mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-11-23 13:30:02 +00:00
d4dedeeeb8
On older Android versions (that still support Android Storage Framework), filenames are not always preserved in Content URIs, they can look like .../msf:342 and things like that. So identify a few more file types by content if filename identification fails.
424 lines
14 KiB
C++
424 lines
14 KiB
C++
// Copyright (c) 2012- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include <algorithm>
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#include <cstdio>
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#include "Common/File/FileUtil.h"
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#include "Common/File/Path.h"
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#include "Common/StringUtils.h"
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#include "Core/FileLoaders/CachingFileLoader.h"
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#include "Core/FileLoaders/DiskCachingFileLoader.h"
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#include "Core/FileLoaders/HTTPFileLoader.h"
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#include "Core/FileLoaders/LocalFileLoader.h"
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#include "Core/FileLoaders/RetryingFileLoader.h"
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#include "Core/FileSystems/MetaFileSystem.h"
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#include "Core/PSPLoaders.h"
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#include "Core/MemMap.h"
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#include "Core/Loaders.h"
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#include "Core/System.h"
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#include "Core/ELF/PBPReader.h"
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#include "Core/ELF/ParamSFO.h"
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static std::map<std::string, std::unique_ptr<FileLoaderFactory>> factories;
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void RegisterFileLoaderFactory(std::string prefix, std::unique_ptr<FileLoaderFactory> factory) {
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factories[prefix] = std::move(factory);
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}
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FileLoader *ConstructFileLoader(const Path &filename) {
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if (filename.Type() == PathType::HTTP) {
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FileLoader *baseLoader = new RetryingFileLoader(new HTTPFileLoader(filename));
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// For headless, avoid disk caching since it's usually used for tests that might mutate.
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if (!PSP_CoreParameter().headLess) {
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baseLoader = new DiskCachingFileLoader(baseLoader);
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}
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return new CachingFileLoader(baseLoader);
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}
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for (auto &iter : factories) {
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if (startsWith(filename.ToString(), iter.first)) {
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return iter.second->ConstructFileLoader(filename);
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}
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}
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return new LocalFileLoader(filename);
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}
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// TODO : improve, look in the file more
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IdentifiedFileType Identify_File(FileLoader *fileLoader, std::string *errorString) {
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*errorString = "";
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if (fileLoader == nullptr) {
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*errorString = "Invalid fileLoader";
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return IdentifiedFileType::ERROR_IDENTIFYING;
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}
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if (fileLoader->GetPath().size() == 0) {
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*errorString = "Invalid filename " + fileLoader->GetPath().ToString();
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return IdentifiedFileType::ERROR_IDENTIFYING;
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}
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if (!fileLoader->Exists()) {
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*errorString = "IdentifyFile: File doesn't exist: " + fileLoader->GetPath().ToString();
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return IdentifiedFileType::ERROR_IDENTIFYING;
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}
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std::string extension = fileLoader->GetPath().GetFileExtension();
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if (extension == ".iso") {
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// may be a psx iso, they have 2352 byte sectors. You never know what some people try to open
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if ((fileLoader->FileSize() % 2352) == 0) {
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unsigned char sync[12];
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fileLoader->ReadAt(0, 12, sync);
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// each sector in a mode2 image starts with these 12 bytes
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if (memcmp(sync,"\x00\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\x00", 12) == 0) {
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*errorString = "ISO in Mode 2: Not a PSP game";
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return IdentifiedFileType::ISO_MODE2;
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}
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// maybe it also just happened to have that size, let's assume it's a PSP ISO and error out later if it's not.
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}
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return IdentifiedFileType::PSP_ISO;
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} else if (extension == ".cso") {
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return IdentifiedFileType::PSP_ISO;
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} else if (extension == ".ppst") {
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return IdentifiedFileType::PPSSPP_SAVESTATE;
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} else if (extension == ".ppdmp") {
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char data[8]{};
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fileLoader->ReadAt(0, 8, data);
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if (memcmp(data, "PPSSPPGE", 8) == 0) {
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return IdentifiedFileType::PPSSPP_GE_DUMP;
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}
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}
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// First, check if it's a directory with an EBOOT.PBP in it.
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if (fileLoader->IsDirectory()) {
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Path filename = fileLoader->GetPath();
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if (filename.size() > 4) {
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// Check for existence of EBOOT.PBP, as required for "Directory games".
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if (File::Exists(filename / "EBOOT.PBP")) {
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return IdentifiedFileType::PSP_PBP_DIRECTORY;
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}
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// check if it's a disc directory
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if (File::Exists(filename / "PSP_GAME")) {
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return IdentifiedFileType::PSP_DISC_DIRECTORY;
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}
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// Not that, okay, let's guess it's a savedata directory if it has a param.sfo...
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if (File::Exists(filename / "PARAM.SFO")) {
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return IdentifiedFileType::PSP_SAVEDATA_DIRECTORY;
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}
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}
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return IdentifiedFileType::NORMAL_DIRECTORY;
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}
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// OK, quick methods of identification for common types failed. Moving on to more expensive methods,
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// starting by reading the first few bytes.
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u32_le id;
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size_t readSize = fileLoader->ReadAt(0, 4, 1, &id);
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if (readSize != 1) {
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*errorString = "Failed to read identification bytes";
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return IdentifiedFileType::ERROR_IDENTIFYING;
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}
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u32_le psar_offset = 0, psar_id = 0;
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u32 _id = id;
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if (!memcmp(&_id, "PK\x03\x04", 4) || !memcmp(&_id, "PK\x05\x06", 4) || !memcmp(&_id, "PK\x07\x08", 4)) {
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return IdentifiedFileType::ARCHIVE_ZIP;
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} else if (!memcmp(&_id, "\x00PBP", 4)) {
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fileLoader->ReadAt(0x24, 4, 1, &psar_offset);
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fileLoader->ReadAt(psar_offset, 4, 1, &psar_id);
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// Fall through to the below if chain.
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} else if (!memcmp(&_id, "Rar!", 4)) {
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return IdentifiedFileType::ARCHIVE_RAR;
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} else if (!memcmp(&_id, "\x37\x7A\xBC\xAF", 4)) {
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return IdentifiedFileType::ARCHIVE_7Z;
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} else if (!memcmp(&_id, "\0\0\0\0", 4)) {
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// All zeroes. ISO files start like this but their 16th 2048-byte sector contains metadata.
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if (fileLoader->FileSize() > 0x8100) {
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char buffer[16];
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fileLoader->ReadAt(0x8000, sizeof(buffer), buffer);
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if (!memcmp(buffer + 1, "CD001", 5)) {
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// It's an ISO file.
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if (!memcmp(buffer + 8, "PSP GAME", 8)) {
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return IdentifiedFileType::PSP_ISO;
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}
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return IdentifiedFileType::UNKNOWN_ISO;
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}
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}
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} else if (!memcmp(&_id, "CISO", 4)) {
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// CISO are not used for many other kinds of ISO so let's just guess it's a PSP one and let it
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// fail later...
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return IdentifiedFileType::PSP_ISO;
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}
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if (id == 'FLE\x7F') {
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Path filename = fileLoader->GetPath();
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// There are a few elfs misnamed as pbp (like Trig Wars), accept that.
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if (extension == ".plf" || strstr(filename.GetFilename().c_str(), "BOOT.BIN") ||
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extension == ".elf" || extension == ".prx" || extension == ".pbp") {
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return IdentifiedFileType::PSP_ELF;
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}
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return IdentifiedFileType::UNKNOWN_ELF;
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} else if (id == 'PBP\x00') {
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// Do this PS1 eboot check FIRST before checking other eboot types.
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// It seems like some are malformed and slip through the PSAR check below.
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PBPReader pbp(fileLoader);
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if (pbp.IsValid() && !pbp.IsELF()) {
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std::vector<u8> sfoData;
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if (pbp.GetSubFile(PBP_PARAM_SFO, &sfoData)) {
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ParamSFOData paramSFO;
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paramSFO.ReadSFO(sfoData);
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// PS1 Eboots are supposed to use "ME" as their PARAM SFO category.
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// If they don't, and they're still malformed (e.g. PSISOIMG0000 isn't found), there's nothing we can do.
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if (paramSFO.GetValueString("CATEGORY") == "ME")
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return IdentifiedFileType::PSP_PS1_PBP;
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}
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}
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if (psar_id == 'MUPN') {
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return IdentifiedFileType::PSP_ISO_NP;
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}
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// PS1 PSAR begins with "PSISOIMG0000"
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if (psar_id == 'SISP') {
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return IdentifiedFileType::PSP_PS1_PBP;
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}
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// Let's check if we got pointed to a PBP within such a directory.
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// If so we just move up and return the directory itself as the game.
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// If loading from memstick...
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if (fileLoader->GetPath().FilePathContainsNoCase("PSP/GAME/")) {
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return IdentifiedFileType::PSP_PBP_DIRECTORY;
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}
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return IdentifiedFileType::PSP_PBP;
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} else if (extension == ".pbp") {
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ERROR_LOG(LOADER, "A PBP with the wrong magic number?");
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return IdentifiedFileType::PSP_PBP;
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} else if (extension == ".bin") {
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return IdentifiedFileType::UNKNOWN_BIN;
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} else if (extension == ".zip") {
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return IdentifiedFileType::ARCHIVE_ZIP;
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} else if (extension == ".rar") {
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return IdentifiedFileType::ARCHIVE_RAR;
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} else if (extension == ".r00") {
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return IdentifiedFileType::ARCHIVE_RAR;
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} else if (extension == ".r01") {
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return IdentifiedFileType::ARCHIVE_RAR;
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} else if (extension == ".7z") {
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return IdentifiedFileType::ARCHIVE_7Z;
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}
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return IdentifiedFileType::UNKNOWN;
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}
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FileLoader *ResolveFileLoaderTarget(FileLoader *fileLoader) {
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std::string errorString;
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IdentifiedFileType type = Identify_File(fileLoader, &errorString);
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if (type == IdentifiedFileType::PSP_PBP_DIRECTORY) {
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const Path ebootFilename = ResolvePBPFile(fileLoader->GetPath());
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if (ebootFilename != fileLoader->GetPath()) {
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// Switch fileLoader to the actual EBOOT.
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delete fileLoader;
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fileLoader = ConstructFileLoader(ebootFilename);
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}
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}
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return fileLoader;
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}
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Path ResolvePBPDirectory(const Path &filename) {
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if (filename.GetFilename() == "EBOOT.PBP") {
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return filename.NavigateUp();
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} else {
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return filename;
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}
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}
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Path ResolvePBPFile(const Path &filename) {
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if (filename.GetFilename() != "EBOOT.PBP") {
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return filename / "EBOOT.PBP";
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} else {
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return filename;
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}
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}
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bool LoadFile(FileLoader **fileLoaderPtr, std::string *error_string) {
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FileLoader *&fileLoader = *fileLoaderPtr;
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// Note that this can modify filename!
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IdentifiedFileType type = Identify_File(fileLoader, error_string);
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switch (type) {
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case IdentifiedFileType::PSP_PBP_DIRECTORY:
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{
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// TODO: Perhaps we should/can never get here now?
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fileLoader = ResolveFileLoaderTarget(fileLoader);
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if (fileLoader->Exists()) {
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INFO_LOG(LOADER, "File is a PBP in a directory!");
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IdentifiedFileType ebootType = Identify_File(fileLoader, error_string);
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if (ebootType == IdentifiedFileType::PSP_ISO_NP) {
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InitMemoryForGameISO(fileLoader);
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pspFileSystem.SetStartingDirectory("disc0:/PSP_GAME/USRDIR");
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return Load_PSP_ISO(fileLoader, error_string);
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}
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else if (ebootType == IdentifiedFileType::PSP_PS1_PBP) {
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*error_string = "PS1 EBOOTs are not supported by PPSSPP.";
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coreState = CORE_BOOT_ERROR;
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return false;
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} else if (ebootType == IdentifiedFileType::ERROR_IDENTIFYING) {
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// IdentifyFile will have written to errorString.
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coreState = CORE_BOOT_ERROR;
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return false;
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}
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std::string dir = fileLoader->GetPath().GetDirectory();
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size_t pos = dir.find("PSP/GAME/");
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if (pos != std::string::npos) {
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dir = ResolvePBPDirectory(Path(dir)).ToString();
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pspFileSystem.SetStartingDirectory("ms0:/" + dir.substr(pos));
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}
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return Load_PSP_ELF_PBP(fileLoader, error_string);
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} else {
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*error_string = "No EBOOT.PBP, misidentified game";
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coreState = CORE_BOOT_ERROR;
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return false;
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}
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}
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case IdentifiedFileType::PSP_PBP:
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case IdentifiedFileType::PSP_ELF:
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{
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INFO_LOG(LOADER, "File is an ELF or loose PBP!");
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return Load_PSP_ELF_PBP(fileLoader, error_string);
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}
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case IdentifiedFileType::PSP_ISO:
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case IdentifiedFileType::PSP_ISO_NP:
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case IdentifiedFileType::PSP_DISC_DIRECTORY: // behaves the same as the mounting is already done by now
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pspFileSystem.SetStartingDirectory("disc0:/PSP_GAME/USRDIR");
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return Load_PSP_ISO(fileLoader, error_string);
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case IdentifiedFileType::PSP_PS1_PBP:
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*error_string = "PS1 EBOOTs are not supported by PPSSPP.";
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break;
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case IdentifiedFileType::ARCHIVE_RAR:
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#ifdef WIN32
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*error_string = "RAR file detected (Require WINRAR)";
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#else
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*error_string = "RAR file detected (Require UnRAR)";
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#endif
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break;
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case IdentifiedFileType::ARCHIVE_ZIP:
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#ifdef WIN32
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*error_string = "ZIP file detected (Require WINRAR)";
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#else
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*error_string = "ZIP file detected (Require UnRAR)";
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#endif
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break;
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case IdentifiedFileType::ARCHIVE_7Z:
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#ifdef WIN32
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*error_string = "7z file detected (Require 7-Zip)";
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#else
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*error_string = "7z file detected (Require 7-Zip)";
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#endif
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break;
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case IdentifiedFileType::ISO_MODE2:
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*error_string = "PSX game image detected.";
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break;
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case IdentifiedFileType::NORMAL_DIRECTORY:
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ERROR_LOG(LOADER, "Just a directory.");
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*error_string = "Just a directory.";
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break;
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case IdentifiedFileType::PPSSPP_SAVESTATE:
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*error_string = "This is a saved state, not a game."; // Actually, we could make it load it...
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break;
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case IdentifiedFileType::PSP_SAVEDATA_DIRECTORY:
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*error_string = "This is save data, not a game."; // Actually, we could make it load it...
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break;
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case IdentifiedFileType::PPSSPP_GE_DUMP:
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return Load_PSP_GE_Dump(fileLoader, error_string);
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case IdentifiedFileType::UNKNOWN_BIN:
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case IdentifiedFileType::UNKNOWN_ELF:
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case IdentifiedFileType::UNKNOWN_ISO:
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case IdentifiedFileType::UNKNOWN:
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ERROR_LOG(LOADER, "Unknown file type: %s (%s)", fileLoader->GetPath().c_str(), error_string->c_str());
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*error_string = "Unknown file type: " + fileLoader->GetPath().ToString();
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break;
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case IdentifiedFileType::ERROR_IDENTIFYING:
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*error_string = *error_string + ": " + (fileLoader ? fileLoader->LatestError() : "");
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ERROR_LOG(LOADER, "Error while identifying file: %s", error_string->c_str());
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break;
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default:
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*error_string = StringFromFormat("Unhandled identified file type %d", (int)type);
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ERROR_LOG(LOADER, "%s", error_string->c_str());
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break;
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}
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coreState = CORE_BOOT_ERROR;
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return false;
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}
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bool UmdReplace(const Path &filepath, std::string &error) {
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IFileSystem *currentUMD = pspFileSystem.GetSystem("disc0:");
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if (!currentUMD) {
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error = "has no disc";
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return false;
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}
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FileLoader *loadedFile = ConstructFileLoader(filepath);
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if (!loadedFile->Exists()) {
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delete loadedFile;
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error = loadedFile->GetPath().ToVisualString() + " doesn't exist";
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return false;
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}
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UpdateLoadedFile(loadedFile);
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loadedFile = ResolveFileLoaderTarget(loadedFile);
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std::string errorString;
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IdentifiedFileType type = Identify_File(loadedFile, &errorString);
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switch (type) {
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case IdentifiedFileType::PSP_ISO:
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case IdentifiedFileType::PSP_ISO_NP:
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case IdentifiedFileType::PSP_DISC_DIRECTORY:
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if (!ReInitMemoryForGameISO(loadedFile)) {
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error = "reinit memory failed";
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return false;
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}
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break;
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default:
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error = "Unsupported file type: " + std::to_string((int)type) + " " + errorString;
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return false;
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break;
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}
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return true;
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}
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