github.com/m3db/m3@v1.5.0/src/metrics/generated/proto/pipelinepb/custom_unmarshal.go (about)

     1  // Copyright (c) 2021 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package pipelinepb
    22  
    23  import (
    24  	"fmt"
    25  	"io"
    26  
    27  	"github.com/m3db/m3/src/metrics/generated/proto/aggregationpb"
    28  )
    29  
    30  // Unmarshal is a manual copy of the generated Unmarshal that allows reusing slices.
    31  func (m *AppliedPipeline) Unmarshal(dAtA []byte) error {
    32  	l := len(dAtA)
    33  	iNdEx := 0
    34  	for iNdEx < l {
    35  		preIndex := iNdEx
    36  		var wire uint64
    37  		for shift := uint(0); ; shift += 7 {
    38  			if shift >= 64 {
    39  				return ErrIntOverflowPipeline
    40  			}
    41  			if iNdEx >= l {
    42  				return io.ErrUnexpectedEOF
    43  			}
    44  			b := dAtA[iNdEx]
    45  			iNdEx++
    46  			wire |= (uint64(b) & 0x7F) << shift
    47  			if b < 0x80 {
    48  				break
    49  			}
    50  		}
    51  		fieldNum := int32(wire >> 3)
    52  		wireType := int(wire & 0x7)
    53  		if wireType == 4 {
    54  			return fmt.Errorf("proto: AppliedPipeline: wiretype end group for non-group")
    55  		}
    56  		if fieldNum <= 0 {
    57  			return fmt.Errorf("proto: AppliedPipeline: illegal tag %d (wire type %d)", fieldNum, wire)
    58  		}
    59  		switch fieldNum {
    60  		case 1:
    61  			if wireType != 2 {
    62  				return fmt.Errorf("proto: wrong wireType = %d for field Ops", wireType)
    63  			}
    64  			var msglen int
    65  			for shift := uint(0); ; shift += 7 {
    66  				if shift >= 64 {
    67  					return ErrIntOverflowPipeline
    68  				}
    69  				if iNdEx >= l {
    70  					return io.ErrUnexpectedEOF
    71  				}
    72  				b := dAtA[iNdEx]
    73  				iNdEx++
    74  				msglen |= (int(b) & 0x7F) << shift
    75  				if b < 0x80 {
    76  					break
    77  				}
    78  			}
    79  			if msglen < 0 {
    80  				return ErrInvalidLengthPipeline
    81  			}
    82  			postIndex := iNdEx + msglen
    83  			if postIndex > l {
    84  				return io.ErrUnexpectedEOF
    85  			}
    86  			if cap(m.Ops) > len(m.Ops) {
    87  				m.Ops = m.Ops[0 : len(m.Ops)+1]
    88  			} else {
    89  				m.Ops = append(m.Ops, AppliedPipelineOp{})
    90  			}
    91  			if err := m.Ops[len(m.Ops)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
    92  				return err
    93  			}
    94  			iNdEx = postIndex
    95  		default:
    96  			iNdEx = preIndex
    97  			skippy, err := skipPipeline(dAtA[iNdEx:])
    98  			if err != nil {
    99  				return err
   100  			}
   101  			if skippy < 0 {
   102  				return ErrInvalidLengthPipeline
   103  			}
   104  			if (iNdEx + skippy) > l {
   105  				return io.ErrUnexpectedEOF
   106  			}
   107  			iNdEx += skippy
   108  		}
   109  	}
   110  
   111  	if iNdEx > l {
   112  		return io.ErrUnexpectedEOF
   113  	}
   114  	return nil
   115  }
   116  
   117  func (m *AppliedPipeline) Reuse() {
   118  	if m == nil {
   119  		return
   120  	}
   121  	for i := range m.Ops {
   122  		m.Ops[i].reuse()
   123  	}
   124  	m.Ops = m.Ops[:0]
   125  }
   126  
   127  func (m *AppliedPipelineOp) reuse() {
   128  	m.Type = 0
   129  	m.Transformation = TransformationOp{}
   130  	m.Rollup.reuse()
   131  }
   132  
   133  func (m *AppliedRollupOp) reuse() {
   134  	m.Id = m.Id[:0]
   135  	m.AggregationId = aggregationpb.AggregationID{}
   136  }