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#include "espfile.h"
#include "espexceptions.h"
#include "subrecord.h"
#include "tes3subrecord.h"
#include <bitset>
#include <cstring>
#include <sstream>
ESP::File::File(const std::string& fileName)
{
m_File.open(fileName, std::fstream::in | std::fstream::binary);
init();
}
ESP::File::File(const std::wstring& fileName)
{
#ifdef _WIN32
m_File.open(fileName, std::fstream::in | std::fstream::binary);
#else
// Linux: properly encode wstring → UTF-8. The old naive
// `string(w.begin(), w.end())` copy truncated any codepoint > 0x7F
// (e.g. ö U+00F6, – U+2013) which broke paths like "Mörskom Estate" or
// "Official Master Files – Cleaned".
std::string narrowName;
narrowName.reserve(fileName.size());
for (wchar_t wc : fileName) {
const auto cp = static_cast<uint32_t>(wc);
if (cp < 0x80) {
narrowName.push_back(static_cast<char>(cp));
} else if (cp < 0x800) {
narrowName.push_back(static_cast<char>(0xC0 | (cp >> 6)));
narrowName.push_back(static_cast<char>(0x80 | (cp & 0x3F)));
} else if (cp < 0x10000) {
narrowName.push_back(static_cast<char>(0xE0 | (cp >> 12)));
narrowName.push_back(static_cast<char>(0x80 | ((cp >> 6) & 0x3F)));
narrowName.push_back(static_cast<char>(0x80 | (cp & 0x3F)));
} else {
narrowName.push_back(static_cast<char>(0xF0 | (cp >> 18)));
narrowName.push_back(static_cast<char>(0x80 | ((cp >> 12) & 0x3F)));
narrowName.push_back(static_cast<char>(0x80 | ((cp >> 6) & 0x3F)));
narrowName.push_back(static_cast<char>(0x80 | (cp & 0x3F)));
}
}
m_File.open(narrowName, std::fstream::in | std::fstream::binary);
#endif
init();
}
class membuf : public std::basic_streambuf<char>
{
public:
membuf(const char* start, size_t size)
{
// baad me! this is intended for an istream only so we're not modifying
char* startMod = const_cast<char*>(start);
setg(startMod, startMod, startMod + size);
}
};
void ESP::File::init()
{
if (!m_File.is_open()) {
throw ESP::InvalidFileException("file not found");
}
m_File.exceptions(std::ios_base::badbit);
uint8_t type[4];
if (!m_File.read(reinterpret_cast<char*>(type), 4)) {
throw ESP::InvalidFileException("file incomplete");
}
if (memcmp(type, "TES3", 4) == 0) {
ESP::TES3Record rec;
rec.readFrom(m_File);
while (!m_File.eof() && !m_File.fail()) {
ESP::TES3SubRecord subRec;
bool success = subRec.readFrom(m_File);
int headerSize = sizeof(m_TES3Header);
if (success) {
if (subRec.type() != TES3SubRecord::TYPE_UNKNOWN) {
switch (subRec.type()) {
case TES3SubRecord::TYPE_HEDR:
if (subRec.data().size() != sizeof(m_TES3Header)) {
printf("invalid header size\n");
m_Header.version = 0.0f;
m_Header.numRecords = 1; // prevent this esp appear like a dummy
} else {
memcpy(&m_TES3Header, &subRec.data()[0], sizeof(m_TES3Header));
}
m_Header.version = m_TES3Header.version;
m_Header.numRecords = m_TES3Header.numRecords;
m_Author = reinterpret_cast<const char*>(m_TES3Header.author);
m_Description = reinterpret_cast<const char*>(m_TES3Header.description);
break;
case TES3SubRecord::TYPE_MAST:
if (subRec.data().size() > 0)
m_Masters.insert(reinterpret_cast<const char*>(&subRec.data()[0]));
break;
}
}
}
}
} else if (memcmp(type, "TES4", 4) == 0) {
m_File.seekg(0);
m_MainRecord = readRecord();
const std::vector<uint8_t>& data = m_MainRecord.data();
if (data.empty()) {
throw ESP::InvalidRecordException("record has no data");
}
membuf buf(reinterpret_cast<const char*>(data.data()), data.size());
std::istream stream(&buf);
while (!stream.eof() && !stream.fail()) {
SubRecord rec;
bool success = rec.readFrom(stream);
if (success) {
if (rec.type() != SubRecord::TYPE_UNKNOWN) {
switch (rec.type()) {
case SubRecord::TYPE_HEDR:
onHEDR(rec);
break;
case SubRecord::TYPE_MAST:
onMAST(rec);
break;
case SubRecord::TYPE_CNAM:
onCNAM(rec);
break;
case SubRecord::TYPE_SNAM:
onSNAM(rec);
break;
}
}
}
}
} else {
throw ESP::InvalidFileException("invalid file type");
}
}
void ESP::File::onHEDR(const SubRecord& rec)
{
if (rec.data().size() != sizeof(m_Header)) {
printf("invalid header size\n");
m_Header.version = 0.0f;
m_Header.numRecords = 1; // prevent this esp appear like a dummy
} else {
memcpy(&m_Header, &rec.data()[0], sizeof(m_Header));
}
}
void ESP::File::onMAST(const SubRecord& rec)
{
if (rec.data().size() > 0)
m_Masters.insert(reinterpret_cast<const char*>(&rec.data()[0]));
}
void ESP::File::onCNAM(const SubRecord& rec)
{
if (rec.data().size() > 0)
m_Author = reinterpret_cast<const char*>(&rec.data()[0]);
}
void ESP::File::onSNAM(const SubRecord& rec)
{
if (rec.data().size() > 0)
m_Description = reinterpret_cast<const char*>(&rec.data()[0]);
}
ESP::Record ESP::File::readRecord()
{
ESP::Record rec;
rec.readFrom(m_File);
return rec;
}
bool ESP::File::isMaster() const
{
return m_MainRecord.flagSet(Record::FLAG_MASTER);
}
bool ESP::File::isLight(bool overlaySupport) const
{
if (overlaySupport) {
return m_MainRecord.flagSet(Record::FLAG_LIGHT_ALTERNATE);
} else {
return m_MainRecord.flagSet(Record::FLAG_LIGHT);
}
}
bool ESP::File::isMedium() const
{
return m_MainRecord.flagSet(Record::FLAG_MEDIUM);
}
bool ESP::File::isOverlay() const
{
return m_MainRecord.flagSet(Record::FLAG_OVERLAY);
}
bool ESP::File::isBlueprint() const
{
return m_MainRecord.flagSet(Record::FLAG_BLUEPRINT);
}
bool ESP::File::isDummy() const
{
return m_Header.numRecords == 0;
}
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