forked from mirror/go-json
142 lines
2.7 KiB
Go
142 lines
2.7 KiB
Go
package encoder
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import (
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"sync"
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"unsafe"
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"github.com/goccy/go-json/internal/runtime"
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)
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type compileContext struct {
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typ *runtime.Type
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opcodeIndex uint32
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ptrIndex int
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indent uint32
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escapeKey bool
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structTypeToCompiledCode map[uintptr]*CompiledCode
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parent *compileContext
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}
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func (c *compileContext) context() *compileContext {
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return &compileContext{
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typ: c.typ,
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opcodeIndex: c.opcodeIndex,
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ptrIndex: c.ptrIndex,
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indent: c.indent,
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escapeKey: c.escapeKey,
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structTypeToCompiledCode: c.structTypeToCompiledCode,
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parent: c,
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}
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}
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func (c *compileContext) withType(typ *runtime.Type) *compileContext {
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ctx := c.context()
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ctx.typ = typ
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return ctx
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}
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func (c *compileContext) incIndent() *compileContext {
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ctx := c.context()
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ctx.indent++
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return ctx
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}
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func (c *compileContext) decIndent() *compileContext {
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ctx := c.context()
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ctx.indent--
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return ctx
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}
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func (c *compileContext) incIndex() {
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c.incOpcodeIndex()
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c.incPtrIndex()
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}
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func (c *compileContext) decIndex() {
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c.decOpcodeIndex()
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c.decPtrIndex()
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}
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func (c *compileContext) incOpcodeIndex() {
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c.opcodeIndex++
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if c.parent != nil {
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c.parent.incOpcodeIndex()
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}
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}
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func (c *compileContext) decOpcodeIndex() {
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c.opcodeIndex--
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if c.parent != nil {
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c.parent.decOpcodeIndex()
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}
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}
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func (c *compileContext) incPtrIndex() {
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c.ptrIndex++
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if c.parent != nil {
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c.parent.incPtrIndex()
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}
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}
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func (c *compileContext) decPtrIndex() {
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c.ptrIndex--
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if c.parent != nil {
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c.parent.decPtrIndex()
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}
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}
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const (
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bufSize = 1024
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)
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var (
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runtimeContextPool = sync.Pool{
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New: func() interface{} {
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return &RuntimeContext{
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Buf: make([]byte, 0, bufSize),
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Ptrs: make([]uintptr, 128),
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KeepRefs: make([]unsafe.Pointer, 0, 8),
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Option: &Option{},
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}
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},
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}
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)
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type RuntimeContext struct {
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Buf []byte
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MarshalBuf []byte
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Ptrs []uintptr
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KeepRefs []unsafe.Pointer
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SeenPtr []uintptr
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BaseIndent uint32
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Prefix []byte
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IndentStr []byte
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Code *Opcode
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Option *Option
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}
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func (c *RuntimeContext) Init(code *Opcode, p uintptr, codelen int) {
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if len(c.Ptrs) < codelen {
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c.Ptrs = make([]uintptr, codelen)
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}
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c.Ptrs[0] = p
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c.KeepRefs = c.KeepRefs[:0]
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c.SeenPtr = c.SeenPtr[:0]
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c.BaseIndent = 0
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c.Code = code
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}
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func (c *RuntimeContext) Ptr() uintptr {
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header := (*runtime.SliceHeader)(unsafe.Pointer(&c.Ptrs))
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return uintptr(header.Data)
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}
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func TakeRuntimeContext() *RuntimeContext {
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return runtimeContextPool.Get().(*RuntimeContext)
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}
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func ReleaseRuntimeContext(ctx *RuntimeContext) {
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runtimeContextPool.Put(ctx)
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}
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