libc/src/string/memory_utils/strstr_implementations.h

   1 //===-- str{,case}str 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_STRSTR_IMPLEMENTATIONS_H
  10 #define LLVM_LIBC_SRC_STRING_MEMORY_UTILS_STRSTR_IMPLEMENTATIONS_H
  11
  12 #include "src/string/memory_utils/memmem_implementations.h"
  13 #include "src/string/string_utils.h"
  14 #include <stddef.h>
  15
  16 namespace __llvm_libc {
  17
  18 template <typename Comp>
  19 constexpr static char *strstr_implementation(const char *haystack,
  20                                              const char *needle, Comp &&comp) {
  21   void *result = memmem_implementation(
  22       static_cast<const void *>(haystack), internal::string_length(haystack),
  23       static_cast<const void *>(needle), internal::string_length(needle), comp);
  24   return static_cast<char *>(result);
  25 }
  26
  27 } // namespace __llvm_libc
  28
  29 #endif // LLVM_LIBC_SRC_STRING_MEMORY_UTILS_STRSTR_IMPLEMENTATIONS_H