1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // UNSUPPORTED: c++03, c++11, c++14 10 // TODO FMT Evaluate gcc-12 status 11 // UNSUPPORTED: gcc-12 12 13 // ADDITIONAL_COMPILE_FLAGS(has-fconstexpr-steps): -fconstexpr-steps=12712420 14 // ADDITIONAL_COMPILE_FLAGS(has-fconstexpr-ops-limit): -fconstexpr-ops-limit=50000000 15 16 // <charconv> 17 18 // constexpr to_chars_result to_chars(char* first, char* last, Integral value, 19 // int base = 10) 20 21 #include <charconv> 22 #include "test_macros.h" 23 #include "charconv_test_helpers.h" 24 25 #ifndef TEST_HAS_NO_INT128 26 TEST_CONSTEXPR_CXX23 __uint128_t make_u128(__uint128_t a, std::uint64_t b) { 27 a *= 1000000000000000000UL; 28 a *= 10; 29 return a + b; 30 } 31 32 TEST_CONSTEXPR_CXX23 __uint128_t make_u128(__uint128_t a, std::uint64_t b, std::uint64_t c) { 33 a *= 10000000000000ULL; 34 a += b; 35 a *= 10000000000000ULL; 36 return a + c; 37 } 38 39 TEST_CONSTEXPR_CXX23 __int128_t make_i128(__int128_t a, std::int64_t b) { 40 if (a < 0) 41 return -make_u128(-a, b); 42 return make_u128(a, b); 43 } 44 45 TEST_CONSTEXPR_CXX23 __int128_t make_i128(__int128_t a, __int128_t b, std::int64_t c) { 46 if (a < 0) 47 return -make_u128(-a, b, c); 48 return make_u128(a, b, c); 49 } 50 #endif 51 52 template <typename T> 53 struct test_basics : to_chars_test_base<T> 54 { 55 using to_chars_test_base<T>::test; 56 using to_chars_test_base<T>::test_value; 57 58 TEST_CONSTEXPR_CXX23 void operator()() 59 { 60 test(0, "0"); 61 test(42, "42"); 62 test(32768, "32768"); 63 test(0, "0", 10); 64 test(42, "42", 10); 65 test(32768, "32768", 10); 66 test(0xf, "f", 16); 67 test(0xdeadbeaf, "deadbeaf", 16); 68 test(0755, "755", 8); 69 70 // Test each len till len of UINT64_MAX = 20 because to_chars algorithm 71 // makes branches based on decimal digits count in the value string 72 // representation. 73 // Test driver automatically skips values not fitting into source type. 74 test(1UL, "1"); 75 test(12UL, "12"); 76 test(123UL, "123"); 77 test(1234UL, "1234"); 78 test(12345UL, "12345"); 79 test(123456UL, "123456"); 80 test(1234567UL, "1234567"); 81 test(12345678UL, "12345678"); 82 test(123456789UL, "123456789"); 83 test(1234567890UL, "1234567890"); 84 test(12345678901UL, "12345678901"); 85 test(123456789012UL, "123456789012"); 86 test(1234567890123UL, "1234567890123"); 87 test(12345678901234UL, "12345678901234"); 88 test(123456789012345UL, "123456789012345"); 89 test(1234567890123456UL, "1234567890123456"); 90 test(12345678901234567UL, "12345678901234567"); 91 test(123456789012345678UL, "123456789012345678"); 92 test(1234567890123456789UL, "1234567890123456789"); 93 test(12345678901234567890UL, "12345678901234567890"); 94 #ifndef TEST_HAS_NO_INT128 95 test(make_u128(12UL, 3456789012345678901UL), "123456789012345678901"); 96 test(make_u128(123UL, 4567890123456789012UL), "1234567890123456789012"); 97 test(make_u128(1234UL, 5678901234567890123UL), "12345678901234567890123"); 98 test(make_u128(12345UL, 6789012345678901234UL), "123456789012345678901234"); 99 test(make_u128(123456UL, 7890123456789012345UL), "1234567890123456789012345"); 100 test(make_u128(1234567UL, 8901234567890123456UL), "12345678901234567890123456"); 101 test(make_u128(12345678UL, 9012345678901234567UL), "123456789012345678901234567"); 102 test(make_u128(123456789UL, 123456789012345678UL), "1234567890123456789012345678"); 103 test(make_u128(123UL, 4567890123456UL, 7890123456789UL), "12345678901234567890123456789"); 104 test(make_u128(1234UL, 5678901234567UL, 8901234567890UL), "123456789012345678901234567890"); 105 test(make_u128(12345UL, 6789012345678UL, 9012345678901UL), "1234567890123456789012345678901"); 106 test(make_u128(123456UL, 7890123456789UL, 123456789012UL), "12345678901234567890123456789012"); 107 test(make_u128(1234567UL, 8901234567890UL, 1234567890123UL), "123456789012345678901234567890123"); 108 test(make_u128(12345678UL, 9012345678901UL, 2345678901234UL), "1234567890123456789012345678901234"); 109 test(make_u128(123456789UL, 123456789012UL, 3456789012345UL), "12345678901234567890123456789012345"); 110 test(make_u128(1234567890UL, 1234567890123UL, 4567890123456UL), "123456789012345678901234567890123456"); 111 test(make_u128(12345678901UL, 2345678901234UL, 5678901234567UL), "1234567890123456789012345678901234567"); 112 test(make_u128(123456789012UL, 3456789012345UL, 6789012345678UL), "12345678901234567890123456789012345678"); 113 test(make_u128(1234567890123UL, 4567890123456UL, 7890123456789UL), "123456789012345678901234567890123456789"); 114 #endif 115 116 // Test special cases with zeros inside a value string representation, 117 // to_chars algorithm processes them in a special way and should not 118 // skip trailing zeros 119 // Test driver automatically skips values not fitting into source type. 120 test(0UL, "0"); 121 test(10UL, "10"); 122 test(100UL, "100"); 123 test(1000UL, "1000"); 124 test(10000UL, "10000"); 125 test(100000UL, "100000"); 126 test(1000000UL, "1000000"); 127 test(10000000UL, "10000000"); 128 test(100000000UL, "100000000"); 129 test(1000000000UL, "1000000000"); 130 test(10000000000UL, "10000000000"); 131 test(100000000000UL, "100000000000"); 132 test(1000000000000UL, "1000000000000"); 133 test(10000000000000UL, "10000000000000"); 134 test(100000000000000UL, "100000000000000"); 135 test(1000000000000000UL, "1000000000000000"); 136 test(10000000000000000UL, "10000000000000000"); 137 test(100000000000000000UL, "100000000000000000"); 138 test(1000000000000000000UL, "1000000000000000000"); 139 test(10000000000000000000UL, "10000000000000000000"); 140 #ifndef TEST_HAS_NO_INT128 141 test(make_u128(10UL, 0), "100000000000000000000"); 142 test(make_u128(100UL, 0), "1000000000000000000000"); 143 test(make_u128(1000UL, 0), "10000000000000000000000"); 144 test(make_u128(10000UL, 0), "100000000000000000000000"); 145 test(make_u128(100000UL, 0), "1000000000000000000000000"); 146 test(make_u128(1000000UL, 0), "10000000000000000000000000"); 147 test(make_u128(10000000UL, 0), "100000000000000000000000000"); 148 test(make_u128(100000000UL, 0), "1000000000000000000000000000"); 149 test(make_u128(100UL, 0, 0), "10000000000000000000000000000"); 150 test(make_u128(1000UL, 0, 0), "100000000000000000000000000000"); 151 test(make_u128(10000UL, 0, 0), "1000000000000000000000000000000"); 152 test(make_u128(100000UL, 0, 0), "10000000000000000000000000000000"); 153 test(make_u128(1000000UL, 0, 0), "100000000000000000000000000000000"); 154 test(make_u128(10000000UL, 0, 0), "1000000000000000000000000000000000"); 155 test(make_u128(100000000UL, 0, 0), "10000000000000000000000000000000000"); 156 test(make_u128(1000000000UL, 0, 0), "100000000000000000000000000000000000"); 157 test(make_u128(10000000000UL, 0, 0), "1000000000000000000000000000000000000"); 158 test(make_u128(100000000000UL, 0, 0), "10000000000000000000000000000000000000"); 159 test(make_u128(1000000000000UL, 0, 0), "100000000000000000000000000000000000000"); 160 #endif 161 162 for (int b = 2; b < 37; ++b) 163 { 164 using xl = std::numeric_limits<T>; 165 166 test_value(1, b); 167 test_value(xl::lowest(), b); 168 test_value((xl::max)(), b); 169 test_value((xl::max)() / 2, b); 170 } 171 } 172 }; 173 174 template <typename T> 175 struct test_signed : to_chars_test_base<T> 176 { 177 using to_chars_test_base<T>::test; 178 using to_chars_test_base<T>::test_value; 179 180 TEST_CONSTEXPR_CXX23 void operator()() 181 { 182 test(-1, "-1"); 183 test(-12, "-12"); 184 test(-1, "-1", 10); 185 test(-12, "-12", 10); 186 test(-21734634, "-21734634", 10); 187 test(-2647, "-101001010111", 2); 188 test(-0xcc1, "-cc1", 16); 189 190 // Test each len till len of INT64_MAX = 19 because to_chars algorithm 191 // makes branches based on decimal digits count in the value string 192 // representation. 193 // Test driver automatically skips values not fitting into source type. 194 test(-1L, "-1"); 195 test(-12L, "-12"); 196 test(-123L, "-123"); 197 test(-1234L, "-1234"); 198 test(-12345L, "-12345"); 199 test(-123456L, "-123456"); 200 test(-1234567L, "-1234567"); 201 test(-12345678L, "-12345678"); 202 test(-123456789L, "-123456789"); 203 test(-1234567890L, "-1234567890"); 204 test(-12345678901L, "-12345678901"); 205 test(-123456789012L, "-123456789012"); 206 test(-1234567890123L, "-1234567890123"); 207 test(-12345678901234L, "-12345678901234"); 208 test(-123456789012345L, "-123456789012345"); 209 test(-1234567890123456L, "-1234567890123456"); 210 test(-12345678901234567L, "-12345678901234567"); 211 test(-123456789012345678L, "-123456789012345678"); 212 test(-1234567890123456789L, "-1234567890123456789"); 213 #ifndef TEST_HAS_NO_INT128 214 test(make_i128(-1L, 2345678901234567890L), "-12345678901234567890"); 215 test(make_i128(-12L, 3456789012345678901L), "-123456789012345678901"); 216 test(make_i128(-123L, 4567890123456789012L), "-1234567890123456789012"); 217 test(make_i128(-1234L, 5678901234567890123L), "-12345678901234567890123"); 218 test(make_i128(-12345L, 6789012345678901234L), "-123456789012345678901234"); 219 test(make_i128(-123456L, 7890123456789012345L), "-1234567890123456789012345"); 220 test(make_i128(-1234567L, 8901234567890123456L), "-12345678901234567890123456"); 221 test(make_i128(-12345678L, 9012345678901234567L), "-123456789012345678901234567"); 222 test(make_i128(-123456789L, 123456789012345678L), "-1234567890123456789012345678"); 223 test(make_i128(-1234567890L, 1234567890123456789L), "-12345678901234567890123456789"); 224 test(make_i128(-123L, 4567890123456L, 7890123456789L), "-12345678901234567890123456789"); 225 test(make_i128(-1234L, 5678901234567L, 8901234567890L), "-123456789012345678901234567890"); 226 test(make_i128(-12345L, 6789012345678L, 9012345678901L), "-1234567890123456789012345678901"); 227 test(make_i128(-123456L, 7890123456789L, 123456789012L), "-12345678901234567890123456789012"); 228 test(make_i128(-1234567L, 8901234567890L, 1234567890123L), "-123456789012345678901234567890123"); 229 test(make_i128(-12345678L, 9012345678901L, 2345678901234L), "-1234567890123456789012345678901234"); 230 test(make_i128(-123456789L, 123456789012L, 3456789012345L), "-12345678901234567890123456789012345"); 231 test(make_i128(-1234567890L, 1234567890123L, 4567890123456L), "-123456789012345678901234567890123456"); 232 test(make_i128(-12345678901L, 2345678901234L, 5678901234567L), "-1234567890123456789012345678901234567"); 233 test(make_i128(-123456789012L, 3456789012345L, 6789012345678L), "-12345678901234567890123456789012345678"); 234 test(make_i128(-1234567890123L, 4567890123456L, 7890123456789L), "-123456789012345678901234567890123456789"); 235 #endif 236 237 // Test special cases with zeros inside a value string representation, 238 // to_chars algorithm processes them in a special way and should not 239 // skip trailing zeros 240 // Test driver automatically skips values not fitting into source type. 241 test(-10L, "-10"); 242 test(-100L, "-100"); 243 test(-1000L, "-1000"); 244 test(-10000L, "-10000"); 245 test(-100000L, "-100000"); 246 test(-1000000L, "-1000000"); 247 test(-10000000L, "-10000000"); 248 test(-100000000L, "-100000000"); 249 test(-1000000000L, "-1000000000"); 250 test(-10000000000L, "-10000000000"); 251 test(-100000000000L, "-100000000000"); 252 test(-1000000000000L, "-1000000000000"); 253 test(-10000000000000L, "-10000000000000"); 254 test(-100000000000000L, "-100000000000000"); 255 test(-1000000000000000L, "-1000000000000000"); 256 test(-10000000000000000L, "-10000000000000000"); 257 test(-100000000000000000L, "-100000000000000000"); 258 test(-1000000000000000000L, "-1000000000000000000"); 259 #ifndef TEST_HAS_NO_INT128 260 test(make_i128(-1L, 0L), "-10000000000000000000"); 261 test(make_i128(-10L, 0L), "-100000000000000000000"); 262 test(make_i128(-100L, 0L), "-1000000000000000000000"); 263 test(make_i128(-1000L, 0L), "-10000000000000000000000"); 264 test(make_i128(-10000L, 0L), "-100000000000000000000000"); 265 test(make_i128(-100000L, 0L), "-1000000000000000000000000"); 266 test(make_i128(-1000000L, 0L), "-10000000000000000000000000"); 267 test(make_i128(-10000000L, 0L), "-100000000000000000000000000"); 268 test(make_i128(-100000000L, 0L), "-1000000000000000000000000000"); 269 test(make_i128(-1000000000L, 0L), "-10000000000000000000000000000"); 270 test(make_i128(-100L, 0L, 0L), "-10000000000000000000000000000"); 271 test(make_i128(-1000L, 0L, 0L), "-100000000000000000000000000000"); 272 test(make_i128(-10000L, 0L, 0L), "-1000000000000000000000000000000"); 273 test(make_i128(-100000L, 0L, 0L), "-10000000000000000000000000000000"); 274 test(make_i128(-1000000L, 0L, 0L), "-100000000000000000000000000000000"); 275 test(make_i128(-10000000L, 0L, 0L), "-1000000000000000000000000000000000"); 276 test(make_i128(-100000000L, 0L, 0L), "-10000000000000000000000000000000000"); 277 test(make_i128(-1000000000L, 0L, 0L), "-100000000000000000000000000000000000"); 278 test(make_i128(-10000000000L, 0L, 0L), "-1000000000000000000000000000000000000"); 279 test(make_i128(-100000000000L, 0L, 0L), "-10000000000000000000000000000000000000"); 280 test(make_i128(-1000000000000L, 0L, 0L), "-100000000000000000000000000000000000000"); 281 #endif 282 283 for (int b = 2; b < 37; ++b) 284 { 285 using xl = std::numeric_limits<T>; 286 287 test_value(0, b); 288 test_value(xl::lowest(), b); 289 test_value((xl::max)(), b); 290 } 291 } 292 }; 293 294 TEST_CONSTEXPR_CXX23 bool test() 295 { 296 run<test_basics>(integrals); 297 run<test_signed>(all_signed); 298 299 return true; 300 } 301 302 int main(int, char**) 303 { 304 test(); 305 #if TEST_STD_VER > 20 306 static_assert(test()); 307 #endif 308 309 return 0; 310 } 311