/*
Copyright 2015 The Kubernetes Authors.
Copyright 2020 Authors of Arktos - file modified.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package resource

import (
	"fmt"
	"io"
	"math/bits"

	"github.com/gogo/protobuf/proto"
)

var _ proto.Sizer = &Quantity{}

func (m *Quantity) Marshal() (data []byte, err error) {
	size := m.Size()
	data = make([]byte, size)
	n, err := m.MarshalToSizedBuffer(data[:size])
	if err != nil {
		return nil, err
	}
	return data[:n], nil
}

// MarshalTo is a customized version of the generated Protobuf unmarshaler for a struct
// with a single string field.
func (m *Quantity) MarshalTo(data []byte) (int, error) {
	size := m.Size()
	return m.MarshalToSizedBuffer(data[:size])
}

// MarshalToSizedBuffer is a customized version of the generated
// Protobuf unmarshaler for a struct with a single string field.
func (m *Quantity) MarshalToSizedBuffer(data []byte) (int, error) {
	i := len(data)
	_ = i
	var l int
	_ = l

	// BEGIN CUSTOM MARSHAL
	out := m.String()
	i -= len(out)
	copy(data[i:], out)
	i = encodeVarintGenerated(data, i, uint64(len(out)))
	// END CUSTOM MARSHAL
	i--
	data[i] = 0xa

	return len(data) - i, nil
}

func encodeVarintGenerated(data []byte, offset int, v uint64) int {
	offset -= sovGenerated(v)
	base := offset
	for v >= 1<<7 {
		data[offset] = uint8(v&0x7f | 0x80)
		v >>= 7
		offset++
	}
	data[offset] = uint8(v)
	return base
}

func (m *Quantity) Size() (n int) {
	var l int
	_ = l

	// BEGIN CUSTOM SIZE
	l = len(m.String())
	// END CUSTOM SIZE

	n += 1 + l + sovGenerated(uint64(l))
	return n
}

func sovGenerated(x uint64) (n int) {
	return (bits.Len64(x|1) + 6) / 7
}

// Unmarshal is a customized version of the generated Protobuf unmarshaler for a struct
// with a single string field.
func (m *Quantity) Unmarshal(data []byte) error {
	l := len(data)
	iNdEx := 0
	for iNdEx < l {
		preIndex := iNdEx
		var wire uint64
		for shift := uint(0); ; shift += 7 {
			if shift >= 64 {
				return ErrIntOverflowGenerated
			}
			if iNdEx >= l {
				return io.ErrUnexpectedEOF
			}
			b := data[iNdEx]
			iNdEx++
			wire |= (uint64(b) & 0x7F) << shift
			if b < 0x80 {
				break
			}
		}
		fieldNum := int32(wire >> 3)
		wireType := int(wire & 0x7)
		if wireType == 4 {
			return fmt.Errorf("proto: Quantity: wiretype end group for non-group")
		}
		if fieldNum <= 0 {
			return fmt.Errorf("proto: Quantity: illegal tag %d (wire type %d)", fieldNum, wire)
		}
		switch fieldNum {
		case 1:
			if wireType != 2 {
				return fmt.Errorf("proto: wrong wireType = %d for field String_", wireType)
			}
			var stringLen uint64
			for shift := uint(0); ; shift += 7 {
				if shift >= 64 {
					return ErrIntOverflowGenerated
				}
				if iNdEx >= l {
					return io.ErrUnexpectedEOF
				}
				b := data[iNdEx]
				iNdEx++
				stringLen |= (uint64(b) & 0x7F) << shift
				if b < 0x80 {
					break
				}
			}
			intStringLen := int(stringLen)
			if intStringLen < 0 {
				return ErrInvalidLengthGenerated
			}
			postIndex := iNdEx + intStringLen
			if postIndex > l {
				return io.ErrUnexpectedEOF
			}
			s := string(data[iNdEx:postIndex])

			// BEGIN CUSTOM DECODE
			p, err := ParseQuantity(s)
			if err != nil {
				return err
			}
			*m = p
			// END CUSTOM DECODE

			iNdEx = postIndex
		default:
			iNdEx = preIndex
			skippy, err := skipGenerated(data[iNdEx:])
			if err != nil {
				return err
			}
			if skippy < 0 {
				return ErrInvalidLengthGenerated
			}
			if (iNdEx + skippy) > l {
				return io.ErrUnexpectedEOF
			}
			iNdEx += skippy
		}
	}

	if iNdEx > l {
		return io.ErrUnexpectedEOF
	}
	return nil
}

func skipGenerated(data []byte) (n int, err error) {
	l := len(data)
	iNdEx := 0
	for iNdEx < l {
		var wire uint64
		for shift := uint(0); ; shift += 7 {
			if shift >= 64 {
				return 0, ErrIntOverflowGenerated
			}
			if iNdEx >= l {
				return 0, io.ErrUnexpectedEOF
			}
			b := data[iNdEx]
			iNdEx++
			wire |= (uint64(b) & 0x7F) << shift
			if b < 0x80 {
				break
			}
		}
		wireType := int(wire & 0x7)
		switch wireType {
		case 0:
			for shift := uint(0); ; shift += 7 {
				if shift >= 64 {
					return 0, ErrIntOverflowGenerated
				}
				if iNdEx >= l {
					return 0, io.ErrUnexpectedEOF
				}
				iNdEx++
				if data[iNdEx-1] < 0x80 {
					break
				}
			}
			return iNdEx, nil
		case 1:
			iNdEx += 8
			return iNdEx, nil
		case 2:
			var length int
			for shift := uint(0); ; shift += 7 {
				if shift >= 64 {
					return 0, ErrIntOverflowGenerated
				}
				if iNdEx >= l {
					return 0, io.ErrUnexpectedEOF
				}
				b := data[iNdEx]
				iNdEx++
				length |= (int(b) & 0x7F) << shift
				if b < 0x80 {
					break
				}
			}
			iNdEx += length
			if length < 0 {
				return 0, ErrInvalidLengthGenerated
			}
			return iNdEx, nil
		case 3:
			for {
				var innerWire uint64
				var start int = iNdEx
				for shift := uint(0); ; shift += 7 {
					if shift >= 64 {
						return 0, ErrIntOverflowGenerated
					}
					if iNdEx >= l {
						return 0, io.ErrUnexpectedEOF
					}
					b := data[iNdEx]
					iNdEx++
					innerWire |= (uint64(b) & 0x7F) << shift
					if b < 0x80 {
						break
					}
				}
				innerWireType := int(innerWire & 0x7)
				if innerWireType == 4 {
					break
				}
				next, err := skipGenerated(data[start:])
				if err != nil {
					return 0, err
				}
				iNdEx = start + next
			}
			return iNdEx, nil
		case 4:
			return iNdEx, nil
		case 5:
			iNdEx += 4
			return iNdEx, nil
		default:
			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
		}
	}
	panic("unreachable")
}

var (
	ErrInvalidLengthGenerated = fmt.Errorf("proto: negative length found during unmarshaling")
	ErrIntOverflowGenerated   = fmt.Errorf("proto: integer overflow")
)
