753 lines
16 KiB
Go
753 lines
16 KiB
Go
package encoder
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import (
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"bytes"
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"fmt"
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"sort"
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"strings"
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"unsafe"
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"git.gammaspectra.live/P2Pool/go-json/internal/runtime"
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)
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const uintptrSize = 4 << (^uintptr(0) >> 63)
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type OpFlags uint16
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const (
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AnonymousHeadFlags OpFlags = 1 << 0
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AnonymousKeyFlags OpFlags = 1 << 1
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IndirectFlags OpFlags = 1 << 2
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IsTaggedKeyFlags OpFlags = 1 << 3
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NilCheckFlags OpFlags = 1 << 4
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AddrForMarshalerFlags OpFlags = 1 << 5
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IsNextOpPtrTypeFlags OpFlags = 1 << 6
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IsNilableTypeFlags OpFlags = 1 << 7
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MarshalerContextFlags OpFlags = 1 << 8
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NonEmptyInterfaceFlags OpFlags = 1 << 9
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)
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type Opcode struct {
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Op OpType // operation type
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Idx uint32 // offset to access ptr
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Next *Opcode // next opcode
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End *Opcode // array/slice/struct/map end
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NextField *Opcode // next struct field
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Key string // struct field key
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Offset uint32 // offset size from struct header
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PtrNum uint8 // pointer number: e.g. double pointer is 2.
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NumBitSize uint8
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Flags OpFlags
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Type *runtime.Type // go type
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Jmp *CompiledCode // for recursive call
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FieldQuery *FieldQuery // field query for Interface / MarshalJSON / MarshalText
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ElemIdx uint32 // offset to access array/slice elem
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Length uint32 // offset to access slice length or array length
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Indent uint32 // indent number
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Size uint32 // array/slice elem size
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DisplayIdx uint32 // opcode index
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DisplayKey string // key text to display
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}
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func (c *Opcode) Validate() error {
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var prevIdx uint32
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for code := c; !code.IsEnd(); {
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if prevIdx != 0 {
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if code.DisplayIdx != prevIdx+1 {
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return fmt.Errorf(
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"invalid index. previous display index is %d but next is %d. dump = %s",
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prevIdx, code.DisplayIdx, c.Dump(),
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)
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}
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}
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prevIdx = code.DisplayIdx
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code = code.IterNext()
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}
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return nil
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}
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func (c *Opcode) IterNext() *Opcode {
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if c == nil {
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return nil
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}
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switch c.Op.CodeType() {
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case CodeArrayElem, CodeSliceElem, CodeMapKey:
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return c.End
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default:
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return c.Next
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}
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}
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func (c *Opcode) IsEnd() bool {
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if c == nil {
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return true
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}
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return c.Op == OpEnd || c.Op == OpInterfaceEnd || c.Op == OpRecursiveEnd
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}
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func (c *Opcode) MaxIdx() uint32 {
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max := uint32(0)
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for _, value := range []uint32{
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c.Idx,
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c.ElemIdx,
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c.Length,
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c.Size,
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} {
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if max < value {
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max = value
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}
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}
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return max
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}
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func (c *Opcode) ToHeaderType(isString bool) OpType {
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switch c.Op {
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case OpInt:
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if isString {
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return OpStructHeadIntString
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}
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return OpStructHeadInt
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case OpIntPtr:
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if isString {
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return OpStructHeadIntPtrString
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}
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return OpStructHeadIntPtr
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case OpUint:
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if isString {
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return OpStructHeadUintString
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}
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return OpStructHeadUint
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case OpUintPtr:
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if isString {
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return OpStructHeadUintPtrString
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}
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return OpStructHeadUintPtr
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case OpFloat32:
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if isString {
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return OpStructHeadFloat32String
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}
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return OpStructHeadFloat32
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case OpFloat32Ptr:
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if isString {
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return OpStructHeadFloat32PtrString
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}
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return OpStructHeadFloat32Ptr
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case OpFloat64:
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if isString {
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return OpStructHeadFloat64String
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}
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return OpStructHeadFloat64
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case OpFloat64Ptr:
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if isString {
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return OpStructHeadFloat64PtrString
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}
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return OpStructHeadFloat64Ptr
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case OpString:
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if isString {
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return OpStructHeadStringString
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}
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return OpStructHeadString
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case OpStringPtr:
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if isString {
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return OpStructHeadStringPtrString
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}
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return OpStructHeadStringPtr
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case OpNumber:
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if isString {
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return OpStructHeadNumberString
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}
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return OpStructHeadNumber
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case OpNumberPtr:
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if isString {
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return OpStructHeadNumberPtrString
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}
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return OpStructHeadNumberPtr
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case OpBool:
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if isString {
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return OpStructHeadBoolString
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}
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return OpStructHeadBool
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case OpBoolPtr:
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if isString {
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return OpStructHeadBoolPtrString
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}
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return OpStructHeadBoolPtr
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case OpBytes:
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return OpStructHeadBytes
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case OpBytesPtr:
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return OpStructHeadBytesPtr
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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(isString bool) OpType {
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switch c.Op {
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case OpInt:
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if isString {
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return OpStructFieldIntString
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}
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return OpStructFieldInt
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case OpIntPtr:
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if isString {
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return OpStructFieldIntPtrString
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}
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return OpStructFieldIntPtr
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case OpUint:
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if isString {
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return OpStructFieldUintString
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}
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return OpStructFieldUint
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case OpUintPtr:
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if isString {
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return OpStructFieldUintPtrString
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}
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return OpStructFieldUintPtr
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case OpFloat32:
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if isString {
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return OpStructFieldFloat32String
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}
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return OpStructFieldFloat32
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case OpFloat32Ptr:
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if isString {
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return OpStructFieldFloat32PtrString
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}
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return OpStructFieldFloat32Ptr
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case OpFloat64:
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if isString {
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return OpStructFieldFloat64String
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}
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return OpStructFieldFloat64
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case OpFloat64Ptr:
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if isString {
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return OpStructFieldFloat64PtrString
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}
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return OpStructFieldFloat64Ptr
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case OpString:
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if isString {
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return OpStructFieldStringString
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}
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return OpStructFieldString
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case OpStringPtr:
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if isString {
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return OpStructFieldStringPtrString
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}
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return OpStructFieldStringPtr
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case OpNumber:
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if isString {
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return OpStructFieldNumberString
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}
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return OpStructFieldNumber
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case OpNumberPtr:
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if isString {
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return OpStructFieldNumberPtrString
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}
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return OpStructFieldNumberPtr
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case OpBool:
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if isString {
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return OpStructFieldBoolString
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}
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return OpStructFieldBool
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case OpBoolPtr:
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if isString {
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return OpStructFieldBoolPtrString
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}
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return OpStructFieldBoolPtr
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case OpBytes:
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return OpStructFieldBytes
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case OpBytesPtr:
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return OpStructFieldBytesPtr
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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, typ *runtime.Type, op OpType) *Opcode {
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return newOpCodeWithNext(ctx, typ, op, newEndOp(ctx, typ))
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}
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func opcodeOffset(idx int) uint32 {
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return uint32(idx) * uintptrSize
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}
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func getCodeAddrByIdx(head *Opcode, idx uint32) *Opcode {
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addr := uintptr(unsafe.Pointer(head)) + uintptr(idx)*unsafe.Sizeof(Opcode{})
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return *(**Opcode)(unsafe.Pointer(&addr))
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}
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func copyOpcode(code *Opcode) *Opcode {
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codeNum := ToEndCode(code).DisplayIdx + 1
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codeSlice := make([]Opcode, codeNum)
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head := (*Opcode)((*runtime.SliceHeader)(unsafe.Pointer(&codeSlice)).Data)
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ptr := head
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c := code
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for {
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*ptr = Opcode{
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Op: c.Op,
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Key: c.Key,
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PtrNum: c.PtrNum,
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NumBitSize: c.NumBitSize,
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Flags: c.Flags,
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Idx: c.Idx,
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Offset: c.Offset,
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Type: c.Type,
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FieldQuery: c.FieldQuery,
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DisplayIdx: c.DisplayIdx,
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DisplayKey: c.DisplayKey,
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ElemIdx: c.ElemIdx,
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Length: c.Length,
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Size: c.Size,
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Indent: c.Indent,
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Jmp: c.Jmp,
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}
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if c.End != nil {
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ptr.End = getCodeAddrByIdx(head, c.End.DisplayIdx)
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}
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if c.NextField != nil {
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ptr.NextField = getCodeAddrByIdx(head, c.NextField.DisplayIdx)
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}
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if c.Next != nil {
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ptr.Next = getCodeAddrByIdx(head, c.Next.DisplayIdx)
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}
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if c.IsEnd() {
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break
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}
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ptr = getCodeAddrByIdx(head, c.DisplayIdx+1)
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c = c.IterNext()
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}
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return head
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}
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func setTotalLengthToInterfaceOp(code *Opcode) {
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for c := code; !c.IsEnd(); {
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if c.Op == OpInterface || c.Op == OpInterfacePtr {
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c.Length = uint32(code.TotalLength())
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}
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c = c.IterNext()
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}
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}
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func ToEndCode(code *Opcode) *Opcode {
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c := code
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for !c.IsEnd() {
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c = c.IterNext()
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}
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return c
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}
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func copyToInterfaceOpcode(code *Opcode) *Opcode {
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copied := copyOpcode(code)
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c := copied
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c = ToEndCode(c)
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c.Idx += uintptrSize
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c.ElemIdx = c.Idx + uintptrSize
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c.Length = c.Idx + 2*uintptrSize
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c.Op = OpInterfaceEnd
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return copied
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}
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func newOpCodeWithNext(ctx *compileContext, typ *runtime.Type, op OpType, next *Opcode) *Opcode {
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return &Opcode{
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Op: op,
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Idx: opcodeOffset(ctx.ptrIndex),
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Next: next,
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Type: typ,
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DisplayIdx: ctx.opcodeIndex,
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Indent: ctx.indent,
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}
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}
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func newEndOp(ctx *compileContext, typ *runtime.Type) *Opcode {
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return newOpCodeWithNext(ctx, typ, OpEnd, nil)
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}
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func (c *Opcode) TotalLength() int {
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var idx int
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code := c
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for !code.IsEnd() {
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maxIdx := int(code.MaxIdx() / uintptrSize)
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if idx < maxIdx {
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idx = maxIdx
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}
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if code.Op == OpRecursiveEnd {
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break
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}
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code = code.IterNext()
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}
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maxIdx := int(code.MaxIdx() / uintptrSize)
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if idx < maxIdx {
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idx = maxIdx
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}
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return idx + 1
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}
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func (c *Opcode) dumpHead(code *Opcode) string {
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var length uint32
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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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`[%03d]%s%s ([idx:%d][elemIdx:%d][length:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", int(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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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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`[%03d]%s%s ([idx:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", int(code.Indent)),
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code.Op,
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code.Idx/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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`[%03d]%s%s ([idx:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", int(code.Indent)),
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code.Op,
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code.Idx/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 uint32
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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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`[%03d]%s%s ([idx:%d][elemIdx:%d][length:%d][size:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", int(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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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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`[%03d]%s%s ([idx:%d][key:%s][offset:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", int(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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)
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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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`[%03d]%s%s ([idx:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", int(code.Indent)),
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code.Op,
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code.Idx/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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`[%03d]%s%s ([idx:%d])`,
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code.DisplayIdx,
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strings.Repeat("-", int(code.Indent)),
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code.Op,
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code.Idx/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.IsEnd(); {
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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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"[%03d]%s%s ([idx:%d])",
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code.DisplayIdx,
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strings.Repeat("-", int(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 (c *Opcode) DumpDOT() string {
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type edge struct {
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from, to *Opcode
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label string
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weight int
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}
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var edges []edge
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b := &bytes.Buffer{}
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fmt.Fprintf(b, "digraph \"%p\" {\n", c.Type)
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fmt.Fprintln(b, "mclimit=1.5;\nrankdir=TD;\nordering=out;\nnode[shape=box];")
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for code := c; !code.IsEnd(); {
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label := code.Op.String()
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fmt.Fprintf(b, "\"%p\" [label=%q];\n", code, label)
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if p := code.Next; p != nil {
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edges = append(edges, edge{
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from: code,
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to: p,
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label: "Next",
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weight: 10,
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})
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}
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if p := code.NextField; p != nil {
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edges = append(edges, edge{
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from: code,
|
|
to: p,
|
|
label: "NextField",
|
|
weight: 2,
|
|
})
|
|
}
|
|
if p := code.End; p != nil {
|
|
edges = append(edges, edge{
|
|
from: code,
|
|
to: p,
|
|
label: "End",
|
|
weight: 1,
|
|
})
|
|
}
|
|
if p := code.Jmp; p != nil {
|
|
edges = append(edges, edge{
|
|
from: code,
|
|
to: p.Code,
|
|
label: "Jmp",
|
|
weight: 1,
|
|
})
|
|
}
|
|
|
|
switch code.Op.CodeType() {
|
|
case CodeSliceHead:
|
|
code = code.Next
|
|
case CodeMapHead:
|
|
code = code.Next
|
|
case CodeArrayElem, CodeSliceElem:
|
|
code = code.End
|
|
case CodeMapKey:
|
|
code = code.End
|
|
case CodeMapValue:
|
|
code = code.Next
|
|
case CodeMapEnd:
|
|
code = code.Next
|
|
case CodeStructField:
|
|
code = code.Next
|
|
case CodeStructEnd:
|
|
code = code.Next
|
|
default:
|
|
code = code.Next
|
|
}
|
|
if code.IsEnd() {
|
|
fmt.Fprintf(b, "\"%p\" [label=%q];\n", code, code.Op.String())
|
|
}
|
|
}
|
|
sort.Slice(edges, func(i, j int) bool {
|
|
return edges[i].to.DisplayIdx < edges[j].to.DisplayIdx
|
|
})
|
|
for _, e := range edges {
|
|
fmt.Fprintf(b, "\"%p\" -> \"%p\" [label=%q][weight=%d];\n", e.from, e.to, e.label, e.weight)
|
|
}
|
|
fmt.Fprint(b, "}")
|
|
return b.String()
|
|
}
|
|
|
|
func newSliceHeaderCode(ctx *compileContext, typ *runtime.Type) *Opcode {
|
|
idx := opcodeOffset(ctx.ptrIndex)
|
|
ctx.incPtrIndex()
|
|
elemIdx := opcodeOffset(ctx.ptrIndex)
|
|
ctx.incPtrIndex()
|
|
length := opcodeOffset(ctx.ptrIndex)
|
|
return &Opcode{
|
|
Op: OpSlice,
|
|
Type: typ,
|
|
Idx: idx,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
ElemIdx: elemIdx,
|
|
Length: length,
|
|
Indent: ctx.indent,
|
|
}
|
|
}
|
|
|
|
func newSliceElemCode(ctx *compileContext, typ *runtime.Type, head *Opcode, size uintptr) *Opcode {
|
|
return &Opcode{
|
|
Op: OpSliceElem,
|
|
Type: typ,
|
|
Idx: head.Idx,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
ElemIdx: head.ElemIdx,
|
|
Length: head.Length,
|
|
Indent: ctx.indent,
|
|
Size: uint32(size),
|
|
}
|
|
}
|
|
|
|
func newArrayHeaderCode(ctx *compileContext, typ *runtime.Type, alen int) *Opcode {
|
|
idx := opcodeOffset(ctx.ptrIndex)
|
|
ctx.incPtrIndex()
|
|
elemIdx := opcodeOffset(ctx.ptrIndex)
|
|
return &Opcode{
|
|
Op: OpArray,
|
|
Type: typ,
|
|
Idx: idx,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
ElemIdx: elemIdx,
|
|
Indent: ctx.indent,
|
|
Length: uint32(alen),
|
|
}
|
|
}
|
|
|
|
func newArrayElemCode(ctx *compileContext, typ *runtime.Type, head *Opcode, length int, size uintptr) *Opcode {
|
|
return &Opcode{
|
|
Op: OpArrayElem,
|
|
Type: typ,
|
|
Idx: head.Idx,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
ElemIdx: head.ElemIdx,
|
|
Length: uint32(length),
|
|
Indent: ctx.indent,
|
|
Size: uint32(size),
|
|
}
|
|
}
|
|
|
|
func newMapHeaderCode(ctx *compileContext, typ *runtime.Type) *Opcode {
|
|
idx := opcodeOffset(ctx.ptrIndex)
|
|
ctx.incPtrIndex()
|
|
return &Opcode{
|
|
Op: OpMap,
|
|
Type: typ,
|
|
Idx: idx,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Indent: ctx.indent,
|
|
}
|
|
}
|
|
|
|
func newMapKeyCode(ctx *compileContext, typ *runtime.Type, head *Opcode) *Opcode {
|
|
return &Opcode{
|
|
Op: OpMapKey,
|
|
Type: typ,
|
|
Idx: head.Idx,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Indent: ctx.indent,
|
|
}
|
|
}
|
|
|
|
func newMapValueCode(ctx *compileContext, typ *runtime.Type, head *Opcode) *Opcode {
|
|
return &Opcode{
|
|
Op: OpMapValue,
|
|
Type: typ,
|
|
Idx: head.Idx,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Indent: ctx.indent,
|
|
}
|
|
}
|
|
|
|
func newMapEndCode(ctx *compileContext, typ *runtime.Type, head *Opcode) *Opcode {
|
|
return &Opcode{
|
|
Op: OpMapEnd,
|
|
Type: typ,
|
|
Idx: head.Idx,
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Indent: ctx.indent,
|
|
Next: newEndOp(ctx, typ),
|
|
}
|
|
}
|
|
|
|
func newRecursiveCode(ctx *compileContext, typ *runtime.Type, jmp *CompiledCode) *Opcode {
|
|
return &Opcode{
|
|
Op: OpRecursive,
|
|
Type: typ,
|
|
Idx: opcodeOffset(ctx.ptrIndex),
|
|
Next: newEndOp(ctx, typ),
|
|
DisplayIdx: ctx.opcodeIndex,
|
|
Indent: ctx.indent,
|
|
Jmp: jmp,
|
|
}
|
|
}
|