text: // Copyright (c) 2013, Vastech SA (PTY) LTD. All rights reserved.
  // http://github.com/gogo/protobuf/gogoproto
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  package proto
  
  import (
  	"reflect"
  )
  
  // Decode a reference to a struct pointer.
  func (o *Buffer) dec_ref_struct_message(p *Properties, base structPointer) (err error) {
  	raw, e := o.DecodeRawBytes(false)
  	if e != nil {
  		return e
  	}
  
  	// If the object can unmarshal itself, let it.
  	if p.isUnmarshaler {
  		panic("not supported, since this is a pointer receiver")
  	}
  
  	obuf := o.buf
  	oi := o.index
  	o.buf = raw
  	o.index = 0
  
  	bas := structPointer_FieldPointer(base, p.field)
  
  	err = o.unmarshalType(p.stype, p.sprop, false, bas)
  	o.buf = obuf
  	o.index = oi
  
  	return err
  }
  
  // Decode a slice of references to struct pointers ([]struct).
  func (o *Buffer) dec_slice_ref_struct(p *Properties, is_group bool, base structPointer) error {
  	newBas := appendStructPointer(base, p.field, p.sstype)
  
  	if is_group {
  		panic("not supported, maybe in future, if requested.")
  	}
  
  	raw, err := o.DecodeRawBytes(false)
  	if err != nil {
  		return err
  	}
  
  	// If the object can unmarshal itself, let it.
  	if p.isUnmarshaler {
  		panic("not supported, since this is not a pointer receiver.")
  	}
  
  	obuf := o.buf
  	oi := o.index
  	o.buf = raw
  	o.index = 0
  
  	err = o.unmarshalType(p.stype, p.sprop, is_group, newBas)
  
  	o.buf = obuf
  	o.index = oi
  
  	return err
  }
  
  // Decode a slice of references to struct pointers.
  func (o *Buffer) dec_slice_ref_struct_message(p *Properties, base structPointer) error {
  	return o.dec_slice_ref_struct(p, false, base)
  }
  
  func setPtrCustomType(base structPointer, f field, v interface{}) {
  	if v == nil {
  		return
  	}
  	structPointer_SetStructPointer(base, f, structPointer(reflect.ValueOf(v).Pointer()))
  }
  
  func setCustomType(base structPointer, f field, value interface{}) {
  	if value == nil {
  		return
  	}
  	v := reflect.ValueOf(value).Elem()
  	t := reflect.TypeOf(value).Elem()
  	kind := t.Kind()
  	switch kind {
  	case reflect.Slice:
  		slice := reflect.MakeSlice(t, v.Len(), v.Cap())
  		reflect.Copy(slice, v)
  		oldHeader := structPointer_GetSliceHeader(base, f)
  		oldHeader.Data = slice.Pointer()
  		oldHeader.Len = v.Len()
  		oldHeader.Cap = v.Cap()
  	default:
  		l := 1
  		size := reflect.TypeOf(value).Elem().Size()
  		if kind == reflect.Array {
  			l = reflect.TypeOf(value).Elem().Len()
  			size = reflect.TypeOf(value).Size()
  		}
  		total := int(size) * l
  		structPointer_Copy(toStructPointer(reflect.ValueOf(value)), structPointer_Add(base, f), total)
  	}
  }
  
  func (o *Buffer) dec_custom_bytes(p *Properties, base structPointer) error {
  	b, err := o.DecodeRawBytes(true)
  	if err != nil {
  		return err
  	}
  	i := reflect.New(p.ctype.Elem()).Interface()
  	custom := (i).(Unmarshaler)
  	if err := custom.Unmarshal(b); err != nil {
  		return err
  	}
  	setPtrCustomType(base, p.field, custom)
  	return nil
  }
  
  func (o *Buffer) dec_custom_ref_bytes(p *Properties, base structPointer) error {
  	b, err := o.DecodeRawBytes(true)
  	if err != nil {
  		return err
  	}
  	i := reflect.New(p.ctype).Interface()
  	custom := (i).(Unmarshaler)
  	if err := custom.Unmarshal(b); err != nil {
  		return err
  	}
  	if custom != nil {
  		setCustomType(base, p.field, custom)
  	}
  	return nil
  }
  
  // Decode a slice of bytes ([]byte) into a slice of custom types.
  func (o *Buffer) dec_custom_slice_bytes(p *Properties, base structPointer) error {
  	b, err := o.DecodeRawBytes(true)
  	if err != nil {
  		return err
  	}
  	i := reflect.New(p.ctype.Elem()).Interface()
  	custom := (i).(Unmarshaler)
  	if err := custom.Unmarshal(b); err != nil {
  		return err
  	}
  	newBas := appendStructPointer(base, p.field, p.ctype)
  
  	setCustomType(newBas, 0, custom)
  
  	return nil
  }
  