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/*
Simple DirectMedia Layer
Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "SDL_internal.h"
#include "../SDL_sysstorage.h"
// !!! FIXME: Async API can use SteamRemoteStorage_ReadFileAsync
// !!! FIXME: Async API can use SteamRemoteStorage_WriteFileAsync
#define STEAM_PROC(ret, func, parms) \
typedef ret (*steamfntype_##func) parms;
#include "SDL_steamstorage_proc.h"
typedef struct STEAM_RemoteStorage
{
SDL_SharedObject *libsteam_api;
#define STEAM_PROC(ret, func, parms) \
steamfntype_##func func;
#include "SDL_steamstorage_proc.h"
} STEAM_RemoteStorage;
static bool STEAM_CloseStorage(void *userdata)
{
bool result = true;
STEAM_RemoteStorage *steam = (STEAM_RemoteStorage*) userdata;
void *steamremotestorage = steam->SteamAPI_SteamRemoteStorage_v016();
if (steamremotestorage == NULL) {
result = SDL_SetError("SteamRemoteStorage unavailable");
} else if (!steam->SteamAPI_ISteamRemoteStorage_EndFileWriteBatch(steamremotestorage)) {
result = SDL_SetError("SteamRemoteStorage()->EndFileWriteBatch() failed");
}
SDL_UnloadObject(steam->libsteam_api);
SDL_free(steam);
return result;
}
static bool STEAM_StorageReady(void *userdata)
{
return true;
}
static bool STEAM_GetStoragePathInfo(void *userdata, const char *path, SDL_PathInfo *info)
{
STEAM_RemoteStorage *steam = (STEAM_RemoteStorage*) userdata;
void *steamremotestorage = steam->SteamAPI_SteamRemoteStorage_v016();
if (steamremotestorage == NULL) {
return SDL_SetError("SteamRemoteStorage unavailable");
}
if (info) {
SDL_zerop(info);
info->type = SDL_PATHTYPE_FILE;
info->size = steam->SteamAPI_ISteamRemoteStorage_GetFileSize(steamremotestorage, path);
}
return true;
}
static bool STEAM_ReadStorageFile(void *userdata, const char *path, void *destination, Uint64 length)
{
bool result = false;
STEAM_RemoteStorage *steam = (STEAM_RemoteStorage*) userdata;
void *steamremotestorage = steam->SteamAPI_SteamRemoteStorage_v016();
if (steamremotestorage == NULL) {
return SDL_SetError("SteamRemoteStorage unavailable");
}
if (length > SDL_MAX_SINT32) {
return SDL_SetError("SteamRemoteStorage only supports INT32_MAX read size");
}
if (steam->SteamAPI_ISteamRemoteStorage_FileRead(steamremotestorage, path, destination, (Sint32) length) == length) {
result = true;
} else {
SDL_SetError("SteamAPI_ISteamRemoteStorage_FileRead() failed");
}
return result;
}
static bool STEAM_WriteStorageFile(void *userdata, const char *path, const void *source, Uint64 length)
{
bool result = false;
STEAM_RemoteStorage *steam = (STEAM_RemoteStorage*) userdata;
void *steamremotestorage = steam->SteamAPI_SteamRemoteStorage_v016();
if (steamremotestorage == NULL) {
return SDL_SetError("SteamRemoteStorage unavailable");
}
if (length > SDL_MAX_SINT32) {
return SDL_SetError("SteamRemoteStorage only supports INT32_MAX write size");
}
if (steam->SteamAPI_ISteamRemoteStorage_FileWrite(steamremotestorage, path, source, (Sint32) length) == length) {
result = true;
} else {
SDL_SetError("SteamAPI_ISteamRemoteStorage_FileRead() failed");
}
return result;
}
static Uint64 STEAM_GetStorageSpaceRemaining(void *userdata)
{
Uint64 total, remaining;
STEAM_RemoteStorage *steam = (STEAM_RemoteStorage*) userdata;
void *steamremotestorage = steam->SteamAPI_SteamRemoteStorage_v016();
if (steamremotestorage == NULL) {
SDL_SetError("SteamRemoteStorage unavailable");
return 0;
}
if (!steam->SteamAPI_ISteamRemoteStorage_GetQuota(steamremotestorage, &total, &remaining)) {
SDL_SetError("SteamRemoteStorage()->GetQuota failed");
return 0;
}
return remaining;
}
static const SDL_StorageInterface STEAM_user_iface = {
sizeof(SDL_StorageInterface),
STEAM_CloseStorage,
STEAM_StorageReady,
NULL, // enumerate
STEAM_GetStoragePathInfo,
STEAM_ReadStorageFile,
STEAM_WriteStorageFile,
NULL, // mkdir
NULL, // remove
NULL, // rename
NULL, // copy
STEAM_GetStorageSpaceRemaining
};
static SDL_Storage *STEAM_User_Create(const char *org, const char *app, SDL_PropertiesID props)
{
SDL_Storage *result;
STEAM_RemoteStorage *steam;
void *steamremotestorage;
steam = (STEAM_RemoteStorage*) SDL_malloc(sizeof(STEAM_RemoteStorage));
if (steam == NULL) {
return NULL;
}
steam->libsteam_api = SDL_LoadObject(
#if defined(_WIN64)
"steam_api64.dll"
#elif defined(_WIN32)
"steam_api.dll"
#elif defined(__APPLE__)
"libsteam_api.dylib"
#else
"libsteam_api.so"
#endif
);
if (steam->libsteam_api == NULL) {
SDL_free(steam);
return NULL;
}
#define STEAM_PROC(ret, func, parms) \
steam->func = (steamfntype_##func) SDL_LoadFunction(steam->libsteam_api, #func); \
if (steam->func == NULL) { \
SDL_SetError("Could not load function " #func); \
goto steamfail; \
}
#include "SDL_steamstorage_proc.h"
steamremotestorage = steam->SteamAPI_SteamRemoteStorage_v016();
if (steamremotestorage == NULL) {
SDL_SetError("SteamRemoteStorage unavailable");
goto steamfail;
}
if (!steam->SteamAPI_ISteamRemoteStorage_IsCloudEnabledForAccount(steamremotestorage)) {
SDL_SetError("Steam cloud is disabled for this user");
goto steamfail;
}
if (!steam->SteamAPI_ISteamRemoteStorage_IsCloudEnabledForApp(steamremotestorage)) {
SDL_SetError("Steam cloud is disabled for this application");
goto steamfail;
}
if (!steam->SteamAPI_ISteamRemoteStorage_BeginFileWriteBatch(steamremotestorage)) {
SDL_SetError("SteamRemoteStorage()->BeginFileWriteBatch failed");
goto steamfail;
}
result = SDL_OpenStorage(&STEAM_user_iface, steam);
if (result == NULL) {
goto steamfail;
}
return result;
steamfail:
SDL_UnloadObject(steam->libsteam_api);
SDL_free(steam);
return NULL;
}
UserStorageBootStrap STEAM_userbootstrap = {
"steam",
"SDL Steam user storage driver",
STEAM_User_Create
};
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