aboutsummaryrefslogtreecommitdiff
path: root/src/defs.js
blob: 9eeea0079696b054ae2a0e8a4bf728e504ee6a7a (plain)
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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
"use strict";

const { LUAI_MAXSTACK } = require('./luaconf.js');

/*
 * Fengari specific string conversion functions
 */

let luastring_from;
if (typeof Uint8Array.from === "function") {
    luastring_from = Uint8Array.from.bind(Uint8Array);
} else {
    luastring_from = function(a) {
        let i = 0;
        let len = a.length;
        let r = new Uint8Array(len);
        while (len > i) r[i] = a[i++];
        return r;
    };
}

let luastring_indexOf;
if (typeof (new Uint8Array().indexOf) === "function") {
    luastring_indexOf = function(s, v, i) {
        return s.indexOf(v, i);
    };
} else {
    /* Browsers that don't support Uint8Array.indexOf seem to allow using Array.indexOf on Uint8Array objects e.g. IE11 */
    let array_indexOf = [].indexOf;
    if (array_indexOf.call(new Uint8Array(1), 0) !== 0) throw Error("missing .indexOf");
    luastring_indexOf = function(s, v, i) {
        return array_indexOf.call(s, v, i);
    };
}

let luastring_of;
if (typeof Uint8Array.of === "function") {
    luastring_of = Uint8Array.of.bind(Uint8Array);
} else {
    luastring_of = function() {
        return luastring_from(arguments);
    };
}

const is_luastring = function(s) {
    return s instanceof Uint8Array;
};

/* test two lua strings for equality */
const luastring_eq = function(a, b) {
    if (a !== b) {
        let len = a.length;
        if (len !== b.length) return false;
        /* XXX: Should this be a constant time algorithm? */
        for (let i=0; i<len; i++)
            if (a[i] !== b[i]) return false;
    }
    return true;
};

const to_jsstring = function(value, from, to) {
    if (!is_luastring(value)) throw new TypeError("to_jsstring expects a Uint8Array");

    if (to === void 0) {
        to = value.length;
    } else {
        to = Math.min(value.length, to);
    }

    let str = "";
    for (let i = (from!==void 0?from:0); i < to;) {
        let u0 = value[i++];
        if (u0 < 0x80) {
            /* single byte sequence */
            str += String.fromCharCode(u0);
        } else if (u0 < 0xC2 || u0 > 0xF4) {
            throw RangeError("cannot convert invalid utf8 to javascript string");
        } else if (u0 <= 0xDF) {
            /* two byte sequence */
            if (i >= to) throw RangeError("cannot convert invalid utf8 to javascript string");
            let u1 = value[i++];
            if ((u1&0xC0) !== 0x80) throw RangeError("cannot convert invalid utf8 to javascript string");
            str += String.fromCharCode(((u0 & 0x1F) << 6) + (u1 & 0x3F));
        } else if (u0 <= 0xEF) {
            /* three byte sequence */
            if (i+1 >= to) throw RangeError("cannot convert invalid utf8 to javascript string");
            let u1 = value[i++];
            if ((u1&0xC0) !== 0x80) throw RangeError("cannot convert invalid utf8 to javascript string");
            let u2 = value[i++];
            if ((u2&0xC0) !== 0x80) throw RangeError("cannot convert invalid utf8 to javascript string");
            let u = ((u0 & 0x0F) << 12) + ((u1 & 0x3F) << 6) + (u2 & 0x3F);
            if (u <= 0xFFFF) { /* BMP codepoint */
                str += String.fromCharCode(u);
            } else { /* Astral codepoint */
                u -= 0x10000;
                let s1 = (u >> 10) + 0xD800;
                let s2 = (u % 0x400) + 0xDC00;
                str += String.fromCharCode(s1, s2);
            }
        } else {
            /* four byte sequence */
            if (i+2 >= to) throw RangeError("cannot convert invalid utf8 to javascript string");
            let u1 = value[i++];
            if ((u1&0xC0) !== 0x80) throw RangeError("cannot convert invalid utf8 to javascript string");
            let u2 = value[i++];
            if ((u2&0xC0) !== 0x80) throw RangeError("cannot convert invalid utf8 to javascript string");
            let u3 = value[i++];
            if ((u3&0xC0) !== 0x80) throw RangeError("cannot convert invalid utf8 to javascript string");
            /* Has to be astral codepoint */
            let u = ((u0 & 0x07) << 18) + ((u1 & 0x3F) << 12) + ((u2 & 0x3F) << 6) + (u3 & 0x3F);
            u -= 0x10000;
            let s1 = (u >> 10) + 0xD800;
            let s2 = (u % 0x400) + 0xDC00;
            str += String.fromCharCode(s1, s2);
        }
    }
    return str;
};

/* bytes allowed unescaped in a uri */
const uri_allowed = (";,/?:@&=+$abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789,-_.!~*'()#").split('').reduce(function(uri_allowed, c) {
    uri_allowed[c.charCodeAt(0)] = true;
    return uri_allowed;
}, {});

/* utility function to convert a lua string to a js string with uri escaping */
const to_uristring = function(a) {
    if (!is_luastring(a)) throw new TypeError("to_uristring expects a Uint8Array");
    let s = "";
    for (let i=0; i<a.length; i++) {
        let v = a[i];
        if (uri_allowed[v]) {
            s += String.fromCharCode(v);
        } else {
            s += "%" + (v<0x10?"0":"") + v.toString(16);
        }
    }
    return s;
};

const to_luastring_cache = {};

const to_luastring = function(str, cache) {
    if (typeof str !== "string") throw new TypeError("to_luastring expects a javascript string");

    if (cache) {
        let cached = to_luastring_cache[str];
        if (is_luastring(cached)) return cached;
    }

    let len = str.length;
    let outU8Array = Array(len); /* array is at *least* going to be length of string */
    let outIdx = 0;
    for (let i = 0; i < len; ++i) {
        let u = str.charCodeAt(i);
        if (u <= 0x7F) {
            outU8Array[outIdx++] = u;
        } else if (u <= 0x7FF) {
            outU8Array[outIdx++] = 0xC0 | (u >> 6);
            outU8Array[outIdx++] = 0x80 | (u & 63);
        } else {
            /* This part is to work around possible lack of String.codePointAt */
            if (u >= 0xD800 && u <= 0xDBFF && (i+1) < len) {
                /* is first half of surrogate pair */
                let v = str.charCodeAt(i+1);
                if (v >= 0xDC00 && v <= 0xDFFF) {
                    /* is valid low surrogate */
                    i++;
                    u = (u - 0xD800) * 0x400 + v + 0x2400;
                }
            }
            if (u <= 0xFFFF) {
                outU8Array[outIdx++] = 0xE0 | (u >> 12);
                outU8Array[outIdx++] = 0x80 | ((u >> 6) & 63);
                outU8Array[outIdx++] = 0x80 | (u & 63);
            } else {
                outU8Array[outIdx++] = 0xF0 | (u >> 18);
                outU8Array[outIdx++] = 0x80 | ((u >> 12) & 63);
                outU8Array[outIdx++] = 0x80 | ((u >> 6) & 63);
                outU8Array[outIdx++] = 0x80 | (u & 63);
            }
        }
    }
    outU8Array = luastring_from(outU8Array);

    if (cache) to_luastring_cache[str] = outU8Array;

    return outU8Array;
};

const from_userstring = function(str) {
    if (!is_luastring(str)) throw new TypeError("expects an array of bytes");
    return str;
};

/* mark for precompiled code ('<esc>Lua') */
const LUA_SIGNATURE = to_luastring("\x1bLua");

const LUA_VERSION_MAJOR       = "5";
const LUA_VERSION_MINOR       = "3";
const LUA_VERSION_NUM         = 503;
const LUA_VERSION_RELEASE     = "4";

const LUA_VERSION             = "Lua " + LUA_VERSION_MAJOR + "." + LUA_VERSION_MINOR;
const LUA_RELEASE             = LUA_VERSION + "." + LUA_VERSION_RELEASE;
const LUA_COPYRIGHT           = LUA_RELEASE + "  Copyright (C) 1994-2017 Lua.org, PUC-Rio";
const LUA_AUTHORS             = "R. Ierusalimschy, L. H. de Figueiredo, W. Celes";

const LUA_VERSUFFIX           = "_" + LUA_VERSION_MAJOR + "_" + LUA_VERSION_MINOR;

const LUA_INIT_VAR            = "LUA_INIT";
const LUA_INITVARVERSION      = LUA_INIT_VAR + LUA_VERSUFFIX;

const thread_status = {
    LUA_OK:        0,
    LUA_YIELD:     1,
    LUA_ERRRUN:    2,
    LUA_ERRSYNTAX: 3,
    LUA_ERRMEM:    4,
    LUA_ERRGCMM:   5,
    LUA_ERRERR:    6
};

const constant_types = {
    LUA_TNONE:          -1,
    LUA_TNIL:           0,
    LUA_TBOOLEAN:       1,
    LUA_TLIGHTUSERDATA: 2,
    LUA_TNUMBER:        3,
    LUA_TSTRING:        4,
    LUA_TTABLE:         5,
    LUA_TFUNCTION:      6,
    LUA_TUSERDATA:      7,
    LUA_TTHREAD:        8,
    LUA_NUMTAGS:        9
};

constant_types.LUA_TSHRSTR = constant_types.LUA_TSTRING | (0 << 4);  /* short strings */
constant_types.LUA_TLNGSTR = constant_types.LUA_TSTRING | (1 << 4);  /* long strings */

constant_types.LUA_TNUMFLT = constant_types.LUA_TNUMBER | (0 << 4);  /* float numbers */
constant_types.LUA_TNUMINT = constant_types.LUA_TNUMBER | (1 << 4);  /* integer numbers */

constant_types.LUA_TLCL = constant_types.LUA_TFUNCTION | (0 << 4);  /* Lua closure */
constant_types.LUA_TLCF = constant_types.LUA_TFUNCTION | (1 << 4);  /* light C function */
constant_types.LUA_TCCL = constant_types.LUA_TFUNCTION | (2 << 4);  /* C closure */

/*
** Comparison and arithmetic functions
*/

const LUA_OPADD  = 0;   /* ORDER TM, ORDER OP */
const LUA_OPSUB  = 1;
const LUA_OPMUL  = 2;
const LUA_OPMOD  = 3;
const LUA_OPPOW  = 4;
const LUA_OPDIV  = 5;
const LUA_OPIDIV = 6;
const LUA_OPBAND = 7;
const LUA_OPBOR  = 8;
const LUA_OPBXOR = 9;
const LUA_OPSHL  = 10;
const LUA_OPSHR  = 11;
const LUA_OPUNM  = 12;
const LUA_OPBNOT = 13;

const LUA_OPEQ = 0;
const LUA_OPLT = 1;
const LUA_OPLE = 2;

const LUA_MINSTACK = 20;

const LUA_REGISTRYINDEX = -LUAI_MAXSTACK - 1000;

const lua_upvalueindex = function(i) {
    return LUA_REGISTRYINDEX - i;
};

/* predefined values in the registry */
const LUA_RIDX_MAINTHREAD = 1;
const LUA_RIDX_GLOBALS    = 2;
const LUA_RIDX_LAST       = LUA_RIDX_GLOBALS;

class lua_Debug {
    constructor() {
        this.event = NaN;
        this.name = null;           /* (n) */
        this.namewhat = null;       /* (n) 'global', 'local', 'field', 'method' */
        this.what = null;           /* (S) 'Lua', 'C', 'main', 'tail' */
        this.source = null;         /* (S) */
        this.currentline = NaN;     /* (l) */
        this.linedefined = NaN;     /* (S) */
        this.lastlinedefined = NaN; /* (S) */
        this.nups = NaN;            /* (u) number of upvalues */
        this.nparams = NaN;         /* (u) number of parameters */
        this.isvararg = NaN;        /* (u) */
        this.istailcall = NaN;      /* (t) */
        this.short_src = null;      /* (S) */
        /* private part */
        this.i_ci = null;           /* active function */
    }
}

/*
** Event codes
*/
const LUA_HOOKCALL     = 0;
const LUA_HOOKRET      = 1;
const LUA_HOOKLINE     = 2;
const LUA_HOOKCOUNT    = 3;
const LUA_HOOKTAILCALL = 4;


/*
** Event masks
*/
const LUA_MASKCALL  = (1 << LUA_HOOKCALL);
const LUA_MASKRET   = (1 << LUA_HOOKRET);
const LUA_MASKLINE  = (1 << LUA_HOOKLINE);
const LUA_MASKCOUNT = (1 << LUA_HOOKCOUNT);

/*
** LUA_PATH_SEP is the character that separates templates in a path.
** LUA_PATH_MARK is the string that marks the substitution points in a
** template.
** LUA_EXEC_DIR in a Windows path is replaced by the executable's
** directory.
*/
const LUA_PATH_SEP  = ";";
module.exports.LUA_PATH_SEP = LUA_PATH_SEP;

const LUA_PATH_MARK = "?";
module.exports.LUA_PATH_MARK = LUA_PATH_MARK;

const LUA_EXEC_DIR  = "!";
module.exports.LUA_EXEC_DIR = LUA_EXEC_DIR;


/*
@@ LUA_PATH_DEFAULT is the default path that Lua uses to look for
** Lua libraries.
@@ LUA_CPATH_DEFAULT is the default path that Lua uses to look for
** C libraries.
** CHANGE them if your machine has a non-conventional directory
** hierarchy or if you want to install your libraries in
** non-conventional directories.
*/
const LUA_VDIR = LUA_VERSION_MAJOR + "." + LUA_VERSION_MINOR;
module.exports.LUA_VDIR = LUA_VDIR;

if (typeof process === "undefined") {
    const LUA_DIRSEP = "/";
    module.exports.LUA_DIRSEP = LUA_DIRSEP;

    const LUA_LDIR = "./lua/" + LUA_VDIR + "/";
    module.exports.LUA_LDIR = LUA_LDIR;

    const LUA_CDIR = "./lua/" + LUA_VDIR + "/";
    module.exports.LUA_CDIR = LUA_CDIR;

    const LUA_PATH_DEFAULT =
        LUA_LDIR + "?.lua;" + LUA_LDIR + "?/init.lua;" +
        LUA_CDIR + "?.lua;" + LUA_CDIR + "?/init.lua;" +
        "./?.lua;./?/init.lua";
    module.exports.LUA_PATH_DEFAULT = LUA_PATH_DEFAULT;

    const LUA_CPATH_DEFAULT =
        LUA_CDIR + "?.js;" + LUA_CDIR + "loadall.js;./?.js";
    module.exports.LUA_CPATH_DEFAULT = LUA_CPATH_DEFAULT;
} else if (require('os').platform() === 'win32') {
    const LUA_DIRSEP = "\\";
    module.exports.LUA_DIRSEP = LUA_DIRSEP;

    /*
    ** In Windows, any exclamation mark ('!') in the path is replaced by the
    ** path of the directory of the executable file of the current process.
    */
    const LUA_LDIR = "!\\lua\\";
    module.exports.LUA_LDIR = LUA_LDIR;

    const LUA_CDIR = "!\\";
    module.exports.LUA_CDIR = LUA_CDIR;

    const LUA_SHRDIR = "!\\..\\share\\lua\\" + LUA_VDIR + "\\";
    module.exports.LUA_SHRDIR = LUA_SHRDIR;

    const LUA_PATH_DEFAULT =
        LUA_LDIR + "?.lua;" + LUA_LDIR + "?\\init.lua;" +
        LUA_CDIR + "?.lua;" + LUA_CDIR + "?\\init.lua;" +
        LUA_SHRDIR + "?.lua;" + LUA_SHRDIR + "?\\init.lua;" +
        ".\\?.lua;.\\?\\init.lua";
    module.exports.LUA_PATH_DEFAULT = LUA_PATH_DEFAULT;

    const LUA_CPATH_DEFAULT =
        LUA_CDIR + "?.dll;" +
        LUA_CDIR + "..\\lib\\lua\\" + LUA_VDIR + "\\?.dll;" +
        LUA_CDIR + "loadall.dll;.\\?.dll";
    module.exports.LUA_CPATH_DEFAULT = LUA_CPATH_DEFAULT;
} else {
    const LUA_DIRSEP = "/";
    module.exports.LUA_DIRSEP = LUA_DIRSEP;

    const LUA_ROOT = "/usr/local/";
    module.exports.LUA_ROOT = LUA_ROOT;

    const LUA_LDIR = LUA_ROOT + "share/lua/" + LUA_VDIR + "/";
    module.exports.LUA_LDIR = LUA_LDIR;

    const LUA_CDIR = LUA_ROOT + "lib/lua/" + LUA_VDIR + "/";
    module.exports.LUA_CDIR = LUA_CDIR;

    const LUA_PATH_DEFAULT =
        LUA_LDIR + "?.lua;" + LUA_LDIR + "?/init.lua;" +
        LUA_CDIR + "?.lua;" + LUA_CDIR + "?/init.lua;" +
        "./?.lua;./?/init.lua";
    module.exports.LUA_PATH_DEFAULT = LUA_PATH_DEFAULT;

    const LUA_CPATH_DEFAULT =
        LUA_CDIR + "?.so;" + LUA_CDIR + "loadall.so;./?.so";
    module.exports.LUA_CPATH_DEFAULT = LUA_CPATH_DEFAULT;
}

module.exports.LUA_AUTHORS             = LUA_AUTHORS;
module.exports.LUA_COPYRIGHT           = LUA_COPYRIGHT;
module.exports.LUA_HOOKCALL            = LUA_HOOKCALL;
module.exports.LUA_HOOKCOUNT           = LUA_HOOKCOUNT;
module.exports.LUA_HOOKLINE            = LUA_HOOKLINE;
module.exports.LUA_HOOKRET             = LUA_HOOKRET;
module.exports.LUA_HOOKTAILCALL        = LUA_HOOKTAILCALL;
module.exports.LUA_INITVARVERSION      = LUA_INITVARVERSION;
module.exports.LUA_INIT_VAR            = LUA_INIT_VAR;
module.exports.LUA_MASKCALL            = LUA_MASKCALL;
module.exports.LUA_MASKCOUNT           = LUA_MASKCOUNT;
module.exports.LUA_MASKLINE            = LUA_MASKLINE;
module.exports.LUA_MASKRET             = LUA_MASKRET;
module.exports.LUA_MINSTACK            = LUA_MINSTACK;
module.exports.LUA_MULTRET             = -1;
module.exports.LUA_OPADD               = LUA_OPADD;
module.exports.LUA_OPBAND              = LUA_OPBAND;
module.exports.LUA_OPBNOT              = LUA_OPBNOT;
module.exports.LUA_OPBOR               = LUA_OPBOR;
module.exports.LUA_OPBXOR              = LUA_OPBXOR;
module.exports.LUA_OPDIV               = LUA_OPDIV;
module.exports.LUA_OPEQ                = LUA_OPEQ;
module.exports.LUA_OPIDIV              = LUA_OPIDIV;
module.exports.LUA_OPLE                = LUA_OPLE;
module.exports.LUA_OPLT                = LUA_OPLT;
module.exports.LUA_OPMOD               = LUA_OPMOD;
module.exports.LUA_OPMUL               = LUA_OPMUL;
module.exports.LUA_OPPOW               = LUA_OPPOW;
module.exports.LUA_OPSHL               = LUA_OPSHL;
module.exports.LUA_OPSHR               = LUA_OPSHR;
module.exports.LUA_OPSUB               = LUA_OPSUB;
module.exports.LUA_OPUNM               = LUA_OPUNM;
module.exports.LUA_REGISTRYINDEX       = LUA_REGISTRYINDEX;
module.exports.LUA_RELEASE             = LUA_RELEASE;
module.exports.LUA_RIDX_GLOBALS        = LUA_RIDX_GLOBALS;
module.exports.LUA_RIDX_LAST           = LUA_RIDX_LAST;
module.exports.LUA_RIDX_MAINTHREAD     = LUA_RIDX_MAINTHREAD;
module.exports.LUA_SIGNATURE           = LUA_SIGNATURE;
module.exports.LUA_VERSION             = LUA_VERSION;
module.exports.LUA_VERSION_MAJOR       = LUA_VERSION_MAJOR;
module.exports.LUA_VERSION_MINOR       = LUA_VERSION_MINOR;
module.exports.LUA_VERSION_NUM         = LUA_VERSION_NUM;
module.exports.LUA_VERSION_RELEASE     = LUA_VERSION_RELEASE;
module.exports.LUA_VERSUFFIX           = LUA_VERSUFFIX;
module.exports.constant_types          = constant_types;
module.exports.lua_Debug               = lua_Debug;
module.exports.lua_upvalueindex        = lua_upvalueindex;
module.exports.thread_status           = thread_status;
module.exports.is_luastring            = is_luastring;
module.exports.luastring_eq            = luastring_eq;
module.exports.luastring_from          = luastring_from;
module.exports.luastring_indexOf       = luastring_indexOf;
module.exports.luastring_of            = luastring_of;
module.exports.to_jsstring             = to_jsstring;
module.exports.to_luastring            = to_luastring;
module.exports.to_uristring            = to_uristring;
module.exports.from_userstring         = from_userstring;