2802 lines
83 KiB
Go
2802 lines
83 KiB
Go
// Copyright (c) 2012-2020 Ugorji Nwoke. All rights reserved.
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// Use of this source code is governed by a MIT license found in the LICENSE file.
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//go:build codecgen.exec
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// +build codecgen.exec
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package codec
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import (
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"bytes"
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"encoding/base64"
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"errors"
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"fmt"
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"go/format"
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"io"
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"io/ioutil"
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"math/rand"
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"os"
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"reflect"
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"regexp"
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"sort"
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"strconv"
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"strings"
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"sync"
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"text/template"
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"time"
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// "ugorji.net/zz"
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"unicode"
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"unicode/utf8"
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)
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// ---------------------------------------------------
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// codecgen supports the full cycle of reflection-based codec:
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// - RawExt
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// - Raw
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// - Extensions
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// - (Binary|Text|JSON)(Unm|M)arshal
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// - generic by-kind
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//
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// This means that, for dynamic things, we MUST use reflection to at least get the reflect.Type.
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// In those areas, we try to only do reflection or interface-conversion when NECESSARY:
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// - Extensions, only if Extensions are configured.
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//
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// However, note following codecgen caveats:
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// - Canonical option.
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// If Canonical=true, codecgen'ed code will delegate encoding maps to reflection-based code.
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// This is due to the runtime work needed to marshal a map in canonical mode.
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// - CheckCircularRef option.
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// When encoding a struct, a circular reference can lead to a stack overflow.
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// If CheckCircularRef=true, codecgen'ed code will delegate encoding structs to reflection-based code.
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// - MissingFielder implementation.
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// If a type implements MissingFielder, a Selfer is not generated (with a warning message).
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// Statically reproducing the runtime work needed to extract the missing fields and marshal them along with the struct fields,
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// while handling the Canonical=true special case, was onerous to implement.
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//
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// During encode/decode, Selfer takes precedence.
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// A type implementing Selfer will know how to encode/decode itself statically.
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//
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// The following field types are supported:
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// array: [n]T
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// slice: []T
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// map: map[K]V
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// primitive: [u]int[n], float(32|64), bool, string
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// struct
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//
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// ---------------------------------------------------
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// Note that a Selfer cannot call (e|d).(En|De)code on itself,
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// as this will cause a circular reference, as (En|De)code will call Selfer methods.
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// Any type that implements Selfer must implement completely and not fallback to (En|De)code.
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//
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// In addition, code in this file manages the generation of fast-path implementations of
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// encode/decode of slices/maps of primitive keys/values.
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//
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// Users MUST re-generate their implementations whenever the code shape changes.
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// The generated code will panic if it was generated with a version older than the supporting library.
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// ---------------------------------------------------
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//
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// codec framework is very feature rich.
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// When encoding or decoding into an interface, it depends on the runtime type of the interface.
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// The type of the interface may be a named type, an extension, etc.
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// Consequently, we fallback to runtime codec for encoding/decoding interfaces.
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// In addition, we fallback for any value which cannot be guaranteed at runtime.
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// This allows us support ANY value, including any named types, specifically those which
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// do not implement our interfaces (e.g. Selfer).
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//
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// This explains some slowness compared to other code generation codecs (e.g. msgp).
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// This reduction in speed is only seen when your refers to interfaces,
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// e.g. type T struct { A interface{}; B []interface{}; C map[string]interface{} }
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//
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// codecgen will panic if the file was generated with an old version of the library in use.
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//
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// Note:
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// It was a conscious decision to have gen.go always explicitly call EncodeNil or TryDecodeAsNil.
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// This way, there isn't a function call overhead just to see that we should not enter a block of code.
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//
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// Note:
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// codecgen-generated code depends on the variables defined by fast-path.generated.go.
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// consequently, you cannot run with tags "codecgen codec.notfastpath".
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//
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// Note:
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// genInternalXXX functions are used for generating fast-path and other internally generated
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// files, and not for use in codecgen.
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// Size of a struct or value is not portable across machines, especially across 32-bit vs 64-bit
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// operating systems. This is due to types like int, uintptr, pointers, (and derived types like slice), etc
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// which use the natural word size on those machines, which may be 4 bytes (on 32-bit) or 8 bytes (on 64-bit).
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//
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// Within decInferLen calls, we may generate an explicit size of the entry.
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// We do this because decInferLen values are expected to be approximate,
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// and serve as a good hint on the size of the elements or key+value entry.
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//
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// Since development is done on 64-bit machines, the sizes will be roughly correctly
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// on 64-bit OS, and slightly larger than expected on 32-bit OS.
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// This is ok.
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//
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// For reference, look for 'Size' in fast-path.go.tmpl, gen-dec-(array|map).go.tmpl and gen.go (this file).
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// GenVersion is the current version of codecgen.
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//
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// MARKER: Increment this value each time codecgen changes fundamentally.
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// Also update codecgen/gen.go (minimumCodecVersion, genVersion, etc).
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// Fundamental changes are:
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// - helper methods change (signature change, new ones added, some removed, etc)
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// - codecgen command line changes
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//
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// v1: Initial Version
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// v2: -
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// v3: Changes for Kubernetes:
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// changes in signature of some unpublished helper methods and codecgen cmdline arguments.
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// v4: Removed separator support from (en|de)cDriver, and refactored codec(gen)
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// v5: changes to support faster json decoding. Let encoder/decoder maintain state of collections.
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// v6: removed unsafe from gen, and now uses codecgen.exec tag
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// v7: -
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// v8: current - we now maintain compatibility with old generated code.
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// v9: skipped
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// v10: modified encDriver and decDriver interfaces.
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// v11: remove deprecated methods of encDriver and decDriver.
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// v12: removed deprecated methods from genHelper and changed container tracking logic
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// v13: 20190603 removed DecodeString - use DecodeStringAsBytes instead
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// v14: 20190611 refactored nil handling: TryDecodeAsNil -> selective TryNil, etc
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// v15: 20190626 encDriver.EncodeString handles StringToRaw flag inside handle
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// v16: 20190629 refactoring for v1.1.6
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// v17: 20200911 reduce number of types for which we generate fast path functions (v1.1.8)
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// v18: 20201004 changed definition of genHelper...Extension (to take interface{}) and eliminated I2Rtid method
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// v19: 20201115 updated codecgen cmdline flags and optimized output
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// v20: 20201120 refactored GenHelper to one exported function
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// v21: 20210104 refactored generated code to honor ZeroCopy=true for more efficiency
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// v22: 20210118 fixed issue in generated code when encoding a type which is also a codec.Selfer
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// v23: 20210203 changed slice/map types for which we generate fast-path functions
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// v24: 20210226 robust handling for Canonical|CheckCircularRef flags and MissingFielder implementations
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// v25: 20210406 pass base reflect.Type to side(En|De)code and (En|De)codeExt calls
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const genVersion = 25
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const (
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genCodecPkg = "codec1978" // MARKER: keep in sync with codecgen/gen.go
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genTempVarPfx = "yy"
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genTopLevelVarName = "x"
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// ignore canBeNil parameter, and always set to true.
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// This is because nil can appear anywhere, so we should always check.
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genAnythingCanBeNil = true
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// if genUseOneFunctionForDecStructMap, make a single codecDecodeSelferFromMap function;
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// else make codecDecodeSelferFromMap{LenPrefix,CheckBreak} so that conditionals
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// are not executed a lot.
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//
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// From testing, it didn't make much difference in runtime, so keep as true (one function only)
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genUseOneFunctionForDecStructMap = true
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// genStructCanonical configures whether we generate 2 paths based on Canonical flag
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// when encoding struct fields.
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genStructCanonical = false
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// genFastpathCanonical configures whether we support Canonical in fast path.
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// The savings is not much.
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//
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// MARKER: This MUST ALWAYS BE TRUE. fast-path.go.tmp doesn't handle it being false.
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genFastpathCanonical = true
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// genFastpathTrimTypes configures whether we trim uncommon fastpath types.
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genFastpathTrimTypes = true
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// genDecStructArrayInlineLoopCheck configures whether we create a next function
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// for each iteration in the loop and call it, or just inline it.
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//
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// with inlining, we get better performance but about 10% larger files.
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genDecStructArrayInlineLoopCheck = true
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)
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type genStructMapStyle uint8
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type genStringDecAsBytes string
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type genStringDecZC string
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var genStringDecAsBytesTyp = reflect.TypeOf(genStringDecAsBytes(""))
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var genStringDecZCTyp = reflect.TypeOf(genStringDecZC(""))
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var genFormats = []string{"Json", "Cbor", "Msgpack", "Binc", "Simple"}
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const (
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genStructMapStyleConsolidated genStructMapStyle = iota
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genStructMapStyleLenPrefix
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genStructMapStyleCheckBreak
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)
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var (
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errGenAllTypesSamePkg = errors.New("All types must be in the same package")
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errGenExpectArrayOrMap = errors.New("unexpected type - expecting array/map/slice")
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errGenUnexpectedTypeFastpath = errors.New("fast-path: unexpected type - requires map or slice")
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genBase64enc = base64.NewEncoding("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789__")
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genQNameRegex = regexp.MustCompile(`[A-Za-z_.]+`)
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)
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type genBuf struct {
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buf []byte
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}
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func (x *genBuf) sIf(b bool, s, t string) *genBuf {
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if b {
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x.buf = append(x.buf, s...)
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} else {
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x.buf = append(x.buf, t...)
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}
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return x
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}
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func (x *genBuf) s(s string) *genBuf { x.buf = append(x.buf, s...); return x }
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func (x *genBuf) b(s []byte) *genBuf { x.buf = append(x.buf, s...); return x }
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func (x *genBuf) v() string { return string(x.buf) }
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func (x *genBuf) f(s string, args ...interface{}) { x.s(fmt.Sprintf(s, args...)) }
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func (x *genBuf) reset() {
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if x.buf != nil {
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x.buf = x.buf[:0]
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}
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}
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// genRunner holds some state used during a Gen run.
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type genRunner struct {
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w io.Writer // output
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c uint64 // counter used for generating varsfx
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f uint64 // counter used for saying false
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t []reflect.Type // list of types to run selfer on
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tc reflect.Type // currently running selfer on this type
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te map[uintptr]bool // types for which the encoder has been created
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td map[uintptr]bool // types for which the decoder has been created
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tz map[uintptr]bool // types for which GenIsZero has been created
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cp string // codec import path
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im map[string]reflect.Type // imports to add
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imn map[string]string // package names of imports to add
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imc uint64 // counter for import numbers
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is map[reflect.Type]struct{} // types seen during import search
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bp string // base PkgPath, for which we are generating for
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cpfx string // codec package prefix
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ty map[reflect.Type]struct{} // types for which GenIsZero *should* be created
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tm map[reflect.Type]struct{} // types for which enc/dec must be generated
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ts []reflect.Type // types for which enc/dec must be generated
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xs string // top level variable/constant suffix
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hn string // fn helper type name
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ti *TypeInfos
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// rr *rand.Rand // random generator for file-specific types
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jsonOnlyWhen, toArrayWhen, omitEmptyWhen *bool
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nx bool // no extensions
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}
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type genIfClause struct {
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hasIf bool
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}
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func (g *genIfClause) end(x *genRunner) {
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if g.hasIf {
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x.line("}")
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}
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}
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func (g *genIfClause) c(last bool) (v string) {
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if last {
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if g.hasIf {
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v = " } else { "
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}
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} else if g.hasIf {
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v = " } else if "
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} else {
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v = "if "
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g.hasIf = true
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}
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return
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}
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// Gen will write a complete go file containing Selfer implementations for each
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// type passed. All the types must be in the same package.
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//
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// Library users: DO NOT USE IT DIRECTLY. IT WILL CHANGE CONTINUOUSLY WITHOUT NOTICE.
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func Gen(w io.Writer, buildTags, pkgName, uid string, noExtensions bool,
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jsonOnlyWhen, toArrayWhen, omitEmptyWhen *bool,
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ti *TypeInfos, types ...reflect.Type) (warnings []string) {
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// All types passed to this method do not have a codec.Selfer method implemented directly.
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// codecgen already checks the AST and skips any types that define the codec.Selfer methods.
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// Consequently, there's no need to check and trim them if they implement codec.Selfer
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if len(types) == 0 {
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return
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}
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x := genRunner{
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w: w,
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t: types,
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te: make(map[uintptr]bool),
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td: make(map[uintptr]bool),
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tz: make(map[uintptr]bool),
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im: make(map[string]reflect.Type),
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imn: make(map[string]string),
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is: make(map[reflect.Type]struct{}),
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tm: make(map[reflect.Type]struct{}),
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ty: make(map[reflect.Type]struct{}),
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ts: []reflect.Type{},
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bp: genImportPath(types[0]),
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xs: uid,
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ti: ti,
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jsonOnlyWhen: jsonOnlyWhen,
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toArrayWhen: toArrayWhen,
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omitEmptyWhen: omitEmptyWhen,
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nx: noExtensions,
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}
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if x.ti == nil {
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x.ti = defTypeInfos
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}
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if x.xs == "" {
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rr := rand.New(rand.NewSource(time.Now().UnixNano()))
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x.xs = strconv.FormatInt(rr.Int63n(9999), 10)
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}
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// gather imports first:
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x.cp = genImportPath(reflect.TypeOf(x))
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x.imn[x.cp] = genCodecPkg
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// iterate, check if all in same package, and remove any missingfielders
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for i := 0; i < len(x.t); {
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t := x.t[i]
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// xdebugf("###########: PkgPath: '%v', Name: '%s'\n", genImportPath(t), t.Name())
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if genImportPath(t) != x.bp {
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halt.onerror(errGenAllTypesSamePkg)
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}
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ti1 := x.ti.get(rt2id(t), t)
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if ti1.flagMissingFielder || ti1.flagMissingFielderPtr {
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// output diagnostic message - that nothing generated for this type
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warnings = append(warnings, fmt.Sprintf("type: '%v' not generated; implements codec.MissingFielder", t))
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copy(x.t[i:], x.t[i+1:])
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x.t = x.t[:len(x.t)-1]
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continue
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}
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x.genRefPkgs(t)
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i++
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}
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x.line("// +build go1.6")
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if buildTags != "" {
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x.line("// +build " + buildTags)
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}
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x.line(`
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// Code generated by codecgen - DO NOT EDIT.
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`)
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x.line("package " + pkgName)
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x.line("")
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x.line("import (")
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if x.cp != x.bp {
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x.cpfx = genCodecPkg + "."
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x.linef("%s \"%s\"", genCodecPkg, x.cp)
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}
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// use a sorted set of im keys, so that we can get consistent output
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imKeys := make([]string, 0, len(x.im))
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for k := range x.im {
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imKeys = append(imKeys, k)
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}
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sort.Strings(imKeys)
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for _, k := range imKeys { // for k, _ := range x.im {
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if k == x.imn[k] {
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x.linef("\"%s\"", k)
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} else {
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x.linef("%s \"%s\"", x.imn[k], k)
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}
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}
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// add required packages
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for _, k := range [...]string{"runtime", "errors", "strconv"} { // "reflect", "fmt"
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if _, ok := x.im[k]; !ok {
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x.line("\"" + k + "\"")
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}
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}
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x.line(")")
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x.line("")
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x.line("const (")
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x.linef("// ----- content types ----")
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x.linef("codecSelferCcUTF8%s = %v", x.xs, int64(cUTF8))
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x.linef("codecSelferCcRAW%s = %v", x.xs, int64(cRAW))
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x.linef("// ----- value types used ----")
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for _, vt := range [...]valueType{
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valueTypeArray, valueTypeMap, valueTypeString,
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valueTypeInt, valueTypeUint, valueTypeFloat,
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valueTypeNil,
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} {
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x.linef("codecSelferValueType%s%s = %v", vt.String(), x.xs, int64(vt))
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}
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x.linef("codecSelferBitsize%s = uint8(32 << (^uint(0) >> 63))", x.xs)
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x.linef("codecSelferDecContainerLenNil%s = %d", x.xs, int64(containerLenNil))
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x.line(")")
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x.line("var (")
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x.line("errCodecSelferOnlyMapOrArrayEncodeToStruct" + x.xs + " = " + "errors.New(`only encoded map or array can be decoded into a struct`)")
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x.line(")")
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x.line("")
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x.hn = "codecSelfer" + x.xs
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x.line("type " + x.hn + " struct{}")
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x.line("")
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x.linef("func %sFalse() bool { return false }", x.hn)
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x.linef("func %sTrue() bool { return true }", x.hn)
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x.line("")
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x.varsfxreset()
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x.line("func init() {")
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x.linef("if %sGenVersion != %v {", x.cpfx, genVersion)
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x.line("_, file, _, _ := runtime.Caller(0)")
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x.linef("ver := strconv.FormatInt(int64(%sGenVersion), 10)", x.cpfx)
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x.outf(`panic(errors.New("codecgen version mismatch: current: %v, need " + ver + ". Re-generate file: " + file))`, genVersion)
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x.linef("}")
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if len(imKeys) > 0 {
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x.line("if false { // reference the types, but skip this branch at build/run time")
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for _, k := range imKeys {
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t := x.im[k]
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x.linef("var _ %s.%s", x.imn[k], t.Name())
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}
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x.line("} ") // close if false
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}
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x.line("}") // close init
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x.line("")
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// generate rest of type info
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for _, t := range x.t {
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x.tc = t
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x.linef("func (%s) codecSelferViaCodecgen() {}", x.genTypeName(t))
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x.selfer(true)
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x.selfer(false)
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x.tryGenIsZero(t)
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}
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for _, t := range x.ts {
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rtid := rt2id(t)
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// generate enc functions for all these slice/map types.
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x.varsfxreset()
|
|
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)
|
|
x.genRequiredMethodVars(true)
|
|
switch t.Kind() {
|
|
case reflect.Array, reflect.Slice, reflect.Chan:
|
|
x.encListFallback("v", t)
|
|
case reflect.Map:
|
|
x.encMapFallback("v", t)
|
|
default:
|
|
halt.onerror(errGenExpectArrayOrMap)
|
|
}
|
|
x.line("}")
|
|
x.line("")
|
|
|
|
// generate dec functions for all these slice/map types.
|
|
x.varsfxreset()
|
|
x.linef("func (x %s) dec%s(v *%s, d *%sDecoder) {", x.hn, x.genMethodNameT(t), x.genTypeName(t), x.cpfx)
|
|
x.genRequiredMethodVars(false)
|
|
switch t.Kind() {
|
|
case reflect.Array, reflect.Slice, reflect.Chan:
|
|
x.decListFallback("v", rtid, t)
|
|
case reflect.Map:
|
|
x.decMapFallback("v", rtid, t)
|
|
default:
|
|
halt.onerror(errGenExpectArrayOrMap)
|
|
}
|
|
x.line("}")
|
|
x.line("")
|
|
}
|
|
|
|
for t := range x.ty {
|
|
x.tryGenIsZero(t)
|
|
x.line("")
|
|
}
|
|
|
|
x.line("")
|
|
return
|
|
}
|
|
|
|
func (x *genRunner) checkForSelfer(t reflect.Type, varname string) bool {
|
|
// return varname != genTopLevelVarName && t != x.tc
|
|
// the only time we checkForSelfer is if we are not at the TOP of the generated code.
|
|
return varname != genTopLevelVarName
|
|
}
|
|
|
|
func (x *genRunner) arr2str(t reflect.Type, s string) string {
|
|
if t.Kind() == reflect.Array {
|
|
return s
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func (x *genRunner) genRequiredMethodVars(encode bool) {
|
|
x.line("var h " + x.hn)
|
|
if encode {
|
|
x.line("z, r := " + x.cpfx + "GenHelper().Encoder(e)")
|
|
} else {
|
|
x.line("z, r := " + x.cpfx + "GenHelper().Decoder(d)")
|
|
}
|
|
x.line("_, _, _ = h, z, r")
|
|
}
|
|
|
|
func (x *genRunner) genRefPkgs(t reflect.Type) {
|
|
if _, ok := x.is[t]; ok {
|
|
return
|
|
}
|
|
x.is[t] = struct{}{}
|
|
tpkg, tname := genImportPath(t), t.Name()
|
|
if tpkg != "" && tpkg != x.bp && tpkg != x.cp && tname != "" && tname[0] >= 'A' && tname[0] <= 'Z' {
|
|
if _, ok := x.im[tpkg]; !ok {
|
|
x.im[tpkg] = t
|
|
if idx := strings.LastIndex(tpkg, "/"); idx < 0 {
|
|
x.imn[tpkg] = tpkg
|
|
} else {
|
|
x.imc++
|
|
x.imn[tpkg] = "pkg" + strconv.FormatUint(x.imc, 10) + "_" + genGoIdentifier(tpkg[idx+1:], false)
|
|
}
|
|
}
|
|
}
|
|
switch t.Kind() {
|
|
case reflect.Array, reflect.Slice, reflect.Ptr, reflect.Chan:
|
|
x.genRefPkgs(t.Elem())
|
|
case reflect.Map:
|
|
x.genRefPkgs(t.Elem())
|
|
x.genRefPkgs(t.Key())
|
|
case reflect.Struct:
|
|
for i := 0; i < t.NumField(); i++ {
|
|
if fname := t.Field(i).Name; fname != "" && fname[0] >= 'A' && fname[0] <= 'Z' {
|
|
x.genRefPkgs(t.Field(i).Type)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// sayFalse will either say "false" or use a function call that returns false.
|
|
func (x *genRunner) sayFalse() string {
|
|
x.f++
|
|
if x.f%2 == 0 {
|
|
return x.hn + "False()"
|
|
}
|
|
return "false"
|
|
}
|
|
|
|
// sayFalse will either say "true" or use a function call that returns true.
|
|
func (x *genRunner) sayTrue() string {
|
|
x.f++
|
|
if x.f%2 == 0 {
|
|
return x.hn + "True()"
|
|
}
|
|
return "true"
|
|
}
|
|
|
|
func (x *genRunner) varsfx() string {
|
|
x.c++
|
|
return strconv.FormatUint(x.c, 10)
|
|
}
|
|
|
|
func (x *genRunner) varsfxreset() {
|
|
x.c = 0
|
|
}
|
|
|
|
func (x *genRunner) out(s string) {
|
|
_, err := io.WriteString(x.w, s)
|
|
genCheckErr(err)
|
|
}
|
|
|
|
func (x *genRunner) outf(s string, params ...interface{}) {
|
|
_, err := fmt.Fprintf(x.w, s, params...)
|
|
genCheckErr(err)
|
|
}
|
|
|
|
func (x *genRunner) line(s string) {
|
|
x.out(s)
|
|
if len(s) == 0 || s[len(s)-1] != '\n' {
|
|
x.out("\n")
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) lineIf(s string) {
|
|
if s != "" {
|
|
x.line(s)
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) linef(s string, params ...interface{}) {
|
|
x.outf(s, params...)
|
|
if len(s) == 0 || s[len(s)-1] != '\n' {
|
|
x.out("\n")
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) genTypeName(t reflect.Type) (n string) {
|
|
// if the type has a PkgPath, which doesn't match the current package,
|
|
// then include it.
|
|
// We cannot depend on t.String() because it includes current package,
|
|
// or t.PkgPath because it includes full import path,
|
|
//
|
|
var ptrPfx string
|
|
for t.Kind() == reflect.Ptr {
|
|
ptrPfx += "*"
|
|
t = t.Elem()
|
|
}
|
|
if tn := t.Name(); tn != "" {
|
|
return ptrPfx + x.genTypeNamePrim(t)
|
|
}
|
|
switch t.Kind() {
|
|
case reflect.Map:
|
|
return ptrPfx + "map[" + x.genTypeName(t.Key()) + "]" + x.genTypeName(t.Elem())
|
|
case reflect.Slice:
|
|
return ptrPfx + "[]" + x.genTypeName(t.Elem())
|
|
case reflect.Array:
|
|
return ptrPfx + "[" + strconv.FormatInt(int64(t.Len()), 10) + "]" + x.genTypeName(t.Elem())
|
|
case reflect.Chan:
|
|
return ptrPfx + t.ChanDir().String() + " " + x.genTypeName(t.Elem())
|
|
default:
|
|
if t == intfTyp {
|
|
return ptrPfx + "interface{}"
|
|
} else {
|
|
return ptrPfx + x.genTypeNamePrim(t)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) genTypeNamePrim(t reflect.Type) (n string) {
|
|
if t.Name() == "" {
|
|
return t.String()
|
|
} else if genImportPath(t) == "" || genImportPath(t) == genImportPath(x.tc) {
|
|
return t.Name()
|
|
} else {
|
|
return x.imn[genImportPath(t)] + "." + t.Name()
|
|
// return t.String() // best way to get the package name inclusive
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) genZeroValueR(t reflect.Type) string {
|
|
// if t is a named type, w
|
|
switch t.Kind() {
|
|
case reflect.Ptr, reflect.Interface, reflect.Chan, reflect.Func,
|
|
reflect.Slice, reflect.Map, reflect.Invalid:
|
|
return "nil"
|
|
case reflect.Bool:
|
|
return "false"
|
|
case reflect.String:
|
|
return `""`
|
|
case reflect.Struct, reflect.Array:
|
|
return x.genTypeName(t) + "{}"
|
|
default: // all numbers
|
|
return "0"
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) genMethodNameT(t reflect.Type) (s string) {
|
|
return genMethodNameT(t, x.tc)
|
|
}
|
|
|
|
func (x *genRunner) tryGenIsZero(t reflect.Type) (done bool) {
|
|
if t.Kind() != reflect.Struct || t.Implements(isCodecEmptyerTyp) {
|
|
return
|
|
}
|
|
|
|
rtid := rt2id(t)
|
|
|
|
if _, ok := x.tz[rtid]; ok {
|
|
delete(x.ty, t)
|
|
return
|
|
}
|
|
|
|
x.tz[rtid] = true
|
|
delete(x.ty, t)
|
|
|
|
ti := x.ti.get(rtid, t)
|
|
tisfi := ti.sfi.source() // always use sequence from file. decStruct expects same thing.
|
|
varname := genTopLevelVarName
|
|
|
|
x.linef("func (%s *%s) IsCodecEmpty() bool {", varname, x.genTypeName(t))
|
|
|
|
anonSeen := make(map[reflect.Type]bool)
|
|
var omitline genBuf
|
|
for _, si := range tisfi {
|
|
if si.path.parent != nil {
|
|
root := si.path.root()
|
|
if anonSeen[root.typ] {
|
|
continue
|
|
}
|
|
anonSeen[root.typ] = true
|
|
}
|
|
t2 := genOmitEmptyLinePreChecks(varname, t, si, &omitline, true)
|
|
// if Ptr, we already checked if nil above
|
|
if t2.Type.Kind() != reflect.Ptr {
|
|
x.doEncOmitEmptyLine(t2, varname, &omitline)
|
|
omitline.s(" || ")
|
|
}
|
|
}
|
|
omitline.s(" false")
|
|
x.linef("return !(%s)", omitline.v())
|
|
|
|
x.line("}")
|
|
x.line("")
|
|
return true
|
|
}
|
|
|
|
func (x *genRunner) selfer(encode bool) {
|
|
t := x.tc
|
|
// ti := x.ti.get(rt2id(t), t)
|
|
t0 := t
|
|
// always make decode use a pointer receiver,
|
|
// and structs/arrays always use a ptr receiver (encode|decode)
|
|
isptr := !encode || t.Kind() == reflect.Array || (t.Kind() == reflect.Struct && t != timeTyp)
|
|
x.varsfxreset()
|
|
|
|
fnSigPfx := "func (" + genTopLevelVarName + " "
|
|
if isptr {
|
|
fnSigPfx += "*"
|
|
}
|
|
fnSigPfx += x.genTypeName(t)
|
|
x.out(fnSigPfx)
|
|
|
|
if isptr {
|
|
t = reflect.PtrTo(t)
|
|
}
|
|
if encode {
|
|
x.line(") CodecEncodeSelf(e *" + x.cpfx + "Encoder) {")
|
|
x.genRequiredMethodVars(true)
|
|
if t0.Kind() == reflect.Struct {
|
|
x.linef("if z.EncBasicHandle().CheckCircularRef { z.EncEncode(%s); return }", genTopLevelVarName)
|
|
}
|
|
x.encVar(genTopLevelVarName, t)
|
|
} else {
|
|
x.line(") CodecDecodeSelf(d *" + x.cpfx + "Decoder) {")
|
|
x.genRequiredMethodVars(false)
|
|
// do not use decVar, as there is no need to check TryDecodeAsNil
|
|
// or way to elegantly handle that, and also setting it to a
|
|
// non-nil value doesn't affect the pointer passed.
|
|
// x.decVar(genTopLevelVarName, t, false)
|
|
x.dec(genTopLevelVarName, t0, true)
|
|
}
|
|
x.line("}")
|
|
x.line("")
|
|
|
|
if encode || t0.Kind() != reflect.Struct {
|
|
return
|
|
}
|
|
|
|
// write is containerMap
|
|
if genUseOneFunctionForDecStructMap {
|
|
x.out(fnSigPfx)
|
|
x.line(") codecDecodeSelfFromMap(l int, d *" + x.cpfx + "Decoder) {")
|
|
x.genRequiredMethodVars(false)
|
|
x.decStructMap(genTopLevelVarName, "l", rt2id(t0), t0, genStructMapStyleConsolidated)
|
|
x.line("}")
|
|
x.line("")
|
|
} else {
|
|
x.out(fnSigPfx)
|
|
x.line(") codecDecodeSelfFromMapLenPrefix(l int, d *" + x.cpfx + "Decoder) {")
|
|
x.genRequiredMethodVars(false)
|
|
x.decStructMap(genTopLevelVarName, "l", rt2id(t0), t0, genStructMapStyleLenPrefix)
|
|
x.line("}")
|
|
x.line("")
|
|
|
|
x.out(fnSigPfx)
|
|
x.line(") codecDecodeSelfFromMapCheckBreak(l int, d *" + x.cpfx + "Decoder) {")
|
|
x.genRequiredMethodVars(false)
|
|
x.decStructMap(genTopLevelVarName, "l", rt2id(t0), t0, genStructMapStyleCheckBreak)
|
|
x.line("}")
|
|
x.line("")
|
|
}
|
|
|
|
// write containerArray
|
|
x.out(fnSigPfx)
|
|
x.line(") codecDecodeSelfFromArray(l int, d *" + x.cpfx + "Decoder) {")
|
|
x.genRequiredMethodVars(false)
|
|
x.decStructArray(genTopLevelVarName, "l", "return", rt2id(t0), t0)
|
|
x.line("}")
|
|
x.line("")
|
|
|
|
}
|
|
|
|
// used for chan, array, slice, map
|
|
func (x *genRunner) xtraSM(varname string, t reflect.Type, ti *typeInfo, encode, isptr bool) {
|
|
var ptrPfx, addrPfx string
|
|
if isptr {
|
|
ptrPfx = "*"
|
|
} else {
|
|
addrPfx = "&"
|
|
}
|
|
if encode {
|
|
x.linef("h.enc%s((%s%s)(%s), e)", x.genMethodNameT(t), ptrPfx, x.genTypeName(t), varname)
|
|
} else {
|
|
x.linef("h.dec%s((*%s)(%s%s), d)", x.genMethodNameT(t), x.genTypeName(t), addrPfx, varname)
|
|
}
|
|
x.registerXtraT(t, ti)
|
|
}
|
|
|
|
func (x *genRunner) registerXtraT(t reflect.Type, ti *typeInfo) {
|
|
// recursively register the types
|
|
tk := t.Kind()
|
|
if tk == reflect.Ptr {
|
|
x.registerXtraT(t.Elem(), nil)
|
|
return
|
|
}
|
|
if _, ok := x.tm[t]; ok {
|
|
return
|
|
}
|
|
|
|
switch tk {
|
|
case reflect.Chan, reflect.Slice, reflect.Array, reflect.Map:
|
|
default:
|
|
return
|
|
}
|
|
// only register the type if it will not default to a fast-path
|
|
if ti == nil {
|
|
ti = x.ti.get(rt2id(t), t)
|
|
}
|
|
if _, rtidu := genFastpathUnderlying(t, ti.rtid, ti); fastpathAvIndex(rtidu) != -1 {
|
|
return
|
|
}
|
|
x.tm[t] = struct{}{}
|
|
x.ts = append(x.ts, t)
|
|
// check if this refers to any xtra types eg. a slice of array: add the array
|
|
x.registerXtraT(t.Elem(), nil)
|
|
if tk == reflect.Map {
|
|
x.registerXtraT(t.Key(), nil)
|
|
}
|
|
}
|
|
|
|
// encVar will encode a variable.
|
|
// The parameter, t, is the reflect.Type of the variable itself
|
|
func (x *genRunner) encVar(varname string, t reflect.Type) {
|
|
var checkNil bool
|
|
// case reflect.Ptr, reflect.Interface, reflect.Slice, reflect.Map, reflect.Chan:
|
|
// do not include checkNil for slice and maps, as we already checkNil below it
|
|
switch t.Kind() {
|
|
case reflect.Ptr, reflect.Interface, reflect.Chan:
|
|
checkNil = true
|
|
}
|
|
x.encVarChkNil(varname, t, checkNil)
|
|
}
|
|
|
|
func (x *genRunner) encVarChkNil(varname string, t reflect.Type, checkNil bool) {
|
|
if checkNil {
|
|
x.linef("if %s == nil { r.EncodeNil() } else {", varname)
|
|
}
|
|
|
|
switch t.Kind() {
|
|
case reflect.Ptr:
|
|
telem := t.Elem()
|
|
tek := telem.Kind()
|
|
if tek == reflect.Array || (tek == reflect.Struct && telem != timeTyp) {
|
|
x.enc(varname, genNonPtr(t), true)
|
|
break
|
|
}
|
|
i := x.varsfx()
|
|
x.line(genTempVarPfx + i + " := *" + varname)
|
|
x.enc(genTempVarPfx+i, genNonPtr(t), false)
|
|
case reflect.Struct, reflect.Array:
|
|
if t == timeTyp {
|
|
x.enc(varname, t, false)
|
|
break
|
|
}
|
|
i := x.varsfx()
|
|
x.line(genTempVarPfx + i + " := &" + varname)
|
|
x.enc(genTempVarPfx+i, t, true)
|
|
default:
|
|
x.enc(varname, t, false)
|
|
}
|
|
|
|
if checkNil {
|
|
x.line("}")
|
|
}
|
|
}
|
|
|
|
// enc will encode a variable (varname) of type t, where t represents T.
|
|
// if t is !time.Time and t is of kind reflect.Struct or reflect.Array, varname is of type *T
|
|
// (to prevent copying),
|
|
// else t is of type T
|
|
func (x *genRunner) enc(varname string, t reflect.Type, isptr bool) {
|
|
rtid := rt2id(t)
|
|
ti2 := x.ti.get(rtid, t)
|
|
// We call CodecEncodeSelf if one of the following are honored:
|
|
// - the type already implements Selfer, call that
|
|
// - the type has a Selfer implementation just created, use that
|
|
// - the type is in the list of the ones we will generate for, but it is not currently being generated
|
|
|
|
mi := x.varsfx()
|
|
// tptr := reflect.PtrTo(t)
|
|
// tk := t.Kind()
|
|
|
|
// check if
|
|
// - type is time.Time, RawExt, Raw
|
|
// - the type implements (Text|JSON|Binary)(Unm|M)arshal
|
|
|
|
var hasIf genIfClause
|
|
defer hasIf.end(x) // end if block (if necessary)
|
|
|
|
var ptrPfx, addrPfx string
|
|
if isptr {
|
|
ptrPfx = "*"
|
|
} else {
|
|
addrPfx = "&"
|
|
}
|
|
|
|
if t == timeTyp {
|
|
x.linef("%s z.EncBasicHandle().TimeBuiltin() { r.EncodeTime(%s%s)", hasIf.c(false), ptrPfx, varname)
|
|
// return
|
|
}
|
|
if t == rawTyp {
|
|
x.linef("%s z.EncRaw(%s%s)", hasIf.c(true), ptrPfx, varname)
|
|
return
|
|
}
|
|
if t == rawExtTyp {
|
|
x.linef("%s r.EncodeRawExt(%s%s)", hasIf.c(true), addrPfx, varname)
|
|
return
|
|
}
|
|
// only check for extensions if extensions are configured,
|
|
// and the type is named, and has a packagePath,
|
|
// and this is not the CodecEncodeSelf or CodecDecodeSelf method (i.e. it is not a Selfer)
|
|
if !x.nx && varname != genTopLevelVarName && t != genStringDecAsBytesTyp &&
|
|
t != genStringDecZCTyp && genImportPath(t) != "" && t.Name() != "" {
|
|
yy := fmt.Sprintf("%sxt%s", genTempVarPfx, mi)
|
|
x.linef("%s %s := z.Extension(%s); %s != nil { z.EncExtension(%s, %s) ",
|
|
hasIf.c(false), yy, varname, yy, varname, yy)
|
|
}
|
|
|
|
if x.checkForSelfer(t, varname) {
|
|
if ti2.flagSelfer {
|
|
x.linef("%s %s.CodecEncodeSelf(e)", hasIf.c(true), varname)
|
|
return
|
|
} else if ti2.flagSelferPtr {
|
|
x.linef("%s %ssf%s := &%s", hasIf.c(true), genTempVarPfx, mi, varname)
|
|
x.linef("%ssf%s.CodecEncodeSelf(e)", genTempVarPfx, mi)
|
|
return
|
|
}
|
|
|
|
if _, ok := x.te[rtid]; ok {
|
|
x.linef("%s %s.CodecEncodeSelf(e)", hasIf.c(true), varname)
|
|
return
|
|
}
|
|
}
|
|
|
|
inlist := false
|
|
for _, t0 := range x.t {
|
|
if t == t0 {
|
|
inlist = true
|
|
if x.checkForSelfer(t, varname) {
|
|
x.linef("%s %s.CodecEncodeSelf(e)", hasIf.c(true), varname)
|
|
return
|
|
}
|
|
break
|
|
}
|
|
}
|
|
|
|
var rtidAdded bool
|
|
if t == x.tc {
|
|
x.te[rtid] = true
|
|
rtidAdded = true
|
|
}
|
|
|
|
if ti2.flagBinaryMarshaler {
|
|
x.linef("%s z.EncBinary() { z.EncBinaryMarshal(%s%v) ", hasIf.c(false), ptrPfx, varname)
|
|
} else if ti2.flagBinaryMarshalerPtr {
|
|
x.linef("%s z.EncBinary() { z.EncBinaryMarshal(%s%v) ", hasIf.c(false), addrPfx, varname)
|
|
}
|
|
|
|
if ti2.flagJsonMarshaler {
|
|
x.linef("%s !z.EncBinary() && z.IsJSONHandle() { z.EncJSONMarshal(%s%v) ", hasIf.c(false), ptrPfx, varname)
|
|
} else if ti2.flagJsonMarshalerPtr {
|
|
x.linef("%s !z.EncBinary() && z.IsJSONHandle() { z.EncJSONMarshal(%s%v) ", hasIf.c(false), addrPfx, varname)
|
|
} else if ti2.flagTextMarshaler {
|
|
x.linef("%s !z.EncBinary() { z.EncTextMarshal(%s%v) ", hasIf.c(false), ptrPfx, varname)
|
|
} else if ti2.flagTextMarshalerPtr {
|
|
x.linef("%s !z.EncBinary() { z.EncTextMarshal(%s%v) ", hasIf.c(false), addrPfx, varname)
|
|
}
|
|
|
|
x.lineIf(hasIf.c(true))
|
|
|
|
switch t.Kind() {
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
x.line("r.EncodeInt(int64(" + varname + "))")
|
|
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
|
|
x.line("r.EncodeUint(uint64(" + varname + "))")
|
|
case reflect.Float32:
|
|
x.line("r.EncodeFloat32(float32(" + varname + "))")
|
|
case reflect.Float64:
|
|
x.line("r.EncodeFloat64(float64(" + varname + "))")
|
|
case reflect.Complex64:
|
|
x.linef("z.EncEncodeComplex64(complex64(%s))", varname)
|
|
case reflect.Complex128:
|
|
x.linef("z.EncEncodeComplex128(complex128(%s))", varname)
|
|
case reflect.Bool:
|
|
x.line("r.EncodeBool(bool(" + varname + "))")
|
|
case reflect.String:
|
|
x.linef("r.EncodeString(string(%s))", varname)
|
|
case reflect.Chan:
|
|
x.xtraSM(varname, t, ti2, true, false)
|
|
// x.encListFallback(varname, rtid, t)
|
|
case reflect.Array:
|
|
_, rtidu := genFastpathUnderlying(t, rtid, ti2)
|
|
if fastpathAvIndex(rtidu) != -1 {
|
|
g := x.newFastpathGenV(ti2.key)
|
|
x.linef("z.F.%sV((%s)(%s[:]), e)", g.MethodNamePfx("Enc", false), x.genTypeName(ti2.key), varname)
|
|
} else {
|
|
x.xtraSM(varname, t, ti2, true, true)
|
|
}
|
|
case reflect.Slice:
|
|
// if nil, call dedicated function
|
|
// if a []byte, call dedicated function
|
|
// if a known fastpath slice, call dedicated function
|
|
// else write encode function in-line.
|
|
// - if elements are primitives or Selfers, call dedicated function on each member.
|
|
// - else call Encoder.encode(XXX) on it.
|
|
|
|
x.linef("if %s == nil { r.EncodeNil() } else {", varname)
|
|
if rtid == uint8SliceTypId {
|
|
x.line("r.EncodeStringBytesRaw([]byte(" + varname + "))")
|
|
} else {
|
|
tu, rtidu := genFastpathUnderlying(t, rtid, ti2)
|
|
if fastpathAvIndex(rtidu) != -1 {
|
|
g := x.newFastpathGenV(tu)
|
|
if rtid == rtidu {
|
|
x.linef("z.F.%sV(%s, e)", g.MethodNamePfx("Enc", false), varname)
|
|
} else {
|
|
x.linef("z.F.%sV((%s)(%s), e)", g.MethodNamePfx("Enc", false), x.genTypeName(tu), varname)
|
|
}
|
|
} else {
|
|
x.xtraSM(varname, t, ti2, true, false)
|
|
}
|
|
}
|
|
x.linef("} // end block: if %s slice == nil", varname)
|
|
case reflect.Map:
|
|
// if nil, call dedicated function
|
|
// if a known fastpath map, call dedicated function
|
|
// else write encode function in-line.
|
|
// - if elements are primitives or Selfers, call dedicated function on each member.
|
|
// - else call Encoder.encode(XXX) on it.
|
|
x.linef("if %s == nil { r.EncodeNil() } else {", varname)
|
|
tu, rtidu := genFastpathUnderlying(t, rtid, ti2)
|
|
if fastpathAvIndex(rtidu) != -1 {
|
|
g := x.newFastpathGenV(tu)
|
|
if rtid == rtidu {
|
|
x.linef("z.F.%sV(%s, e)", g.MethodNamePfx("Enc", false), varname)
|
|
} else {
|
|
x.linef("z.F.%sV((%s)(%s), e)", g.MethodNamePfx("Enc", false), x.genTypeName(tu), varname)
|
|
}
|
|
} else {
|
|
x.xtraSM(varname, t, ti2, true, false)
|
|
}
|
|
x.linef("} // end block: if %s map == nil", varname)
|
|
case reflect.Struct:
|
|
if !inlist {
|
|
delete(x.te, rtid)
|
|
x.line("z.EncFallback(" + varname + ")")
|
|
break
|
|
}
|
|
x.encStruct(varname, rtid, t)
|
|
default:
|
|
if rtidAdded {
|
|
delete(x.te, rtid)
|
|
}
|
|
x.line("z.EncFallback(" + varname + ")")
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) encZero(t reflect.Type) {
|
|
switch t.Kind() {
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
x.line("r.EncodeInt(0)")
|
|
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
|
|
x.line("r.EncodeUint(0)")
|
|
case reflect.Float32:
|
|
x.line("r.EncodeFloat32(0)")
|
|
case reflect.Float64:
|
|
x.line("r.EncodeFloat64(0)")
|
|
case reflect.Complex64:
|
|
x.line("z.EncEncodeComplex64(0)")
|
|
case reflect.Complex128:
|
|
x.line("z.EncEncodeComplex128(0)")
|
|
case reflect.Bool:
|
|
x.line("r.EncodeBool(false)")
|
|
case reflect.String:
|
|
x.linef(`r.EncodeString("")`)
|
|
default:
|
|
x.line("r.EncodeNil()")
|
|
}
|
|
}
|
|
|
|
func genOmitEmptyLinePreChecks(varname string, t reflect.Type, si *structFieldInfo, omitline *genBuf, oneLevel bool) (t2 reflect.StructField) {
|
|
// xdebug2f("calling genOmitEmptyLinePreChecks on: %v", t)
|
|
t2typ := t
|
|
varname3 := varname
|
|
// go through the loop, record the t2 field explicitly,
|
|
// and gather the omit line if embedded in pointers.
|
|
fullpath := si.path.fullpath()
|
|
for i, path := range fullpath {
|
|
for t2typ.Kind() == reflect.Ptr {
|
|
t2typ = t2typ.Elem()
|
|
}
|
|
t2 = t2typ.Field(int(path.index))
|
|
t2typ = t2.Type
|
|
varname3 = varname3 + "." + t2.Name
|
|
// do not include actual field in the omit line.
|
|
// that is done subsequently (right after - below).
|
|
if i+1 < len(fullpath) && t2typ.Kind() == reflect.Ptr {
|
|
omitline.s(varname3).s(" != nil && ")
|
|
}
|
|
if oneLevel {
|
|
break
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func (x *genRunner) doEncOmitEmptyLine(t2 reflect.StructField, varname string, buf *genBuf) {
|
|
x.f = 0
|
|
x.encOmitEmptyLine(t2, varname, buf)
|
|
}
|
|
|
|
func (x *genRunner) encOmitEmptyLine(t2 reflect.StructField, varname string, buf *genBuf) {
|
|
// xdebugf("calling encOmitEmptyLine on: %v", t2.Type)
|
|
// smartly check omitEmpty on a struct type, as it may contain uncomparable map/slice/etc.
|
|
// also, for maps/slices/arrays, check if len ! 0 (not if == zero value)
|
|
varname2 := varname + "." + t2.Name
|
|
switch t2.Type.Kind() {
|
|
case reflect.Struct:
|
|
rtid2 := rt2id(t2.Type)
|
|
ti2 := x.ti.get(rtid2, t2.Type)
|
|
// xdebugf(">>>> structfield: omitempty: type: %s, field: %s\n", t2.Type.Name(), t2.Name)
|
|
if ti2.rtid == timeTypId {
|
|
buf.s("!(").s(varname2).s(".IsZero())")
|
|
break
|
|
}
|
|
if ti2.flagIsZeroerPtr || ti2.flagIsZeroer {
|
|
buf.s("!(").s(varname2).s(".IsZero())")
|
|
break
|
|
}
|
|
if t2.Type.Implements(isCodecEmptyerTyp) {
|
|
buf.s("!(").s(varname2).s(".IsCodecEmpty())")
|
|
break
|
|
}
|
|
_, ok := x.tz[rtid2]
|
|
if ok {
|
|
buf.s("!(").s(varname2).s(".IsCodecEmpty())")
|
|
break
|
|
}
|
|
// if we *should* create a IsCodecEmpty for it, but haven't yet, add it here
|
|
// _, ok = x.ty[rtid2]
|
|
if genImportPath(t2.Type) == x.bp {
|
|
x.ty[t2.Type] = struct{}{}
|
|
buf.s("!(").s(varname2).s(".IsCodecEmpty())")
|
|
break
|
|
}
|
|
if ti2.flagComparable {
|
|
buf.s(varname2).s(" != ").s(x.genZeroValueR(t2.Type))
|
|
break
|
|
}
|
|
// fmt.Printf("???? !!!! We shouldn't get to this point !!!! ???? - for type: %v\n", t2.Type)
|
|
// buf.s("(")
|
|
buf.s(x.sayFalse()) // buf.s("false")
|
|
for i, n := 0, t2.Type.NumField(); i < n; i++ {
|
|
f := t2.Type.Field(i)
|
|
if f.PkgPath != "" { // unexported
|
|
continue
|
|
}
|
|
buf.s(" || ")
|
|
x.encOmitEmptyLine(f, varname2, buf)
|
|
}
|
|
//buf.s(")")
|
|
case reflect.Bool:
|
|
buf.s("bool(").s(varname2).s(")")
|
|
case reflect.Map, reflect.Slice, reflect.Array, reflect.Chan:
|
|
buf.s("len(").s(varname2).s(") != 0")
|
|
default:
|
|
buf.s(varname2).s(" != ").s(x.genZeroValueR(t2.Type))
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) encStruct(varname string, rtid uintptr, t reflect.Type) {
|
|
// Use knowledge from structfieldinfo (mbs, encodable fields. Ignore omitempty. )
|
|
// replicate code in kStruct i.e. for each field, deref type to non-pointer, and call x.enc on it
|
|
|
|
// if t === type currently running selfer on, do for all
|
|
ti := x.ti.get(rtid, t)
|
|
i := x.varsfx()
|
|
// sepVarname := genTempVarPfx + "sep" + i
|
|
numfieldsvar := genTempVarPfx + "q" + i
|
|
ti2arrayvar := genTempVarPfx + "r" + i
|
|
struct2arrvar := genTempVarPfx + "2arr" + i
|
|
|
|
tisfi := ti.sfi.source() // always use sequence from file. decStruct expects same thing.
|
|
|
|
type genFQN struct {
|
|
i string
|
|
fqname string
|
|
nilLine genBuf
|
|
nilVar string
|
|
canNil bool
|
|
sf reflect.StructField
|
|
}
|
|
|
|
genFQNs := make([]genFQN, len(tisfi))
|
|
for j, si := range tisfi {
|
|
q := &genFQNs[j]
|
|
q.i = x.varsfx()
|
|
q.nilVar = genTempVarPfx + "n" + q.i
|
|
q.canNil = false
|
|
q.fqname = varname
|
|
{
|
|
t2typ := t
|
|
fullpath := si.path.fullpath()
|
|
for _, path := range fullpath {
|
|
for t2typ.Kind() == reflect.Ptr {
|
|
t2typ = t2typ.Elem()
|
|
}
|
|
q.sf = t2typ.Field(int(path.index))
|
|
t2typ = q.sf.Type
|
|
q.fqname += "." + q.sf.Name
|
|
if t2typ.Kind() == reflect.Ptr {
|
|
if !q.canNil {
|
|
q.nilLine.f("%s == nil", q.fqname)
|
|
q.canNil = true
|
|
} else {
|
|
q.nilLine.f(" || %s == nil", q.fqname)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// x.line(sepVarname + " := !z.EncBinary()")
|
|
x.linef("%s := z.EncBasicHandle().StructToArray", struct2arrvar)
|
|
// x.linef("_, _ = %s, %s", sepVarname, struct2arrvar)
|
|
x.linef("_ = %s", struct2arrvar)
|
|
x.linef("const %s bool = %v // struct tag has 'toArray'", ti2arrayvar, ti.toArray)
|
|
|
|
for j := range genFQNs {
|
|
q := &genFQNs[j]
|
|
if q.canNil {
|
|
x.linef("var %s bool = %s", q.nilVar, q.nilLine.v())
|
|
}
|
|
}
|
|
|
|
// var nn int
|
|
// due to omitEmpty, we need to calculate the
|
|
// number of non-empty things we write out first.
|
|
// This is required as we need to pre-determine the size of the container,
|
|
// to support length-prefixing.
|
|
omitEmptySometimes := x.omitEmptyWhen == nil
|
|
omitEmptyAlways := (x.omitEmptyWhen != nil && *(x.omitEmptyWhen))
|
|
// omitEmptyNever := (x.omitEmptyWhen != nil && !*(x.omitEmptyWhen))
|
|
|
|
toArraySometimes := x.toArrayWhen == nil
|
|
toArrayAlways := (x.toArrayWhen != nil && *(x.toArrayWhen))
|
|
toArrayNever := (x.toArrayWhen != nil && !(*(x.toArrayWhen)))
|
|
|
|
if (omitEmptySometimes && ti.anyOmitEmpty) || omitEmptyAlways {
|
|
x.linef("var %s = [%v]bool{ // should field at this index be written?", numfieldsvar, len(tisfi))
|
|
|
|
for _, si := range tisfi {
|
|
if omitEmptySometimes && !si.path.omitEmpty {
|
|
x.linef("true, // %s", si.encName) // si.fieldName)
|
|
continue
|
|
}
|
|
var omitline genBuf
|
|
t2 := genOmitEmptyLinePreChecks(varname, t, si, &omitline, false)
|
|
x.doEncOmitEmptyLine(t2, varname, &omitline)
|
|
x.linef("%s, // %s", omitline.v(), si.encName) // si.fieldName)
|
|
}
|
|
x.line("}")
|
|
x.linef("_ = %s", numfieldsvar)
|
|
}
|
|
|
|
if toArraySometimes {
|
|
x.linef("if %s || %s {", ti2arrayvar, struct2arrvar) // if ti.toArray
|
|
}
|
|
if toArraySometimes || toArrayAlways {
|
|
x.linef("z.EncWriteArrayStart(%d)", len(tisfi))
|
|
|
|
for j, si := range tisfi {
|
|
doOmitEmptyCheck := (omitEmptySometimes && si.path.omitEmpty) || omitEmptyAlways
|
|
q := &genFQNs[j]
|
|
// if the type of the field is a Selfer, or one of the ones
|
|
if q.canNil {
|
|
x.linef("if %s { z.EncWriteArrayElem(); r.EncodeNil() } else { ", q.nilVar)
|
|
}
|
|
x.linef("z.EncWriteArrayElem()")
|
|
if doOmitEmptyCheck {
|
|
x.linef("if %s[%v] {", numfieldsvar, j)
|
|
}
|
|
x.encVarChkNil(q.fqname, q.sf.Type, false)
|
|
if doOmitEmptyCheck {
|
|
x.linef("} else {")
|
|
x.encZero(q.sf.Type)
|
|
x.linef("}")
|
|
}
|
|
if q.canNil {
|
|
x.line("}")
|
|
}
|
|
}
|
|
|
|
x.line("z.EncWriteArrayEnd()")
|
|
}
|
|
if toArraySometimes {
|
|
x.linef("} else {") // if not ti.toArray
|
|
}
|
|
if toArraySometimes || toArrayNever {
|
|
if (omitEmptySometimes && ti.anyOmitEmpty) || omitEmptyAlways {
|
|
x.linef("var %snn%s int", genTempVarPfx, i)
|
|
x.linef("for _, b := range %s { if b { %snn%s++ } }", numfieldsvar, genTempVarPfx, i)
|
|
x.linef("z.EncWriteMapStart(%snn%s)", genTempVarPfx, i)
|
|
x.linef("%snn%s = %v", genTempVarPfx, i, 0)
|
|
} else {
|
|
x.linef("z.EncWriteMapStart(%d)", len(tisfi))
|
|
}
|
|
|
|
fn := func(tisfi []*structFieldInfo) {
|
|
for j, si := range tisfi {
|
|
q := &genFQNs[j]
|
|
doOmitEmptyCheck := (omitEmptySometimes && si.path.omitEmpty) || omitEmptyAlways
|
|
if doOmitEmptyCheck {
|
|
x.linef("if %s[%v] {", numfieldsvar, j)
|
|
}
|
|
x.linef("z.EncWriteMapElemKey()")
|
|
|
|
// emulate EncStructFieldKey
|
|
switch ti.keyType {
|
|
case valueTypeInt:
|
|
x.linef("r.EncodeInt(z.M.Int(strconv.ParseInt(`%s`, 10, 64)))", si.encName)
|
|
case valueTypeUint:
|
|
x.linef("r.EncodeUint(z.M.Uint(strconv.ParseUint(`%s`, 10, 64)))", si.encName)
|
|
case valueTypeFloat:
|
|
x.linef("r.EncodeFloat64(z.M.Float(strconv.ParseFloat(`%s`, 64)))", si.encName)
|
|
default: // string
|
|
if x.jsonOnlyWhen == nil {
|
|
if si.path.encNameAsciiAlphaNum {
|
|
x.linef(`if z.IsJSONHandle() { z.WriteStr("\"%s\"") } else { `, si.encName)
|
|
}
|
|
x.linef("r.EncodeString(`%s`)", si.encName)
|
|
if si.path.encNameAsciiAlphaNum {
|
|
x.linef("}")
|
|
}
|
|
} else if *(x.jsonOnlyWhen) {
|
|
if si.path.encNameAsciiAlphaNum {
|
|
x.linef(`z.WriteStr("\"%s\"")`, si.encName)
|
|
} else {
|
|
x.linef("r.EncodeString(`%s`)", si.encName)
|
|
}
|
|
} else {
|
|
x.linef("r.EncodeString(`%s`)", si.encName)
|
|
}
|
|
}
|
|
x.line("z.EncWriteMapElemValue()")
|
|
if q.canNil {
|
|
x.line("if " + q.nilVar + " { r.EncodeNil() } else { ")
|
|
x.encVarChkNil(q.fqname, q.sf.Type, false)
|
|
x.line("}")
|
|
} else {
|
|
x.encVarChkNil(q.fqname, q.sf.Type, false)
|
|
}
|
|
if doOmitEmptyCheck {
|
|
x.line("}")
|
|
}
|
|
}
|
|
}
|
|
|
|
if genStructCanonical {
|
|
x.linef("if z.EncBasicHandle().Canonical {") // if Canonical block
|
|
fn(ti.sfi.sorted())
|
|
x.linef("} else {") // else !cononical block
|
|
fn(ti.sfi.source())
|
|
x.linef("}") // end if Canonical block
|
|
} else {
|
|
fn(tisfi)
|
|
}
|
|
|
|
x.line("z.EncWriteMapEnd()")
|
|
}
|
|
if toArraySometimes {
|
|
x.linef("} ") // end if/else ti.toArray
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) encListFallback(varname string, t reflect.Type) {
|
|
x.linef("if %s == nil { r.EncodeNil(); return }", varname)
|
|
elemBytes := t.Elem().Kind() == reflect.Uint8
|
|
if t.AssignableTo(uint8SliceTyp) {
|
|
x.linef("r.EncodeStringBytesRaw([]byte(%s))", varname)
|
|
return
|
|
}
|
|
if t.Kind() == reflect.Array && elemBytes {
|
|
x.linef("r.EncodeStringBytesRaw(((*[%d]byte)(%s))[:])", t.Len(), varname)
|
|
return
|
|
}
|
|
i := x.varsfx()
|
|
if t.Kind() == reflect.Chan {
|
|
type ts struct {
|
|
Label, Chan, Slice, Sfx string
|
|
}
|
|
tm, err := template.New("").Parse(genEncChanTmpl)
|
|
genCheckErr(err)
|
|
x.linef("if %s == nil { r.EncodeNil() } else { ", varname)
|
|
x.linef("var sch%s []%s", i, x.genTypeName(t.Elem()))
|
|
err = tm.Execute(x.w, &ts{"Lsch" + i, varname, "sch" + i, i})
|
|
genCheckErr(err)
|
|
if elemBytes {
|
|
x.linef("r.EncodeStringBytesRaw([]byte(%s))", "sch"+i)
|
|
x.line("}")
|
|
return
|
|
}
|
|
varname = "sch" + i
|
|
}
|
|
|
|
x.line("z.EncWriteArrayStart(len(" + varname + "))")
|
|
|
|
// x.linef("for _, %sv%s := range %s {", genTempVarPfx, i, varname)
|
|
// x.linef("z.EncWriteArrayElem()")
|
|
// x.encVar(genTempVarPfx+"v"+i, t.Elem())
|
|
// x.line("}")
|
|
|
|
x.linef("for %sv%s := range %s {", genTempVarPfx, i, varname)
|
|
x.linef("z.EncWriteArrayElem()")
|
|
x.encVar(fmt.Sprintf("%s[%sv%s]", varname, genTempVarPfx, i), t.Elem())
|
|
x.line("}")
|
|
|
|
x.line("z.EncWriteArrayEnd()")
|
|
if t.Kind() == reflect.Chan {
|
|
x.line("}")
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) encMapFallback(varname string, t reflect.Type) {
|
|
x.linef("if %s == nil { r.EncodeNil()", varname)
|
|
x.linef("} else if z.EncBasicHandle().Canonical { z.EncEncodeMapNonNil(%s)", varname)
|
|
x.line("} else {")
|
|
i := x.varsfx()
|
|
x.linef("z.EncWriteMapStart(len(%s))", varname)
|
|
x.linef("for %sk%s, %sv%s := range %s {", genTempVarPfx, i, genTempVarPfx, i, varname)
|
|
x.linef("z.EncWriteMapElemKey()")
|
|
x.encVar(genTempVarPfx+"k"+i, t.Key())
|
|
x.line("z.EncWriteMapElemValue()")
|
|
x.encVar(genTempVarPfx+"v"+i, t.Elem())
|
|
x.line("}")
|
|
x.line("z.EncWriteMapEnd()")
|
|
x.line("}")
|
|
}
|
|
|
|
func (x *genRunner) decVarInitPtr(varname, nilvar string, t reflect.Type, si *structFieldInfo,
|
|
newbuf, nilbuf *genBuf) (varname3 string, t2 reflect.StructField) {
|
|
//we must accommodate anonymous fields, where the embedded field is a nil pointer in the value.
|
|
// t2 = t.FieldByIndex(si.is)
|
|
varname3 = varname
|
|
t2typ := t
|
|
t2kind := t2typ.Kind()
|
|
var nilbufed bool
|
|
if si != nil {
|
|
fullpath := si.path.fullpath()
|
|
for _, path := range fullpath {
|
|
// only one-level pointers can be seen in a type
|
|
if t2typ.Kind() == reflect.Ptr {
|
|
t2typ = t2typ.Elem()
|
|
}
|
|
t2 = t2typ.Field(int(path.index))
|
|
t2typ = t2.Type
|
|
varname3 = varname3 + "." + t2.Name
|
|
t2kind = t2typ.Kind()
|
|
if t2kind != reflect.Ptr {
|
|
continue
|
|
}
|
|
if newbuf != nil {
|
|
if len(newbuf.buf) > 0 {
|
|
newbuf.s("\n")
|
|
}
|
|
newbuf.f("if %s == nil { %s = new(%s) }", varname3, varname3, x.genTypeName(t2typ.Elem()))
|
|
}
|
|
if nilbuf != nil {
|
|
if !nilbufed {
|
|
nilbuf.s("if ").s(varname3).s(" != nil")
|
|
nilbufed = true
|
|
} else {
|
|
nilbuf.s(" && ").s(varname3).s(" != nil")
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if nilbuf != nil {
|
|
if nilbufed {
|
|
nilbuf.s(" { ").s("// remove the if-true\n")
|
|
}
|
|
if nilvar != "" {
|
|
nilbuf.s(nilvar).s(" = true")
|
|
} else if tk := t2typ.Kind(); tk == reflect.Ptr {
|
|
if strings.IndexByte(varname3, '.') != -1 || strings.IndexByte(varname3, '[') != -1 {
|
|
nilbuf.s(varname3).s(" = nil")
|
|
} else {
|
|
nilbuf.s("*").s(varname3).s(" = ").s(x.genZeroValueR(t2typ.Elem()))
|
|
}
|
|
} else {
|
|
nilbuf.s(varname3).s(" = ").s(x.genZeroValueR(t2typ))
|
|
}
|
|
if nilbufed {
|
|
nilbuf.s("}")
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// decVar takes a variable called varname, of type t
|
|
func (x *genRunner) decVarMain(varname, rand string, t reflect.Type, checkNotNil bool) {
|
|
// We only encode as nil if a nillable value.
|
|
// This removes some of the wasted checks for TryDecodeAsNil.
|
|
// We need to think about this more, to see what happens if omitempty, etc
|
|
// cause a nil value to be stored when something is expected.
|
|
// This could happen when decoding from a struct encoded as an array.
|
|
// For that, decVar should be called with canNil=true, to force true as its value.
|
|
var varname2 string
|
|
if t.Kind() != reflect.Ptr {
|
|
if t.PkgPath() != "" || !x.decTryAssignPrimitive(varname, t, false) {
|
|
x.dec(varname, t, false)
|
|
}
|
|
} else {
|
|
if checkNotNil {
|
|
x.linef("if %s == nil { %s = new(%s) }", varname, varname, x.genTypeName(t.Elem()))
|
|
}
|
|
// Ensure we set underlying ptr to a non-nil value (so we can deref to it later).
|
|
// There's a chance of a **T in here which is nil.
|
|
var ptrPfx string
|
|
for t = t.Elem(); t.Kind() == reflect.Ptr; t = t.Elem() {
|
|
ptrPfx += "*"
|
|
if checkNotNil {
|
|
x.linef("if %s%s == nil { %s%s = new(%s)}", ptrPfx, varname, ptrPfx, varname, x.genTypeName(t))
|
|
}
|
|
}
|
|
// Should we create temp var if a slice/map indexing? No. dec(...) can now handle it.
|
|
|
|
if ptrPfx == "" {
|
|
x.dec(varname, t, true)
|
|
} else {
|
|
varname2 = genTempVarPfx + "z" + rand
|
|
x.line(varname2 + " := " + ptrPfx + varname)
|
|
x.dec(varname2, t, true)
|
|
}
|
|
}
|
|
}
|
|
|
|
// decVar takes a variable called varname, of type t
|
|
func (x *genRunner) decVar(varname, nilvar string, t reflect.Type, canBeNil, checkNotNil bool) {
|
|
|
|
// We only encode as nil if a nillable value.
|
|
// This removes some of the wasted checks for TryDecodeAsNil.
|
|
// We need to think about this more, to see what happens if omitempty, etc
|
|
// cause a nil value to be stored when something is expected.
|
|
// This could happen when decoding from a struct encoded as an array.
|
|
// For that, decVar should be called with canNil=true, to force true as its value.
|
|
|
|
i := x.varsfx()
|
|
if t.Kind() == reflect.Ptr {
|
|
var buf genBuf
|
|
x.decVarInitPtr(varname, nilvar, t, nil, nil, &buf)
|
|
x.linef("if r.TryNil() { %s } else {", buf.buf)
|
|
x.decVarMain(varname, i, t, checkNotNil)
|
|
x.line("} ")
|
|
} else {
|
|
x.decVarMain(varname, i, t, checkNotNil)
|
|
}
|
|
}
|
|
|
|
// dec will decode a variable (varname) of type t or ptrTo(t) if isptr==true.
|
|
func (x *genRunner) dec(varname string, t reflect.Type, isptr bool) {
|
|
// assumptions:
|
|
// - the varname is to a pointer already. No need to take address of it
|
|
// - t is always a baseType T (not a *T, etc).
|
|
rtid := rt2id(t)
|
|
ti2 := x.ti.get(rtid, t)
|
|
|
|
// check if
|
|
// - type is time.Time, Raw, RawExt
|
|
// - the type implements (Text|JSON|Binary)(Unm|M)arshal
|
|
|
|
mi := x.varsfx()
|
|
|
|
var hasIf genIfClause
|
|
defer hasIf.end(x)
|
|
|
|
var ptrPfx, addrPfx string
|
|
if isptr {
|
|
ptrPfx = "*"
|
|
} else {
|
|
addrPfx = "&"
|
|
}
|
|
if t == timeTyp {
|
|
x.linef("%s z.DecBasicHandle().TimeBuiltin() { %s%v = r.DecodeTime()", hasIf.c(false), ptrPfx, varname)
|
|
// return
|
|
}
|
|
if t == rawTyp {
|
|
x.linef("%s %s%v = z.DecRaw()", hasIf.c(true), ptrPfx, varname)
|
|
return
|
|
}
|
|
|
|
if t == rawExtTyp {
|
|
x.linef("%s r.DecodeExt(%s%v, 0, nil)", hasIf.c(true), addrPfx, varname)
|
|
return
|
|
}
|
|
|
|
// only check for extensions if extensions are configured,
|
|
// and the type is named, and has a packagePath,
|
|
// and this is not the CodecEncodeSelf or CodecDecodeSelf method (i.e. it is not a Selfer)
|
|
// xdebugf("genRunner.dec: varname: %v, t: %v, genImportPath: %v, t.Name: %v", varname, t, genImportPath(t), t.Name())
|
|
if !x.nx && varname != genTopLevelVarName && t != genStringDecAsBytesTyp &&
|
|
t != genStringDecZCTyp && genImportPath(t) != "" && t.Name() != "" {
|
|
// first check if extensions are configued, before doing the interface conversion
|
|
yy := fmt.Sprintf("%sxt%s", genTempVarPfx, mi)
|
|
x.linef("%s %s := z.Extension(%s); %s != nil { z.DecExtension(%s%s, %s) ", hasIf.c(false), yy, varname, yy, addrPfx, varname, yy)
|
|
}
|
|
|
|
if x.checkForSelfer(t, varname) {
|
|
if ti2.flagSelfer {
|
|
x.linef("%s %s.CodecDecodeSelf(d)", hasIf.c(true), varname)
|
|
return
|
|
}
|
|
if ti2.flagSelferPtr {
|
|
x.linef("%s %s.CodecDecodeSelf(d)", hasIf.c(true), varname)
|
|
return
|
|
}
|
|
if _, ok := x.td[rtid]; ok {
|
|
x.linef("%s %s.CodecDecodeSelf(d)", hasIf.c(true), varname)
|
|
return
|
|
}
|
|
}
|
|
|
|
inlist := false
|
|
for _, t0 := range x.t {
|
|
if t == t0 {
|
|
inlist = true
|
|
if x.checkForSelfer(t, varname) {
|
|
x.linef("%s %s.CodecDecodeSelf(d)", hasIf.c(true), varname)
|
|
return
|
|
}
|
|
break
|
|
}
|
|
}
|
|
|
|
var rtidAdded bool
|
|
if t == x.tc {
|
|
x.td[rtid] = true
|
|
rtidAdded = true
|
|
}
|
|
|
|
if ti2.flagBinaryUnmarshaler {
|
|
x.linef("%s z.DecBinary() { z.DecBinaryUnmarshal(%s%v) ", hasIf.c(false), ptrPfx, varname)
|
|
} else if ti2.flagBinaryUnmarshalerPtr {
|
|
x.linef("%s z.DecBinary() { z.DecBinaryUnmarshal(%s%v) ", hasIf.c(false), addrPfx, varname)
|
|
}
|
|
if ti2.flagJsonUnmarshaler {
|
|
x.linef("%s !z.DecBinary() && z.IsJSONHandle() { z.DecJSONUnmarshal(%s%v)", hasIf.c(false), ptrPfx, varname)
|
|
} else if ti2.flagJsonUnmarshalerPtr {
|
|
x.linef("%s !z.DecBinary() && z.IsJSONHandle() { z.DecJSONUnmarshal(%s%v)", hasIf.c(false), addrPfx, varname)
|
|
} else if ti2.flagTextUnmarshaler {
|
|
x.linef("%s !z.DecBinary() { z.DecTextUnmarshal(%s%v)", hasIf.c(false), ptrPfx, varname)
|
|
} else if ti2.flagTextUnmarshalerPtr {
|
|
x.linef("%s !z.DecBinary() { z.DecTextUnmarshal(%s%v)", hasIf.c(false), addrPfx, varname)
|
|
}
|
|
|
|
x.lineIf(hasIf.c(true))
|
|
|
|
if x.decTryAssignPrimitive(varname, t, isptr) {
|
|
return
|
|
}
|
|
|
|
switch t.Kind() {
|
|
case reflect.Chan:
|
|
x.xtraSM(varname, t, ti2, false, isptr)
|
|
case reflect.Array:
|
|
_, rtidu := genFastpathUnderlying(t, rtid, ti2)
|
|
if fastpathAvIndex(rtidu) != -1 {
|
|
g := x.newFastpathGenV(ti2.key)
|
|
x.linef("z.F.%sN((%s)(%s[:]), d)", g.MethodNamePfx("Dec", false), x.genTypeName(ti2.key), varname)
|
|
} else {
|
|
x.xtraSM(varname, t, ti2, false, isptr)
|
|
}
|
|
case reflect.Slice:
|
|
// if a []byte, call dedicated function
|
|
// if a known fastpath slice, call dedicated function
|
|
// else write encode function in-line.
|
|
// - if elements are primitives or Selfers, call dedicated function on each member.
|
|
// - else call Encoder.encode(XXX) on it.
|
|
|
|
if rtid == uint8SliceTypId {
|
|
x.linef("%s%s = z.DecodeBytesInto(%s(%s[]byte)(%s))", ptrPfx, varname, ptrPfx, ptrPfx, varname)
|
|
} else {
|
|
tu, rtidu := genFastpathUnderlying(t, rtid, ti2)
|
|
if fastpathAvIndex(rtidu) != -1 {
|
|
g := x.newFastpathGenV(tu)
|
|
if rtid == rtidu {
|
|
x.linef("z.F.%sX(%s%s, d)", g.MethodNamePfx("Dec", false), addrPfx, varname)
|
|
} else {
|
|
x.linef("z.F.%sX((*%s)(%s%s), d)", g.MethodNamePfx("Dec", false), x.genTypeName(tu), addrPfx, varname)
|
|
}
|
|
} else {
|
|
x.xtraSM(varname, t, ti2, false, isptr)
|
|
// x.decListFallback(varname, rtid, false, t)
|
|
}
|
|
}
|
|
case reflect.Map:
|
|
// if a known fastpath map, call dedicated function
|
|
// else write encode function in-line.
|
|
// - if elements are primitives or Selfers, call dedicated function on each member.
|
|
// - else call Encoder.encode(XXX) on it.
|
|
|
|
tu, rtidu := genFastpathUnderlying(t, rtid, ti2)
|
|
if fastpathAvIndex(rtidu) != -1 {
|
|
g := x.newFastpathGenV(tu)
|
|
if rtid == rtidu {
|
|
x.linef("z.F.%sX(%s%s, d)", g.MethodNamePfx("Dec", false), addrPfx, varname)
|
|
} else {
|
|
x.linef("z.F.%sX((*%s)(%s%s), d)", g.MethodNamePfx("Dec", false), x.genTypeName(tu), addrPfx, varname)
|
|
}
|
|
} else {
|
|
x.xtraSM(varname, t, ti2, false, isptr)
|
|
}
|
|
case reflect.Struct:
|
|
if inlist {
|
|
// no need to create temp variable if isptr, or x.F or x[F]
|
|
if isptr || strings.IndexByte(varname, '.') != -1 || strings.IndexByte(varname, '[') != -1 {
|
|
x.decStruct(varname, rtid, t)
|
|
} else {
|
|
varname2 := genTempVarPfx + "j" + mi
|
|
x.line(varname2 + " := &" + varname)
|
|
x.decStruct(varname2, rtid, t)
|
|
}
|
|
} else {
|
|
// delete(x.td, rtid)
|
|
x.line("z.DecFallback(" + addrPfx + varname + ", false)")
|
|
}
|
|
default:
|
|
if rtidAdded {
|
|
delete(x.te, rtid)
|
|
}
|
|
x.line("z.DecFallback(" + addrPfx + varname + ", true)")
|
|
}
|
|
}
|
|
|
|
func (x *genRunner) decTryAssignPrimitive(varname string, t reflect.Type, isptr bool) (done bool) {
|
|
// This should only be used for exact primitives (ie un-named types).
|
|
// Named types may be implementations of Selfer, Unmarshaler, etc.
|
|
// They should be handled by dec(...)
|
|
|
|
var ptr string
|
|
if isptr {
|
|
ptr = "*"
|
|
}
|
|
switch t.Kind() {
|
|
case reflect.Int:
|
|
x.linef("%s%s = (%s)(z.C.IntV(r.DecodeInt64(), codecSelferBitsize%s))", ptr, varname, x.genTypeName(t), x.xs)
|
|
case reflect.Int8:
|
|
x.linef("%s%s = (%s)(z.C.IntV(r.DecodeInt64(), 8))", ptr, varname, x.genTypeName(t))
|
|
case reflect.Int16:
|
|
x.linef("%s%s = (%s)(z.C.IntV(r.DecodeInt64(), 16))", ptr, varname, x.genTypeName(t))
|
|
case reflect.Int32:
|
|
x.linef("%s%s = (%s)(z.C.IntV(r.DecodeInt64(), 32))", ptr, varname, x.genTypeName(t))
|
|
case reflect.Int64:
|
|
x.linef("%s%s = (%s)(r.DecodeInt64())", ptr, varname, x.genTypeName(t))
|
|
|
|
case reflect.Uint:
|
|
x.linef("%s%s = (%s)(z.C.UintV(r.DecodeUint64(), codecSelferBitsize%s))", ptr, varname, x.genTypeName(t), x.xs)
|
|
case reflect.Uint8:
|
|
x.linef("%s%s = (%s)(z.C.UintV(r.DecodeUint64(), 8))", ptr, varname, x.genTypeName(t))
|
|
case reflect.Uint16:
|
|
x.linef("%s%s = (%s)(z.C.UintV(r.DecodeUint64(), 16))", ptr, varname, x.genTypeName(t))
|
|
case reflect.Uint32:
|
|
x.linef("%s%s = (%s)(z.C.UintV(r.DecodeUint64(), 32))", ptr, varname, x.genTypeName(t))
|
|
case reflect.Uint64:
|
|
x.linef("%s%s = (%s)(r.DecodeUint64())", ptr, varname, x.genTypeName(t))
|
|
case reflect.Uintptr:
|
|
x.linef("%s%s = (%s)(z.C.UintV(r.DecodeUint64(), codecSelferBitsize%s))", ptr, varname, x.genTypeName(t), x.xs)
|
|
|
|
case reflect.Float32:
|
|
x.linef("%s%s = (%s)(z.DecDecodeFloat32())", ptr, varname, x.genTypeName(t))
|
|
case reflect.Float64:
|
|
x.linef("%s%s = (%s)(r.DecodeFloat64())", ptr, varname, x.genTypeName(t))
|
|
|
|
case reflect.Complex64:
|
|
x.linef("%s%s = (%s)(complex(z.DecDecodeFloat32(), 0))", ptr, varname, x.genTypeName(t))
|
|
case reflect.Complex128:
|
|
x.linef("%s%s = (%s)(complex(r.DecodeFloat64(), 0))", ptr, varname, x.genTypeName(t))
|
|
|
|
case reflect.Bool:
|
|
x.linef("%s%s = (%s)(r.DecodeBool())", ptr, varname, x.genTypeName(t))
|
|
case reflect.String:
|
|
if t == genStringDecAsBytesTyp {
|
|
x.linef("%s%s = r.DecodeStringAsBytes()", ptr, varname)
|
|
} else if t == genStringDecZCTyp {
|
|
x.linef("%s%s = (string)(z.DecStringZC(r.DecodeStringAsBytes()))", ptr, varname)
|
|
} else {
|
|
x.linef("%s%s = (%s)(z.DecStringZC(r.DecodeStringAsBytes()))", ptr, varname, x.genTypeName(t))
|
|
}
|
|
default:
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func (x *genRunner) decListFallback(varname string, rtid uintptr, t reflect.Type) {
|
|
if t.AssignableTo(uint8SliceTyp) {
|
|
x.line("*" + varname + " = z.DecodeBytesInto(*((*[]byte)(" + varname + ")))")
|
|
return
|
|
}
|
|
if t.Kind() == reflect.Array && t.Elem().Kind() == reflect.Uint8 {
|
|
x.linef("r.DecodeBytes( ((*[%d]byte)(%s))[:])", t.Len(), varname)
|
|
return
|
|
}
|
|
type tstruc struct {
|
|
TempVar string
|
|
Sfx string
|
|
Rand string
|
|
Varname string
|
|
CTyp string
|
|
Typ string
|
|
Immutable bool
|
|
Size int
|
|
}
|
|
telem := t.Elem()
|
|
ts := tstruc{genTempVarPfx, x.xs, x.varsfx(), varname, x.genTypeName(t), x.genTypeName(telem), genIsImmutable(telem), int(telem.Size())}
|
|
|
|
funcs := make(template.FuncMap)
|
|
|
|
funcs["decLineVar"] = func(varname string) string {
|
|
x.decVar(varname, "", telem, false, true)
|
|
return ""
|
|
}
|
|
funcs["var"] = func(s string) string {
|
|
return ts.TempVar + s + ts.Rand
|
|
}
|
|
funcs["xs"] = func() string {
|
|
return ts.Sfx
|
|
}
|
|
funcs["zero"] = func() string {
|
|
return x.genZeroValueR(telem)
|
|
}
|
|
funcs["isArray"] = func() bool {
|
|
return t.Kind() == reflect.Array
|
|
}
|
|
funcs["isSlice"] = func() bool {
|
|
return t.Kind() == reflect.Slice
|
|
}
|
|
funcs["isChan"] = func() bool {
|
|
return t.Kind() == reflect.Chan
|
|
}
|
|
tm, err := template.New("").Funcs(funcs).Parse(genDecListTmpl)
|
|
genCheckErr(err)
|
|
genCheckErr(tm.Execute(x.w, &ts))
|
|
}
|
|
|
|
func (x *genRunner) decMapFallback(varname string, rtid uintptr, t reflect.Type) {
|
|
type tstruc struct {
|
|
TempVar string
|
|
Sfx string
|
|
Rand string
|
|
Varname string
|
|
KTyp string
|
|
Typ string
|
|
Size int
|
|
}
|
|
telem := t.Elem()
|
|
tkey := t.Key()
|
|
ts := tstruc{
|
|
genTempVarPfx, x.xs, x.varsfx(), varname, x.genTypeName(tkey),
|
|
x.genTypeName(telem), int(telem.Size() + tkey.Size()),
|
|
}
|
|
|
|
funcs := make(template.FuncMap)
|
|
funcs["decElemZero"] = func() string {
|
|
return x.genZeroValueR(telem)
|
|
}
|
|
funcs["decElemKindImmutable"] = func() bool {
|
|
return genIsImmutable(telem)
|
|
}
|
|
funcs["decElemKindPtr"] = func() bool {
|
|
return telem.Kind() == reflect.Ptr
|
|
}
|
|
funcs["decElemKindIntf"] = func() bool {
|
|
return telem.Kind() == reflect.Interface
|
|
}
|
|
funcs["decLineVarKStrBytes"] = func(varname string) string {
|
|
x.decVar(varname, "", genStringDecAsBytesTyp, false, true)
|
|
return ""
|
|
}
|
|
funcs["decLineVarKStrZC"] = func(varname string) string {
|
|
x.decVar(varname, "", genStringDecZCTyp, false, true)
|
|
return ""
|
|
}
|
|
funcs["decLineVarK"] = func(varname string) string {
|
|
x.decVar(varname, "", tkey, false, true)
|
|
return ""
|
|
}
|
|
funcs["decLineVar"] = func(varname, decodedNilVarname string) string {
|
|
x.decVar(varname, decodedNilVarname, telem, false, true)
|
|
return ""
|
|
}
|
|
funcs["var"] = func(s string) string {
|
|
return ts.TempVar + s + ts.Rand
|
|
}
|
|
funcs["xs"] = func() string {
|
|
return ts.Sfx
|
|
}
|
|
|
|
tm, err := template.New("").Funcs(funcs).Parse(genDecMapTmpl)
|
|
genCheckErr(err)
|
|
genCheckErr(tm.Execute(x.w, &ts))
|
|
}
|
|
|
|
func (x *genRunner) decStructMapSwitch(kName string, varname string, rtid uintptr, t reflect.Type) {
|
|
ti := x.ti.get(rtid, t)
|
|
tisfi := ti.sfi.source() // always use sequence from file. decStruct expects same thing.
|
|
x.line("switch string(" + kName + ") {")
|
|
var newbuf, nilbuf genBuf
|
|
for _, si := range tisfi {
|
|
x.line("case \"" + si.encName + "\":")
|
|
newbuf.reset()
|
|
nilbuf.reset()
|
|
varname3, t2 := x.decVarInitPtr(varname, "", t, si, &newbuf, &nilbuf)
|
|
if len(newbuf.buf) > 0 {
|
|
x.linef("if r.TryNil() { %s } else { %s", nilbuf.buf, newbuf.buf)
|
|
}
|
|
x.decVarMain(varname3, x.varsfx(), t2.Type, false)
|
|
if len(newbuf.buf) > 0 {
|
|
x.line("}")
|
|
}
|
|
}
|
|
x.line("default:")
|
|
// pass the slice here, so that the string will not escape, and maybe save allocation
|
|
x.linef("z.DecStructFieldNotFound(-1, string(%s))", kName)
|
|
x.linef("} // end switch %s", kName)
|
|
}
|
|
|
|
func (x *genRunner) decStructMap(varname, lenvarname string, rtid uintptr, t reflect.Type, style genStructMapStyle) {
|
|
tpfx := genTempVarPfx
|
|
ti := x.ti.get(rtid, t)
|
|
i := x.varsfx()
|
|
kName := tpfx + "s" + i
|
|
|
|
switch style {
|
|
case genStructMapStyleLenPrefix:
|
|
x.linef("for %sj%s := 0; %sj%s < %s; %sj%s++ {", tpfx, i, tpfx, i, lenvarname, tpfx, i)
|
|
case genStructMapStyleCheckBreak:
|
|
x.linef("for %sj%s := 0; !z.DecCheckBreak(); %sj%s++ {", tpfx, i, tpfx, i)
|
|
default: // 0, otherwise.
|
|
x.linef("var %shl%s bool = %s >= 0", tpfx, i, lenvarname) // has length
|
|
x.linef("for %sj%s := 0; ; %sj%s++ {", tpfx, i, tpfx, i)
|
|
x.linef("if %shl%s { if %sj%s >= %s { break }", tpfx, i, tpfx, i, lenvarname)
|
|
x.line("} else { if z.DecCheckBreak() { break }; }")
|
|
}
|
|
x.line("z.DecReadMapElemKey()")
|
|
|
|
// emulate decstructfieldkey
|
|
switch ti.keyType {
|
|
case valueTypeInt:
|
|
x.linef("%s := strconv.AppendInt(z.DecScratchArrayBuffer()[:0], r.DecodeInt64(), 10)", kName)
|
|
case valueTypeUint:
|
|
x.linef("%s := strconv.AppendUint(z.DecScratchArrayBuffer()[:0], r.DecodeUint64(), 10)", kName)
|
|
case valueTypeFloat:
|
|
x.linef("%s := strconv.AppendFloat(z.DecScratchArrayBuffer()[:0], r.DecodeFloat64(), 'f', -1, 64)", kName)
|
|
default: // string
|
|
x.linef("%s := r.DecodeStringAsBytes()", kName)
|
|
}
|
|
|
|
x.line("z.DecReadMapElemValue()")
|
|
x.decStructMapSwitch(kName, varname, rtid, t)
|
|
|
|
x.line("} // end for " + tpfx + "j" + i)
|
|
}
|
|
|
|
func (x *genRunner) decStructArray(varname, lenvarname, breakString string, rtid uintptr, t reflect.Type) {
|
|
tpfx := genTempVarPfx
|
|
i := x.varsfx()
|
|
ti := x.ti.get(rtid, t)
|
|
tisfi := ti.sfi.source() // always use sequence from file. decStruct expects same thing.
|
|
x.linef("var %sj%s int", tpfx, i)
|
|
x.linef("var %sb%s bool", tpfx, i) // break
|
|
x.linef("var %shl%s bool = %s >= 0", tpfx, i, lenvarname) // has length
|
|
if !genDecStructArrayInlineLoopCheck {
|
|
x.linef("var %sfn%s = func() bool { ", tpfx, i)
|
|
x.linef("%sj%s++; if %shl%s { %sb%s = %sj%s > %s } else { %sb%s = z.DecCheckBreak() };",
|
|
tpfx, i, tpfx, i, tpfx, i,
|
|
tpfx, i, lenvarname, tpfx, i)
|
|
x.linef("if %sb%s { z.DecReadArrayEnd(); return true }; return false", tpfx, i)
|
|
x.linef("} // end func %sfn%s", tpfx, i)
|
|
}
|
|
var newbuf, nilbuf genBuf
|
|
for _, si := range tisfi {
|
|
if genDecStructArrayInlineLoopCheck {
|
|
x.linef("%sj%s++; if %shl%s { %sb%s = %sj%s > %s } else { %sb%s = z.DecCheckBreak() }",
|
|
tpfx, i, tpfx, i, tpfx, i,
|
|
tpfx, i, lenvarname, tpfx, i)
|
|
x.linef("if %sb%s { z.DecReadArrayEnd(); %s }", tpfx, i, breakString)
|
|
} else {
|
|
x.linef("if %sfn%s() { %s }", tpfx, i, breakString)
|
|
}
|
|
x.line("z.DecReadArrayElem()")
|
|
newbuf.reset()
|
|
nilbuf.reset()
|
|
varname3, t2 := x.decVarInitPtr(varname, "", t, si, &newbuf, &nilbuf)
|
|
if len(newbuf.buf) > 0 {
|
|
x.linef("if r.TryNil() { %s } else { %s", nilbuf.buf, newbuf.buf)
|
|
}
|
|
x.decVarMain(varname3, x.varsfx(), t2.Type, false)
|
|
if len(newbuf.buf) > 0 {
|
|
x.line("}")
|
|
}
|
|
}
|
|
// read remaining values and throw away.
|
|
x.line("for {")
|
|
x.linef("%sj%s++; if %shl%s { %sb%s = %sj%s > %s } else { %sb%s = z.DecCheckBreak() }",
|
|
tpfx, i, tpfx, i, tpfx, i,
|
|
tpfx, i, lenvarname, tpfx, i)
|
|
x.linef("if %sb%s { break }", tpfx, i)
|
|
x.line("z.DecReadArrayElem()")
|
|
x.linef(`z.DecStructFieldNotFound(%sj%s - 1, "")`, tpfx, i)
|
|
x.line("}")
|
|
}
|
|
|
|
func (x *genRunner) decStruct(varname string, rtid uintptr, t reflect.Type) {
|
|
// varname MUST be a ptr, or a struct field or a slice element.
|
|
i := x.varsfx()
|
|
x.linef("%sct%s := r.ContainerType()", genTempVarPfx, i)
|
|
x.linef("if %sct%s == codecSelferValueTypeNil%s {", genTempVarPfx, i, x.xs)
|
|
x.linef("*(%s) = %s{}", varname, x.genTypeName(t))
|
|
x.linef("} else if %sct%s == codecSelferValueTypeMap%s {", genTempVarPfx, i, x.xs)
|
|
x.line(genTempVarPfx + "l" + i + " := z.DecReadMapStart()")
|
|
x.linef("if %sl%s == 0 {", genTempVarPfx, i)
|
|
if genUseOneFunctionForDecStructMap {
|
|
x.line("} else { ")
|
|
x.linef("%s.codecDecodeSelfFromMap(%sl%s, d)", varname, genTempVarPfx, i)
|
|
} else {
|
|
x.line("} else if " + genTempVarPfx + "l" + i + " > 0 { ")
|
|
x.line(varname + ".codecDecodeSelfFromMapLenPrefix(" + genTempVarPfx + "l" + i + ", d)")
|
|
x.line("} else {")
|
|
x.line(varname + ".codecDecodeSelfFromMapCheckBreak(" + genTempVarPfx + "l" + i + ", d)")
|
|
}
|
|
x.line("}")
|
|
x.line("z.DecReadMapEnd()")
|
|
|
|
// else if container is array
|
|
x.linef("} else if %sct%s == codecSelferValueTypeArray%s {", genTempVarPfx, i, x.xs)
|
|
x.line(genTempVarPfx + "l" + i + " := z.DecReadArrayStart()")
|
|
x.linef("if %sl%s != 0 {", genTempVarPfx, i)
|
|
x.linef("%s.codecDecodeSelfFromArray(%sl%s, d)", varname, genTempVarPfx, i)
|
|
x.line("}")
|
|
x.line("z.DecReadArrayEnd()")
|
|
// else panic
|
|
x.line("} else { ")
|
|
x.line("panic(errCodecSelferOnlyMapOrArrayEncodeToStruct" + x.xs + ")")
|
|
x.line("} ")
|
|
}
|
|
|
|
// --------
|
|
|
|
type fastpathGenV struct {
|
|
// fastpathGenV is either a primitive (Primitive != "") or a map (MapKey != "") or a slice
|
|
MapKey string
|
|
Elem string
|
|
Primitive string
|
|
Size int
|
|
NoCanonical bool
|
|
}
|
|
|
|
func (x *genRunner) newFastpathGenV(t reflect.Type) (v fastpathGenV) {
|
|
v.NoCanonical = !genFastpathCanonical
|
|
switch t.Kind() {
|
|
case reflect.Slice, reflect.Array:
|
|
te := t.Elem()
|
|
v.Elem = x.genTypeName(te)
|
|
v.Size = int(te.Size())
|
|
case reflect.Map:
|
|
te := t.Elem()
|
|
tk := t.Key()
|
|
v.Elem = x.genTypeName(te)
|
|
v.MapKey = x.genTypeName(tk)
|
|
v.Size = int(te.Size() + tk.Size())
|
|
default:
|
|
halt.onerror(errGenUnexpectedTypeFastpath)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (x *fastpathGenV) MethodNamePfx(prefix string, prim bool) string {
|
|
var name []byte
|
|
if prefix != "" {
|
|
name = append(name, prefix...)
|
|
}
|
|
if prim {
|
|
name = append(name, genTitleCaseName(x.Primitive)...)
|
|
} else {
|
|
if x.MapKey == "" {
|
|
name = append(name, "Slice"...)
|
|
} else {
|
|
name = append(name, "Map"...)
|
|
name = append(name, genTitleCaseName(x.MapKey)...)
|
|
}
|
|
name = append(name, genTitleCaseName(x.Elem)...)
|
|
}
|
|
return string(name)
|
|
}
|
|
|
|
// genImportPath returns import path of a non-predeclared named typed, or an empty string otherwise.
|
|
//
|
|
// This handles the misbehaviour that occurs when 1.5-style vendoring is enabled,
|
|
// where PkgPath returns the full path, including the vendoring pre-fix that should have been stripped.
|
|
// We strip it here.
|
|
func genImportPath(t reflect.Type) (s string) {
|
|
s = t.PkgPath()
|
|
if genCheckVendor {
|
|
// HACK: always handle vendoring. It should be typically on in go 1.6, 1.7
|
|
s = genStripVendor(s)
|
|
}
|
|
return
|
|
}
|
|
|
|
// A go identifier is (letter|_)[letter|number|_]*
|
|
func genGoIdentifier(s string, checkFirstChar bool) string {
|
|
b := make([]byte, 0, len(s))
|
|
t := make([]byte, 4)
|
|
var n int
|
|
for i, r := range s {
|
|
if checkFirstChar && i == 0 && !unicode.IsLetter(r) {
|
|
b = append(b, '_')
|
|
}
|
|
// r must be unicode_letter, unicode_digit or _
|
|
if unicode.IsLetter(r) || unicode.IsDigit(r) {
|
|
n = utf8.EncodeRune(t, r)
|
|
b = append(b, t[:n]...)
|
|
} else {
|
|
b = append(b, '_')
|
|
}
|
|
}
|
|
return string(b)
|
|
}
|
|
|
|
func genNonPtr(t reflect.Type) reflect.Type {
|
|
for t.Kind() == reflect.Ptr {
|
|
t = t.Elem()
|
|
}
|
|
return t
|
|
}
|
|
|
|
func genFastpathUnderlying(t reflect.Type, rtid uintptr, ti *typeInfo) (tu reflect.Type, rtidu uintptr) {
|
|
tu = t
|
|
rtidu = rtid
|
|
if ti.flagHasPkgPath {
|
|
tu = ti.fastpathUnderlying
|
|
rtidu = rt2id(tu)
|
|
}
|
|
return
|
|
}
|
|
|
|
func genTitleCaseName(s string) string {
|
|
switch s {
|
|
case "interface{}", "interface {}":
|
|
return "Intf"
|
|
case "[]byte", "[]uint8", "bytes":
|
|
return "Bytes"
|
|
default:
|
|
return strings.ToUpper(s[0:1]) + s[1:]
|
|
}
|
|
}
|
|
|
|
func genMethodNameT(t reflect.Type, tRef reflect.Type) (n string) {
|
|
var ptrPfx string
|
|
for t.Kind() == reflect.Ptr {
|
|
ptrPfx += "Ptrto"
|
|
t = t.Elem()
|
|
}
|
|
tstr := t.String()
|
|
if tn := t.Name(); tn != "" {
|
|
if tRef != nil && genImportPath(t) == genImportPath(tRef) {
|
|
return ptrPfx + tn
|
|
} else {
|
|
if genQNameRegex.MatchString(tstr) {
|
|
return ptrPfx + strings.Replace(tstr, ".", "_", 1000)
|
|
} else {
|
|
return ptrPfx + genCustomTypeName(tstr)
|
|
}
|
|
}
|
|
}
|
|
switch t.Kind() {
|
|
case reflect.Map:
|
|
return ptrPfx + "Map" + genMethodNameT(t.Key(), tRef) + genMethodNameT(t.Elem(), tRef)
|
|
case reflect.Slice:
|
|
return ptrPfx + "Slice" + genMethodNameT(t.Elem(), tRef)
|
|
case reflect.Array:
|
|
return ptrPfx + "Array" + strconv.FormatInt(int64(t.Len()), 10) + genMethodNameT(t.Elem(), tRef)
|
|
case reflect.Chan:
|
|
var cx string
|
|
switch t.ChanDir() {
|
|
case reflect.SendDir:
|
|
cx = "ChanSend"
|
|
case reflect.RecvDir:
|
|
cx = "ChanRecv"
|
|
default:
|
|
cx = "Chan"
|
|
}
|
|
return ptrPfx + cx + genMethodNameT(t.Elem(), tRef)
|
|
default:
|
|
if t == intfTyp {
|
|
return ptrPfx + "Interface"
|
|
} else {
|
|
if tRef != nil && genImportPath(t) == genImportPath(tRef) {
|
|
if t.Name() != "" {
|
|
return ptrPfx + t.Name()
|
|
} else {
|
|
return ptrPfx + genCustomTypeName(tstr)
|
|
}
|
|
} else {
|
|
// best way to get the package name inclusive
|
|
// return ptrPfx + strings.Replace(tstr, ".", "_", 1000)
|
|
// return ptrPfx + genBase64enc.EncodeToString([]byte(tstr))
|
|
if t.Name() != "" && genQNameRegex.MatchString(tstr) {
|
|
return ptrPfx + strings.Replace(tstr, ".", "_", 1000)
|
|
} else {
|
|
return ptrPfx + genCustomTypeName(tstr)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// genCustomNameForType base64encodes the t.String() value in such a way
|
|
// that it can be used within a function name.
|
|
func genCustomTypeName(tstr string) string {
|
|
len2 := genBase64enc.EncodedLen(len(tstr))
|
|
bufx := make([]byte, len2)
|
|
genBase64enc.Encode(bufx, []byte(tstr))
|
|
for i := len2 - 1; i >= 0; i-- {
|
|
if bufx[i] == '=' {
|
|
len2--
|
|
} else {
|
|
break
|
|
}
|
|
}
|
|
return string(bufx[:len2])
|
|
}
|
|
|
|
func genIsImmutable(t reflect.Type) (v bool) {
|
|
return scalarBitset.isset(byte(t.Kind()))
|
|
}
|
|
|
|
type genInternal struct {
|
|
Version int
|
|
Values []fastpathGenV
|
|
Formats []string
|
|
}
|
|
|
|
func (x genInternal) FastpathLen() (l int) {
|
|
for _, v := range x.Values {
|
|
// if v.Primitive == "" && !(v.MapKey == "" && v.Elem == "uint8") {
|
|
if v.Primitive == "" {
|
|
l++
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
func genInternalZeroValue(s string) string {
|
|
switch s {
|
|
case "interface{}", "interface {}":
|
|
return "nil"
|
|
case "[]byte", "[]uint8", "bytes":
|
|
return "nil"
|
|
case "bool":
|
|
return "false"
|
|
case "string":
|
|
return `""`
|
|
default:
|
|
return "0"
|
|
}
|
|
}
|
|
|
|
var genInternalNonZeroValueIdx [6]uint64
|
|
var genInternalNonZeroValueStrs = [...][6]string{
|
|
{`"string-is-an-interface-1"`, "true", `"some-string-1"`, `[]byte("some-string-1")`, "11.1", "111"},
|
|
{`"string-is-an-interface-2"`, "false", `"some-string-2"`, `[]byte("some-string-2")`, "22.2", "77"},
|
|
{`"string-is-an-interface-3"`, "true", `"some-string-3"`, `[]byte("some-string-3")`, "33.3e3", "127"},
|
|
}
|
|
|
|
// Note: last numbers must be in range: 0-127 (as they may be put into a int8, uint8, etc)
|
|
|
|
func genInternalNonZeroValue(s string) string {
|
|
var i int
|
|
switch s {
|
|
case "interface{}", "interface {}":
|
|
i = 0
|
|
case "bool":
|
|
i = 1
|
|
case "string":
|
|
i = 2
|
|
case "bytes", "[]byte", "[]uint8":
|
|
i = 3
|
|
case "float32", "float64", "float", "double", "complex", "complex64", "complex128":
|
|
i = 4
|
|
default:
|
|
i = 5
|
|
}
|
|
genInternalNonZeroValueIdx[i]++
|
|
idx := genInternalNonZeroValueIdx[i]
|
|
slen := uint64(len(genInternalNonZeroValueStrs))
|
|
return genInternalNonZeroValueStrs[idx%slen][i] // return string, to remove ambiguity
|
|
}
|
|
|
|
// Note: used for fastpath only
|
|
func genInternalEncCommandAsString(s string, vname string) string {
|
|
switch s {
|
|
case "uint64":
|
|
return "e.e.EncodeUint(" + vname + ")"
|
|
case "uint", "uint8", "uint16", "uint32":
|
|
return "e.e.EncodeUint(uint64(" + vname + "))"
|
|
case "int64":
|
|
return "e.e.EncodeInt(" + vname + ")"
|
|
case "int", "int8", "int16", "int32":
|
|
return "e.e.EncodeInt(int64(" + vname + "))"
|
|
case "[]byte", "[]uint8", "bytes":
|
|
return "e.e.EncodeStringBytesRaw(" + vname + ")"
|
|
case "string":
|
|
return "e.e.EncodeString(" + vname + ")"
|
|
case "float32":
|
|
return "e.e.EncodeFloat32(" + vname + ")"
|
|
case "float64":
|
|
return "e.e.EncodeFloat64(" + vname + ")"
|
|
case "bool":
|
|
return "e.e.EncodeBool(" + vname + ")"
|
|
// case "symbol":
|
|
// return "e.e.EncodeSymbol(" + vname + ")"
|
|
default:
|
|
return "e.encode(" + vname + ")"
|
|
}
|
|
}
|
|
|
|
// Note: used for fastpath only
|
|
func genInternalDecCommandAsString(s string, mapkey bool) string {
|
|
switch s {
|
|
case "uint":
|
|
return "uint(chkOvf.UintV(d.d.DecodeUint64(), uintBitsize))"
|
|
case "uint8":
|
|
return "uint8(chkOvf.UintV(d.d.DecodeUint64(), 8))"
|
|
case "uint16":
|
|
return "uint16(chkOvf.UintV(d.d.DecodeUint64(), 16))"
|
|
case "uint32":
|
|
return "uint32(chkOvf.UintV(d.d.DecodeUint64(), 32))"
|
|
case "uint64":
|
|
return "d.d.DecodeUint64()"
|
|
case "uintptr":
|
|
return "uintptr(chkOvf.UintV(d.d.DecodeUint64(), uintBitsize))"
|
|
case "int":
|
|
return "int(chkOvf.IntV(d.d.DecodeInt64(), intBitsize))"
|
|
case "int8":
|
|
return "int8(chkOvf.IntV(d.d.DecodeInt64(), 8))"
|
|
case "int16":
|
|
return "int16(chkOvf.IntV(d.d.DecodeInt64(), 16))"
|
|
case "int32":
|
|
return "int32(chkOvf.IntV(d.d.DecodeInt64(), 32))"
|
|
case "int64":
|
|
return "d.d.DecodeInt64()"
|
|
|
|
case "string":
|
|
// if mapkey {
|
|
// return "d.stringZC(d.d.DecodeStringAsBytes())"
|
|
// }
|
|
// return "string(d.d.DecodeStringAsBytes())"
|
|
return "d.stringZC(d.d.DecodeStringAsBytes())"
|
|
case "[]byte", "[]uint8", "bytes":
|
|
return "d.d.DecodeBytes([]byte{})"
|
|
case "float32":
|
|
return "float32(d.decodeFloat32())"
|
|
case "float64":
|
|
return "d.d.DecodeFloat64()"
|
|
case "complex64":
|
|
return "complex(d.decodeFloat32(), 0)"
|
|
case "complex128":
|
|
return "complex(d.d.DecodeFloat64(), 0)"
|
|
case "bool":
|
|
return "d.d.DecodeBool()"
|
|
default:
|
|
halt.onerror(errors.New("gen internal: unknown type for decode: " + s))
|
|
}
|
|
return ""
|
|
}
|
|
|
|
// func genInternalSortType(s string, elem bool) string {
|
|
// for _, v := range [...]string{
|
|
// "int",
|
|
// "uint",
|
|
// "float",
|
|
// "bool",
|
|
// "string",
|
|
// "bytes", "[]uint8", "[]byte",
|
|
// } {
|
|
// if v == "[]byte" || v == "[]uint8" {
|
|
// v = "bytes"
|
|
// }
|
|
// if strings.HasPrefix(s, v) {
|
|
// if v == "int" || v == "uint" || v == "float" {
|
|
// v += "64"
|
|
// }
|
|
// if elem {
|
|
// return v
|
|
// }
|
|
// return v + "Slice"
|
|
// }
|
|
// }
|
|
// halt.onerror(errors.New("sorttype: unexpected type: " + s))
|
|
// }
|
|
|
|
func genInternalSortType(s string, elem bool) string {
|
|
if elem {
|
|
return s
|
|
}
|
|
return s + "Slice"
|
|
}
|
|
|
|
// MARKER: keep in sync with codecgen/gen.go
|
|
func genStripVendor(s string) string {
|
|
// HACK: Misbehaviour occurs in go 1.5. May have to re-visit this later.
|
|
// if s contains /vendor/ OR startsWith vendor/, then return everything after it.
|
|
const vendorStart = "vendor/"
|
|
const vendorInline = "/vendor/"
|
|
if i := strings.LastIndex(s, vendorInline); i >= 0 {
|
|
s = s[i+len(vendorInline):]
|
|
} else if strings.HasPrefix(s, vendorStart) {
|
|
s = s[len(vendorStart):]
|
|
}
|
|
return s
|
|
}
|
|
|
|
// var genInternalMu sync.Mutex
|
|
var genInternalV = genInternal{Version: genVersion}
|
|
var genInternalTmplFuncs template.FuncMap
|
|
var genInternalOnce sync.Once
|
|
|
|
func genInternalInit() {
|
|
wordSizeBytes := int(intBitsize) / 8
|
|
|
|
typesizes := map[string]int{
|
|
"interface{}": 2 * wordSizeBytes,
|
|
"string": 2 * wordSizeBytes,
|
|
"[]byte": 3 * wordSizeBytes,
|
|
"uint": 1 * wordSizeBytes,
|
|
"uint8": 1,
|
|
"uint16": 2,
|
|
"uint32": 4,
|
|
"uint64": 8,
|
|
"uintptr": 1 * wordSizeBytes,
|
|
"int": 1 * wordSizeBytes,
|
|
"int8": 1,
|
|
"int16": 2,
|
|
"int32": 4,
|
|
"int64": 8,
|
|
"float32": 4,
|
|
"float64": 8,
|
|
"complex64": 8,
|
|
"complex128": 16,
|
|
"bool": 1,
|
|
}
|
|
|
|
// keep as slice, so it is in specific iteration order.
|
|
// Initial order was uint64, string, interface{}, int, int64, ...
|
|
|
|
var types = [...]string{
|
|
"interface{}",
|
|
"string",
|
|
"[]byte",
|
|
"float32",
|
|
"float64",
|
|
"uint",
|
|
"uint8",
|
|
"uint16",
|
|
"uint32",
|
|
"uint64",
|
|
"uintptr",
|
|
"int",
|
|
"int8",
|
|
"int16",
|
|
"int32",
|
|
"int64",
|
|
"bool",
|
|
}
|
|
|
|
var primitivetypes, slicetypes, mapkeytypes, mapvaltypes []string
|
|
|
|
primitivetypes = types[:]
|
|
slicetypes = types[:]
|
|
mapkeytypes = types[:]
|
|
mapvaltypes = types[:]
|
|
|
|
if genFastpathTrimTypes {
|
|
// Note: we only create fast-paths for commonly used types.
|
|
// Consequently, things like int8, uint16, uint, etc are commented out.
|
|
|
|
slicetypes = genInternalFastpathSliceTypes()
|
|
mapkeytypes = genInternalFastpathMapKeyTypes()
|
|
mapvaltypes = genInternalFastpathMapValueTypes()
|
|
}
|
|
|
|
// var mapkeytypes [len(&types) - 1]string // skip bool
|
|
// copy(mapkeytypes[:], types[:])
|
|
|
|
// var mb []byte
|
|
// mb = append(mb, '|')
|
|
// for _, s := range mapkeytypes {
|
|
// mb = append(mb, s...)
|
|
// mb = append(mb, '|')
|
|
// }
|
|
// var mapkeytypestr = string(mb)
|
|
|
|
var gt = genInternal{Version: genVersion, Formats: genFormats}
|
|
|
|
// For each slice or map type, there must be a (symmetrical) Encode and Decode fast-path function
|
|
|
|
for _, s := range primitivetypes {
|
|
gt.Values = append(gt.Values,
|
|
fastpathGenV{Primitive: s, Size: typesizes[s], NoCanonical: !genFastpathCanonical})
|
|
}
|
|
for _, s := range slicetypes {
|
|
// if s != "uint8" { // do not generate fast path for slice of bytes. Treat specially already.
|
|
// gt.Values = append(gt.Values, fastpathGenV{Elem: s, Size: typesizes[s]})
|
|
// }
|
|
gt.Values = append(gt.Values,
|
|
fastpathGenV{Elem: s, Size: typesizes[s], NoCanonical: !genFastpathCanonical})
|
|
}
|
|
for _, s := range mapkeytypes {
|
|
// if _, ok := typesizes[s]; !ok {
|
|
// if strings.Contains(mapkeytypestr, "|"+s+"|") {
|
|
// gt.Values = append(gt.Values, fastpathGenV{MapKey: s, Elem: s, Size: 2 * typesizes[s]})
|
|
// }
|
|
for _, ms := range mapvaltypes {
|
|
gt.Values = append(gt.Values,
|
|
fastpathGenV{MapKey: s, Elem: ms, Size: typesizes[s] + typesizes[ms], NoCanonical: !genFastpathCanonical})
|
|
}
|
|
}
|
|
|
|
funcs := make(template.FuncMap)
|
|
// funcs["haspfx"] = strings.HasPrefix
|
|
funcs["encmd"] = genInternalEncCommandAsString
|
|
funcs["decmd"] = genInternalDecCommandAsString
|
|
funcs["zerocmd"] = genInternalZeroValue
|
|
funcs["nonzerocmd"] = genInternalNonZeroValue
|
|
funcs["hasprefix"] = strings.HasPrefix
|
|
funcs["sorttype"] = genInternalSortType
|
|
|
|
genInternalV = gt
|
|
genInternalTmplFuncs = funcs
|
|
}
|
|
|
|
// genInternalGoFile is used to generate source files from templates.
|
|
func genInternalGoFile(r io.Reader, w io.Writer) (err error) {
|
|
genInternalOnce.Do(genInternalInit)
|
|
|
|
gt := genInternalV
|
|
|
|
t := template.New("").Funcs(genInternalTmplFuncs)
|
|
|
|
tmplstr, err := ioutil.ReadAll(r)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
if t, err = t.Parse(string(tmplstr)); err != nil {
|
|
return
|
|
}
|
|
|
|
var out bytes.Buffer
|
|
err = t.Execute(&out, gt)
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
bout, err := format.Source(out.Bytes())
|
|
if err != nil {
|
|
w.Write(out.Bytes()) // write out if error, so we can still see.
|
|
// w.Write(bout) // write out if error, as much as possible, so we can still see.
|
|
return
|
|
}
|
|
w.Write(bout)
|
|
return
|
|
}
|
|
|
|
func genInternalFastpathSliceTypes() []string {
|
|
return []string{
|
|
"interface{}",
|
|
"string",
|
|
"[]byte",
|
|
"float32",
|
|
"float64",
|
|
// "uint",
|
|
// "uint8", // no need for fastpath of []uint8, as it is handled specially
|
|
"uint8", // keep fast-path, so it doesn't have to go through reflection
|
|
// "uint16",
|
|
// "uint32",
|
|
"uint64",
|
|
// "uintptr",
|
|
"int",
|
|
// "int8",
|
|
// "int16",
|
|
"int32", // rune
|
|
"int64",
|
|
"bool",
|
|
}
|
|
}
|
|
|
|
func genInternalFastpathMapKeyTypes() []string {
|
|
return []string{
|
|
// "interface{}",
|
|
"string",
|
|
// "[]byte",
|
|
// "float32",
|
|
// "float64",
|
|
// "uint",
|
|
"uint8", // byte
|
|
// "uint16",
|
|
// "uint32",
|
|
"uint64", // used for keys
|
|
// "uintptr",
|
|
"int", // default number key
|
|
// "int8",
|
|
// "int16",
|
|
"int32", // rune
|
|
// "int64",
|
|
// "bool",
|
|
}
|
|
}
|
|
|
|
func genInternalFastpathMapValueTypes() []string {
|
|
return []string{
|
|
"interface{}",
|
|
"string",
|
|
"[]byte",
|
|
// "uint",
|
|
"uint8", // byte
|
|
// "uint16",
|
|
// "uint32",
|
|
"uint64", // used for keys, etc
|
|
// "uintptr",
|
|
"int", // default number
|
|
//"int8",
|
|
// "int16",
|
|
"int32", // rune (mostly used for unicode)
|
|
// "int64",
|
|
// "float32",
|
|
"float64",
|
|
"bool",
|
|
}
|
|
}
|
|
|
|
// sort-slice ...
|
|
// generates sort implementations for
|
|
// various slice types and combination slice+reflect.Value types.
|
|
//
|
|
// The combination slice+reflect.Value types are used
|
|
// during canonical encode, and the others are used during fast-path
|
|
// encoding of map keys.
|
|
|
|
// genInternalSortableTypes returns the types
|
|
// that are used for fast-path canonical's encoding of maps.
|
|
//
|
|
// For now, we only support the highest sizes for
|
|
// int64, uint64, float64, bool, string, bytes.
|
|
func genInternalSortableTypes() []string {
|
|
return genInternalFastpathMapKeyTypes()
|
|
}
|
|
|
|
// genInternalSortablePlusTypes returns the types
|
|
// that are used for reflection-based canonical's encoding of maps.
|
|
//
|
|
// For now, we only support the highest sizes for
|
|
// int64, uint64, float64, bool, string, bytes.
|
|
func genInternalSortablePlusTypes() []string {
|
|
return []string{
|
|
"string",
|
|
"float64",
|
|
"uint64",
|
|
// "uintptr",
|
|
"int64",
|
|
"bool",
|
|
"time",
|
|
"bytes",
|
|
}
|
|
}
|
|
|
|
func genTypeForShortName(s string) string {
|
|
switch s {
|
|
case "time":
|
|
return "time.Time"
|
|
case "bytes":
|
|
return "[]byte"
|
|
}
|
|
return s
|
|
}
|
|
|
|
func genArgs(args ...interface{}) map[string]interface{} {
|
|
m := make(map[string]interface{}, len(args)/2)
|
|
for i := 0; i < len(args); {
|
|
m[args[i].(string)] = args[i+1]
|
|
i += 2
|
|
}
|
|
return m
|
|
}
|
|
|
|
func genEndsWith(s0 string, sn ...string) bool {
|
|
for _, s := range sn {
|
|
if strings.HasSuffix(s0, s) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func genCheckErr(err error) {
|
|
halt.onerror(err)
|
|
}
|
|
|
|
func genRunSortTmpl2Go(fnameIn, fnameOut string) {
|
|
var err error
|
|
|
|
funcs := make(template.FuncMap)
|
|
funcs["sortables"] = genInternalSortableTypes
|
|
funcs["sortablesplus"] = genInternalSortablePlusTypes
|
|
funcs["tshort"] = genTypeForShortName
|
|
funcs["endswith"] = genEndsWith
|
|
funcs["args"] = genArgs
|
|
|
|
t := template.New("").Funcs(funcs)
|
|
fin, err := os.Open(fnameIn)
|
|
genCheckErr(err)
|
|
defer fin.Close()
|
|
fout, err := os.Create(fnameOut)
|
|
genCheckErr(err)
|
|
defer fout.Close()
|
|
tmplstr, err := ioutil.ReadAll(fin)
|
|
genCheckErr(err)
|
|
t, err = t.Parse(string(tmplstr))
|
|
genCheckErr(err)
|
|
var out bytes.Buffer
|
|
err = t.Execute(&out, 0)
|
|
genCheckErr(err)
|
|
bout, err := format.Source(out.Bytes())
|
|
if err != nil {
|
|
fout.Write(out.Bytes()) // write out if error, so we can still see.
|
|
}
|
|
genCheckErr(err)
|
|
// write out if error, as much as possible, so we can still see.
|
|
_, err = fout.Write(bout)
|
|
genCheckErr(err)
|
|
}
|
|
|
|
func genRunTmpl2Go(fnameIn, fnameOut string) {
|
|
// println("____ " + fnameIn + " --> " + fnameOut + " ______")
|
|
fin, err := os.Open(fnameIn)
|
|
genCheckErr(err)
|
|
defer fin.Close()
|
|
fout, err := os.Create(fnameOut)
|
|
genCheckErr(err)
|
|
defer fout.Close()
|
|
err = genInternalGoFile(fin, fout)
|
|
genCheckErr(err)
|
|
}
|
|
|
|
// --- some methods here for other types, which are only used in codecgen
|
|
|
|
// depth returns number of valid nodes in the hierachy
|
|
func (path *structFieldInfoPathNode) root() *structFieldInfoPathNode {
|
|
TOP:
|
|
if path.parent != nil {
|
|
path = path.parent
|
|
goto TOP
|
|
}
|
|
return path
|
|
}
|
|
|
|
func (path *structFieldInfoPathNode) fullpath() (p []*structFieldInfoPathNode) {
|
|
// this method is mostly called by a command-line tool - it's not optimized, and that's ok.
|
|
// it shouldn't be used in typical runtime use - as it does unnecessary allocation.
|
|
d := path.depth()
|
|
p = make([]*structFieldInfoPathNode, d)
|
|
for d--; d >= 0; d-- {
|
|
p[d] = path
|
|
path = path.parent
|
|
}
|
|
return
|
|
}
|