3 /*-------------------------------------------------------------------------
4 * drawElements C++ Base Library
5 * -----------------------------
7 * Copyright 2014 The Android Open Source Project
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
13 * http://www.apache.org/licenses/LICENSE-2.0
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.
23 * \brief Basic definitions.
24 *//*--------------------------------------------------------------------*/
28 #if !defined(__cplusplus)
29 # error "C++ is required"
35 //! Compute absolute value of x.
36 template<typename T> inline T abs (T x) { return x < T(0) ? -x : x; }
38 //! Get minimum of x and y.
39 template<typename T> inline T min (T x, T y) { return x <= y ? x : y; }
41 //! Get maximum of x and y.
42 template<typename T> inline T max (T x, T y) { return x >= y ? x : y; }
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); }
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; }
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; }
53 //! Helper for DE_CHECK() macros.
54 void throwRuntimeError (const char* message, const char* expr, const char* file, int line);
57 template<typename T> struct DefaultDeleter
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; }
65 //! A deleter for arrays
66 template<typename T> struct ArrayDeleter
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; }
74 //! Get required memory alignment for type
78 struct PaddingCheck { deUint8 b; T t; };
79 return (size_t)DE_OFFSET_OF(PaddingCheck, t);
84 /*--------------------------------------------------------------------*//*!
85 * \brief Throw runtime error if condition is not met.
86 * \param X Condition to check.
88 * This macro throws std::runtime_error if condition X is not met.
89 *//*--------------------------------------------------------------------*/
90 #define DE_CHECK_RUNTIME_ERR(X) do { if ((!deGetFalse() && (X)) ? DE_FALSE : DE_TRUE) ::de::throwRuntimeError(DE_NULL, #X, __FILE__, __LINE__); } while(deGetFalse())
92 /*--------------------------------------------------------------------*//*!
93 * \brief Throw runtime error if condition is not met.
94 * \param X Condition to check.
95 * \param MSG Additional message to include in the exception.
97 * This macro throws std::runtime_error with message MSG if condition X is
99 *//*--------------------------------------------------------------------*/
100 #define DE_CHECK_RUNTIME_ERR_MSG(X, MSG) do { if ((!deGetFalse() && (X)) ? DE_FALSE : DE_TRUE) ::de::throwRuntimeError(MSG, #X, __FILE__, __LINE__); } while(deGetFalse())
102 //! Get array start pointer.
103 #define DE_ARRAY_BEGIN(ARR) (&(ARR)[0])
105 //! Get array end pointer.
106 #define DE_ARRAY_END(ARR) (DE_ARRAY_BEGIN(ARR) + DE_LENGTH_OF_ARRAY(ARR))
108 //! Empty C++ compilation unit silencing.
109 #if (DE_COMPILER == DE_COMPILER_MSC)
110 # define DE_EMPTY_CPP_FILE namespace { deUint8 unused; }
112 # define DE_EMPTY_CPP_FILE
115 // Warn if type is constructed, but left unused
117 // Used in types with non-trivial ctor/dtor but with ctor-dtor pair causing no (observable)
120 // \todo add attribute for GCC
121 #if (DE_COMPILER == DE_COMPILER_CLANG) && defined(__has_attribute)
122 # if __has_attribute(warn_unused)
123 # define DE_WARN_UNUSED_TYPE __attribute__((warn_unused))
125 # define DE_WARN_UNUSED_TYPE
128 # define DE_WARN_UNUSED_TYPE
131 #endif // _DEDEFS_HPP