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Editing: stdlib.h

// -*- C++ -*-
//===--------------------------- stdlib.h ---------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#if defined(__need_malloc_and_calloc)

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif

#include_next <stdlib.h>

#elif !defined(_LIBCPP_STDLIB_H)
#define _LIBCPP_STDLIB_H

/*
    stdlib.h synopsis

Macros:

EXIT_FAILURE
    EXIT_SUCCESS
    MB_CUR_MAX
    NULL
    RAND_MAX

Types:

size_t
    div_t
    ldiv_t
    lldiv_t                                                               // C99

double    atof (const char* nptr);
int       atoi (const char* nptr);
long      atol (const char* nptr);
long long atoll(const char* nptr);                                        // C99
double             strtod  (const char* restrict nptr, char** restrict endptr);
float              strtof  (const char* restrict nptr, char** restrict endptr); // C99
long double        strtold (const char* restrict nptr, char** restrict endptr); // C99
long               strtol  (const char* restrict nptr, char** restrict endptr, int base);
long long          strtoll (const char* restrict nptr, char** restrict endptr, int base); // C99
unsigned long      strtoul (const char* restrict nptr, char** restrict endptr, int base);
unsigned long long strtoull(const char* restrict nptr, char** restrict endptr, int base); // C99
int rand(void);
void srand(unsigned int seed);
void* calloc(size_t nmemb, size_t size);
void free(void* ptr);
void* malloc(size_t size);
void* realloc(void* ptr, size_t size);
void abort(void);
int atexit(void (*func)(void));
void exit(int status);
void _Exit(int status);
char* getenv(const char* name);
int system(const char* string);
void* bsearch(const void* key, const void* base, size_t nmemb, size_t size,
              int (*compar)(const void *, const void *));
void qsort(void* base, size_t nmemb, size_t size,
           int (*compar)(const void *, const void *));
int         abs(      int j);
long        abs(     long j);
long long   abs(long long j);                                             // C++0X
long       labs(     long j);
long long llabs(long long j);                                             // C99
div_t     div(      int numer,       int denom);
ldiv_t    div(     long numer,      long denom);
lldiv_t   div(long long numer, long long denom);                          // C++0X
ldiv_t   ldiv(     long numer,      long denom);
lldiv_t lldiv(long long numer, long long denom);                          // C99
int mblen(const char* s, size_t n);
int mbtowc(wchar_t* restrict pwc, const char* restrict s, size_t n);
int wctomb(char* s, wchar_t wchar);
size_t mbstowcs(wchar_t* restrict pwcs, const char* restrict s, size_t n);
size_t wcstombs(char* restrict s, const wchar_t* restrict pwcs, size_t n);
int at_quick_exit(void (*func)(void))                                     // C++11
void quick_exit(int status);                                              // C++11
void *aligned_alloc(size_t alignment, size_t size);                       // C11

#include <__config>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif

#include_next <stdlib.h>

#ifdef __cplusplus
extern "C++" {
// abs

#undef abs
#undef labs
#ifndef _LIBCPP_HAS_NO_LONG_LONG
#undef llabs
#endif

// MSVCRT already has the correct prototype in <stdlib.h> if __cplusplus is defined
#if !defined(_LIBCPP_MSVCRT) && !defined(__sun__) && !defined(_AIX)
inline _LIBCPP_INLINE_VISIBILITY long abs(long __x) _NOEXCEPT {
  return __builtin_labs(__x);
}
#ifndef _LIBCPP_HAS_NO_LONG_LONG
inline _LIBCPP_INLINE_VISIBILITY long long abs(long long __x) _NOEXCEPT {
  return __builtin_llabs(__x);
}
#endif // _LIBCPP_HAS_NO_LONG_LONG
#endif // !defined(_LIBCPP_MSVCRT) && !defined(__sun__) && !defined(_AIX)

#if !(defined(_AIX) || defined(__sun__))
inline _LIBCPP_INLINE_VISIBILITY float abs(float __lcpp_x) _NOEXCEPT {
  return __builtin_fabsf(__lcpp_x); // Use builtins to prevent needing math.h
}

inline _LIBCPP_INLINE_VISIBILITY double abs(double __lcpp_x) _NOEXCEPT {
  return __builtin_fabs(__lcpp_x);
}

inline _LIBCPP_INLINE_VISIBILITY long double
abs(long double __lcpp_x) _NOEXCEPT {
  return __builtin_fabsl(__lcpp_x);
}
#endif // !(defined(_AIX) || defined(__sun__))

// div

#undef div
#undef ldiv
#ifndef _LIBCPP_HAS_NO_LONG_LONG
#undef lldiv
#endif

// MSVCRT already has the correct prototype in <stdlib.h> if __cplusplus is defined
#if !defined(_LIBCPP_MSVCRT) && !defined(__sun__) && !defined(_AIX)
inline _LIBCPP_INLINE_VISIBILITY ldiv_t div(long __x, long __y) _NOEXCEPT {
  return ::ldiv(__x, __y);
}
#ifndef _LIBCPP_HAS_NO_LONG_LONG
inline _LIBCPP_INLINE_VISIBILITY lldiv_t div(long long __x,
                                             long long __y) _NOEXCEPT {
  return ::lldiv(__x, __y);
}
#endif // _LIBCPP_HAS_NO_LONG_LONG
#endif // _LIBCPP_MSVCRT / __sun__ / _AIX
} // extern "C++"
#endif  // __cplusplus

#endif  // _LIBCPP_STDLIB_H

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Editing: stdlib.h

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