1 /* 2 * Copyright 2011 Google Inc. All Rights Reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SFNTLY_CPP_SRC_SFNTLY_PORT_TYPE_H_ 18 #define SFNTLY_CPP_SRC_SFNTLY_PORT_TYPE_H_ 19 20 #include <stdint.h> 21 22 #include <cassert> 23 #include <cstddef> 24 #include <set> 25 #include <vector> 26 27 namespace sfntly { 28 29 // deprecated 30 typedef uint8_t byte_t; 31 typedef uint16_t word_t; 32 typedef uint32_t dword_t; 33 typedef uint64_t qword_t; 34 typedef std::vector<uint8_t> ByteVector; 35 typedef std::vector<int32_t> IntegerList; 36 typedef std::set<int32_t> IntegerSet; 37 38 // A macro to disallow the copy constructor and operator= functions. 39 // This should be used in the private: declarations for a class. 40 #define NO_COPY_AND_ASSIGN(TypeName) \ 41 TypeName(const TypeName&); \ 42 void operator=(const TypeName&) 43 44 } // namespace sfntly 45 46 // Make google3 happy since it prohibits RTTI. 47 template<typename To, typename From> implicit_cast(From const & f)48inline To implicit_cast(From const &f) { 49 return f; 50 } 51 52 template<typename To, typename From> // use like this: down_cast<T*>(foo); down_cast(From * f)53inline To down_cast(From* f) { // so we only accept pointers 54 // Ensures that To is a sub-type of From *. This test is here only 55 // for compile-time type checking, and has no overhead in an 56 // optimized build at run-time, as it will be optimized away 57 // completely. 58 #if defined (_MSC_VER) 59 #pragma warning(push) 60 #pragma warning(disable:4127) // disable "conditional expression is constant" 61 #endif 62 if (false) { 63 implicit_cast<From*, To>(0); 64 } 65 #if defined (_MSC_VER) 66 #pragma warning(pop) 67 #endif 68 69 // The following code is the only place for RTTI. It is done so to allow 70 // additional type checking when SFNTLY_TYPE_VERIFICATION is defined. 71 #if defined (SFNTLY_TYPE_VERIFICATION) 72 assert(f == NULL || dynamic_cast<To>(f) != NULL); 73 #endif 74 return static_cast<To>(f); 75 } 76 77 #if !defined(WIN32) 78 #define UNREFERENCED_PARAMETER(p) do { (void)p; } while (0) 79 #endif 80 81 #endif // SFNTLY_CPP_SRC_SFNTLY_PORT_TYPE_H_ 82