file_error emu_file::load__7zped_file()
{
assert(m_file == NULL);
assert(m__7zdata.count() == 0);
assert(m__7zfile != NULL);
// allocate some memory
m__7zdata.resize(m__7zlength);
// read the data into our buffer and return
_7z_error _7zerr = _7z_file_decompress(m__7zfile, m__7zdata, m__7zdata.count());
if (_7zerr != _7ZERR_NONE)
{
m__7zdata.reset();
return FILERR_FAILURE;
}
// convert to RAM file
file_error filerr = core_fopen_ram(m__7zdata, m__7zdata.count(), m_openflags, &m_file);
if (filerr != FILERR_NONE)
{
m__7zdata.reset();
return FILERR_FAILURE;
}
// close out the _7Z file
_7z_file_close(m__7zfile);
m__7zfile = NULL;
return FILERR_NONE;
}
file_error emu_file::attempt__7zped()
{
astring filename;
// loop over directory parts up to the start of filename
while (1)
{
// find the final path separator
int dirsep = m_fullpath.rchr(0, PATH_SEPARATOR[0]);
if (dirsep == -1)
return FILERR_NOT_FOUND;
// insert the part from the right of the separator into the head of the filename
if (filename.len() > 0)
filename.ins(0, "/");
filename.inssubstr(0, m_fullpath, dirsep + 1, -1);
// remove this part of the filename and append a .7z extension
m_fullpath.substr(0, dirsep).cat(".7z");
// attempt to open the _7Z file
_7z_file *_7z;
_7z_error _7zerr = _7z_file_open(m_fullpath, &_7z);
// chop the ._7z back off the filename before continuing
m_fullpath.substr(0, dirsep);
// if we failed to open this file, continue scanning
if (_7zerr != _7ZERR_NONE)
continue;
int fileno = -1;
// see if we can find a file with the right name and (if available) crc
if (m_openflags & OPEN_FLAG_HAS_CRC) fileno = _7z_search_crc_match(_7z, m_crc, filename.cstr(), filename.len(), true, true);
// if that failed, look for a file with the right crc, but the wrong filename
if (fileno==-1)
if (m_openflags & OPEN_FLAG_HAS_CRC) fileno = _7z_search_crc_match(_7z, m_crc, filename.cstr(), filename.len(), true, false);
// if that failed, look for a file with the right name; reporting a bad checksum
// is more helpful and less confusing than reporting "rom not found"
if (fileno==-1)
fileno = _7z_search_crc_match(_7z, m_crc, filename.cstr(), filename.len(), false, true);
if (fileno != -1)
{
m__7zfile = _7z;
m__7zlength = _7z->uncompressed_length;
// build a hash with just the CRC
m_hashes.reset();
m_hashes.add_crc(_7z->crc);
return (m_openflags & OPEN_FLAG_NO_PRELOAD) ? FILERR_NONE : load__7zped_file();
}
// close up the _7Z file and try the next level
_7z_file_close(_7z);
}
}
void emu_file::close()
{
// close files and free memory
if (m__7zfile != NULL)
_7z_file_close(m__7zfile);
m__7zfile = NULL;
if (m_zipfile != NULL)
zip_file_close(m_zipfile);
m_zipfile = NULL;
if (m_file != NULL)
core_fclose(m_file);
m_file = NULL;
m__7zdata.reset();
m_zipdata.reset();
if (m_remove_on_close)
osd_rmfile(m_fullpath);
m_remove_on_close = false;
// reset our hashes and path as well
m_hashes.reset();
m_fullpath.reset();
}
file_error emu_file::load__7zped_file()
{
assert(m_file == NULL);
assert(m__7zdata == NULL);
assert(m__7zfile != NULL);
// allocate some memory
m__7zdata = global_alloc_array(UINT8, m__7zlength);
// read the data into our buffer and return
_7z_error _7zerr = _7z_file_decompress(m__7zfile, m__7zdata, m__7zlength);
if (_7zerr != _7ZERR_NONE)
{
global_free(m__7zdata);
m__7zdata = NULL;
return FILERR_FAILURE;
}
// convert to RAM file
file_error filerr = core_fopen_ram(m__7zdata, m__7zlength, m_openflags, &m_file);
if (filerr != FILERR_NONE)
{
global_free(m__7zdata);
m__7zdata = NULL;
return FILERR_FAILURE;
}
// close out the _7Z file
_7z_file_close(m__7zfile);
m__7zfile = NULL;
return FILERR_NONE;
}
file_error emu_file::load__7zped_file()
{
assert(m_file == nullptr);
assert(m__7zdata.empty());
assert(m__7zfile != nullptr);
// allocate some memory
m__7zdata.resize(m__7zlength);
// read the data into our buffer and return
_7z_error _7zerr = _7z_file_decompress(m__7zfile, &m__7zdata[0], m__7zdata.size());
if (_7zerr != _7ZERR_NONE)
{
m__7zdata.clear();
return FILERR_FAILURE;
}
// convert to RAM file
file_error filerr = util::core_file::open_ram(&m__7zdata[0], m__7zdata.size(), m_openflags, m_file);
if (filerr != FILERR_NONE)
{
m__7zdata.clear();
return FILERR_FAILURE;
}
// close out the _7Z file
_7z_file_close(m__7zfile);
m__7zfile = nullptr;
return FILERR_NONE;
}
void emu_file::close()
{
// close files and free memory
if (m__7zfile != nullptr)
_7z_file_close(m__7zfile);
m__7zfile = nullptr;
if (m_zipfile != nullptr)
zip_file_close(m_zipfile);
m_zipfile = nullptr;
if (m_file != nullptr)
core_fclose(m_file);
m_file = nullptr;
m__7zdata.clear();
m_zipdata.clear();
if (m_remove_on_close)
osd_rmfile(m_fullpath.c_str());
m_remove_on_close = false;
// reset our hashes and path as well
m_hashes.reset();
m_fullpath.clear();
}
