mirror of
https://github.com/libretro/ppsspp.git
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290 lines
8.2 KiB
C++
290 lines
8.2 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 "file/file_util.h"
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#include "Common/FileUtil.h"
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#include "Core/MIPS/MIPS.h"
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#include "Core/MIPS/MIPSCodeUtils.h"
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#include "Core/FileSystems/MetaFileSystem.h"
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#include "Core/HLE/HLE.h"
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#include "Core/HLE/sceKernelModule.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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// TODO : improve, look in the file more
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IdentifiedFileType Identify_File(std::string &filename)
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{
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if (filename.size() == 0) {
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ERROR_LOG(LOADER, "invalid filename %s", filename.c_str());
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return FILETYPE_ERROR;
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}
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FileInfo info;
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if (!getFileInfo(filename.c_str(), &info)) {
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return FILETYPE_ERROR;
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}
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std::string extension = filename.size() >= 5 ? filename.substr(filename.size() - 4) : "";
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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 ((info.size % 2352) == 0)
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{
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FILE *f = File::OpenCFile(filename.c_str(), "rb");
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if (!f) {
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// File does not exists
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return FILETYPE_ERROR;
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}
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unsigned char sync[12];
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fread(sync,1,12,f);
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fclose(f);
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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 FILETYPE_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 FILETYPE_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 FILETYPE_PSP_ISO;
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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 (info.isDirectory) {
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if (filename.size() > 4) {
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FileInfo ebootInfo;
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// Check for existence of EBOOT.PBP, as required for "Directory games".
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if (getFileInfo((filename + "/EBOOT.PBP").c_str(), &ebootInfo)) {
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if (ebootInfo.exists) {
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return FILETYPE_PSP_PBP_DIRECTORY;
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}
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}
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// check if it's a disc directory
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if (getFileInfo((filename + "/PSP_GAME").c_str(), &ebootInfo)) {
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if (ebootInfo.exists) {
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return FILETYPE_PSP_DISC_DIRECTORY;
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}
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}
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}
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return FILETYPE_NORMAL_DIRECTORY;
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}
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FILE *f = File::OpenCFile(filename.c_str(), "rb");
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if (!f) {
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// File does not exists
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return FILETYPE_ERROR;
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}
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u32_le id;
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size_t readSize = fread(&id, 4, 1, f);
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if (readSize != 1) {
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fclose(f);
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return FILETYPE_ERROR;
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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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fseek(f, 0x24, SEEK_SET);
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fread(&psar_offset, 4, 1, f);
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fseek(f, psar_offset, SEEK_SET);
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fread(&psar_id, 4, 1, f);
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break;
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case '!raR':
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return FILETYPE_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 FILETYPE_ARCHIVE_ZIP;
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}
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fclose(f);
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if (id == 'FLE\x7F') {
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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 FILETYPE_PSP_ELF;
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}
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return FILETYPE_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(filename.c_str());
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if (pbp.IsValid()) {
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if (!pbp.IsELF()) {
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size_t sfoSize;
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u8 *sfoData = pbp.GetSubFile(PBP_PARAM_SFO, &sfoSize);
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{
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recursive_mutex _lock;
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lock_guard lock(_lock);
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ParamSFOData paramSFO;
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paramSFO.ReadSFO(sfoData, sfoSize);
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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 FILETYPE_PSP_PS1_PBP;
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}
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delete[] sfoData;
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}
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}
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if (psar_id == 'MUPN') {
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return FILETYPE_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 FILETYPE_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 = getDir(filename);
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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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filename = path;
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return FILETYPE_PSP_PBP_DIRECTORY;
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}
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return FILETYPE_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 FILETYPE_PSP_PBP;
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} else if (!strcasecmp(extension.c_str(),".bin")) {
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return FILETYPE_UNKNOWN_BIN;
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} else if (!strcasecmp(extension.c_str(),".zip")) {
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return FILETYPE_ARCHIVE_ZIP;
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} else if (!strcasecmp(extension.c_str(),".rar")) {
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return FILETYPE_ARCHIVE_RAR;
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} else if (!strcasecmp(extension.c_str(),".r00")) {
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return FILETYPE_ARCHIVE_RAR;
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} else if (!strcasecmp(extension.c_str(),".r01")) {
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return FILETYPE_ARCHIVE_RAR;
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}
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return FILETYPE_UNKNOWN;
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}
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bool LoadFile(std::string &filename, std::string *error_string) {
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// Note that this can modify filename!
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switch (Identify_File(filename)) {
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case FILETYPE_PSP_PBP_DIRECTORY:
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{
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std::string ebootFilename = filename + "/EBOOT.PBP";
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FileInfo fileInfo;
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getFileInfo((filename + "/EBOOT.PBP").c_str(), &fileInfo);
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if (fileInfo.exists) {
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INFO_LOG(LOADER, "File is a PBP in a directory!");
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std::string ebootPath = filename + "/EBOOT.PBP";
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IdentifiedFileType ebootType = Identify_File(ebootPath);
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if (ebootType == FILETYPE_PSP_ISO_NP) {
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InitMemoryForGameISO(ebootPath);
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pspFileSystem.SetStartingDirectory("disc0:/PSP_GAME/USRDIR");
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return Load_PSP_ISO(filename.c_str(), error_string);
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}
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else if (ebootType == FILETYPE_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 = filename;
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size_t pos = path.find("/PSP/GAME/");
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if (pos != std::string::npos)
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pspFileSystem.SetStartingDirectory("ms0:" + path.substr(pos));
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return Load_PSP_ELF_PBP(ebootFilename.c_str(), 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 FILETYPE_PSP_PBP:
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case FILETYPE_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(filename.c_str(), error_string);
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}
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case FILETYPE_PSP_ISO:
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case FILETYPE_PSP_ISO_NP:
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case FILETYPE_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(filename.c_str(), error_string);
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case FILETYPE_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 FILETYPE_ERROR:
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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 FILETYPE_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 FILETYPE_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 FILETYPE_ISO_MODE2:
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*error_string = "PSX game image detected.";
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break;
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case FILETYPE_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 FILETYPE_UNKNOWN_BIN:
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case FILETYPE_UNKNOWN_ELF:
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case FILETYPE_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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