public static List <String> Read(FileReader reader, FilePointerDelegate filepointerfunc, Int32 recordcount)
{
Assert.IsNotNull(reader, nameof(reader));
Assert.IsNotNull(filepointerfunc, nameof(filepointerfunc));
Assert.Int32NotNegative(recordcount, nameof(recordcount));
var output = new List <String>();
var filepointers = new List <FilePointer>();
var stringpointers = new List <FilePointer>();
filepointerfunc(reader, recordcount, filepointers, stringpointers);
foreach (var pointer in stringpointers)
{
if (pointer.Value > reader.Length)
{
continue;
}
reader.Position = pointer.Value;
var str = reader.ReadString();
output.Add(str);
}
return(output);
}
public TextFileDescription(String filename, FilePointerDelegate @delegate)
{
Assert.IsValidString(filename, nameof(filename));
Assert.IsNotNull(@delegate, nameof(@delegate));
FileName = filename;
FilePointerDelegate = @delegate;
}
public TextFileDescription(String filename, FilePointerDelegate @delegate, Int32 recordcount)
{
Assert.IsValidString(filename, nameof(filename));
Assert.IsNotNull(@delegate, nameof(@delegate));
Assert.Int32NotNegative(recordcount, nameof(recordcount));
FileName = filename;
FilePointerDelegate = @delegate;
RecordCount = recordcount;
}
public static List <String> Read(FileReader reader, FilePointerDelegate filepointerfunc)
{
Assert.IsNotNull(reader, nameof(reader));
Assert.IsNotNull(filepointerfunc, nameof(filepointerfunc));
var output = new List <String>();
var filepointers = new List <FilePointer>();
var stringpointers = new List <FilePointer>();
filepointerfunc(reader, filepointers, stringpointers);
foreach (var pointer in stringpointers)
{
reader.Position = pointer.Value;
var str = reader.ReadString();
output.Add(str);
}
return(output);
}
public static Byte[] Write(FileReader reader, FilePointerDelegate filepointerfunc, List <String> lines)
{
Assert.IsNotNull(reader, nameof(reader));
Assert.IsNotNull(filepointerfunc, nameof(filepointerfunc));
Assert.IsNotNull(lines, nameof(lines));
var output = new List <Byte>();
reader.Position = 0;
output.AddRange(reader.ReadBytes((Int32)reader.Length));
var filepointers = new List <FilePointer>();
var stringpointers = new List <FilePointer>();
filepointerfunc(reader, filepointers, stringpointers);
var filepointermap = filepointers.ToDictionary(x => x.Position, x => x);
var filepointermapkeys = filepointermap.Keys.ToList();
var lineindex = 0;
foreach (var stringpointer in stringpointers)
{
reader.Position = stringpointer.Value;
var oldstr = reader.ReadString();
var newstr = lines[lineindex++];
if (newstr == "")
{
continue;
}
var oldstrbytes = reader.Encoding.GetBytes(oldstr);
var newstrbytes = reader.Encoding.GetBytes(newstr);
var sizedifference = newstrbytes.Length - oldstrbytes.Length;
var saved = filepointermap[stringpointer.Position];
foreach (var key in filepointermapkeys)
{
filepointermap[key] = filepointermap[key].Offset(saved.Value, sizedifference);
}
output.RemoveRange((Int32)saved.Value, oldstrbytes.Length);
output.InsertRange((Int32)saved.Value, newstrbytes);
}
foreach (var pointer in filepointermap.Values)
{
if (pointer.Size == FilePointerSize.Size16)
{
output[(Int32)(pointer.Position + 0)] = (Byte)((pointer.Value & 0x00FF) >> 00);
output[(Int32)(pointer.Position + 1)] = (Byte)((pointer.Value & 0xFF00) >> 08);
}
if (pointer.Size == FilePointerSize.Size32)
{
output[(Int32)(pointer.Position + 0)] = (Byte)((pointer.Value & 0x000000FF) >> 00);
output[(Int32)(pointer.Position + 1)] = (Byte)((pointer.Value & 0x0000FF00) >> 08);
output[(Int32)(pointer.Position + 2)] = (Byte)((pointer.Value & 0x00FF0000) >> 16);
output[(Int32)(pointer.Position + 3)] = (Byte)((pointer.Value & 0xFF000000) >> 24);
}
}
return(output.ToArray());
}
