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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
"use strict";
const defs = require('./defs.js');
const CT = defs.constant_types;
const LUAC_DATA = defs.luastring_of(25, 147, 13, 10, 26, 10);
const LUAC_INT = 0x5678;
const LUAC_NUM = 370.5;
const LUAC_VERSION = Number(defs.LUA_VERSION_MAJOR) * 16 + Number(defs.LUA_VERSION_MINOR);
const LUAC_FORMAT = 0; /* this is the official format */
class DumpState {
constructor() {
this.L = null;
this.write = null;
this.data = null;
this.strip = NaN;
this.status = NaN;
}
}
const DumpBlock = function(b, size, D) {
if (D.status === 0 && size > 0)
D.status = D.writer(D.L, b, size, D.data);
};
const DumpLiteral = function(s, D) {
s = defs.to_luastring(s);
DumpBlock(s, s.length, D);
};
const DumpByte = function(y, D) {
DumpBlock(defs.luastring_of(y), 1, D);
};
const DumpInt = function(x, D) {
let ab = new ArrayBuffer(4);
let dv = new DataView(ab);
dv.setInt32(0, x, true);
let t = new Uint8Array(ab);
DumpBlock(t, 4, D);
};
const DumpInteger = function(x, D) {
let ab = new ArrayBuffer(4);
let dv = new DataView(ab);
dv.setInt32(0, x, true);
let t = new Uint8Array(ab);
DumpBlock(t, 4, D);
};
const DumpNumber = function(x, D) {
let ab = new ArrayBuffer(8);
let dv = new DataView(ab);
dv.setFloat64(0, x, true);
let t = new Uint8Array(ab);
DumpBlock(t, 8, D);
};
const DumpString = function(s, D) {
if (s === null)
DumpByte(0, D);
else {
let size = s.tsslen() + 1;
let str = s.getstr();
if (size < 0xFF)
DumpByte(size, D);
else {
DumpByte(0xFF, D);
DumpInteger(size, D);
}
DumpBlock(str, size - 1, D); /* no need to save '\0' */
}
};
const DumpCode = function(f, D) {
let s = f.code.map(e => e.code);
DumpInt(s.length, D);
for (let i = 0; i < s.length; i++)
DumpInt(s[i], D);
};
const DumpConstants = function(f, D) {
let n = f.k.length;
DumpInt(n, D);
for (let i = 0; i < n; i++) {
let o = f.k[i];
DumpByte(o.ttype(), D);
switch (o.ttype()) {
case CT.LUA_TNIL:
break;
case CT.LUA_TBOOLEAN:
DumpByte(o.value ? 1 : 0, D);
break;
case CT.LUA_TNUMFLT:
DumpNumber(o.value, D);
break;
case CT.LUA_TNUMINT:
DumpInteger(o.value, D);
break;
case CT.LUA_TSHRSTR:
case CT.LUA_TLNGSTR:
DumpString(o.tsvalue(), D);
break;
}
}
};
const DumpProtos = function(f, D) {
let n = f.p.length;
DumpInt(n, D);
for (let i = 0; i < n; i++)
DumpFunction(f.p[i], f.source, D);
};
const DumpUpvalues = function(f, D) {
let n = f.upvalues.length;
DumpInt(n, D);
for (let i = 0; i < n; i++) {
DumpByte(f.upvalues[i].instack ? 1 : 0, D);
DumpByte(f.upvalues[i].idx, D);
}
};
const DumpDebug = function(f, D) {
let n = D.strip ? 0 : f.lineinfo.length;
DumpInt(n, D);
for (let i = 0; i < n; i++)
DumpInt(f.lineinfo[i], D);
n = D.strip ? 0 : f.locvars.length;
DumpInt(n, D);
for (let i = 0; i < n; i++) {
DumpString(f.locvars[i].varname, D);
DumpInt(f.locvars[i].startpc, D);
DumpInt(f.locvars[i].endpc, D);
}
n = D.strip ? 0 : f.upvalues.length;
DumpInt(n, D);
for (let i = 0; i < n; i++)
DumpString(f.upvalues[i].name, D);
};
const DumpFunction = function(f, psource, D) {
if (D.strip || f.source === psource)
DumpString(null, D); /* no debug info or same source as its parent */
else
DumpString(f.source, D);
DumpInt(f.linedefined, D);
DumpInt(f.lastlinedefined, D);
DumpByte(f.numparams, D);
DumpByte(f.is_vararg?1:0, D);
DumpByte(f.maxstacksize, D);
DumpCode(f, D);
DumpConstants(f, D);
DumpUpvalues(f, D);
DumpProtos(f, D);
DumpDebug(f, D);
};
const DumpHeader = function(D) {
DumpLiteral(defs.LUA_SIGNATURE, D);
DumpByte(LUAC_VERSION, D);
DumpByte(LUAC_FORMAT, D);
DumpBlock(LUAC_DATA, LUAC_DATA.length, D);
DumpByte(4, D); // intSize
DumpByte(4, D); // size_tSize
DumpByte(4, D); // instructionSize
DumpByte(4, D); // integerSize
DumpByte(8, D); // numberSize
DumpInteger(LUAC_INT, D);
DumpNumber(LUAC_NUM, D);
};
/*
** dump Lua function as precompiled chunk
*/
const luaU_dump = function(L, f, w, data, strip) {
let D = new DumpState();
D.L = L;
D.writer = w;
D.data = data;
D.strip = strip;
D.status = 0;
DumpHeader(D);
DumpByte(f.upvalues.length, D);
DumpFunction(f, null, D);
return D.status;
};
module.exports.luaU_dump = luaU_dump;
|
