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Girish Kumare48ec8a2020-08-18 12:28:51 +00001/*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20package thrift
21
22import (
23 "math"
24 "strconv"
25)
26
27type Numeric interface {
28 Int64() int64
29 Int32() int32
30 Int16() int16
31 Byte() byte
32 Int() int
33 Float64() float64
34 Float32() float32
35 String() string
36 isNull() bool
37}
38
39type numeric struct {
40 iValue int64
41 dValue float64
42 sValue string
43 isNil bool
44}
45
46var (
47 INFINITY Numeric
48 NEGATIVE_INFINITY Numeric
49 NAN Numeric
50 ZERO Numeric
51 NUMERIC_NULL Numeric
52)
53
54func NewNumericFromDouble(dValue float64) Numeric {
55 if math.IsInf(dValue, 1) {
56 return INFINITY
57 }
58 if math.IsInf(dValue, -1) {
59 return NEGATIVE_INFINITY
60 }
61 if math.IsNaN(dValue) {
62 return NAN
63 }
64 iValue := int64(dValue)
65 sValue := strconv.FormatFloat(dValue, 'g', 10, 64)
66 isNil := false
67 return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
68}
69
70func NewNumericFromI64(iValue int64) Numeric {
71 dValue := float64(iValue)
72 sValue := string(iValue)
73 isNil := false
74 return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
75}
76
77func NewNumericFromI32(iValue int32) Numeric {
78 dValue := float64(iValue)
79 sValue := string(iValue)
80 isNil := false
81 return &numeric{iValue: int64(iValue), dValue: dValue, sValue: sValue, isNil: isNil}
82}
83
84func NewNumericFromString(sValue string) Numeric {
85 if sValue == INFINITY.String() {
86 return INFINITY
87 }
88 if sValue == NEGATIVE_INFINITY.String() {
89 return NEGATIVE_INFINITY
90 }
91 if sValue == NAN.String() {
92 return NAN
93 }
94 iValue, _ := strconv.ParseInt(sValue, 10, 64)
95 dValue, _ := strconv.ParseFloat(sValue, 64)
96 isNil := len(sValue) == 0
97 return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNil}
98}
99
100func NewNumericFromJSONString(sValue string, isNull bool) Numeric {
101 if isNull {
102 return NewNullNumeric()
103 }
104 if sValue == JSON_INFINITY {
105 return INFINITY
106 }
107 if sValue == JSON_NEGATIVE_INFINITY {
108 return NEGATIVE_INFINITY
109 }
110 if sValue == JSON_NAN {
111 return NAN
112 }
113 iValue, _ := strconv.ParseInt(sValue, 10, 64)
114 dValue, _ := strconv.ParseFloat(sValue, 64)
115 return &numeric{iValue: iValue, dValue: dValue, sValue: sValue, isNil: isNull}
116}
117
118func NewNullNumeric() Numeric {
119 return &numeric{iValue: 0, dValue: 0.0, sValue: "", isNil: true}
120}
121
122func (p *numeric) Int64() int64 {
123 return p.iValue
124}
125
126func (p *numeric) Int32() int32 {
127 return int32(p.iValue)
128}
129
130func (p *numeric) Int16() int16 {
131 return int16(p.iValue)
132}
133
134func (p *numeric) Byte() byte {
135 return byte(p.iValue)
136}
137
138func (p *numeric) Int() int {
139 return int(p.iValue)
140}
141
142func (p *numeric) Float64() float64 {
143 return p.dValue
144}
145
146func (p *numeric) Float32() float32 {
147 return float32(p.dValue)
148}
149
150func (p *numeric) String() string {
151 return p.sValue
152}
153
154func (p *numeric) isNull() bool {
155 return p.isNil
156}
157
158func init() {
159 INFINITY = &numeric{iValue: 0, dValue: math.Inf(1), sValue: "Infinity", isNil: false}
160 NEGATIVE_INFINITY = &numeric{iValue: 0, dValue: math.Inf(-1), sValue: "-Infinity", isNil: false}
161 NAN = &numeric{iValue: 0, dValue: math.NaN(), sValue: "NaN", isNil: false}
162 ZERO = &numeric{iValue: 0, dValue: 0, sValue: "0", isNil: false}
163 NUMERIC_NULL = &numeric{iValue: 0, dValue: 0, sValue: "0", isNil: true}
164}