Add InterfaceEnd operation

cmd/generator/main.go

@@ -220,6 +220,7 @@ func (t opType) fieldToStringTagField() opType {
 	opTypes := []opType{
 		{"End", "EndIndent", "Op"},
 		{"Interface", "InterfaceIndent", "Op"},
+		{"InterfaceEnd", "InterfaceEndIndent", "Op"},
 		{"Ptr", "PtrIndent", "Op"},
 		{"SliceHead", "SliceHeadIndent", "SliceHead"},
 		{"RootSliceHead", "RootSliceHeadIndent", "SliceHead"},
@@ -252,6 +253,7 @@ func (t opType) fieldToStringTagField() opType {
 		{"StructFieldOmitEmpty", "StructFieldOmitEmptyIndent", "StructField"},
 		{"StructFieldStringTag", "StructFieldStringTagIndent", "StructField"},
 		{"StructFieldRecursive", "StructFieldRecursiveIndent", "StructFieldRecursive"},
+		{"StructFieldRecursiveEnd", "StructFieldRecursiveEndIndent", "Op"},
 		{"StructEnd", "StructEndIndent", "StructField"},
 		{"StructAnonymousEnd", "StructAnonymousEndIndent", "StructField"},
 	}

encode_opcode.go

@@ -80,7 +80,10 @@ func (c *opcode) beforeLastCode() *opcode {
 func (c *opcode) totalLength() int {
 	var idx int
 	for code := c; code.op != opEnd; {
-		idx = code.displayIdx
+		idx = int(code.idx / uintptrSize)
+		if code.op == opInterfaceEnd {
+			break
+		}
 		switch code.op.codeType() {
 		case codeArrayElem, codeSliceElem, codeMapKey:
 			code = code.end
@@ -88,7 +91,7 @@ func (c *opcode) totalLength() int {
 			code = code.next
 		}
 	}
-	return idx + 1
+	return idx + 2 // opEnd + 1
 }
 
 func (c *opcode) decOpcodeIndex() {
@@ -378,8 +381,8 @@ func newInterfaceCode(ctx *encodeCompileContext) *opcode {
 		displayIdx: ctx.opcodeIndex,
 		idx:        opcodeOffset(ctx.ptrIndex),
 		indent:     ctx.indent,
-		next:       newEndOp(ctx),
 		root:       ctx.root,
+		next:       newEndOp(ctx),
 	}
 }
 

encode_vm.go

@@ -22,6 +22,7 @@ func store(base uintptr, idx uintptr, p uintptr) {
 }
 
 func (e *Encoder) run(ctx *encodeRuntimeContext, recursiveLevel int, seenPtr map[uintptr]struct{}, code *opcode) error {
+	ptrOffset := uintptr(0)
 	ctxptr := ctx.ptr()
 	for {
 		switch code.op {
@@ -142,13 +143,43 @@ func (e *Encoder) run(ctx *encodeRuntimeContext, recursiveLevel int, seenPtr map
 				}
 				c = code
 			}
-			ctx := &encodeRuntimeContext{
-				ptrs: make([]uintptr, c.totalLength()),
+
+			beforeLastCode := c.beforeLastCode()
+			lastCode := beforeLastCode.next
+			lastCode.idx = beforeLastCode.idx + uintptrSize
+			totalLength := uintptr(code.totalLength())
+			nextTotalLength := uintptr(c.totalLength())
+			curlen := uintptr(len(ctx.ptrs))
+			offsetNum := ptrOffset / uintptrSize
+			oldOffset := ptrOffset
+			ptrOffset = ptrOffset + totalLength*uintptrSize // curlen * uintptrSize
 			}
-			ctx.init(uintptr(header.ptr))
-			if err := e.run(ctx, recursiveLevel+1, seenPtr, c); err != nil {
-				return err
+			newLen := offsetNum + totalLength + nextTotalLength
+			if curlen < newLen {
+				ctx.ptrs = append(ctx.ptrs, make([]uintptr, newLen-curlen)...)
+				store(ctx.ptr()+ptrOffset, 0, uintptr(header.ptr))
+			} else {
+				store(ctx.ptr()+ptrOffset, 0, uintptr(header.ptr))
 			}
+			ctxptr = ctx.ptr() + ptrOffset // assign new ctxptr
+			if load(ctxptr, 0) != uintptr(header.ptr) {
+				panic(nil)
+			}
+			// save current ctxptr
+			store(ctxptr, lastCode.idx, oldOffset)
+
+			// link lastCode ( opInterfaceEnd ) => code.next
+			lastCode.op = opInterfaceEnd
+			lastCode.next = code.next
+
+			code = c
+			recursiveLevel++
+		case opInterfaceEnd:
+			recursiveLevel--
+			// restore ctxptr
+			offset := load(ctxptr, code.idx)
+			ctxptr = ctx.ptr() + offset
+			ptrOffset = offset
 			code = code.next
 		case opMarshalJSON:
 			ptr := load(ctxptr, code.idx)