379 lines
13 KiB
C
379 lines
13 KiB
C
/*
|
|
Simple DirectMedia Layer
|
|
Copyright (C) 1997-2024 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_storage.h
|
|
*
|
|
* Include file for storage container SDL API functions
|
|
*/
|
|
|
|
#ifndef SDL_storage_h_
|
|
#define SDL_storage_h_
|
|
|
|
#include <SDL3/SDL_stdinc.h>
|
|
#include <SDL3/SDL_filesystem.h>
|
|
#include <SDL3/SDL_properties.h>
|
|
|
|
#include <SDL3/SDL_begin_code.h>
|
|
|
|
/* Set up for C function definitions, even when using C++ */
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* !!! FIXME: Don't let this ship without async R/W support!!! */
|
|
|
|
typedef struct SDL_StorageInterface
|
|
{
|
|
/* Called when the storage is closed */
|
|
int (SDLCALL *close)(void *userdata);
|
|
|
|
/* Optional, returns whether the storage is currently ready for access */
|
|
SDL_bool (SDLCALL *ready)(void *userdata);
|
|
|
|
/* Enumerate a directory, optional for write-only storage */
|
|
int (SDLCALL *enumerate)(void *userdata, const char *path, SDL_EnumerateDirectoryCallback callback, void *callback_userdata);
|
|
|
|
/* Get path information, optional for write-only storage */
|
|
int (SDLCALL *info)(void *userdata, const char *path, SDL_PathInfo *info);
|
|
|
|
/* Read a file from storage, optional for write-only storage */
|
|
int (SDLCALL *read_file)(void *userdata, const char *path, void *destination, Uint64 length);
|
|
|
|
/* Write a file to storage, optional for read-only storage */
|
|
int (SDLCALL *write_file)(void *userdata, const char *path, const void *source, Uint64 length);
|
|
|
|
/* Create a directory, optional for read-only storage */
|
|
int (SDLCALL *mkdir)(void *userdata, const char *path);
|
|
|
|
/* Remove a file or empty directory, optional for read-only storage */
|
|
int (SDLCALL *remove)(void *userdata, const char *path);
|
|
|
|
/* Rename a path, optional for read-only storage */
|
|
int (SDLCALL *rename)(void *userdata, const char *oldpath, const char *newpath);
|
|
|
|
/* Get the space remaining, optional for read-only storage */
|
|
Uint64 (SDLCALL *space_remaining)(void *userdata);
|
|
|
|
} SDL_StorageInterface;
|
|
|
|
typedef struct SDL_Storage SDL_Storage;
|
|
|
|
/**
|
|
* Opens up a read-only container for the application's filesystem.
|
|
*
|
|
* \param override a path to override the backend's default title root
|
|
* \param props a property list that may contain backend-specific information
|
|
* \returns a title storage container on success or NULL on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_OpenUserStorage
|
|
* \sa SDL_OpenStorage
|
|
* \sa SDL_TitleStorageReady
|
|
* \sa SDL_CloseStorage
|
|
* \sa SDL_StorageReady
|
|
* \sa SDL_GetStorageFileSize
|
|
* \sa SDL_ReadStorageFile
|
|
* \sa SDL_WriteStorageFile
|
|
* \sa SDL_GetStorageSpaceRemaining
|
|
*/
|
|
extern DECLSPEC SDL_Storage *SDLCALL SDL_OpenTitleStorage(const char *override, SDL_PropertiesID props);
|
|
|
|
/**
|
|
* Opens up a container for a user's unique read/write filesystem.
|
|
*
|
|
* While title storage can generally be kept open throughout runtime, user
|
|
* storage should only be opened when the client is ready to read/write files.
|
|
* This allows the backend to properly batch file operations and flush them when
|
|
* the container has been closed; ensuring safe and optimal save I/O.
|
|
*
|
|
* \param org the name of your organization
|
|
* \param app the name of your application
|
|
* \param props a property list that may contain backend-specific information
|
|
* \returns a user storage container on success or NULL on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_OpenTitleStorage
|
|
* \sa SDL_OpenStorage
|
|
* \sa SDL_CloseStorage
|
|
* \sa SDL_StorageReady
|
|
* \sa SDL_GetStorageFileSize
|
|
* \sa SDL_ReadStorageFile
|
|
* \sa SDL_WriteStorageFile
|
|
* \sa SDL_GetStorageSpaceRemaining
|
|
*/
|
|
extern DECLSPEC SDL_Storage *SDLCALL SDL_OpenUserStorage(const char *org, const char *app, SDL_PropertiesID props);
|
|
|
|
/**
|
|
* Opens up a container for local filesystem storage.
|
|
*
|
|
* This is provided for development and tools. Portable applications should use SDL_OpenTitleStorage() for access to game data and SDL_OpenUserStorage() for access to user data.
|
|
*
|
|
* \param path the base path prepended to all storage paths, or NULL for no base path
|
|
* \returns a filesystem storage container on success or NULL on failure; call SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_OpenStorage
|
|
* \sa SDL_CloseStorage
|
|
* \sa SDL_StorageReady
|
|
* \sa SDL_GetStorageFileSize
|
|
* \sa SDL_ReadStorageFile
|
|
* \sa SDL_WriteStorageFile
|
|
* \sa SDL_GetStorageSpaceRemaining
|
|
*/
|
|
extern DECLSPEC SDL_Storage *SDLCALL SDL_OpenFileStorage(const char *path);
|
|
|
|
/**
|
|
* Opens up a container using a client-provided storage interface.
|
|
*
|
|
* Applications do not need to use this function unless they are providing
|
|
* their own SDL_Storage implementation. If you just need an SDL_Storage, you
|
|
* should use the built-in implementations in SDL, like SDL_OpenTitleStorage()
|
|
* or SDL_OpenUserStorage().
|
|
*
|
|
* \param iface the function table to be used by this container
|
|
* \param userdata the pointer that will be passed to the store interface
|
|
* \returns a storage container on success or NULL on failure; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_OpenTitleStorage
|
|
* \sa SDL_OpenUserStorage
|
|
* \sa SDL_CloseStorage
|
|
* \sa SDL_StorageReady
|
|
* \sa SDL_GetStorageFileSize
|
|
* \sa SDL_ReadStorageFile
|
|
* \sa SDL_WriteStorageFile
|
|
* \sa SDL_GetStorageSpaceRemaining
|
|
*/
|
|
extern DECLSPEC SDL_Storage *SDLCALL SDL_OpenStorage(const SDL_StorageInterface *iface, void *userdata);
|
|
|
|
/**
|
|
* Closes and frees a storage container.
|
|
*
|
|
* \param storage a storage container to close
|
|
* \returns 0 if the container was freed with no errors, a negative value
|
|
* otherwise; call SDL_GetError() for more information. Even if the
|
|
* function returns an error, the container data will be freed; the
|
|
* error is only for informational purposes.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_OpenTitleStorage
|
|
* \sa SDL_OpenUserStorage
|
|
* \sa SDL_OpenStorage
|
|
* \sa SDL_StorageReady
|
|
* \sa SDL_GetStorageFileSize
|
|
* \sa SDL_ReadStorageFile
|
|
* \sa SDL_WriteStorageFile
|
|
* \sa SDL_GetStorageSpaceRemaining
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_CloseStorage(SDL_Storage *storage);
|
|
|
|
/**
|
|
* Checks if the storage container is ready to use.
|
|
*
|
|
* This function should be called in regular intervals until it returns
|
|
* SDL_TRUE - however, it is not recommended to spinwait on this call, as the
|
|
* backend may depend on a synchronous message loop.
|
|
*
|
|
* \param storage a storage container to query
|
|
* \returns SDL_TRUE if the container is ready, SDL_FALSE otherwise
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_OpenTitleStorage
|
|
* \sa SDL_OpenUserStorage
|
|
* \sa SDL_OpenStorage
|
|
* \sa SDL_CloseStorage
|
|
* \sa SDL_GetStorageFileSize
|
|
* \sa SDL_ReadStorageFile
|
|
* \sa SDL_WriteStorageFile
|
|
* \sa SDL_GetStorageSpaceRemaining
|
|
*/
|
|
extern DECLSPEC SDL_bool SDLCALL SDL_StorageReady(SDL_Storage *storage);
|
|
|
|
/**
|
|
* Query the size of a file within a storage container.
|
|
*
|
|
* \param storage a storage container to query
|
|
* \param path the relative path of the file to query
|
|
* \param length a pointer to be filled with the file's length
|
|
* \returns 0 if the file could be queried, a negative value otherwise; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_OpenTitleStorage
|
|
* \sa SDL_OpenUserStorage
|
|
* \sa SDL_OpenStorage
|
|
* \sa SDL_CloseStorage
|
|
* \sa SDL_StorageReady
|
|
* \sa SDL_ReadStorageFile
|
|
* \sa SDL_WriteStorageFile
|
|
* \sa SDL_GetStorageSpaceRemaining
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetStorageFileSize(SDL_Storage *storage, const char *path, Uint64 *length);
|
|
|
|
/**
|
|
* Synchronously read a file from a storage container into a client-provided
|
|
* buffer.
|
|
*
|
|
* \param storage a storage container to read from
|
|
* \param path the relative path of the file to read
|
|
* \param destination a client-provided buffer to read the file into
|
|
* \param length the length of the destination buffer
|
|
* \returns 0 if the file was read, a negative value otherwise; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_OpenTitleStorage
|
|
* \sa SDL_OpenUserStorage
|
|
* \sa SDL_OpenStorage
|
|
* \sa SDL_CloseStorage
|
|
* \sa SDL_StorageReady
|
|
* \sa SDL_GetStorageFileSize
|
|
* \sa SDL_WriteStorageFile
|
|
* \sa SDL_GetStorageSpaceRemaining
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_ReadStorageFile(SDL_Storage *storage, const char *path, void *destination, Uint64 length);
|
|
|
|
/**
|
|
* Synchronously write a file from client memory into a storage container.
|
|
*
|
|
* \param storage a storage container to write to
|
|
* \param path the relative path of the file to write
|
|
* \param source a client-provided buffer to write from
|
|
* \param length the length of the source buffer
|
|
* \returns 0 if the file was written, a negative value otherwise; call
|
|
* SDL_GetError() for more information.
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_OpenTitleStorage
|
|
* \sa SDL_OpenUserStorage
|
|
* \sa SDL_OpenStorage
|
|
* \sa SDL_CloseStorage
|
|
* \sa SDL_StorageReady
|
|
* \sa SDL_GetStorageFileSize
|
|
* \sa SDL_ReadStorageFile
|
|
* \sa SDL_GetStorageSpaceRemaining
|
|
*/
|
|
extern DECLSPEC int SDL_WriteStorageFile(SDL_Storage *storage, const char *path, const void *source, Uint64 length);
|
|
|
|
/**
|
|
* Create a directory in a writable storage container.
|
|
*
|
|
* \param storage a storage container
|
|
* \param path the path of the directory to create
|
|
* \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.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_CreateStorageDirectory(SDL_Storage *storage, const char *path);
|
|
|
|
/**
|
|
* Enumerate a directory in a storage container.
|
|
*
|
|
* \param storage a storage container
|
|
* \param path the path of the directory to enumerate
|
|
* \param callback a function that is called for each entry in the directory
|
|
* \param userdata a pointer that is passed to `callback`
|
|
* \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.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_EnumerateStorageDirectory(SDL_Storage *storage, const char *path, SDL_EnumerateDirectoryCallback callback, void *userdata);
|
|
|
|
/**
|
|
* Remove a file or an empty directory in a writable storage container.
|
|
*
|
|
* \param storage a storage container
|
|
* \param path the path of the directory to enumerate
|
|
* \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.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_RemoveStoragePath(SDL_Storage *storage, const char *path);
|
|
|
|
/**
|
|
* Rename a file or directory in a writable storage container.
|
|
*
|
|
* \param storage a storage container
|
|
* \param oldpath the old path
|
|
* \param newpath the new path
|
|
* \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.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_RenameStoragePath(SDL_Storage *storage, const char *oldpath, const char *newpath);
|
|
|
|
/**
|
|
* Get information about a filesystem path in a storage container.
|
|
*
|
|
* \param storage a storage container
|
|
* \param path the path to query
|
|
* \param info a pointer filled in with information about the path
|
|
* \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.
|
|
*/
|
|
extern DECLSPEC int SDLCALL SDL_GetStoragePathInfo(SDL_Storage *storage, const char *path, SDL_PathInfo *info);
|
|
|
|
/**
|
|
* Queries the remaining space in a storage container.
|
|
*
|
|
* \param storage a storage container to query
|
|
* \returns the amount of remaining space, in bytes
|
|
*
|
|
* \since This function is available since SDL 3.0.0.
|
|
*
|
|
* \sa SDL_OpenTitleStorage
|
|
* \sa SDL_OpenUserStorage
|
|
* \sa SDL_OpenStorage
|
|
* \sa SDL_CloseStorage
|
|
* \sa SDL_StorageReady
|
|
* \sa SDL_GetStorageFileSize
|
|
* \sa SDL_ReadStorageFile
|
|
* \sa SDL_WriteStorageFile
|
|
*/
|
|
extern DECLSPEC Uint64 SDLCALL SDL_GetStorageSpaceRemaining(SDL_Storage *storage);
|
|
|
|
/* Ends C function definitions when using C++ */
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#include <SDL3/SDL_close_code.h>
|
|
|
|
#endif /* SDL_storage_h_ */
|