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This commit is contained in:
Nitload
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/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_internal.h"
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#if defined(SDL_FSOPS_WINDOWS)
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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// System dependent filesystem routines
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#include "../../core/windows/SDL_windows.h"
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#include "../SDL_sysfilesystem.h"
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bool SDL_SYS_EnumerateDirectory(const char *path, SDL_EnumerateDirectoryCallback cb, void *userdata)
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{
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SDL_EnumerationResult result = SDL_ENUM_CONTINUE;
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if (*path == '\0') { // if empty (completely at the root), we need to enumerate drive letters.
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const DWORD drives = GetLogicalDrives();
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char name[] = { 0, ':', '\\', '\0' };
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for (int i = 'A'; (result == SDL_ENUM_CONTINUE) && (i <= 'Z'); i++) {
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if (drives & (1 << (i - 'A'))) {
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name[0] = (char) i;
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result = cb(userdata, "", name);
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}
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}
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} else {
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// you need a wildcard to enumerate through FindFirstFileEx(), but the wildcard is only checked in the
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// filename element at the end of the path string, so always tack on a "\\*" to get everything, and
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// also prevent any wildcards inserted by the app from being respected.
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char *pattern = NULL;
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int patternlen = SDL_asprintf(&pattern, "%s\\\\", path); // we'll replace that second '\\' in the trimdown.
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if ((patternlen == -1) || (!pattern)) {
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return false;
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}
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// trim down to a single path separator at the end, in case the caller added one or more.
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patternlen--;
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while ((patternlen >= 0) && ((pattern[patternlen] == '\\') || (pattern[patternlen] == '/'))) {
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pattern[patternlen--] ='\0';
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}
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pattern[++patternlen] = '\\';
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pattern[++patternlen] = '*';
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pattern[++patternlen] = '\0';
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WCHAR *wpattern = WIN_UTF8ToStringW(pattern);
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if (!wpattern) {
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SDL_free(pattern);
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return false;
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}
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pattern[--patternlen] = '\0'; // chop off the '*' so we just have the dirname with a path separator.
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WIN32_FIND_DATAW entw;
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HANDLE dir = FindFirstFileExW(wpattern, FindExInfoStandard, &entw, FindExSearchNameMatch, NULL, 0);
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SDL_free(wpattern);
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if (dir == INVALID_HANDLE_VALUE) {
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SDL_free(pattern);
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return WIN_SetError("Failed to enumerate directory");
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}
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do {
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const WCHAR *fn = entw.cFileName;
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if (fn[0] == '.') { // ignore "." and ".."
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if ((fn[1] == '\0') || ((fn[1] == '.') && (fn[2] == '\0'))) {
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continue;
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}
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}
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char *utf8fn = WIN_StringToUTF8W(fn);
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if (!utf8fn) {
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result = SDL_ENUM_FAILURE;
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} else {
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result = cb(userdata, pattern, utf8fn);
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SDL_free(utf8fn);
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}
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} while ((result == SDL_ENUM_CONTINUE) && (FindNextFileW(dir, &entw) != 0));
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FindClose(dir);
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SDL_free(pattern);
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}
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return (result != SDL_ENUM_FAILURE);
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}
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bool SDL_SYS_RemovePath(const char *path)
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{
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WCHAR *wpath = WIN_UTF8ToStringW(path);
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if (!wpath) {
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return false;
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}
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WIN32_FILE_ATTRIBUTE_DATA info;
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if (!GetFileAttributesExW(wpath, GetFileExInfoStandard, &info)) {
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SDL_free(wpath);
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if (GetLastError() == ERROR_FILE_NOT_FOUND) {
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// Note that ERROR_PATH_NOT_FOUND means a parent dir is missing, and we consider that an error.
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return true; // thing is already gone, call it a success.
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}
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return WIN_SetError("Couldn't get path's attributes");
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}
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const int isdir = (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
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const BOOL rc = isdir ? RemoveDirectoryW(wpath) : DeleteFileW(wpath);
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SDL_free(wpath);
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if (!rc) {
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return WIN_SetError("Couldn't remove path");
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}
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return true;
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}
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bool SDL_SYS_RenamePath(const char *oldpath, const char *newpath)
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{
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WCHAR *woldpath = WIN_UTF8ToStringW(oldpath);
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if (!woldpath) {
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return false;
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}
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WCHAR *wnewpath = WIN_UTF8ToStringW(newpath);
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if (!wnewpath) {
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SDL_free(woldpath);
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return false;
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}
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const BOOL rc = MoveFileExW(woldpath, wnewpath, MOVEFILE_REPLACE_EXISTING);
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SDL_free(wnewpath);
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SDL_free(woldpath);
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if (!rc) {
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return WIN_SetError("Couldn't rename path");
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}
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return true;
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}
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bool SDL_SYS_CopyFile(const char *oldpath, const char *newpath)
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{
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WCHAR *woldpath = WIN_UTF8ToStringW(oldpath);
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if (!woldpath) {
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return false;
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}
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WCHAR *wnewpath = WIN_UTF8ToStringW(newpath);
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if (!wnewpath) {
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SDL_free(woldpath);
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return false;
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}
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const BOOL rc = CopyFileExW(woldpath, wnewpath, NULL, NULL, NULL, COPY_FILE_ALLOW_DECRYPTED_DESTINATION|COPY_FILE_NO_BUFFERING);
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SDL_free(wnewpath);
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SDL_free(woldpath);
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if (!rc) {
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return WIN_SetError("Couldn't copy path");
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}
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return true;
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}
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bool SDL_SYS_CreateDirectory(const char *path)
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{
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WCHAR *wpath = WIN_UTF8ToStringW(path);
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if (!wpath) {
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return false;
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}
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DWORD rc = CreateDirectoryW(wpath, NULL);
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if (!rc && (GetLastError() == ERROR_ALREADY_EXISTS)) {
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WIN32_FILE_ATTRIBUTE_DATA winstat;
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if (GetFileAttributesExW(wpath, GetFileExInfoStandard, &winstat)) {
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if (winstat.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
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rc = 1; // exists and is already a directory: cool.
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}
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}
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}
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SDL_free(wpath);
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if (!rc) {
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return WIN_SetError("Couldn't create directory");
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}
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return true;
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}
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bool SDL_SYS_GetPathInfo(const char *path, SDL_PathInfo *info)
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{
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WCHAR *wpath = WIN_UTF8ToStringW(path);
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if (!wpath) {
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return false;
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}
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WIN32_FILE_ATTRIBUTE_DATA winstat;
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const BOOL rc = GetFileAttributesExW(wpath, GetFileExInfoStandard, &winstat);
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SDL_free(wpath);
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if (!rc) {
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return WIN_SetError("Can't stat");
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}
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if (winstat.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
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info->type = SDL_PATHTYPE_DIRECTORY;
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info->size = 0;
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} else if (winstat.dwFileAttributes & (FILE_ATTRIBUTE_OFFLINE | FILE_ATTRIBUTE_DEVICE)) {
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info->type = SDL_PATHTYPE_OTHER;
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info->size = ((((Uint64) winstat.nFileSizeHigh) << 32) | winstat.nFileSizeLow);
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} else {
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info->type = SDL_PATHTYPE_FILE;
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info->size = ((((Uint64) winstat.nFileSizeHigh) << 32) | winstat.nFileSizeLow);
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}
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info->create_time = SDL_TimeFromWindows(winstat.ftCreationTime.dwLowDateTime, winstat.ftCreationTime.dwHighDateTime);
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info->modify_time = SDL_TimeFromWindows(winstat.ftLastWriteTime.dwLowDateTime, winstat.ftLastWriteTime.dwHighDateTime);
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info->access_time = SDL_TimeFromWindows(winstat.ftLastAccessTime.dwLowDateTime, winstat.ftLastAccessTime.dwHighDateTime);
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return true;
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}
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#endif // SDL_FSOPS_WINDOWS
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