1 //===-- str{,case}cmp implementation ----------------------------*- C++ -*-===// 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 #ifndef LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_STRCMP_H 10 #define LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_STRCMP_H 11 12 #include "src/__support/macros/config.h" 13 #include <stddef.h> 14 15 namespace LIBC_NAMESPACE_DECL { 16 17 template <typename Comp> 18 LIBC_INLINE constexpr int inline_strcmp(const char *left, const char *right, 19 Comp &&comp) { 20 // TODO: Look at benefits for comparing words at a time. 21 for (; *left && !comp(*left, *right); ++left, ++right) 22 ; 23 return comp(*reinterpret_cast<const unsigned char *>(left), 24 *reinterpret_cast<const unsigned char *>(right)); 25 } 26 27 template <typename Comp> 28 LIBC_INLINE constexpr int inline_strncmp(const char *left, const char *right, 29 size_t n, Comp &&comp) { 30 if (n == 0) 31 return 0; 32 33 // TODO: Look at benefits for comparing words at a time. 34 for (; n > 1; --n, ++left, ++right) { 35 char lc = *left; 36 if (!comp(lc, '\0') || comp(lc, *right)) 37 break; 38 } 39 return comp(*reinterpret_cast<const unsigned char *>(left), 40 *reinterpret_cast<const unsigned char *>(right)); 41 } 42 43 } // namespace LIBC_NAMESPACE_DECL 44 45 #endif // LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_STRCMP_H 46