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			663 lines
		
	
	
		
			26 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			663 lines
		
	
	
		
			26 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| /*
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|   Simple DirectMedia Layer
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|   Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
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| 
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|   This software is provided 'as-is', without any express or implied
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|   warranty.  In no event will the authors be held liable for any damages
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|   arising from the use of this software.
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| 
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|   Permission is granted to anyone to use this software for any purpose,
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|   including commercial applications, and to alter it and redistribute it
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|   freely, subject to the following restrictions:
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| 
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|   1. The origin of this software must not be misrepresented; you must not
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|      claim that you wrote the original software. If you use this software
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|      in a product, an acknowledgment in the product documentation would be
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|      appreciated but is not required.
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|   2. Altered source versions must be plainly marked as such, and must not be
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|      misrepresented as being the original software.
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|   3. This notice may not be removed or altered from any source distribution.
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| */
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| 
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| /**
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|  * # CategoryAssert
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|  *
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|  * A helpful assertion macro!
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|  *
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|  * SDL assertions operate like your usual `assert` macro, but with some added
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|  * features:
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|  *
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|  * - It uses a trick with the `sizeof` operator, so disabled assertions
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|  *   vaporize out of the compiled code, but variables only referenced in the
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|  *   assertion won't trigger compiler warnings about being unused.
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|  * - It is safe to use with a dangling-else: `if (x) SDL_assert(y); else
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|  *   do_something();`
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|  * - It works the same everywhere, instead of counting on various platforms'
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|  *   compiler and C runtime to behave.
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|  * - It provides multiple levels of assertion (SDL_assert, SDL_assert_release,
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|  *   SDL_assert_paranoid) instead of a single all-or-nothing option.
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|  * - It offers a variety of responses when an assertion fails (retry, trigger
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|  *   the debugger, abort the program, ignore the failure once, ignore it for
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|  *   the rest of the program's run).
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|  * - It tries to show the user a dialog by default, if possible, but the app
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|  *   can provide a callback to handle assertion failures however they like.
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|  * - It lets failed assertions be retried. Perhaps you had a network failure
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|  *   and just want to retry the test after plugging your network cable back
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|  *   in? You can.
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|  * - It lets the user ignore an assertion failure, if there's a harmless
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|  *   problem that one can continue past.
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|  * - It lets the user mark an assertion as ignored for the rest of the
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|  *   program's run; if there's a harmless problem that keeps popping up.
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|  * - It provides statistics and data on all failed assertions to the app.
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|  * - It allows the default assertion handler to be controlled with environment
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|  *   variables, in case an automated script needs to control it.
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|  * - It can be used as an aid to Clang's static analysis; it will treat SDL
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|  *   assertions as universally true (under the assumption that you are serious
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|  *   about the asserted claims and that your debug builds will detect when
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|  *   these claims were wrong). This can help the analyzer avoid false
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|  *   positives.
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|  *
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|  * To use it: compile a debug build and just sprinkle around tests to check
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|  * your code!
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|  */
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| 
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| #ifndef SDL_assert_h_
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| #define SDL_assert_h_
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| 
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| #include <SDL3/SDL_stdinc.h>
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| 
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| #include <SDL3/SDL_begin_code.h>
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| /* Set up for C function definitions, even when using C++ */
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| #ifdef __cplusplus
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| extern "C" {
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| #endif
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| 
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| #ifdef SDL_WIKI_DOCUMENTATION_SECTION
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| 
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| /**
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|  * The level of assertion aggressiveness.
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|  *
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|  * This value changes depending on compiler options and other preprocessor
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|  * defines.
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|  *
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|  * It is currently one of the following values, but future SDL releases might
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|  * add more:
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|  *
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|  * - 0: All SDL assertion macros are disabled.
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|  * - 1: Release settings: SDL_assert disabled, SDL_assert_release enabled.
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|  * - 2: Debug settings: SDL_assert and SDL_assert_release enabled.
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|  * - 3: Paranoid settings: All SDL assertion macros enabled, including
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|  *   SDL_assert_paranoid.
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
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| #define SDL_ASSERT_LEVEL SomeNumberBasedOnVariousFactors
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| 
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| #elif !defined(SDL_ASSERT_LEVEL)
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| #ifdef SDL_DEFAULT_ASSERT_LEVEL
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| #define SDL_ASSERT_LEVEL SDL_DEFAULT_ASSERT_LEVEL
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| #elif defined(_DEBUG) || defined(DEBUG) || \
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|       (defined(__GNUC__) && !defined(__OPTIMIZE__))
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| #define SDL_ASSERT_LEVEL 2
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| #else
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| #define SDL_ASSERT_LEVEL 1
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| #endif
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| #endif
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| 
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| #ifdef SDL_WIKI_DOCUMENTATION_SECTION
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| 
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| /**
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|  * Attempt to tell an attached debugger to pause.
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|  *
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|  * This allows an app to programmatically halt ("break") the debugger as if it
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|  * had hit a breakpoint, allowing the developer to examine program state, etc.
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|  *
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|  * This is a macro--not a function--so that the debugger breaks on the source
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|  * code line that used SDL_TriggerBreakpoint and not in some random guts of
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|  * SDL. SDL_assert uses this macro for the same reason.
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|  *
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|  * If the program is not running under a debugger, SDL_TriggerBreakpoint will
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|  * likely terminate the app, possibly without warning. If the current platform
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|  * isn't supported, this macro is left undefined.
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|  *
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|  * \threadsafety It is safe to call this macro from any thread.
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
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| #define SDL_TriggerBreakpoint() TriggerABreakpointInAPlatformSpecificManner
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| 
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| #elif defined(_MSC_VER) && _MSC_VER >= 1310
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|     /* Don't include intrin.h here because it contains C++ code */
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|     extern void __cdecl __debugbreak(void);
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|     #define SDL_TriggerBreakpoint() __debugbreak()
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| #elif defined(_MSC_VER) && defined(_M_IX86)
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|     #define SDL_TriggerBreakpoint() { _asm { int 0x03 }  }
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| #elif defined(ANDROID)
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|     #include <assert.h>
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|     #define SDL_TriggerBreakpoint() assert(0)
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| #elif SDL_HAS_BUILTIN(__builtin_debugtrap)
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|     #define SDL_TriggerBreakpoint() __builtin_debugtrap()
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| #elif SDL_HAS_BUILTIN(__builtin_trap)
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|     #define SDL_TriggerBreakpoint() __builtin_trap()
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| #elif (defined(__GNUC__) || defined(__clang__)) && (defined(__i386__) || defined(__x86_64__))
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|     #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "int $3\n\t" )
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| #elif (defined(__GNUC__) || defined(__clang__)) && defined(__riscv)
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|     #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "ebreak\n\t" )
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| #elif ( defined(SDL_PLATFORM_APPLE) && (defined(__arm64__) || defined(__aarch64__)) )  /* this might work on other ARM targets, but this is a known quantity... */
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|     #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "brk #22\n\t" )
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| #elif defined(SDL_PLATFORM_APPLE) && defined(__arm__)
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|     #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "bkpt #22\n\t" )
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| #elif defined(_WIN32) && ((defined(__GNUC__) || defined(__clang__)) && (defined(__arm64__) || defined(__aarch64__)) )
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|     #define SDL_TriggerBreakpoint() __asm__ __volatile__ ( "brk #0xF000\n\t" )
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| #elif defined(__GNUC__) || defined(__clang__)
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|     #define SDL_TriggerBreakpoint() __builtin_trap()  /* older gcc may not support SDL_HAS_BUILTIN(__builtin_trap) above */
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| #elif defined(__386__) && defined(__WATCOMC__)
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|     #define SDL_TriggerBreakpoint() { _asm { int 0x03 } }
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| #elif defined(HAVE_SIGNAL_H) && !defined(__WATCOMC__)
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|     #include <signal.h>
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|     #define SDL_TriggerBreakpoint() raise(SIGTRAP)
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| #else
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|     /* SDL_TriggerBreakpoint is intentionally left undefined on unknown platforms. */
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| #endif
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| 
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| #ifdef SDL_WIKI_DOCUMENTATION_SECTION
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| 
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| /**
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|  * A macro that reports the current function being compiled.
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|  *
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|  * If SDL can't figure how the compiler reports this, it will use "???".
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
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| #define SDL_FUNCTION __FUNCTION__
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| 
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| #elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 supports __func__ as a standard. */
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| #   define SDL_FUNCTION __func__
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| #elif ((defined(__GNUC__) && (__GNUC__ >= 2)) || defined(_MSC_VER) || defined (__WATCOMC__))
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| #   define SDL_FUNCTION __FUNCTION__
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| #else
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| #   define SDL_FUNCTION "???"
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| #endif
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| 
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| /**
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|  * A macro that reports the current file being compiled.
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
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| #define SDL_FILE    __FILE__
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| 
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| /**
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|  * A macro that reports the current line number of the file being compiled.
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
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| #define SDL_LINE    __LINE__
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| 
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| /*
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| sizeof (x) makes the compiler still parse the expression even without
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| assertions enabled, so the code is always checked at compile time, but
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| doesn't actually generate code for it, so there are no side effects or
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| expensive checks at run time, just the constant size of what x WOULD be,
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| which presumably gets optimized out as unused.
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| This also solves the problem of...
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| 
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|     int somevalue = blah();
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|     SDL_assert(somevalue == 1);
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| 
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| ...which would cause compiles to complain that somevalue is unused if we
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| disable assertions.
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| */
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| 
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| #ifdef SDL_WIKI_DOCUMENTATION_SECTION
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| 
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| /**
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|  * A macro for wrapping code in `do {} while (0);` without compiler warnings.
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|  *
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|  * Visual Studio with really aggressive warnings enabled needs this to avoid
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|  * compiler complaints.
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|  *
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|  * the `do {} while (0);` trick is useful for wrapping code in a macro that
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|  * may or may not be a single statement, to avoid various C language
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|  * accidents.
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|  *
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|  * To use:
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|  *
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|  * ```c
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|  * do { SomethingOnce(); } while (SDL_NULL_WHILE_LOOP_CONDITION (0));
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|  * ```
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
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| #define SDL_NULL_WHILE_LOOP_CONDITION (0)
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| 
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| #elif defined(_MSC_VER)  /* Avoid /W4 warnings. */
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| /* "while (0,0)" fools Microsoft's compiler's /W4 warning level into thinking
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|     this condition isn't constant. And looks like an owl's face! */
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| #define SDL_NULL_WHILE_LOOP_CONDITION (0,0)
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| #else
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| #define SDL_NULL_WHILE_LOOP_CONDITION (0)
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| #endif
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| 
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| /**
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|  * The macro used when an assertion is disabled.
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|  *
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|  * This isn't for direct use by apps, but this is the code that is inserted
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|  * when an SDL_assert is disabled (perhaps in a release build).
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|  *
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|  * The code does nothing, but wraps `condition` in a sizeof operator, which
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|  * generates no code and has no side effects, but avoid compiler warnings
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|  * about unused variables.
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|  *
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|  * \param condition the condition to assert (but not actually run here).
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
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| #define SDL_disabled_assert(condition) \
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|     do { (void) sizeof ((condition)); } while (SDL_NULL_WHILE_LOOP_CONDITION)
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| 
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| /**
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|  * Possible outcomes from a triggered assertion.
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|  *
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|  * When an enabled assertion triggers, it may call the assertion handler
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|  * (possibly one provided by the app via SDL_SetAssertionHandler), which will
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|  * return one of these values, possibly after asking the user.
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|  *
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|  * Then SDL will respond based on this outcome (loop around to retry the
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|  * condition, try to break in a debugger, kill the program, or ignore the
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|  * problem).
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|  *
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|  * \since This enum is available since SDL 3.2.0.
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|  */
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| typedef enum SDL_AssertState
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| {
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|     SDL_ASSERTION_RETRY,  /**< Retry the assert immediately. */
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|     SDL_ASSERTION_BREAK,  /**< Make the debugger trigger a breakpoint. */
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|     SDL_ASSERTION_ABORT,  /**< Terminate the program. */
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|     SDL_ASSERTION_IGNORE,  /**< Ignore the assert. */
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|     SDL_ASSERTION_ALWAYS_IGNORE  /**< Ignore the assert from now on. */
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| } SDL_AssertState;
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| 
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| /**
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|  * Information about an assertion failure.
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|  *
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|  * This structure is filled in with information about a triggered assertion,
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|  * used by the assertion handler, then added to the assertion report. This is
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|  * returned as a linked list from SDL_GetAssertionReport().
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|  *
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|  * \since This struct is available since SDL 3.2.0.
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|  */
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| typedef struct SDL_AssertData
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| {
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|     bool always_ignore;  /**< true if app should always continue when assertion is triggered. */
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|     unsigned int trigger_count; /**< Number of times this assertion has been triggered. */
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|     const char *condition;  /**< A string of this assert's test code. */
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|     const char *filename;  /**< The source file where this assert lives. */
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|     int linenum;  /**< The line in `filename` where this assert lives. */
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|     const char *function;  /**< The name of the function where this assert lives. */
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|     const struct SDL_AssertData *next;  /**< next item in the linked list. */
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| } SDL_AssertData;
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| 
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| /**
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|  * Never call this directly.
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|  *
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|  * Use the SDL_assert macros instead.
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|  *
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|  * \param data assert data structure.
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|  * \param func function name.
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|  * \param file file name.
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|  * \param line line number.
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|  * \returns assert state.
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|  *
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|  * \threadsafety It is safe to call this function from any thread.
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|  *
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|  * \since This function is available since SDL 3.2.0.
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|  */
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| extern SDL_DECLSPEC SDL_AssertState SDLCALL SDL_ReportAssertion(SDL_AssertData *data,
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|                                                             const char *func,
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|                                                             const char *file, int line) SDL_ANALYZER_NORETURN;
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| 
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| 
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| #ifdef SDL_WIKI_DOCUMENTATION_SECTION
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| 
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| /**
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|  * The macro used when an assertion triggers a breakpoint.
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|  *
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|  * This isn't for direct use by apps; use SDL_assert or SDL_TriggerBreakpoint
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|  * instead.
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
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| #define SDL_AssertBreakpoint() SDL_TriggerBreakpoint()
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| 
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| #elif !defined(SDL_AssertBreakpoint)
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| #  if defined(ANDROID) && defined(assert)
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|      /* Define this as empty in case assert() is defined as SDL_assert */
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| #    define SDL_AssertBreakpoint()
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| #  else
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| #    define SDL_AssertBreakpoint() SDL_TriggerBreakpoint()
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| #  endif
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| #endif /* !SDL_AssertBreakpoint */
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| 
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| /**
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|  * The macro used when an assertion is enabled.
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|  *
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|  * This isn't for direct use by apps, but this is the code that is inserted
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|  * when an SDL_assert is enabled.
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|  *
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|  * The `do {} while(0)` avoids dangling else problems:
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|  *
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|  * ```c
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|  * if (x) SDL_assert(y); else blah();
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|  * ```
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|  *
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|  * ... without the do/while, the "else" could attach to this macro's "if". We
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|  * try to handle just the minimum we need here in a macro...the loop, the
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|  * static vars, and break points. The heavy lifting is handled in
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|  * SDL_ReportAssertion().
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|  *
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|  * \param condition the condition to assert.
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
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| #define SDL_enabled_assert(condition) \
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|     do { \
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|         while ( !(condition) ) { \
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|             static struct SDL_AssertData sdl_assert_data = { 0, 0, #condition, 0, 0, 0, 0 }; \
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|             const SDL_AssertState sdl_assert_state = SDL_ReportAssertion(&sdl_assert_data, SDL_FUNCTION, SDL_FILE, SDL_LINE); \
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|             if (sdl_assert_state == SDL_ASSERTION_RETRY) { \
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|                 continue; /* go again. */ \
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|             } else if (sdl_assert_state == SDL_ASSERTION_BREAK) { \
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|                 SDL_AssertBreakpoint(); \
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|             } \
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|             break; /* not retrying. */ \
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|         } \
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|     } while (SDL_NULL_WHILE_LOOP_CONDITION)
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| 
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| #ifdef SDL_WIKI_DOCUMENTATION_SECTION
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| 
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| /**
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|  * An assertion test that is normally performed only in debug builds.
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|  *
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|  * This macro is enabled when the SDL_ASSERT_LEVEL is >= 2, otherwise it is
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|  * disabled. This is meant to only do these tests in debug builds, so they can
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|  * tend to be more expensive, and they are meant to bring everything to a halt
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|  * when they fail, with the programmer there to assess the problem.
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|  *
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|  * In short: you can sprinkle these around liberally and assume they will
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|  * evaporate out of the build when building for end-users.
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|  *
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|  * When assertions are disabled, this wraps `condition` in a `sizeof`
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|  * operator, which means any function calls and side effects will not run, but
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|  * the compiler will not complain about any otherwise-unused variables that
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|  * are only referenced in the assertion.
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|  *
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|  * One can set the environment variable "SDL_ASSERT" to one of several strings
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|  * ("abort", "break", "retry", "ignore", "always_ignore") to force a default
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|  * behavior, which may be desirable for automation purposes. If your platform
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|  * requires GUI interfaces to happen on the main thread but you're debugging
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|  * an assertion in a background thread, it might be desirable to set this to
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|  * "break" so that your debugger takes control as soon as assert is triggered,
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|  * instead of risking a bad UI interaction (deadlock, etc) in the application.
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|  *
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|  * \param condition boolean value to test.
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|  *
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|  * \threadsafety It is safe to call this macro from any thread.
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
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| #define SDL_assert(condition) if (assertion_enabled && (condition)) { trigger_assertion; }
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| 
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| /**
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|  * An assertion test that is performed even in release builds.
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|  *
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|  * This macro is enabled when the SDL_ASSERT_LEVEL is >= 1, otherwise it is
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|  * disabled. This is meant to be for tests that are cheap to make and
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|  * extremely unlikely to fail; generally it is frowned upon to have an
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|  * assertion failure in a release build, so these assertions generally need to
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|  * be of more than life-and-death importance if there's a chance they might
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|  * trigger. You should almost always consider handling these cases more
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|  * gracefully than an assert allows.
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|  *
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|  * When assertions are disabled, this wraps `condition` in a `sizeof`
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|  * operator, which means any function calls and side effects will not run, but
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|  * the compiler will not complain about any otherwise-unused variables that
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|  * are only referenced in the assertion.
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|  *
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|  * One can set the environment variable "SDL_ASSERT" to one of several strings
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|  * ("abort", "break", "retry", "ignore", "always_ignore") to force a default
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|  * behavior, which may be desirable for automation purposes. If your platform
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|  * requires GUI interfaces to happen on the main thread but you're debugging
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|  * an assertion in a background thread, it might be desirable to set this to
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|  * "break" so that your debugger takes control as soon as assert is triggered,
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|  * instead of risking a bad UI interaction (deadlock, etc) in the application.
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|  * *
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|  *
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|  * \param condition boolean value to test.
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|  *
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|  * \threadsafety It is safe to call this macro from any thread.
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|  *
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|  * \since This macro is available since SDL 3.2.0.
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|  */
 | |
| #define SDL_assert_release(condition) SDL_disabled_assert(condition)
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| 
 | |
| /**
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|  * An assertion test that is performed only when built with paranoid settings.
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|  *
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|  * This macro is enabled when the SDL_ASSERT_LEVEL is >= 3, otherwise it is
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|  * disabled. This is a higher level than both release and debug, so these
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|  * tests are meant to be expensive and only run when specifically looking for
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|  * extremely unexpected failure cases in a special build.
 | |
|  *
 | |
|  * When assertions are disabled, this wraps `condition` in a `sizeof`
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|  * operator, which means any function calls and side effects will not run, but
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|  * the compiler will not complain about any otherwise-unused variables that
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|  * are only referenced in the assertion.
 | |
|  *
 | |
|  * One can set the environment variable "SDL_ASSERT" to one of several strings
 | |
|  * ("abort", "break", "retry", "ignore", "always_ignore") to force a default
 | |
|  * behavior, which may be desirable for automation purposes. If your platform
 | |
|  * requires GUI interfaces to happen on the main thread but you're debugging
 | |
|  * an assertion in a background thread, it might be desirable to set this to
 | |
|  * "break" so that your debugger takes control as soon as assert is triggered,
 | |
|  * instead of risking a bad UI interaction (deadlock, etc) in the application.
 | |
|  *
 | |
|  * \param condition boolean value to test.
 | |
|  *
 | |
|  * \threadsafety It is safe to call this macro from any thread.
 | |
|  *
 | |
|  * \since This macro is available since SDL 3.2.0.
 | |
|  */
 | |
| #define SDL_assert_paranoid(condition) SDL_disabled_assert(condition)
 | |
| 
 | |
| /* Enable various levels of assertions. */
 | |
| #elif SDL_ASSERT_LEVEL == 0   /* assertions disabled */
 | |
| #   define SDL_assert(condition) SDL_disabled_assert(condition)
 | |
| #   define SDL_assert_release(condition) SDL_disabled_assert(condition)
 | |
| #   define SDL_assert_paranoid(condition) SDL_disabled_assert(condition)
 | |
| #elif SDL_ASSERT_LEVEL == 1  /* release settings. */
 | |
| #   define SDL_assert(condition) SDL_disabled_assert(condition)
 | |
| #   define SDL_assert_release(condition) SDL_enabled_assert(condition)
 | |
| #   define SDL_assert_paranoid(condition) SDL_disabled_assert(condition)
 | |
| #elif SDL_ASSERT_LEVEL == 2  /* debug settings. */
 | |
| #   define SDL_assert(condition) SDL_enabled_assert(condition)
 | |
| #   define SDL_assert_release(condition) SDL_enabled_assert(condition)
 | |
| #   define SDL_assert_paranoid(condition) SDL_disabled_assert(condition)
 | |
| #elif SDL_ASSERT_LEVEL == 3  /* paranoid settings. */
 | |
| #   define SDL_assert(condition) SDL_enabled_assert(condition)
 | |
| #   define SDL_assert_release(condition) SDL_enabled_assert(condition)
 | |
| #   define SDL_assert_paranoid(condition) SDL_enabled_assert(condition)
 | |
| #else
 | |
| #   error Unknown assertion level.
 | |
| #endif
 | |
| 
 | |
| /**
 | |
|  * An assertion test that is always performed.
 | |
|  *
 | |
|  * This macro is always enabled no matter what SDL_ASSERT_LEVEL is set to. You
 | |
|  * almost never want to use this, as it could trigger on an end-user's system,
 | |
|  * crashing your program.
 | |
|  *
 | |
|  * One can set the environment variable "SDL_ASSERT" to one of several strings
 | |
|  * ("abort", "break", "retry", "ignore", "always_ignore") to force a default
 | |
|  * behavior, which may be desirable for automation purposes. If your platform
 | |
|  * requires GUI interfaces to happen on the main thread but you're debugging
 | |
|  * an assertion in a background thread, it might be desirable to set this to
 | |
|  * "break" so that your debugger takes control as soon as assert is triggered,
 | |
|  * instead of risking a bad UI interaction (deadlock, etc) in the application.
 | |
|  *
 | |
|  * \param condition boolean value to test.
 | |
|  *
 | |
|  * \threadsafety It is safe to call this macro from any thread.
 | |
|  *
 | |
|  * \since This macro is available since SDL 3.2.0.
 | |
|  */
 | |
| #define SDL_assert_always(condition) SDL_enabled_assert(condition)
 | |
| 
 | |
| 
 | |
| /**
 | |
|  * A callback that fires when an SDL assertion fails.
 | |
|  *
 | |
|  * \param data a pointer to the SDL_AssertData structure corresponding to the
 | |
|  *             current assertion.
 | |
|  * \param userdata what was passed as `userdata` to SDL_SetAssertionHandler().
 | |
|  * \returns an SDL_AssertState value indicating how to handle the failure.
 | |
|  *
 | |
|  * \threadsafety This callback may be called from any thread that triggers an
 | |
|  *               assert at any time.
 | |
|  *
 | |
|  * \since This datatype is available since SDL 3.2.0.
 | |
|  */
 | |
| typedef SDL_AssertState (SDLCALL *SDL_AssertionHandler)(
 | |
|                                  const SDL_AssertData *data, void *userdata);
 | |
| 
 | |
| /**
 | |
|  * Set an application-defined assertion handler.
 | |
|  *
 | |
|  * This function allows an application to show its own assertion UI and/or
 | |
|  * force the response to an assertion failure. If the application doesn't
 | |
|  * provide this, SDL will try to do the right thing, popping up a
 | |
|  * system-specific GUI dialog, and probably minimizing any fullscreen windows.
 | |
|  *
 | |
|  * This callback may fire from any thread, but it runs wrapped in a mutex, so
 | |
|  * it will only fire from one thread at a time.
 | |
|  *
 | |
|  * This callback is NOT reset to SDL's internal handler upon SDL_Quit()!
 | |
|  *
 | |
|  * \param handler the SDL_AssertionHandler function to call when an assertion
 | |
|  *                fails or NULL for the default handler.
 | |
|  * \param userdata a pointer that is passed to `handler`.
 | |
|  *
 | |
|  * \threadsafety It is safe to call this function from any thread.
 | |
|  *
 | |
|  * \since This function is available since SDL 3.2.0.
 | |
|  *
 | |
|  * \sa SDL_GetAssertionHandler
 | |
|  */
 | |
| extern SDL_DECLSPEC void SDLCALL SDL_SetAssertionHandler(
 | |
|                                             SDL_AssertionHandler handler,
 | |
|                                             void *userdata);
 | |
| 
 | |
| /**
 | |
|  * Get the default assertion handler.
 | |
|  *
 | |
|  * This returns the function pointer that is called by default when an
 | |
|  * assertion is triggered. This is an internal function provided by SDL, that
 | |
|  * is used for assertions when SDL_SetAssertionHandler() hasn't been used to
 | |
|  * provide a different function.
 | |
|  *
 | |
|  * \returns the default SDL_AssertionHandler that is called when an assert
 | |
|  *          triggers.
 | |
|  *
 | |
|  * \threadsafety It is safe to call this function from any thread.
 | |
|  *
 | |
|  * \since This function is available since SDL 3.2.0.
 | |
|  *
 | |
|  * \sa SDL_GetAssertionHandler
 | |
|  */
 | |
| extern SDL_DECLSPEC SDL_AssertionHandler SDLCALL SDL_GetDefaultAssertionHandler(void);
 | |
| 
 | |
| /**
 | |
|  * Get the current assertion handler.
 | |
|  *
 | |
|  * This returns the function pointer that is called when an assertion is
 | |
|  * triggered. This is either the value last passed to
 | |
|  * SDL_SetAssertionHandler(), or if no application-specified function is set,
 | |
|  * is equivalent to calling SDL_GetDefaultAssertionHandler().
 | |
|  *
 | |
|  * The parameter `puserdata` is a pointer to a void*, which will store the
 | |
|  * "userdata" pointer that was passed to SDL_SetAssertionHandler(). This value
 | |
|  * will always be NULL for the default handler. If you don't care about this
 | |
|  * data, it is safe to pass a NULL pointer to this function to ignore it.
 | |
|  *
 | |
|  * \param puserdata pointer which is filled with the "userdata" pointer that
 | |
|  *                  was passed to SDL_SetAssertionHandler().
 | |
|  * \returns the SDL_AssertionHandler that is called when an assert triggers.
 | |
|  *
 | |
|  * \threadsafety It is safe to call this function from any thread.
 | |
|  *
 | |
|  * \since This function is available since SDL 3.2.0.
 | |
|  *
 | |
|  * \sa SDL_SetAssertionHandler
 | |
|  */
 | |
| extern SDL_DECLSPEC SDL_AssertionHandler SDLCALL SDL_GetAssertionHandler(void **puserdata);
 | |
| 
 | |
| /**
 | |
|  * Get a list of all assertion failures.
 | |
|  *
 | |
|  * This function gets all assertions triggered since the last call to
 | |
|  * SDL_ResetAssertionReport(), or the start of the program.
 | |
|  *
 | |
|  * The proper way to examine this data looks something like this:
 | |
|  *
 | |
|  * ```c
 | |
|  * const SDL_AssertData *item = SDL_GetAssertionReport();
 | |
|  * while (item) {
 | |
|  *    printf("'%s', %s (%s:%d), triggered %u times, always ignore: %s.\\n",
 | |
|  *           item->condition, item->function, item->filename,
 | |
|  *           item->linenum, item->trigger_count,
 | |
|  *           item->always_ignore ? "yes" : "no");
 | |
|  *    item = item->next;
 | |
|  * }
 | |
|  * ```
 | |
|  *
 | |
|  * \returns a list of all failed assertions or NULL if the list is empty. This
 | |
|  *          memory should not be modified or freed by the application. This
 | |
|  *          pointer remains valid until the next call to SDL_Quit() or
 | |
|  *          SDL_ResetAssertionReport().
 | |
|  *
 | |
|  * \threadsafety This function is not thread safe. Other threads calling
 | |
|  *               SDL_ResetAssertionReport() simultaneously, may render the
 | |
|  *               returned pointer invalid.
 | |
|  *
 | |
|  * \since This function is available since SDL 3.2.0.
 | |
|  *
 | |
|  * \sa SDL_ResetAssertionReport
 | |
|  */
 | |
| extern SDL_DECLSPEC const SDL_AssertData * SDLCALL SDL_GetAssertionReport(void);
 | |
| 
 | |
| /**
 | |
|  * Clear the list of all assertion failures.
 | |
|  *
 | |
|  * This function will clear the list of all assertions triggered up to that
 | |
|  * point. Immediately following this call, SDL_GetAssertionReport will return
 | |
|  * no items. In addition, any previously-triggered assertions will be reset to
 | |
|  * a trigger_count of zero, and their always_ignore state will be false.
 | |
|  *
 | |
|  * \threadsafety This function is not thread safe. Other threads triggering an
 | |
|  *               assertion, or simultaneously calling this function may cause
 | |
|  *               memory leaks or crashes.
 | |
|  *
 | |
|  * \since This function is available since SDL 3.2.0.
 | |
|  *
 | |
|  * \sa SDL_GetAssertionReport
 | |
|  */
 | |
| extern SDL_DECLSPEC void SDLCALL SDL_ResetAssertionReport(void);
 | |
| 
 | |
| /* Ends C function definitions when using C++ */
 | |
| #ifdef __cplusplus
 | |
| }
 | |
| #endif
 | |
| #include <SDL3/SDL_close_code.h>
 | |
| 
 | |
| #endif /* SDL_assert_h_ */
 | 
