ladybird/Userland/Libraries/LibC/assert.h

/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#ifndef _ASSERT_H
#    define _ASSERT_H

#    define __stringify_helper(x) #x
#    define __stringify(x) __stringify_helper(x)

#    ifndef __cplusplus
#        define static_assert _Static_assert
#    endif
#endif

#include <sys/cdefs.h>

#undef assert

__BEGIN_DECLS

#ifndef NDEBUG
__attribute__((noreturn)) void __assertion_failed(char const* msg);
#    define assert(expr)                                                            \
        (__builtin_expect(!(expr), 0)                                               \
                ? __assertion_failed(#expr "\n" __FILE__ ":" __stringify(__LINE__)) \
                : (void)0)

#else
#    define assert(expr) ((void)(0))
#endif

__END_DECLS
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header. 2020-01-18 09:38:21 +01:00			`/*`
			`* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>`
			`*`
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt * 2021-04-22 01:24:48 -07:00			`* SPDX-License-Identifier: BSD-2-Clause`
Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header. 2020-01-18 09:38:21 +01:00			`*/`

LibC: Allow multiple includes of `<assert.h>` ISO C requires in section 7.2: The assert macro is redefined according to the current state of NDEBUG each time that <assert.h> is included. Also add tests for `assert` multiple inclusion accordingly. 2021-12-14 17:44:43 +01:00			`#ifndef _ASSERT_H`
			`# define _ASSERT_H`

Everywhere: Run clang-format 2022-10-17 00:06:11 +02:00			`# define __stringify_helper(x) #x`
LibC: Allow multiple includes of `<assert.h>` ISO C requires in section 7.2: The assert macro is redefined according to the current state of NDEBUG each time that <assert.h> is included. Also add tests for `assert` multiple inclusion accordingly. 2021-12-14 17:44:43 +01:00			`# define __stringify(x) __stringify_helper(x)`

			`# ifndef __cplusplus`
			`# define static_assert _Static_assert`
			`# endif`
			`#endif`
Canonicalize the path used by sh. With a bunch of LibC work to support the feature. LibC now initializes AK::StringImpl by default. It's now fine to use AK in LibC/Userland! :^) 2018-10-28 09:36:21 +01:00
A bunch of LibC boilerplate stuff added while trying to get figlet to build. 2018-10-31 02:09:11 +01:00			`#include <sys/cdefs.h>`

LibC: Allow multiple includes of `<assert.h>` ISO C requires in section 7.2: The assert macro is redefined according to the current state of NDEBUG each time that <assert.h> is included. Also add tests for `assert` multiple inclusion accordingly. 2021-12-14 17:44:43 +01:00			`#undef assert`

A bunch of LibC boilerplate stuff added while trying to get figlet to build. 2018-10-31 02:09:11 +01:00			`__BEGIN_DECLS`
Canonicalize the path used by sh. With a bunch of LibC work to support the feature. LibC now initializes AK::StringImpl by default. It's now fine to use AK in LibC/Userland! :^) 2018-10-28 09:36:21 +01:00
LibC: Use correct macro to disable assert() The C standard doesn't say anything about DEBUG, just NDEBUG :^) 2021-07-12 01:15:22 -06:00			`#ifndef NDEBUG`
Everywhere: Run clang-format 2022-04-01 20:58:27 +03:00			`__attribute__((noreturn)) void __assertion_failed(char const* msg);`
LibC: Replace use of do/while in assert() with the ternary operator It's a single expression, no do/while needed. This makes assert() work with the comma operator (assert(foo), assert(bar), assert(baz)). Found because exactly this is being used somewhere in the guts of LLVM. 2021-07-12 21:37:31 +01:00			`# define assert(expr) \`
			`(__builtin_expect(!(expr), 0) \`
			`? __assertion_failed(#expr "\n" __FILE__ ":" __stringify(__LINE__)) \`
LibC: Use C-style void cast in assert() 2021-07-13 19:02:20 +01:00			`: (void)0)`
LibC: Replace use of do/while in assert() with the ternary operator It's a single expression, no do/while needed. This makes assert() work with the comma operator (assert(foo), assert(bar), assert(baz)). Found because exactly this is being used somewhere in the guts of LLVM. 2021-07-12 21:37:31 +01:00
Put assertions behind a DEBUG flag to make it easy to build without them. 2019-04-23 21:52:02 +02:00			`#else`
LibC: Unbreak assert.h when compiled with a C compiler :^) 2020-12-23 21:23:41 +01:00			`# define assert(expr) ((void)(0))`
Put assertions behind a DEBUG flag to make it easy to build without them. 2019-04-23 21:52:02 +02:00			`#endif`

A bunch of LibC boilerplate stuff added while trying to get figlet to build. 2018-10-31 02:09:11 +01:00			`__END_DECLS`