Method ptrstringval

structencoder.go:460–480

ptrstringval is essentially the same as ptrval but quotes strings if not nil

(conv func(unsafe.Pointer, *Buffer))

// ptrstringval is essentially the same as ptrval but quotes strings if not nil
func (e *StructEncoder) ptrstringval(conv func(unsafe.Pointer, *Buffer)) {
	e.flunk() // flush any chunk data we've buffered

	// avoids allocs at runtime
	null := []byte("null")

	f := e.f
	e.appendInstructionFun(func(v unsafe.Pointer, w *Buffer) {

		p := unsafe.Pointer(*(*unsafe.Pointer)(unsafe.Pointer(uintptr(v) + f.Offset)))
		if p == unsafe.Pointer(nil) {
			w.Write(null)
			return
		}

		// quotes need to be at runtime here because we don't know if we're going to have to null the field
		w.WriteByte('"')
		conv(p, w)
		w.WriteByte('"')
	})
}

// JSONEncoder works with the `.encoder` option. Fields can implement this to encode their own JSON string straight
// into the working buffer. This can be useful if you're working with interface fields at runtime.