+/* Cydia Substrate - Powerful Code Insertion Platform
+ * Copyright (C) 2008-2015 Jay Freeman (saurik)
+*/
+
+(function(exports) {
+
+var libcycript = dlopen("/usr/lib/libcycript.dylib", RTLD_NOLOAD);
+if (libcycript == null) {
+ exports.error = dlerror();
+ return;
+}
+
+var CYHandleServer = dlsym(libcycript, "CYHandleServer");
+if (CYHandleServer == null) {
+ exports.error = dlerror();
+ return;
+}
+
+var info = new Dl_info;
+if (dladdr(CYHandleServer, info) == 0) {
+ exports.error = dlerror();
+ return;
+}
+
+var path = info->dli_fname;
+var slash = path.lastIndexOf('/');
+if (slash == -1)
+ return;
+
+var libsubstrate = dlopen(path.substr(0, slash) + "/libsubstrate.dylib", RTLD_GLOBAL | RTLD_LAZY);
+if (libsubstrate == null) {
+ exports.error = dlerror();
+ return;
+}
+
+extern "C" void *MSGetImageByName(const char *);
+extern "C" void *MSFindSymbol(void *, const char *);
+extern "C" void MSHookFunction(void *, void *, void **);
+extern "C" void MSHookMessageEx(Class, SEL, void *, void **);
+
+var slice = Array.prototype.slice;
+
+exports.getImageByName = MSGetImageByName;
+exports.findSymbol = MSFindSymbol;
+
+exports.hookFunction = function(func, hook, old) {
+ var type = typeid(func);
+
+ var pointer;
+ if (old == null || typeof old === "undefined")
+ pointer = null;
+ else {
+ pointer = new (typedef void **);
+ *old = function() { return type(*pointer).apply(null, arguments); };
+ }
+
+ MSHookFunction(func.valueOf(), type(hook), pointer);
+};
+
+exports.hookMessage = function(isa, sel, imp, old) {
+ var type = sel.type(isa);
+
+ var pointer;
+ if (old == null || typeof old === "undefined")
+ pointer = null;
+ else {
+ pointer = new (typedef void **);
+ *old = function() { return type(*pointer).apply(null, [this, sel].concat(slice.call(arguments))); };
+ }
+
+ MSHookMessageEx(isa, sel, type(function(self, sel) { return imp.apply(self, slice.call(arguments, 2)); }), pointer);
+};
+
+})(exports);