added absolutely broken cpp code after painfull debugging session

vendored/SDL/include/SDL3/SDL_error.h

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+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/**
+ * # CategoryError
+ *
+ * Simple error message routines for SDL.
+ *
+ * Most apps will interface with these APIs in exactly one function: when
+ * almost any SDL function call reports failure, you can get a human-readable
+ * string of the problem from SDL_GetError().
+ *
+ * These strings are maintained per-thread, and apps are welcome to set their
+ * own errors, which is popular when building libraries on top of SDL for
+ * other apps to consume. These strings are set by calling SDL_SetError().
+ *
+ * A common usage pattern is to have a function that returns true for success
+ * and false for failure, and do this when something fails:
+ *
+ * ```c
+ * if (something_went_wrong) {
+ *    return SDL_SetError("The thing broke in this specific way: %d", errcode);
+ * }
+ * ```
+ *
+ * It's also common to just return `false` in this case if the failing thing
+ * is known to call SDL_SetError(), so errors simply propagate through.
+ */
+
+#ifndef SDL_error_h_
+#define SDL_error_h_
+
+#include <SDL3/SDL_stdinc.h>
+
+#include <SDL3/SDL_begin_code.h>
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Public functions */
+
+
+/**
+ * Set the SDL error message for the current thread.
+ *
+ * Calling this function will replace any previous error message that was set.
+ *
+ * This function always returns false, since SDL frequently uses false to
+ * signify a failing result, leading to this idiom:
+ *
+ * ```c
+ * if (error_code) {
+ *     return SDL_SetError("This operation has failed: %d", error_code);
+ * }
+ * ```
+ *
+ * \param fmt a printf()-style message format string.
+ * \param ... additional parameters matching % tokens in the `fmt` string, if
+ *            any.
+ * \returns false.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_ClearError
+ * \sa SDL_GetError
+ * \sa SDL_SetErrorV
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SetError(SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(1);
+
+/**
+ * Set the SDL error message for the current thread.
+ *
+ * Calling this function will replace any previous error message that was set.
+ *
+ * \param fmt a printf()-style message format string.
+ * \param ap a variable argument list.
+ * \returns false.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_ClearError
+ * \sa SDL_GetError
+ * \sa SDL_SetError
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SetErrorV(SDL_PRINTF_FORMAT_STRING const char *fmt, va_list ap) SDL_PRINTF_VARARG_FUNCV(1);
+
+/**
+ * Set an error indicating that memory allocation failed.
+ *
+ * This function does not do any memory allocation.
+ *
+ * \returns false.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_OutOfMemory(void);
+
+/**
+ * Retrieve a message about the last error that occurred on the current
+ * thread.
+ *
+ * It is possible for multiple errors to occur before calling SDL_GetError().
+ * Only the last error is returned.
+ *
+ * The message is only applicable when an SDL function has signaled an error.
+ * You must check the return values of SDL function calls to determine when to
+ * appropriately call SDL_GetError(). You should *not* use the results of
+ * SDL_GetError() to decide if an error has occurred! Sometimes SDL will set
+ * an error string even when reporting success.
+ *
+ * SDL will *not* clear the error string for successful API calls. You *must*
+ * check return values for failure cases before you can assume the error
+ * string applies.
+ *
+ * Error strings are set per-thread, so an error set in a different thread
+ * will not interfere with the current thread's operation.
+ *
+ * The returned value is a thread-local string which will remain valid until
+ * the current thread's error string is changed. The caller should make a copy
+ * if the value is needed after the next SDL API call.
+ *
+ * \returns a message with information about the specific error that occurred,
+ *          or an empty string if there hasn't been an error message set since
+ *          the last call to SDL_ClearError().
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_ClearError
+ * \sa SDL_SetError
+ */
+extern SDL_DECLSPEC const char * SDLCALL SDL_GetError(void);
+
+/**
+ * Clear any previous error message for this thread.
+ *
+ * \returns true.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_GetError
+ * \sa SDL_SetError
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ClearError(void);
+
+/**
+ *  \name Internal error functions
+ *
+ *  \internal
+ *  Private error reporting function - used internally.
+ */
+/* @{ */
+
+/**
+ * A macro to standardize error reporting on unsupported operations.
+ *
+ * This simply calls SDL_SetError() with a standardized error string, for
+ * convenience, consistency, and clarity.
+ *
+ * \threadsafety It is safe to call this macro from any thread.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_Unsupported()               SDL_SetError("That operation is not supported")
+
+/**
+ * A macro to standardize error reporting on unsupported operations.
+ *
+ * This simply calls SDL_SetError() with a standardized error string, for
+ * convenience, consistency, and clarity.
+ *
+ * A common usage pattern inside SDL is this:
+ *
+ * ```c
+ * bool MyFunction(const char *str) {
+ *     if (!str) {
+ *         return SDL_InvalidParamError("str");  // returns false.
+ *     }
+ *     DoSomething(str);
+ *     return true;
+ * }
+ * ```
+ *
+ * \threadsafety It is safe to call this macro from any thread.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_InvalidParamError(param)    SDL_SetError("Parameter '%s' is invalid", (param))
+
+/* @} *//* Internal error functions */
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include <SDL3/SDL_close_code.h>
+
+#endif /* SDL_error_h_ */