1package json 2 3import ( 4 "fmt" 5 "math" 6 "net" 7 "strconv" 8) 9 10// AppendNil inserts a 'Nil' object into the dst byte array. 11func (Encoder) AppendNil(dst []byte) []byte { 12 return append(dst, "null"...) 13} 14 15// AppendBeginMarker inserts a map start into the dst byte array. 16func (Encoder) AppendBeginMarker(dst []byte) []byte { 17 return append(dst, '{') 18} 19 20// AppendEndMarker inserts a map end into the dst byte array. 21func (Encoder) AppendEndMarker(dst []byte) []byte { 22 return append(dst, '}') 23} 24 25// AppendLineBreak appends a line break. 26func (Encoder) AppendLineBreak(dst []byte) []byte { 27 return append(dst, '\n') 28} 29 30// AppendArrayStart adds markers to indicate the start of an array. 31func (Encoder) AppendArrayStart(dst []byte) []byte { 32 return append(dst, '[') 33} 34 35// AppendArrayEnd adds markers to indicate the end of an array. 36func (Encoder) AppendArrayEnd(dst []byte) []byte { 37 return append(dst, ']') 38} 39 40// AppendArrayDelim adds markers to indicate end of a particular array element. 41func (Encoder) AppendArrayDelim(dst []byte) []byte { 42 if len(dst) > 0 { 43 return append(dst, ',') 44 } 45 return dst 46} 47 48// AppendBool converts the input bool to a string and 49// appends the encoded string to the input byte slice. 50func (Encoder) AppendBool(dst []byte, val bool) []byte { 51 return strconv.AppendBool(dst, val) 52} 53 54// AppendBools encodes the input bools to json and 55// appends the encoded string list to the input byte slice. 56func (Encoder) AppendBools(dst []byte, vals []bool) []byte { 57 if len(vals) == 0 { 58 return append(dst, '[', ']') 59 } 60 dst = append(dst, '[') 61 dst = strconv.AppendBool(dst, vals[0]) 62 if len(vals) > 1 { 63 for _, val := range vals[1:] { 64 dst = strconv.AppendBool(append(dst, ','), val) 65 } 66 } 67 dst = append(dst, ']') 68 return dst 69} 70 71// AppendInt converts the input int to a string and 72// appends the encoded string to the input byte slice. 73func (Encoder) AppendInt(dst []byte, val int) []byte { 74 return strconv.AppendInt(dst, int64(val), 10) 75} 76 77// AppendInts encodes the input ints to json and 78// appends the encoded string list to the input byte slice. 79func (Encoder) AppendInts(dst []byte, vals []int) []byte { 80 if len(vals) == 0 { 81 return append(dst, '[', ']') 82 } 83 dst = append(dst, '[') 84 dst = strconv.AppendInt(dst, int64(vals[0]), 10) 85 if len(vals) > 1 { 86 for _, val := range vals[1:] { 87 dst = strconv.AppendInt(append(dst, ','), int64(val), 10) 88 } 89 } 90 dst = append(dst, ']') 91 return dst 92} 93 94// AppendInt8 converts the input []int8 to a string and 95// appends the encoded string to the input byte slice. 96func (Encoder) AppendInt8(dst []byte, val int8) []byte { 97 return strconv.AppendInt(dst, int64(val), 10) 98} 99 100// AppendInts8 encodes the input int8s to json and 101// appends the encoded string list to the input byte slice. 102func (Encoder) AppendInts8(dst []byte, vals []int8) []byte { 103 if len(vals) == 0 { 104 return append(dst, '[', ']') 105 } 106 dst = append(dst, '[') 107 dst = strconv.AppendInt(dst, int64(vals[0]), 10) 108 if len(vals) > 1 { 109 for _, val := range vals[1:] { 110 dst = strconv.AppendInt(append(dst, ','), int64(val), 10) 111 } 112 } 113 dst = append(dst, ']') 114 return dst 115} 116 117// AppendInt16 converts the input int16 to a string and 118// appends the encoded string to the input byte slice. 119func (Encoder) AppendInt16(dst []byte, val int16) []byte { 120 return strconv.AppendInt(dst, int64(val), 10) 121} 122 123// AppendInts16 encodes the input int16s to json and 124// appends the encoded string list to the input byte slice. 125func (Encoder) AppendInts16(dst []byte, vals []int16) []byte { 126 if len(vals) == 0 { 127 return append(dst, '[', ']') 128 } 129 dst = append(dst, '[') 130 dst = strconv.AppendInt(dst, int64(vals[0]), 10) 131 if len(vals) > 1 { 132 for _, val := range vals[1:] { 133 dst = strconv.AppendInt(append(dst, ','), int64(val), 10) 134 } 135 } 136 dst = append(dst, ']') 137 return dst 138} 139 140// AppendInt32 converts the input int32 to a string and 141// appends the encoded string to the input byte slice. 142func (Encoder) AppendInt32(dst []byte, val int32) []byte { 143 return strconv.AppendInt(dst, int64(val), 10) 144} 145 146// AppendInts32 encodes the input int32s to json and 147// appends the encoded string list to the input byte slice. 148func (Encoder) AppendInts32(dst []byte, vals []int32) []byte { 149 if len(vals) == 0 { 150 return append(dst, '[', ']') 151 } 152 dst = append(dst, '[') 153 dst = strconv.AppendInt(dst, int64(vals[0]), 10) 154 if len(vals) > 1 { 155 for _, val := range vals[1:] { 156 dst = strconv.AppendInt(append(dst, ','), int64(val), 10) 157 } 158 } 159 dst = append(dst, ']') 160 return dst 161} 162 163// AppendInt64 converts the input int64 to a string and 164// appends the encoded string to the input byte slice. 165func (Encoder) AppendInt64(dst []byte, val int64) []byte { 166 return strconv.AppendInt(dst, val, 10) 167} 168 169// AppendInts64 encodes the input int64s to json and 170// appends the encoded string list to the input byte slice. 171func (Encoder) AppendInts64(dst []byte, vals []int64) []byte { 172 if len(vals) == 0 { 173 return append(dst, '[', ']') 174 } 175 dst = append(dst, '[') 176 dst = strconv.AppendInt(dst, vals[0], 10) 177 if len(vals) > 1 { 178 for _, val := range vals[1:] { 179 dst = strconv.AppendInt(append(dst, ','), val, 10) 180 } 181 } 182 dst = append(dst, ']') 183 return dst 184} 185 186// AppendUint converts the input uint to a string and 187// appends the encoded string to the input byte slice. 188func (Encoder) AppendUint(dst []byte, val uint) []byte { 189 return strconv.AppendUint(dst, uint64(val), 10) 190} 191 192// AppendUints encodes the input uints to json and 193// appends the encoded string list to the input byte slice. 194func (Encoder) AppendUints(dst []byte, vals []uint) []byte { 195 if len(vals) == 0 { 196 return append(dst, '[', ']') 197 } 198 dst = append(dst, '[') 199 dst = strconv.AppendUint(dst, uint64(vals[0]), 10) 200 if len(vals) > 1 { 201 for _, val := range vals[1:] { 202 dst = strconv.AppendUint(append(dst, ','), uint64(val), 10) 203 } 204 } 205 dst = append(dst, ']') 206 return dst 207} 208 209// AppendUint8 converts the input uint8 to a string and 210// appends the encoded string to the input byte slice. 211func (Encoder) AppendUint8(dst []byte, val uint8) []byte { 212 return strconv.AppendUint(dst, uint64(val), 10) 213} 214 215// AppendUints8 encodes the input uint8s to json and 216// appends the encoded string list to the input byte slice. 217func (Encoder) AppendUints8(dst []byte, vals []uint8) []byte { 218 if len(vals) == 0 { 219 return append(dst, '[', ']') 220 } 221 dst = append(dst, '[') 222 dst = strconv.AppendUint(dst, uint64(vals[0]), 10) 223 if len(vals) > 1 { 224 for _, val := range vals[1:] { 225 dst = strconv.AppendUint(append(dst, ','), uint64(val), 10) 226 } 227 } 228 dst = append(dst, ']') 229 return dst 230} 231 232// AppendUint16 converts the input uint16 to a string and 233// appends the encoded string to the input byte slice. 234func (Encoder) AppendUint16(dst []byte, val uint16) []byte { 235 return strconv.AppendUint(dst, uint64(val), 10) 236} 237 238// AppendUints16 encodes the input uint16s to json and 239// appends the encoded string list to the input byte slice. 240func (Encoder) AppendUints16(dst []byte, vals []uint16) []byte { 241 if len(vals) == 0 { 242 return append(dst, '[', ']') 243 } 244 dst = append(dst, '[') 245 dst = strconv.AppendUint(dst, uint64(vals[0]), 10) 246 if len(vals) > 1 { 247 for _, val := range vals[1:] { 248 dst = strconv.AppendUint(append(dst, ','), uint64(val), 10) 249 } 250 } 251 dst = append(dst, ']') 252 return dst 253} 254 255// AppendUint32 converts the input uint32 to a string and 256// appends the encoded string to the input byte slice. 257func (Encoder) AppendUint32(dst []byte, val uint32) []byte { 258 return strconv.AppendUint(dst, uint64(val), 10) 259} 260 261// AppendUints32 encodes the input uint32s to json and 262// appends the encoded string list to the input byte slice. 263func (Encoder) AppendUints32(dst []byte, vals []uint32) []byte { 264 if len(vals) == 0 { 265 return append(dst, '[', ']') 266 } 267 dst = append(dst, '[') 268 dst = strconv.AppendUint(dst, uint64(vals[0]), 10) 269 if len(vals) > 1 { 270 for _, val := range vals[1:] { 271 dst = strconv.AppendUint(append(dst, ','), uint64(val), 10) 272 } 273 } 274 dst = append(dst, ']') 275 return dst 276} 277 278// AppendUint64 converts the input uint64 to a string and 279// appends the encoded string to the input byte slice. 280func (Encoder) AppendUint64(dst []byte, val uint64) []byte { 281 return strconv.AppendUint(dst, uint64(val), 10) 282} 283 284// AppendUints64 encodes the input uint64s to json and 285// appends the encoded string list to the input byte slice. 286func (Encoder) AppendUints64(dst []byte, vals []uint64) []byte { 287 if len(vals) == 0 { 288 return append(dst, '[', ']') 289 } 290 dst = append(dst, '[') 291 dst = strconv.AppendUint(dst, vals[0], 10) 292 if len(vals) > 1 { 293 for _, val := range vals[1:] { 294 dst = strconv.AppendUint(append(dst, ','), val, 10) 295 } 296 } 297 dst = append(dst, ']') 298 return dst 299} 300 301func appendFloat(dst []byte, val float64, bitSize int) []byte { 302 // JSON does not permit NaN or Infinity. A typical JSON encoder would fail 303 // with an error, but a logging library wants the data to get thru so we 304 // make a tradeoff and store those types as string. 305 switch { 306 case math.IsNaN(val): 307 return append(dst, `"NaN"`...) 308 case math.IsInf(val, 1): 309 return append(dst, `"+Inf"`...) 310 case math.IsInf(val, -1): 311 return append(dst, `"-Inf"`...) 312 } 313 return strconv.AppendFloat(dst, val, 'f', -1, bitSize) 314} 315 316// AppendFloat32 converts the input float32 to a string and 317// appends the encoded string to the input byte slice. 318func (Encoder) AppendFloat32(dst []byte, val float32) []byte { 319 return appendFloat(dst, float64(val), 32) 320} 321 322// AppendFloats32 encodes the input float32s to json and 323// appends the encoded string list to the input byte slice. 324func (Encoder) AppendFloats32(dst []byte, vals []float32) []byte { 325 if len(vals) == 0 { 326 return append(dst, '[', ']') 327 } 328 dst = append(dst, '[') 329 dst = appendFloat(dst, float64(vals[0]), 32) 330 if len(vals) > 1 { 331 for _, val := range vals[1:] { 332 dst = appendFloat(append(dst, ','), float64(val), 32) 333 } 334 } 335 dst = append(dst, ']') 336 return dst 337} 338 339// AppendFloat64 converts the input float64 to a string and 340// appends the encoded string to the input byte slice. 341func (Encoder) AppendFloat64(dst []byte, val float64) []byte { 342 return appendFloat(dst, val, 64) 343} 344 345// AppendFloats64 encodes the input float64s to json and 346// appends the encoded string list to the input byte slice. 347func (Encoder) AppendFloats64(dst []byte, vals []float64) []byte { 348 if len(vals) == 0 { 349 return append(dst, '[', ']') 350 } 351 dst = append(dst, '[') 352 dst = appendFloat(dst, vals[0], 64) 353 if len(vals) > 1 { 354 for _, val := range vals[1:] { 355 dst = appendFloat(append(dst, ','), val, 64) 356 } 357 } 358 dst = append(dst, ']') 359 return dst 360} 361 362// AppendInterface marshals the input interface to a string and 363// appends the encoded string to the input byte slice. 364func (e Encoder) AppendInterface(dst []byte, i interface{}) []byte { 365 marshaled, err := JSONMarshalFunc(i) 366 if err != nil { 367 return e.AppendString(dst, fmt.Sprintf("marshaling error: %v", err)) 368 } 369 return append(dst, marshaled...) 370} 371 372// AppendObjectData takes in an object that is already in a byte array 373// and adds it to the dst. 374func (Encoder) AppendObjectData(dst []byte, o []byte) []byte { 375 // Three conditions apply here: 376 // 1. new content starts with '{' - which should be dropped OR 377 // 2. new content starts with '{' - which should be replaced with ',' 378 // to separate with existing content OR 379 // 3. existing content has already other fields 380 if o[0] == '{' { 381 if len(dst) > 1 { 382 dst = append(dst, ',') 383 } 384 o = o[1:] 385 } else if len(dst) > 1 { 386 dst = append(dst, ',') 387 } 388 return append(dst, o...) 389} 390 391// AppendIPAddr adds IPv4 or IPv6 address to dst. 392func (e Encoder) AppendIPAddr(dst []byte, ip net.IP) []byte { 393 return e.AppendString(dst, ip.String()) 394} 395 396// AppendIPPrefix adds IPv4 or IPv6 Prefix (address & mask) to dst. 397func (e Encoder) AppendIPPrefix(dst []byte, pfx net.IPNet) []byte { 398 return e.AppendString(dst, pfx.String()) 399 400} 401 402// AppendMACAddr adds MAC address to dst. 403func (e Encoder) AppendMACAddr(dst []byte, ha net.HardwareAddr) []byte { 404 return e.AppendString(dst, ha.String()) 405} 406