github.com/hasnat/dolt/go@v0.0.0-20210628190320-9eb5d843fbb7/store/types/float.go (about)

     1  // Copyright 2019 Dolthub, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  //
    15  // This file incorporates work covered by the following copyright and
    16  // permission notice:
    17  //
    18  // Copyright 2016 Attic Labs, Inc. All rights reserved.
    19  // Licensed under the Apache License, version 2.0:
    20  // http://www.apache.org/licenses/LICENSE-2.0
    21  
    22  package types
    23  
    24  import (
    25  	"context"
    26  	"strconv"
    27  
    28  	"github.com/dolthub/dolt/go/store/hash"
    29  )
    30  
    31  // Float is a Noms Value wrapper around the primitive float64 type.
    32  type Float float64
    33  
    34  // Value interface
    35  func (v Float) Value(ctx context.Context) (Value, error) {
    36  	return v, nil
    37  }
    38  
    39  func (v Float) Equals(other Value) bool {
    40  	return v == other
    41  }
    42  
    43  func (v Float) Less(nbf *NomsBinFormat, other LesserValuable) (bool, error) {
    44  	if v2, ok := other.(Float); ok {
    45  		return v < v2, nil
    46  	}
    47  	return FloatKind < other.Kind(), nil
    48  }
    49  
    50  func (v Float) Hash(nbf *NomsBinFormat) (hash.Hash, error) {
    51  	return getHash(v, nbf)
    52  }
    53  
    54  func (v Float) isPrimitive() bool {
    55  	return true
    56  }
    57  
    58  func (v Float) WalkValues(ctx context.Context, cb ValueCallback) error {
    59  	return nil
    60  }
    61  
    62  func (v Float) WalkRefs(nbf *NomsBinFormat, cb RefCallback) error {
    63  	return nil
    64  }
    65  
    66  func (v Float) typeOf() (*Type, error) {
    67  	return PrimitiveTypeMap[FloatKind], nil
    68  }
    69  
    70  func (v Float) Kind() NomsKind {
    71  	return FloatKind
    72  }
    73  
    74  func (v Float) valueReadWriter() ValueReadWriter {
    75  	return nil
    76  }
    77  
    78  func (v Float) writeTo(w nomsWriter, nbf *NomsBinFormat) error {
    79  	err := FloatKind.writeTo(w, nbf)
    80  
    81  	if err != nil {
    82  		return err
    83  	}
    84  
    85  	w.writeFloat(v, nbf)
    86  	return nil
    87  }
    88  
    89  func (v Float) readFrom(nbf *NomsBinFormat, b *binaryNomsReader) (Value, error) {
    90  	return Float(b.ReadFloat(nbf)), nil
    91  }
    92  
    93  func (v Float) skip(nbf *NomsBinFormat, b *binaryNomsReader) {
    94  	b.skipFloat(nbf)
    95  }
    96  
    97  func (v Float) HumanReadableString() string {
    98  	return strconv.FormatFloat(float64(v), 'g', -1, 64)
    99  }