--- /dev/null
+/*
+ Simple DirectMedia Layer
+ Copyright (C) 1997-2022 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.
+*/
+
+/**
+ * \file SDL_rwops.h
+ *
+ * This file provides a general interface for SDL to read and write
+ * data streams. It can easily be extended to files, memory, etc.
+ */
+
+#ifndef SDL_rwops_h_
+#define SDL_rwops_h_
+
+#include "SDL_stdinc.h"
+#include "SDL_error.h"
+
+#include "begin_code.h"
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* RWops Types */
+#define SDL_RWOPS_UNKNOWN 0U /**< Unknown stream type */
+#define SDL_RWOPS_WINFILE 1U /**< Win32 file */
+#define SDL_RWOPS_STDFILE 2U /**< Stdio file */
+#define SDL_RWOPS_JNIFILE 3U /**< Android asset */
+#define SDL_RWOPS_MEMORY 4U /**< Memory stream */
+#define SDL_RWOPS_MEMORY_RO 5U /**< Read-Only memory stream */
+#if defined(__VITA__)
+#define SDL_RWOPS_VITAFILE 6U /**< Vita file */
+#endif
+
+/**
+ * This is the read/write operation structure -- very basic.
+ */
+typedef struct SDL_RWops
+{
+ /**
+ * Return the size of the file in this rwops, or -1 if unknown
+ */
+ Sint64 (SDLCALL * size) (struct SDL_RWops * context);
+
+ /**
+ * Seek to \c offset relative to \c whence, one of stdio's whence values:
+ * RW_SEEK_SET, RW_SEEK_CUR, RW_SEEK_END
+ *
+ * \return the final offset in the data stream, or -1 on error.
+ */
+ Sint64 (SDLCALL * seek) (struct SDL_RWops * context, Sint64 offset,
+ int whence);
+
+ /**
+ * Read up to \c maxnum objects each of size \c size from the data
+ * stream to the area pointed at by \c ptr.
+ *
+ * \return the number of objects read, or 0 at error or end of file.
+ */
+ size_t (SDLCALL * read) (struct SDL_RWops * context, void *ptr,
+ size_t size, size_t maxnum);
+
+ /**
+ * Write exactly \c num objects each of size \c size from the area
+ * pointed at by \c ptr to data stream.
+ *
+ * \return the number of objects written, or 0 at error or end of file.
+ */
+ size_t (SDLCALL * write) (struct SDL_RWops * context, const void *ptr,
+ size_t size, size_t num);
+
+ /**
+ * Close and free an allocated SDL_RWops structure.
+ *
+ * \return 0 if successful or -1 on write error when flushing data.
+ */
+ int (SDLCALL * close) (struct SDL_RWops * context);
+
+ Uint32 type;
+ union
+ {
+#if defined(__ANDROID__)
+ struct
+ {
+ void *asset;
+ } androidio;
+#elif defined(__WIN32__)
+ struct
+ {
+ SDL_bool append;
+ void *h;
+ struct
+ {
+ void *data;
+ size_t size;
+ size_t left;
+ } buffer;
+ } windowsio;
+#elif defined(__VITA__)
+ struct
+ {
+ int h;
+ struct
+ {
+ void *data;
+ size_t size;
+ size_t left;
+ } buffer;
+ } vitaio;
+#endif
+
+#ifdef HAVE_STDIO_H
+ struct
+ {
+ SDL_bool autoclose;
+ FILE *fp;
+ } stdio;
+#endif
+ struct
+ {
+ Uint8 *base;
+ Uint8 *here;
+ Uint8 *stop;
+ } mem;
+ struct
+ {
+ void *data1;
+ void *data2;
+ } unknown;
+ } hidden;
+
+} SDL_RWops;
+
+
+/**
+ * \name RWFrom functions
+ *
+ * Functions to create SDL_RWops structures from various data streams.
+ */
+/* @{ */
+
+/**
+ * Use this function to create a new SDL_RWops 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.
+ *
+ * As a fallback, SDL_RWFromFile() will transparently open a matching filename
+ * in an Android app's `assets`.
+ *
+ * Closing the SDL_RWops will close the file handle SDL is holding internally.
+ *
+ * \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_RWops structure that is created, or NULL on
+ * failure; call SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_RWclose
+ * \sa SDL_RWFromConstMem
+ * \sa SDL_RWFromFP
+ * \sa SDL_RWFromMem
+ * \sa SDL_RWread
+ * \sa SDL_RWseek
+ * \sa SDL_RWtell
+ * \sa SDL_RWwrite
+ */
+extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromFile(const char *file,
+ const char *mode);
+
+#ifdef HAVE_STDIO_H
+
+extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromFP(FILE * fp, SDL_bool autoclose);
+
+#else
+
+/**
+ * Use this function to create an SDL_RWops structure from a standard I/O file
+ * pointer (stdio.h's `FILE*`).
+ *
+ * This function is not available on Windows, since files opened in an
+ * application on that platform cannot be used by a dynamically linked
+ * library.
+ *
+ * On some platforms, the first parameter is a `void*`, on others, it's a
+ * `FILE*`, depending on what system headers are available to SDL. It is
+ * always intended to be the `FILE*` type from the C runtime's stdio.h.
+ *
+ * \param fp the `FILE*` that feeds the SDL_RWops stream
+ * \param autoclose SDL_TRUE to close the `FILE*` when closing the SDL_RWops,
+ * SDL_FALSE to leave the `FILE*` open when the RWops is
+ * closed
+ * \returns a pointer to the SDL_RWops structure that is created, or NULL on
+ * failure; call SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_RWclose
+ * \sa SDL_RWFromConstMem
+ * \sa SDL_RWFromFile
+ * \sa SDL_RWFromMem
+ * \sa SDL_RWread
+ * \sa SDL_RWseek
+ * \sa SDL_RWtell
+ * \sa SDL_RWwrite
+ */
+extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromFP(void * fp,
+ SDL_bool autoclose);
+#endif
+
+/**
+ * Use this function to prepare a read-write memory buffer for use with
+ * SDL_RWops.
+ *
+ * This function sets up an SDL_RWops struct based on a memory area of a
+ * certain size, for both read and write access.
+ *
+ * This memory buffer is not copied by the RWops; 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 RWops never writes to the memory buffer, you
+ * should use SDL_RWFromConstMem() with a read-only buffer of memory instead.
+ *
+ * \param mem a pointer to a buffer to feed an SDL_RWops stream
+ * \param size the buffer size, in bytes
+ * \returns a pointer to a new SDL_RWops structure, or NULL if it fails; call
+ * SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_RWclose
+ * \sa SDL_RWFromConstMem
+ * \sa SDL_RWFromFile
+ * \sa SDL_RWFromFP
+ * \sa SDL_RWFromMem
+ * \sa SDL_RWread
+ * \sa SDL_RWseek
+ * \sa SDL_RWtell
+ * \sa SDL_RWwrite
+ */
+extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromMem(void *mem, int size);
+
+/**
+ * Use this function to prepare a read-only memory buffer for use with RWops.
+ *
+ * This function sets up an SDL_RWops struct based on a memory area of a
+ * certain size. It assumes the memory area is not writable.
+ *
+ * Attempting to write to this RWops stream will report an error without
+ * writing to the memory buffer.
+ *
+ * This memory buffer is not copied by the RWops; 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_RWFromMem()
+ * with a writable buffer of memory instead.
+ *
+ * \param mem a pointer to a read-only buffer to feed an SDL_RWops stream
+ * \param size the buffer size, in bytes
+ * \returns a pointer to a new SDL_RWops structure, or NULL if it fails; call
+ * SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_RWclose
+ * \sa SDL_RWFromConstMem
+ * \sa SDL_RWFromFile
+ * \sa SDL_RWFromFP
+ * \sa SDL_RWFromMem
+ * \sa SDL_RWread
+ * \sa SDL_RWseek
+ * \sa SDL_RWtell
+ */
+extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromConstMem(const void *mem,
+ int size);
+
+/* @} *//* RWFrom functions */
+
+
+/**
+ * Use this function to allocate an empty, unpopulated SDL_RWops structure.
+ *
+ * Applications do not need to use this function unless they are providing
+ * their own SDL_RWops implementation. If you just need a SDL_RWops to
+ * read/write a common data source, you should use the built-in
+ * implementations in SDL, like SDL_RWFromFile() or SDL_RWFromMem(), etc.
+ *
+ * You must free the returned pointer with SDL_FreeRW(). Depending on your
+ * operating system and compiler, there may be a difference between the
+ * malloc() and free() your program uses and the versions SDL calls
+ * internally. Trying to mix the two can cause crashing such as segmentation
+ * faults. Since all SDL_RWops must free themselves when their **close**
+ * method is called, all SDL_RWops must be allocated through this function, so
+ * they can all be freed correctly with SDL_FreeRW().
+ *
+ * \returns a pointer to the allocated memory on success, or NULL on failure;
+ * call SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_FreeRW
+ */
+extern DECLSPEC SDL_RWops *SDLCALL SDL_AllocRW(void);
+
+/**
+ * Use this function to free an SDL_RWops structure allocated by
+ * SDL_AllocRW().
+ *
+ * Applications do not need to use this function unless they are providing
+ * their own SDL_RWops implementation. If you just need a SDL_RWops to
+ * read/write a common data source, you should use the built-in
+ * implementations in SDL, like SDL_RWFromFile() or SDL_RWFromMem(), etc, and
+ * call the **close** method on those SDL_RWops pointers when you are done
+ * with them.
+ *
+ * Only use SDL_FreeRW() on pointers returned by SDL_AllocRW(). The pointer is
+ * invalid as soon as this function returns. Any extra memory allocated during
+ * creation of the SDL_RWops is not freed by SDL_FreeRW(); the programmer must
+ * be responsible for managing that memory in their **close** method.
+ *
+ * \param area the SDL_RWops structure to be freed
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_AllocRW
+ */
+extern DECLSPEC void SDLCALL SDL_FreeRW(SDL_RWops * area);
+
+#define RW_SEEK_SET 0 /**< Seek from the beginning of data */
+#define RW_SEEK_CUR 1 /**< Seek relative to current read point */
+#define RW_SEEK_END 2 /**< Seek relative to the end of data */
+
+/**
+ * Use this function to get the size of the data stream in an SDL_RWops.
+ *
+ * Prior to SDL 2.0.10, this function was a macro.
+ *
+ * \param context the SDL_RWops to get the size of the data stream from
+ * \returns the size of the data stream in the SDL_RWops on success, -1 if
+ * unknown or a negative error code on failure; call SDL_GetError()
+ * for more information.
+ *
+ * \since This function is available since SDL 2.0.10.
+ */
+extern DECLSPEC Sint64 SDLCALL SDL_RWsize(SDL_RWops *context);
+
+/**
+ * Seek within an SDL_RWops data stream.
+ *
+ * This function seeks to byte `offset`, relative to `whence`.
+ *
+ * `whence` may be any of the following values:
+ *
+ * - `RW_SEEK_SET`: seek from the beginning of data
+ * - `RW_SEEK_CUR`: seek relative to current read point
+ * - `RW_SEEK_END`: seek relative to the end of data
+ *
+ * If this stream can not seek, it will return -1.
+ *
+ * SDL_RWseek() is actually a wrapper function that calls the SDL_RWops's
+ * `seek` method appropriately, to simplify application development.
+ *
+ * Prior to SDL 2.0.10, this function was a macro.
+ *
+ * \param context a pointer to an SDL_RWops structure
+ * \param offset an offset in bytes, relative to **whence** location; can be
+ * negative
+ * \param whence any of `RW_SEEK_SET`, `RW_SEEK_CUR`, `RW_SEEK_END`
+ * \returns the final offset in the data stream after the seek or -1 on error.
+ *
+ * \since This function is available since SDL 2.0.10.
+ *
+ * \sa SDL_RWclose
+ * \sa SDL_RWFromConstMem
+ * \sa SDL_RWFromFile
+ * \sa SDL_RWFromFP
+ * \sa SDL_RWFromMem
+ * \sa SDL_RWread
+ * \sa SDL_RWtell
+ * \sa SDL_RWwrite
+ */
+extern DECLSPEC Sint64 SDLCALL SDL_RWseek(SDL_RWops *context,
+ Sint64 offset, int whence);
+
+/**
+ * Determine the current read/write offset in an SDL_RWops data stream.
+ *
+ * SDL_RWtell is actually a wrapper function that calls the SDL_RWops's `seek`
+ * method, with an offset of 0 bytes from `RW_SEEK_CUR`, to simplify
+ * application development.
+ *
+ * Prior to SDL 2.0.10, this function was a macro.
+ *
+ * \param context a SDL_RWops 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.
+ *
+ * \since This function is available since SDL 2.0.10.
+ *
+ * \sa SDL_RWclose
+ * \sa SDL_RWFromConstMem
+ * \sa SDL_RWFromFile
+ * \sa SDL_RWFromFP
+ * \sa SDL_RWFromMem
+ * \sa SDL_RWread
+ * \sa SDL_RWseek
+ * \sa SDL_RWwrite
+ */
+extern DECLSPEC Sint64 SDLCALL SDL_RWtell(SDL_RWops *context);
+
+/**
+ * Read from a data source.
+ *
+ * This function reads up to `maxnum` objects each of size `size` from the
+ * data source to the area pointed at by `ptr`. This function may read less
+ * objects than requested. It will return zero when there has been an error or
+ * the data stream is completely read.
+ *
+ * SDL_RWread() is actually a function wrapper that calls the SDL_RWops's
+ * `read` method appropriately, to simplify application development.
+ *
+ * Prior to SDL 2.0.10, this function was a macro.
+ *
+ * \param context a pointer to an SDL_RWops structure
+ * \param ptr a pointer to a buffer to read data into
+ * \param size the size of each object to read, in bytes
+ * \param maxnum the maximum number of objects to be read
+ * \returns the number of objects read, or 0 at error or end of file; call
+ * SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.0.10.
+ *
+ * \sa SDL_RWclose
+ * \sa SDL_RWFromConstMem
+ * \sa SDL_RWFromFile
+ * \sa SDL_RWFromFP
+ * \sa SDL_RWFromMem
+ * \sa SDL_RWseek
+ * \sa SDL_RWwrite
+ */
+extern DECLSPEC size_t SDLCALL SDL_RWread(SDL_RWops *context,
+ void *ptr, size_t size,
+ size_t maxnum);
+
+/**
+ * Write to an SDL_RWops data stream.
+ *
+ * This function writes exactly `num` objects each of size `size` from the
+ * area pointed at by `ptr` to the stream. If this fails for any reason, it'll
+ * return less than `num` to demonstrate how far the write progressed. On
+ * success, it returns `num`.
+ *
+ * SDL_RWwrite is actually a function wrapper that calls the SDL_RWops's
+ * `write` method appropriately, to simplify application development.
+ *
+ * Prior to SDL 2.0.10, this function was a macro.
+ *
+ * \param context a pointer to an SDL_RWops structure
+ * \param ptr a pointer to a buffer containing data to write
+ * \param size the size of an object to write, in bytes
+ * \param num the number of objects to write
+ * \returns the number of objects written, which will be less than **num** on
+ * error; call SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.0.10.
+ *
+ * \sa SDL_RWclose
+ * \sa SDL_RWFromConstMem
+ * \sa SDL_RWFromFile
+ * \sa SDL_RWFromFP
+ * \sa SDL_RWFromMem
+ * \sa SDL_RWread
+ * \sa SDL_RWseek
+ */
+extern DECLSPEC size_t SDLCALL SDL_RWwrite(SDL_RWops *context,
+ const void *ptr, size_t size,
+ size_t num);
+
+/**
+ * Close and free an allocated SDL_RWops structure.
+ *
+ * SDL_RWclose() closes and cleans up the SDL_RWops stream. It releases any
+ * resources used by the stream and frees the SDL_RWops itself with
+ * SDL_FreeRW(). This returns 0 on success, or -1 if the stream failed to
+ * flush to its output (e.g. to disk).
+ *
+ * Note that if this fails to flush the stream to disk, this function reports
+ * an error, but the SDL_RWops is still invalid once this function returns.
+ *
+ * Prior to SDL 2.0.10, this function was a macro.
+ *
+ * \param context SDL_RWops structure to close
+ * \returns 0 on success or a negative error code on failure; call
+ * SDL_GetError() for more information.
+ *
+ * \since This function is available since SDL 2.0.10.
+ *
+ * \sa SDL_RWFromConstMem
+ * \sa SDL_RWFromFile
+ * \sa SDL_RWFromFP
+ * \sa SDL_RWFromMem
+ * \sa SDL_RWread
+ * \sa SDL_RWseek
+ * \sa SDL_RWwrite
+ */
+extern DECLSPEC int SDLCALL SDL_RWclose(SDL_RWops *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_RWops to read all available data from
+ * \param datasize if not NULL, will store the number of bytes read
+ * \param freesrc if non-zero, calls SDL_RWclose() on `src` before returning
+ * \returns the data, or NULL if there was an error.
+ *
+ * \since This function is available since SDL 2.0.6.
+ */
+extern DECLSPEC void *SDLCALL SDL_LoadFile_RW(SDL_RWops *src,
+ size_t *datasize,
+ int freesrc);
+
+/**
+ * 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().
+ *
+ * Prior to SDL 2.0.10, this function was a macro wrapping around
+ * SDL_LoadFile_RW.
+ *
+ * \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 if there was an error.
+ *
+ * \since This function is available since SDL 2.0.10.
+ */
+extern DECLSPEC void *SDLCALL SDL_LoadFile(const char *file, 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_RWops.
+ *
+ * \param src the SDL_RWops to read from
+ * \returns the read byte on success or 0 on failure; call SDL_GetError() for
+ * more information.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_WriteU8
+ */
+extern DECLSPEC Uint8 SDLCALL SDL_ReadU8(SDL_RWops * src);
+
+/**
+ * Use this function to read 16 bits of little-endian data from an SDL_RWops
+ * and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * \param src the stream from which to read data
+ * \returns 16 bits of data in the native byte order of the platform.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_ReadBE16
+ */
+extern DECLSPEC Uint16 SDLCALL SDL_ReadLE16(SDL_RWops * src);
+
+/**
+ * Use this function to read 16 bits of big-endian data from an SDL_RWops and
+ * return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * \param src the stream from which to read data
+ * \returns 16 bits of data in the native byte order of the platform.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_ReadLE16
+ */
+extern DECLSPEC Uint16 SDLCALL SDL_ReadBE16(SDL_RWops * src);
+
+/**
+ * Use this function to read 32 bits of little-endian data from an SDL_RWops
+ * and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * \param src the stream from which to read data
+ * \returns 32 bits of data in the native byte order of the platform.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_ReadBE32
+ */
+extern DECLSPEC Uint32 SDLCALL SDL_ReadLE32(SDL_RWops * src);
+
+/**
+ * Use this function to read 32 bits of big-endian data from an SDL_RWops and
+ * return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * \param src the stream from which to read data
+ * \returns 32 bits of data in the native byte order of the platform.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_ReadLE32
+ */
+extern DECLSPEC Uint32 SDLCALL SDL_ReadBE32(SDL_RWops * src);
+
+/**
+ * Use this function to read 64 bits of little-endian data from an SDL_RWops
+ * and return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * \param src the stream from which to read data
+ * \returns 64 bits of data in the native byte order of the platform.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_ReadBE64
+ */
+extern DECLSPEC Uint64 SDLCALL SDL_ReadLE64(SDL_RWops * src);
+
+/**
+ * Use this function to read 64 bits of big-endian data from an SDL_RWops and
+ * return in native format.
+ *
+ * SDL byteswaps the data only if necessary, so the data returned will be in
+ * the native byte order.
+ *
+ * \param src the stream from which to read data
+ * \returns 64 bits of data in the native byte order of the platform.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_ReadLE64
+ */
+extern DECLSPEC Uint64 SDLCALL SDL_ReadBE64(SDL_RWops * src);
+/* @} *//* 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_RWops.
+ *
+ * \param dst the SDL_RWops to write to
+ * \param value the byte value to write
+ * \returns 1 on success or 0 on failure; call SDL_GetError() for more
+ * information.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_ReadU8
+ */
+extern DECLSPEC size_t SDLCALL SDL_WriteU8(SDL_RWops * dst, Uint8 value);
+
+/**
+ * Use this function to write 16 bits in native format to a SDL_RWops 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 1 on successful write, 0 on error.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_WriteBE16
+ */
+extern DECLSPEC size_t SDLCALL SDL_WriteLE16(SDL_RWops * dst, Uint16 value);
+
+/**
+ * Use this function to write 16 bits in native format to a SDL_RWops 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 1 on successful write, 0 on error.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_WriteLE16
+ */
+extern DECLSPEC size_t SDLCALL SDL_WriteBE16(SDL_RWops * dst, Uint16 value);
+
+/**
+ * Use this function to write 32 bits in native format to a SDL_RWops 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 1 on successful write, 0 on error.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_WriteBE32
+ */
+extern DECLSPEC size_t SDLCALL SDL_WriteLE32(SDL_RWops * dst, Uint32 value);
+
+/**
+ * Use this function to write 32 bits in native format to a SDL_RWops 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 1 on successful write, 0 on error.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_WriteLE32
+ */
+extern DECLSPEC size_t SDLCALL SDL_WriteBE32(SDL_RWops * dst, Uint32 value);
+
+/**
+ * Use this function to write 64 bits in native format to a SDL_RWops 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 1 on successful write, 0 on error.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_WriteBE64
+ */
+extern DECLSPEC size_t SDLCALL SDL_WriteLE64(SDL_RWops * dst, Uint64 value);
+
+/**
+ * Use this function to write 64 bits in native format to a SDL_RWops 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 1 on successful write, 0 on error.
+ *
+ * \since This function is available since SDL 2.0.0.
+ *
+ * \sa SDL_WriteLE64
+ */
+extern DECLSPEC size_t SDLCALL SDL_WriteBE64(SDL_RWops * dst, Uint64 value);
+/* @} *//* Write endian functions */
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include "close_code.h"
+
+#endif /* SDL_rwops_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */
projects / xonotic / darkplaces.git / blobdiff