| //===-- Implementation of strncmp -----------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/string/strncmp.h" |
| |
| #include "src/__support/common.h" |
| #include <stddef.h> |
| |
| namespace __llvm_libc { |
| |
| // TODO: Look at benefits for comparing words at a time. |
| LLVM_LIBC_FUNCTION(int, strncmp, |
| (const char *left, const char *right, size_t n)) { |
| |
| if (n == 0) |
| return 0; |
| |
| for (; n > 1; --n, ++left, ++right) { |
| char lc = *left; |
| if (lc == '\0' || lc != *right) |
| break; |
| } |
| return *reinterpret_cast<const unsigned char *>(left) - |
| *reinterpret_cast<const unsigned char *>(right); |
| } |
| |
| } // namespace __llvm_libc |
