forked from mirror/go-json
38 lines
754 B
Go
38 lines
754 B
Go
package json
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import (
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"unsafe"
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)
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type ptrDecoder struct {
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dec decoder
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typ *rtype
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}
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func newPtrDecoder(dec decoder, typ *rtype) *ptrDecoder {
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return &ptrDecoder{dec: dec, typ: typ}
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}
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//go:linkname unsafe_New reflect.unsafe_New
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func unsafe_New(*rtype) uintptr
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func (d *ptrDecoder) decodeStream(s *stream, p uintptr) error {
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newptr := unsafe_New(d.typ)
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if err := d.dec.decodeStream(s, newptr); err != nil {
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return err
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}
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*(*uintptr)(unsafe.Pointer(p)) = newptr
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return nil
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}
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func (d *ptrDecoder) decode(buf []byte, cursor int64, p uintptr) (int64, error) {
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newptr := unsafe_New(d.typ)
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c, err := d.dec.decode(buf, cursor, newptr)
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if err != nil {
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return 0, err
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}
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cursor = c
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*(*uintptr)(unsafe.Pointer(p)) = newptr
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return cursor, nil
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}
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