libcycript.cy

   1 /* Cycript - Optimizing JavaScript Compiler/Runtime
   2  * Copyright (C) 2009-2015  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 if ("Java" in Cycript) {
  87     $cy_set(java.lang.Boolean.prototype, {
  88         toCYON: function() {
  89             return `new java.lang.Boolean(${this->value})`;
  90         },
  91     });
  92
  93     $cy_set(java.lang.Byte.prototype, {
  94         toCYON: function() {
  95             return `new java.lang.Byte(${this->value})`;
  96         },
  97     });
  98
  99     $cy_set(java.lang.Character.prototype, {
 100         toCYON: function() {
 101             return `new java.lang.Character(${this->value})`;
 102         },
 103     });
 104
 105     $cy_set(java.lang.Short.prototype, {
 106         toCYON: function() {
 107             return `new java.lang.Short(${this->value})`;
 108         },
 109     });
 110
 111     $cy_set(java.lang.Integer.prototype, {
 112         toCYON: function() {
 113             return `new java.lang.Integer(${this->value})`;
 114         },
 115     });
 116
 117     $cy_set(java.lang.Long.prototype, {
 118         toCYON: function() {
 119             return `new java.lang.Long(${this->value})`;
 120         },
 121     });
 122
 123     $cy_set(java.lang.Float.prototype, {
 124         toCYON: function() {
 125             return `new java.lang.Float(${this->value})`;
 126         },
 127     });
 128
 129     $cy_set(java.lang.Double.prototype, {
 130         toCYON: function() {
 131             return `new java.lang.Double(${this->value})`;
 132         },
 133     });
 134
 135     $cy_set(java.lang.Object.prototype, {
 136         // XXX: due to lack of interface prototypes :(
 137         $cyg: function(key) {
 138             return this.get(key);
 139         },
 140
 141         // XXX: due to lack of interface prototypes :(
 142         $cys: function(key, value) {
 143             if ("set" in this)
 144                 this.set(key, value);
 145             else
 146                 this.put(key, value);
 147         },
 148     });
 149 }
 150
 151 if ("ObjectiveC" in Cycript) {
 152     $cy_set(NSArray.prototype, {
 153         $cyg: function(key) {
 154             return objc_msgSend(this, "objectAtIndex:", key);
 155         },
 156
 157         $cys: function(key, value) {
 158             return objc_msgSend(this, "setObject:atIndex:", value, key);
 159         },
 160     });
 161
 162     $cy_set(NSDictionary.prototype, {
 163         $cyg: function(key) {
 164             return objc_msgSend(this, "objectForKey:", key);
 165         },
 166
 167         $cys: function(key, value) {
 168             return objc_msgSend(this, "setObject:forKey:", value, key);
 169         },
 170     });
 171 }
 172
 173 let IsFile = function(path) {
 174     // XXX: this doesn't work on symlinks, but I don't want to fix stat :/
 175     return access(path, F_OK) == 0 && access(path + '/', F_OK) == -1;
 176 };
 177
 178 let StartsWith = function(lhs, rhs) {
 179     return lhs.substring(0, rhs.length) == rhs;
 180 };
 181
 182 let ResolveFile = function(exact, name) {
 183     if (exact && IsFile(name))
 184         return name;
 185     for (let suffix of ['.js', '.json'])
 186         if (IsFile(name + suffix))
 187             return name + suffix;
 188     return null;
 189 };
 190
 191
 192 let GetLibraryPath = function() {
 193     let handle = dlopen("/usr/lib/libcycript.dylib", RTLD_NOLOAD);
 194     if (handle == null)
 195         return null;
 196
 197     try {
 198         let CYHandleServer = dlsym(handle, "CYHandleServer");
 199         if (CYHandleServer == null)
 200             return null;
 201
 202         let info = new Dl_info;
 203         if (dladdr(CYHandleServer, info) == 0)
 204             return null;
 205
 206         let path = info->dli_fname;
 207         let slash = path.lastIndexOf('/');
 208         if (slash == -1)
 209             return null;
 210
 211         path = path.substr(0, slash);
 212
 213         GetLibraryPath = function() {
 214             return path;
 215         };
 216
 217         return GetLibraryPath();
 218     } finally {
 219         dlclose(handle);
 220     }
 221 };
 222
 223 let ResolveFolder = function(name) {
 224     if (access(name + '/', F_OK) == -1)
 225         return null;
 226
 227     if (IsFile(name + "/package.json")) {
 228         let package = require(name + "/package.json");
 229         let path = ResolveFile(true, name + "/" + package.main);
 230         if (path != null)
 231             return path;
 232     }
 233
 234     return ResolveFile(false, name + "/index");
 235 };
 236
 237 let ResolveEither = function(name) {
 238     let path = null;
 239     if (path == null)
 240         path = ResolveFile(true, name);
 241     if (path == null)
 242         path = ResolveFolder(name);
 243     return path;
 244 };
 245
 246 require.resolve = function(name) {
 247     if (StartsWith(name, '/')) {
 248         let path = ResolveEither(name);
 249         if (path != null)
 250             return path;
 251     } else {
 252         let cwd = new (typedef char[1024]);
 253         cwd = getcwd(cwd, cwd.length).toString();
 254         cwd = cwd.split('/');
 255
 256         if (StartsWith(name, './') || StartsWith(name, '../')) {
 257             let path = ResolveEither(cwd + '/' + name);
 258             if (path != null)
 259                 return path;
 260         } else {
 261             for (let i = cwd.length; i != 0; --i) {
 262                 let modules = cwd.slice(0, i).concat("node_modules").join('/');
 263                 let path = ResolveEither(modules + "/" + name);
 264                 if (path != null)
 265                     return path;
 266             }
 267
 268             let library = GetLibraryPath();
 269             let path = ResolveFile(true, library + "/cycript0.9/" + name + ".cy");
 270             if (path != null)
 271                 return path;
 272         }
 273     }
 274
 275     throw new Error("Cannot find module '" + name + "'");
 276 };
 277
 278 var _syscall = function(value) {
 279     if (value == -1)
 280         throw new Error(strerror(errno));
 281 };
 282
 283 var info = *new (struct stat);
 284 if (false) {
 285 } else if ("st_atim" in info) {
 286     var st_atime = "st_atim";
 287     var st_mtime = "st_mtim";
 288     var st_ctime = "st_ctim";
 289 } else if ("st_atimespec" in info) {
 290     var st_atime = "st_atimespec";
 291     var st_mtime = "st_mtimespec";
 292     var st_ctime = "st_ctimespec";
 293 } else {
 294     var st_atime = "st_atime";
 295     var st_mtime = "st_mtime";
 296     var st_ctime = "st_ctime";
 297 }
 298
 299 var toDate = function(timespec) {
 300     return new Date(timespec.tv_sec * 1000 + timespec.tv_nsec / 1000);
 301 };
 302
 303 var bindings = {};
 304
 305 process.binding = function(name) {
 306     let binding = bindings[name];
 307     if (typeof binding != 'undefined')
 308         return binding;
 309
 310     switch (name) {
 311         case 'buffer': binding = {
 312             setupBufferJS() {
 313             },
 314         }; break;
 315
 316         case 'cares_wrap': binding = {
 317         }; break;
 318
 319         case 'constants': binding = {
 320         }; break;
 321
 322         case 'fs': binding = {
 323             FSInitialize() {
 324             },
 325
 326             lstat(path) {
 327                 var info = new (struct stat);
 328                 _syscall(lstat(path, info));
 329
 330                 return {
 331                     dev: info->st_dev,
 332                     mode: info->st_mode,
 333                     nlink: info->st_nlink,
 334                     uid: info->st_uid,
 335                     gid: info->st_gid,
 336                     rdev: info->st_rdev,
 337                     blksize: info->st_blksize,
 338                     ino: info->st_ino,
 339                     size: info->st_size,
 340                     blocks: info->st_blocks,
 341
 342                     atime: toDate(info->[st_atime]),
 343                     mtime: toDate(info->[st_mtime]),
 344                     ctime: toDate(info->[st_ctime]),
 345
 346                     isSymbolicLink() {
 347                         return S_ISLNK(this.mode);
 348                     },
 349                 };
 350             },
 351         }; break;
 352
 353         case 'pipe_wrap': binding = {
 354         }; break;
 355
 356         case 'smalloc': binding = {
 357             alloc() {
 358             },
 359         }; break;
 360
 361         case 'stream_wrap': binding = {
 362         }; break;
 363
 364         case 'tcp_wrap': binding = {
 365         }; break;
 366
 367         case 'timer_wrap': binding = {
 368             kOnTimeout: 0,
 369             Timer: {
 370             },
 371         }; break;
 372
 373         case 'tty_wrap': binding = {
 374         }; break;
 375
 376         case 'uv': binding = {
 377         }; break;
 378
 379         default:
 380             throw new Error('No such module: ' + name);
 381     }
 382
 383     bindings[name] = binding;
 384     return binding;
 385 };
 386
 387 let environ = *(typedef char ***)(dlsym(RTLD_DEFAULT, "environ"));
 388 for (let i = 0; environ[i] != null; ++i) {
 389     let assign = environ[i];
 390     let equal = assign.indexOf('=');
 391     let name = assign.substr(0, equal);
 392     let value = assign.substr(equal + 1);
 393     process.env[name.toString()] = value;
 394 }
 395
 396 process.pid = getpid();
 397
 398 })();