Function cdvdUncheckedLoadDiscElf

pcsx2/CDVD/CDVD.cpp:393–429

}

static bool cdvdUncheckedLoadDiscElf(ElfObject* elfo, IsoReader& isor, const std::string_view elfpath, bool isPSXElf, Error* error)
{
	// Strip out cdrom: prefix, and any leading slashes.
	size_t start_pos = (elfpath[5] == '0') ? 7 : 6;
	while (start_pos < elfpath.size() && (elfpath[start_pos] == '\\' || elfpath[start_pos] == '/'))
		start_pos++;

	// Strip out any version information. Some games use ;2 (MLB2k6), others put multiple versions in
	// (Syphon Filter Omega Strain). The PS2 BIOS appears to ignore the suffix entirely, so we'll do
	// the same, and hope that no games actually have multiple ELFs with different versions.
	// Previous notes:
	//   Mimic PS2 behavior!
	//   Much trial-and-error with changing the ISOFS and BOOT2 contents of an image have shown that
	//   the PS2 BIOS performs the peculiar task of *ignoring* the version info from the parsed BOOT2
	//   filename *and* the ISOFS, when loading the game's ELF image.  What this means is:
	//
	//     1. a valid PS2 ELF can have any version (ISOFS), and the version need not match the one in SYSTEM.CNF.
	//     2. the version info on the file in the BOOT2 parameter of SYSTEM.CNF can be missing, 10 chars long,
	//        or anything else.  Its all ignored.
	//     3. Games loading their own files do *not* exhibit this behavior; likely due to using newer IOP modules
	//        or lower level filesystem APIs (fortunately that doesn't affect us).
	//
	size_t length = elfpath.length() - start_pos;
	const size_t semi_pos = elfpath.find(';', start_pos);
	if (semi_pos != std::string::npos)
		length = semi_pos - start_pos;

	std::string iso_filename(elfpath.substr(start_pos, length));
	DevCon.WriteLn(fmt::format("cdvdLoadElf(): '{}' -> '{}' in ISO.", elfpath, iso_filename));
	if (iso_filename.empty())
	{
		Error::SetString(error, "ISO filename is empty.");
		return false;
	}

	return elfo->OpenIsoFile(std::move(iso_filename), isor, isPSXElf, error);
}

bool cdvdLoadElf(ElfObject* elfo, const std::string_view elfpath, bool isPSXElf, Error* error)
{