HexCell[] WriteAscii(HexBytes hexBytes, HexSpan visibleBytesSpan, out VST.Span fullSpan, out VST.Span visibleSpan) {
Debug.Assert(showAscii);
cellList.Clear();
int fullStart = CurrentTextIndex;
int? visStart = null;
int? visEnd = null;
var pos = visibleBytesSpan.Start;
int cellPos = 0;
for (ulong i = 0; i < bytesPerLine; i++, pos++) {
int groupIndex = (cellPos / groupSizeInBytes) & 1;
HexBufferSpan bufferSpan;
int cellStart = CurrentTextIndex;
if (visibleBytesSpan.Contains(pos)) {
if (visStart == null)
visStart = CurrentTextIndex;
long index = (long)(pos - visibleBytesSpan.Start).ToUInt64();
int b = hexBytes.TryReadByte(index);
if (b < 0)
stringBuilder.Append('?');
else if (b < 0x20 || b > 0x7E)
stringBuilder.Append('.');
else
stringBuilder.Append((char)b);
bufferSpan = new HexBufferSpan(buffer, new HexSpan(pos, 1));
}
else {
if (visStart != null && visEnd == null)
visEnd = CurrentTextIndex;
stringBuilder.Append(' ');
bufferSpan = default(HexBufferSpan);
}
var cellSpan = VST.Span.FromBounds(cellStart, CurrentTextIndex);
var separatorSpan = new VST.Span(cellSpan.End, 0);
cellList.Add(new HexCell((int)i, groupIndex, bufferSpan, cellSpan, cellSpan, separatorSpan, cellSpan));
cellPos++;
}
if ((ulong)fullStart + bytesPerLine != (ulong)CurrentTextIndex)
throw new InvalidOperationException();
if (visStart != null && visEnd == null)
visEnd = CurrentTextIndex;
visibleSpan = visStart == null ? default(VST.Span) : VST.Span.FromBounds(visStart.Value, visEnd.Value);
fullSpan = VST.Span.FromBounds(fullStart, CurrentTextIndex);
if (AsciiSpan != fullSpan)
throw new InvalidOperationException();
return cellList.ToArray();
}
public override int FormatValue(StringBuilder dest, HexBytes hexBytes, long valueIndex, HexValueFormatterFlags flags) {
int b = hexBytes.TryReadByte(valueIndex);
if (b < 0)
return WriteInvalid(dest);
return WriteFormattedValue(dest, b.ToString(culture));
}
public override int FormatValue(StringBuilder dest, HexBytes hexBytes, long valueIndex, HexValueFormatterFlags flags) {
int b = hexBytes.TryReadByte(valueIndex);
if (b < 0)
return WriteInvalid(dest);
for (int i = 0; i < 8; i++, b <<= 1)
dest.Append((b & 0x80) != 0 ? '1' : '0');
return 0;
}
public override int FormatValue(StringBuilder dest, HexBytes hexBytes, long valueIndex, HexValueFormatterFlags flags) {
int b = hexBytes.TryReadByte(valueIndex);
if (b < 0)
return WriteInvalid(dest);
WriteHexByte(dest, flags, (byte)b);
return 0;
}