libc/src/string/strncasecmp.cpp

   1 //===-- Implementation of strncasecmp -------------------------------------===//
   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/strncasecmp.h"
  10
  11 #include "src/__support/common.h"
  12 #include "src/__support/ctype_utils.h"
  13 #include "src/__support/macros/config.h"
  14 #include "src/string/memory_utils/inline_strcmp.h"
  15
  16 namespace LIBC_NAMESPACE_DECL {
  17
  18 LLVM_LIBC_FUNCTION(int, strncasecmp,
  19                    (const char *left, const char *right, size_t n)) {
  20   auto case_cmp = [](char a, char b) {
  21     return LIBC_NAMESPACE::internal::tolower(a) -
  22            LIBC_NAMESPACE::internal::tolower(b);
  23   };
  24   return inline_strncmp(left, right, n, case_cmp);
  25 }
  26
  27 } // namespace LIBC_NAMESPACE_DECL