Update to SDL3

1 files changed, 1354 insertions, 0 deletions

diff --git a/src/contrib/SDL-3.2.20/include/SDL3/SDL_iostream.h b/src/contrib/SDL-3.2.20/include/SDL3/SDL_iostream.h
new file mode 100644
index 0000000..4ca1609
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/include/SDL3/SDL_iostream.h
@@ -0,0 +1,1354 @@
+/*
+  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.
+*/
+
+/* WIKI CATEGORY: IOStream */
+
+/**
+ * # CategoryIOStream
+ *
+ * SDL provides an abstract interface for reading and writing data streams. It
+ * offers implementations for files, memory, etc, and the app can provide
+ * their own implementations, too.
+ *
+ * SDL_IOStream is not related to the standard C++ iostream class, other than
+ * both are abstract interfaces to read/write data.
+ */
+
+#ifndef SDL_iostream_h_
+#define SDL_iostream_h_
+
+#include <SDL3/SDL_stdinc.h>
+#include <SDL3/SDL_error.h>
+#include <SDL3/SDL_properties.h>
+
+#include <SDL3/SDL_begin_code.h>
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * SDL_IOStream status, set by a read or write operation.
+ *
+ * \since This enum is available since SDL 3.2.0.
+ */
+typedef enum SDL_IOStatus
+{
+    SDL_IO_STATUS_READY,     /**< Everything is ready (no errors and not EOF). */
+    SDL_IO_STATUS_ERROR,     /**< Read or write I/O error */
+    SDL_IO_STATUS_EOF,       /**< End of file */
+    SDL_IO_STATUS_NOT_READY, /**< Non blocking I/O, not ready */
+    SDL_IO_STATUS_READONLY,  /**< Tried to write a read-only buffer */
+    SDL_IO_STATUS_WRITEONLY  /**< Tried to read a write-only buffer */
+} SDL_IOStatus;
+
+/**
+ * Possible `whence` values for SDL_IOStream seeking.
+ *
+ * These map to the same "whence" concept that `fseek` or `lseek` use in the
+ * standard C runtime.
+ *
+ * \since This enum is available since SDL 3.2.0.
+ */
+typedef enum SDL_IOWhence
+{
+    SDL_IO_SEEK_SET,  /**< Seek from the beginning of data */
+    SDL_IO_SEEK_CUR,  /**< Seek relative to current read point */
+    SDL_IO_SEEK_END   /**< Seek relative to the end of data */
+} SDL_IOWhence;
+
+/**
+ * The function pointers that drive an SDL_IOStream.
+ *
+ * Applications can provide this struct to SDL_OpenIO() to create their own
+ * implementation of SDL_IOStream. This is not necessarily required, as SDL
+ * already offers several common types of I/O streams, via functions like
+ * SDL_IOFromFile() and SDL_IOFromMem().
+ *
+ * This structure should be initialized using SDL_INIT_INTERFACE()
+ *
+ * \since This struct is available since SDL 3.2.0.
+ *
+ * \sa SDL_INIT_INTERFACE
+ */
+typedef struct SDL_IOStreamInterface
+{
+    /* The version of this interface */
+    Uint32 version;
+
+    /**
+     *  Return the number of bytes in this SDL_IOStream
+     *
+     *  \return the total size of the data stream, or -1 on error.
+     */
+    Sint64 (SDLCALL *size)(void *userdata);
+
+    /**
+     *  Seek to `offset` relative to `whence`, one of stdio's whence values:
+     *  SDL_IO_SEEK_SET, SDL_IO_SEEK_CUR, SDL_IO_SEEK_END
+     *
+     *  \return the final offset in the data stream, or -1 on error.
+     */
+    Sint64 (SDLCALL *seek)(void *userdata, Sint64 offset, SDL_IOWhence whence);
+
+    /**
+     *  Read up to `size` bytes from the data stream to the area pointed
+     *  at by `ptr`.
+     *
+     *  On an incomplete read, you should set `*status` to a value from the
+     *  SDL_IOStatus enum. You do not have to explicitly set this on
+     *  a complete, successful read.
+     *
+     *  \return the number of bytes read
+     */
+    size_t (SDLCALL *read)(void *userdata, void *ptr, size_t size, SDL_IOStatus *status);
+
+    /**
+     *  Write exactly `size` bytes from the area pointed at by `ptr`
+     *  to data stream.
+     *
+     *  On an incomplete write, you should set `*status` to a value from the
+     *  SDL_IOStatus enum. You do not have to explicitly set this on
+     *  a complete, successful write.
+     *
+     *  \return the number of bytes written
+     */
+    size_t (SDLCALL *write)(void *userdata, const void *ptr, size_t size, SDL_IOStatus *status);
+
+    /**
+     *  If the stream is buffering, make sure the data is written out.
+     *
+     *  On failure, you should set `*status` to a value from the
+     *  SDL_IOStatus enum. You do not have to explicitly set this on
+     *  a successful flush.
+     *
+     *  \return true if successful or false on write error when flushing data.
+     */
+    bool (SDLCALL *flush)(void *userdata, SDL_IOStatus *status);
+
+    /**
+     *  Close and free any allocated resources.
+     *
+     *  This does not guarantee file writes will sync to physical media; they
+     *  can be in the system's file cache, waiting to go to disk.
+     *
+     *  The SDL_IOStream is still destroyed even if this fails, so clean up anything
+     *  even if flushing buffers, etc, returns an error.
+     *
+     *  \return true if successful or false on write error when flushing data.
+     */
+    bool (SDLCALL *close)(void *userdata);
+
+} SDL_IOStreamInterface;
+
+/* Check the size of SDL_IOStreamInterface
+ *
+ * If this assert fails, either the compiler is padding to an unexpected size,
+ * or the interface has been updated and this should be updated to match and
+ * the code using this interface should be updated to handle the old version.
+ */
+SDL_COMPILE_TIME_ASSERT(SDL_IOStreamInterface_SIZE,
+    (sizeof(void *) == 4 && sizeof(SDL_IOStreamInterface) == 28) ||
+    (sizeof(void *) == 8 && sizeof(SDL_IOStreamInterface) == 56));
+
+/**
+ * The read/write operation structure.
+ *
+ * This operates as an opaque handle. There are several APIs to create various
+ * types of I/O streams, or an app can supply an SDL_IOStreamInterface to
+ * SDL_OpenIO() to provide their own stream implementation behind this
+ * struct's abstract interface.
+ *
+ * \since This struct is available since SDL 3.2.0.
+ */
+typedef struct SDL_IOStream SDL_IOStream;
+
+
+/**
+ *  \name IOFrom functions
+ *
+ *  Functions to create SDL_IOStream structures from various data streams.
+ */
+/* @{ */
+
+/**
+ * Use this function to create a new SDL_IOStream structure for reading from
+ * and/or writing to a named file.
+ *
+ * The `mode` string is treated roughly the same as in a call to the C
+ * library's fopen(), even if SDL doesn't happen to use fopen() behind the
+ * scenes.
+ *
+ * Available `mode` strings:
+ *
+ * - "r": Open a file for reading. The file must exist.
+ * - "w": Create an empty file for writing. If a file with the same name
+ *   already exists its content is erased and the file is treated as a new
+ *   empty file.
+ * - "a": Append to a file. Writing operations append data at the end of the
+ *   file. The file is created if it does not exist.
+ * - "r+": Open a file for update both reading and writing. The file must
+ *   exist.
+ * - "w+": Create an empty file for both reading and writing. If a file with
+ *   the same name already exists its content is erased and the file is
+ *   treated as a new empty file.
+ * - "a+": Open a file for reading and appending. All writing operations are
+ *   performed at the end of the file, protecting the previous content to be
+ *   overwritten. You can reposition (fseek, rewind) the internal pointer to
+ *   anywhere in the file for reading, but writing operations will move it
+ *   back to the end of file. The file is created if it does not exist.
+ *
+ * **NOTE**: In order to open a file as a binary file, a "b" character has to
+ * be included in the `mode` string. This additional "b" character can either
+ * be appended at the end of the string (thus making the following compound
+ * modes: "rb", "wb", "ab", "r+b", "w+b", "a+b") or be inserted between the
+ * letter and the "+" sign for the mixed modes ("rb+", "wb+", "ab+").
+ * Additional characters may follow the sequence, although they should have no
+ * effect. For example, "t" is sometimes appended to make explicit the file is
+ * a text file.
+ *
+ * This function supports Unicode filenames, but they must be encoded in UTF-8
+ * format, regardless of the underlying operating system.
+ *
+ * In Android, SDL_IOFromFile() can be used to open content:// URIs. As a
+ * fallback, SDL_IOFromFile() will transparently open a matching filename in
+ * the app's `assets`.
+ *
+ * Closing the SDL_IOStream will close SDL's internal file handle.
+ *
+ * The following properties may be set at creation time by SDL:
+ *
+ * - `SDL_PROP_IOSTREAM_WINDOWS_HANDLE_POINTER`: a pointer, that can be cast
+ *   to a win32 `HANDLE`, that this SDL_IOStream is using to access the
+ *   filesystem. If the program isn't running on Windows, or SDL used some
+ *   other method to access the filesystem, this property will not be set.
+ * - `SDL_PROP_IOSTREAM_STDIO_FILE_POINTER`: a pointer, that can be cast to a
+ *   stdio `FILE *`, that this SDL_IOStream is using to access the filesystem.
+ *   If SDL used some other method to access the filesystem, this property
+ *   will not be set. PLEASE NOTE that if SDL is using a different C runtime
+ *   than your app, trying to use this pointer will almost certainly result in
+ *   a crash! This is mostly a problem on Windows; make sure you build SDL and
+ *   your app with the same compiler and settings to avoid it.
+ * - `SDL_PROP_IOSTREAM_FILE_DESCRIPTOR_NUMBER`: a file descriptor that this
+ *   SDL_IOStream is using to access the filesystem.
+ * - `SDL_PROP_IOSTREAM_ANDROID_AASSET_POINTER`: a pointer, that can be cast
+ *   to an Android NDK `AAsset *`, that this SDL_IOStream is using to access
+ *   the filesystem. If SDL used some other method to access the filesystem,
+ *   this property will not be set.
+ *
+ * \param file a UTF-8 string representing the filename to open.
+ * \param mode an ASCII string representing the mode to be used for opening
+ *             the file.
+ * \returns a pointer to the SDL_IOStream structure that is created or NULL on
+ *          failure; call SDL_GetError() for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_CloseIO
+ * \sa SDL_FlushIO
+ * \sa SDL_ReadIO
+ * \sa SDL_SeekIO
+ * \sa SDL_TellIO
+ * \sa SDL_WriteIO
+ */
+extern SDL_DECLSPEC SDL_IOStream * SDLCALL SDL_IOFromFile(const char *file, const char *mode);
+
+#define SDL_PROP_IOSTREAM_WINDOWS_HANDLE_POINTER    "SDL.iostream.windows.handle"
+#define SDL_PROP_IOSTREAM_STDIO_FILE_POINTER        "SDL.iostream.stdio.file"
+#define SDL_PROP_IOSTREAM_FILE_DESCRIPTOR_NUMBER    "SDL.iostream.file_descriptor"
+#define SDL_PROP_IOSTREAM_ANDROID_AASSET_POINTER    "SDL.iostream.android.aasset"
+
+/**
+ * Use this function to prepare a read-write memory buffer for use with
+ * SDL_IOStream.
+ *
+ * This function sets up an SDL_IOStream struct based on a memory area of a
+ * certain size, for both read and write access.
+ *
+ * This memory buffer is not copied by the SDL_IOStream; the pointer you
+ * provide must remain valid until you close the stream. Closing the stream
+ * will not free the original buffer.
+ *
+ * If you need to make sure the SDL_IOStream never writes to the memory
+ * buffer, you should use SDL_IOFromConstMem() with a read-only buffer of
+ * memory instead.
+ *
+ * The following properties will be set at creation time by SDL:
+ *
+ * - `SDL_PROP_IOSTREAM_MEMORY_POINTER`: this will be the `mem` parameter that
+ *   was passed to this function.
+ * - `SDL_PROP_IOSTREAM_MEMORY_SIZE_NUMBER`: this will be the `size` parameter
+ *   that was passed to this function.
+ *
+ * \param mem a pointer to a buffer to feed an SDL_IOStream stream.
+ * \param size the buffer size, in bytes.
+ * \returns a pointer to a new SDL_IOStream structure or NULL on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_IOFromConstMem
+ * \sa SDL_CloseIO
+ * \sa SDL_FlushIO
+ * \sa SDL_ReadIO
+ * \sa SDL_SeekIO
+ * \sa SDL_TellIO
+ * \sa SDL_WriteIO
+ */
+extern SDL_DECLSPEC SDL_IOStream * SDLCALL SDL_IOFromMem(void *mem, size_t size);
+
+#define SDL_PROP_IOSTREAM_MEMORY_POINTER "SDL.iostream.memory.base"
+#define SDL_PROP_IOSTREAM_MEMORY_SIZE_NUMBER  "SDL.iostream.memory.size"
+
+/**
+ * Use this function to prepare a read-only memory buffer for use with
+ * SDL_IOStream.
+ *
+ * This function sets up an SDL_IOStream struct based on a memory area of a
+ * certain size. It assumes the memory area is not writable.
+ *
+ * Attempting to write to this SDL_IOStream stream will report an error
+ * without writing to the memory buffer.
+ *
+ * This memory buffer is not copied by the SDL_IOStream; the pointer you
+ * provide must remain valid until you close the stream. Closing the stream
+ * will not free the original buffer.
+ *
+ * If you need to write to a memory buffer, you should use SDL_IOFromMem()
+ * with a writable buffer of memory instead.
+ *
+ * The following properties will be set at creation time by SDL:
+ *
+ * - `SDL_PROP_IOSTREAM_MEMORY_POINTER`: this will be the `mem` parameter that
+ *   was passed to this function.
+ * - `SDL_PROP_IOSTREAM_MEMORY_SIZE_NUMBER`: this will be the `size` parameter
+ *   that was passed to this function.
+ *
+ * \param mem a pointer to a read-only buffer to feed an SDL_IOStream stream.
+ * \param size the buffer size, in bytes.
+ * \returns a pointer to a new SDL_IOStream structure or NULL on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_IOFromMem
+ * \sa SDL_CloseIO
+ * \sa SDL_ReadIO
+ * \sa SDL_SeekIO
+ * \sa SDL_TellIO
+ */
+extern SDL_DECLSPEC SDL_IOStream * SDLCALL SDL_IOFromConstMem(const void *mem, size_t size);
+
+/**
+ * Use this function to create an SDL_IOStream that is backed by dynamically
+ * allocated memory.
+ *
+ * This supports the following properties to provide access to the memory and
+ * control over allocations:
+ *
+ * - `SDL_PROP_IOSTREAM_DYNAMIC_MEMORY_POINTER`: a pointer to the internal
+ *   memory of the stream. This can be set to NULL to transfer ownership of
+ *   the memory to the application, which should free the memory with
+ *   SDL_free(). If this is done, the next operation on the stream must be
+ *   SDL_CloseIO().
+ * - `SDL_PROP_IOSTREAM_DYNAMIC_CHUNKSIZE_NUMBER`: memory will be allocated in
+ *   multiples of this size, defaulting to 1024.
+ *
+ * \returns a pointer to a new SDL_IOStream structure or NULL on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_CloseIO
+ * \sa SDL_ReadIO
+ * \sa SDL_SeekIO
+ * \sa SDL_TellIO
+ * \sa SDL_WriteIO
+ */
+extern SDL_DECLSPEC SDL_IOStream * SDLCALL SDL_IOFromDynamicMem(void);
+
+#define SDL_PROP_IOSTREAM_DYNAMIC_MEMORY_POINTER    "SDL.iostream.dynamic.memory"
+#define SDL_PROP_IOSTREAM_DYNAMIC_CHUNKSIZE_NUMBER  "SDL.iostream.dynamic.chunksize"
+
+/* @} *//* IOFrom functions */
+
+
+/**
+ * Create a custom SDL_IOStream.
+ *
+ * Applications do not need to use this function unless they are providing
+ * their own SDL_IOStream implementation. If you just need an SDL_IOStream to
+ * read/write a common data source, you should use the built-in
+ * implementations in SDL, like SDL_IOFromFile() or SDL_IOFromMem(), etc.
+ *
+ * This function makes a copy of `iface` and the caller does not need to keep
+ * it around after this call.
+ *
+ * \param iface the interface that implements this SDL_IOStream, initialized
+ *              using SDL_INIT_INTERFACE().
+ * \param userdata the pointer that will be passed to the interface functions.
+ * \returns a pointer to the allocated memory on success or NULL on failure;
+ *          call SDL_GetError() for more information.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_CloseIO
+ * \sa SDL_INIT_INTERFACE
+ * \sa SDL_IOFromConstMem
+ * \sa SDL_IOFromFile
+ * \sa SDL_IOFromMem
+ */
+extern SDL_DECLSPEC SDL_IOStream * SDLCALL SDL_OpenIO(const SDL_IOStreamInterface *iface, void *userdata);
+
+/**
+ * Close and free an allocated SDL_IOStream structure.
+ *
+ * SDL_CloseIO() closes and cleans up the SDL_IOStream stream. It releases any
+ * resources used by the stream and frees the SDL_IOStream itself. This
+ * returns true on success, or false if the stream failed to flush to its
+ * output (e.g. to disk).
+ *
+ * Note that if this fails to flush the stream for any reason, this function
+ * reports an error, but the SDL_IOStream is still invalid once this function
+ * returns.
+ *
+ * This call flushes any buffered writes to the operating system, but there
+ * are no guarantees that those writes have gone to physical media; they might
+ * be in the OS's file cache, waiting to go to disk later. If it's absolutely
+ * crucial that writes go to disk immediately, so they are definitely stored
+ * even if the power fails before the file cache would have caught up, one
+ * should call SDL_FlushIO() before closing. Note that flushing takes time and
+ * makes the system and your app operate less efficiently, so do so sparingly.
+ *
+ * \param context SDL_IOStream structure to close.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_OpenIO
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_CloseIO(SDL_IOStream *context);
+
+/**
+ * Get the properties associated with an SDL_IOStream.
+ *
+ * \param context a pointer to an SDL_IOStream structure.
+ * \returns a valid property ID on success or 0 on failure; call
+ *          SDL_GetError() for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC SDL_PropertiesID SDLCALL SDL_GetIOProperties(SDL_IOStream *context);
+
+/**
+ * Query the stream status of an SDL_IOStream.
+ *
+ * This information can be useful to decide if a short read or write was due
+ * to an error, an EOF, or a non-blocking operation that isn't yet ready to
+ * complete.
+ *
+ * An SDL_IOStream's status is only expected to change after a SDL_ReadIO or
+ * SDL_WriteIO call; don't expect it to change if you just call this query
+ * function in a tight loop.
+ *
+ * \param context the SDL_IOStream to query.
+ * \returns an SDL_IOStatus enum with the current state.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC SDL_IOStatus SDLCALL SDL_GetIOStatus(SDL_IOStream *context);
+
+/**
+ * Use this function to get the size of the data stream in an SDL_IOStream.
+ *
+ * \param context the SDL_IOStream to get the size of the data stream from.
+ * \returns the size of the data stream in the SDL_IOStream on success or a
+ *          negative error code on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC Sint64 SDLCALL SDL_GetIOSize(SDL_IOStream *context);
+
+/**
+ * Seek within an SDL_IOStream data stream.
+ *
+ * This function seeks to byte `offset`, relative to `whence`.
+ *
+ * `whence` may be any of the following values:
+ *
+ * - `SDL_IO_SEEK_SET`: seek from the beginning of data
+ * - `SDL_IO_SEEK_CUR`: seek relative to current read point
+ * - `SDL_IO_SEEK_END`: seek relative to the end of data
+ *
+ * If this stream can not seek, it will return -1.
+ *
+ * \param context a pointer to an SDL_IOStream structure.
+ * \param offset an offset in bytes, relative to `whence` location; can be
+ *               negative.
+ * \param whence any of `SDL_IO_SEEK_SET`, `SDL_IO_SEEK_CUR`,
+ *               `SDL_IO_SEEK_END`.
+ * \returns the final offset in the data stream after the seek or -1 on
+ *          failure; call SDL_GetError() for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_TellIO
+ */
+extern SDL_DECLSPEC Sint64 SDLCALL SDL_SeekIO(SDL_IOStream *context, Sint64 offset, SDL_IOWhence whence);
+
+/**
+ * Determine the current read/write offset in an SDL_IOStream data stream.
+ *
+ * SDL_TellIO is actually a wrapper function that calls the SDL_IOStream's
+ * `seek` method, with an offset of 0 bytes from `SDL_IO_SEEK_CUR`, to
+ * simplify application development.
+ *
+ * \param context an SDL_IOStream data stream object from which to get the
+ *                current offset.
+ * \returns the current offset in the stream, or -1 if the information can not
+ *          be determined.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_SeekIO
+ */
+extern SDL_DECLSPEC Sint64 SDLCALL SDL_TellIO(SDL_IOStream *context);
+
+/**
+ * Read from a data source.
+ *
+ * This function reads up `size` bytes from the data source to the area
+ * pointed at by `ptr`. This function may read less bytes than requested.
+ *
+ * This function will return zero when the data stream is completely read, and
+ * SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If zero is returned and
+ * the stream is not at EOF, SDL_GetIOStatus() will return a different error
+ * value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param context a pointer to an SDL_IOStream structure.
+ * \param ptr a pointer to a buffer to read data into.
+ * \param size the number of bytes to read from the data source.
+ * \returns the number of bytes read, or 0 on end of file or other failure;
+ *          call SDL_GetError() for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_WriteIO
+ * \sa SDL_GetIOStatus
+ */
+extern SDL_DECLSPEC size_t SDLCALL SDL_ReadIO(SDL_IOStream *context, void *ptr, size_t size);
+
+/**
+ * Write to an SDL_IOStream data stream.
+ *
+ * This function writes exactly `size` bytes from the area pointed at by `ptr`
+ * to the stream. If this fails for any reason, it'll return less than `size`
+ * to demonstrate how far the write progressed. On success, it returns `size`.
+ *
+ * On error, this function still attempts to write as much as possible, so it
+ * might return a positive value less than the requested write size.
+ *
+ * The caller can use SDL_GetIOStatus() to determine if the problem is
+ * recoverable, such as a non-blocking write that can simply be retried later,
+ * or a fatal error.
+ *
+ * \param context a pointer to an SDL_IOStream structure.
+ * \param ptr a pointer to a buffer containing data to write.
+ * \param size the number of bytes to write.
+ * \returns the number of bytes written, which will be less than `size` on
+ *          failure; call SDL_GetError() for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_IOprintf
+ * \sa SDL_ReadIO
+ * \sa SDL_SeekIO
+ * \sa SDL_FlushIO
+ * \sa SDL_GetIOStatus
+ */
+extern SDL_DECLSPEC size_t SDLCALL SDL_WriteIO(SDL_IOStream *context, const void *ptr, size_t size);
+
+/**
+ * Print to an SDL_IOStream data stream.
+ *
+ * This function does formatted printing to the stream.
+ *
+ * \param context a pointer to an SDL_IOStream structure.
+ * \param fmt a printf() style format string.
+ * \param ... additional parameters matching % tokens in the `fmt` string, if
+ *            any.
+ * \returns the number of bytes written or 0 on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_IOvprintf
+ * \sa SDL_WriteIO
+ */
+extern SDL_DECLSPEC size_t SDLCALL SDL_IOprintf(SDL_IOStream *context, SDL_PRINTF_FORMAT_STRING const char *fmt, ...)  SDL_PRINTF_VARARG_FUNC(2);
+
+/**
+ * Print to an SDL_IOStream data stream.
+ *
+ * This function does formatted printing to the stream.
+ *
+ * \param context a pointer to an SDL_IOStream structure.
+ * \param fmt a printf() style format string.
+ * \param ap a variable argument list.
+ * \returns the number of bytes written or 0 on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_IOprintf
+ * \sa SDL_WriteIO
+ */
+extern SDL_DECLSPEC size_t SDLCALL SDL_IOvprintf(SDL_IOStream *context, SDL_PRINTF_FORMAT_STRING const char *fmt, va_list ap) SDL_PRINTF_VARARG_FUNCV(2);
+
+/**
+ * Flush any buffered data in the stream.
+ *
+ * This function makes sure that any buffered data is written to the stream.
+ * Normally this isn't necessary but if the stream is a pipe or socket it
+ * guarantees that any pending data is sent.
+ *
+ * \param context SDL_IOStream structure to flush.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_OpenIO
+ * \sa SDL_WriteIO
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_FlushIO(SDL_IOStream *context);
+
+/**
+ * Load all the data from an SDL data stream.
+ *
+ * The data is allocated with a zero byte at the end (null terminated) for
+ * convenience. This extra byte is not included in the value reported via
+ * `datasize`.
+ *
+ * The data should be freed with SDL_free().
+ *
+ * \param src the SDL_IOStream to read all available data from.
+ * \param datasize a pointer filled in with the number of bytes read, may be
+ *                 NULL.
+ * \param closeio if true, calls SDL_CloseIO() on `src` before returning, even
+ *                in the case of an error.
+ * \returns the data or NULL on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_LoadFile
+ * \sa SDL_SaveFile_IO
+ */
+extern SDL_DECLSPEC void * SDLCALL SDL_LoadFile_IO(SDL_IOStream *src, size_t *datasize, bool closeio);
+
+/**
+ * Load all the data from a file path.
+ *
+ * The data is allocated with a zero byte at the end (null terminated) for
+ * convenience. This extra byte is not included in the value reported via
+ * `datasize`.
+ *
+ * The data should be freed with SDL_free().
+ *
+ * \param file the path to read all available data from.
+ * \param datasize if not NULL, will store the number of bytes read.
+ * \returns the data or NULL on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_LoadFile_IO
+ * \sa SDL_SaveFile
+ */
+extern SDL_DECLSPEC void * SDLCALL SDL_LoadFile(const char *file, size_t *datasize);
+
+/**
+ * Save all the data into an SDL data stream.
+ *
+ * \param src the SDL_IOStream to write all data to.
+ * \param data the data to be written. If datasize is 0, may be NULL or a
+ *             invalid pointer.
+ * \param datasize the number of bytes to be written.
+ * \param closeio if true, calls SDL_CloseIO() on `src` before returning, even
+ *                in the case of an error.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_SaveFile
+ * \sa SDL_LoadFile_IO
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SaveFile_IO(SDL_IOStream *src, const void *data, size_t datasize, bool closeio);
+
+/**
+ * Save all the data into a file path.
+ *
+ * \param file the path to write all available data into.
+ * \param data the data to be written. If datasize is 0, may be NULL or a
+ *             invalid pointer.
+ * \param datasize the number of bytes to be written.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ *
+ * \sa SDL_SaveFile_IO
+ * \sa SDL_LoadFile
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_SaveFile(const char *file, const void *data, size_t datasize);
+
+/**
+ *  \name Read endian functions
+ *
+ *  Read an item of the specified endianness and return in native format.
+ */
+/* @{ */
+
+/**
+ * Use this function to read a byte from an SDL_IOStream.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the SDL_IOStream to read from.
+ * \param value a pointer filled in with the data read.
+ * \returns true on success or false on failure or EOF; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadU8(SDL_IOStream *src, Uint8 *value);
+
+/**
+ * Use this function to read a signed byte from an SDL_IOStream.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the SDL_IOStream to read from.
+ * \param value a pointer filled in with the data read.
+ * \returns true on success or false on failure; call SDL_GetError() for more
+ *          information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadS8(SDL_IOStream *src, Sint8 *value);
+
+/**
+ * Use this function to read 16 bits of little-endian data from an
+ * SDL_IOStream and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadU16LE(SDL_IOStream *src, Uint16 *value);
+
+/**
+ * Use this function to read 16 bits of little-endian data from an
+ * SDL_IOStream and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadS16LE(SDL_IOStream *src, Sint16 *value);
+
+/**
+ * Use this function to read 16 bits of big-endian data from an SDL_IOStream
+ * and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadU16BE(SDL_IOStream *src, Uint16 *value);
+
+/**
+ * Use this function to read 16 bits of big-endian data from an SDL_IOStream
+ * and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadS16BE(SDL_IOStream *src, Sint16 *value);
+
+/**
+ * Use this function to read 32 bits of little-endian data from an
+ * SDL_IOStream and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadU32LE(SDL_IOStream *src, Uint32 *value);
+
+/**
+ * Use this function to read 32 bits of little-endian data from an
+ * SDL_IOStream and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadS32LE(SDL_IOStream *src, Sint32 *value);
+
+/**
+ * Use this function to read 32 bits of big-endian data from an SDL_IOStream
+ * and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadU32BE(SDL_IOStream *src, Uint32 *value);
+
+/**
+ * Use this function to read 32 bits of big-endian data from an SDL_IOStream
+ * and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadS32BE(SDL_IOStream *src, Sint32 *value);
+
+/**
+ * Use this function to read 64 bits of little-endian data from an
+ * SDL_IOStream and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadU64LE(SDL_IOStream *src, Uint64 *value);
+
+/**
+ * Use this function to read 64 bits of little-endian data from an
+ * SDL_IOStream and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadS64LE(SDL_IOStream *src, Sint64 *value);
+
+/**
+ * Use this function to read 64 bits of big-endian data from an SDL_IOStream
+ * and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadU64BE(SDL_IOStream *src, Uint64 *value);
+
+/**
+ * Use this function to read 64 bits of big-endian data from an SDL_IOStream
+ * and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * This function will return false when the data stream is completely read,
+ * and SDL_GetIOStatus() will return SDL_IO_STATUS_EOF. If false is returned
+ * and the stream is not at EOF, SDL_GetIOStatus() will return a different
+ * error value and SDL_GetError() will offer a human-readable message.
+ *
+ * \param src the stream from which to read data.
+ * \param value a pointer filled in with the data read.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_ReadS64BE(SDL_IOStream *src, Sint64 *value);
+/* @} *//* Read endian functions */
+
+/**
+ *  \name Write endian functions
+ *
+ *  Write an item of native format to the specified endianness.
+ */
+/* @{ */
+
+/**
+ * Use this function to write a byte to an SDL_IOStream.
+ *
+ * \param dst the SDL_IOStream to write to.
+ * \param value the byte value to write.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteU8(SDL_IOStream *dst, Uint8 value);
+
+/**
+ * Use this function to write a signed byte to an SDL_IOStream.
+ *
+ * \param dst the SDL_IOStream to write to.
+ * \param value the byte value to write.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteS8(SDL_IOStream *dst, Sint8 value);
+
+/**
+ * Use this function to write 16 bits in native format to an SDL_IOStream as
+ * little-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in little-endian
+ * format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteU16LE(SDL_IOStream *dst, Uint16 value);
+
+/**
+ * Use this function to write 16 bits in native format to an SDL_IOStream as
+ * little-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in little-endian
+ * format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteS16LE(SDL_IOStream *dst, Sint16 value);
+
+/**
+ * Use this function to write 16 bits in native format to an SDL_IOStream as
+ * big-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in big-endian format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteU16BE(SDL_IOStream *dst, Uint16 value);
+
+/**
+ * Use this function to write 16 bits in native format to an SDL_IOStream as
+ * big-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in big-endian format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteS16BE(SDL_IOStream *dst, Sint16 value);
+
+/**
+ * Use this function to write 32 bits in native format to an SDL_IOStream as
+ * little-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in little-endian
+ * format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteU32LE(SDL_IOStream *dst, Uint32 value);
+
+/**
+ * Use this function to write 32 bits in native format to an SDL_IOStream as
+ * little-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in little-endian
+ * format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteS32LE(SDL_IOStream *dst, Sint32 value);
+
+/**
+ * Use this function to write 32 bits in native format to an SDL_IOStream as
+ * big-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in big-endian format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteU32BE(SDL_IOStream *dst, Uint32 value);
+
+/**
+ * Use this function to write 32 bits in native format to an SDL_IOStream as
+ * big-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in big-endian format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteS32BE(SDL_IOStream *dst, Sint32 value);
+
+/**
+ * Use this function to write 64 bits in native format to an SDL_IOStream as
+ * little-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in little-endian
+ * format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteU64LE(SDL_IOStream *dst, Uint64 value);
+
+/**
+ * Use this function to write 64 bits in native format to an SDL_IOStream as
+ * little-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in little-endian
+ * format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteS64LE(SDL_IOStream *dst, Sint64 value);
+
+/**
+ * Use this function to write 64 bits in native format to an SDL_IOStream as
+ * big-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in big-endian format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteU64BE(SDL_IOStream *dst, Uint64 value);
+
+/**
+ * Use this function to write 64 bits in native format to an SDL_IOStream as
+ * big-endian data.
+ *
+ * SDL byteswaps the data only if necessary, so the application always
+ * specifies native format, and the data written will be in big-endian format.
+ *
+ * \param dst the stream to which data will be written.
+ * \param value the data to be written, in native format.
+ * \returns true on successful write or false on failure; call SDL_GetError()
+ *          for more information.
+ *
+ * \threadsafety This function is not thread safe.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+extern SDL_DECLSPEC bool SDLCALL SDL_WriteS64BE(SDL_IOStream *dst, Sint64 value);
+
+/* @} *//* Write endian functions */
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include <SDL3/SDL_close_code.h>
+
+#endif /* SDL_iostream_h_ */