Atlas - SDL_sysfilesystem.cpp
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[FILE BEGIN]
1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
4
5  This software is provided 'as-is', without any express or implied
6  warranty.  In no event will the authors be held liable for any damages
7  arising from the use of this software.
8
9  Permission is granted to anyone to use this software for any purpose,
10  including commercial applications, and to alter it and redistribute it
11  freely, subject to the following restrictions:
12
13  1. The origin of this software must not be misrepresented; you must not
14     claim that you wrote the original software. If you use this software
15     in a product, an acknowledgment in the product documentation would be
16     appreciated but is not required.
17  2. Altered source versions must be plainly marked as such, and must not be
18     misrepresented as being the original software.
19  3. This notice may not be removed or altered from any source distribution.
20*/
21#include "SDL_internal.h"
22
23/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
24// System dependent filesystem routines
25
26extern "C" {
27#include "../SDL_sysfilesystem.h"
28}
29
30#include "../../core/windows/SDL_windows.h"
31#include <SDL3/SDL_hints.h>
32#include <SDL3/SDL_system.h>
33#include <SDL3/SDL_filesystem.h>
34#include <XGameSaveFiles.h>
35
36char *
37SDL_SYS_GetBasePath(void)
38{
39    /* NOTE: This function is a UTF8 version of the Win32 SDL_GetBasePath()!
40     * The GDK actually _recommends_ the 'A' functions over the 'W' functions :o
41     */
42    DWORD buflen = 128;
43    CHAR *path = NULL;
44    DWORD len = 0;
45    int i;
46
47    while (true) {
48        void *ptr = SDL_realloc(path, buflen * sizeof(CHAR));
49        if (!ptr) {
50            SDL_free(path);
51            return NULL;
52        }
53
54        path = (CHAR *)ptr;
55
56        len = GetModuleFileNameA(NULL, path, buflen);
57        // if it truncated, then len >= buflen - 1
58        // if there was enough room (or failure), len < buflen - 1
59        if (len < buflen - 1) {
60            break;
61        }
62
63        // buffer too small? Try again.
64        buflen *= 2;
65    }
66
67    if (len == 0) {
68        SDL_free(path);
69        WIN_SetError("Couldn't locate our .exe");
70        return NULL;
71    }
72
73    for (i = len - 1; i > 0; i--) {
74        if (path[i] == '\\') {
75            break;
76        }
77    }
78
79    SDL_assert(i > 0);  // Should have been an absolute path.
80    path[i + 1] = '\0'; // chop off filename.
81
82    return path;
83}
84
85char *SDL_SYS_GetPrefPath(const char *org, const char *app)
86{
87    XUserHandle user = NULL;
88    XAsyncBlock block = { 0 };
89    char *folderPath;
90    HRESULT result;
91    const char *csid = SDL_GetHint("SDL_GDK_SERVICE_CONFIGURATION_ID");
92
93    // This should be set before calling SDL_GetPrefPath!
94    if (!csid) {
95        SDL_LogWarn(SDL_LOG_CATEGORY_SYSTEM, "Set SDL_GDK_SERVICE_CONFIGURATION_ID before calling SDL_GetPrefPath!");
96        return SDL_strdup("T:\\");
97    }
98
99    if (!SDL_GetGDKDefaultUser(&user)) {
100        // Error already set, just return
101        return NULL;
102    }
103
104    if (FAILED(result = XGameSaveFilesGetFolderWithUiAsync(user, csid, &block))) {
105        WIN_SetErrorFromHRESULT("XGameSaveFilesGetFolderWithUiAsync", result);
106        return NULL;
107    }
108
109    folderPath = (char *)SDL_malloc(MAX_PATH);
110    do {
111        result = XGameSaveFilesGetFolderWithUiResult(&block, MAX_PATH, folderPath);
112    } while (result == E_PENDING);
113    if (FAILED(result)) {
114        WIN_SetErrorFromHRESULT("XGameSaveFilesGetFolderWithUiResult", result);
115        SDL_free(folderPath);
116        return NULL;
117    }
118
119    /* We aren't using 'app' here because the container rules are a lot more
120     * strict than the NTFS rules, so it will most likely be invalid :(
121     */
122    SDL_strlcat(folderPath, "\\SDLPrefPath\\", MAX_PATH);
123    if (CreateDirectoryA(folderPath, NULL) == FALSE) {
124        if (GetLastError() != ERROR_ALREADY_EXISTS) {
125            WIN_SetError("CreateDirectoryA");
126            SDL_free(folderPath);
127            return NULL;
128        }
129    }
130    return folderPath;
131}
132
133// TODO
134char *SDL_SYS_GetUserFolder(SDL_Folder folder)
135{
136    SDL_Unsupported();
137    return NULL;
138}
139
140char *SDL_SYS_GetCurrentDirectory(void)
141{
142    const char *base = SDL_GetBasePath();
143    if (!base) {
144        return NULL;
145    }
146
147    return SDL_strdup(base);
148}
149
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