private static void GetName(SubDirectory dir, int i, char *outName)
{
FatDirEntry entry = dir.DirEntries[i];
/**
* Calculate length and offsets
*/
string nameStr = Util.CharPtrToString(entry.Name);
int fnLength = nameStr.IndexOf(' ');
if (fnLength > 8 || fnLength == -1)
{
fnLength = 8;
}
int offset = 0;
for (int z = 0; z < fnLength; z++)
{
outName[offset++] = entry.Name[z];
}
// Is it a file?
if ((dir.DirEntries[i].Attribs & ATTRIB_SUBDIR) == 0)
{
nameStr = Util.CharPtrToString(entry.Name + 8);
int extLength = nameStr.IndexOf(' ');
if (extLength == -1)
{
extLength = 3;
}
if (extLength != 0)
{
outName[offset++] = '.';
for (int z = 0; z < extLength; z++)
{
outName[offset++] = entry.Name[z + 8];
}
}
}
outName[offset] = '\0';
for (int z = 0; z < offset; z++)
{
outName[z] = String.ToLower(outName[z]);
}
}
/// <summary>
/// Find node in directory
/// </summary>
/// <param name="cluster">Cluster number</param>
/// <param name="testFor">Compare string</param>
/// <returns></returns>
public Node FindFileInDirectory(uint cluster, char *testFor)
{
SubDirectory dir = readDirectory(cluster);
for (int i = 0; i < dir.Length; i++)
{
FatDirEntry entry = dir.DirEntries[i];
if (entry.Name[0] == 0 || entry.Name[0] == 0xE5 || entry.Attribs == 0xF || (entry.Attribs & 0x08) > 0)
{
continue;
}
if (Memory.Compare(testFor, entry.Name, 11))
{
FatDirEntry *entr = (FatDirEntry *)Heap.Alloc(sizeof(FatDirEntry));
Memory.Memcpy(entr, dir.DirEntries + i, sizeof(FatDirEntry));
return(CreateNode(entr, cluster, (uint)i));
}
}
return(null);
}
/// <summary>
/// Filesystem read directory implementation
/// </summary>
/// <param name="node"></param>
/// <param name="index"></param>
/// <returns></returns>
private static DirEntry *readDirImpl(Node node, uint index)
{
int j = 0;
/**
* Find cluster number if not root directory
*/
uint cluster = 0xFFFFFFFF;
Fat16Cookie cookie = (Fat16Cookie)node.Cookie;
Fat16 fat = cookie.FAT16;
if (cookie.DirEntry != null)
{
FatDirEntry *entry = cookie.DirEntry;
cluster = entry->ClusterNumberLo;
}
/**
* Read directory entries
*/
SubDirectory dir = fat.readDirectory(cluster);
for (int i = 0; i < dir.Length; i++)
{
FatDirEntry entry = dir.DirEntries[i];
/**
* Correct attributes?
*/
if (entry.Name[0] == 0 || entry.Name[0] == (char)0xE5 || entry.Attribs == 0xF || (entry.Attribs & 0x08) > 0)
{
continue;
}
/**
* Do we need to search further?
*/
if (j >= index)
{
DirEntry *outDir = (DirEntry *)Heap.Alloc(sizeof(DirEntry));
outDir->Reclen = (ushort)sizeof(DirEntry);
GetName(dir, i, outDir->Name);
/**
* Directory or file?
*/
if ((dir.DirEntries[i].Attribs & ATTRIB_SUBDIR) == 0)
{
outDir->Type = (byte)DT_Type.DT_REG;
}
else
{
outDir->Type = (byte)DT_Type.DT_DIR;
}
return(outDir);
}
j++;
}
return(null);
}