File: chat-websocket/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/src/bufferutil.cc

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File: chat-websocket/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/src/bufferutil.cc
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/*! * ws: a node.js websocket client * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com> * MIT Licensed */ #include <v8.h> #include <node.h> #include <node_buffer.h> #include <node_object_wrap.h> #include <stdlib.h> #include <string.h> #include <wchar.h> #include <stdio.h> using namespace v8; using namespace node; class BufferUtil : public ObjectWrap { public: static void Initialize(v8::Handle<v8::Object> target) { HandleScope scope; Local<FunctionTemplate> t = FunctionTemplate::New(New); t->InstanceTemplate()->SetInternalFieldCount(1); NODE_SET_METHOD(t->GetFunction(), "unmask", BufferUtil::Unmask); NODE_SET_METHOD(t->GetFunction(), "mask", BufferUtil::Mask); NODE_SET_METHOD(t->GetFunction(), "merge", BufferUtil::Merge); target->Set(String::NewSymbol("BufferUtil"), t->GetFunction()); } protected: static Handle<Value> New(const Arguments& args) { HandleScope scope; BufferUtil* bufferUtil = new BufferUtil(); bufferUtil->Wrap(args.This()); return args.This(); } static Handle<Value> Merge(const Arguments& args) { HandleScope scope; Local<Object> bufferObj = args[0]->ToObject(); char* buffer = Buffer::Data(bufferObj); Local<Array> array = Local<Array>::Cast(args[1]); unsigned int arrayLength = array->Length(); unsigned int offset = 0; unsigned int i; for (i = 0; i < arrayLength; ++i) { Local<Object> src = array->Get(i)->ToObject(); unsigned int length = Buffer::Length(src); memcpy(buffer + offset, Buffer::Data(src), length); offset += length; } return scope.Close(True()); } static Handle<Value> Unmask(const Arguments& args) { HandleScope scope; Local<Object> buffer_obj = args[0]->ToObject(); unsigned int length = Buffer::Length(buffer_obj); Local<Object> mask_obj = args[1]->ToObject(); unsigned int *mask = (unsigned int*)Buffer::Data(mask_obj); unsigned int* from = (unsigned int*)Buffer::Data(buffer_obj); unsigned int len32 = length / 4; unsigned int i; for (i = 0; i < len32; ++i) *(from + i) ^= *mask; from += i; switch (length % 4) { case 3: *((unsigned char*)from+2) = *((unsigned char*)from+2) ^ ((unsigned char*)mask)[2]; case 2: *((unsigned char*)from+1) = *((unsigned char*)from+1) ^ ((unsigned char*)mask)[1]; case 1: *((unsigned char*)from ) = *((unsigned char*)from ) ^ ((unsigned char*)mask)[0]; case 0:; } return True(); } static Handle<Value> Mask(const Arguments& args) { HandleScope scope; Local<Object> buffer_obj = args[0]->ToObject(); Local<Object> mask_obj = args[1]->ToObject(); unsigned int *mask = (unsigned int*)Buffer::Data(mask_obj); Local<Object> output_obj = args[2]->ToObject(); unsigned int dataOffset = args[3]->Int32Value(); unsigned int length = args[4]->Int32Value(); unsigned int* to = (unsigned int*)(Buffer::Data(output_obj) + dataOffset); unsigned int* from = (unsigned int*)Buffer::Data(buffer_obj); unsigned int len32 = length / 4; unsigned int i; for (i = 0; i < len32; ++i) *(to + i) = *(from + i) ^ *mask; to += i; from += i; switch (length % 4) { case 3: *((unsigned char*)to+2) = *((unsigned char*)from+2) ^ *((unsigned char*)mask+2); case 2: *((unsigned char*)to+1) = *((unsigned char*)from+1) ^ *((unsigned char*)mask+1); case 1: *((unsigned char*)to ) = *((unsigned char*)from ) ^ *((unsigned char*)mask); case 0:; } return True(); } }; extern "C" void init (Handle<Object> target) { HandleScope scope; BufferUtil::Initialize(target); } NODE_MODULE(bufferutil, init)