kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include <algorithm> |
| 12 | #include <limits> |
| 13 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 14 | #include "rtc_base/safe_minmax.h" |
| 15 | #include "test/gtest.h" |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 16 | |
| 17 | namespace rtc { |
| 18 | |
| 19 | namespace { |
| 20 | |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 21 | // Functions that check that SafeMin(), SafeMax(), and SafeClamp() return the |
| 22 | // specified type. The functions that end in "R" use an explicitly given return |
| 23 | // type. |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 24 | |
| 25 | template <typename T1, typename T2, typename Tmin, typename Tmax> |
| 26 | constexpr bool TypeCheckMinMax() { |
| 27 | return std::is_same<decltype(SafeMin(std::declval<T1>(), std::declval<T2>())), |
| 28 | Tmin>::value && |
| 29 | std::is_same<decltype(SafeMax(std::declval<T1>(), std::declval<T2>())), |
| 30 | Tmax>::value; |
| 31 | } |
| 32 | |
| 33 | template <typename T1, typename T2, typename R> |
| 34 | constexpr bool TypeCheckMinR() { |
| 35 | return std::is_same< |
| 36 | decltype(SafeMin<R>(std::declval<T1>(), std::declval<T2>())), R>::value; |
| 37 | } |
| 38 | |
| 39 | template <typename T1, typename T2, typename R> |
| 40 | constexpr bool TypeCheckMaxR() { |
| 41 | return std::is_same< |
| 42 | decltype(SafeMax<R>(std::declval<T1>(), std::declval<T2>())), R>::value; |
| 43 | } |
| 44 | |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 45 | template <typename T, typename L, typename H, typename R> |
| 46 | constexpr bool TypeCheckClamp() { |
| 47 | return std::is_same<decltype(SafeClamp(std::declval<T>(), std::declval<L>(), |
| 48 | std::declval<H>())), |
| 49 | R>::value; |
| 50 | } |
| 51 | |
| 52 | template <typename T, typename L, typename H, typename R> |
| 53 | constexpr bool TypeCheckClampR() { |
| 54 | return std::is_same<decltype(SafeClamp<R>(std::declval<T>(), |
| 55 | std::declval<L>(), |
| 56 | std::declval<H>())), |
| 57 | R>::value; |
| 58 | } |
| 59 | |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 60 | // clang-format off |
| 61 | |
| 62 | // SafeMin/SafeMax: Check that all combinations of signed/unsigned 8/64 bits |
| 63 | // give the correct default result type. |
| 64 | static_assert(TypeCheckMinMax< int8_t, int8_t, int8_t, int8_t>(), ""); |
| 65 | static_assert(TypeCheckMinMax< int8_t, uint8_t, int8_t, uint8_t>(), ""); |
| 66 | static_assert(TypeCheckMinMax< int8_t, int64_t, int64_t, int64_t>(), ""); |
| 67 | static_assert(TypeCheckMinMax< int8_t, uint64_t, int8_t, uint64_t>(), ""); |
| 68 | static_assert(TypeCheckMinMax< uint8_t, int8_t, int8_t, uint8_t>(), ""); |
| 69 | static_assert(TypeCheckMinMax< uint8_t, uint8_t, uint8_t, uint8_t>(), ""); |
| 70 | static_assert(TypeCheckMinMax< uint8_t, int64_t, int64_t, int64_t>(), ""); |
| 71 | static_assert(TypeCheckMinMax< uint8_t, uint64_t, uint8_t, uint64_t>(), ""); |
| 72 | static_assert(TypeCheckMinMax< int64_t, int8_t, int64_t, int64_t>(), ""); |
| 73 | static_assert(TypeCheckMinMax< int64_t, uint8_t, int64_t, int64_t>(), ""); |
| 74 | static_assert(TypeCheckMinMax< int64_t, int64_t, int64_t, int64_t>(), ""); |
| 75 | static_assert(TypeCheckMinMax< int64_t, uint64_t, int64_t, uint64_t>(), ""); |
| 76 | static_assert(TypeCheckMinMax<uint64_t, int8_t, int8_t, uint64_t>(), ""); |
| 77 | static_assert(TypeCheckMinMax<uint64_t, uint8_t, uint8_t, uint64_t>(), ""); |
| 78 | static_assert(TypeCheckMinMax<uint64_t, int64_t, int64_t, uint64_t>(), ""); |
| 79 | static_assert(TypeCheckMinMax<uint64_t, uint64_t, uint64_t, uint64_t>(), ""); |
| 80 | |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 81 | // SafeClamp: Check that all combinations of signed/unsigned 8/64 bits give the |
| 82 | // correct result type. |
| 83 | static_assert(TypeCheckClamp< int8_t, int8_t, int8_t, int8_t>(), ""); |
| 84 | static_assert(TypeCheckClamp< int8_t, int8_t, uint8_t, int8_t>(), ""); |
| 85 | static_assert(TypeCheckClamp< int8_t, int8_t, int64_t, int8_t>(), ""); |
| 86 | static_assert(TypeCheckClamp< int8_t, int8_t, uint64_t, int8_t>(), ""); |
| 87 | static_assert(TypeCheckClamp< int8_t, uint8_t, int8_t, int8_t>(), ""); |
| 88 | static_assert(TypeCheckClamp< int8_t, uint8_t, uint8_t, uint8_t>(), ""); |
| 89 | static_assert(TypeCheckClamp< int8_t, uint8_t, int64_t, int16_t>(), ""); |
| 90 | static_assert(TypeCheckClamp< int8_t, uint8_t, uint64_t, int16_t>(), ""); |
| 91 | static_assert(TypeCheckClamp< int8_t, int64_t, int8_t, int8_t>(), ""); |
| 92 | static_assert(TypeCheckClamp< int8_t, int64_t, uint8_t, int16_t>(), ""); |
| 93 | static_assert(TypeCheckClamp< int8_t, int64_t, int64_t, int64_t>(), ""); |
| 94 | static_assert(TypeCheckClamp< int8_t, int64_t, uint64_t, int64_t>(), ""); |
| 95 | static_assert(TypeCheckClamp< int8_t, uint64_t, int8_t, int8_t>(), ""); |
| 96 | static_assert(TypeCheckClamp< int8_t, uint64_t, uint8_t, int16_t>(), ""); |
| 97 | static_assert(TypeCheckClamp< int8_t, uint64_t, int64_t, int64_t>(), ""); |
| 98 | static_assert(TypeCheckClamp< int8_t, uint64_t, uint64_t, uint64_t>(), ""); |
| 99 | static_assert(TypeCheckClamp< uint8_t, int8_t, int8_t, int8_t>(), ""); |
| 100 | static_assert(TypeCheckClamp< uint8_t, int8_t, uint8_t, uint8_t>(), ""); |
| 101 | static_assert(TypeCheckClamp< uint8_t, int8_t, int64_t, int16_t>(), ""); |
| 102 | static_assert(TypeCheckClamp< uint8_t, int8_t, uint64_t, uint8_t>(), ""); |
| 103 | static_assert(TypeCheckClamp< uint8_t, uint8_t, int8_t, uint8_t>(), ""); |
| 104 | static_assert(TypeCheckClamp< uint8_t, uint8_t, uint8_t, uint8_t>(), ""); |
| 105 | static_assert(TypeCheckClamp< uint8_t, uint8_t, int64_t, uint8_t>(), ""); |
| 106 | static_assert(TypeCheckClamp< uint8_t, uint8_t, uint64_t, uint8_t>(), ""); |
| 107 | static_assert(TypeCheckClamp< uint8_t, int64_t, int8_t, int8_t>(), ""); |
| 108 | static_assert(TypeCheckClamp< uint8_t, int64_t, uint8_t, uint8_t>(), ""); |
| 109 | static_assert(TypeCheckClamp< uint8_t, int64_t, int64_t, int64_t>(), ""); |
| 110 | static_assert(TypeCheckClamp< uint8_t, int64_t, uint64_t, uint64_t>(), ""); |
| 111 | static_assert(TypeCheckClamp< uint8_t, uint64_t, int8_t, uint8_t>(), ""); |
| 112 | static_assert(TypeCheckClamp< uint8_t, uint64_t, uint8_t, uint8_t>(), ""); |
| 113 | static_assert(TypeCheckClamp< uint8_t, uint64_t, int64_t, uint64_t>(), ""); |
| 114 | static_assert(TypeCheckClamp< uint8_t, uint64_t, uint64_t, uint64_t>(), ""); |
| 115 | static_assert(TypeCheckClamp< int64_t, int8_t, int8_t, int8_t>(), ""); |
| 116 | static_assert(TypeCheckClamp< int64_t, int8_t, uint8_t, int16_t>(), ""); |
| 117 | static_assert(TypeCheckClamp< int64_t, int8_t, int64_t, int64_t>(), ""); |
| 118 | static_assert(TypeCheckClamp< int64_t, int8_t, uint64_t, int64_t>(), ""); |
| 119 | static_assert(TypeCheckClamp< int64_t, uint8_t, int8_t, int8_t>(), ""); |
| 120 | static_assert(TypeCheckClamp< int64_t, uint8_t, uint8_t, int16_t>(), ""); |
| 121 | static_assert(TypeCheckClamp< int64_t, uint8_t, int64_t, int64_t>(), ""); |
| 122 | static_assert(TypeCheckClamp< int64_t, uint8_t, uint64_t, int64_t>(), ""); |
| 123 | static_assert(TypeCheckClamp< int64_t, int64_t, int8_t, int64_t>(), ""); |
| 124 | static_assert(TypeCheckClamp< int64_t, int64_t, uint8_t, int64_t>(), ""); |
| 125 | static_assert(TypeCheckClamp< int64_t, int64_t, int64_t, int64_t>(), ""); |
| 126 | static_assert(TypeCheckClamp< int64_t, int64_t, uint64_t, int64_t>(), ""); |
| 127 | static_assert(TypeCheckClamp< int64_t, uint64_t, int8_t, int8_t>(), ""); |
| 128 | static_assert(TypeCheckClamp< int64_t, uint64_t, uint8_t, int16_t>(), ""); |
| 129 | static_assert(TypeCheckClamp< int64_t, uint64_t, int64_t, int64_t>(), ""); |
| 130 | static_assert(TypeCheckClamp< int64_t, uint64_t, uint64_t, uint64_t>(), ""); |
| 131 | static_assert(TypeCheckClamp<uint64_t, int8_t, int8_t, int8_t>(), ""); |
| 132 | static_assert(TypeCheckClamp<uint64_t, int8_t, uint8_t, uint8_t>(), ""); |
| 133 | static_assert(TypeCheckClamp<uint64_t, int8_t, int64_t, int64_t>(), ""); |
| 134 | static_assert(TypeCheckClamp<uint64_t, int8_t, uint64_t, uint64_t>(), ""); |
| 135 | static_assert(TypeCheckClamp<uint64_t, uint8_t, int8_t, uint8_t>(), ""); |
| 136 | static_assert(TypeCheckClamp<uint64_t, uint8_t, uint8_t, uint8_t>(), ""); |
| 137 | static_assert(TypeCheckClamp<uint64_t, uint8_t, int64_t, uint64_t>(), ""); |
| 138 | static_assert(TypeCheckClamp<uint64_t, uint8_t, uint64_t, uint64_t>(), ""); |
| 139 | static_assert(TypeCheckClamp<uint64_t, int64_t, int8_t, int8_t>(), ""); |
| 140 | static_assert(TypeCheckClamp<uint64_t, int64_t, uint8_t, uint8_t>(), ""); |
| 141 | static_assert(TypeCheckClamp<uint64_t, int64_t, int64_t, int64_t>(), ""); |
| 142 | static_assert(TypeCheckClamp<uint64_t, int64_t, uint64_t, uint64_t>(), ""); |
| 143 | static_assert(TypeCheckClamp<uint64_t, uint64_t, int8_t, uint8_t>(), ""); |
| 144 | static_assert(TypeCheckClamp<uint64_t, uint64_t, uint8_t, uint8_t>(), ""); |
| 145 | static_assert(TypeCheckClamp<uint64_t, uint64_t, int64_t, uint64_t>(), ""); |
| 146 | static_assert(TypeCheckClamp<uint64_t, uint64_t, uint64_t, uint64_t>(), ""); |
| 147 | |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 148 | enum DefaultE { kFoo = -17 }; |
| 149 | enum UInt8E : uint8_t { kBar = 17 }; |
kwiberg | dbb497a | 2017-06-02 04:24:11 -0700 | [diff] [blame] | 150 | |
| 151 | // SafeMin/SafeMax: Check that we can use enum types. |
| 152 | static_assert(TypeCheckMinMax<unsigned, unsigned, unsigned, unsigned>(), ""); |
| 153 | static_assert(TypeCheckMinMax<unsigned, DefaultE, int, unsigned>(), ""); |
| 154 | static_assert(TypeCheckMinMax<unsigned, UInt8E, uint8_t, unsigned>(), ""); |
| 155 | static_assert(TypeCheckMinMax<DefaultE, unsigned, int, unsigned>(), ""); |
| 156 | static_assert(TypeCheckMinMax<DefaultE, DefaultE, int, int>(), ""); |
| 157 | static_assert(TypeCheckMinMax<DefaultE, UInt8E, int, int>(), ""); |
| 158 | static_assert(TypeCheckMinMax< UInt8E, unsigned, uint8_t, unsigned>(), ""); |
| 159 | static_assert(TypeCheckMinMax< UInt8E, DefaultE, int, int>(), ""); |
| 160 | static_assert(TypeCheckMinMax< UInt8E, UInt8E, uint8_t, uint8_t>(), ""); |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 161 | |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 162 | // SafeClamp: Check that we can use enum types. |
| 163 | static_assert(TypeCheckClamp<unsigned, unsigned, unsigned, unsigned>(), ""); |
| 164 | static_assert(TypeCheckClamp<unsigned, unsigned, DefaultE, unsigned>(), ""); |
| 165 | static_assert(TypeCheckClamp<unsigned, unsigned, UInt8E, uint8_t>(), ""); |
| 166 | static_assert(TypeCheckClamp<unsigned, DefaultE, unsigned, unsigned>(), ""); |
| 167 | static_assert(TypeCheckClamp<unsigned, DefaultE, DefaultE, int>(), ""); |
| 168 | static_assert(TypeCheckClamp<unsigned, DefaultE, UInt8E, uint8_t>(), ""); |
| 169 | static_assert(TypeCheckClamp<unsigned, UInt8E, unsigned, unsigned>(), ""); |
| 170 | static_assert(TypeCheckClamp<unsigned, UInt8E, DefaultE, unsigned>(), ""); |
| 171 | static_assert(TypeCheckClamp<unsigned, UInt8E, UInt8E, uint8_t>(), ""); |
| 172 | static_assert(TypeCheckClamp<DefaultE, unsigned, unsigned, unsigned>(), ""); |
| 173 | static_assert(TypeCheckClamp<DefaultE, unsigned, DefaultE, int>(), ""); |
| 174 | static_assert(TypeCheckClamp<DefaultE, unsigned, UInt8E, int16_t>(), ""); |
| 175 | static_assert(TypeCheckClamp<DefaultE, DefaultE, unsigned, int>(), ""); |
| 176 | static_assert(TypeCheckClamp<DefaultE, DefaultE, DefaultE, int>(), ""); |
| 177 | static_assert(TypeCheckClamp<DefaultE, DefaultE, UInt8E, int>(), ""); |
| 178 | static_assert(TypeCheckClamp<DefaultE, UInt8E, unsigned, int>(), ""); |
| 179 | static_assert(TypeCheckClamp<DefaultE, UInt8E, DefaultE, int>(), ""); |
| 180 | static_assert(TypeCheckClamp<DefaultE, UInt8E, UInt8E, int16_t>(), ""); |
| 181 | static_assert(TypeCheckClamp< UInt8E, unsigned, unsigned, unsigned>(), ""); |
| 182 | static_assert(TypeCheckClamp< UInt8E, unsigned, DefaultE, unsigned>(), ""); |
| 183 | static_assert(TypeCheckClamp< UInt8E, unsigned, UInt8E, uint8_t>(), ""); |
| 184 | static_assert(TypeCheckClamp< UInt8E, DefaultE, unsigned, unsigned>(), ""); |
| 185 | static_assert(TypeCheckClamp< UInt8E, DefaultE, DefaultE, int>(), ""); |
| 186 | static_assert(TypeCheckClamp< UInt8E, DefaultE, UInt8E, uint8_t>(), ""); |
| 187 | static_assert(TypeCheckClamp< UInt8E, UInt8E, unsigned, uint8_t>(), ""); |
| 188 | static_assert(TypeCheckClamp< UInt8E, UInt8E, DefaultE, uint8_t>(), ""); |
| 189 | static_assert(TypeCheckClamp< UInt8E, UInt8E, UInt8E, uint8_t>(), ""); |
| 190 | |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 191 | using ld = long double; |
| 192 | |
| 193 | // SafeMin/SafeMax: Check that all floating-point combinations give the |
| 194 | // correct result type. |
| 195 | static_assert(TypeCheckMinMax< float, float, float, float>(), ""); |
| 196 | static_assert(TypeCheckMinMax< float, double, double, double>(), ""); |
| 197 | static_assert(TypeCheckMinMax< float, ld, ld, ld>(), ""); |
| 198 | static_assert(TypeCheckMinMax<double, float, double, double>(), ""); |
| 199 | static_assert(TypeCheckMinMax<double, double, double, double>(), ""); |
| 200 | static_assert(TypeCheckMinMax<double, ld, ld, ld>(), ""); |
| 201 | static_assert(TypeCheckMinMax< ld, float, ld, ld>(), ""); |
| 202 | static_assert(TypeCheckMinMax< ld, double, ld, ld>(), ""); |
| 203 | static_assert(TypeCheckMinMax< ld, ld, ld, ld>(), ""); |
| 204 | |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 205 | // SafeClamp: Check that all floating-point combinations give the correct |
| 206 | // result type. |
| 207 | static_assert(TypeCheckClamp< float, float, float, float>(), ""); |
| 208 | static_assert(TypeCheckClamp< float, float, double, double>(), ""); |
| 209 | static_assert(TypeCheckClamp< float, float, ld, ld>(), ""); |
| 210 | static_assert(TypeCheckClamp< float, double, float, double>(), ""); |
| 211 | static_assert(TypeCheckClamp< float, double, double, double>(), ""); |
| 212 | static_assert(TypeCheckClamp< float, double, ld, ld>(), ""); |
| 213 | static_assert(TypeCheckClamp< float, ld, float, ld>(), ""); |
| 214 | static_assert(TypeCheckClamp< float, ld, double, ld>(), ""); |
| 215 | static_assert(TypeCheckClamp< float, ld, ld, ld>(), ""); |
| 216 | static_assert(TypeCheckClamp<double, float, float, double>(), ""); |
| 217 | static_assert(TypeCheckClamp<double, float, double, double>(), ""); |
| 218 | static_assert(TypeCheckClamp<double, float, ld, ld>(), ""); |
| 219 | static_assert(TypeCheckClamp<double, double, float, double>(), ""); |
| 220 | static_assert(TypeCheckClamp<double, double, double, double>(), ""); |
| 221 | static_assert(TypeCheckClamp<double, double, ld, ld>(), ""); |
| 222 | static_assert(TypeCheckClamp<double, ld, float, ld>(), ""); |
| 223 | static_assert(TypeCheckClamp<double, ld, double, ld>(), ""); |
| 224 | static_assert(TypeCheckClamp<double, ld, ld, ld>(), ""); |
| 225 | static_assert(TypeCheckClamp< ld, float, float, ld>(), ""); |
| 226 | static_assert(TypeCheckClamp< ld, float, double, ld>(), ""); |
| 227 | static_assert(TypeCheckClamp< ld, float, ld, ld>(), ""); |
| 228 | static_assert(TypeCheckClamp< ld, double, float, ld>(), ""); |
| 229 | static_assert(TypeCheckClamp< ld, double, double, ld>(), ""); |
| 230 | static_assert(TypeCheckClamp< ld, double, ld, ld>(), ""); |
| 231 | static_assert(TypeCheckClamp< ld, ld, float, ld>(), ""); |
| 232 | static_assert(TypeCheckClamp< ld, ld, double, ld>(), ""); |
| 233 | static_assert(TypeCheckClamp< ld, ld, ld, ld>(), ""); |
| 234 | |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 235 | // clang-format on |
| 236 | |
| 237 | // SafeMin/SafeMax: Check some cases of explicitly specified return type. The |
| 238 | // commented-out lines give compilation errors due to the requested return type |
| 239 | // being too small or requiring an int<->float conversion. |
| 240 | static_assert(TypeCheckMinR<int8_t, int8_t, int16_t>(), ""); |
| 241 | // static_assert(TypeCheckMinR<int8_t, int8_t, float>(), ""); |
| 242 | static_assert(TypeCheckMinR<uint32_t, uint64_t, uint32_t>(), ""); |
| 243 | // static_assert(TypeCheckMaxR<uint64_t, float, float>(), ""); |
| 244 | // static_assert(TypeCheckMaxR<uint64_t, double, float>(), ""); |
| 245 | static_assert(TypeCheckMaxR<uint32_t, int32_t, uint32_t>(), ""); |
| 246 | // static_assert(TypeCheckMaxR<uint32_t, int32_t, int32_t>(), ""); |
| 247 | |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 248 | // SafeClamp: Check some cases of explicitly specified return type. The |
| 249 | // commented-out lines give compilation errors due to the requested return type |
| 250 | // being too small. |
| 251 | static_assert(TypeCheckClampR<int16_t, int8_t, uint8_t, int16_t>(), ""); |
| 252 | static_assert(TypeCheckClampR<int16_t, int8_t, uint8_t, int32_t>(), ""); |
| 253 | // static_assert(TypeCheckClampR<int16_t, int8_t, uint8_t, uint32_t>(), ""); |
| 254 | |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 255 | template <typename T1, typename T2, typename Tmin, typename Tmax> |
| 256 | constexpr bool CheckMinMax(T1 a, T2 b, Tmin min, Tmax max) { |
| 257 | return TypeCheckMinMax<T1, T2, Tmin, Tmax>() && SafeMin(a, b) == min && |
| 258 | SafeMax(a, b) == max; |
| 259 | } |
| 260 | |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 261 | template <typename T, typename L, typename H, typename R> |
| 262 | bool CheckClamp(T x, L min, H max, R clamped) { |
| 263 | return TypeCheckClamp<T, L, H, R>() && SafeClamp(x, min, max) == clamped; |
| 264 | } |
| 265 | |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 266 | // SafeMin/SafeMax: Check a few values. |
| 267 | static_assert(CheckMinMax(int8_t{1}, int8_t{-1}, int8_t{-1}, int8_t{1}), ""); |
| 268 | static_assert(CheckMinMax(uint8_t{1}, int8_t{-1}, int8_t{-1}, uint8_t{1}), ""); |
| 269 | static_assert(CheckMinMax(uint8_t{5}, uint64_t{2}, uint8_t{2}, uint64_t{5}), |
| 270 | ""); |
| 271 | static_assert(CheckMinMax(std::numeric_limits<int32_t>::min(), |
| 272 | std::numeric_limits<uint32_t>::max(), |
| 273 | std::numeric_limits<int32_t>::min(), |
| 274 | std::numeric_limits<uint32_t>::max()), |
| 275 | ""); |
| 276 | static_assert(CheckMinMax(std::numeric_limits<int32_t>::min(), |
| 277 | std::numeric_limits<uint16_t>::max(), |
| 278 | std::numeric_limits<int32_t>::min(), |
| 279 | int32_t{std::numeric_limits<uint16_t>::max()}), |
| 280 | ""); |
| 281 | // static_assert(CheckMinMax(1.f, 2, 1.f, 2.f), ""); |
| 282 | static_assert(CheckMinMax(1.f, 0.0, 0.0, 1.0), ""); |
| 283 | |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 284 | // SafeClamp: Check a few values. |
| 285 | TEST(SafeMinmaxTest, Clamp) { |
| 286 | EXPECT_TRUE(CheckClamp(int32_t{-1000000}, std::numeric_limits<int16_t>::min(), |
| 287 | std::numeric_limits<int16_t>::max(), |
| 288 | std::numeric_limits<int16_t>::min())); |
| 289 | EXPECT_TRUE(CheckClamp(uint32_t{1000000}, std::numeric_limits<int16_t>::min(), |
| 290 | std::numeric_limits<int16_t>::max(), |
| 291 | std::numeric_limits<int16_t>::max())); |
| 292 | EXPECT_TRUE(CheckClamp(3.f, -1.0, 1.f, 1.0)); |
| 293 | EXPECT_TRUE(CheckClamp(3.0, -1.f, 1.f, 1.0)); |
| 294 | } |
| 295 | |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 296 | } // namespace |
| 297 | |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 298 | // These functions aren't used in the tests, but it's useful to look at the |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 299 | // compiler output for them, and verify that (1) the same-signedness Test*Safe |
| 300 | // functions result in exactly the same code as their Test*Ref counterparts, |
| 301 | // and that (2) the mixed-signedness Test*Safe functions have just a few extra |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 302 | // arithmetic and logic instructions (but no extra control flow instructions). |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 303 | |
| 304 | // clang-format off |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 305 | int32_t TestMinRef( int32_t a, int32_t b) { return std::min(a, b); } |
| 306 | uint32_t TestMinRef( uint32_t a, uint32_t b) { return std::min(a, b); } |
| 307 | int32_t TestMinSafe( int32_t a, int32_t b) { return SafeMin(a, b); } |
| 308 | int32_t TestMinSafe( int32_t a, uint32_t b) { return SafeMin(a, b); } |
| 309 | int32_t TestMinSafe(uint32_t a, int32_t b) { return SafeMin(a, b); } |
| 310 | uint32_t TestMinSafe(uint32_t a, uint32_t b) { return SafeMin(a, b); } |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 311 | // clang-format on |
| 312 | |
kwiberg | 0703856 | 2017-06-12 11:40:47 -0700 | [diff] [blame] | 313 | int32_t TestClampRef(int32_t x, int32_t a, int32_t b) { |
| 314 | return std::max(a, std::min(x, b)); |
| 315 | } |
| 316 | uint32_t TestClampRef(uint32_t x, uint32_t a, uint32_t b) { |
| 317 | return std::max(a, std::min(x, b)); |
| 318 | } |
| 319 | int32_t TestClampSafe(int32_t x, int32_t a, int32_t b) { |
| 320 | return SafeClamp(x, a, b); |
| 321 | } |
| 322 | int32_t TestClampSafe(int32_t x, int32_t a, uint32_t b) { |
| 323 | return SafeClamp(x, a, b); |
| 324 | } |
| 325 | int32_t TestClampSafe(int32_t x, uint32_t a, int32_t b) { |
| 326 | return SafeClamp(x, a, b); |
| 327 | } |
| 328 | uint32_t TestClampSafe(int32_t x, uint32_t a, uint32_t b) { |
| 329 | return SafeClamp(x, a, b); |
| 330 | } |
| 331 | int32_t TestClampSafe(uint32_t x, int32_t a, int32_t b) { |
| 332 | return SafeClamp(x, a, b); |
| 333 | } |
| 334 | uint32_t TestClampSafe(uint32_t x, int32_t a, uint32_t b) { |
| 335 | return SafeClamp(x, a, b); |
| 336 | } |
| 337 | int32_t TestClampSafe(uint32_t x, uint32_t a, int32_t b) { |
| 338 | return SafeClamp(x, a, b); |
| 339 | } |
| 340 | uint32_t TestClampSafe(uint32_t x, uint32_t a, uint32_t b) { |
| 341 | return SafeClamp(x, a, b); |
| 342 | } |
| 343 | |
kwiberg | 7885d3f | 2017-04-25 12:35:07 -0700 | [diff] [blame] | 344 | } // namespace rtc |