2010-05-12 03:42:16 +08:00
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// -*- C++ -*-
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2021-11-18 05:25:01 +08:00
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//===----------------------------------------------------------------------===//
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2010-05-12 03:42:16 +08:00
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//
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2019-01-19 18:56:40 +08:00
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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2010-05-12 03:42:16 +08:00
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_CSTDLIB
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#define _LIBCPP_CSTDLIB
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/*
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cstdlib synopsis
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Macros:
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EXIT_FAILURE
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EXIT_SUCCESS
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MB_CUR_MAX
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NULL
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RAND_MAX
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2010-08-22 08:02:43 +08:00
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2010-05-12 03:42:16 +08:00
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namespace std
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{
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Types:
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size_t
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div_t
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ldiv_t
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lldiv_t // C99
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double atof (const char* nptr);
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int atoi (const char* nptr);
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long atol (const char* nptr);
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long long atoll(const char* nptr); // C99
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double strtod (const char* restrict nptr, char** restrict endptr);
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float strtof (const char* restrict nptr, char** restrict endptr); // C99
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long double strtold (const char* restrict nptr, char** restrict endptr); // C99
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long strtol (const char* restrict nptr, char** restrict endptr, int base);
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long long strtoll (const char* restrict nptr, char** restrict endptr, int base); // C99
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unsigned long strtoul (const char* restrict nptr, char** restrict endptr, int base);
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unsigned long long strtoull(const char* restrict nptr, char** restrict endptr, int base); // C99
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int rand(void);
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void srand(unsigned int seed);
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void* calloc(size_t nmemb, size_t size);
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void free(void* ptr);
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void* malloc(size_t size);
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void* realloc(void* ptr, size_t size);
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void abort(void);
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int atexit(void (*func)(void));
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void exit(int status);
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void _Exit(int status);
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char* getenv(const char* name);
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int system(const char* string);
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void* bsearch(const void* key, const void* base, size_t nmemb, size_t size,
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int (*compar)(const void *, const void *));
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void qsort(void* base, size_t nmemb, size_t size,
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int (*compar)(const void *, const void *));
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int abs( int j);
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long abs( long j);
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long long abs(long long j); // C++0X
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long labs( long j);
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long long llabs(long long j); // C99
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div_t div( int numer, int denom);
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ldiv_t div( long numer, long denom);
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2010-08-22 08:02:43 +08:00
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lldiv_t div(long long numer, long long denom); // C++0X
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2010-05-12 03:42:16 +08:00
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ldiv_t ldiv( long numer, long denom);
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lldiv_t lldiv(long long numer, long long denom); // C99
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int mblen(const char* s, size_t n);
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int mbtowc(wchar_t* restrict pwc, const char* restrict s, size_t n);
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int wctomb(char* s, wchar_t wchar);
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size_t mbstowcs(wchar_t* restrict pwcs, const char* restrict s, size_t n);
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size_t wcstombs(char* restrict s, const wchar_t* restrict pwcs, size_t n);
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2012-10-14 02:03:53 +08:00
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int at_quick_exit(void (*func)(void)) // C++11
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void quick_exit(int status); // C++11
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void *aligned_alloc(size_t alignment, size_t size); // C11
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2010-05-12 03:42:16 +08:00
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} // std
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*/
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2022-03-26 00:55:36 +08:00
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#include <__assert> // all public C++ headers provide the assertion handler
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2010-05-12 03:42:16 +08:00
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#include <__config>
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#include <stdlib.h>
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2011-10-18 04:05:10 +08:00
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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2022-02-02 09:16:40 +08:00
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# pragma GCC system_header
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2011-10-18 04:05:10 +08:00
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#endif
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2010-05-12 03:42:16 +08:00
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_LIBCPP_BEGIN_NAMESPACE_STD
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[libc++] Use the using_if_exists attribute when provided
As discussed on cfe-dev [1], use the using_if_exists Clang attribute when
the compiler supports it. This makes it easier to port libc++ on top of
new platforms that don't fully support the C Standard library.
Previously, libc++ would fail to build when trying to import a missing
declaration in a <cXXXX> header. With the attribute, the declaration will
simply not be imported into namespace std, and hence it won't be available
for libc++ to use. In many cases, the declarations were *not* actually
required for libc++ to work (they were only surfaced for users to use
them as std::XXXX), so not importing them into namespace std is acceptable.
The same thing could be achieved by conscious usage of `#ifdef` along
with platform detection, however that quickly creates a maintenance
problem as libc++ is ported to new platforms. Furthermore, this problem
is exacerbated when mixed with vendor internal-only platforms, which can
lead to difficulties maintaining a downstream fork of the library.
For the time being, we only use the using_if_exists attribute when it
is supported. At some point in the future, we will start removing #ifdef
paths that are unnecessary when the attribute is supported, and folks
who need those #ifdef paths will be required to use a compiler that
supports the attribute.
[1]: http://lists.llvm.org/pipermail/cfe-dev/2020-June/066038.html
Differential Revision: https://reviews.llvm.org/D90257
2021-06-02 22:41:37 +08:00
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using ::size_t _LIBCPP_USING_IF_EXISTS;
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using ::div_t _LIBCPP_USING_IF_EXISTS;
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using ::ldiv_t _LIBCPP_USING_IF_EXISTS;
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using ::lldiv_t _LIBCPP_USING_IF_EXISTS;
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using ::atof _LIBCPP_USING_IF_EXISTS;
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using ::atoi _LIBCPP_USING_IF_EXISTS;
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using ::atol _LIBCPP_USING_IF_EXISTS;
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using ::atoll _LIBCPP_USING_IF_EXISTS;
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using ::strtod _LIBCPP_USING_IF_EXISTS;
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using ::strtof _LIBCPP_USING_IF_EXISTS;
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using ::strtold _LIBCPP_USING_IF_EXISTS;
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using ::strtol _LIBCPP_USING_IF_EXISTS;
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using ::strtoll _LIBCPP_USING_IF_EXISTS;
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using ::strtoul _LIBCPP_USING_IF_EXISTS;
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using ::strtoull _LIBCPP_USING_IF_EXISTS;
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using ::rand _LIBCPP_USING_IF_EXISTS;
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using ::srand _LIBCPP_USING_IF_EXISTS;
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using ::calloc _LIBCPP_USING_IF_EXISTS;
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using ::free _LIBCPP_USING_IF_EXISTS;
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using ::malloc _LIBCPP_USING_IF_EXISTS;
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using ::realloc _LIBCPP_USING_IF_EXISTS;
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using ::abort _LIBCPP_USING_IF_EXISTS;
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using ::atexit _LIBCPP_USING_IF_EXISTS;
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using ::exit _LIBCPP_USING_IF_EXISTS;
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using ::_Exit _LIBCPP_USING_IF_EXISTS;
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using ::getenv _LIBCPP_USING_IF_EXISTS;
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using ::system _LIBCPP_USING_IF_EXISTS;
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using ::bsearch _LIBCPP_USING_IF_EXISTS;
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using ::qsort _LIBCPP_USING_IF_EXISTS;
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using ::abs _LIBCPP_USING_IF_EXISTS;
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using ::labs _LIBCPP_USING_IF_EXISTS;
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using ::llabs _LIBCPP_USING_IF_EXISTS;
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using ::div _LIBCPP_USING_IF_EXISTS;
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using ::ldiv _LIBCPP_USING_IF_EXISTS;
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using ::lldiv _LIBCPP_USING_IF_EXISTS;
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using ::mblen _LIBCPP_USING_IF_EXISTS;
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using ::mbtowc _LIBCPP_USING_IF_EXISTS;
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using ::wctomb _LIBCPP_USING_IF_EXISTS;
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using ::mbstowcs _LIBCPP_USING_IF_EXISTS;
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using ::wcstombs _LIBCPP_USING_IF_EXISTS;
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2021-08-18 21:08:17 +08:00
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#if !defined(_LIBCPP_CXX03_LANG)
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[libc++] Use the using_if_exists attribute when provided
As discussed on cfe-dev [1], use the using_if_exists Clang attribute when
the compiler supports it. This makes it easier to port libc++ on top of
new platforms that don't fully support the C Standard library.
Previously, libc++ would fail to build when trying to import a missing
declaration in a <cXXXX> header. With the attribute, the declaration will
simply not be imported into namespace std, and hence it won't be available
for libc++ to use. In many cases, the declarations were *not* actually
required for libc++ to work (they were only surfaced for users to use
them as std::XXXX), so not importing them into namespace std is acceptable.
The same thing could be achieved by conscious usage of `#ifdef` along
with platform detection, however that quickly creates a maintenance
problem as libc++ is ported to new platforms. Furthermore, this problem
is exacerbated when mixed with vendor internal-only platforms, which can
lead to difficulties maintaining a downstream fork of the library.
For the time being, we only use the using_if_exists attribute when it
is supported. At some point in the future, we will start removing #ifdef
paths that are unnecessary when the attribute is supported, and folks
who need those #ifdef paths will be required to use a compiler that
supports the attribute.
[1]: http://lists.llvm.org/pipermail/cfe-dev/2020-June/066038.html
Differential Revision: https://reviews.llvm.org/D90257
2021-06-02 22:41:37 +08:00
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using ::at_quick_exit _LIBCPP_USING_IF_EXISTS;
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using ::quick_exit _LIBCPP_USING_IF_EXISTS;
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2012-03-14 22:10:37 +08:00
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#endif
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2021-08-18 21:08:17 +08:00
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#if _LIBCPP_STD_VER > 14
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[libc++] Use the using_if_exists attribute when provided
As discussed on cfe-dev [1], use the using_if_exists Clang attribute when
the compiler supports it. This makes it easier to port libc++ on top of
new platforms that don't fully support the C Standard library.
Previously, libc++ would fail to build when trying to import a missing
declaration in a <cXXXX> header. With the attribute, the declaration will
simply not be imported into namespace std, and hence it won't be available
for libc++ to use. In many cases, the declarations were *not* actually
required for libc++ to work (they were only surfaced for users to use
them as std::XXXX), so not importing them into namespace std is acceptable.
The same thing could be achieved by conscious usage of `#ifdef` along
with platform detection, however that quickly creates a maintenance
problem as libc++ is ported to new platforms. Furthermore, this problem
is exacerbated when mixed with vendor internal-only platforms, which can
lead to difficulties maintaining a downstream fork of the library.
For the time being, we only use the using_if_exists attribute when it
is supported. At some point in the future, we will start removing #ifdef
paths that are unnecessary when the attribute is supported, and folks
who need those #ifdef paths will be required to use a compiler that
supports the attribute.
[1]: http://lists.llvm.org/pipermail/cfe-dev/2020-June/066038.html
Differential Revision: https://reviews.llvm.org/D90257
2021-06-02 22:41:37 +08:00
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using ::aligned_alloc _LIBCPP_USING_IF_EXISTS;
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2012-10-14 02:03:53 +08:00
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#endif
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2010-05-12 03:42:16 +08:00
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_LIBCPP_END_NAMESPACE_STD
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2021-04-21 00:03:32 +08:00
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#endif // _LIBCPP_CSTDLIB
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