static bool FindUMXNameTableEntryImpl(TFile &file, const UMXFileHeader &fileHeader, const char *name)
{
if(!name)
{
return false;
}
std::size_t name_len = std::strlen(name);
if(name_len == 0)
{
return false;
}
bool result = false;
const FileReader::off_t oldpos = file.GetPosition();
if(file.Seek(fileHeader.nameOffset))
{
for(uint32 i = 0; i < fileHeader.nameCount && file.CanRead(4); i++)
{
if(fileHeader.packageVersion >= 64)
{
int32 length = ReadUMXIndexImpl(file);
if(length <= 0)
{
continue;
}
}
bool match = true;
std::size_t pos = 0;
char c = 0;
while((c = file.ReadUint8()) != 0)
{
c = mpt::ToLowerCaseAscii(c);
if(pos < name_len)
{
match = match && (c == name[pos]);
}
pos++;
}
if(pos != name_len)
{
match = false;
}
if(match)
{
result = true;
}
file.Skip(4); // Object flags
}
}
file.Seek(oldpos);
return result;
}
__int64 CDVDInputStreamStack::Seek(__int64 offset, int whence)
{
__int64 pos, len;
if (whence == SEEK_SET)
pos = offset;
else if(whence == SEEK_CUR)
pos = offset + m_pos;
else if(whence == SEEK_END)
pos = offset + m_length;
else
return -1;
len = 0;
for(TSegVec::iterator it = m_files.begin(); it != m_files.end(); it++)
{
if(len + it->length > pos)
{
TFile file = it->file;
__int64 file_pos = pos - len;
if(file->GetPosition() != file_pos)
{
if(file->Seek(file_pos, SEEK_SET) < 0)
return false;
}
m_file = file;
m_pos = pos;
m_eof = false;
return pos;
}
len += it->length;
}
return -1;
}
