1046 lines
36 KiB
C
1046 lines
36 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2024 Sam Lantinga <slouken@libsdl.org>
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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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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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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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* \file SDL_rwops.h
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*
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* This file provides a general interface for SDL to read and write
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* data streams. It can easily be extended to files, memory, etc.
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*/
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#ifndef SDL_rwops_h_
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#define SDL_rwops_h_
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#include <SDL3/SDL_stdinc.h>
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#include <SDL3/SDL_error.h>
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#include <SDL3/SDL_properties.h>
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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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/* RWops types */
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#define SDL_RWOPS_UNKNOWN 0 /**< Unknown stream type */
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#define SDL_RWOPS_WINFILE 1 /**< Win32 file */
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#define SDL_RWOPS_STDFILE 2 /**< Stdio file */
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#define SDL_RWOPS_JNIFILE 3 /**< Android asset */
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#define SDL_RWOPS_MEMORY 4 /**< Memory stream */
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#define SDL_RWOPS_MEMORY_RO 5 /**< Read-Only memory stream */
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/* RWops status, set by a read or write operation */
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#define SDL_RWOPS_STATUS_READY 0 /**< Everything is ready */
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#define SDL_RWOPS_STATUS_ERROR 1 /**< Read or write I/O error */
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#define SDL_RWOPS_STATUS_EOF 2 /**< End of file */
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#define SDL_RWOPS_STATUS_NOT_READY 3 /**< Non blocking I/O, not ready */
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#define SDL_RWOPS_STATUS_READONLY 4 /**< Tried to write a read-only buffer */
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#define SDL_RWOPS_STATUS_WRITEONLY 5 /**< Tried to read a write-only buffer */
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/**
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* This is the read/write operation structure -- very basic.
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*/
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typedef struct SDL_RWops
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{
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/**
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* Return the number of bytes in this rwops
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*
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* \return the total size of the data stream, or -1 on error.
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*/
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Sint64 (SDLCALL *size)(struct SDL_RWops *context);
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/**
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* Seek to \c offset relative to \c whence, one of stdio's whence values:
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* SDL_RW_SEEK_SET, SDL_RW_SEEK_CUR, SDL_RW_SEEK_END
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*
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* \return the final offset in the data stream, or -1 on error.
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*/
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Sint64 (SDLCALL *seek)(struct SDL_RWops *context, Sint64 offset, int whence);
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/**
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* Read up to \c size bytes from the data stream to the area pointed
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* at by \c ptr.
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*
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* \return the number of bytes read
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*/
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size_t (SDLCALL *read)(struct SDL_RWops *context, void *ptr, size_t size);
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/**
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* Write exactly \c size bytes from the area pointed at by \c ptr
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* to data stream.
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*
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* \return the number of bytes written
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*/
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size_t (SDLCALL *write)(struct SDL_RWops *context, const void *ptr, size_t size);
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/**
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* Close and free an allocated SDL_RWops structure.
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*
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* \return 0 if successful or -1 on write error when flushing data.
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*/
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int (SDLCALL *close)(struct SDL_RWops *context);
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Uint32 type;
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Uint32 status;
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SDL_PropertiesID props;
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union
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{
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#ifdef __ANDROID__
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struct
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{
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void *asset;
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} androidio;
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#elif defined(__WIN32__) || defined(__GDK__) || defined(__WINRT__)
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struct
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{
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SDL_bool append;
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void *h;
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struct
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{
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void *data;
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size_t size;
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size_t left;
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} buffer;
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} windowsio;
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#endif
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struct
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{
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SDL_bool autoclose;
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void *fp;
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} stdio;
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struct
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{
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Uint8 *base;
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Uint8 *here;
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Uint8 *stop;
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} mem;
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struct
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{
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void *data1;
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void *data2;
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} unknown;
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} hidden;
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} SDL_RWops;
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/**
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* \name RWFrom functions
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*
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* Functions to create SDL_RWops structures from various data streams.
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*/
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/* @{ */
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/**
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* Use this function to create a new SDL_RWops structure for reading from
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* and/or writing to a named file.
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*
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* The `mode` string is treated roughly the same as in a call to the C
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* library's fopen(), even if SDL doesn't happen to use fopen() behind the
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* scenes.
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*
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* Available `mode` strings:
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*
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* - "r": Open a file for reading. The file must exist.
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* - "w": Create an empty file for writing. If a file with the same name
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* already exists its content is erased and the file is treated as a new
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* empty file.
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* - "a": Append to a file. Writing operations append data at the end of the
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* file. The file is created if it does not exist.
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* - "r+": Open a file for update both reading and writing. The file must
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* exist.
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* - "w+": Create an empty file for both reading and writing. If a file with
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* the same name already exists its content is erased and the file is
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* treated as a new empty file.
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* - "a+": Open a file for reading and appending. All writing operations are
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* performed at the end of the file, protecting the previous content to be
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* overwritten. You can reposition (fseek, rewind) the internal pointer to
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* anywhere in the file for reading, but writing operations will move it
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* back to the end of file. The file is created if it does not exist.
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*
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* **NOTE**: In order to open a file as a binary file, a "b" character has to
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* be included in the `mode` string. This additional "b" character can either
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* be appended at the end of the string (thus making the following compound
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* modes: "rb", "wb", "ab", "r+b", "w+b", "a+b") or be inserted between the
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* letter and the "+" sign for the mixed modes ("rb+", "wb+", "ab+").
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* Additional characters may follow the sequence, although they should have no
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* effect. For example, "t" is sometimes appended to make explicit the file is
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* a text file.
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*
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* This function supports Unicode filenames, but they must be encoded in UTF-8
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* format, regardless of the underlying operating system.
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*
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* As a fallback, SDL_RWFromFile() will transparently open a matching filename
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* in an Android app's `assets`.
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*
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* Closing the SDL_RWops will close the file handle SDL is holding internally.
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*
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* \param file a UTF-8 string representing the filename to open
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* \param mode an ASCII string representing the mode to be used for opening
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* the file.
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* \returns a pointer to the SDL_RWops structure that is created, or NULL on
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* failure; call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_RWclose
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* \sa SDL_RWFromConstMem
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* \sa SDL_RWFromMem
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* \sa SDL_RWread
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* \sa SDL_RWseek
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* \sa SDL_RWtell
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* \sa SDL_RWwrite
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*/
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extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromFile(const char *file, const char *mode);
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/**
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* Use this function to prepare a read-write memory buffer for use with
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* SDL_RWops.
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*
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* This function sets up an SDL_RWops struct based on a memory area of a
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* certain size, for both read and write access.
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*
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* This memory buffer is not copied by the RWops; the pointer you provide must
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* remain valid until you close the stream. Closing the stream will not free
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* the original buffer.
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*
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* If you need to make sure the RWops never writes to the memory buffer, you
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* should use SDL_RWFromConstMem() with a read-only buffer of memory instead.
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*
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* \param mem a pointer to a buffer to feed an SDL_RWops stream
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* \param size the buffer size, in bytes
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* \returns a pointer to a new SDL_RWops structure, or NULL if it fails; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_RWclose
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* \sa SDL_RWFromConstMem
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* \sa SDL_RWFromFile
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* \sa SDL_RWFromMem
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* \sa SDL_RWread
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* \sa SDL_RWseek
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* \sa SDL_RWtell
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* \sa SDL_RWwrite
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*/
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extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromMem(void *mem, size_t size);
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/**
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* Use this function to prepare a read-only memory buffer for use with RWops.
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*
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* This function sets up an SDL_RWops struct based on a memory area of a
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* certain size. It assumes the memory area is not writable.
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*
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* Attempting to write to this RWops stream will report an error without
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* writing to the memory buffer.
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*
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* This memory buffer is not copied by the RWops; the pointer you provide must
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* remain valid until you close the stream. Closing the stream will not free
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* the original buffer.
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*
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* If you need to write to a memory buffer, you should use SDL_RWFromMem()
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* with a writable buffer of memory instead.
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*
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* \param mem a pointer to a read-only buffer to feed an SDL_RWops stream
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* \param size the buffer size, in bytes
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* \returns a pointer to a new SDL_RWops structure, or NULL if it fails; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_RWclose
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* \sa SDL_RWFromConstMem
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* \sa SDL_RWFromFile
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* \sa SDL_RWFromMem
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* \sa SDL_RWread
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* \sa SDL_RWseek
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* \sa SDL_RWtell
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*/
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extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromConstMem(const void *mem, size_t size);
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/* @} *//* RWFrom functions */
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/**
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* Use this function to allocate an empty, unpopulated SDL_RWops structure.
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*
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* Applications do not need to use this function unless they are providing
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* their own SDL_RWops implementation. If you just need an SDL_RWops to
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* read/write a common data source, you should use the built-in
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* implementations in SDL, like SDL_RWFromFile() or SDL_RWFromMem(), etc.
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*
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* You must free the returned pointer with SDL_DestroyRW(). Depending on your
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* operating system and compiler, there may be a difference between the
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* malloc() and free() your program uses and the versions SDL calls
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* internally. Trying to mix the two can cause crashing such as segmentation
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* faults. Since all SDL_RWops must free themselves when their **close**
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* method is called, all SDL_RWops must be allocated through this function, so
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* they can all be freed correctly with SDL_DestroyRW().
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*
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* \returns a pointer to the allocated memory on success, or NULL on failure;
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* call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_DestroyRW
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*/
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extern DECLSPEC SDL_RWops *SDLCALL SDL_CreateRW(void);
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/**
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* Use this function to free an SDL_RWops structure allocated by
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* SDL_CreateRW().
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*
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* Applications do not need to use this function unless they are providing
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* their own SDL_RWops implementation. If you just need an SDL_RWops to
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* read/write a common data source, you should use the built-in
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* implementations in SDL, like SDL_RWFromFile() or SDL_RWFromMem(), etc, and
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* call the **close** method on those SDL_RWops pointers when you are done
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* with them.
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*
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* Only use SDL_DestroyRW() on pointers returned by SDL_CreateRW(). The
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* pointer is invalid as soon as this function returns. Any extra memory
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* allocated during creation of the SDL_RWops is not freed by SDL_DestroyRW();
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* the programmer must be responsible for managing that memory in their
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* **close** method.
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*
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* \param context the SDL_RWops structure to be freed
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_CreateRW
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*/
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extern DECLSPEC void SDLCALL SDL_DestroyRW(SDL_RWops *context);
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/**
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* Get the properties associated with an SDL_RWops.
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*
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* \param context a pointer to an SDL_RWops structure
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* \returns a valid property ID on success or 0 on failure; call
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* SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_GetProperty
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* \sa SDL_SetProperty
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*/
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extern DECLSPEC SDL_PropertiesID SDLCALL SDL_GetRWProperties(SDL_RWops *context);
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#define SDL_RW_SEEK_SET 0 /**< Seek from the beginning of data */
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#define SDL_RW_SEEK_CUR 1 /**< Seek relative to current read point */
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#define SDL_RW_SEEK_END 2 /**< Seek relative to the end of data */
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/**
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* Use this function to get the size of the data stream in an SDL_RWops.
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*
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* \param context the SDL_RWops to get the size of the data stream from
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* \returns the size of the data stream in the SDL_RWops on success or a
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* negative error code on failure; call SDL_GetError() for more
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* information.
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*
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* \since This function is available since SDL 3.0.0.
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*/
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extern DECLSPEC Sint64 SDLCALL SDL_RWsize(SDL_RWops *context);
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/**
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* Seek within an SDL_RWops data stream.
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*
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* This function seeks to byte `offset`, relative to `whence`.
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*
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* `whence` may be any of the following values:
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*
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* - `SDL_RW_SEEK_SET`: seek from the beginning of data
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* - `SDL_RW_SEEK_CUR`: seek relative to current read point
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* - `SDL_RW_SEEK_END`: seek relative to the end of data
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*
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* If this stream can not seek, it will return -1.
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*
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* SDL_RWseek() is actually a wrapper function that calls the SDL_RWops's
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* `seek` method appropriately, to simplify application development.
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*
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* \param context a pointer to an SDL_RWops structure
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* \param offset an offset in bytes, relative to **whence** location; can be
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* negative
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* \param whence any of `SDL_RW_SEEK_SET`, `SDL_RW_SEEK_CUR`,
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* `SDL_RW_SEEK_END`
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* \returns the final offset in the data stream after the seek or a negative
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* error code on failure; call SDL_GetError() for more information.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_RWclose
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* \sa SDL_RWFromConstMem
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* \sa SDL_RWFromFile
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* \sa SDL_RWFromMem
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* \sa SDL_RWread
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* \sa SDL_RWtell
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* \sa SDL_RWwrite
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*/
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extern DECLSPEC Sint64 SDLCALL SDL_RWseek(SDL_RWops *context, Sint64 offset, int whence);
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/**
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* Determine the current read/write offset in an SDL_RWops data stream.
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*
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* SDL_RWtell is actually a wrapper function that calls the SDL_RWops's `seek`
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* method, with an offset of 0 bytes from `SDL_RW_SEEK_CUR`, to simplify
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* application development.
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*
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* \param context an SDL_RWops data stream object from which to get the
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* current offset
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* \returns the current offset in the stream, or -1 if the information can not
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* be determined.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_RWclose
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* \sa SDL_RWFromConstMem
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* \sa SDL_RWFromFile
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* \sa SDL_RWFromMem
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* \sa SDL_RWread
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* \sa SDL_RWseek
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* \sa SDL_RWwrite
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*/
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extern DECLSPEC Sint64 SDLCALL SDL_RWtell(SDL_RWops *context);
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/**
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* Read from a data source.
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*
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* This function reads up `size` bytes from the data source to the area
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* pointed at by `ptr`. This function may read less bytes than requested. It
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* will return zero when the data stream is completely read, or -1 on error.
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* For streams that support non-blocking operation, if nothing was read
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* because it would require blocking, this function returns -2 to distinguish
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* that this is not an error or end-of-file, and the caller can try again
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* later.
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*
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* SDL_RWread() is actually a function wrapper that calls the SDL_RWops's
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* `read` method appropriately, to simplify application development.
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*
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* It is an error to specify a negative `size`, but this parameter is signed
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* so you definitely cannot overflow the return value on a successful run with
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* enormous amounts of data.
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*
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* \param context a pointer to an SDL_RWops structure
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* \param ptr a pointer to a buffer to read data into
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* \param size the number of bytes to read from the data source.
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* \returns the number of bytes read, or 0 on end of file or other error.
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*
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* \since This function is available since SDL 3.0.0.
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*
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* \sa SDL_RWclose
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* \sa SDL_RWFromConstMem
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* \sa SDL_RWFromFile
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* \sa SDL_RWFromMem
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* \sa SDL_RWseek
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* \sa SDL_RWwrite
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*/
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extern DECLSPEC size_t SDLCALL SDL_RWread(SDL_RWops *context, void *ptr, size_t size);
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/**
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* Write to an SDL_RWops data stream.
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*
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* This function writes exactly `size` bytes from the area pointed at by `ptr`
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* to the stream. If this fails for any reason, it'll return less than `size`
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* to demonstrate how far the write progressed. On success, it returns `num`.
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*
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* On error, this function still attempts to write as much as possible, so it
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* might return a positive value less than the requested write size. If the
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* function failed to write anything and there was an actual error, it will
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* return -1. For streams that support non-blocking operation, if nothing was
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* written because it would require blocking, this function returns -2 to
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* distinguish that this is not an error and the caller can try again later.
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*
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* SDL_RWwrite is actually a function wrapper that calls the SDL_RWops's
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* `write` method appropriately, to simplify application development.
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*
|
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* It is an error to specify a negative `size`, but this parameter is signed
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* so you definitely cannot overflow the return value on a successful run with
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* enormous amounts of data.
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*
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* \param context a pointer to an SDL_RWops structure
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* \param ptr a pointer to a buffer containing data to write
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* \param size the number of bytes to write
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* \returns the number of bytes written, which will be less than `num` on
|
|
* error; call SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_RWclose
|
|
* \sa SDL_RWFromConstMem
|
|
* \sa SDL_RWFromFile
|
|
* \sa SDL_RWFromMem
|
|
* \sa SDL_RWprint
|
|
* \sa SDL_RWread
|
|
* \sa SDL_RWseek
|
|
*/
|
|
extern DECLSPEC size_t SDLCALL SDL_RWwrite(SDL_RWops *context, const void *ptr, size_t size);
|
|
|
|
/**
|
|
* Print to an SDL_RWops data stream.
|
|
*
|
|
* This function does formatted printing to the stream.
|
|
*
|
|
* \param context a pointer to an SDL_RWops 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 error; call SDL_GetError()
|
|
* for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_RWclose
|
|
* \sa SDL_RWFromConstMem
|
|
* \sa SDL_RWFromFile
|
|
* \sa SDL_RWFromMem
|
|
* \sa SDL_RWread
|
|
* \sa SDL_RWseek
|
|
* \sa SDL_RWwrite
|
|
*/
|
|
extern DECLSPEC size_t SDLCALL SDL_RWprintf(SDL_RWops *context, SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(2);
|
|
|
|
/**
|
|
* Print to an SDL_RWops data stream.
|
|
*
|
|
* This function does formatted printing to the stream.
|
|
*
|
|
* \param context a pointer to an SDL_RWops structure
|
|
* \param fmt a printf() style format string
|
|
* \param ap a variable argument list
|
|
* \returns the number of bytes written, or 0 on error; call SDL_GetError()
|
|
* for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_RWclose
|
|
* \sa SDL_RWFromConstMem
|
|
* \sa SDL_RWFromFile
|
|
* \sa SDL_RWFromMem
|
|
* \sa SDL_RWread
|
|
* \sa SDL_RWseek
|
|
* \sa SDL_RWwrite
|
|
*/
|
|
extern DECLSPEC size_t SDLCALL SDL_RWvprintf(SDL_RWops *context, SDL_PRINTF_FORMAT_STRING const char *fmt, va_list ap) SDL_PRINTF_VARARG_FUNCV(2);
|
|
|
|
/**
|
|
* 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_DestroyRW(). 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.
|
|
*
|
|
* \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 3.0.0.
|
|
*
|
|
* \sa SDL_RWFromConstMem
|
|
* \sa SDL_RWFromFile
|
|
* \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 SDL_TRUE, calls SDL_RWclose() on `src` before returning,
|
|
* even in the case of an error
|
|
* \returns the data, or NULL if there was an error.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC void *SDLCALL SDL_LoadFile_RW(SDL_RWops *src, size_t *datasize, SDL_bool 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().
|
|
*
|
|
* \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 3.0.0.
|
|
*/
|
|
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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on success or SDL_FALSE on failure; call SDL_GetError()
|
|
* for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadU8(SDL_RWops *src, Uint8 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadU16LE(SDL_RWops *src, Uint16 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadS16LE(SDL_RWops *src, Sint16 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadU16BE(SDL_RWops *src, Uint16 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadS16BE(SDL_RWops *src, Sint16 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadU32LE(SDL_RWops *src, Uint32 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadS32LE(SDL_RWops *src, Sint32 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadU32BE(SDL_RWops *src, Uint32 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadS32BE(SDL_RWops *src, Sint32 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadU64LE(SDL_RWops *src, Uint64 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadS64LE(SDL_RWops *src, Sint64 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadU64BE(SDL_RWops *src, Uint64 *value);
|
|
|
|
/**
|
|
* 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
|
|
* \param value a pointer filled in with the data read
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_ReadS64BE(SDL_RWops *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_RWops.
|
|
*
|
|
* \param dst the SDL_RWops to write to
|
|
* \param value the byte value to write
|
|
* \returns SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteU8(SDL_RWops *dst, Uint8 value);
|
|
|
|
/**
|
|
* Use this function to write 16 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteU16LE(SDL_RWops *dst, Uint16 value);
|
|
|
|
/**
|
|
* Use this function to write 16 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteS16LE(SDL_RWops *dst, Sint16 value);
|
|
|
|
/**
|
|
* Use this function to write 16 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteU16BE(SDL_RWops *dst, Uint16 value);
|
|
|
|
/**
|
|
* Use this function to write 16 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteS16BE(SDL_RWops *dst, Sint16 value);
|
|
|
|
/**
|
|
* Use this function to write 32 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteU32LE(SDL_RWops *dst, Uint32 value);
|
|
|
|
/**
|
|
* Use this function to write 32 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteS32LE(SDL_RWops *dst, Sint32 value);
|
|
|
|
/**
|
|
* Use this function to write 32 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteU32BE(SDL_RWops *dst, Uint32 value);
|
|
|
|
/**
|
|
* Use this function to write 32 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteS32BE(SDL_RWops *dst, Sint32 value);
|
|
|
|
/**
|
|
* Use this function to write 64 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteU64LE(SDL_RWops *dst, Uint64 value);
|
|
|
|
/**
|
|
* Use this function to write 64 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteS64LE(SDL_RWops *dst, Sint64 value);
|
|
|
|
/**
|
|
* Use this function to write 64 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteU64BE(SDL_RWops *dst, Uint64 value);
|
|
|
|
/**
|
|
* Use this function to write 64 bits in native format to an 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 SDL_TRUE on successful write, SDL_FALSE on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_WriteS64BE(SDL_RWops *dst, Sint64 value);
|
|
|
|
/* @} *//* Write endian functions */
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#include <SDL3/SDL_close_code.h>
|
|
|
|
#endif /* SDL_rwops_h_ */
|