mirror of https://github.com/goccy/go-json.git
648 lines
16 KiB
Go
648 lines
16 KiB
Go
package encoder
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import (
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"fmt"
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"math"
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"strings"
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"unsafe"
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"github.com/goccy/go-json/internal/runtime"
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)
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const uintptrSize = 4 << (^uintptr(0) >> 63)
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type Opcode struct {
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Op OpType // operation type
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Type *runtime.Type // go type
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DisplayIdx int // opcode index
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Key []byte // struct field key
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EscapedKey []byte // struct field key ( HTML escaped )
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PtrNum int // pointer number: e.g. double pointer is 2.
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DisplayKey string // key text to display
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IsTaggedKey bool // whether tagged key
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AnonymousKey bool // whether anonymous key
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AnonymousHead bool // whether anonymous head or not
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Indirect bool // whether indirect or not
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Nilcheck bool // whether needs to nilcheck or not
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AddrForMarshaler bool // whether needs to addr for marshaler or not
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RshiftNum uint8 // use to take bit for judging whether negative integer or not
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Mask uint64 // mask for number
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Indent int // indent number
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Idx uintptr // offset to access ptr
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HeadIdx uintptr // offset to access slice/struct head
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ElemIdx uintptr // offset to access array/slice/map elem
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Length uintptr // offset to access slice/map length or array length
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MapIter uintptr // offset to access map iterator
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MapPos uintptr // offset to access position list for sorted map
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Offset uintptr // offset size from struct header
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Size uintptr // array/slice elem size
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MapKey *Opcode // map key
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MapValue *Opcode // map value
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Elem *Opcode // array/slice elem
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End *Opcode // array/slice/struct/map end
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PrevField *Opcode // prev struct field
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NextField *Opcode // next struct field
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Next *Opcode // next opcode
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Jmp *CompiledCode // for recursive call
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}
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func rshitNum(bitSize uint8) uint8 {
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return bitSize - 1
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}
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func (c *Opcode) setMaskAndRshiftNum(bitSize uint8) {
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switch bitSize {
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case 8:
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c.Mask = math.MaxUint8
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case 16:
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c.Mask = math.MaxUint16
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case 32:
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c.Mask = math.MaxUint32
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case 64:
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c.Mask = math.MaxUint64
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}
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c.RshiftNum = rshitNum(bitSize)
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}
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func (c *Opcode) ToHeaderType() OpType {
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switch c.Op {
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case OpInt:
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return OpStructHeadInt
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case OpIntPtr:
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return OpStructHeadIntPtr
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case OpUint:
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return OpStructHeadUint
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case OpUintPtr:
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return OpStructHeadUintPtr
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case OpFloat32:
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return OpStructHeadFloat32
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case OpFloat32Ptr:
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return OpStructHeadFloat32Ptr
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case OpFloat64:
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return OpStructHeadFloat64
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case OpFloat64Ptr:
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return OpStructHeadFloat64Ptr
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case OpString:
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return OpStructHeadString
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case OpStringPtr:
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return OpStructHeadStringPtr
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case OpNumber:
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return OpStructHeadNumber
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case OpNumberPtr:
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return OpStructHeadNumberPtr
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case OpBool:
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return OpStructHeadBool
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case OpBoolPtr:
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return OpStructHeadBoolPtr
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case OpMap:
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return OpStructHeadMap
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case OpMapPtr:
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c.Op = OpMap
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return OpStructHeadMapPtr
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case OpArray:
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return OpStructHeadArray
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case OpArrayPtr:
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c.Op = OpArray
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return OpStructHeadArrayPtr
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case OpSlice:
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return OpStructHeadSlice
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case OpSlicePtr:
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c.Op = OpSlice
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return OpStructHeadSlicePtr
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case OpMarshalJSON:
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return OpStructHeadMarshalJSON
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case OpMarshalJSONPtr:
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return OpStructHeadMarshalJSONPtr
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case OpMarshalText:
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return OpStructHeadMarshalText
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case OpMarshalTextPtr:
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return OpStructHeadMarshalTextPtr
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}
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return OpStructHead
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}
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func (c *Opcode) ToFieldType() OpType {
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switch c.Op {
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case OpInt:
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return OpStructFieldInt
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case OpIntPtr:
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return OpStructFieldIntPtr
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case OpUint:
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return OpStructFieldUint
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case OpUintPtr:
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return OpStructFieldUintPtr
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case OpFloat32:
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return OpStructFieldFloat32
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case OpFloat32Ptr:
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return OpStructFieldFloat32Ptr
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case OpFloat64:
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return OpStructFieldFloat64
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case OpFloat64Ptr:
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return OpStructFieldFloat64Ptr
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case OpString:
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return OpStructFieldString
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case OpStringPtr:
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return OpStructFieldStringPtr
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case OpNumber:
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return OpStructFieldNumber
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case OpNumberPtr:
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return OpStructFieldNumberPtr
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case OpBool:
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return OpStructFieldBool
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case OpBoolPtr:
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return OpStructFieldBoolPtr
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case OpMap:
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return OpStructFieldMap
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case OpMapPtr:
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c.Op = OpMap
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return OpStructFieldMapPtr
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case OpArray:
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return OpStructFieldArray
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case OpArrayPtr:
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c.Op = OpArray
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return OpStructFieldArrayPtr
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case OpSlice:
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return OpStructFieldSlice
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case OpSlicePtr:
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c.Op = OpSlice
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return OpStructFieldSlicePtr
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case OpMarshalJSON:
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return OpStructFieldMarshalJSON
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case OpMarshalJSONPtr:
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return OpStructFieldMarshalJSONPtr
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case OpMarshalText:
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return OpStructFieldMarshalText
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case OpMarshalTextPtr:
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return OpStructFieldMarshalTextPtr
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}
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return OpStructField
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}
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func newOpCode(ctx *compileContext, op OpType) *Opcode {
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return newOpCodeWithNext(ctx, op, newEndOp(ctx))
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}
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func opcodeOffset(idx int) uintptr {
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return uintptr(idx) * uintptrSize
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}
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func copyOpcode(code *Opcode) *Opcode {
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codeMap := map[uintptr]*Opcode{}
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return code.copy(codeMap)
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}
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func newOpCodeWithNext(ctx *compileContext, op OpType, next *Opcode) *Opcode {
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return &Opcode{
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Op: op,
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Type: ctx.typ,
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DisplayIdx: ctx.opcodeIndex,
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Indent: ctx.indent,
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Idx: opcodeOffset(ctx.ptrIndex),
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Next: next,
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}
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}
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func newEndOp(ctx *compileContext) *Opcode {
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return newOpCodeWithNext(ctx, OpEnd, nil)
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}
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func (c *Opcode) copy(codeMap map[uintptr]*Opcode) *Opcode {
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if c == nil {
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return nil
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}
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addr := uintptr(unsafe.Pointer(c))
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if code, exists := codeMap[addr]; exists {
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return code
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}
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copied := &Opcode{
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Op: c.Op,
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Type: c.Type,
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DisplayIdx: c.DisplayIdx,
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Key: c.Key,
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EscapedKey: c.EscapedKey,
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DisplayKey: c.DisplayKey,
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PtrNum: c.PtrNum,
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Mask: c.Mask,
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RshiftNum: c.RshiftNum,
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IsTaggedKey: c.IsTaggedKey,
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AnonymousKey: c.AnonymousKey,
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AnonymousHead: c.AnonymousHead,
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Indirect: c.Indirect,
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Nilcheck: c.Nilcheck,
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AddrForMarshaler: c.AddrForMarshaler,
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Indent: c.Indent,
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Idx: c.Idx,
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HeadIdx: c.HeadIdx,
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ElemIdx: c.ElemIdx,
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Length: c.Length,
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MapIter: c.MapIter,
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MapPos: c.MapPos,
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Offset: c.Offset,
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Size: c.Size,
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}
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codeMap[addr] = copied
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copied.MapKey = c.MapKey.copy(codeMap)
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copied.MapValue = c.MapValue.copy(codeMap)
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copied.Elem = c.Elem.copy(codeMap)
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copied.End = c.End.copy(codeMap)
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copied.PrevField = c.PrevField.copy(codeMap)
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copied.NextField = c.NextField.copy(codeMap)
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copied.Next = c.Next.copy(codeMap)
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copied.Jmp = c.Jmp
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return copied
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}
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func (c *Opcode) BeforeLastCode() *Opcode {
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code := c
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for {
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var nextCode *Opcode
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switch code.Op.CodeType() {
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case CodeArrayElem, CodeSliceElem, CodeMapKey:
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nextCode = code.End
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default:
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nextCode = code.Next
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}
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if nextCode.Op == OpEnd {
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return code
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}
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code = nextCode
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}
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}
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func (c *Opcode) TotalLength() int {
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var idx int
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for code := c; code.Op != OpEnd; {
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idx = int(code.Idx / uintptrSize)
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if code.Op == OpStructFieldRecursiveEnd {
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break
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}
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switch code.Op.CodeType() {
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case CodeArrayElem, CodeSliceElem, CodeMapKey:
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code = code.End
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default:
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code = code.Next
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}
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}
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return idx + 2 // opEnd + 1
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}
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func (c *Opcode) decOpcodeIndex() {
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for code := c; code.Op != OpEnd; {
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code.DisplayIdx--
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code.Idx -= uintptrSize
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if code.HeadIdx > 0 {
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code.HeadIdx -= uintptrSize
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}
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if code.ElemIdx > 0 {
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code.ElemIdx -= uintptrSize
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}
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if code.MapIter > 0 {
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code.MapIter -= uintptrSize
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}
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if code.Length > 0 && code.Op.CodeType() != CodeArrayHead && code.Op.CodeType() != CodeArrayElem {
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code.Length -= uintptrSize
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}
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switch code.Op.CodeType() {
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case CodeArrayElem, CodeSliceElem, CodeMapKey:
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code = code.End
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default:
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code = code.Next
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}
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}
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}
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func (c *Opcode) decIndent() {
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for code := c; code.Op != OpEnd; {
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code.Indent--
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switch code.Op.CodeType() {
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case CodeArrayElem, CodeSliceElem, CodeMapKey:
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code = code.End
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default:
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code = code.Next
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}
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}
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}
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func (c *Opcode) dumpHead(code *Opcode) string {
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var length uintptr
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if code.Op.CodeType() == CodeArrayHead {
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length = code.Length
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} else {
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length = code.Length / uintptrSize
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}
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return fmt.Sprintf(
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`[%d]%s%s ([idx:%d][headIdx:%d][elemIdx:%d][length:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", code.Indent),
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code.Op,
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code.Idx/uintptrSize,
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code.HeadIdx/uintptrSize,
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code.ElemIdx/uintptrSize,
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length,
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)
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}
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func (c *Opcode) dumpMapHead(code *Opcode) string {
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return fmt.Sprintf(
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`[%d]%s%s ([idx:%d][headIdx:%d][elemIdx:%d][length:%d][mapIter:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", code.Indent),
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code.Op,
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code.Idx/uintptrSize,
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code.HeadIdx/uintptrSize,
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code.ElemIdx/uintptrSize,
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code.Length/uintptrSize,
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code.MapIter/uintptrSize,
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)
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}
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func (c *Opcode) dumpMapEnd(code *Opcode) string {
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return fmt.Sprintf(
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`[%d]%s%s ([idx:%d][mapPos:%d][length:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", code.Indent),
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code.Op,
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code.Idx/uintptrSize,
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code.MapPos/uintptrSize,
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code.Length/uintptrSize,
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)
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}
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func (c *Opcode) dumpElem(code *Opcode) string {
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var length uintptr
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if code.Op.CodeType() == CodeArrayElem {
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length = code.Length
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} else {
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length = code.Length / uintptrSize
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}
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return fmt.Sprintf(
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`[%d]%s%s ([idx:%d][headIdx:%d][elemIdx:%d][length:%d][size:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", code.Indent),
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code.Op,
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code.Idx/uintptrSize,
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code.HeadIdx/uintptrSize,
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code.ElemIdx/uintptrSize,
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length,
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code.Size,
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)
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}
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func (c *Opcode) dumpField(code *Opcode) string {
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return fmt.Sprintf(
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`[%d]%s%s ([idx:%d][key:%s][offset:%d][headIdx:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", code.Indent),
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code.Op,
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code.Idx/uintptrSize,
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code.DisplayKey,
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code.Offset,
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code.HeadIdx/uintptrSize,
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)
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}
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func (c *Opcode) dumpKey(code *Opcode) string {
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return fmt.Sprintf(
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`[%d]%s%s ([idx:%d][elemIdx:%d][length:%d][mapIter:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", code.Indent),
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code.Op,
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code.Idx/uintptrSize,
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code.ElemIdx/uintptrSize,
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code.Length/uintptrSize,
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code.MapIter/uintptrSize,
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)
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}
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func (c *Opcode) dumpValue(code *Opcode) string {
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return fmt.Sprintf(
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`[%d]%s%s ([idx:%d][mapIter:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", code.Indent),
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code.Op,
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code.Idx/uintptrSize,
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code.MapIter/uintptrSize,
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)
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}
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func (c *Opcode) Dump() string {
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codes := []string{}
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for code := c; code.Op != OpEnd; {
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switch code.Op.CodeType() {
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case CodeSliceHead:
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codes = append(codes, c.dumpHead(code))
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code = code.Next
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case CodeMapHead:
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codes = append(codes, c.dumpMapHead(code))
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code = code.Next
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case CodeArrayElem, CodeSliceElem:
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codes = append(codes, c.dumpElem(code))
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code = code.End
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case CodeMapKey:
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codes = append(codes, c.dumpKey(code))
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code = code.End
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case CodeMapValue:
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codes = append(codes, c.dumpValue(code))
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code = code.Next
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case CodeMapEnd:
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codes = append(codes, c.dumpMapEnd(code))
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code = code.Next
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case CodeStructField:
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codes = append(codes, c.dumpField(code))
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code = code.Next
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case CodeStructEnd:
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codes = append(codes, c.dumpField(code))
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code = code.Next
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default:
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codes = append(codes, fmt.Sprintf(
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"[%d]%s%s ([idx:%d])",
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code.DisplayIdx,
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strings.Repeat("-", code.Indent),
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code.Op,
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code.Idx/uintptrSize,
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))
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code = code.Next
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}
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}
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return strings.Join(codes, "\n")
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}
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func prevField(code *Opcode, removedFields map[*Opcode]struct{}) *Opcode {
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if _, exists := removedFields[code]; exists {
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return prevField(code.PrevField, removedFields)
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}
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return code
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}
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func nextField(code *Opcode, removedFields map[*Opcode]struct{}) *Opcode {
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if _, exists := removedFields[code]; exists {
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return nextField(code.NextField, removedFields)
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}
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return code
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}
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func linkPrevToNextField(cur *Opcode, removedFields map[*Opcode]struct{}) {
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prev := prevField(cur.PrevField, removedFields)
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prev.NextField = nextField(cur.NextField, removedFields)
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code := prev
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fcode := cur
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for {
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var nextCode *Opcode
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switch code.Op.CodeType() {
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case CodeArrayElem, CodeSliceElem, CodeMapKey:
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nextCode = code.End
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default:
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nextCode = code.Next
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}
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if nextCode == fcode {
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code.Next = fcode.Next
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break
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} else if nextCode.Op == OpEnd {
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break
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}
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code = nextCode
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}
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}
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func newSliceHeaderCode(ctx *compileContext) *Opcode {
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idx := opcodeOffset(ctx.ptrIndex)
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ctx.incPtrIndex()
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elemIdx := opcodeOffset(ctx.ptrIndex)
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ctx.incPtrIndex()
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length := opcodeOffset(ctx.ptrIndex)
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return &Opcode{
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Op: OpSlice,
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DisplayIdx: ctx.opcodeIndex,
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Idx: idx,
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HeadIdx: idx,
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ElemIdx: elemIdx,
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Length: length,
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Indent: ctx.indent,
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}
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}
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func newSliceElemCode(ctx *compileContext, head *Opcode, size uintptr) *Opcode {
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return &Opcode{
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Op: OpSliceElem,
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DisplayIdx: ctx.opcodeIndex,
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Idx: opcodeOffset(ctx.ptrIndex),
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HeadIdx: head.Idx,
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ElemIdx: head.ElemIdx,
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Length: head.Length,
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Indent: ctx.indent,
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Size: size,
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}
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}
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func newArrayHeaderCode(ctx *compileContext, alen int) *Opcode {
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idx := opcodeOffset(ctx.ptrIndex)
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ctx.incPtrIndex()
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elemIdx := opcodeOffset(ctx.ptrIndex)
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return &Opcode{
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Op: OpArray,
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DisplayIdx: ctx.opcodeIndex,
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Idx: idx,
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HeadIdx: idx,
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ElemIdx: elemIdx,
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Indent: ctx.indent,
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Length: uintptr(alen),
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}
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}
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func newArrayElemCode(ctx *compileContext, head *Opcode, length int, size uintptr) *Opcode {
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return &Opcode{
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Op: OpArrayElem,
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DisplayIdx: ctx.opcodeIndex,
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Idx: opcodeOffset(ctx.ptrIndex),
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ElemIdx: head.ElemIdx,
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HeadIdx: head.HeadIdx,
|
|
Length: uintptr(length),
|
|
Indent: ctx.indent,
|
|
Size: size,
|
|
}
|
|
}
|
|
|
|
func newMapHeaderCode(ctx *compileContext) *Opcode {
|
|
idx := opcodeOffset(ctx.ptrIndex)
|
|
ctx.incPtrIndex()
|
|
elemIdx := opcodeOffset(ctx.ptrIndex)
|
|
ctx.incPtrIndex()
|
|
length := opcodeOffset(ctx.ptrIndex)
|
|
ctx.incPtrIndex()
|
|
mapIter := opcodeOffset(ctx.ptrIndex)
|
|
return &Opcode{
|
|
Op: OpMap,
|
|
Type: ctx.typ,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Idx: idx,
|
|
ElemIdx: elemIdx,
|
|
Length: length,
|
|
MapIter: mapIter,
|
|
Indent: ctx.indent,
|
|
}
|
|
}
|
|
|
|
func newMapKeyCode(ctx *compileContext, head *Opcode) *Opcode {
|
|
return &Opcode{
|
|
Op: OpMapKey,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Idx: opcodeOffset(ctx.ptrIndex),
|
|
ElemIdx: head.ElemIdx,
|
|
Length: head.Length,
|
|
MapIter: head.MapIter,
|
|
Indent: ctx.indent,
|
|
}
|
|
}
|
|
|
|
func newMapValueCode(ctx *compileContext, head *Opcode) *Opcode {
|
|
return &Opcode{
|
|
Op: OpMapValue,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Idx: opcodeOffset(ctx.ptrIndex),
|
|
ElemIdx: head.ElemIdx,
|
|
Length: head.Length,
|
|
MapIter: head.MapIter,
|
|
Indent: ctx.indent,
|
|
}
|
|
}
|
|
|
|
func newMapEndCode(ctx *compileContext, head *Opcode) *Opcode {
|
|
mapPos := opcodeOffset(ctx.ptrIndex)
|
|
ctx.incPtrIndex()
|
|
idx := opcodeOffset(ctx.ptrIndex)
|
|
return &Opcode{
|
|
Op: OpMapEnd,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Idx: idx,
|
|
Length: head.Length,
|
|
MapPos: mapPos,
|
|
Indent: ctx.indent,
|
|
Next: newEndOp(ctx),
|
|
}
|
|
}
|
|
|
|
func newInterfaceCode(ctx *compileContext) *Opcode {
|
|
return &Opcode{
|
|
Op: OpInterface,
|
|
Type: ctx.typ,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Idx: opcodeOffset(ctx.ptrIndex),
|
|
Indent: ctx.indent,
|
|
Next: newEndOp(ctx),
|
|
}
|
|
}
|
|
|
|
func newRecursiveCode(ctx *compileContext, jmp *CompiledCode) *Opcode {
|
|
return &Opcode{
|
|
Op: OpStructFieldRecursive,
|
|
Type: ctx.typ,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Idx: opcodeOffset(ctx.ptrIndex),
|
|
Indent: ctx.indent,
|
|
Next: newEndOp(ctx),
|
|
Jmp: jmp,
|
|
}
|
|
}
|