libc/src/stdlib/qsort.cpp

   1 //===-- Implementation of qsort -------------------------------------------===//
   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/stdlib/qsort.h"
  10 #include "src/__support/common.h"
  11 #include "src/stdlib/qsort_util.h"
  12
  13 #include <stdint.h>
  14
  15 namespace LIBC_NAMESPACE {
  16
  17 LLVM_LIBC_FUNCTION(void, qsort,
  18                    (void *array, size_t array_size, size_t elem_size,
  19                     int (*compare)(const void *, const void *))) {
  20   if (array == nullptr || array_size == 0 || elem_size == 0)
  21     return;
  22   internal::Comparator c(compare);
  23   internal::quicksort(internal::Array(reinterpret_cast<uint8_t *>(array),
  24                                       array_size, elem_size, c));
  25 }
  26
  27 } // namespace LIBC_NAMESPACE