1 #ifndef _DEDEFS_HPP 2 #define _DEDEFS_HPP 3 /*------------------------------------------------------------------------- 4 * drawElements C++ Base Library 5 * ----------------------------- 6 * 7 * Copyright 2014 The Android Open Source Project 8 * 9 * Licensed under the Apache License, Version 2.0 (the "License"); 10 * you may not use this file except in compliance with the License. 11 * You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 * 21 *//*! 22 * \file 23 * \brief Basic definitions. 24 *//*--------------------------------------------------------------------*/ 25 26 #include "deDefs.h" 27 28 #if !defined(__cplusplus) 29 # error "C++ is required" 30 #endif 31 32 namespace de 33 { 34 35 //!< Compute absolute value of x. 36 template<typename T> inline T abs (T x) { return x < T(0) ? -x : x; } 37 38 //!< Get minimum of x and y. 39 template<typename T> inline T min (T x, T y) { return x <= y ? x : y; } 40 41 //!< Get maximum of x and y. 42 template<typename T> inline T max (T x, T y) { return x >= y ? x : y; } 43 44 //!< Clamp x in range a <= x <= b. 45 template<typename T> inline T clamp (T x, T a, T b) { DE_ASSERT(a <= b); return x < a ? a : (x > b ? b : x); } 46 47 //!< Test if x is in bounds a <= x < b. 48 template<typename T> inline bool inBounds (T x, T a, T b) { return a <= x && x < b; } 49 50 //!< Test if x is in range a <= x <= b. 51 template<typename T> inline bool inRange (T x, T a, T b) { return a <= x && x <= b; } 52 53 //! Helper for DE_CHECK() macros. 54 void throwRuntimeError (const char* message, const char* expr, const char* file, int line); 55 56 //! Default deleter. 57 template<typename T> struct DefaultDeleter 58 { 59 inline DefaultDeleter (void) {} 60 template<typename U> inline DefaultDeleter (const DefaultDeleter<U>&) {} 61 template<typename U> inline DefaultDeleter<T>& operator= (const DefaultDeleter<U>&) { return *this; } 62 inline void operator() (T* ptr) const { delete ptr; } 63 }; 64 65 //! A deleter for arrays 66 template<typename T> struct ArrayDeleter 67 { 68 inline ArrayDeleter (void) {} 69 template<typename U> inline ArrayDeleter (const ArrayDeleter<U>&) {} 70 template<typename U> inline ArrayDeleter<T>& operator= (const ArrayDeleter<U>&) { return *this; } 71 inline void operator() (T* ptr) const { delete[] ptr; } 72 }; 73 74 } // de 75 76 /*--------------------------------------------------------------------*//*! 77 * \brief Throw runtime error if condition is not met. 78 * \param X Condition to check. 79 * 80 * This macro throws std::runtime_error if condition X is not met. 81 *//*--------------------------------------------------------------------*/ 82 #define DE_CHECK_RUNTIME_ERR(X) do { if ((!deGetFalse() && (X)) ? DE_FALSE : DE_TRUE) ::de::throwRuntimeError(DE_NULL, #X, __FILE__, __LINE__); } while(deGetFalse()) 83 84 /*--------------------------------------------------------------------*//*! 85 * \brief Throw runtime error if condition is not met. 86 * \param X Condition to check. 87 * \param MSG Additional message to include in the exception. 88 * 89 * This macro throws std::runtime_error with message MSG if condition X is 90 * not met. 91 *//*--------------------------------------------------------------------*/ 92 #define DE_CHECK_RUNTIME_ERR_MSG(X, MSG) do { if ((!deGetFalse() && (X)) ? DE_FALSE : DE_TRUE) ::de::throwRuntimeError(MSG, #X, __FILE__, __LINE__); } while(deGetFalse()) 93 94 //! Get array start pointer. 95 #define DE_ARRAY_BEGIN(ARR) (&(ARR)[0]) 96 97 //! Get array end pointer. 98 #define DE_ARRAY_END(ARR) (DE_ARRAY_BEGIN(ARR) + DE_LENGTH_OF_ARRAY(ARR)) 99 100 //! Empty C++ compilation unit silencing. 101 #if (DE_COMPILER == DE_COMPILER_MSC) 102 # define DE_EMPTY_CPP_FILE namespace { deUint8 unused; } 103 #else 104 # define DE_EMPTY_CPP_FILE 105 #endif 106 107 // Warn if type is constructed, but left unused 108 // 109 // Used in types with non-trivial ctor/dtor but with ctor-dtor pair causing no (observable) 110 // side-effects. 111 // 112 // \todo add attribute for GCC 113 #if (DE_COMPILER == DE_COMPILER_CLANG) && defined(__has_attribute) 114 # if __has_attribute(warn_unused) 115 # define DE_WARN_UNUSED_TYPE __attribute__((warn_unused)) 116 # else 117 # define DE_WARN_UNUSED_TYPE 118 # endif 119 #else 120 # define DE_WARN_UNUSED_TYPE 121 #endif 122 123 #endif // _DEDEFS_HPP 124