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Diffstat (limited to 'Client/ThirdParty/SDL2/SDL_rwops.h')
| -rw-r--r-- | Client/ThirdParty/SDL2/SDL_rwops.h | 412 |
1 files changed, 412 insertions, 0 deletions
diff --git a/Client/ThirdParty/SDL2/SDL_rwops.h b/Client/ThirdParty/SDL2/SDL_rwops.h new file mode 100644 index 0000000..52b3a6c --- /dev/null +++ b/Client/ThirdParty/SDL2/SDL_rwops.h @@ -0,0 +1,412 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2021 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. + */ +/* @{ */ + +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 +extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromFP(void * fp, + SDL_bool autoclose); +#endif + +extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromMem(void *mem, int size); +extern DECLSPEC SDL_RWops *SDLCALL SDL_RWFromConstMem(const void *mem, + int size); + +/* @} *//* RWFrom functions */ + + +extern DECLSPEC SDL_RWops *SDLCALL SDL_AllocRW(void); +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 macro to get the size of the data stream in an SDL_RWops. + * + * \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 2.0.0. + */ +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. + * + * \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. + * + * \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. + * + * \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. + * + * \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. + * + * \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. + * + * \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. + * + * \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. + * + * \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. + * + * SDL_RWclose() is actually a macro that calls the SDL_RWops's `close` method + * appropriately, to simplify application development. + * + * \param context SDL_RWops structure to close + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \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. + */ +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(). + * + * \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. + */ +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. + */ +/* @{ */ +extern DECLSPEC Uint8 SDLCALL SDL_ReadU8(SDL_RWops * src); +extern DECLSPEC Uint16 SDLCALL SDL_ReadLE16(SDL_RWops * src); +extern DECLSPEC Uint16 SDLCALL SDL_ReadBE16(SDL_RWops * src); +extern DECLSPEC Uint32 SDLCALL SDL_ReadLE32(SDL_RWops * src); +extern DECLSPEC Uint32 SDLCALL SDL_ReadBE32(SDL_RWops * src); +extern DECLSPEC Uint64 SDLCALL SDL_ReadLE64(SDL_RWops * src); +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. + */ +/* @{ */ +extern DECLSPEC size_t SDLCALL SDL_WriteU8(SDL_RWops * dst, Uint8 value); +extern DECLSPEC size_t SDLCALL SDL_WriteLE16(SDL_RWops * dst, Uint16 value); +extern DECLSPEC size_t SDLCALL SDL_WriteBE16(SDL_RWops * dst, Uint16 value); +extern DECLSPEC size_t SDLCALL SDL_WriteLE32(SDL_RWops * dst, Uint32 value); +extern DECLSPEC size_t SDLCALL SDL_WriteBE32(SDL_RWops * dst, Uint32 value); +extern DECLSPEC size_t SDLCALL SDL_WriteLE64(SDL_RWops * dst, Uint64 value); +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: */ |