William Kurkian | ea86948 | 2019-04-09 15:16:11 -0400 | [diff] [blame] | 1 | package sarama |
| 2 | |
| 3 | import ( |
| 4 | "encoding/binary" |
khenaidoo | 106c61a | 2021-08-11 18:05:46 -0400 | [diff] [blame] | 5 | "errors" |
William Kurkian | ea86948 | 2019-04-09 15:16:11 -0400 | [diff] [blame] | 6 | "fmt" |
| 7 | "math" |
| 8 | |
| 9 | "github.com/rcrowley/go-metrics" |
| 10 | ) |
| 11 | |
| 12 | type prepEncoder struct { |
| 13 | stack []pushEncoder |
| 14 | length int |
| 15 | } |
| 16 | |
| 17 | // primitives |
| 18 | |
| 19 | func (pe *prepEncoder) putInt8(in int8) { |
| 20 | pe.length++ |
| 21 | } |
| 22 | |
| 23 | func (pe *prepEncoder) putInt16(in int16) { |
| 24 | pe.length += 2 |
| 25 | } |
| 26 | |
| 27 | func (pe *prepEncoder) putInt32(in int32) { |
| 28 | pe.length += 4 |
| 29 | } |
| 30 | |
| 31 | func (pe *prepEncoder) putInt64(in int64) { |
| 32 | pe.length += 8 |
| 33 | } |
| 34 | |
| 35 | func (pe *prepEncoder) putVarint(in int64) { |
| 36 | var buf [binary.MaxVarintLen64]byte |
| 37 | pe.length += binary.PutVarint(buf[:], in) |
| 38 | } |
| 39 | |
khenaidoo | 106c61a | 2021-08-11 18:05:46 -0400 | [diff] [blame] | 40 | func (pe *prepEncoder) putUVarint(in uint64) { |
| 41 | var buf [binary.MaxVarintLen64]byte |
| 42 | pe.length += binary.PutUvarint(buf[:], in) |
| 43 | } |
| 44 | |
William Kurkian | ea86948 | 2019-04-09 15:16:11 -0400 | [diff] [blame] | 45 | func (pe *prepEncoder) putArrayLength(in int) error { |
| 46 | if in > math.MaxInt32 { |
| 47 | return PacketEncodingError{fmt.Sprintf("array too long (%d)", in)} |
| 48 | } |
| 49 | pe.length += 4 |
| 50 | return nil |
| 51 | } |
| 52 | |
khenaidoo | 106c61a | 2021-08-11 18:05:46 -0400 | [diff] [blame] | 53 | func (pe *prepEncoder) putCompactArrayLength(in int) { |
| 54 | pe.putUVarint(uint64(in + 1)) |
| 55 | } |
| 56 | |
William Kurkian | ea86948 | 2019-04-09 15:16:11 -0400 | [diff] [blame] | 57 | func (pe *prepEncoder) putBool(in bool) { |
| 58 | pe.length++ |
| 59 | } |
| 60 | |
| 61 | // arrays |
| 62 | |
| 63 | func (pe *prepEncoder) putBytes(in []byte) error { |
| 64 | pe.length += 4 |
| 65 | if in == nil { |
| 66 | return nil |
| 67 | } |
| 68 | return pe.putRawBytes(in) |
| 69 | } |
| 70 | |
| 71 | func (pe *prepEncoder) putVarintBytes(in []byte) error { |
| 72 | if in == nil { |
| 73 | pe.putVarint(-1) |
| 74 | return nil |
| 75 | } |
| 76 | pe.putVarint(int64(len(in))) |
| 77 | return pe.putRawBytes(in) |
| 78 | } |
| 79 | |
khenaidoo | 106c61a | 2021-08-11 18:05:46 -0400 | [diff] [blame] | 80 | func (pe *prepEncoder) putCompactBytes(in []byte) error { |
| 81 | pe.putUVarint(uint64(len(in) + 1)) |
| 82 | return pe.putRawBytes(in) |
| 83 | } |
| 84 | |
| 85 | func (pe *prepEncoder) putCompactString(in string) error { |
| 86 | pe.putCompactArrayLength(len(in)) |
| 87 | return pe.putRawBytes([]byte(in)) |
| 88 | } |
| 89 | |
| 90 | func (pe *prepEncoder) putNullableCompactString(in *string) error { |
| 91 | if in == nil { |
| 92 | pe.putUVarint(0) |
| 93 | return nil |
| 94 | } else { |
| 95 | return pe.putCompactString(*in) |
| 96 | } |
| 97 | } |
| 98 | |
William Kurkian | ea86948 | 2019-04-09 15:16:11 -0400 | [diff] [blame] | 99 | func (pe *prepEncoder) putRawBytes(in []byte) error { |
| 100 | if len(in) > math.MaxInt32 { |
| 101 | return PacketEncodingError{fmt.Sprintf("byteslice too long (%d)", len(in))} |
| 102 | } |
| 103 | pe.length += len(in) |
| 104 | return nil |
| 105 | } |
| 106 | |
| 107 | func (pe *prepEncoder) putNullableString(in *string) error { |
| 108 | if in == nil { |
| 109 | pe.length += 2 |
| 110 | return nil |
| 111 | } |
| 112 | return pe.putString(*in) |
| 113 | } |
| 114 | |
| 115 | func (pe *prepEncoder) putString(in string) error { |
| 116 | pe.length += 2 |
| 117 | if len(in) > math.MaxInt16 { |
| 118 | return PacketEncodingError{fmt.Sprintf("string too long (%d)", len(in))} |
| 119 | } |
| 120 | pe.length += len(in) |
| 121 | return nil |
| 122 | } |
| 123 | |
| 124 | func (pe *prepEncoder) putStringArray(in []string) error { |
| 125 | err := pe.putArrayLength(len(in)) |
| 126 | if err != nil { |
| 127 | return err |
| 128 | } |
| 129 | |
| 130 | for _, str := range in { |
| 131 | if err := pe.putString(str); err != nil { |
| 132 | return err |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | return nil |
| 137 | } |
| 138 | |
khenaidoo | 106c61a | 2021-08-11 18:05:46 -0400 | [diff] [blame] | 139 | func (pe *prepEncoder) putCompactInt32Array(in []int32) error { |
| 140 | if in == nil { |
| 141 | return errors.New("expected int32 array to be non null") |
| 142 | } |
| 143 | |
| 144 | pe.putUVarint(uint64(len(in)) + 1) |
| 145 | pe.length += 4 * len(in) |
| 146 | return nil |
| 147 | } |
| 148 | |
| 149 | func (pe *prepEncoder) putNullableCompactInt32Array(in []int32) error { |
| 150 | if in == nil { |
| 151 | pe.putUVarint(0) |
| 152 | return nil |
| 153 | } |
| 154 | |
| 155 | pe.putUVarint(uint64(len(in)) + 1) |
| 156 | pe.length += 4 * len(in) |
| 157 | return nil |
| 158 | } |
| 159 | |
William Kurkian | ea86948 | 2019-04-09 15:16:11 -0400 | [diff] [blame] | 160 | func (pe *prepEncoder) putInt32Array(in []int32) error { |
| 161 | err := pe.putArrayLength(len(in)) |
| 162 | if err != nil { |
| 163 | return err |
| 164 | } |
| 165 | pe.length += 4 * len(in) |
| 166 | return nil |
| 167 | } |
| 168 | |
| 169 | func (pe *prepEncoder) putInt64Array(in []int64) error { |
| 170 | err := pe.putArrayLength(len(in)) |
| 171 | if err != nil { |
| 172 | return err |
| 173 | } |
| 174 | pe.length += 8 * len(in) |
| 175 | return nil |
| 176 | } |
| 177 | |
khenaidoo | 106c61a | 2021-08-11 18:05:46 -0400 | [diff] [blame] | 178 | func (pe *prepEncoder) putEmptyTaggedFieldArray() { |
| 179 | pe.putUVarint(0) |
| 180 | } |
| 181 | |
William Kurkian | ea86948 | 2019-04-09 15:16:11 -0400 | [diff] [blame] | 182 | func (pe *prepEncoder) offset() int { |
| 183 | return pe.length |
| 184 | } |
| 185 | |
| 186 | // stackable |
| 187 | |
| 188 | func (pe *prepEncoder) push(in pushEncoder) { |
| 189 | in.saveOffset(pe.length) |
| 190 | pe.length += in.reserveLength() |
| 191 | pe.stack = append(pe.stack, in) |
| 192 | } |
| 193 | |
| 194 | func (pe *prepEncoder) pop() error { |
| 195 | in := pe.stack[len(pe.stack)-1] |
| 196 | pe.stack = pe.stack[:len(pe.stack)-1] |
| 197 | if dpe, ok := in.(dynamicPushEncoder); ok { |
| 198 | pe.length += dpe.adjustLength(pe.length) |
| 199 | } |
| 200 | |
| 201 | return nil |
| 202 | } |
| 203 | |
| 204 | // we do not record metrics during the prep encoder pass |
| 205 | func (pe *prepEncoder) metricRegistry() metrics.Registry { |
| 206 | return nil |
| 207 | } |