Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 1 | package sarama |
| 2 | |
| 3 | import ( |
| 4 | "encoding/binary" |
khenaidoo | 2672188 | 2021-08-11 17:42:52 -0400 | [diff] [blame] | 5 | "errors" |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 6 | |
| 7 | "github.com/rcrowley/go-metrics" |
| 8 | ) |
| 9 | |
| 10 | type realEncoder struct { |
| 11 | raw []byte |
| 12 | off int |
| 13 | stack []pushEncoder |
| 14 | registry metrics.Registry |
| 15 | } |
| 16 | |
| 17 | // primitives |
| 18 | |
| 19 | func (re *realEncoder) putInt8(in int8) { |
| 20 | re.raw[re.off] = byte(in) |
| 21 | re.off++ |
| 22 | } |
| 23 | |
| 24 | func (re *realEncoder) putInt16(in int16) { |
| 25 | binary.BigEndian.PutUint16(re.raw[re.off:], uint16(in)) |
| 26 | re.off += 2 |
| 27 | } |
| 28 | |
| 29 | func (re *realEncoder) putInt32(in int32) { |
| 30 | binary.BigEndian.PutUint32(re.raw[re.off:], uint32(in)) |
| 31 | re.off += 4 |
| 32 | } |
| 33 | |
| 34 | func (re *realEncoder) putInt64(in int64) { |
| 35 | binary.BigEndian.PutUint64(re.raw[re.off:], uint64(in)) |
| 36 | re.off += 8 |
| 37 | } |
| 38 | |
| 39 | func (re *realEncoder) putVarint(in int64) { |
| 40 | re.off += binary.PutVarint(re.raw[re.off:], in) |
| 41 | } |
| 42 | |
khenaidoo | 2672188 | 2021-08-11 17:42:52 -0400 | [diff] [blame] | 43 | func (re *realEncoder) putUVarint(in uint64) { |
| 44 | re.off += binary.PutUvarint(re.raw[re.off:], in) |
| 45 | } |
| 46 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 47 | func (re *realEncoder) putArrayLength(in int) error { |
| 48 | re.putInt32(int32(in)) |
| 49 | return nil |
| 50 | } |
| 51 | |
khenaidoo | 2672188 | 2021-08-11 17:42:52 -0400 | [diff] [blame] | 52 | func (re *realEncoder) putCompactArrayLength(in int) { |
| 53 | // 0 represents a null array, so +1 has to be added |
| 54 | re.putUVarint(uint64(in + 1)) |
| 55 | } |
| 56 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 57 | func (re *realEncoder) putBool(in bool) { |
| 58 | if in { |
| 59 | re.putInt8(1) |
| 60 | return |
| 61 | } |
| 62 | re.putInt8(0) |
| 63 | } |
| 64 | |
| 65 | // collection |
| 66 | |
| 67 | func (re *realEncoder) putRawBytes(in []byte) error { |
| 68 | copy(re.raw[re.off:], in) |
| 69 | re.off += len(in) |
| 70 | return nil |
| 71 | } |
| 72 | |
| 73 | func (re *realEncoder) putBytes(in []byte) error { |
| 74 | if in == nil { |
| 75 | re.putInt32(-1) |
| 76 | return nil |
| 77 | } |
| 78 | re.putInt32(int32(len(in))) |
| 79 | return re.putRawBytes(in) |
| 80 | } |
| 81 | |
| 82 | func (re *realEncoder) putVarintBytes(in []byte) error { |
| 83 | if in == nil { |
| 84 | re.putVarint(-1) |
| 85 | return nil |
| 86 | } |
| 87 | re.putVarint(int64(len(in))) |
| 88 | return re.putRawBytes(in) |
| 89 | } |
| 90 | |
khenaidoo | 2672188 | 2021-08-11 17:42:52 -0400 | [diff] [blame] | 91 | func (re *realEncoder) putCompactBytes(in []byte) error { |
| 92 | re.putUVarint(uint64(len(in) + 1)) |
| 93 | return re.putRawBytes(in) |
| 94 | } |
| 95 | |
| 96 | func (re *realEncoder) putCompactString(in string) error { |
| 97 | re.putCompactArrayLength(len(in)) |
| 98 | return re.putRawBytes([]byte(in)) |
| 99 | } |
| 100 | |
| 101 | func (re *realEncoder) putNullableCompactString(in *string) error { |
| 102 | if in == nil { |
| 103 | re.putInt8(0) |
| 104 | return nil |
| 105 | } |
| 106 | return re.putCompactString(*in) |
| 107 | } |
| 108 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 109 | func (re *realEncoder) putString(in string) error { |
| 110 | re.putInt16(int16(len(in))) |
| 111 | copy(re.raw[re.off:], in) |
| 112 | re.off += len(in) |
| 113 | return nil |
| 114 | } |
| 115 | |
| 116 | func (re *realEncoder) putNullableString(in *string) error { |
| 117 | if in == nil { |
| 118 | re.putInt16(-1) |
| 119 | return nil |
| 120 | } |
| 121 | return re.putString(*in) |
| 122 | } |
| 123 | |
| 124 | func (re *realEncoder) putStringArray(in []string) error { |
| 125 | err := re.putArrayLength(len(in)) |
| 126 | if err != nil { |
| 127 | return err |
| 128 | } |
| 129 | |
| 130 | for _, val := range in { |
| 131 | if err := re.putString(val); err != nil { |
| 132 | return err |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | return nil |
| 137 | } |
| 138 | |
khenaidoo | 2672188 | 2021-08-11 17:42:52 -0400 | [diff] [blame] | 139 | func (re *realEncoder) putCompactInt32Array(in []int32) error { |
| 140 | if in == nil { |
| 141 | return errors.New("expected int32 array to be non null") |
| 142 | } |
| 143 | // 0 represents a null array, so +1 has to be added |
| 144 | re.putUVarint(uint64(len(in)) + 1) |
| 145 | for _, val := range in { |
| 146 | re.putInt32(val) |
| 147 | } |
| 148 | return nil |
| 149 | } |
| 150 | |
| 151 | func (re *realEncoder) putNullableCompactInt32Array(in []int32) error { |
| 152 | if in == nil { |
| 153 | re.putUVarint(0) |
| 154 | return nil |
| 155 | } |
| 156 | // 0 represents a null array, so +1 has to be added |
| 157 | re.putUVarint(uint64(len(in)) + 1) |
| 158 | for _, val := range in { |
| 159 | re.putInt32(val) |
| 160 | } |
| 161 | return nil |
| 162 | } |
| 163 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 164 | func (re *realEncoder) putInt32Array(in []int32) error { |
| 165 | err := re.putArrayLength(len(in)) |
| 166 | if err != nil { |
| 167 | return err |
| 168 | } |
| 169 | for _, val := range in { |
| 170 | re.putInt32(val) |
| 171 | } |
| 172 | return nil |
| 173 | } |
| 174 | |
| 175 | func (re *realEncoder) putInt64Array(in []int64) error { |
| 176 | err := re.putArrayLength(len(in)) |
| 177 | if err != nil { |
| 178 | return err |
| 179 | } |
| 180 | for _, val := range in { |
| 181 | re.putInt64(val) |
| 182 | } |
| 183 | return nil |
| 184 | } |
| 185 | |
khenaidoo | 2672188 | 2021-08-11 17:42:52 -0400 | [diff] [blame] | 186 | func (re *realEncoder) putEmptyTaggedFieldArray() { |
| 187 | re.putUVarint(0) |
| 188 | } |
| 189 | |
Scott Baker | 2c1c482 | 2019-10-16 11:02:41 -0700 | [diff] [blame] | 190 | func (re *realEncoder) offset() int { |
| 191 | return re.off |
| 192 | } |
| 193 | |
| 194 | // stacks |
| 195 | |
| 196 | func (re *realEncoder) push(in pushEncoder) { |
| 197 | in.saveOffset(re.off) |
| 198 | re.off += in.reserveLength() |
| 199 | re.stack = append(re.stack, in) |
| 200 | } |
| 201 | |
| 202 | func (re *realEncoder) pop() error { |
| 203 | // this is go's ugly pop pattern (the inverse of append) |
| 204 | in := re.stack[len(re.stack)-1] |
| 205 | re.stack = re.stack[:len(re.stack)-1] |
| 206 | |
| 207 | return in.run(re.off, re.raw) |
| 208 | } |
| 209 | |
| 210 | // we do record metrics during the real encoder pass |
| 211 | func (re *realEncoder) metricRegistry() metrics.Registry { |
| 212 | return re.registry |
| 213 | } |