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
 136 let IsFile = function(path) {
 137     // XXX: this doesn't work on symlinks, but I don't want to fix stat :/
 138     return access(path, F_OK) == 0 && access(path + '/', F_OK) == -1;
 139 };
 140
 141 let StartsWith = function(lhs, rhs) {
 142     return lhs.substring(0, rhs.length) == rhs;
 143 };
 144
 145 let ResolveFile = function(exact, name) {
 146     if (exact && IsFile(name))
 147         return name;
 148     for (let suffix of ['.js', '.json'])
 149         if (IsFile(name + suffix))
 150             return name + suffix;
 151     return null;
 152 };
 153
 154
 155 let GetLibraryPath = function() {
 156     let handle = dlopen("/usr/lib/libcycript.dylib", RTLD_NOLOAD);
 157     if (handle == null)
 158         return null;
 159
 160     try {
 161         let CYHandleServer = dlsym(handle, "CYHandleServer");
 162         if (CYHandleServer == null)
 163             return null;
 164
 165         let info = new Dl_info;
 166         if (dladdr(CYHandleServer, info) == 0)
 167             return null;
 168
 169         let path = info->dli_fname;
 170         let slash = path.lastIndexOf('/');
 171         if (slash == -1)
 172             return null;
 173
 174         path = path.substr(0, slash);
 175
 176         GetLibraryPath = function() {
 177             return path;
 178         };
 179
 180         return GetLibraryPath();
 181     } finally {
 182         dlclose(handle);
 183     }
 184 };
 185
 186 let ResolveFolder = function(name) {
 187     if (access(name + '/', F_OK) == -1)
 188         return null;
 189
 190     if (IsFile(name + "/package.json")) {
 191         let package = require(name + "/package.json");
 192         let path = ResolveFile(true, name + "/" + package.main);
 193         if (path != null)
 194             return path;
 195     }
 196
 197     return ResolveFile(false, name + "/index");
 198 };
 199
 200 let ResolveEither = function(name) {
 201     let path = null;
 202     if (path == null)
 203         path = ResolveFile(true, name);
 204     if (path == null)
 205         path = ResolveFolder(name);
 206     return path;
 207 };
 208
 209 require.resolve = function(name) {
 210     if (StartsWith(name, '/')) {
 211         let path = ResolveEither(name);
 212         if (path != null)
 213             return path;
 214     } else {
 215         let cwd = new (typedef char[1024]);
 216         cwd = getcwd(cwd, cwd.length).toString();
 217         cwd = cwd.split('/');
 218
 219         if (StartsWith(name, './') || StartsWith(name, '../')) {
 220             let path = ResolveEither(cwd + '/' + name);
 221             if (path != null)
 222                 return path;
 223         } else {
 224             for (let i = cwd.length; i != 0; --i) {
 225                 let modules = cwd.slice(0, i).concat("node_modules").join('/');
 226                 let path = ResolveEither(modules + "/" + name);
 227                 if (path != null)
 228                     return path;
 229             }
 230
 231             let library = GetLibraryPath();
 232             let path = ResolveFile(true, library + "/cycript0.9/" + name + ".cy");
 233             if (path != null)
 234                 return path;
 235         }
 236     }
 237
 238     throw new Error("Cannot find module '" + name + "'");
 239 };
 240
 241 var _syscall = function(value) {
 242     if (value == -1)
 243         throw new Error(strerror(errno));
 244 };
 245
 246 var info = *new (struct stat);
 247 if (false) {
 248 } else if ("st_atim" in info) {
 249     var st_atime = "st_atim";
 250     var st_mtime = "st_mtim";
 251     var st_ctime = "st_ctim";
 252 } else if ("st_atimespec" in info) {
 253     var st_atime = "st_atimespec";
 254     var st_mtime = "st_mtimespec";
 255     var st_ctime = "st_ctimespec";
 256 } else {
 257     var st_atime = "st_atime";
 258     var st_mtime = "st_mtime";
 259     var st_ctime = "st_ctime";
 260 }
 261
 262 var toDate = function(timespec) {
 263     return new Date(timespec.tv_sec * 1000 + timespec.tv_nsec / 1000);
 264 };
 265
 266 var bindings = {};
 267
 268 process.binding = function(name) {
 269     let binding = bindings[name];
 270     if (typeof binding != 'undefined')
 271         return binding;
 272
 273     switch (name) {
 274         case 'buffer': binding = {
 275             setupBufferJS() {
 276             },
 277         }; break;
 278
 279         case 'cares_wrap': binding = {
 280         }; break;
 281
 282         case 'constants': binding = {
 283         }; break;
 284
 285         case 'fs': binding = {
 286             FSInitialize() {
 287             },
 288
 289             lstat(path) {
 290                 var info = new (struct stat);
 291                 _syscall(lstat(path, info));
 292
 293                 return {
 294                     dev: info->st_dev,
 295                     mode: info->st_mode,
 296                     nlink: info->st_nlink,
 297                     uid: info->st_uid,
 298                     gid: info->st_gid,
 299                     rdev: info->st_rdev,
 300                     blksize: info->st_blksize,
 301                     ino: info->st_ino,
 302                     size: info->st_size,
 303                     blocks: info->st_blocks,
 304
 305                     atime: toDate(info->[st_atime]),
 306                     mtime: toDate(info->[st_mtime]),
 307                     ctime: toDate(info->[st_ctime]),
 308
 309                     isSymbolicLink() {
 310                         return S_ISLNK(this.mode);
 311                     },
 312                 };
 313             },
 314         }; break;
 315
 316         case 'pipe_wrap': binding = {
 317         }; break;
 318
 319         case 'smalloc': binding = {
 320             alloc() {
 321             },
 322         }; break;
 323
 324         case 'stream_wrap': binding = {
 325         }; break;
 326
 327         case 'tcp_wrap': binding = {
 328         }; break;
 329
 330         case 'timer_wrap': binding = {
 331             kOnTimeout: 0,
 332             Timer: {
 333             },
 334         }; break;
 335
 336         case 'tty_wrap': binding = {
 337         }; break;
 338
 339         case 'uv': binding = {
 340         }; break;
 341
 342         default:
 343             throw new Error('No such module: ' + name);
 344     }
 345
 346     bindings[name] = binding;
 347     return binding;
 348 };
 349
 350 let environ = *(typedef char ***)(dlsym(RTLD_DEFAULT, "environ"));
 351 for (let i = 0; environ[i] != null; ++i) {
 352     let assign = environ[i];
 353     let equal = assign.indexOf('=');
 354     let name = assign.substr(0, equal);
 355     let value = assign.substr(equal + 1);
 356     process.env[name.toString()] = value;
 357 }
 358
 359 process.pid = getpid();
 360
 361 })();