public Pointer requestFreeSpace(int length)
{
ReadOnlyCollection<Tuple<int, int>> space = freeSpace.getList();
List<Tuple<int, int>> space_mutable = new List<Tuple<int, int>>(space);
space_mutable.Sort(delegate(Tuple<int, int> first, Tuple<int, int> second)
{
int firstLen = first.Item2 - first.Item1;
int secondLen = second.Item2 - second.Item1;
if (firstLen == secondLen)
{ return 0; }
else if (firstLen > secondLen)
{ return 1; }
else
{ return -1; }
}); //sort smallest to largest by length
for(int i=0; i<space_mutable.Count; i++)
{
int len = space_mutable[i].Item2 - space_mutable[i].Item1;
if(len > length)
{
Pointer start = new Pointer(space_mutable[i].Item1, 0x08000000);
this.markAllocated(space_mutable[i].Item1, length);
return start;
}
}
//expand ROM
Pointer ret = new Pointer(ROMSize);
ROMSize += length;
return ret;
}
//same
public byte[] writePointer(int offset, Pointer poin)
{
return owner.requestWrite(offset, poin.underlyingData);
}
private Pointer? getTableOffset(string iden)
{
List<Tuple<int, byte[]>> tables_raw = mainTable.data;
int i;
string current;
for (i = 0; i < tables_raw.Count; i++)
{
Pointer tableOffs = new Pointer(tables_raw[i].Item2);
current = metadataStream.ReadASCII(tableOffs.value, IDENTIFIER_LENGTH);
if (current == iden)
return tableOffs;
}
return null;
}
public void freePointer(Pointer poin)
{
owner.free(poin.underlyingData);
}
//private List<Metadata> myData;
//List<MetadataTable> tables; //maybe in the works for more efficient refactoring
public MetadataManager(string filePath)
{
this.metadataPath = filePath;
if (!File.Exists(filePath))
{
metadataStream = File.Open(filePath, FileMode.CreateNew);
initializeMetadata(metadataStream);
}
else
{ metadataStream = File.Open(filePath, FileMode.Open); }
tables = new Dictionary<string, Metadata>();
//myData = new List<Metadata>();
mainTable = readMetadataTable(metadataStream, 0);//new Metadata();
//mainTable.info = readMetadataTableInfo(metadataStream, 0);
int numTables = mainTable.info.numEntries;
int offs = mainTable.info.tableOffset.value;
//int offs = 4;
for (int i = 0; i < numTables; i++)
{
offs += 4; //ignore length data; constant length
Pointer tableOffs = new Pointer(metadataStream.ReadData(offs,4)); //Get the pointer to the data table
Metadata temp = readMetadataTable(metadataStream, tableOffs.value);
offs += 4;
string identifier = metadataStream.ReadASCII(tableOffs.value, IDENTIFIER_LENGTH); //read the identifier of the data table
tables.Add(identifier, temp);
//myData.Add(temp);
}
metadataStream.Close();
}
