 38 | if e != nil { |
| 39 | return e |
| 40 | } |
| 41 | |
| 42 | // If the object can unmarshal itself, let it. |
| 43 | if p.isUnmarshaler { |
| 44 | panic("not supported, since this is a pointer receiver") |
| 45 | } |
| 46 | |
| 47 | obuf := o.buf |
| 48 | oi := o.index |
| 49 | o.buf = raw |
| 50 | o.index = 0 |
| 51 | |
| 52 | bas := structPointer_FieldPointer(base, p.field) |
| 53 | |
| 54 | err = o.unmarshalType(p.stype, p.sprop, false, bas) |
| 55 | o.buf = obuf |
| 56 | o.index = oi |
| 57 | |
| 58 | return err |
| 59 | } |
| 60 | |
| 61 | // Decode a slice of references to struct pointers ([]struct). |
| 62 | func (o *Buffer) dec_slice_ref_struct(p *Properties, is_group bool, base structPointer) error { |
| 63 | newBas := appendStructPointer(base, p.field, p.sstype) |
| 64 | |
| 65 | if is_group { |
| 66 | panic("not supported, maybe in future, if requested.") |
| 67 | } |
| 68 | |
| 69 | raw, err := o.DecodeRawBytes(false) |
| 70 | if err != nil { |
| 71 | return err |
| 72 | } |
| 73 | |
| 74 | // If the object can unmarshal itself, let it. |
| 75 | if p.isUnmarshaler { |
| 76 | panic("not supported, since this is not a pointer receiver.") |
| 77 | } |
| 78 | |
| 79 | obuf := o.buf |
| 80 | oi := o.index |
| 81 | o.buf = raw |
| 82 | o.index = 0 |
| 83 | |
| 84 | err = o.unmarshalType(p.stype, p.sprop, is_group, newBas) |
| 85 | |
| 86 | o.buf = obuf |
| 87 | o.index = oi |
| 88 | |
| 89 | return err |
| 90 | } |
| 91 | |
| 92 | // Decode a slice of references to struct pointers. |
| 93 | func (o *Buffer) dec_slice_ref_struct_message(p *Properties, base structPointer) error { |
| 94 | return o.dec_slice_ref_struct(p, false, base) |
| 95 | } |
| 96 | |
| 97 | func setPtrCustomType(base structPointer, f field, v interface{}) { |
| 98 | if v == nil { |
| 99 | return |
| 100 | } |
| 101 | structPointer_SetStructPointer(base, f, toStructPointer(reflect.ValueOf(v))) |
| 102 | } |
| 103 | |
| 104 | func setCustomType(base structPointer, f field, value interface{}) { |
| 105 | if value == nil { |
| 106 | return |
| 107 | } |
| 108 | v := reflect.ValueOf(value).Elem() |
| 109 | t := reflect.TypeOf(value).Elem() |
| 110 | kind := t.Kind() |
| 111 | switch kind { |
| 112 | case reflect.Slice: |
| 113 | slice := reflect.MakeSlice(t, v.Len(), v.Cap()) |
| 114 | reflect.Copy(slice, v) |
| 115 | oldHeader := structPointer_GetSliceHeader(base, f) |
| 116 | oldHeader.Data = slice.Pointer() |
| 117 | oldHeader.Len = v.Len() |
| 118 | oldHeader.Cap = v.Cap() |
| 119 | default: |
| 120 | size := reflect.TypeOf(value).Elem().Size() |
| 121 | structPointer_Copy(toStructPointer(reflect.ValueOf(value)), structPointer_Add(base, f), int(size)) |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | func (o *Buffer) dec_custom_bytes(p *Properties, base structPointer) error { |
| 126 | b, err := o.DecodeRawBytes(true) |
| 127 | if err != nil { |
| 128 | return err |
| 129 | } |
| 130 | i := reflect.New(p.ctype.Elem()).Interface() |
| 131 | custom := (i).(Unmarshaler) |
| 132 | if err := custom.Unmarshal(b); err != nil { |
| 133 | return err |
| 134 | } |
| 135 | setPtrCustomType(base, p.field, custom) |
| 136 | return nil |
| 137 | } |
| 138 | |
| 139 | func (o *Buffer) dec_custom_ref_bytes(p *Properties, base structPointer) error { |
| 140 | b, err := o.DecodeRawBytes(true) |
| 141 | if err != nil { |
| 142 | return err |
| 143 | } |
| 144 | i := reflect.New(p.ctype).Interface() |
| 145 | custom := (i).(Unmarshaler) |
| 146 | if err := custom.Unmarshal(b); err != nil { |
| 147 | return err |
| 148 | } |
| 149 | if custom != nil { |
| 150 | setCustomType(base, p.field, custom) |
| 151 | } |
| 152 | return nil |
| 153 | } |
| 154 | |
| 155 | // Decode a slice of bytes ([]byte) into a slice of custom types. |
| 156 | func (o *Buffer) dec_custom_slice_bytes(p *Properties, base structPointer) error { |
| 157 | b, err := o.DecodeRawBytes(true) |
| 158 | if err != nil { |
| 159 | return err |
| 160 | } |
| 161 | i := reflect.New(p.ctype.Elem()).Interface() |
| 162 | custom := (i).(Unmarshaler) |
| 163 | if err := custom.Unmarshal(b); err != nil { |
| 164 | return err |
| 165 | } |
| 166 | newBas := appendStructPointer(base, p.field, p.ctype) |
| 167 | |
| 168 | var zero field |
| 169 | setCustomType(newBas, zero, custom) |
| 170 | |
| 171 | return nil |
| 172 | } |