-
Notifications
You must be signed in to change notification settings - Fork 198
/
lua.go
157 lines (142 loc) · 3.84 KB
/
lua.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
// +build !app_engine
// Copyright 2013-2019 Aerospike, Inc.
//
// 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 lua
import (
"fmt"
"reflect"
"github.com/yuin/gopher-lua"
)
// NewValue creates a value from interface{} in the interpreter
func NewValue(L *lua.LState, value interface{}) lua.LValue {
// Nils should return immediately
if value == nil {
return lua.LNil
}
// if it is a LValue already, return it without delay
if lval, ok := value.(lua.LValue); ok {
return lval
}
switch v := value.(type) {
case string:
return lua.LString(v)
case int:
return lua.LNumber(float64(v))
case uint:
return lua.LNumber(float64(v))
case int8:
return lua.LNumber(float64(v))
case uint8:
return lua.LNumber(float64(v))
case int16:
return lua.LNumber(float64(v))
case uint16:
return lua.LNumber(float64(v))
case int32:
return lua.LNumber(float64(v))
case uint32:
return lua.LNumber(float64(v))
case int64:
return lua.LNumber(float64(v))
case uint64:
return lua.LNumber(float64(v))
case float32:
return lua.LNumber(float64(v))
case float64:
return lua.LNumber(v)
case bool:
return lua.LBool(v)
case map[interface{}]interface{}:
luaMap := &LuaMap{m: v}
ud := L.NewUserData()
ud.Value = luaMap
L.SetMetatable(ud, L.GetTypeMetatable(luaLuaMapTypeName))
return ud
case []interface{}:
luaList := &LuaList{l: v}
ud := L.NewUserData()
ud.Value = luaList
L.SetMetatable(ud, L.GetTypeMetatable(luaLuaListTypeName))
return ud
}
// check for array and map
rv := reflect.ValueOf(value)
switch rv.Kind() {
case reflect.Array, reflect.Slice:
l := rv.Len()
arr := make([]interface{}, l)
for i := 0; i < l; i++ {
arr[i] = rv.Index(i).Interface()
}
return NewValue(L, arr)
case reflect.Map:
l := rv.Len()
amap := make(map[interface{}]interface{}, l)
for _, i := range rv.MapKeys() {
amap[i.Interface()] = rv.MapIndex(i).Interface()
}
return NewValue(L, amap)
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return NewValue(L, reflect.ValueOf(value).Int())
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32:
return NewValue(L, int64(reflect.ValueOf(value).Uint()))
case reflect.String:
return NewValue(L, rv.String())
case reflect.Float32, reflect.Float64:
return NewValue(L, rv.Float())
case reflect.Bool:
return NewValue(L, rv.Bool())
}
panic(fmt.Sprintf("unrecognized data type for lua: %#v\n", value))
}
// LValueToInterface converts a generic LValue to a native type
func LValueToInterface(val lua.LValue) interface{} {
switch val.Type() {
case lua.LTNil:
return nil
case lua.LTBool:
return lua.LVAsBool(val)
case lua.LTNumber:
return float64(lua.LVAsNumber(val))
case lua.LTString:
return lua.LVAsString(val)
case lua.LTUserData:
ud := val.(*lua.LUserData).Value
switch v := ud.(type) {
case *LuaMap:
return v.m
case *LuaList:
return v.l
default:
return v
}
case lua.LTTable:
t := val.(*lua.LTable)
m := make(map[interface{}]interface{}, t.Len())
t.ForEach(func(k, v lua.LValue) { m[k] = v })
return m
default:
panic(fmt.Sprintf("unrecognized data type %#v", val))
}
}
func allToString(L *lua.LState) int {
ud := L.CheckUserData(1)
value := ud.Value
if stringer, ok := value.(fmt.Stringer); ok {
L.Push(lua.LString(stringer.String()))
} else {
L.Push(lua.LString(fmt.Sprintf("%v", value)))
}
return 1
}