mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-11-27 15:30:35 +00:00
338 lines
11 KiB
C++
338 lines
11 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 "base/stringutil.h"
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#include "file/file_util.h"
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#include "Common/FileUtil.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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FileLoader *ConstructFileLoader(const std::string &filename) {
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if (filename.find("http://") == 0 || filename.find("https://") == 0)
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return new CachingFileLoader(new DiskCachingFileLoader(new RetryingFileLoader(new HTTPFileLoader(filename))));
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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) {
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if (fileLoader == nullptr) {
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ERROR_LOG(LOADER, "Invalid fileLoader");
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return IdentifiedFileType::ERROR_IDENTIFYING;
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}
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if (fileLoader->Path().size() == 0) {
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ERROR_LOG(LOADER, "Invalid filename %s", fileLoader->Path().c_str());
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return IdentifiedFileType::ERROR_IDENTIFYING;
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}
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if (!fileLoader->Exists()) {
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return IdentifiedFileType::ERROR_IDENTIFYING;
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}
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std::string extension = fileLoader->Extension();
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if (!strcasecmp(extension.c_str(), ".iso"))
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{
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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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{
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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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{
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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,
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}
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return IdentifiedFileType::PSP_ISO;
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}
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else if (!strcasecmp(extension.c_str(),".cso"))
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{
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return IdentifiedFileType::PSP_ISO;
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}
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else if (!strcasecmp(extension.c_str(),".ppst"))
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{
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return IdentifiedFileType::PPSSPP_SAVESTATE;
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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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std::string filename = fileLoader->Path();
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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").c_str())) {
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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").c_str())) {
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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").c_str())) {
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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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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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return IdentifiedFileType::ERROR_IDENTIFYING;
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}
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u32 psar_offset = 0, psar_id = 0;
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u32 _id = id;
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switch (_id) {
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case 'PBP\x00':
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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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break;
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case '!raR':
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return IdentifiedFileType::ARCHIVE_RAR;
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case '\x04\x03KP':
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case '\x06\x05KP':
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case '\x08\x07KP':
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return IdentifiedFileType::ARCHIVE_ZIP;
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}
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if (id == 'FLE\x7F') {
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std::string filename = fileLoader->Path();
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// There are a few elfs misnamed as pbp (like Trig Wars), accept that.
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if (!strcasecmp(extension.c_str(), ".plf") || strstr(filename.c_str(),"BOOT.BIN") ||
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!strcasecmp(extension.c_str(), ".elf") || !strcasecmp(extension.c_str(), ".prx") ||
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!strcasecmp(extension.c_str(), ".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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}
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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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std::string path = File::GetDir(fileLoader->Path());
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// If loading from memstick...
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size_t pos = path.find("/PSP/GAME/");
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if (pos != std::string::npos) {
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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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}
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else if (!strcasecmp(extension.c_str(),".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 (!strcasecmp(extension.c_str(),".bin")) {
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return IdentifiedFileType::UNKNOWN_BIN;
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} else if (!strcasecmp(extension.c_str(),".zip")) {
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return IdentifiedFileType::ARCHIVE_ZIP;
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} else if (!strcasecmp(extension.c_str(),".rar")) {
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return IdentifiedFileType::ARCHIVE_RAR;
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} else if (!strcasecmp(extension.c_str(),".r00")) {
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return IdentifiedFileType::ARCHIVE_RAR;
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} else if (!strcasecmp(extension.c_str(),".r01")) {
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return IdentifiedFileType::ARCHIVE_RAR;
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} else if (!extension.empty() && !strcasecmp(extension.substr(1).c_str(), ".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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IdentifiedFileType type = Identify_File(fileLoader);
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if (type == IdentifiedFileType::PSP_PBP_DIRECTORY) {
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const std::string ebootFilename = ResolvePBPFile(fileLoader->Path());
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if (ebootFilename != fileLoader->Path()) {
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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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std::string ResolvePBPDirectory(const std::string &filename) {
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bool hasPBP = endsWith(filename, "/EBOOT.PBP");
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#ifdef _WIN32
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hasPBP = hasPBP || endsWith(filename, "\\EBOOT.PBP");
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#endif
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if (hasPBP) {
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return filename.substr(0, filename.length() - strlen("/EBOOT.PBP"));
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}
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return filename;
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}
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std::string ResolvePBPFile(const std::string &filename) {
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bool hasPBP = endsWith(filename, "/EBOOT.PBP");
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#ifdef _WIN32
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hasPBP = hasPBP || endsWith(filename, "\\EBOOT.PBP");
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#endif
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if (!hasPBP) {
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return filename + "/EBOOT.PBP";
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}
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return filename;
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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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switch (Identify_File(fileLoader)) {
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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);
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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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return false;
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}
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std::string path = fileLoader->Path();
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size_t pos = path.find("/PSP/GAME/");
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if (pos != std::string::npos) {
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path = ResolvePBPDirectory(path);
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pspFileSystem.SetStartingDirectory("ms0:" + path.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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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::ERROR_IDENTIFYING:
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ERROR_LOG(LOADER, "Could not read file");
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*error_string = "Error reading file";
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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::UNKNOWN_BIN:
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case IdentifiedFileType::UNKNOWN_ELF:
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case IdentifiedFileType::UNKNOWN:
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default:
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ERROR_LOG(LOADER, "Failed to identify file");
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*error_string = "Failed to identify file";
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break;
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}
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return false;
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}
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