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Use the libretro VFS interface in libretro builds

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This commit is contained in:
刘皓
2026-01-01 00:24:01 -05:00
parent a018cfc017
commit 5716cbd41d
30 changed files with 624 additions and 252 deletions
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Core/FileSystems/DirectoryFileSystem.cpp
+61 -9
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@@ -155,7 +155,28 @@ bool DirectoryFileHandle::Open(const Path &basePath, std::string &fileName, File
}
//TODO: tests, should append seek to end of file? seeking in a file opened for append?
#if PPSSPP_PLATFORM(WINDOWS)
#ifdef HAVE_LIBRETRO_VFS
int flags = 0;
if (access & FILEACCESS_READ && access & FILEACCESS_WRITE)
flags = RETRO_VFS_FILE_ACCESS_READ_WRITE;
else if (access & FILEACCESS_WRITE)
flags = RETRO_VFS_FILE_ACCESS_WRITE;
else if (access & FILEACCESS_READ && access & FILEACCESS_CREATE)
flags = RETRO_VFS_FILE_ACCESS_READ_WRITE;
else
flags = RETRO_VFS_FILE_ACCESS_READ;
bool success = false;
if (!(access & FILEACCESS_CREATE)) {
hFile = filestream_open(fullName.c_str(), flags & RETRO_VFS_FILE_ACCESS_WRITE ? flags | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING : flags, RETRO_VFS_FILE_ACCESS_HINT_NONE);
success = hFile != nullptr;
} else if (!(access & FILEACCESS_EXCL)) {
hFile = filestream_open(fullName.c_str(), flags & RETRO_VFS_FILE_ACCESS_WRITE && File::Exists(fullName) ? flags | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING : flags, RETRO_VFS_FILE_ACCESS_HINT_NONE);
success = hFile != nullptr;
} else if (!File::Exists(fullName)) {
hFile = filestream_open(fullName.c_str(), flags & RETRO_VFS_FILE_ACCESS_WRITE ? flags | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING : flags, RETRO_VFS_FILE_ACCESS_HINT_NONE);
success = hFile != nullptr;
}
#elif PPSSPP_PLATFORM(WINDOWS)
// Convert parameters to Windows permissions and access
DWORD desired = 0;
DWORD sharemode = 0;
@@ -278,7 +299,19 @@ bool DirectoryFileHandle::Open(const Path &basePath, std::string &fileName, File
DEBUG_LOG(Log::FileSystem, "Case may have been incorrect, second try opening %s (%s)", fullName.c_str(), fileName.c_str());
// And try again with the correct case this time
#if PPSSPP_PLATFORM(UWP)
#ifdef HAVE_LIBRETRO_VFS
success = false;
if (!(access & FILEACCESS_CREATE)) {
hFile = filestream_open(fullName.c_str(), flags & RETRO_VFS_FILE_ACCESS_WRITE ? flags | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING : flags, RETRO_VFS_FILE_ACCESS_HINT_NONE);
success = hFile != nullptr;
} else if (!(access & FILEACCESS_EXCL)) {
hFile = filestream_open(fullName.c_str(), flags & RETRO_VFS_FILE_ACCESS_WRITE && File::Exists(fullName) ? flags | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING : flags, RETRO_VFS_FILE_ACCESS_HINT_NONE);
success = hFile != nullptr;
} else if (!File::Exists(fullName)) {
hFile = filestream_open(fullName.c_str(), flags & RETRO_VFS_FILE_ACCESS_WRITE ? flags | RETRO_VFS_FILE_ACCESS_UPDATE_EXISTING : flags, RETRO_VFS_FILE_ACCESS_HINT_NONE);
success = hFile != nullptr;
}
#elif PPSSPP_PLATFORM(UWP)
// Should never get here.
#elif PPSSPP_PLATFORM(WINDOWS)
// Unlikely to get here, heh.
@@ -291,7 +324,7 @@ bool DirectoryFileHandle::Open(const Path &basePath, std::string &fileName, File
}
}
#if !PPSSPP_PLATFORM(WINDOWS)
#if !PPSSPP_PLATFORM(WINDOWS) && !defined(HAVE_LIBRETRO_VFS)
if (success) {
// Reject directories, even if we succeed in opening them.
// TODO: Might want to do this stat first...
@@ -337,7 +370,9 @@ size_t DirectoryFileHandle::Read(u8* pointer, s64 size)
}
}
if (size > 0) {
#ifdef _WIN32
#ifdef HAVE_LIBRETRO_VFS
bytesRead = fread(pointer, 1, size, hFile);
#elif defined(_WIN32)
::ReadFile(hFile, (LPVOID)pointer, (DWORD)size, (LPDWORD)&bytesRead, 0);
#else
bytesRead = read(hFile, pointer, size);
@@ -351,7 +386,9 @@ size_t DirectoryFileHandle::Write(const u8* pointer, s64 size)
size_t bytesWritten = 0;
bool diskFull = false;
#ifdef _WIN32
#ifdef HAVE_LIBRETRO_VFS
bytesWritten = fwrite(pointer, 1, size, hFile);
#elif defined(_WIN32)
BOOL success = ::WriteFile(hFile, (LPVOID)pointer, (DWORD)size, (LPDWORD)&bytesWritten, 0);
if (success == FALSE) {
DWORD err = GetLastError();
@@ -406,7 +443,15 @@ size_t DirectoryFileHandle::Seek(s32 position, FileMove type)
}
size_t result;
#ifdef _WIN32
#ifdef HAVE_LIBRETRO_VFS
int moveMethod = 0;
switch (type) {
case FILEMOVE_BEGIN: moveMethod = SEEK_SET; break;
case FILEMOVE_CURRENT: moveMethod = SEEK_CUR; break;
case FILEMOVE_END: moveMethod = SEEK_END; break;
}
result = File::Fseektell(hFile, position, moveMethod);
#elif defined(_WIN32)
DWORD moveMethod = 0;
switch (type) {
case FILEMOVE_BEGIN: moveMethod = FILE_BEGIN; break;
@@ -434,7 +479,11 @@ size_t DirectoryFileHandle::Seek(s32 position, FileMove type)
void DirectoryFileHandle::Close() {
if (needsTrunc_ != -1) {
#ifdef _WIN32
#ifdef HAVE_LIBRETRO_VFS
if (filestream_truncate(hFile, needsTrunc_) != 0) {
ERROR_LOG(Log::FileSystem, "Failed to truncate file to %d bytes", (int)needsTrunc_);
}
#elif defined(_WIN32)
Seek((s32)needsTrunc_, FILEMOVE_BEGIN);
if (SetEndOfFile(hFile) == 0) {
ERROR_LOG(Log::FileSystem, "Failed to truncate file to %d bytes", (int)needsTrunc_);
@@ -447,7 +496,10 @@ void DirectoryFileHandle::Close() {
#endif
}
#ifdef _WIN32
#ifdef HAVE_LIBRETRO_VFS
if (hFile != nullptr)
fclose(hFile);
#elif defined(_WIN32)
if (hFile != (HANDLE)-1)
CloseHandle(hFile);
#else
@@ -598,7 +650,7 @@ int DirectoryFileSystem::OpenFile(std::string filename, FileAccess access, const
}
return err;
} else {
#ifdef _WIN32
#if defined(_WIN32) || defined(HAVE_LIBRETRO_VFS)
if (access & FILEACCESS_APPEND) {
entry.hFile.Seek(0, FILEMOVE_END);
}