Atlas - SDL_sysfilesystem.cpp
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1/*
2  Simple DirectMedia Layer
3  Copyright (C) 1997-2018 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/* TODO, WinRT: remove the need to compile this with C++/CX (/ZW) extensions, and if possible, without C++ at all
24*/
25
26#ifdef __WINRT__
27
28extern "C" {
29#include "SDL_filesystem.h"
30#include "SDL_error.h"
31#include "SDL_hints.h"
32#include "SDL_stdinc.h"
33#include "SDL_system.h"
34#include "../../core/windows/SDL_windows.h"
35}
36
37#include <string>
38#include <unordered_map>
39
40using namespace std;
41using namespace Windows::Storage;
42
43extern "C" const wchar_t *
44SDL_WinRTGetFSPathUNICODE(SDL_WinRT_Path pathType)
45{
46    switch (pathType) {
47        case SDL_WINRT_PATH_INSTALLED_LOCATION:
48        {
49            static wstring path;
50            if (path.empty()) {
51                path = Windows::ApplicationModel::Package::Current->InstalledLocation->Path->Data();
52            }
53            return path.c_str();
54        }
55
56        case SDL_WINRT_PATH_LOCAL_FOLDER:
57        {
58            static wstring path;
59            if (path.empty()) {
60                path = ApplicationData::Current->LocalFolder->Path->Data();
61            }
62            return path.c_str();
63        }
64
65#if (WINAPI_FAMILY != WINAPI_FAMILY_PHONE_APP) || (NTDDI_VERSION > NTDDI_WIN8)
66        case SDL_WINRT_PATH_ROAMING_FOLDER:
67        {
68            static wstring path;
69            if (path.empty()) {
70                path = ApplicationData::Current->RoamingFolder->Path->Data();
71            }
72            return path.c_str();
73        }
74
75        case SDL_WINRT_PATH_TEMP_FOLDER:
76        {
77            static wstring path;
78            if (path.empty()) {
79                path = ApplicationData::Current->TemporaryFolder->Path->Data();
80            }
81            return path.c_str();
82        }
83#endif
84
85        default:
86            break;
87    }
88
89    SDL_Unsupported();
90    return NULL;
91}
92
93extern "C" const char *
94SDL_WinRTGetFSPathUTF8(SDL_WinRT_Path pathType)
95{
96    typedef unordered_map<SDL_WinRT_Path, string> UTF8PathMap;
97    static UTF8PathMap utf8Paths;
98
99    UTF8PathMap::iterator searchResult = utf8Paths.find(pathType);
100    if (searchResult != utf8Paths.end()) {
101        return searchResult->second.c_str();
102    }
103
104    const wchar_t * ucs2Path = SDL_WinRTGetFSPathUNICODE(pathType);
105    if (!ucs2Path) {
106        return NULL;
107    }
108
109    char * utf8Path = WIN_StringToUTF8(ucs2Path);
110    utf8Paths[pathType] = utf8Path;
111    SDL_free(utf8Path);
112    return utf8Paths[pathType].c_str();
113}
114
115extern "C" char *
116SDL_GetBasePath(void)
117{
118    const char * srcPath = SDL_WinRTGetFSPathUTF8(SDL_WINRT_PATH_INSTALLED_LOCATION);
119    size_t destPathLen;
120    char * destPath = NULL;
121
122    if (!srcPath) {
123        SDL_SetError("Couldn't locate our basepath: %s", SDL_GetError());
124        return NULL;
125    }
126
127    destPathLen = SDL_strlen(srcPath) + 2;
128    destPath = (char *) SDL_malloc(destPathLen);
129    if (!destPath) {
130        SDL_OutOfMemory();
131        return NULL;
132    }
133
134    SDL_snprintf(destPath, destPathLen, "%s\\", srcPath);
135    return destPath;
136}
137
138extern "C" char *
139SDL_GetPrefPath(const char *org, const char *app)
140{
141    /* WinRT note: The 'SHGetFolderPath' API that is used in Windows 7 and
142     * earlier is not available on WinRT or Windows Phone.  WinRT provides
143     * a similar API, but SHGetFolderPath can't be called, at least not
144     * without violating Microsoft's app-store requirements.
145     */
146
147    const WCHAR * srcPath = NULL;
148    WCHAR path[MAX_PATH];
149    char *retval = NULL;
150    WCHAR* worg = NULL;
151    WCHAR* wapp = NULL;
152    size_t new_wpath_len = 0;
153    BOOL api_result = FALSE;
154
155    if (!app) {
156        SDL_InvalidParamError("app");
157        return NULL;
158    }
159    if (!org) {
160        org = "";
161    }
162
163    srcPath = SDL_WinRTGetFSPathUNICODE(SDL_WINRT_PATH_LOCAL_FOLDER);
164    if ( ! srcPath) {
165        SDL_SetError("Unable to find a source path");
166        return NULL;
167    }
168
169    if (SDL_wcslen(srcPath) >= MAX_PATH) {
170        SDL_SetError("Path too long.");
171        return NULL;
172    }
173    SDL_wcslcpy(path, srcPath, SDL_arraysize(path));
174
175    worg = WIN_UTF8ToString(org);
176    if (worg == NULL) {
177        SDL_OutOfMemory();
178        return NULL;
179    }
180
181    wapp = WIN_UTF8ToString(app);
182    if (wapp == NULL) {
183        SDL_free(worg);
184        SDL_OutOfMemory();
185        return NULL;
186    }
187
188    new_wpath_len = SDL_wcslen(worg) + SDL_wcslen(wapp) + SDL_wcslen(path) + 3;
189
190    if ((new_wpath_len + 1) > MAX_PATH) {
191        SDL_free(worg);
192        SDL_free(wapp);
193        SDL_SetError("Path too long.");
194        return NULL;
195    }
196
197    if (*worg) {
198        SDL_wcslcat(path, L"\\", new_wpath_len + 1);
199        SDL_wcslcat(path, worg, new_wpath_len + 1);
200        SDL_free(worg);
201    }
202
203    api_result = CreateDirectoryW(path, NULL);
204    if (api_result == FALSE) {
205        if (GetLastError() != ERROR_ALREADY_EXISTS) {
206            SDL_free(wapp);
207            WIN_SetError("Couldn't create a prefpath.");
208            return NULL;
209        }
210    }
211
212    SDL_wcslcat(path, L"\\", new_wpath_len + 1);
213    SDL_wcslcat(path, wapp, new_wpath_len + 1);
214    SDL_free(wapp);
215
216    api_result = CreateDirectoryW(path, NULL);
217    if (api_result == FALSE) {
218        if (GetLastError() != ERROR_ALREADY_EXISTS) {
219            WIN_SetError("Couldn't create a prefpath.");
220            return NULL;
221        }
222    }
223
224    SDL_wcslcat(path, L"\\", new_wpath_len + 1);
225
226    retval = WIN_StringToUTF8(path);
227
228    return retval;
229}
230
231#endif /* __WINRT__ */
232
233/* vi: set ts=4 sw=4 expandtab: */
234
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