| 1 | //===-- Implementation of strstr ------------------------------------------===// |
|---|---|
| 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 | #include "src/string/strstr.h" |
| 10 | |
| 11 | #include "src/__support/common.h" |
| 12 | #include "src/__support/macros/config.h" |
| 13 | #include "src/__support/macros/null_check.h" |
| 14 | #include "src/string/memory_utils/inline_strstr.h" |
| 15 | |
| 16 | namespace LIBC_NAMESPACE_DECL { |
| 17 | |
| 18 | // TODO: This is a simple brute force implementation. This can be |
| 19 | // improved upon using well known string matching algorithms. |
| 20 | LLVM_LIBC_FUNCTION(char *, strstr, (const char *haystack, const char *needle)) { |
| 21 | auto comp = [](char l, char r) -> int { return l - r; }; |
| 22 | LIBC_CRASH_ON_NULLPTR(haystack); |
| 23 | LIBC_CRASH_ON_NULLPTR(needle); |
| 24 | return inline_strstr(haystack, needle, comp); |
| 25 | } |
| 26 | |
| 27 | } // namespace LIBC_NAMESPACE_DECL |
| 28 |