size_t VirtualDiscFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size) {
EntryMap::iterator iter = entries.find(handle);
if (iter != entries.end())
{
// it's the whole iso... it could reference any of the files on the disc.
// For now let's just open and close the files on demand. Can certainly be done
// better though
if (iter->second.type == VFILETYPE_ISO)
{
int fileIndex = getFileListIndex(iter->second.curOffset,size*2048,true);
if (fileIndex == -1)
{
ERROR_LOG(FILESYS,"VirtualDiscFileSystem: Reading from unknown address in %08x at %08llx", handle, iter->second.curOffset);
return 0;
}
OpenFileEntry temp;
if (fileList[fileIndex].handler != NULL) {
temp.handler = fileList[fileIndex].handler;
}
bool success = temp.Open(basePath, fileList[fileIndex].fileName, FILEACCESS_READ);
if (!success)
{
ERROR_LOG(FILESYS,"VirtualDiscFileSystem: Error opening file %s", fileList[fileIndex].fileName.c_str());
return 0;
}
u32 startOffset = (iter->second.curOffset-fileList[fileIndex].firstBlock)*2048;
size_t bytesRead;
temp.Seek(startOffset, FILEMOVE_BEGIN);
u32 remainingSize = fileList[fileIndex].totalSize-startOffset;
if (remainingSize < size * 2048)
{
// the file doesn't fill the whole last sector
// read what's there and zero fill the rest like on a real disc
bytesRead = temp.Read(pointer, remainingSize);
memset(&pointer[bytesRead], 0, size * 2048 - bytesRead);
} else {
bytesRead = temp.Read(pointer, size * 2048);
}
temp.Close();
iter->second.curOffset += size;
return size;
}
size_t bytesRead = iter->second.Read(pointer, size);
iter->second.curOffset += bytesRead;
return bytesRead;
} else {
//This shouldn't happen...
ERROR_LOG(FILESYS,"VirtualDiscFileSystem: Cannot read file that hasn't been opened: %08x", handle);
return 0;
}
}
size_t VirtualDiscFileSystem::ReadFile(u32 handle, u8 *pointer, s64 size, int &usec) {
EntryMap::iterator iter = entries.find(handle);
if (iter != entries.end()) {
if (size < 0) {
ERROR_LOG_REPORT(FILESYS, "Invalid read for %lld bytes from virtual umd", size);
return 0;
}
// it's the whole iso... it could reference any of the files on the disc.
// For now let's just open and close the files on demand. Can certainly be done
// better though
if (iter->second.type == VFILETYPE_ISO)
{
int fileIndex = getFileListIndex(iter->second.curOffset,size*2048,true);
if (fileIndex == -1)
{
ERROR_LOG(FILESYS,"VirtualDiscFileSystem: Reading from unknown address in %08x at %08llx", handle, iter->second.curOffset);
return 0;
}
OpenFileEntry temp;
if (fileList[fileIndex].handler != NULL) {
temp.handler = fileList[fileIndex].handler;
}
bool success = temp.Open(basePath, fileList[fileIndex].fileName, FILEACCESS_READ);
if (!success)
{
ERROR_LOG(FILESYS,"VirtualDiscFileSystem: Error opening file %s", fileList[fileIndex].fileName.c_str());
return 0;
}
u32 startOffset = (iter->second.curOffset-fileList[fileIndex].firstBlock)*2048;
size_t bytesRead;
temp.Seek(startOffset, FILEMOVE_BEGIN);
u32 remainingSize = fileList[fileIndex].totalSize-startOffset;
if (remainingSize < size * 2048)
{
// the file doesn't fill the whole last sector
// read what's there and zero fill the rest like on a real disc
bytesRead = temp.Read(pointer, remainingSize);
memset(&pointer[bytesRead], 0, size * 2048 - bytesRead);
} else {
bytesRead = temp.Read(pointer, size * 2048);
}
temp.Close();
iter->second.curOffset += size;
// TODO: This probably isn't enough...
if (abs((int)lastReadBlock_ - (int)iter->second.curOffset) > 100) {
// This is an estimate, sometimes it takes 1+ seconds, but it definitely takes time.
usec = 100000;
}
lastReadBlock_ = iter->second.curOffset;
return size;
}
if (iter->second.type == VFILETYPE_LBN && iter->second.curOffset + size > iter->second.size) {
// Clamp to the remaining size, but read what we can.
const s64 newSize = iter->second.size - iter->second.curOffset;
WARN_LOG(FILESYS, "VirtualDiscFileSystem: Reading beyond end of file, clamping size %lld to %lld", size, newSize);
size = newSize;
}
size_t bytesRead = iter->second.Read(pointer, size);
iter->second.curOffset += bytesRead;
return bytesRead;
} else {
//This shouldn't happen...
ERROR_LOG(FILESYS,"VirtualDiscFileSystem: Cannot read file that hasn't been opened: %08x", handle);
return 0;
}
}
