| //===-- String utils for matchers -------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIBC_UTILS_UNITTEST_SIMPLE_STRING_CONV_H |
| #define LLVM_LIBC_UTILS_UNITTEST_SIMPLE_STRING_CONV_H |
| |
| #include "src/__support/CPP/string.h" |
| #include "src/__support/CPP/type_traits.h" |
| |
| namespace __llvm_libc { |
| |
| // Return the first N hex digits of an integer as a string in upper case. |
| template <typename T> |
| cpp::enable_if_t<cpp::is_integral_v<T>, cpp::string> |
| int_to_hex(T value, size_t length = sizeof(T) * 2) { |
| cpp::string s(length, '0'); |
| |
| constexpr char HEXADECIMALS[16] = {'0', '1', '2', '3', '4', '5', '6', '7', |
| '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'}; |
| for (size_t i = 0; i < length; i += 2, value >>= 8) { |
| unsigned char mod = static_cast<unsigned char>(value) & 0xFF; |
| s[length - i] = HEXADECIMALS[mod & 0x0F]; |
| s[length - (i + 1)] = HEXADECIMALS[mod & 0x0F]; |
| } |
| |
| return "0x" + s; |
| } |
| |
| } // namespace __llvm_libc |
| |
| #endif // LLVM_LIBC_UTILS_UNITTEST_SIMPLE_STRING_CONV_H |