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Diffstat (limited to 'third_party/abseil-cpp/absl/strings/internal/numbers_test_common.h')
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1 files changed, 184 insertions, 0 deletions
diff --git a/third_party/abseil-cpp/absl/strings/internal/numbers_test_common.h b/third_party/abseil-cpp/absl/strings/internal/numbers_test_common.h new file mode 100644 index 0000000000..1a1e50c4d8 --- /dev/null +++ b/third_party/abseil-cpp/absl/strings/internal/numbers_test_common.h @@ -0,0 +1,184 @@ +// Copyright 2017 The Abseil Authors. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// +// This file contains common things needed by numbers_test.cc, +// numbers_legacy_test.cc and numbers_benchmark.cc. + +#ifndef ABSL_STRINGS_INTERNAL_NUMBERS_TEST_COMMON_H_ +#define ABSL_STRINGS_INTERNAL_NUMBERS_TEST_COMMON_H_ + +#include <array> +#include <cstdint> +#include <limits> +#include <string> + +#include "absl/base/config.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace strings_internal { + +template <typename IntType> +inline bool Itoa(IntType value, int base, std::string* destination) { + destination->clear(); + if (base <= 1 || base > 36) { + return false; + } + + if (value == 0) { + destination->push_back('0'); + return true; + } + + bool negative = value < 0; + while (value != 0) { + const IntType next_value = value / base; + // Can't use std::abs here because of problems when IntType is unsigned. + int remainder = + static_cast<int>(value > next_value * base ? value - next_value * base + : next_value * base - value); + char c = remainder < 10 ? '0' + remainder : 'A' + remainder - 10; + destination->insert(0, 1, c); + value = next_value; + } + + if (negative) { + destination->insert(0, 1, '-'); + } + return true; +} + +struct uint32_test_case { + const char* str; + bool expect_ok; + int base; // base to pass to the conversion function + uint32_t expected; +}; + +inline const std::array<uint32_test_case, 27>& strtouint32_test_cases() { + static const std::array<uint32_test_case, 27> test_cases{{ + {"0xffffffff", true, 16, (std::numeric_limits<uint32_t>::max)()}, + {"0x34234324", true, 16, 0x34234324}, + {"34234324", true, 16, 0x34234324}, + {"0", true, 16, 0}, + {" \t\n 0xffffffff", true, 16, (std::numeric_limits<uint32_t>::max)()}, + {" \f\v 46", true, 10, 46}, // must accept weird whitespace + {" \t\n 72717222", true, 8, 072717222}, + {" \t\n 072717222", true, 8, 072717222}, + {" \t\n 072717228", false, 8, 07271722}, + {"0", true, 0, 0}, + + // Base-10 version. + {"34234324", true, 0, 34234324}, + {"4294967295", true, 0, (std::numeric_limits<uint32_t>::max)()}, + {"34234324 \n\t", true, 10, 34234324}, + + // Unusual base + {"0", true, 3, 0}, + {"2", true, 3, 2}, + {"11", true, 3, 4}, + + // Invalid uints. + {"", false, 0, 0}, + {" ", false, 0, 0}, + {"abc", false, 0, 0}, // would be valid hex, but prefix is missing + {"34234324a", false, 0, 34234324}, + {"34234.3", false, 0, 34234}, + {"-1", false, 0, 0}, + {" -123", false, 0, 0}, + {" \t\n -123", false, 0, 0}, + + // Out of bounds. + {"4294967296", false, 0, (std::numeric_limits<uint32_t>::max)()}, + {"0x100000000", false, 0, (std::numeric_limits<uint32_t>::max)()}, + {nullptr, false, 0, 0}, + }}; + return test_cases; +} + +struct uint64_test_case { + const char* str; + bool expect_ok; + int base; + uint64_t expected; +}; + +inline const std::array<uint64_test_case, 34>& strtouint64_test_cases() { + static const std::array<uint64_test_case, 34> test_cases{{ + {"0x3423432448783446", true, 16, int64_t{0x3423432448783446}}, + {"3423432448783446", true, 16, int64_t{0x3423432448783446}}, + + {"0", true, 16, 0}, + {"000", true, 0, 0}, + {"0", true, 0, 0}, + {" \t\n 0xffffffffffffffff", true, 16, + (std::numeric_limits<uint64_t>::max)()}, + + {"012345670123456701234", true, 8, int64_t{012345670123456701234}}, + {"12345670123456701234", true, 8, int64_t{012345670123456701234}}, + + {"12845670123456701234", false, 8, 0}, + + // Base-10 version. + {"34234324487834466", true, 0, int64_t{34234324487834466}}, + + {" \t\n 18446744073709551615", true, 0, + (std::numeric_limits<uint64_t>::max)()}, + + {"34234324487834466 \n\t ", true, 0, int64_t{34234324487834466}}, + + {" \f\v 46", true, 10, 46}, // must accept weird whitespace + + // Unusual base + {"0", true, 3, 0}, + {"2", true, 3, 2}, + {"11", true, 3, 4}, + + {"0", true, 0, 0}, + + // Invalid uints. + {"", false, 0, 0}, + {" ", false, 0, 0}, + {"abc", false, 0, 0}, + {"34234324487834466a", false, 0, 0}, + {"34234487834466.3", false, 0, 0}, + {"-1", false, 0, 0}, + {" -123", false, 0, 0}, + {" \t\n -123", false, 0, 0}, + + // Out of bounds. + {"18446744073709551616", false, 10, 0}, + {"18446744073709551616", false, 0, 0}, + {"0x10000000000000000", false, 16, + (std::numeric_limits<uint64_t>::max)()}, + {"0X10000000000000000", false, 16, + (std::numeric_limits<uint64_t>::max)()}, // 0X versus 0x. + {"0x10000000000000000", false, 0, (std::numeric_limits<uint64_t>::max)()}, + {"0X10000000000000000", false, 0, + (std::numeric_limits<uint64_t>::max)()}, // 0X versus 0x. + + {"0x1234", true, 16, 0x1234}, + + // Base-10 std::string version. + {"1234", true, 0, 1234}, + {nullptr, false, 0, 0}, + }}; + return test_cases; +} + +} // namespace strings_internal +ABSL_NAMESPACE_END +} // namespace absl + +#endif // ABSL_STRINGS_INTERNAL_NUMBERS_TEST_COMMON_H_ |