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/string/memory_utils/inline_strstr.h" 14 15 namespace LIBC_NAMESPACE_DECL { 16 17 // TODO: This is a simple brute force implementation. This can be 18 // improved upon using well known string matching algorithms. 19 LLVM_LIBC_FUNCTION(char *, strstr, (const char *haystack, const char *needle)) { 20 auto comp = [](char l, char r) -> int { return l - r; }; 21 return inline_strstr(haystack, needle, comp); 22 } 23 24 } // namespace LIBC_NAMESPACE_DECL 25