libcxx/include/stdlib.h

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #if defined(__need_malloc_and_calloc)
  11
  12 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  13 #  pragma GCC system_header
  14 #endif
  15
  16 #include_next <stdlib.h>
  17
  18 #elif !defined(_LIBCPP_STDLIB_H)
  19 #define _LIBCPP_STDLIB_H
  20
  21 /*
  22     stdlib.h synopsis
  23
  24 Macros:
  25
  26     EXIT_FAILURE
  27     EXIT_SUCCESS
  28     MB_CUR_MAX
  29     NULL
  30     RAND_MAX
  31
  32 Types:
  33
  34     size_t
  35     div_t
  36     ldiv_t
  37     lldiv_t                                                               // C99
  38
  39 double    atof (const char* nptr);
  40 int       atoi (const char* nptr);
  41 long      atol (const char* nptr);
  42 long long atoll(const char* nptr);                                        // C99
  43 double             strtod  (const char* restrict nptr, char** restrict endptr);
  44 float              strtof  (const char* restrict nptr, char** restrict endptr); // C99
  45 long double        strtold (const char* restrict nptr, char** restrict endptr); // C99
  46 long               strtol  (const char* restrict nptr, char** restrict endptr, int base);
  47 long long          strtoll (const char* restrict nptr, char** restrict endptr, int base); // C99
  48 unsigned long      strtoul (const char* restrict nptr, char** restrict endptr, int base);
  49 unsigned long long strtoull(const char* restrict nptr, char** restrict endptr, int base); // C99
  50 int rand(void);
  51 void srand(unsigned int seed);
  52 void* calloc(size_t nmemb, size_t size);
  53 void free(void* ptr);
  54 void* malloc(size_t size);
  55 void* realloc(void* ptr, size_t size);
  56 void abort(void);
  57 int atexit(void (*func)(void));
  58 void exit(int status);
  59 void _Exit(int status);
  60 char* getenv(const char* name);
  61 int system(const char* string);
  62 void* bsearch(const void* key, const void* base, size_t nmemb, size_t size,
  63               int (*compar)(const void *, const void *));
  64 void qsort(void* base, size_t nmemb, size_t size,
  65            int (*compar)(const void *, const void *));
  66 int         abs(      int j);
  67 long        abs(     long j);
  68 long long   abs(long long j);                                             // C++0X
  69 long       labs(     long j);
  70 long long llabs(long long j);                                             // C99
  71 div_t     div(      int numer,       int denom);
  72 ldiv_t    div(     long numer,      long denom);
  73 lldiv_t   div(long long numer, long long denom);                          // C++0X
  74 ldiv_t   ldiv(     long numer,      long denom);
  75 lldiv_t lldiv(long long numer, long long denom);                          // C99
  76 int mblen(const char* s, size_t n);
  77 int mbtowc(wchar_t* restrict pwc, const char* restrict s, size_t n);
  78 int wctomb(char* s, wchar_t wchar);
  79 size_t mbstowcs(wchar_t* restrict pwcs, const char* restrict s, size_t n);
  80 size_t wcstombs(char* restrict s, const wchar_t* restrict pwcs, size_t n);
  81 int at_quick_exit(void (*func)(void))                                     // C++11
  82 void quick_exit(int status);                                              // C++11
  83 void *aligned_alloc(size_t alignment, size_t size);                       // C11
  84
  85 */
  86
  87 #include <__config>
  88
  89 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  90 #  pragma GCC system_header
  91 #endif
  92
  93 #  if __has_include_next(<stdlib.h>)
  94 #    include_next <stdlib.h>
  95 #  endif
  96
  97 #ifdef __cplusplus
  98 extern "C++" {
  99 // abs
 100
 101 #ifdef abs
 102 # undef abs
 103 #endif
 104 #ifdef labs
 105 # undef labs
 106 #endif
 107 #ifdef llabs
 108 # undef llabs
 109 #endif
 110
 111 // MSVCRT already has the correct prototype in <stdlib.h> if __cplusplus is defined
 112 #if !defined(_LIBCPP_MSVCRT)
 113 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY long abs(long __x) _NOEXCEPT {
 114   return __builtin_labs(__x);
 115 }
 116 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY long long abs(long long __x) _NOEXCEPT {
 117   return __builtin_llabs(__x);
 118 }
 119 #endif // !defined(_LIBCPP_MSVCRT)
 120
 121 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY float abs(float __lcpp_x) _NOEXCEPT {
 122   return __builtin_fabsf(__lcpp_x); // Use builtins to prevent needing math.h
 123 }
 124
 125 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY double abs(double __lcpp_x) _NOEXCEPT {
 126   return __builtin_fabs(__lcpp_x);
 127 }
 128
 129 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY long double
 130 abs(long double __lcpp_x) _NOEXCEPT {
 131   return __builtin_fabsl(__lcpp_x);
 132 }
 133
 134 // div
 135
 136 #ifdef div
 137 # undef div
 138 #endif
 139 #ifdef ldiv
 140 # undef ldiv
 141 #endif
 142 #ifdef lldiv
 143 # undef lldiv
 144 #endif
 145
 146 // MSVCRT already has the correct prototype in <stdlib.h> if __cplusplus is defined
 147 #if !defined(_LIBCPP_MSVCRT)
 148 inline _LIBCPP_INLINE_VISIBILITY ldiv_t div(long __x, long __y) _NOEXCEPT {
 149   return ::ldiv(__x, __y);
 150 }
 151 #if !(defined(__FreeBSD__) && !defined(__LONG_LONG_SUPPORTED))
 152 inline _LIBCPP_INLINE_VISIBILITY lldiv_t div(long long __x,
 153                                              long long __y) _NOEXCEPT {
 154   return ::lldiv(__x, __y);
 155 }
 156 #endif
 157 #endif // _LIBCPP_MSVCRT
 158 } // extern "C++"
 159 #endif // __cplusplus
 160
 161 #endif // _LIBCPP_STDLIB_H