libcycript.cy

   1 /* Cycript - The Truly Universal Scripting Language
   2  * Copyright (C) 2009-2016  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU Affero General Public License, Version 3 {{{ */
   6 /*
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 var process = {
  23     env: {},
  24 };
  25
  26 (function() {
  27
  28 this.typeid = function(object) {
  29     return object.$cyt;
  30 };
  31
  32 let $cy_set = function(object, properties) {
  33     for (const name in properties)
  34         Object.defineProperty(object, name, {
  35             configurable: true,
  36             enumerable: false,
  37             writable: true,
  38             value: properties[name],
  39         });
  40 };
  41
  42 $cy_set(Boolean.prototype, {
  43     toCYON: function() {
  44         return `new Boolean(${this.toString()})`;
  45     },
  46 });
  47
  48 $cy_set(Date.prototype, {
  49     toCYON: function() {
  50         return `new ${this.constructor.name}(${this.toUTCString().toCYON()})`;
  51     },
  52 });
  53
  54 $cy_set(Error.prototype, {
  55     toCYON: function() {
  56         let stack = this.stack;
  57         if (typeof stack == 'undefined')
  58             stack = '';
  59         else {
  60             stack = stack.split('\n');
  61             if (stack.slice(-1)[0] == "global code")
  62                 stack = stack.slice(0, -1);
  63             for (let i = 0; i != stack.length; ++i)
  64                 stack[i] = '\n    ' + stack[i];
  65             stack = stack.join('');
  66             stack = ` /*${stack} */`;
  67         }
  68         return `new ${this.constructor.name}(${this.message.toCYON()})${stack}`;
  69     },
  70 });
  71
  72 $cy_set(Number.prototype, {
  73     toCYON: function() {
  74         if ("$cyt" in this)
  75             return `${this.$cyt.toCYON()}(${this.toString()})`;
  76         return `new Number(${this.toString()})`;
  77     },
  78 });
  79
  80 $cy_set(RegExp.prototype, {
  81     toCYON: function() {
  82         return this.toString();
  83     },
  84 });
  85
  86 // XXX: Java should just always be available
  87 if ("Java" in Cycript) {
  88
  89 // XXX: this is a half-assed EventEmitter
  90 // XXX: this doesn't even have the same semantics
  91
  92 Java.handlers_ = {};
  93
  94 Java.on = function(event, handler) {
  95     var handlers;
  96     if (event in this.handlers_)
  97         handlers = this.handlers_[event];
  98     else {
  99         handlers = [];
 100         this.handlers_[event] = handlers;
 101     }
 102
 103     if (this.handlers_ == null)
 104         handler();
 105     else
 106         handlers.push(handler);
 107 };
 108
 109 Java.emit = function(event) {
 110     if (event in this.handlers_) {
 111         var handlers = this.handlers_[event];
 112         if (handlers != null)
 113             for (var handler of handlers)
 114                 handler();
 115     }
 116
 117     this.handlers_[event] = null;
 118 };
 119
 120 Java.on('setup', function() {
 121     $cy_set(java.lang.Boolean.prototype, {
 122         toCYON: function() {
 123             return `new java.lang.Boolean(${this->value})`;
 124         },
 125     });
 126
 127     $cy_set(java.lang.Byte.prototype, {
 128         toCYON: function() {
 129             return `new java.lang.Byte(${this->value})`;
 130         },
 131     });
 132
 133     $cy_set(java.lang.Character.prototype, {
 134         toCYON: function() {
 135             return `new java.lang.Character(${this->value})`;
 136         },
 137     });
 138
 139     $cy_set(java.lang.Short.prototype, {
 140         toCYON: function() {
 141             return `new java.lang.Short(${this->value})`;
 142         },
 143     });
 144
 145     $cy_set(java.lang.Integer.prototype, {
 146         toCYON: function() {
 147             return `new java.lang.Integer(${this->value})`;
 148         },
 149     });
 150
 151     $cy_set(java.lang.Long.prototype, {
 152         toCYON: function() {
 153             return `new java.lang.Long(${this->value})`;
 154         },
 155     });
 156
 157     $cy_set(java.lang.Float.prototype, {
 158         toCYON: function() {
 159             return `new java.lang.Float(${this->value})`;
 160         },
 161     });
 162
 163     $cy_set(java.lang.Double.prototype, {
 164         toCYON: function() {
 165             return `new java.lang.Double(${this->value})`;
 166         },
 167     });
 168
 169     $cy_set(java.lang.Object.prototype, {
 170         toCYON: function(key) {
 171             return "#" + this.toString().toCYON();
 172         },
 173
 174         // XXX: due to lack of interface prototypes :(
 175         $cyg: function(key) {
 176             return this.get(key);
 177         },
 178
 179         // XXX: due to lack of interface prototypes :(
 180         $cys: function(key, value) {
 181             if ("set" in this)
 182                 this.set(key, value);
 183             else
 184                 this.put(key, value);
 185         },
 186     });
 187 });
 188
 189 }
 190
 191 if ("ObjectiveC" in Cycript) {
 192     $cy_set(NSArray.prototype, {
 193         $cyg: function(key) {
 194             return objc_msgSend(this, "objectAtIndex:", key);
 195         },
 196
 197         $cys: function(key, value) {
 198             return objc_msgSend(this, "setObject:atIndex:", value, key);
 199         },
 200     });
 201
 202     $cy_set(NSDictionary.prototype, {
 203         $cyg: function(key) {
 204             return objc_msgSend(this, "objectForKey:", key);
 205         },
 206
 207         $cys: function(key, value) {
 208             return objc_msgSend(this, "setObject:forKey:", value, key);
 209         },
 210     });
 211 }
 212
 213 let IsFile = function(path) {
 214     // XXX: this doesn't work on symlinks, but I don't want to fix stat :/
 215     return access(path, F_OK) == 0 && access(path + '/', F_OK) == -1;
 216 };
 217
 218 let StartsWith = function(lhs, rhs) {
 219     return lhs.substring(0, rhs.length) == rhs;
 220 };
 221
 222 let ResolveFile = function(exact, name) {
 223     if (exact && IsFile(name))
 224         return name;
 225     for (let suffix of ['.js', '.json'])
 226         if (IsFile(name + suffix))
 227             return name + suffix;
 228     return null;
 229 };
 230
 231
 232 let GetLibraryPath = function() {
 233     let handle = dlopen("/usr/lib/libcycript.dylib", RTLD_NOLOAD);
 234     if (handle == null)
 235         return null;
 236
 237     try {
 238         let CYHandleServer = dlsym(handle, "CYHandleServer");
 239         if (CYHandleServer == null)
 240             return null;
 241
 242         let info = new Dl_info;
 243         if (dladdr(CYHandleServer, info) == 0)
 244             return null;
 245
 246         let path = info->dli_fname;
 247         let slash = path.lastIndexOf('/');
 248         if (slash == -1)
 249             return null;
 250
 251         path = path.substr(0, slash);
 252
 253         GetLibraryPath = function() {
 254             return path;
 255         };
 256
 257         return GetLibraryPath();
 258     } finally {
 259         dlclose(handle);
 260     }
 261 };
 262
 263 let ResolveFolder = function(name) {
 264     if (access(name + '/', F_OK) == -1)
 265         return null;
 266
 267     if (IsFile(name + "/package.json")) {
 268         let package = require(name + "/package.json");
 269         let path = ResolveFile(true, name + "/" + package.main);
 270         if (path != null)
 271             return path;
 272     }
 273
 274     return ResolveFile(false, name + "/index");
 275 };
 276
 277 let ResolveEither = function(name) {
 278     let path = null;
 279     if (path == null)
 280         path = ResolveFile(true, name);
 281     if (path == null)
 282         path = ResolveFolder(name);
 283     return path;
 284 };
 285
 286 require.resolve = function(name) {
 287     if (StartsWith(name, '/')) {
 288         let path = ResolveEither(name);
 289         if (path != null)
 290             return path;
 291     } else {
 292         let cwd = new (typedef char[1024]);
 293         cwd = getcwd(cwd, cwd.length).toString();
 294         cwd = cwd.split('/');
 295
 296         if (StartsWith(name, './') || StartsWith(name, '../')) {
 297             let path = ResolveEither(cwd + '/' + name);
 298             if (path != null)
 299                 return path;
 300         } else {
 301             for (let i = cwd.length; i != 0; --i) {
 302                 let modules = cwd.slice(0, i).concat("node_modules").join('/');
 303                 let path = ResolveEither(modules + "/" + name);
 304                 if (path != null)
 305                     return path;
 306             }
 307
 308             let library = GetLibraryPath();
 309             let path = ResolveFile(true, library + "/cycript0.9/" + name + ".cy");
 310             if (path != null)
 311                 return path;
 312         }
 313     }
 314
 315     throw new Error("Cannot find module '" + name + "'");
 316 };
 317
 318 var _syscall = function(value) {
 319     if (value == -1)
 320         throw new Error(strerror(errno));
 321 };
 322
 323 var info = *new (struct stat);
 324 if (false) {
 325 } else if ("st_atim" in info) {
 326     var st_atime = "st_atim";
 327     var st_mtime = "st_mtim";
 328     var st_ctime = "st_ctim";
 329 } else if ("st_atimespec" in info) {
 330     var st_atime = "st_atimespec";
 331     var st_mtime = "st_mtimespec";
 332     var st_ctime = "st_ctimespec";
 333 } else {
 334     var st_atime = "st_atime";
 335     var st_mtime = "st_mtime";
 336     var st_ctime = "st_ctime";
 337 }
 338
 339 var toDate = function(timespec) {
 340     return new Date(timespec.tv_sec * 1000 + timespec.tv_nsec / 1000);
 341 };
 342
 343 var bindings = {};
 344
 345 process.binding = function(name) {
 346     let binding = bindings[name];
 347     if (typeof binding != 'undefined')
 348         return binding;
 349
 350     switch (name) {
 351         case 'buffer': binding = {
 352             setupBufferJS() {
 353             },
 354         }; break;
 355
 356         case 'cares_wrap': binding = {
 357         }; break;
 358
 359         case 'constants': binding = {
 360         }; break;
 361
 362         case 'fs': binding = {
 363             FSInitialize() {
 364             },
 365
 366             lstat(path) {
 367                 var info = new (struct stat);
 368                 _syscall(lstat(path, info));
 369
 370                 return {
 371                     dev: info->st_dev,
 372                     mode: info->st_mode,
 373                     nlink: info->st_nlink,
 374                     uid: info->st_uid,
 375                     gid: info->st_gid,
 376                     rdev: info->st_rdev,
 377                     blksize: info->st_blksize,
 378                     ino: info->st_ino,
 379                     size: info->st_size,
 380                     blocks: info->st_blocks,
 381
 382                     atime: toDate(info->[st_atime]),
 383                     mtime: toDate(info->[st_mtime]),
 384                     ctime: toDate(info->[st_ctime]),
 385
 386                     isSymbolicLink() {
 387                         return S_ISLNK(this.mode);
 388                     },
 389                 };
 390             },
 391         }; break;
 392
 393         case 'pipe_wrap': binding = {
 394         }; break;
 395
 396         case 'smalloc': binding = {
 397             alloc() {
 398             },
 399         }; break;
 400
 401         case 'stream_wrap': binding = {
 402         }; break;
 403
 404         case 'tcp_wrap': binding = {
 405         }; break;
 406
 407         case 'timer_wrap': binding = {
 408             kOnTimeout: 0,
 409             Timer: {
 410             },
 411         }; break;
 412
 413         case 'tty_wrap': binding = {
 414         }; break;
 415
 416         case 'uv': binding = {
 417         }; break;
 418
 419         default:
 420             throw new Error('No such module: ' + name);
 421     }
 422
 423     bindings[name] = binding;
 424     return binding;
 425 };
 426
 427 let environ = *(typedef char ***)(dlsym(RTLD_DEFAULT, "environ"));
 428 for (let i = 0; environ[i] != null; ++i) {
 429     let assign = environ[i];
 430     let equal = assign.indexOf('=');
 431     let name = assign.substr(0, equal);
 432     let value = assign.substr(equal + 1);
 433     process.env[name.toString()] = value;
 434 }
 435
 436 process.cwd = function() {
 437     let cwd = new (typedef char[1024]);
 438     return getcwd(cwd, cwd.length).toString();
 439 };
 440
 441 process.pid = getpid();
 442
 443 })();