Tue, 06 Apr 2010 14:47:21 +0100
Add debugMode switch
0 | 1 | |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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2 | var OP_MOVE = 0; |
0 | 3 | var OP_LOADK = 1; |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
|
4 | var OP_LOADNIL = 3; |
0 | 5 | var OP_GETGLOBAL = 5; |
6 | 6 | var OP_SETGLOBAL = 7; |
0 | 7 | var OP_CALL = 28; |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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8 | var OP_RETURN = 30; |
0 | 9 | |
8 | 10 | var debugMode = false; |
11 | ||
0 | 12 | function LValue(type, value) |
13 | { | |
14 | this.type = type||"nil"; | |
15 | this.value = value||null; | |
16 | } | |
17 | ||
18 | LValue.prototype = { | |
19 | call: function (args) | |
20 | { | |
3
6f338fbf0abc
Throw an error if trying to call a non-function
Matthew Wild <mwild1@gmail.com>
parents:
2
diff
changeset
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21 | if(this.type == "function") |
6f338fbf0abc
Throw an error if trying to call a non-function
Matthew Wild <mwild1@gmail.com>
parents:
2
diff
changeset
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22 | return this.value; |
6f338fbf0abc
Throw an error if trying to call a non-function
Matthew Wild <mwild1@gmail.com>
parents:
2
diff
changeset
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23 | else |
6f338fbf0abc
Throw an error if trying to call a non-function
Matthew Wild <mwild1@gmail.com>
parents:
2
diff
changeset
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24 | throw "Attempt to call a " + this.type + " value"; |
0 | 25 | }, |
26 | index: function (key) | |
27 | { | |
28 | if(this.type == "table") | |
29 | { | |
4
0eda73eda4ae
Return nil for non-existent table keys
Matthew Wild <mwild1@gmail.com>
parents:
3
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changeset
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30 | var val = this.value[key.value]; |
0eda73eda4ae
Return nil for non-existent table keys
Matthew Wild <mwild1@gmail.com>
parents:
3
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changeset
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31 | if(typeof(val) == "undefined") |
0eda73eda4ae
Return nil for non-existent table keys
Matthew Wild <mwild1@gmail.com>
parents:
3
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32 | return new LValue("nil", null); |
0eda73eda4ae
Return nil for non-existent table keys
Matthew Wild <mwild1@gmail.com>
parents:
3
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33 | return val; |
0 | 34 | } |
7
00ec5f6e7579
Add errors for when trying to index non-tables
Matthew Wild <mwild1@gmail.com>
parents:
6
diff
changeset
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35 | else |
00ec5f6e7579
Add errors for when trying to index non-tables
Matthew Wild <mwild1@gmail.com>
parents:
6
diff
changeset
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36 | throw "Attempt to index a " + this.type + " value"; |
0 | 37 | }, |
38 | setIndex: function (key, value) | |
39 | { | |
40 | if(this.type == "table") | |
41 | { | |
42 | this.value[key.value] = value; | |
43 | } | |
7
00ec5f6e7579
Add errors for when trying to index non-tables
Matthew Wild <mwild1@gmail.com>
parents:
6
diff
changeset
|
44 | else |
00ec5f6e7579
Add errors for when trying to index non-tables
Matthew Wild <mwild1@gmail.com>
parents:
6
diff
changeset
|
45 | throw "Attempt to index a " + this.type + " value"; |
0 | 46 | } |
47 | }; | |
48 | ||
49 | function LValueFromString(string) | |
50 | { | |
51 | return new LValue("string", string); | |
52 | } | |
53 | ||
54 | function LValueFromFunction(func) | |
55 | { | |
56 | return new LValue("function", func); | |
57 | } | |
58 | ||
59 | var default_environment = new LValue("table", {}); | |
60 | ||
61 | var print; | |
62 | if(typeof(document) == "object") | |
1 | 63 | print = function (a) { document.write(a+"<br/>") }; // Browser |
0 | 64 | else |
1 | 65 | print = require("sys").puts; // Nodejs |
66 | ||
0 | 67 | default_environment.setIndex(LValueFromString("print"), LValueFromFunction(print)); |
68 | ||
69 | function LFunction() | |
70 | { | |
71 | this.constants = []; | |
72 | this.instructions = []; | |
73 | this.environment = default_environment; | |
74 | return this; | |
75 | } | |
76 | ||
77 | LFunction.prototype = { | |
78 | addInstruction: function (instruction) | |
79 | { | |
80 | this.instructions.push(instruction); | |
81 | }, | |
82 | addConstant: function (constant) | |
83 | { | |
84 | this.constants.push(constant); | |
85 | } | |
86 | }; | |
87 | ||
88 | function LVM() | |
89 | { | |
90 | this.callstack = []; | |
91 | this.stack = []; | |
92 | return this; | |
93 | } | |
94 | ||
95 | LVM.prototype = { | |
96 | run: function (lfFunction) | |
97 | { | |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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98 | this.frame = {f:lfFunction,pc:0,reg:[]}; |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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99 | this.callstack.push(this.frame); |
0 | 100 | var instruction; |
101 | while(this.callstack.length>0) | |
102 | { | |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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103 | instruction = this.frame.f.instructions[this.frame.pc++]; |
0 | 104 | switch(instruction[0]) |
105 | { | |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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106 | case OP_MOVE: |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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107 | this.frame.reg[instruction[1]] = this.frame.reg[instruction[2]]; |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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108 | break; |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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109 | case OP_LOADNIL: |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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110 | for(var i = instruction[1];i<=instruction[2];i++) |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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111 | this.frame.reg[i] = new LValue("nil", null); |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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112 | break; |
0 | 113 | case OP_GETGLOBAL: |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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114 | var name = this.frame.f.constants[instruction[2]]; |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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115 | this.frame.reg[instruction[1]] = this.frame.f.environment.index(name); |
0 | 116 | break; |
6 | 117 | case OP_SETGLOBAL: |
118 | var name = this.frame.f.constants[instruction[2]]; | |
119 | this.frame.f.environment.setIndex(name, this.frame.reg[instruction[1]]); | |
120 | break; | |
0 | 121 | case OP_LOADK: |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
|
122 | var value = this.frame.f.constants[instruction[2]]; |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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123 | this.frame.reg[instruction[1]] = value; |
0 | 124 | break; |
125 | case OP_CALL: | |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
|
126 | var f = this.frame.reg[instruction[1]].call(); // return JS or LValue |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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127 | var args = this.frame.reg.splice(instruction[1]+1, instruction[1]+(instruction[2]-1)); |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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128 | if(typeof(f) == "function") |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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129 | { |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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130 | // JS native function |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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131 | var ret = f.apply(null, args.map(function (a) { return a.value; })); |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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132 | } |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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133 | else |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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134 | { |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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135 | // Lua function |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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136 | } |
0 | 137 | break; |
138 | case OP_RETURN: | |
139 | this.callstack.pop(); | |
140 | break; | |
141 | default: | |
142 | } | |
143 | } | |
144 | } | |
145 | }; | |
146 | ||
147 | var testvm = new LVM(); | |
148 | var mycode = new LFunction(); | |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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149 | |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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150 | mycode.addConstant(LValueFromString("hello")); |
0 | 151 | mycode.addConstant(LValueFromString("print")); |
2
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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152 | |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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153 | mycode.addInstruction([OP_LOADK, 0, 0]); |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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154 | mycode.addInstruction([OP_LOADNIL, 1, 1]); |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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155 | mycode.addInstruction([OP_MOVE, 1, 0]); |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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156 | mycode.addInstruction([OP_GETGLOBAL, 2, 1]); |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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157 | mycode.addInstruction([OP_MOVE, 3, 1]); |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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158 | mycode.addInstruction([OP_CALL, 2, 2, 1]); |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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159 | mycode.addInstruction([OP_RETURN, 0, 1]); |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
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160 | |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
|
161 | |
253863ece36f
Implement OP_MOVE, OP_LOADNIL and OP_RETURN. Also change the way OP_CALL is implemented, and update the test code with a more complicated (kind of) sample.
Matthew Wild <mwild1@gmail.com>
parents:
1
diff
changeset
|
162 | |
5 | 163 | try{ |
164 | testvm.run(mycode); | |
165 | } | |
166 | catch(e) | |
167 | { | |
168 | print("Error: " + e); | |
169 | } |