khenaidoo | ffe076b | 2019-01-15 16:08:08 -0500 | [diff] [blame^] | 1 | // +build codecgen.exec |
| 2 | |
| 3 | // Copyright (c) 2012-2018 Ugorji Nwoke. All rights reserved. |
| 4 | // Use of this source code is governed by a MIT license found in the LICENSE file. |
| 5 | |
| 6 | package codec |
| 7 | |
| 8 | import ( |
| 9 | "bytes" |
| 10 | "encoding/base64" |
| 11 | "errors" |
| 12 | "fmt" |
| 13 | "go/format" |
| 14 | "io" |
| 15 | "io/ioutil" |
| 16 | "math/rand" |
| 17 | "reflect" |
| 18 | "regexp" |
| 19 | "sort" |
| 20 | "strconv" |
| 21 | "strings" |
| 22 | "sync" |
| 23 | "text/template" |
| 24 | "time" |
| 25 | "unicode" |
| 26 | "unicode/utf8" |
| 27 | ) |
| 28 | |
| 29 | // --------------------------------------------------- |
| 30 | // codecgen supports the full cycle of reflection-based codec: |
| 31 | // - RawExt |
| 32 | // - Raw |
| 33 | // - Extensions |
| 34 | // - (Binary|Text|JSON)(Unm|M)arshal |
| 35 | // - generic by-kind |
| 36 | // |
| 37 | // This means that, for dynamic things, we MUST use reflection to at least get the reflect.Type. |
| 38 | // In those areas, we try to only do reflection or interface-conversion when NECESSARY: |
| 39 | // - Extensions, only if Extensions are configured. |
| 40 | // |
| 41 | // However, codecgen doesn't support the following: |
| 42 | // - Canonical option. (codecgen IGNORES it currently) |
| 43 | // This is just because it has not been implemented. |
| 44 | // |
| 45 | // During encode/decode, Selfer takes precedence. |
| 46 | // A type implementing Selfer will know how to encode/decode itself statically. |
| 47 | // |
| 48 | // The following field types are supported: |
| 49 | // array: [n]T |
| 50 | // slice: []T |
| 51 | // map: map[K]V |
| 52 | // primitive: [u]int[n], float(32|64), bool, string |
| 53 | // struct |
| 54 | // |
| 55 | // --------------------------------------------------- |
| 56 | // Note that a Selfer cannot call (e|d).(En|De)code on itself, |
| 57 | // as this will cause a circular reference, as (En|De)code will call Selfer methods. |
| 58 | // Any type that implements Selfer must implement completely and not fallback to (En|De)code. |
| 59 | // |
| 60 | // In addition, code in this file manages the generation of fast-path implementations of |
| 61 | // encode/decode of slices/maps of primitive keys/values. |
| 62 | // |
| 63 | // Users MUST re-generate their implementations whenever the code shape changes. |
| 64 | // The generated code will panic if it was generated with a version older than the supporting library. |
| 65 | // --------------------------------------------------- |
| 66 | // |
| 67 | // codec framework is very feature rich. |
| 68 | // When encoding or decoding into an interface, it depends on the runtime type of the interface. |
| 69 | // The type of the interface may be a named type, an extension, etc. |
| 70 | // Consequently, we fallback to runtime codec for encoding/decoding interfaces. |
| 71 | // In addition, we fallback for any value which cannot be guaranteed at runtime. |
| 72 | // This allows us support ANY value, including any named types, specifically those which |
| 73 | // do not implement our interfaces (e.g. Selfer). |
| 74 | // |
| 75 | // This explains some slowness compared to other code generation codecs (e.g. msgp). |
| 76 | // This reduction in speed is only seen when your refers to interfaces, |
| 77 | // e.g. type T struct { A interface{}; B []interface{}; C map[string]interface{} } |
| 78 | // |
| 79 | // codecgen will panic if the file was generated with an old version of the library in use. |
| 80 | // |
| 81 | // Note: |
| 82 | // It was a conscious decision to have gen.go always explicitly call EncodeNil or TryDecodeAsNil. |
| 83 | // This way, there isn't a function call overhead just to see that we should not enter a block of code. |
| 84 | // |
| 85 | // Note: |
| 86 | // codecgen-generated code depends on the variables defined by fast-path.generated.go. |
| 87 | // consequently, you cannot run with tags "codecgen notfastpath". |
| 88 | |
| 89 | // GenVersion is the current version of codecgen. |
| 90 | // |
| 91 | // NOTE: Increment this value each time codecgen changes fundamentally. |
| 92 | // Fundamental changes are: |
| 93 | // - helper methods change (signature change, new ones added, some removed, etc) |
| 94 | // - codecgen command line changes |
| 95 | // |
| 96 | // v1: Initial Version |
| 97 | // v2: |
| 98 | // v3: Changes for Kubernetes: |
| 99 | // changes in signature of some unpublished helper methods and codecgen cmdline arguments. |
| 100 | // v4: Removed separator support from (en|de)cDriver, and refactored codec(gen) |
| 101 | // v5: changes to support faster json decoding. Let encoder/decoder maintain state of collections. |
| 102 | // v6: removed unsafe from gen, and now uses codecgen.exec tag |
| 103 | // v7: |
| 104 | // v8: current - we now maintain compatibility with old generated code. |
| 105 | const genVersion = 8 |
| 106 | |
| 107 | const ( |
| 108 | genCodecPkg = "codec1978" |
| 109 | genTempVarPfx = "yy" |
| 110 | genTopLevelVarName = "x" |
| 111 | |
| 112 | // ignore canBeNil parameter, and always set to true. |
| 113 | // This is because nil can appear anywhere, so we should always check. |
| 114 | genAnythingCanBeNil = true |
| 115 | |
| 116 | // if genUseOneFunctionForDecStructMap, make a single codecDecodeSelferFromMap function; |
| 117 | // else make codecDecodeSelferFromMap{LenPrefix,CheckBreak} so that conditionals |
| 118 | // are not executed a lot. |
| 119 | // |
| 120 | // From testing, it didn't make much difference in runtime, so keep as true (one function only) |
| 121 | genUseOneFunctionForDecStructMap = true |
| 122 | ) |
| 123 | |
| 124 | type genStructMapStyle uint8 |
| 125 | |
| 126 | const ( |
| 127 | genStructMapStyleConsolidated genStructMapStyle = iota |
| 128 | genStructMapStyleLenPrefix |
| 129 | genStructMapStyleCheckBreak |
| 130 | ) |
| 131 | |
| 132 | var ( |
| 133 | errGenAllTypesSamePkg = errors.New("All types must be in the same package") |
| 134 | errGenExpectArrayOrMap = errors.New("unexpected type. Expecting array/map/slice") |
| 135 | |
| 136 | genBase64enc = base64.NewEncoding("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789__") |
| 137 | genQNameRegex = regexp.MustCompile(`[A-Za-z_.]+`) |
| 138 | ) |
| 139 | |
| 140 | type genBuf struct { |
| 141 | buf []byte |
| 142 | } |
| 143 | |
| 144 | func (x *genBuf) s(s string) *genBuf { x.buf = append(x.buf, s...); return x } |
| 145 | func (x *genBuf) b(s []byte) *genBuf { x.buf = append(x.buf, s...); return x } |
| 146 | func (x *genBuf) v() string { return string(x.buf) } |
| 147 | func (x *genBuf) f(s string, args ...interface{}) { x.s(fmt.Sprintf(s, args...)) } |
| 148 | func (x *genBuf) reset() { |
| 149 | if x.buf != nil { |
| 150 | x.buf = x.buf[:0] |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | // genRunner holds some state used during a Gen run. |
| 155 | type genRunner struct { |
| 156 | w io.Writer // output |
| 157 | c uint64 // counter used for generating varsfx |
| 158 | t []reflect.Type // list of types to run selfer on |
| 159 | |
| 160 | tc reflect.Type // currently running selfer on this type |
| 161 | te map[uintptr]bool // types for which the encoder has been created |
| 162 | td map[uintptr]bool // types for which the decoder has been created |
| 163 | cp string // codec import path |
| 164 | |
| 165 | im map[string]reflect.Type // imports to add |
| 166 | imn map[string]string // package names of imports to add |
| 167 | imc uint64 // counter for import numbers |
| 168 | |
| 169 | is map[reflect.Type]struct{} // types seen during import search |
| 170 | bp string // base PkgPath, for which we are generating for |
| 171 | |
| 172 | cpfx string // codec package prefix |
| 173 | |
| 174 | tm map[reflect.Type]struct{} // types for which enc/dec must be generated |
| 175 | ts []reflect.Type // types for which enc/dec must be generated |
| 176 | |
| 177 | xs string // top level variable/constant suffix |
| 178 | hn string // fn helper type name |
| 179 | |
| 180 | ti *TypeInfos |
| 181 | // rr *rand.Rand // random generator for file-specific types |
| 182 | |
| 183 | nx bool // no extensions |
| 184 | } |
| 185 | |
| 186 | // Gen will write a complete go file containing Selfer implementations for each |
| 187 | // type passed. All the types must be in the same package. |
| 188 | // |
| 189 | // Library users: DO NOT USE IT DIRECTLY. IT WILL CHANGE CONTINUOUSLY WITHOUT NOTICE. |
| 190 | func Gen(w io.Writer, buildTags, pkgName, uid string, noExtensions bool, |
| 191 | ti *TypeInfos, typ ...reflect.Type) { |
| 192 | // All types passed to this method do not have a codec.Selfer method implemented directly. |
| 193 | // codecgen already checks the AST and skips any types that define the codec.Selfer methods. |
| 194 | // Consequently, there's no need to check and trim them if they implement codec.Selfer |
| 195 | |
| 196 | if len(typ) == 0 { |
| 197 | return |
| 198 | } |
| 199 | x := genRunner{ |
| 200 | w: w, |
| 201 | t: typ, |
| 202 | te: make(map[uintptr]bool), |
| 203 | td: make(map[uintptr]bool), |
| 204 | im: make(map[string]reflect.Type), |
| 205 | imn: make(map[string]string), |
| 206 | is: make(map[reflect.Type]struct{}), |
| 207 | tm: make(map[reflect.Type]struct{}), |
| 208 | ts: []reflect.Type{}, |
| 209 | bp: genImportPath(typ[0]), |
| 210 | xs: uid, |
| 211 | ti: ti, |
| 212 | nx: noExtensions, |
| 213 | } |
| 214 | if x.ti == nil { |
| 215 | x.ti = defTypeInfos |
| 216 | } |
| 217 | if x.xs == "" { |
| 218 | rr := rand.New(rand.NewSource(time.Now().UnixNano())) |
| 219 | x.xs = strconv.FormatInt(rr.Int63n(9999), 10) |
| 220 | } |
| 221 | |
| 222 | // gather imports first: |
| 223 | x.cp = genImportPath(reflect.TypeOf(x)) |
| 224 | x.imn[x.cp] = genCodecPkg |
| 225 | for _, t := range typ { |
| 226 | // fmt.Printf("###########: PkgPath: '%v', Name: '%s'\n", genImportPath(t), t.Name()) |
| 227 | if genImportPath(t) != x.bp { |
| 228 | panic(errGenAllTypesSamePkg) |
| 229 | } |
| 230 | x.genRefPkgs(t) |
| 231 | } |
| 232 | if buildTags != "" { |
| 233 | x.line("// +build " + buildTags) |
| 234 | x.line("") |
| 235 | } |
| 236 | x.line(` |
| 237 | |
| 238 | // Code generated by codecgen - DO NOT EDIT. |
| 239 | |
| 240 | `) |
| 241 | x.line("package " + pkgName) |
| 242 | x.line("") |
| 243 | x.line("import (") |
| 244 | if x.cp != x.bp { |
| 245 | x.cpfx = genCodecPkg + "." |
| 246 | x.linef("%s \"%s\"", genCodecPkg, x.cp) |
| 247 | } |
| 248 | // use a sorted set of im keys, so that we can get consistent output |
| 249 | imKeys := make([]string, 0, len(x.im)) |
| 250 | for k := range x.im { |
| 251 | imKeys = append(imKeys, k) |
| 252 | } |
| 253 | sort.Strings(imKeys) |
| 254 | for _, k := range imKeys { // for k, _ := range x.im { |
| 255 | if k == x.imn[k] { |
| 256 | x.linef("\"%s\"", k) |
| 257 | } else { |
| 258 | x.linef("%s \"%s\"", x.imn[k], k) |
| 259 | } |
| 260 | } |
| 261 | // add required packages |
| 262 | for _, k := range [...]string{"runtime", "errors", "strconv"} { // "reflect", "fmt" |
| 263 | if _, ok := x.im[k]; !ok { |
| 264 | x.line("\"" + k + "\"") |
| 265 | } |
| 266 | } |
| 267 | x.line(")") |
| 268 | x.line("") |
| 269 | |
| 270 | x.line("const (") |
| 271 | x.linef("// ----- content types ----") |
| 272 | x.linef("codecSelferCcUTF8%s = %v", x.xs, int64(cUTF8)) |
| 273 | x.linef("codecSelferCcRAW%s = %v", x.xs, int64(cRAW)) |
| 274 | x.linef("// ----- value types used ----") |
| 275 | for _, vt := range [...]valueType{ |
| 276 | valueTypeArray, valueTypeMap, valueTypeString, |
| 277 | valueTypeInt, valueTypeUint, valueTypeFloat} { |
| 278 | x.linef("codecSelferValueType%s%s = %v", vt.String(), x.xs, int64(vt)) |
| 279 | } |
| 280 | |
| 281 | x.linef("codecSelferBitsize%s = uint8(32 << (^uint(0) >> 63))", x.xs) |
| 282 | x.line(")") |
| 283 | x.line("var (") |
| 284 | x.line("errCodecSelferOnlyMapOrArrayEncodeToStruct" + x.xs + " = errors.New(`only encoded map or array can be decoded into a struct`)") |
| 285 | x.line(")") |
| 286 | x.line("") |
| 287 | |
| 288 | x.hn = "codecSelfer" + x.xs |
| 289 | x.line("type " + x.hn + " struct{}") |
| 290 | x.line("") |
| 291 | |
| 292 | x.varsfxreset() |
| 293 | x.line("func init() {") |
| 294 | x.linef("if %sGenVersion != %v {", x.cpfx, genVersion) |
| 295 | x.line("_, file, _, _ := runtime.Caller(0)") |
| 296 | x.outf(`panic("codecgen version mismatch: current: %v, need " + strconv.FormatInt(int64(%sGenVersion), 10) + ". Re-generate file: " + file)`, genVersion, x.cpfx) |
| 297 | // x.out(`panic(fmt.Errorf("codecgen version mismatch: current: %v, need %v. Re-generate file: %v", `) |
| 298 | // x.linef(`%v, %sGenVersion, file))`, genVersion, x.cpfx) |
| 299 | x.linef("}") |
| 300 | x.line("if false { // reference the types, but skip this branch at build/run time") |
| 301 | // x.line("_ = strconv.ParseInt") |
| 302 | var n int |
| 303 | // for k, t := range x.im { |
| 304 | for _, k := range imKeys { |
| 305 | t := x.im[k] |
| 306 | x.linef("var v%v %s.%s", n, x.imn[k], t.Name()) |
| 307 | n++ |
| 308 | } |
| 309 | if n > 0 { |
| 310 | x.out("_") |
| 311 | for i := 1; i < n; i++ { |
| 312 | x.out(", _") |
| 313 | } |
| 314 | x.out(" = v0") |
| 315 | for i := 1; i < n; i++ { |
| 316 | x.outf(", v%v", i) |
| 317 | } |
| 318 | } |
| 319 | x.line("} ") // close if false |
| 320 | x.line("}") // close init |
| 321 | x.line("") |
| 322 | |
| 323 | // generate rest of type info |
| 324 | for _, t := range typ { |
| 325 | x.tc = t |
| 326 | x.selfer(true) |
| 327 | x.selfer(false) |
| 328 | } |
| 329 | |
| 330 | for _, t := range x.ts { |
| 331 | rtid := rt2id(t) |
| 332 | // generate enc functions for all these slice/map types. |
| 333 | x.varsfxreset() |
| 334 | x.linef("func (x %s) enc%s(v %s%s, e *%sEncoder) {", x.hn, x.genMethodNameT(t), x.arr2str(t, "*"), x.genTypeName(t), x.cpfx) |
| 335 | x.genRequiredMethodVars(true) |
| 336 | switch t.Kind() { |
| 337 | case reflect.Array, reflect.Slice, reflect.Chan: |
| 338 | x.encListFallback("v", t) |
| 339 | case reflect.Map: |
| 340 | x.encMapFallback("v", t) |
| 341 | default: |
| 342 | panic(errGenExpectArrayOrMap) |
| 343 | } |
| 344 | x.line("}") |
| 345 | x.line("") |
| 346 | |
| 347 | // generate dec functions for all these slice/map types. |
| 348 | x.varsfxreset() |
| 349 | x.linef("func (x %s) dec%s(v *%s, d *%sDecoder) {", x.hn, x.genMethodNameT(t), x.genTypeName(t), x.cpfx) |
| 350 | x.genRequiredMethodVars(false) |
| 351 | switch t.Kind() { |
| 352 | case reflect.Array, reflect.Slice, reflect.Chan: |
| 353 | x.decListFallback("v", rtid, t) |
| 354 | case reflect.Map: |
| 355 | x.decMapFallback("v", rtid, t) |
| 356 | default: |
| 357 | panic(errGenExpectArrayOrMap) |
| 358 | } |
| 359 | x.line("}") |
| 360 | x.line("") |
| 361 | } |
| 362 | |
| 363 | x.line("") |
| 364 | } |
| 365 | |
| 366 | func (x *genRunner) checkForSelfer(t reflect.Type, varname string) bool { |
| 367 | // return varname != genTopLevelVarName && t != x.tc |
| 368 | // the only time we checkForSelfer is if we are not at the TOP of the generated code. |
| 369 | return varname != genTopLevelVarName |
| 370 | } |
| 371 | |
| 372 | func (x *genRunner) arr2str(t reflect.Type, s string) string { |
| 373 | if t.Kind() == reflect.Array { |
| 374 | return s |
| 375 | } |
| 376 | return "" |
| 377 | } |
| 378 | |
| 379 | func (x *genRunner) genRequiredMethodVars(encode bool) { |
| 380 | x.line("var h " + x.hn) |
| 381 | if encode { |
| 382 | x.line("z, r := " + x.cpfx + "GenHelperEncoder(e)") |
| 383 | } else { |
| 384 | x.line("z, r := " + x.cpfx + "GenHelperDecoder(d)") |
| 385 | } |
| 386 | x.line("_, _, _ = h, z, r") |
| 387 | } |
| 388 | |
| 389 | func (x *genRunner) genRefPkgs(t reflect.Type) { |
| 390 | if _, ok := x.is[t]; ok { |
| 391 | return |
| 392 | } |
| 393 | x.is[t] = struct{}{} |
| 394 | tpkg, tname := genImportPath(t), t.Name() |
| 395 | if tpkg != "" && tpkg != x.bp && tpkg != x.cp && tname != "" && tname[0] >= 'A' && tname[0] <= 'Z' { |
| 396 | if _, ok := x.im[tpkg]; !ok { |
| 397 | x.im[tpkg] = t |
| 398 | if idx := strings.LastIndex(tpkg, "/"); idx < 0 { |
| 399 | x.imn[tpkg] = tpkg |
| 400 | } else { |
| 401 | x.imc++ |
| 402 | x.imn[tpkg] = "pkg" + strconv.FormatUint(x.imc, 10) + "_" + genGoIdentifier(tpkg[idx+1:], false) |
| 403 | } |
| 404 | } |
| 405 | } |
| 406 | switch t.Kind() { |
| 407 | case reflect.Array, reflect.Slice, reflect.Ptr, reflect.Chan: |
| 408 | x.genRefPkgs(t.Elem()) |
| 409 | case reflect.Map: |
| 410 | x.genRefPkgs(t.Elem()) |
| 411 | x.genRefPkgs(t.Key()) |
| 412 | case reflect.Struct: |
| 413 | for i := 0; i < t.NumField(); i++ { |
| 414 | if fname := t.Field(i).Name; fname != "" && fname[0] >= 'A' && fname[0] <= 'Z' { |
| 415 | x.genRefPkgs(t.Field(i).Type) |
| 416 | } |
| 417 | } |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | func (x *genRunner) varsfx() string { |
| 422 | x.c++ |
| 423 | return strconv.FormatUint(x.c, 10) |
| 424 | } |
| 425 | |
| 426 | func (x *genRunner) varsfxreset() { |
| 427 | x.c = 0 |
| 428 | } |
| 429 | |
| 430 | func (x *genRunner) out(s string) { |
| 431 | _, err := io.WriteString(x.w, s) |
| 432 | if err != nil { |
| 433 | panic(err) |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | func (x *genRunner) outf(s string, params ...interface{}) { |
| 438 | _, err := fmt.Fprintf(x.w, s, params...) |
| 439 | if err != nil { |
| 440 | panic(err) |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | func (x *genRunner) line(s string) { |
| 445 | x.out(s) |
| 446 | if len(s) == 0 || s[len(s)-1] != '\n' { |
| 447 | x.out("\n") |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | func (x *genRunner) linef(s string, params ...interface{}) { |
| 452 | x.outf(s, params...) |
| 453 | if len(s) == 0 || s[len(s)-1] != '\n' { |
| 454 | x.out("\n") |
| 455 | } |
| 456 | } |
| 457 | |
| 458 | func (x *genRunner) genTypeName(t reflect.Type) (n string) { |
| 459 | // defer func() { fmt.Printf(">>>> ####: genTypeName: t: %v, name: '%s'\n", t, n) }() |
| 460 | |
| 461 | // if the type has a PkgPath, which doesn't match the current package, |
| 462 | // then include it. |
| 463 | // We cannot depend on t.String() because it includes current package, |
| 464 | // or t.PkgPath because it includes full import path, |
| 465 | // |
| 466 | var ptrPfx string |
| 467 | for t.Kind() == reflect.Ptr { |
| 468 | ptrPfx += "*" |
| 469 | t = t.Elem() |
| 470 | } |
| 471 | if tn := t.Name(); tn != "" { |
| 472 | return ptrPfx + x.genTypeNamePrim(t) |
| 473 | } |
| 474 | switch t.Kind() { |
| 475 | case reflect.Map: |
| 476 | return ptrPfx + "map[" + x.genTypeName(t.Key()) + "]" + x.genTypeName(t.Elem()) |
| 477 | case reflect.Slice: |
| 478 | return ptrPfx + "[]" + x.genTypeName(t.Elem()) |
| 479 | case reflect.Array: |
| 480 | return ptrPfx + "[" + strconv.FormatInt(int64(t.Len()), 10) + "]" + x.genTypeName(t.Elem()) |
| 481 | case reflect.Chan: |
| 482 | return ptrPfx + t.ChanDir().String() + " " + x.genTypeName(t.Elem()) |
| 483 | default: |
| 484 | if t == intfTyp { |
| 485 | return ptrPfx + "interface{}" |
| 486 | } else { |
| 487 | return ptrPfx + x.genTypeNamePrim(t) |
| 488 | } |
| 489 | } |
| 490 | } |
| 491 | |
| 492 | func (x *genRunner) genTypeNamePrim(t reflect.Type) (n string) { |
| 493 | if t.Name() == "" { |
| 494 | return t.String() |
| 495 | } else if genImportPath(t) == "" || genImportPath(t) == genImportPath(x.tc) { |
| 496 | return t.Name() |
| 497 | } else { |
| 498 | return x.imn[genImportPath(t)] + "." + t.Name() |
| 499 | // return t.String() // best way to get the package name inclusive |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | func (x *genRunner) genZeroValueR(t reflect.Type) string { |
| 504 | // if t is a named type, w |
| 505 | switch t.Kind() { |
| 506 | case reflect.Ptr, reflect.Interface, reflect.Chan, reflect.Func, |
| 507 | reflect.Slice, reflect.Map, reflect.Invalid: |
| 508 | return "nil" |
| 509 | case reflect.Bool: |
| 510 | return "false" |
| 511 | case reflect.String: |
| 512 | return `""` |
| 513 | case reflect.Struct, reflect.Array: |
| 514 | return x.genTypeName(t) + "{}" |
| 515 | default: // all numbers |
| 516 | return "0" |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | func (x *genRunner) genMethodNameT(t reflect.Type) (s string) { |
| 521 | return genMethodNameT(t, x.tc) |
| 522 | } |
| 523 | |
| 524 | func (x *genRunner) selfer(encode bool) { |
| 525 | t := x.tc |
| 526 | t0 := t |
| 527 | // always make decode use a pointer receiver, |
| 528 | // and structs/arrays always use a ptr receiver (encode|decode) |
| 529 | isptr := !encode || t.Kind() == reflect.Array || (t.Kind() == reflect.Struct && t != timeTyp) |
| 530 | x.varsfxreset() |
| 531 | |
| 532 | fnSigPfx := "func (" + genTopLevelVarName + " " |
| 533 | if isptr { |
| 534 | fnSigPfx += "*" |
| 535 | } |
| 536 | fnSigPfx += x.genTypeName(t) |
| 537 | x.out(fnSigPfx) |
| 538 | |
| 539 | if isptr { |
| 540 | t = reflect.PtrTo(t) |
| 541 | } |
| 542 | if encode { |
| 543 | x.line(") CodecEncodeSelf(e *" + x.cpfx + "Encoder) {") |
| 544 | x.genRequiredMethodVars(true) |
| 545 | x.encVar(genTopLevelVarName, t) |
| 546 | } else { |
| 547 | x.line(") CodecDecodeSelf(d *" + x.cpfx + "Decoder) {") |
| 548 | x.genRequiredMethodVars(false) |
| 549 | // do not use decVar, as there is no need to check TryDecodeAsNil |
| 550 | // or way to elegantly handle that, and also setting it to a |
| 551 | // non-nil value doesn't affect the pointer passed. |
| 552 | // x.decVar(genTopLevelVarName, t, false) |
| 553 | x.dec(genTopLevelVarName, t0, true) |
| 554 | } |
| 555 | x.line("}") |
| 556 | x.line("") |
| 557 | |
| 558 | if encode || t0.Kind() != reflect.Struct { |
| 559 | return |
| 560 | } |
| 561 | |
| 562 | // write is containerMap |
| 563 | if genUseOneFunctionForDecStructMap { |
| 564 | x.out(fnSigPfx) |
| 565 | x.line(") codecDecodeSelfFromMap(l int, d *" + x.cpfx + "Decoder) {") |
| 566 | x.genRequiredMethodVars(false) |
| 567 | x.decStructMap(genTopLevelVarName, "l", rt2id(t0), t0, genStructMapStyleConsolidated) |
| 568 | x.line("}") |
| 569 | x.line("") |
| 570 | } else { |
| 571 | x.out(fnSigPfx) |
| 572 | x.line(") codecDecodeSelfFromMapLenPrefix(l int, d *" + x.cpfx + "Decoder) {") |
| 573 | x.genRequiredMethodVars(false) |
| 574 | x.decStructMap(genTopLevelVarName, "l", rt2id(t0), t0, genStructMapStyleLenPrefix) |
| 575 | x.line("}") |
| 576 | x.line("") |
| 577 | |
| 578 | x.out(fnSigPfx) |
| 579 | x.line(") codecDecodeSelfFromMapCheckBreak(l int, d *" + x.cpfx + "Decoder) {") |
| 580 | x.genRequiredMethodVars(false) |
| 581 | x.decStructMap(genTopLevelVarName, "l", rt2id(t0), t0, genStructMapStyleCheckBreak) |
| 582 | x.line("}") |
| 583 | x.line("") |
| 584 | } |
| 585 | |
| 586 | // write containerArray |
| 587 | x.out(fnSigPfx) |
| 588 | x.line(") codecDecodeSelfFromArray(l int, d *" + x.cpfx + "Decoder) {") |
| 589 | x.genRequiredMethodVars(false) |
| 590 | x.decStructArray(genTopLevelVarName, "l", "return", rt2id(t0), t0) |
| 591 | x.line("}") |
| 592 | x.line("") |
| 593 | |
| 594 | } |
| 595 | |
| 596 | // used for chan, array, slice, map |
| 597 | func (x *genRunner) xtraSM(varname string, t reflect.Type, encode, isptr bool) { |
| 598 | var ptrPfx, addrPfx string |
| 599 | if isptr { |
| 600 | ptrPfx = "*" |
| 601 | } else { |
| 602 | addrPfx = "&" |
| 603 | } |
| 604 | if encode { |
| 605 | x.linef("h.enc%s((%s%s)(%s), e)", x.genMethodNameT(t), ptrPfx, x.genTypeName(t), varname) |
| 606 | } else { |
| 607 | x.linef("h.dec%s((*%s)(%s%s), d)", x.genMethodNameT(t), x.genTypeName(t), addrPfx, varname) |
| 608 | } |
| 609 | x.registerXtraT(t) |
| 610 | } |
| 611 | |
| 612 | func (x *genRunner) registerXtraT(t reflect.Type) { |
| 613 | // recursively register the types |
| 614 | if _, ok := x.tm[t]; ok { |
| 615 | return |
| 616 | } |
| 617 | var tkey reflect.Type |
| 618 | switch t.Kind() { |
| 619 | case reflect.Chan, reflect.Slice, reflect.Array: |
| 620 | case reflect.Map: |
| 621 | tkey = t.Key() |
| 622 | default: |
| 623 | return |
| 624 | } |
| 625 | x.tm[t] = struct{}{} |
| 626 | x.ts = append(x.ts, t) |
| 627 | // check if this refers to any xtra types eg. a slice of array: add the array |
| 628 | x.registerXtraT(t.Elem()) |
| 629 | if tkey != nil { |
| 630 | x.registerXtraT(tkey) |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | // encVar will encode a variable. |
| 635 | // The parameter, t, is the reflect.Type of the variable itself |
| 636 | func (x *genRunner) encVar(varname string, t reflect.Type) { |
| 637 | // fmt.Printf(">>>>>> varname: %s, t: %v\n", varname, t) |
| 638 | var checkNil bool |
| 639 | switch t.Kind() { |
| 640 | case reflect.Ptr, reflect.Interface, reflect.Slice, reflect.Map, reflect.Chan: |
| 641 | checkNil = true |
| 642 | } |
| 643 | if checkNil { |
| 644 | x.linef("if %s == nil { r.EncodeNil() } else { ", varname) |
| 645 | } |
| 646 | |
| 647 | switch t.Kind() { |
| 648 | case reflect.Ptr: |
| 649 | telem := t.Elem() |
| 650 | tek := telem.Kind() |
| 651 | if tek == reflect.Array || (tek == reflect.Struct && telem != timeTyp) { |
| 652 | x.enc(varname, genNonPtr(t)) |
| 653 | break |
| 654 | } |
| 655 | i := x.varsfx() |
| 656 | x.line(genTempVarPfx + i + " := *" + varname) |
| 657 | x.enc(genTempVarPfx+i, genNonPtr(t)) |
| 658 | case reflect.Struct, reflect.Array: |
| 659 | if t == timeTyp { |
| 660 | x.enc(varname, t) |
| 661 | break |
| 662 | } |
| 663 | i := x.varsfx() |
| 664 | x.line(genTempVarPfx + i + " := &" + varname) |
| 665 | x.enc(genTempVarPfx+i, t) |
| 666 | default: |
| 667 | x.enc(varname, t) |
| 668 | } |
| 669 | |
| 670 | if checkNil { |
| 671 | x.line("}") |
| 672 | } |
| 673 | |
| 674 | } |
| 675 | |
| 676 | // enc will encode a variable (varname) of type t, where t represents T. |
| 677 | // if t is !time.Time and t is of kind reflect.Struct or reflect.Array, varname is of type *T |
| 678 | // (to prevent copying), |
| 679 | // else t is of type T |
| 680 | func (x *genRunner) enc(varname string, t reflect.Type) { |
| 681 | rtid := rt2id(t) |
| 682 | ti2 := x.ti.get(rtid, t) |
| 683 | // We call CodecEncodeSelf if one of the following are honored: |
| 684 | // - the type already implements Selfer, call that |
| 685 | // - the type has a Selfer implementation just created, use that |
| 686 | // - the type is in the list of the ones we will generate for, but it is not currently being generated |
| 687 | |
| 688 | mi := x.varsfx() |
| 689 | // tptr := reflect.PtrTo(t) |
| 690 | tk := t.Kind() |
| 691 | if x.checkForSelfer(t, varname) { |
| 692 | if tk == reflect.Array || (tk == reflect.Struct && rtid != timeTypId) { // varname is of type *T |
| 693 | // if tptr.Implements(selferTyp) || t.Implements(selferTyp) { |
| 694 | if ti2.isFlag(typeInfoFlagIsZeroerPtr) || ti2.isFlag(typeInfoFlagIsZeroer) { |
| 695 | x.line(varname + ".CodecEncodeSelf(e)") |
| 696 | return |
| 697 | } |
| 698 | } else { // varname is of type T |
| 699 | if ti2.cs { // t.Implements(selferTyp) { |
| 700 | x.line(varname + ".CodecEncodeSelf(e)") |
| 701 | return |
| 702 | } else if ti2.csp { // tptr.Implements(selferTyp) { |
| 703 | x.linef("%ssf%s := &%s", genTempVarPfx, mi, varname) |
| 704 | x.linef("%ssf%s.CodecEncodeSelf(e)", genTempVarPfx, mi) |
| 705 | return |
| 706 | } |
| 707 | } |
| 708 | |
| 709 | if _, ok := x.te[rtid]; ok { |
| 710 | x.line(varname + ".CodecEncodeSelf(e)") |
| 711 | return |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | inlist := false |
| 716 | for _, t0 := range x.t { |
| 717 | if t == t0 { |
| 718 | inlist = true |
| 719 | if x.checkForSelfer(t, varname) { |
| 720 | x.line(varname + ".CodecEncodeSelf(e)") |
| 721 | return |
| 722 | } |
| 723 | break |
| 724 | } |
| 725 | } |
| 726 | |
| 727 | var rtidAdded bool |
| 728 | if t == x.tc { |
| 729 | x.te[rtid] = true |
| 730 | rtidAdded = true |
| 731 | } |
| 732 | |
| 733 | // check if |
| 734 | // - type is time.Time, RawExt, Raw |
| 735 | // - the type implements (Text|JSON|Binary)(Unm|M)arshal |
| 736 | |
| 737 | x.line("if false {") //start if block |
| 738 | defer func() { x.line("}") }() //end if block |
| 739 | |
| 740 | if t == timeTyp { |
| 741 | x.linef("} else { r.EncodeTime(%s)", varname) |
| 742 | return |
| 743 | } |
| 744 | if t == rawTyp { |
| 745 | x.linef("} else { z.EncRaw(%s)", varname) |
| 746 | return |
| 747 | } |
| 748 | if t == rawExtTyp { |
| 749 | x.linef("} else { r.EncodeRawExt(%s, e)", varname) |
| 750 | return |
| 751 | } |
| 752 | // only check for extensions if the type is named, and has a packagePath. |
| 753 | var arrayOrStruct = tk == reflect.Array || tk == reflect.Struct // meaning varname if of type *T |
| 754 | if !x.nx && genImportPath(t) != "" && t.Name() != "" { |
| 755 | yy := fmt.Sprintf("%sxt%s", genTempVarPfx, mi) |
| 756 | x.linef("} else if %s := z.Extension(z.I2Rtid(%s)); %s != nil { z.EncExtension(%s, %s) ", yy, varname, yy, varname, yy) |
| 757 | } |
| 758 | if arrayOrStruct { // varname is of type *T |
| 759 | if ti2.bm || ti2.bmp { // t.Implements(binaryMarshalerTyp) || tptr.Implements(binaryMarshalerTyp) { |
| 760 | x.linef("} else if z.EncBinary() { z.EncBinaryMarshal(%v) ", varname) |
| 761 | } |
| 762 | if ti2.jm || ti2.jmp { // t.Implements(jsonMarshalerTyp) || tptr.Implements(jsonMarshalerTyp) { |
| 763 | x.linef("} else if !z.EncBinary() && z.IsJSONHandle() { z.EncJSONMarshal(%v) ", varname) |
| 764 | } else if ti2.tm || ti2.tmp { // t.Implements(textMarshalerTyp) || tptr.Implements(textMarshalerTyp) { |
| 765 | x.linef("} else if !z.EncBinary() { z.EncTextMarshal(%v) ", varname) |
| 766 | } |
| 767 | } else { // varname is of type T |
| 768 | if ti2.bm { // t.Implements(binaryMarshalerTyp) { |
| 769 | x.linef("} else if z.EncBinary() { z.EncBinaryMarshal(%v) ", varname) |
| 770 | } else if ti2.bmp { // tptr.Implements(binaryMarshalerTyp) { |
| 771 | x.linef("} else if z.EncBinary() { z.EncBinaryMarshal(&%v) ", varname) |
| 772 | } |
| 773 | if ti2.jm { // t.Implements(jsonMarshalerTyp) { |
| 774 | x.linef("} else if !z.EncBinary() && z.IsJSONHandle() { z.EncJSONMarshal(%v) ", varname) |
| 775 | } else if ti2.jmp { // tptr.Implements(jsonMarshalerTyp) { |
| 776 | x.linef("} else if !z.EncBinary() && z.IsJSONHandle() { z.EncJSONMarshal(&%v) ", varname) |
| 777 | } else if ti2.tm { // t.Implements(textMarshalerTyp) { |
| 778 | x.linef("} else if !z.EncBinary() { z.EncTextMarshal(%v) ", varname) |
| 779 | } else if ti2.tmp { // tptr.Implements(textMarshalerTyp) { |
| 780 | x.linef("} else if !z.EncBinary() { z.EncTextMarshal(&%v) ", varname) |
| 781 | } |
| 782 | } |
| 783 | x.line("} else {") |
| 784 | |
| 785 | switch t.Kind() { |
| 786 | case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: |
| 787 | x.line("r.EncodeInt(int64(" + varname + "))") |
| 788 | case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: |
| 789 | x.line("r.EncodeUint(uint64(" + varname + "))") |
| 790 | case reflect.Float32: |
| 791 | x.line("r.EncodeFloat32(float32(" + varname + "))") |
| 792 | case reflect.Float64: |
| 793 | x.line("r.EncodeFloat64(float64(" + varname + "))") |
| 794 | case reflect.Bool: |
| 795 | x.line("r.EncodeBool(bool(" + varname + "))") |
| 796 | case reflect.String: |
| 797 | x.line("r.EncodeString(codecSelferCcUTF8" + x.xs + ", string(" + varname + "))") |
| 798 | case reflect.Chan: |
| 799 | x.xtraSM(varname, t, true, false) |
| 800 | // x.encListFallback(varname, rtid, t) |
| 801 | case reflect.Array: |
| 802 | x.xtraSM(varname, t, true, true) |
| 803 | case reflect.Slice: |
| 804 | // if nil, call dedicated function |
| 805 | // if a []uint8, call dedicated function |
| 806 | // if a known fastpath slice, call dedicated function |
| 807 | // else write encode function in-line. |
| 808 | // - if elements are primitives or Selfers, call dedicated function on each member. |
| 809 | // - else call Encoder.encode(XXX) on it. |
| 810 | if rtid == uint8SliceTypId { |
| 811 | x.line("r.EncodeStringBytes(codecSelferCcRAW" + x.xs + ", []byte(" + varname + "))") |
| 812 | } else if fastpathAV.index(rtid) != -1 { |
| 813 | g := x.newGenV(t) |
| 814 | x.line("z.F." + g.MethodNamePfx("Enc", false) + "V(" + varname + ", e)") |
| 815 | } else { |
| 816 | x.xtraSM(varname, t, true, false) |
| 817 | // x.encListFallback(varname, rtid, t) |
| 818 | } |
| 819 | case reflect.Map: |
| 820 | // if nil, call dedicated function |
| 821 | // if a known fastpath map, call dedicated function |
| 822 | // else write encode function in-line. |
| 823 | // - if elements are primitives or Selfers, call dedicated function on each member. |
| 824 | // - else call Encoder.encode(XXX) on it. |
| 825 | // x.line("if " + varname + " == nil { \nr.EncodeNil()\n } else { ") |
| 826 | if fastpathAV.index(rtid) != -1 { |
| 827 | g := x.newGenV(t) |
| 828 | x.line("z.F." + g.MethodNamePfx("Enc", false) + "V(" + varname + ", e)") |
| 829 | } else { |
| 830 | x.xtraSM(varname, t, true, false) |
| 831 | // x.encMapFallback(varname, rtid, t) |
| 832 | } |
| 833 | case reflect.Struct: |
| 834 | if !inlist { |
| 835 | delete(x.te, rtid) |
| 836 | x.line("z.EncFallback(" + varname + ")") |
| 837 | break |
| 838 | } |
| 839 | x.encStruct(varname, rtid, t) |
| 840 | default: |
| 841 | if rtidAdded { |
| 842 | delete(x.te, rtid) |
| 843 | } |
| 844 | x.line("z.EncFallback(" + varname + ")") |
| 845 | } |
| 846 | } |
| 847 | |
| 848 | func (x *genRunner) encZero(t reflect.Type) { |
| 849 | switch t.Kind() { |
| 850 | case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: |
| 851 | x.line("r.EncodeInt(0)") |
| 852 | case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: |
| 853 | x.line("r.EncodeUint(0)") |
| 854 | case reflect.Float32: |
| 855 | x.line("r.EncodeFloat32(0)") |
| 856 | case reflect.Float64: |
| 857 | x.line("r.EncodeFloat64(0)") |
| 858 | case reflect.Bool: |
| 859 | x.line("r.EncodeBool(false)") |
| 860 | case reflect.String: |
| 861 | x.line("r.EncodeString(codecSelferCcUTF8" + x.xs + `, "")`) |
| 862 | default: |
| 863 | x.line("r.EncodeNil()") |
| 864 | } |
| 865 | } |
| 866 | |
| 867 | func (x *genRunner) encOmitEmptyLine(t2 reflect.StructField, varname string, buf *genBuf) { |
| 868 | // smartly check omitEmpty on a struct type, as it may contain uncomparable map/slice/etc. |
| 869 | // also, for maps/slices/arrays, check if len ! 0 (not if == zero value) |
| 870 | varname2 := varname + "." + t2.Name |
| 871 | switch t2.Type.Kind() { |
| 872 | case reflect.Struct: |
| 873 | rtid2 := rt2id(t2.Type) |
| 874 | ti2 := x.ti.get(rtid2, t2.Type) |
| 875 | // fmt.Printf(">>>> structfield: omitempty: type: %s, field: %s\n", t2.Type.Name(), t2.Name) |
| 876 | if ti2.rtid == timeTypId { |
| 877 | buf.s("!(").s(varname2).s(".IsZero())") |
| 878 | break |
| 879 | } |
| 880 | if ti2.isFlag(typeInfoFlagIsZeroerPtr) || ti2.isFlag(typeInfoFlagIsZeroer) { |
| 881 | buf.s("!(").s(varname2).s(".IsZero())") |
| 882 | break |
| 883 | } |
| 884 | if ti2.isFlag(typeInfoFlagComparable) { |
| 885 | buf.s(varname2).s(" != ").s(x.genZeroValueR(t2.Type)) |
| 886 | break |
| 887 | } |
| 888 | // buf.s("(") |
| 889 | buf.s("false") |
| 890 | for i, n := 0, t2.Type.NumField(); i < n; i++ { |
| 891 | f := t2.Type.Field(i) |
| 892 | if f.PkgPath != "" { // unexported |
| 893 | continue |
| 894 | } |
| 895 | buf.s(" || ") |
| 896 | x.encOmitEmptyLine(f, varname2, buf) |
| 897 | } |
| 898 | //buf.s(")") |
| 899 | case reflect.Bool: |
| 900 | buf.s(varname2) |
| 901 | case reflect.Map, reflect.Slice, reflect.Array, reflect.Chan: |
| 902 | buf.s("len(").s(varname2).s(") != 0") |
| 903 | default: |
| 904 | buf.s(varname2).s(" != ").s(x.genZeroValueR(t2.Type)) |
| 905 | } |
| 906 | } |
| 907 | |
| 908 | func (x *genRunner) encStruct(varname string, rtid uintptr, t reflect.Type) { |
| 909 | // Use knowledge from structfieldinfo (mbs, encodable fields. Ignore omitempty. ) |
| 910 | // replicate code in kStruct i.e. for each field, deref type to non-pointer, and call x.enc on it |
| 911 | |
| 912 | // if t === type currently running selfer on, do for all |
| 913 | ti := x.ti.get(rtid, t) |
| 914 | i := x.varsfx() |
| 915 | sepVarname := genTempVarPfx + "sep" + i |
| 916 | numfieldsvar := genTempVarPfx + "q" + i |
| 917 | ti2arrayvar := genTempVarPfx + "r" + i |
| 918 | struct2arrvar := genTempVarPfx + "2arr" + i |
| 919 | |
| 920 | x.line(sepVarname + " := !z.EncBinary()") |
| 921 | x.linef("%s := z.EncBasicHandle().StructToArray", struct2arrvar) |
| 922 | x.linef("_, _ = %s, %s", sepVarname, struct2arrvar) |
| 923 | x.linef("const %s bool = %v // struct tag has 'toArray'", ti2arrayvar, ti.toArray) |
| 924 | |
| 925 | tisfi := ti.sfiSrc // always use sequence from file. decStruct expects same thing. |
| 926 | |
| 927 | // var nn int |
| 928 | // due to omitEmpty, we need to calculate the |
| 929 | // number of non-empty things we write out first. |
| 930 | // This is required as we need to pre-determine the size of the container, |
| 931 | // to support length-prefixing. |
| 932 | if ti.anyOmitEmpty { |
| 933 | x.linef("var %s = [%v]bool{ // should field at this index be written?", numfieldsvar, len(tisfi)) |
| 934 | |
| 935 | for j, si := range tisfi { |
| 936 | _ = j |
| 937 | if !si.omitEmpty() { |
| 938 | // x.linef("%s[%v] = true // %s", numfieldsvar, j, si.fieldName) |
| 939 | x.linef("true, // %s", si.fieldName) |
| 940 | // nn++ |
| 941 | continue |
| 942 | } |
| 943 | var t2 reflect.StructField |
| 944 | var omitline genBuf |
| 945 | { |
| 946 | t2typ := t |
| 947 | varname3 := varname |
| 948 | // go through the loop, record the t2 field explicitly, |
| 949 | // and gather the omit line if embedded in pointers. |
| 950 | for ij, ix := range si.is { |
| 951 | if uint8(ij) == si.nis { |
| 952 | break |
| 953 | } |
| 954 | for t2typ.Kind() == reflect.Ptr { |
| 955 | t2typ = t2typ.Elem() |
| 956 | } |
| 957 | t2 = t2typ.Field(int(ix)) |
| 958 | t2typ = t2.Type |
| 959 | varname3 = varname3 + "." + t2.Name |
| 960 | // do not include actual field in the omit line. |
| 961 | // that is done subsequently (right after - below). |
| 962 | if uint8(ij+1) < si.nis && t2typ.Kind() == reflect.Ptr { |
| 963 | omitline.s(varname3).s(" != nil && ") |
| 964 | } |
| 965 | } |
| 966 | } |
| 967 | x.encOmitEmptyLine(t2, varname, &omitline) |
| 968 | x.linef("%s, // %s", omitline.v(), si.fieldName) |
| 969 | } |
| 970 | x.line("}") |
| 971 | x.linef("_ = %s", numfieldsvar) |
| 972 | } |
| 973 | // x.linef("var %snn%s int", genTempVarPfx, i) |
| 974 | x.linef("if %s || %s {", ti2arrayvar, struct2arrvar) // if ti.toArray { |
| 975 | x.linef("r.WriteArrayStart(%d)", len(tisfi)) |
| 976 | x.linef("} else {") // if not ti.toArray |
| 977 | if ti.anyOmitEmpty { |
| 978 | // nn = 0 |
| 979 | // x.linef("var %snn%s = %v", genTempVarPfx, i, nn) |
| 980 | x.linef("var %snn%s int", genTempVarPfx, i) |
| 981 | x.linef("for _, b := range %s { if b { %snn%s++ } }", numfieldsvar, genTempVarPfx, i) |
| 982 | x.linef("r.WriteMapStart(%snn%s)", genTempVarPfx, i) |
| 983 | x.linef("%snn%s = %v", genTempVarPfx, i, 0) |
| 984 | } else { |
| 985 | x.linef("r.WriteMapStart(%d)", len(tisfi)) |
| 986 | } |
| 987 | x.line("}") // close if not StructToArray |
| 988 | |
| 989 | for j, si := range tisfi { |
| 990 | i := x.varsfx() |
| 991 | isNilVarName := genTempVarPfx + "n" + i |
| 992 | var labelUsed bool |
| 993 | var t2 reflect.StructField |
| 994 | { |
| 995 | t2typ := t |
| 996 | varname3 := varname |
| 997 | for ij, ix := range si.is { |
| 998 | if uint8(ij) == si.nis { |
| 999 | break |
| 1000 | } |
| 1001 | for t2typ.Kind() == reflect.Ptr { |
| 1002 | t2typ = t2typ.Elem() |
| 1003 | } |
| 1004 | t2 = t2typ.Field(int(ix)) |
| 1005 | t2typ = t2.Type |
| 1006 | varname3 = varname3 + "." + t2.Name |
| 1007 | if t2typ.Kind() == reflect.Ptr { |
| 1008 | if !labelUsed { |
| 1009 | x.line("var " + isNilVarName + " bool") |
| 1010 | } |
| 1011 | x.line("if " + varname3 + " == nil { " + isNilVarName + " = true ") |
| 1012 | x.line("goto LABEL" + i) |
| 1013 | x.line("}") |
| 1014 | labelUsed = true |
| 1015 | // "varname3 = new(" + x.genTypeName(t3.Elem()) + ") }") |
| 1016 | } |
| 1017 | } |
| 1018 | // t2 = t.FieldByIndex(si.is) |
| 1019 | } |
| 1020 | if labelUsed { |
| 1021 | x.line("LABEL" + i + ":") |
| 1022 | } |
| 1023 | // if the type of the field is a Selfer, or one of the ones |
| 1024 | |
| 1025 | x.linef("if %s || %s {", ti2arrayvar, struct2arrvar) // if ti.toArray |
| 1026 | if labelUsed { |
| 1027 | x.linef("if %s { r.WriteArrayElem(); r.EncodeNil() } else { ", isNilVarName) |
| 1028 | } |
| 1029 | x.line("r.WriteArrayElem()") |
| 1030 | if si.omitEmpty() { |
| 1031 | x.linef("if %s[%v] {", numfieldsvar, j) |
| 1032 | } |
| 1033 | x.encVar(varname+"."+t2.Name, t2.Type) |
| 1034 | if si.omitEmpty() { |
| 1035 | x.linef("} else {") |
| 1036 | x.encZero(t2.Type) |
| 1037 | x.linef("}") |
| 1038 | } |
| 1039 | if labelUsed { |
| 1040 | x.line("}") |
| 1041 | } |
| 1042 | |
| 1043 | x.linef("} else {") // if not ti.toArray |
| 1044 | |
| 1045 | if si.omitEmpty() { |
| 1046 | x.linef("if %s[%v] {", numfieldsvar, j) |
| 1047 | } |
| 1048 | x.line("r.WriteMapElemKey()") |
| 1049 | |
| 1050 | // x.line("r.EncodeString(codecSelferCcUTF8" + x.xs + ", `" + si.encName + "`)") |
| 1051 | // emulate EncStructFieldKey |
| 1052 | switch ti.keyType { |
| 1053 | case valueTypeInt: |
| 1054 | x.linef("r.EncodeInt(z.M.Int(strconv.ParseInt(`%s`, 10, 64)))", si.encName) |
| 1055 | case valueTypeUint: |
| 1056 | x.linef("r.EncodeUint(z.M.Uint(strconv.ParseUint(`%s`, 10, 64)))", si.encName) |
| 1057 | case valueTypeFloat: |
| 1058 | x.linef("r.EncodeFloat64(z.M.Float(strconv.ParseFloat(`%s`, 64)))", si.encName) |
| 1059 | default: // string |
| 1060 | x.linef("r.EncodeString(codecSelferCcUTF8%s, `%s`)", x.xs, si.encName) |
| 1061 | } |
| 1062 | // x.linef("r.EncStructFieldKey(codecSelferValueType%s%s, `%s`)", ti.keyType.String(), x.xs, si.encName) |
| 1063 | x.line("r.WriteMapElemValue()") |
| 1064 | if labelUsed { |
| 1065 | x.line("if " + isNilVarName + " { r.EncodeNil() } else { ") |
| 1066 | x.encVar(varname+"."+t2.Name, t2.Type) |
| 1067 | x.line("}") |
| 1068 | } else { |
| 1069 | x.encVar(varname+"."+t2.Name, t2.Type) |
| 1070 | } |
| 1071 | if si.omitEmpty() { |
| 1072 | x.line("}") |
| 1073 | } |
| 1074 | x.linef("} ") // end if/else ti.toArray |
| 1075 | } |
| 1076 | x.linef("if %s || %s {", ti2arrayvar, struct2arrvar) // if ti.toArray { |
| 1077 | x.line("r.WriteArrayEnd()") |
| 1078 | x.line("} else {") |
| 1079 | x.line("r.WriteMapEnd()") |
| 1080 | x.line("}") |
| 1081 | |
| 1082 | } |
| 1083 | |
| 1084 | func (x *genRunner) encListFallback(varname string, t reflect.Type) { |
| 1085 | elemBytes := t.Elem().Kind() == reflect.Uint8 |
| 1086 | if t.AssignableTo(uint8SliceTyp) { |
| 1087 | x.linef("r.EncodeStringBytes(codecSelferCcRAW%s, []byte(%s))", x.xs, varname) |
| 1088 | return |
| 1089 | } |
| 1090 | if t.Kind() == reflect.Array && elemBytes { |
| 1091 | x.linef("r.EncodeStringBytes(codecSelferCcRAW%s, ((*[%d]byte)(%s))[:])", x.xs, t.Len(), varname) |
| 1092 | return |
| 1093 | } |
| 1094 | i := x.varsfx() |
| 1095 | if t.Kind() == reflect.Chan { |
| 1096 | type ts struct { |
| 1097 | Label, Chan, Slice, Sfx string |
| 1098 | } |
| 1099 | tm, err := template.New("").Parse(genEncChanTmpl) |
| 1100 | if err != nil { |
| 1101 | panic(err) |
| 1102 | } |
| 1103 | x.linef("if %s == nil { r.EncodeNil() } else { ", varname) |
| 1104 | x.linef("var sch%s []%s", i, x.genTypeName(t.Elem())) |
| 1105 | err = tm.Execute(x.w, &ts{"Lsch" + i, varname, "sch" + i, i}) |
| 1106 | if err != nil { |
| 1107 | panic(err) |
| 1108 | } |
| 1109 | // x.linef("%s = sch%s", varname, i) |
| 1110 | if elemBytes { |
| 1111 | x.linef("r.EncodeStringBytes(codecSelferCcRAW%s, []byte(%s))", x.xs, "sch"+i) |
| 1112 | x.line("}") |
| 1113 | return |
| 1114 | } |
| 1115 | varname = "sch" + i |
| 1116 | } |
| 1117 | |
| 1118 | x.line("r.WriteArrayStart(len(" + varname + "))") |
| 1119 | x.linef("for _, %sv%s := range %s {", genTempVarPfx, i, varname) |
| 1120 | x.line("r.WriteArrayElem()") |
| 1121 | |
| 1122 | x.encVar(genTempVarPfx+"v"+i, t.Elem()) |
| 1123 | x.line("}") |
| 1124 | x.line("r.WriteArrayEnd()") |
| 1125 | if t.Kind() == reflect.Chan { |
| 1126 | x.line("}") |
| 1127 | } |
| 1128 | } |
| 1129 | |
| 1130 | func (x *genRunner) encMapFallback(varname string, t reflect.Type) { |
| 1131 | // TODO: expand this to handle canonical. |
| 1132 | i := x.varsfx() |
| 1133 | x.line("r.WriteMapStart(len(" + varname + "))") |
| 1134 | x.linef("for %sk%s, %sv%s := range %s {", genTempVarPfx, i, genTempVarPfx, i, varname) |
| 1135 | x.line("r.WriteMapElemKey()") |
| 1136 | x.encVar(genTempVarPfx+"k"+i, t.Key()) |
| 1137 | x.line("r.WriteMapElemValue()") |
| 1138 | x.encVar(genTempVarPfx+"v"+i, t.Elem()) |
| 1139 | x.line("}") |
| 1140 | x.line("r.WriteMapEnd()") |
| 1141 | } |
| 1142 | |
| 1143 | func (x *genRunner) decVarInitPtr(varname, nilvar string, t reflect.Type, si *structFieldInfo, |
| 1144 | newbuf, nilbuf *genBuf) (t2 reflect.StructField) { |
| 1145 | //we must accommodate anonymous fields, where the embedded field is a nil pointer in the value. |
| 1146 | // t2 = t.FieldByIndex(si.is) |
| 1147 | t2typ := t |
| 1148 | varname3 := varname |
| 1149 | t2kind := t2typ.Kind() |
| 1150 | var nilbufed bool |
| 1151 | if si != nil { |
| 1152 | for ij, ix := range si.is { |
| 1153 | if uint8(ij) == si.nis { |
| 1154 | break |
| 1155 | } |
| 1156 | for t2typ.Kind() == reflect.Ptr { |
| 1157 | t2typ = t2typ.Elem() |
| 1158 | } |
| 1159 | t2 = t2typ.Field(int(ix)) |
| 1160 | t2typ = t2.Type |
| 1161 | varname3 = varname3 + "." + t2.Name |
| 1162 | t2kind = t2typ.Kind() |
| 1163 | if t2kind != reflect.Ptr { |
| 1164 | continue |
| 1165 | } |
| 1166 | if newbuf != nil { |
| 1167 | newbuf.f("if %s == nil { %s = new(%s) }\n", varname3, varname3, x.genTypeName(t2typ.Elem())) |
| 1168 | } |
| 1169 | if nilbuf != nil { |
| 1170 | if !nilbufed { |
| 1171 | nilbuf.s("if true") |
| 1172 | nilbufed = true |
| 1173 | } |
| 1174 | nilbuf.s(" && ").s(varname3).s(" != nil") |
| 1175 | } |
| 1176 | } |
| 1177 | } |
| 1178 | // if t2typ.Kind() == reflect.Ptr { |
| 1179 | // varname3 = varname3 + t2.Name |
| 1180 | // } |
| 1181 | if nilbuf != nil { |
| 1182 | if nilbufed { |
| 1183 | nilbuf.s(" { ") |
| 1184 | } |
| 1185 | if nilvar != "" { |
| 1186 | nilbuf.s(nilvar).s(" = true") |
| 1187 | } else if tk := t2typ.Kind(); tk == reflect.Ptr { |
| 1188 | if strings.IndexByte(varname3, '.') != -1 || strings.IndexByte(varname3, '[') != -1 { |
| 1189 | nilbuf.s(varname3).s(" = nil") |
| 1190 | } else { |
| 1191 | nilbuf.s("*").s(varname3).s(" = ").s(x.genZeroValueR(t2typ.Elem())) |
| 1192 | } |
| 1193 | } else { |
| 1194 | nilbuf.s(varname3).s(" = ").s(x.genZeroValueR(t2typ)) |
| 1195 | } |
| 1196 | if nilbufed { |
| 1197 | nilbuf.s("}") |
| 1198 | } |
| 1199 | } |
| 1200 | return t2 |
| 1201 | } |
| 1202 | |
| 1203 | // decVar takes a variable called varname, of type t |
| 1204 | func (x *genRunner) decVarMain(varname, rand string, t reflect.Type, checkNotNil bool) { |
| 1205 | // We only encode as nil if a nillable value. |
| 1206 | // This removes some of the wasted checks for TryDecodeAsNil. |
| 1207 | // We need to think about this more, to see what happens if omitempty, etc |
| 1208 | // cause a nil value to be stored when something is expected. |
| 1209 | // This could happen when decoding from a struct encoded as an array. |
| 1210 | // For that, decVar should be called with canNil=true, to force true as its value. |
| 1211 | var varname2 string |
| 1212 | if t.Kind() != reflect.Ptr { |
| 1213 | if t.PkgPath() != "" || !x.decTryAssignPrimitive(varname, t, false) { |
| 1214 | x.dec(varname, t, false) |
| 1215 | } |
| 1216 | } else { |
| 1217 | if checkNotNil { |
| 1218 | x.linef("if %s == nil { %s = new(%s) }", varname, varname, x.genTypeName(t.Elem())) |
| 1219 | } |
| 1220 | // Ensure we set underlying ptr to a non-nil value (so we can deref to it later). |
| 1221 | // There's a chance of a **T in here which is nil. |
| 1222 | var ptrPfx string |
| 1223 | for t = t.Elem(); t.Kind() == reflect.Ptr; t = t.Elem() { |
| 1224 | ptrPfx += "*" |
| 1225 | if checkNotNil { |
| 1226 | x.linef("if %s%s == nil { %s%s = new(%s)}", |
| 1227 | ptrPfx, varname, ptrPfx, varname, x.genTypeName(t)) |
| 1228 | } |
| 1229 | } |
| 1230 | // Should we create temp var if a slice/map indexing? No. dec(...) can now handle it. |
| 1231 | |
| 1232 | if ptrPfx == "" { |
| 1233 | x.dec(varname, t, true) |
| 1234 | } else { |
| 1235 | varname2 = genTempVarPfx + "z" + rand |
| 1236 | x.line(varname2 + " := " + ptrPfx + varname) |
| 1237 | x.dec(varname2, t, true) |
| 1238 | } |
| 1239 | } |
| 1240 | } |
| 1241 | |
| 1242 | // decVar takes a variable called varname, of type t |
| 1243 | func (x *genRunner) decVar(varname, nilvar string, t reflect.Type, canBeNil, checkNotNil bool) { |
| 1244 | i := x.varsfx() |
| 1245 | |
| 1246 | // We only encode as nil if a nillable value. |
| 1247 | // This removes some of the wasted checks for TryDecodeAsNil. |
| 1248 | // We need to think about this more, to see what happens if omitempty, etc |
| 1249 | // cause a nil value to be stored when something is expected. |
| 1250 | // This could happen when decoding from a struct encoded as an array. |
| 1251 | // For that, decVar should be called with canNil=true, to force true as its value. |
| 1252 | |
| 1253 | if !canBeNil { |
| 1254 | canBeNil = genAnythingCanBeNil || !genIsImmutable(t) |
| 1255 | } |
| 1256 | |
| 1257 | if canBeNil { |
| 1258 | var buf genBuf |
| 1259 | x.decVarInitPtr(varname, nilvar, t, nil, nil, &buf) |
| 1260 | x.linef("if r.TryDecodeAsNil() { %s } else {", buf.buf) |
| 1261 | } else { |
| 1262 | x.line("// cannot be nil") |
| 1263 | } |
| 1264 | |
| 1265 | x.decVarMain(varname, i, t, checkNotNil) |
| 1266 | |
| 1267 | if canBeNil { |
| 1268 | x.line("} ") |
| 1269 | } |
| 1270 | } |
| 1271 | |
| 1272 | // dec will decode a variable (varname) of type t or ptrTo(t) if isptr==true. |
| 1273 | // t is always a basetype (i.e. not of kind reflect.Ptr). |
| 1274 | func (x *genRunner) dec(varname string, t reflect.Type, isptr bool) { |
| 1275 | // assumptions: |
| 1276 | // - the varname is to a pointer already. No need to take address of it |
| 1277 | // - t is always a baseType T (not a *T, etc). |
| 1278 | rtid := rt2id(t) |
| 1279 | ti2 := x.ti.get(rtid, t) |
| 1280 | // tptr := reflect.PtrTo(t) |
| 1281 | if x.checkForSelfer(t, varname) { |
| 1282 | if ti2.cs || ti2.csp { // t.Implements(selferTyp) || tptr.Implements(selferTyp) { |
| 1283 | x.line(varname + ".CodecDecodeSelf(d)") |
| 1284 | return |
| 1285 | } |
| 1286 | if _, ok := x.td[rtid]; ok { |
| 1287 | x.line(varname + ".CodecDecodeSelf(d)") |
| 1288 | return |
| 1289 | } |
| 1290 | } |
| 1291 | |
| 1292 | inlist := false |
| 1293 | for _, t0 := range x.t { |
| 1294 | if t == t0 { |
| 1295 | inlist = true |
| 1296 | if x.checkForSelfer(t, varname) { |
| 1297 | x.line(varname + ".CodecDecodeSelf(d)") |
| 1298 | return |
| 1299 | } |
| 1300 | break |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | var rtidAdded bool |
| 1305 | if t == x.tc { |
| 1306 | x.td[rtid] = true |
| 1307 | rtidAdded = true |
| 1308 | } |
| 1309 | |
| 1310 | // check if |
| 1311 | // - type is time.Time, Raw, RawExt |
| 1312 | // - the type implements (Text|JSON|Binary)(Unm|M)arshal |
| 1313 | |
| 1314 | mi := x.varsfx() |
| 1315 | // x.linef("%sm%s := z.DecBinary()", genTempVarPfx, mi) |
| 1316 | // x.linef("_ = %sm%s", genTempVarPfx, mi) |
| 1317 | x.line("if false {") //start if block |
| 1318 | defer func() { x.line("}") }() //end if block |
| 1319 | |
| 1320 | var ptrPfx, addrPfx string |
| 1321 | if isptr { |
| 1322 | ptrPfx = "*" |
| 1323 | } else { |
| 1324 | addrPfx = "&" |
| 1325 | } |
| 1326 | if t == timeTyp { |
| 1327 | x.linef("} else { %s%v = r.DecodeTime()", ptrPfx, varname) |
| 1328 | return |
| 1329 | } |
| 1330 | if t == rawTyp { |
| 1331 | x.linef("} else { %s%v = z.DecRaw()", ptrPfx, varname) |
| 1332 | return |
| 1333 | } |
| 1334 | |
| 1335 | if t == rawExtTyp { |
| 1336 | x.linef("} else { r.DecodeExt(%s%v, 0, nil)", addrPfx, varname) |
| 1337 | return |
| 1338 | } |
| 1339 | |
| 1340 | // only check for extensions if the type is named, and has a packagePath. |
| 1341 | if !x.nx && genImportPath(t) != "" && t.Name() != "" { |
| 1342 | // first check if extensions are configued, before doing the interface conversion |
| 1343 | // x.linef("} else if z.HasExtensions() && z.DecExt(%s) {", varname) |
| 1344 | yy := fmt.Sprintf("%sxt%s", genTempVarPfx, mi) |
| 1345 | x.linef("} else if %s := z.Extension(z.I2Rtid(%s)); %s != nil { z.DecExtension(%s, %s) ", yy, varname, yy, varname, yy) |
| 1346 | } |
| 1347 | |
| 1348 | if ti2.bu || ti2.bup { // t.Implements(binaryUnmarshalerTyp) || tptr.Implements(binaryUnmarshalerTyp) { |
| 1349 | x.linef("} else if z.DecBinary() { z.DecBinaryUnmarshal(%s%v) ", addrPfx, varname) |
| 1350 | } |
| 1351 | if ti2.ju || ti2.jup { // t.Implements(jsonUnmarshalerTyp) || tptr.Implements(jsonUnmarshalerTyp) { |
| 1352 | x.linef("} else if !z.DecBinary() && z.IsJSONHandle() { z.DecJSONUnmarshal(%s%v)", addrPfx, varname) |
| 1353 | } else if ti2.tu || ti2.tup { // t.Implements(textUnmarshalerTyp) || tptr.Implements(textUnmarshalerTyp) { |
| 1354 | x.linef("} else if !z.DecBinary() { z.DecTextUnmarshal(%s%v)", addrPfx, varname) |
| 1355 | } |
| 1356 | |
| 1357 | x.line("} else {") |
| 1358 | |
| 1359 | if x.decTryAssignPrimitive(varname, t, isptr) { |
| 1360 | return |
| 1361 | } |
| 1362 | |
| 1363 | switch t.Kind() { |
| 1364 | case reflect.Array, reflect.Chan: |
| 1365 | x.xtraSM(varname, t, false, isptr) |
| 1366 | case reflect.Slice: |
| 1367 | // if a []uint8, call dedicated function |
| 1368 | // if a known fastpath slice, call dedicated function |
| 1369 | // else write encode function in-line. |
| 1370 | // - if elements are primitives or Selfers, call dedicated function on each member. |
| 1371 | // - else call Encoder.encode(XXX) on it. |
| 1372 | if rtid == uint8SliceTypId { |
| 1373 | x.linef("%s%s = r.DecodeBytes(%s(%s[]byte)(%s), false)", |
| 1374 | ptrPfx, varname, ptrPfx, ptrPfx, varname) |
| 1375 | } else if fastpathAV.index(rtid) != -1 { |
| 1376 | g := x.newGenV(t) |
| 1377 | x.linef("z.F.%sX(%s%s, d)", g.MethodNamePfx("Dec", false), addrPfx, varname) |
| 1378 | } else { |
| 1379 | x.xtraSM(varname, t, false, isptr) |
| 1380 | // x.decListFallback(varname, rtid, false, t) |
| 1381 | } |
| 1382 | case reflect.Map: |
| 1383 | // if a known fastpath map, call dedicated function |
| 1384 | // else write encode function in-line. |
| 1385 | // - if elements are primitives or Selfers, call dedicated function on each member. |
| 1386 | // - else call Encoder.encode(XXX) on it. |
| 1387 | if fastpathAV.index(rtid) != -1 { |
| 1388 | g := x.newGenV(t) |
| 1389 | x.linef("z.F.%sX(%s%s, d)", g.MethodNamePfx("Dec", false), addrPfx, varname) |
| 1390 | } else { |
| 1391 | x.xtraSM(varname, t, false, isptr) |
| 1392 | // x.decMapFallback(varname, rtid, t) |
| 1393 | } |
| 1394 | case reflect.Struct: |
| 1395 | if inlist { |
| 1396 | // no need to create temp variable if isptr, or x.F or x[F] |
| 1397 | if isptr || strings.IndexByte(varname, '.') != -1 || strings.IndexByte(varname, '[') != -1 { |
| 1398 | x.decStruct(varname, rtid, t) |
| 1399 | } else { |
| 1400 | varname2 := genTempVarPfx + "j" + mi |
| 1401 | x.line(varname2 + " := &" + varname) |
| 1402 | x.decStruct(varname2, rtid, t) |
| 1403 | } |
| 1404 | } else { |
| 1405 | // delete(x.td, rtid) |
| 1406 | x.line("z.DecFallback(" + addrPfx + varname + ", false)") |
| 1407 | } |
| 1408 | default: |
| 1409 | if rtidAdded { |
| 1410 | delete(x.te, rtid) |
| 1411 | } |
| 1412 | x.line("z.DecFallback(" + addrPfx + varname + ", true)") |
| 1413 | } |
| 1414 | } |
| 1415 | |
| 1416 | func (x *genRunner) decTryAssignPrimitive(varname string, t reflect.Type, isptr bool) (done bool) { |
| 1417 | // This should only be used for exact primitives (ie un-named types). |
| 1418 | // Named types may be implementations of Selfer, Unmarshaler, etc. |
| 1419 | // They should be handled by dec(...) |
| 1420 | |
| 1421 | var ptr string |
| 1422 | if isptr { |
| 1423 | ptr = "*" |
| 1424 | } |
| 1425 | switch t.Kind() { |
| 1426 | case reflect.Int: |
| 1427 | x.linef("%s%s = (%s)(z.C.IntV(r.DecodeInt64(), codecSelferBitsize%s))", ptr, varname, x.genTypeName(t), x.xs) |
| 1428 | case reflect.Int8: |
| 1429 | x.linef("%s%s = (%s)(z.C.IntV(r.DecodeInt64(), 8))", ptr, varname, x.genTypeName(t)) |
| 1430 | case reflect.Int16: |
| 1431 | x.linef("%s%s = (%s)(z.C.IntV(r.DecodeInt64(), 16))", ptr, varname, x.genTypeName(t)) |
| 1432 | case reflect.Int32: |
| 1433 | x.linef("%s%s = (%s)(z.C.IntV(r.DecodeInt64(), 32))", ptr, varname, x.genTypeName(t)) |
| 1434 | case reflect.Int64: |
| 1435 | x.linef("%s%s = (%s)(r.DecodeInt64())", ptr, varname, x.genTypeName(t)) |
| 1436 | |
| 1437 | case reflect.Uint: |
| 1438 | x.linef("%s%s = (%s)(z.C.UintV(r.DecodeUint64(), codecSelferBitsize%s))", ptr, varname, x.genTypeName(t), x.xs) |
| 1439 | case reflect.Uint8: |
| 1440 | x.linef("%s%s = (%s)(z.C.UintV(r.DecodeUint64(), 8))", ptr, varname, x.genTypeName(t)) |
| 1441 | case reflect.Uint16: |
| 1442 | x.linef("%s%s = (%s)(z.C.UintV(r.DecodeUint64(), 16))", ptr, varname, x.genTypeName(t)) |
| 1443 | case reflect.Uint32: |
| 1444 | x.linef("%s%s = (%s)(z.C.UintV(r.DecodeUint64(), 32))", ptr, varname, x.genTypeName(t)) |
| 1445 | case reflect.Uint64: |
| 1446 | x.linef("%s%s = (%s)(r.DecodeUint64())", ptr, varname, x.genTypeName(t)) |
| 1447 | case reflect.Uintptr: |
| 1448 | x.linef("%s%s = (%s)(z.C.UintV(r.DecodeUint64(), codecSelferBitsize%s))", ptr, varname, x.genTypeName(t), x.xs) |
| 1449 | |
| 1450 | case reflect.Float32: |
| 1451 | x.linef("%s%s = (%s)(r.DecodeFloat32As64())", ptr, varname, x.genTypeName(t)) |
| 1452 | case reflect.Float64: |
| 1453 | x.linef("%s%s = (%s)(r.DecodeFloat64())", ptr, varname, x.genTypeName(t)) |
| 1454 | |
| 1455 | case reflect.Bool: |
| 1456 | x.linef("%s%s = (%s)(r.DecodeBool())", ptr, varname, x.genTypeName(t)) |
| 1457 | case reflect.String: |
| 1458 | x.linef("%s%s = (%s)(r.DecodeString())", ptr, varname, x.genTypeName(t)) |
| 1459 | default: |
| 1460 | return false |
| 1461 | } |
| 1462 | return true |
| 1463 | } |
| 1464 | |
| 1465 | func (x *genRunner) decListFallback(varname string, rtid uintptr, t reflect.Type) { |
| 1466 | if t.AssignableTo(uint8SliceTyp) { |
| 1467 | x.line("*" + varname + " = r.DecodeBytes(*((*[]byte)(" + varname + ")), false)") |
| 1468 | return |
| 1469 | } |
| 1470 | if t.Kind() == reflect.Array && t.Elem().Kind() == reflect.Uint8 { |
| 1471 | x.linef("r.DecodeBytes( ((*[%d]byte)(%s))[:], true)", t.Len(), varname) |
| 1472 | return |
| 1473 | } |
| 1474 | type tstruc struct { |
| 1475 | TempVar string |
| 1476 | Rand string |
| 1477 | Varname string |
| 1478 | CTyp string |
| 1479 | Typ string |
| 1480 | Immutable bool |
| 1481 | Size int |
| 1482 | } |
| 1483 | telem := t.Elem() |
| 1484 | ts := tstruc{genTempVarPfx, x.varsfx(), varname, x.genTypeName(t), x.genTypeName(telem), genIsImmutable(telem), int(telem.Size())} |
| 1485 | |
| 1486 | funcs := make(template.FuncMap) |
| 1487 | |
| 1488 | funcs["decLineVar"] = func(varname string) string { |
| 1489 | x.decVar(varname, "", telem, false, true) |
| 1490 | return "" |
| 1491 | } |
| 1492 | funcs["var"] = func(s string) string { |
| 1493 | return ts.TempVar + s + ts.Rand |
| 1494 | } |
| 1495 | funcs["zero"] = func() string { |
| 1496 | return x.genZeroValueR(telem) |
| 1497 | } |
| 1498 | funcs["isArray"] = func() bool { |
| 1499 | return t.Kind() == reflect.Array |
| 1500 | } |
| 1501 | funcs["isSlice"] = func() bool { |
| 1502 | return t.Kind() == reflect.Slice |
| 1503 | } |
| 1504 | funcs["isChan"] = func() bool { |
| 1505 | return t.Kind() == reflect.Chan |
| 1506 | } |
| 1507 | tm, err := template.New("").Funcs(funcs).Parse(genDecListTmpl) |
| 1508 | if err != nil { |
| 1509 | panic(err) |
| 1510 | } |
| 1511 | if err = tm.Execute(x.w, &ts); err != nil { |
| 1512 | panic(err) |
| 1513 | } |
| 1514 | } |
| 1515 | |
| 1516 | func (x *genRunner) decMapFallback(varname string, rtid uintptr, t reflect.Type) { |
| 1517 | type tstruc struct { |
| 1518 | TempVar string |
| 1519 | Sfx string |
| 1520 | Rand string |
| 1521 | Varname string |
| 1522 | KTyp string |
| 1523 | Typ string |
| 1524 | Size int |
| 1525 | } |
| 1526 | telem := t.Elem() |
| 1527 | tkey := t.Key() |
| 1528 | ts := tstruc{ |
| 1529 | genTempVarPfx, x.xs, x.varsfx(), varname, x.genTypeName(tkey), |
| 1530 | x.genTypeName(telem), int(telem.Size() + tkey.Size()), |
| 1531 | } |
| 1532 | |
| 1533 | funcs := make(template.FuncMap) |
| 1534 | funcs["decElemZero"] = func() string { |
| 1535 | return x.genZeroValueR(telem) |
| 1536 | } |
| 1537 | funcs["decElemKindImmutable"] = func() bool { |
| 1538 | return genIsImmutable(telem) |
| 1539 | } |
| 1540 | funcs["decElemKindPtr"] = func() bool { |
| 1541 | return telem.Kind() == reflect.Ptr |
| 1542 | } |
| 1543 | funcs["decElemKindIntf"] = func() bool { |
| 1544 | return telem.Kind() == reflect.Interface |
| 1545 | } |
| 1546 | funcs["decLineVarK"] = func(varname string) string { |
| 1547 | x.decVar(varname, "", tkey, false, true) |
| 1548 | return "" |
| 1549 | } |
| 1550 | funcs["decLineVar"] = func(varname, decodedNilVarname string) string { |
| 1551 | x.decVar(varname, decodedNilVarname, telem, false, true) |
| 1552 | return "" |
| 1553 | } |
| 1554 | funcs["var"] = func(s string) string { |
| 1555 | return ts.TempVar + s + ts.Rand |
| 1556 | } |
| 1557 | |
| 1558 | tm, err := template.New("").Funcs(funcs).Parse(genDecMapTmpl) |
| 1559 | if err != nil { |
| 1560 | panic(err) |
| 1561 | } |
| 1562 | if err = tm.Execute(x.w, &ts); err != nil { |
| 1563 | panic(err) |
| 1564 | } |
| 1565 | } |
| 1566 | |
| 1567 | func (x *genRunner) decStructMapSwitch(kName string, varname string, rtid uintptr, t reflect.Type) { |
| 1568 | ti := x.ti.get(rtid, t) |
| 1569 | tisfi := ti.sfiSrc // always use sequence from file. decStruct expects same thing. |
| 1570 | x.line("switch (" + kName + ") {") |
| 1571 | var newbuf, nilbuf genBuf |
| 1572 | for _, si := range tisfi { |
| 1573 | x.line("case \"" + si.encName + "\":") |
| 1574 | newbuf.reset() |
| 1575 | nilbuf.reset() |
| 1576 | t2 := x.decVarInitPtr(varname, "", t, si, &newbuf, &nilbuf) |
| 1577 | x.linef("if r.TryDecodeAsNil() { %s } else { %s", nilbuf.buf, newbuf.buf) |
| 1578 | x.decVarMain(varname+"."+t2.Name, x.varsfx(), t2.Type, false) |
| 1579 | x.line("}") |
| 1580 | } |
| 1581 | x.line("default:") |
| 1582 | // pass the slice here, so that the string will not escape, and maybe save allocation |
| 1583 | x.line("z.DecStructFieldNotFound(-1, " + kName + ")") |
| 1584 | x.line("} // end switch " + kName) |
| 1585 | } |
| 1586 | |
| 1587 | func (x *genRunner) decStructMap(varname, lenvarname string, rtid uintptr, t reflect.Type, style genStructMapStyle) { |
| 1588 | tpfx := genTempVarPfx |
| 1589 | ti := x.ti.get(rtid, t) |
| 1590 | i := x.varsfx() |
| 1591 | kName := tpfx + "s" + i |
| 1592 | |
| 1593 | switch style { |
| 1594 | case genStructMapStyleLenPrefix: |
| 1595 | x.linef("for %sj%s := 0; %sj%s < %s; %sj%s++ {", tpfx, i, tpfx, i, lenvarname, tpfx, i) |
| 1596 | case genStructMapStyleCheckBreak: |
| 1597 | x.linef("for %sj%s := 0; !r.CheckBreak(); %sj%s++ {", tpfx, i, tpfx, i) |
| 1598 | default: // 0, otherwise. |
| 1599 | x.linef("var %shl%s bool = %s >= 0", tpfx, i, lenvarname) // has length |
| 1600 | x.linef("for %sj%s := 0; ; %sj%s++ {", tpfx, i, tpfx, i) |
| 1601 | x.linef("if %shl%s { if %sj%s >= %s { break }", tpfx, i, tpfx, i, lenvarname) |
| 1602 | x.line("} else { if r.CheckBreak() { break }; }") |
| 1603 | } |
| 1604 | x.line("r.ReadMapElemKey()") |
| 1605 | |
| 1606 | // emulate decstructfieldkey |
| 1607 | switch ti.keyType { |
| 1608 | case valueTypeInt: |
| 1609 | x.linef("%s := z.StringView(strconv.AppendInt(z.DecScratchArrayBuffer()[:0], r.DecodeInt64(), 10))", kName) |
| 1610 | case valueTypeUint: |
| 1611 | x.linef("%s := z.StringView(strconv.AppendUint(z.DecScratchArrayBuffer()[:0], r.DecodeUint64(), 10))", kName) |
| 1612 | case valueTypeFloat: |
| 1613 | x.linef("%s := z.StringView(strconv.AppendFloat(z.DecScratchArrayBuffer()[:0], r.DecodeFloat64(), 'f', -1, 64))", kName) |
| 1614 | default: // string |
| 1615 | x.linef("%s := z.StringView(r.DecodeStringAsBytes())", kName) |
| 1616 | } |
| 1617 | // x.linef("%s := z.StringView(r.DecStructFieldKey(codecSelferValueType%s%s, z.DecScratchArrayBuffer()))", kName, ti.keyType.String(), x.xs) |
| 1618 | |
| 1619 | x.line("r.ReadMapElemValue()") |
| 1620 | x.decStructMapSwitch(kName, varname, rtid, t) |
| 1621 | |
| 1622 | x.line("} // end for " + tpfx + "j" + i) |
| 1623 | x.line("r.ReadMapEnd()") |
| 1624 | } |
| 1625 | |
| 1626 | func (x *genRunner) decStructArray(varname, lenvarname, breakString string, rtid uintptr, t reflect.Type) { |
| 1627 | tpfx := genTempVarPfx |
| 1628 | i := x.varsfx() |
| 1629 | ti := x.ti.get(rtid, t) |
| 1630 | tisfi := ti.sfiSrc // always use sequence from file. decStruct expects same thing. |
| 1631 | x.linef("var %sj%s int", tpfx, i) |
| 1632 | x.linef("var %sb%s bool", tpfx, i) // break |
| 1633 | x.linef("var %shl%s bool = %s >= 0", tpfx, i, lenvarname) // has length |
| 1634 | var newbuf, nilbuf genBuf |
| 1635 | for _, si := range tisfi { |
| 1636 | x.linef("%sj%s++; if %shl%s { %sb%s = %sj%s > %s } else { %sb%s = r.CheckBreak() }", |
| 1637 | tpfx, i, tpfx, i, tpfx, i, |
| 1638 | tpfx, i, lenvarname, tpfx, i) |
| 1639 | x.linef("if %sb%s { r.ReadArrayEnd(); %s }", tpfx, i, breakString) |
| 1640 | x.line("r.ReadArrayElem()") |
| 1641 | newbuf.reset() |
| 1642 | nilbuf.reset() |
| 1643 | t2 := x.decVarInitPtr(varname, "", t, si, &newbuf, &nilbuf) |
| 1644 | x.linef("if r.TryDecodeAsNil() { %s } else { %s", nilbuf.buf, newbuf.buf) |
| 1645 | x.decVarMain(varname+"."+t2.Name, x.varsfx(), t2.Type, false) |
| 1646 | x.line("}") |
| 1647 | } |
| 1648 | // read remaining values and throw away. |
| 1649 | x.line("for {") |
| 1650 | x.linef("%sj%s++; if %shl%s { %sb%s = %sj%s > %s } else { %sb%s = r.CheckBreak() }", |
| 1651 | tpfx, i, tpfx, i, tpfx, i, |
| 1652 | tpfx, i, lenvarname, tpfx, i) |
| 1653 | x.linef("if %sb%s { break }", tpfx, i) |
| 1654 | x.line("r.ReadArrayElem()") |
| 1655 | x.linef(`z.DecStructFieldNotFound(%sj%s - 1, "")`, tpfx, i) |
| 1656 | x.line("}") |
| 1657 | x.line("r.ReadArrayEnd()") |
| 1658 | } |
| 1659 | |
| 1660 | func (x *genRunner) decStruct(varname string, rtid uintptr, t reflect.Type) { |
| 1661 | // varname MUST be a ptr, or a struct field or a slice element. |
| 1662 | i := x.varsfx() |
| 1663 | x.linef("%sct%s := r.ContainerType()", genTempVarPfx, i) |
| 1664 | x.linef("if %sct%s == codecSelferValueTypeMap%s {", genTempVarPfx, i, x.xs) |
| 1665 | x.line(genTempVarPfx + "l" + i + " := r.ReadMapStart()") |
| 1666 | x.linef("if %sl%s == 0 {", genTempVarPfx, i) |
| 1667 | x.line("r.ReadMapEnd()") |
| 1668 | if genUseOneFunctionForDecStructMap { |
| 1669 | x.line("} else { ") |
| 1670 | x.linef("%s.codecDecodeSelfFromMap(%sl%s, d)", varname, genTempVarPfx, i) |
| 1671 | } else { |
| 1672 | x.line("} else if " + genTempVarPfx + "l" + i + " > 0 { ") |
| 1673 | x.line(varname + ".codecDecodeSelfFromMapLenPrefix(" + genTempVarPfx + "l" + i + ", d)") |
| 1674 | x.line("} else {") |
| 1675 | x.line(varname + ".codecDecodeSelfFromMapCheckBreak(" + genTempVarPfx + "l" + i + ", d)") |
| 1676 | } |
| 1677 | x.line("}") |
| 1678 | |
| 1679 | // else if container is array |
| 1680 | x.linef("} else if %sct%s == codecSelferValueTypeArray%s {", genTempVarPfx, i, x.xs) |
| 1681 | x.line(genTempVarPfx + "l" + i + " := r.ReadArrayStart()") |
| 1682 | x.linef("if %sl%s == 0 {", genTempVarPfx, i) |
| 1683 | x.line("r.ReadArrayEnd()") |
| 1684 | x.line("} else { ") |
| 1685 | x.linef("%s.codecDecodeSelfFromArray(%sl%s, d)", varname, genTempVarPfx, i) |
| 1686 | x.line("}") |
| 1687 | // else panic |
| 1688 | x.line("} else { ") |
| 1689 | x.line("panic(errCodecSelferOnlyMapOrArrayEncodeToStruct" + x.xs + ")") |
| 1690 | x.line("} ") |
| 1691 | } |
| 1692 | |
| 1693 | // -------- |
| 1694 | |
| 1695 | type genV struct { |
| 1696 | // genV is either a primitive (Primitive != "") or a map (MapKey != "") or a slice |
| 1697 | MapKey string |
| 1698 | Elem string |
| 1699 | Primitive string |
| 1700 | Size int |
| 1701 | } |
| 1702 | |
| 1703 | func (x *genRunner) newGenV(t reflect.Type) (v genV) { |
| 1704 | switch t.Kind() { |
| 1705 | case reflect.Slice, reflect.Array: |
| 1706 | te := t.Elem() |
| 1707 | v.Elem = x.genTypeName(te) |
| 1708 | v.Size = int(te.Size()) |
| 1709 | case reflect.Map: |
| 1710 | te, tk := t.Elem(), t.Key() |
| 1711 | v.Elem = x.genTypeName(te) |
| 1712 | v.MapKey = x.genTypeName(tk) |
| 1713 | v.Size = int(te.Size() + tk.Size()) |
| 1714 | default: |
| 1715 | panic("unexpected type for newGenV. Requires map or slice type") |
| 1716 | } |
| 1717 | return |
| 1718 | } |
| 1719 | |
| 1720 | func (x *genV) MethodNamePfx(prefix string, prim bool) string { |
| 1721 | var name []byte |
| 1722 | if prefix != "" { |
| 1723 | name = append(name, prefix...) |
| 1724 | } |
| 1725 | if prim { |
| 1726 | name = append(name, genTitleCaseName(x.Primitive)...) |
| 1727 | } else { |
| 1728 | if x.MapKey == "" { |
| 1729 | name = append(name, "Slice"...) |
| 1730 | } else { |
| 1731 | name = append(name, "Map"...) |
| 1732 | name = append(name, genTitleCaseName(x.MapKey)...) |
| 1733 | } |
| 1734 | name = append(name, genTitleCaseName(x.Elem)...) |
| 1735 | } |
| 1736 | return string(name) |
| 1737 | |
| 1738 | } |
| 1739 | |
| 1740 | // genImportPath returns import path of a non-predeclared named typed, or an empty string otherwise. |
| 1741 | // |
| 1742 | // This handles the misbehaviour that occurs when 1.5-style vendoring is enabled, |
| 1743 | // where PkgPath returns the full path, including the vendoring pre-fix that should have been stripped. |
| 1744 | // We strip it here. |
| 1745 | func genImportPath(t reflect.Type) (s string) { |
| 1746 | s = t.PkgPath() |
| 1747 | if genCheckVendor { |
| 1748 | // HACK: always handle vendoring. It should be typically on in go 1.6, 1.7 |
| 1749 | s = genStripVendor(s) |
| 1750 | } |
| 1751 | return |
| 1752 | } |
| 1753 | |
| 1754 | // A go identifier is (letter|_)[letter|number|_]* |
| 1755 | func genGoIdentifier(s string, checkFirstChar bool) string { |
| 1756 | b := make([]byte, 0, len(s)) |
| 1757 | t := make([]byte, 4) |
| 1758 | var n int |
| 1759 | for i, r := range s { |
| 1760 | if checkFirstChar && i == 0 && !unicode.IsLetter(r) { |
| 1761 | b = append(b, '_') |
| 1762 | } |
| 1763 | // r must be unicode_letter, unicode_digit or _ |
| 1764 | if unicode.IsLetter(r) || unicode.IsDigit(r) { |
| 1765 | n = utf8.EncodeRune(t, r) |
| 1766 | b = append(b, t[:n]...) |
| 1767 | } else { |
| 1768 | b = append(b, '_') |
| 1769 | } |
| 1770 | } |
| 1771 | return string(b) |
| 1772 | } |
| 1773 | |
| 1774 | func genNonPtr(t reflect.Type) reflect.Type { |
| 1775 | for t.Kind() == reflect.Ptr { |
| 1776 | t = t.Elem() |
| 1777 | } |
| 1778 | return t |
| 1779 | } |
| 1780 | |
| 1781 | func genTitleCaseName(s string) string { |
| 1782 | switch s { |
| 1783 | case "interface{}", "interface {}": |
| 1784 | return "Intf" |
| 1785 | default: |
| 1786 | return strings.ToUpper(s[0:1]) + s[1:] |
| 1787 | } |
| 1788 | } |
| 1789 | |
| 1790 | func genMethodNameT(t reflect.Type, tRef reflect.Type) (n string) { |
| 1791 | var ptrPfx string |
| 1792 | for t.Kind() == reflect.Ptr { |
| 1793 | ptrPfx += "Ptrto" |
| 1794 | t = t.Elem() |
| 1795 | } |
| 1796 | tstr := t.String() |
| 1797 | if tn := t.Name(); tn != "" { |
| 1798 | if tRef != nil && genImportPath(t) == genImportPath(tRef) { |
| 1799 | return ptrPfx + tn |
| 1800 | } else { |
| 1801 | if genQNameRegex.MatchString(tstr) { |
| 1802 | return ptrPfx + strings.Replace(tstr, ".", "_", 1000) |
| 1803 | } else { |
| 1804 | return ptrPfx + genCustomTypeName(tstr) |
| 1805 | } |
| 1806 | } |
| 1807 | } |
| 1808 | switch t.Kind() { |
| 1809 | case reflect.Map: |
| 1810 | return ptrPfx + "Map" + genMethodNameT(t.Key(), tRef) + genMethodNameT(t.Elem(), tRef) |
| 1811 | case reflect.Slice: |
| 1812 | return ptrPfx + "Slice" + genMethodNameT(t.Elem(), tRef) |
| 1813 | case reflect.Array: |
| 1814 | return ptrPfx + "Array" + strconv.FormatInt(int64(t.Len()), 10) + genMethodNameT(t.Elem(), tRef) |
| 1815 | case reflect.Chan: |
| 1816 | var cx string |
| 1817 | switch t.ChanDir() { |
| 1818 | case reflect.SendDir: |
| 1819 | cx = "ChanSend" |
| 1820 | case reflect.RecvDir: |
| 1821 | cx = "ChanRecv" |
| 1822 | default: |
| 1823 | cx = "Chan" |
| 1824 | } |
| 1825 | return ptrPfx + cx + genMethodNameT(t.Elem(), tRef) |
| 1826 | default: |
| 1827 | if t == intfTyp { |
| 1828 | return ptrPfx + "Interface" |
| 1829 | } else { |
| 1830 | if tRef != nil && genImportPath(t) == genImportPath(tRef) { |
| 1831 | if t.Name() != "" { |
| 1832 | return ptrPfx + t.Name() |
| 1833 | } else { |
| 1834 | return ptrPfx + genCustomTypeName(tstr) |
| 1835 | } |
| 1836 | } else { |
| 1837 | // best way to get the package name inclusive |
| 1838 | // return ptrPfx + strings.Replace(tstr, ".", "_", 1000) |
| 1839 | // return ptrPfx + genBase64enc.EncodeToString([]byte(tstr)) |
| 1840 | if t.Name() != "" && genQNameRegex.MatchString(tstr) { |
| 1841 | return ptrPfx + strings.Replace(tstr, ".", "_", 1000) |
| 1842 | } else { |
| 1843 | return ptrPfx + genCustomTypeName(tstr) |
| 1844 | } |
| 1845 | } |
| 1846 | } |
| 1847 | } |
| 1848 | } |
| 1849 | |
| 1850 | // genCustomNameForType base64encodes the t.String() value in such a way |
| 1851 | // that it can be used within a function name. |
| 1852 | func genCustomTypeName(tstr string) string { |
| 1853 | len2 := genBase64enc.EncodedLen(len(tstr)) |
| 1854 | bufx := make([]byte, len2) |
| 1855 | genBase64enc.Encode(bufx, []byte(tstr)) |
| 1856 | for i := len2 - 1; i >= 0; i-- { |
| 1857 | if bufx[i] == '=' { |
| 1858 | len2-- |
| 1859 | } else { |
| 1860 | break |
| 1861 | } |
| 1862 | } |
| 1863 | return string(bufx[:len2]) |
| 1864 | } |
| 1865 | |
| 1866 | func genIsImmutable(t reflect.Type) (v bool) { |
| 1867 | return isImmutableKind(t.Kind()) |
| 1868 | } |
| 1869 | |
| 1870 | type genInternal struct { |
| 1871 | Version int |
| 1872 | Values []genV |
| 1873 | } |
| 1874 | |
| 1875 | func (x genInternal) FastpathLen() (l int) { |
| 1876 | for _, v := range x.Values { |
| 1877 | if v.Primitive == "" && !(v.MapKey == "" && v.Elem == "uint8") { |
| 1878 | l++ |
| 1879 | } |
| 1880 | } |
| 1881 | return |
| 1882 | } |
| 1883 | |
| 1884 | func genInternalZeroValue(s string) string { |
| 1885 | switch s { |
| 1886 | case "interface{}", "interface {}": |
| 1887 | return "nil" |
| 1888 | case "bool": |
| 1889 | return "false" |
| 1890 | case "string": |
| 1891 | return `""` |
| 1892 | default: |
| 1893 | return "0" |
| 1894 | } |
| 1895 | } |
| 1896 | |
| 1897 | var genInternalNonZeroValueIdx [5]uint64 |
| 1898 | var genInternalNonZeroValueStrs = [2][5]string{ |
| 1899 | {`"string-is-an-interface"`, "true", `"some-string"`, "11.1", "33"}, |
| 1900 | {`"string-is-an-interface-2"`, "true", `"some-string-2"`, "22.2", "44"}, |
| 1901 | } |
| 1902 | |
| 1903 | func genInternalNonZeroValue(s string) string { |
| 1904 | switch s { |
| 1905 | case "interface{}", "interface {}": |
| 1906 | genInternalNonZeroValueIdx[0]++ |
| 1907 | return genInternalNonZeroValueStrs[genInternalNonZeroValueIdx[0]%2][0] // return string, to remove ambiguity |
| 1908 | case "bool": |
| 1909 | genInternalNonZeroValueIdx[1]++ |
| 1910 | return genInternalNonZeroValueStrs[genInternalNonZeroValueIdx[1]%2][1] |
| 1911 | case "string": |
| 1912 | genInternalNonZeroValueIdx[2]++ |
| 1913 | return genInternalNonZeroValueStrs[genInternalNonZeroValueIdx[2]%2][2] |
| 1914 | case "float32", "float64", "float", "double": |
| 1915 | genInternalNonZeroValueIdx[3]++ |
| 1916 | return genInternalNonZeroValueStrs[genInternalNonZeroValueIdx[3]%2][3] |
| 1917 | default: |
| 1918 | genInternalNonZeroValueIdx[4]++ |
| 1919 | return genInternalNonZeroValueStrs[genInternalNonZeroValueIdx[4]%2][4] |
| 1920 | } |
| 1921 | } |
| 1922 | |
| 1923 | func genInternalEncCommandAsString(s string, vname string) string { |
| 1924 | switch s { |
| 1925 | case "uint", "uint8", "uint16", "uint32", "uint64": |
| 1926 | return "ee.EncodeUint(uint64(" + vname + "))" |
| 1927 | case "int", "int8", "int16", "int32", "int64": |
| 1928 | return "ee.EncodeInt(int64(" + vname + "))" |
| 1929 | case "string": |
| 1930 | return "ee.EncodeString(cUTF8, " + vname + ")" |
| 1931 | case "float32": |
| 1932 | return "ee.EncodeFloat32(" + vname + ")" |
| 1933 | case "float64": |
| 1934 | return "ee.EncodeFloat64(" + vname + ")" |
| 1935 | case "bool": |
| 1936 | return "ee.EncodeBool(" + vname + ")" |
| 1937 | // case "symbol": |
| 1938 | // return "ee.EncodeSymbol(" + vname + ")" |
| 1939 | default: |
| 1940 | return "e.encode(" + vname + ")" |
| 1941 | } |
| 1942 | } |
| 1943 | |
| 1944 | func genInternalDecCommandAsString(s string) string { |
| 1945 | switch s { |
| 1946 | case "uint": |
| 1947 | return "uint(chkOvf.UintV(dd.DecodeUint64(), uintBitsize))" |
| 1948 | case "uint8": |
| 1949 | return "uint8(chkOvf.UintV(dd.DecodeUint64(), 8))" |
| 1950 | case "uint16": |
| 1951 | return "uint16(chkOvf.UintV(dd.DecodeUint64(), 16))" |
| 1952 | case "uint32": |
| 1953 | return "uint32(chkOvf.UintV(dd.DecodeUint64(), 32))" |
| 1954 | case "uint64": |
| 1955 | return "dd.DecodeUint64()" |
| 1956 | case "uintptr": |
| 1957 | return "uintptr(chkOvf.UintV(dd.DecodeUint64(), uintBitsize))" |
| 1958 | case "int": |
| 1959 | return "int(chkOvf.IntV(dd.DecodeInt64(), intBitsize))" |
| 1960 | case "int8": |
| 1961 | return "int8(chkOvf.IntV(dd.DecodeInt64(), 8))" |
| 1962 | case "int16": |
| 1963 | return "int16(chkOvf.IntV(dd.DecodeInt64(), 16))" |
| 1964 | case "int32": |
| 1965 | return "int32(chkOvf.IntV(dd.DecodeInt64(), 32))" |
| 1966 | case "int64": |
| 1967 | return "dd.DecodeInt64()" |
| 1968 | |
| 1969 | case "string": |
| 1970 | return "dd.DecodeString()" |
| 1971 | case "float32": |
| 1972 | return "float32(chkOvf.Float32V(dd.DecodeFloat64()))" |
| 1973 | case "float64": |
| 1974 | return "dd.DecodeFloat64()" |
| 1975 | case "bool": |
| 1976 | return "dd.DecodeBool()" |
| 1977 | default: |
| 1978 | panic(errors.New("gen internal: unknown type for decode: " + s)) |
| 1979 | } |
| 1980 | } |
| 1981 | |
| 1982 | func genInternalSortType(s string, elem bool) string { |
| 1983 | for _, v := range [...]string{"int", "uint", "float", "bool", "string"} { |
| 1984 | if strings.HasPrefix(s, v) { |
| 1985 | if elem { |
| 1986 | if v == "int" || v == "uint" || v == "float" { |
| 1987 | return v + "64" |
| 1988 | } else { |
| 1989 | return v |
| 1990 | } |
| 1991 | } |
| 1992 | return v + "Slice" |
| 1993 | } |
| 1994 | } |
| 1995 | panic("sorttype: unexpected type: " + s) |
| 1996 | } |
| 1997 | |
| 1998 | func genStripVendor(s string) string { |
| 1999 | // HACK: Misbehaviour occurs in go 1.5. May have to re-visit this later. |
| 2000 | // if s contains /vendor/ OR startsWith vendor/, then return everything after it. |
| 2001 | const vendorStart = "vendor/" |
| 2002 | const vendorInline = "/vendor/" |
| 2003 | if i := strings.LastIndex(s, vendorInline); i >= 0 { |
| 2004 | s = s[i+len(vendorInline):] |
| 2005 | } else if strings.HasPrefix(s, vendorStart) { |
| 2006 | s = s[len(vendorStart):] |
| 2007 | } |
| 2008 | return s |
| 2009 | } |
| 2010 | |
| 2011 | // var genInternalMu sync.Mutex |
| 2012 | var genInternalV = genInternal{Version: genVersion} |
| 2013 | var genInternalTmplFuncs template.FuncMap |
| 2014 | var genInternalOnce sync.Once |
| 2015 | |
| 2016 | func genInternalInit() { |
| 2017 | types := [...]string{ |
| 2018 | "interface{}", |
| 2019 | "string", |
| 2020 | "float32", |
| 2021 | "float64", |
| 2022 | "uint", |
| 2023 | "uint8", |
| 2024 | "uint16", |
| 2025 | "uint32", |
| 2026 | "uint64", |
| 2027 | "uintptr", |
| 2028 | "int", |
| 2029 | "int8", |
| 2030 | "int16", |
| 2031 | "int32", |
| 2032 | "int64", |
| 2033 | "bool", |
| 2034 | } |
| 2035 | // keep as slice, so it is in specific iteration order. |
| 2036 | // Initial order was uint64, string, interface{}, int, int64 |
| 2037 | mapvaltypes := [...]string{ |
| 2038 | "interface{}", |
| 2039 | "string", |
| 2040 | "uint", |
| 2041 | "uint8", |
| 2042 | "uint16", |
| 2043 | "uint32", |
| 2044 | "uint64", |
| 2045 | "uintptr", |
| 2046 | "int", |
| 2047 | "int8", |
| 2048 | "int16", |
| 2049 | "int32", |
| 2050 | "int64", |
| 2051 | "float32", |
| 2052 | "float64", |
| 2053 | "bool", |
| 2054 | } |
| 2055 | wordSizeBytes := int(intBitsize) / 8 |
| 2056 | |
| 2057 | mapvaltypes2 := map[string]int{ |
| 2058 | "interface{}": 2 * wordSizeBytes, |
| 2059 | "string": 2 * wordSizeBytes, |
| 2060 | "uint": 1 * wordSizeBytes, |
| 2061 | "uint8": 1, |
| 2062 | "uint16": 2, |
| 2063 | "uint32": 4, |
| 2064 | "uint64": 8, |
| 2065 | "uintptr": 1 * wordSizeBytes, |
| 2066 | "int": 1 * wordSizeBytes, |
| 2067 | "int8": 1, |
| 2068 | "int16": 2, |
| 2069 | "int32": 4, |
| 2070 | "int64": 8, |
| 2071 | "float32": 4, |
| 2072 | "float64": 8, |
| 2073 | "bool": 1, |
| 2074 | } |
| 2075 | var gt = genInternal{Version: genVersion} |
| 2076 | |
| 2077 | // For each slice or map type, there must be a (symmetrical) Encode and Decode fast-path function |
| 2078 | for _, s := range types { |
| 2079 | gt.Values = append(gt.Values, genV{Primitive: s, Size: mapvaltypes2[s]}) |
| 2080 | // if s != "uint8" { // do not generate fast path for slice of bytes. Treat specially already. |
| 2081 | // gt.Values = append(gt.Values, genV{Elem: s, Size: mapvaltypes2[s]}) |
| 2082 | // } |
| 2083 | gt.Values = append(gt.Values, genV{Elem: s, Size: mapvaltypes2[s]}) |
| 2084 | if _, ok := mapvaltypes2[s]; !ok { |
| 2085 | gt.Values = append(gt.Values, genV{MapKey: s, Elem: s, Size: 2 * mapvaltypes2[s]}) |
| 2086 | } |
| 2087 | for _, ms := range mapvaltypes { |
| 2088 | gt.Values = append(gt.Values, genV{MapKey: s, Elem: ms, Size: mapvaltypes2[s] + mapvaltypes2[ms]}) |
| 2089 | } |
| 2090 | } |
| 2091 | |
| 2092 | funcs := make(template.FuncMap) |
| 2093 | // funcs["haspfx"] = strings.HasPrefix |
| 2094 | funcs["encmd"] = genInternalEncCommandAsString |
| 2095 | funcs["decmd"] = genInternalDecCommandAsString |
| 2096 | funcs["zerocmd"] = genInternalZeroValue |
| 2097 | funcs["nonzerocmd"] = genInternalNonZeroValue |
| 2098 | funcs["hasprefix"] = strings.HasPrefix |
| 2099 | funcs["sorttype"] = genInternalSortType |
| 2100 | |
| 2101 | genInternalV = gt |
| 2102 | genInternalTmplFuncs = funcs |
| 2103 | } |
| 2104 | |
| 2105 | // genInternalGoFile is used to generate source files from templates. |
| 2106 | // It is run by the program author alone. |
| 2107 | // Unfortunately, it has to be exported so that it can be called from a command line tool. |
| 2108 | // *** DO NOT USE *** |
| 2109 | func genInternalGoFile(r io.Reader, w io.Writer) (err error) { |
| 2110 | genInternalOnce.Do(genInternalInit) |
| 2111 | |
| 2112 | gt := genInternalV |
| 2113 | |
| 2114 | t := template.New("").Funcs(genInternalTmplFuncs) |
| 2115 | |
| 2116 | tmplstr, err := ioutil.ReadAll(r) |
| 2117 | if err != nil { |
| 2118 | return |
| 2119 | } |
| 2120 | |
| 2121 | if t, err = t.Parse(string(tmplstr)); err != nil { |
| 2122 | return |
| 2123 | } |
| 2124 | |
| 2125 | var out bytes.Buffer |
| 2126 | err = t.Execute(&out, gt) |
| 2127 | if err != nil { |
| 2128 | return |
| 2129 | } |
| 2130 | |
| 2131 | bout, err := format.Source(out.Bytes()) |
| 2132 | if err != nil { |
| 2133 | w.Write(out.Bytes()) // write out if error, so we can still see. |
| 2134 | // w.Write(bout) // write out if error, as much as possible, so we can still see. |
| 2135 | return |
| 2136 | } |
| 2137 | w.Write(bout) |
| 2138 | return |
| 2139 | } |