libc/src/string/strstr.cpp

   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/string/memory_utils/strstr_implementations.h"
  13
  14 namespace __llvm_libc {
  15
  16 // TODO: This is a simple brute force implementation. This can be
  17 // improved upon using well known string matching algorithms.
  18 LLVM_LIBC_FUNCTION(char *, strstr, (const char *haystack, const char *needle)) {
  19   auto comp = [](char l, char r) -> int { return l - r; };
  20   return strstr_implementation(haystack, needle, comp);
  21 }
  22
  23 } // namespace __llvm_libc