/// <summary>
/// Writes data into an existing (single) segment.
/// </summary>
/// <param name="address">The address to write to.</param>
/// <param name="bytes">The bytes to write.</param>
internal void SetData(ModuleAddress address, byte[] bytes)
{
var segment = GetSegment(address);
segment.SetData(address, bytes);
DataChanged?.Invoke(this, new ModuleDataChangedEventArgs(segment));
}
public DataSegment(ModuleAddress start, byte[] data)
{
if (data.Length > 0xff)
{
throw new ArgumentOutOfRangeException("Data segments cannot (currently) be more than 255 bytes long");
}
(Start, Data, End) = (start, data, start + data.Length);
}
public byte[] GetData(ModuleAddress address, int size)
{
// Normal "we don't really mean it" sizing.
if (size >= 0x100)
{
size -= 0x80;
}
var segment = GetSegment(address);
byte[] ret = new byte[size];
for (int i = 0; i < size; i++)
{
// This handles overflow from 0x7f to 0x100 appropriately.
ret[i] = segment[address + i];
}
return(ret);
}
public void Populate(ModuleAddress address, byte[] data)
{
if (data.Length >= 0x100)
{
throw new ArgumentException("Data size must be less than 0x100");
}
var segment = new DataSegment(address, data);
lock (sync)
{
int index = segments.BinarySearch(segment, DataSegment.AddressComparer);
if (index >= 0)
{
throw new ArgumentException($"Segment already exists for address {address}");
}
segments.Insert(~index, segment);
}
DataChanged?.Invoke(this, new ModuleDataChangedEventArgs(segment));
}
public DataSegment?GetSegmentOrNull(ModuleAddress address)
{
lock (sync)
{
// Binary search on start addresses, expecting not to find an exact match necessarily.
// TODO: This shouldn't be necessary, surely
int lowInc = 0;
int highExc = segments.Count;
while (lowInc < highExc)
{
int candidate = (lowInc + highExc) / 2;
ModuleAddress candidateAddress = segments[candidate].Start;
var comparison = candidateAddress.CompareTo(address);
// Exact match! Great, can exit immediately.
if (comparison == 0)
{
return(segments[candidate]);
}
else if (comparison < 0)
{
lowInc = candidate + 1;
}
else
{
highExc = candidate;
}
}
// No exact match, but it's possible (likely!) that we found a match in "lowInc-1", with
// a start address greater than the target, but which contains the target.
if (lowInc > 0)
{
var segment = segments[lowInc - 1];
if (segment.Contains(address))
{
return(segment);
}
}
return(null);
}
}
public byte this[ModuleAddress address]
{
get => Data[GetOffset(address)];
public bool Contains(ModuleAddress other) => other.CompareTo(Start) >= 0 && other.CompareTo(End) < 0;
public byte GetAddressValue(ModuleAddress address) => GetSegment(address)[address];
public DataSegment GetSegment(ModuleAddress address) =>
GetSegmentOrNull(address) ?? throw new ArgumentException($"No data found for {address}");
public bool HasData(ModuleAddress address) => GetSegmentOrNull(address) != null;