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