public HexFileReader(string fileName)
{
if (!File.Exists(fileName))
{
throw new ArgumentException(string.Format("File {0} does not exist!", fileName));
}
memorySize = 0;
using (Stream stream = new FileStream(fileName, FileMode.Open))
{
StreamReader reader = new StreamReader(stream);
while (reader.Peek() >= 0)
{
string hexRecordLine = reader.ReadLine();
//var hexRecord = HexFileLineParser.ParseLine(hexRecordLine);
IntelHexRecord hexRecord = HexFileLineParser.ParseLine(hexRecordLine);
if (hexRecord != null)
{
switch (hexRecord.RecordType)
{
case RecordType.Data:
{
memorySize += hexRecord.ByteCount;
break;
}
}
}
}
}
Initialize(File.ReadLines(fileName), memorySize);
}
private static MemoryBlock ReadHexFile(IEnumerable <string> hexRecordLines, int memorySize)
{
var result = new MemoryBlock(memorySize);
var baseAddress = 0;
var encounteredEndOfFile = false;
foreach (var hexRecordLine in hexRecordLines)
{
var hexRecord = HexFileLineParser.ParseLine(hexRecordLine);
if (hexRecord != null)
{
switch (hexRecord.RecordType)
{
case RecordType.Data:
{
var nextAddress = hexRecord.Address + baseAddress;
for (var i = 0; i < hexRecord.ByteCount; i++)
{
if (nextAddress + i > memorySize)
{
throw new IOException(
string.Format("Trying to write to position {0} outside of memory boundaries ({1})!",
nextAddress + i, memorySize));
}
var cell = result.Cells[nextAddress + i];
cell.Value = hexRecord.Bytes[i];
cell.Modified = true;
}
break;
}
case RecordType.EndOfFile:
{
hexRecord.Assert(rec => rec.Address == 0, "Address should equal zero in EOF.");
hexRecord.Assert(rec => rec.ByteCount == 0, "Byte count should be zero in EOF.");
hexRecord.Assert(rec => rec.Bytes.Length == 0, "Number of bytes should be zero for EOF.");
hexRecord.Assert(rec => rec.CheckSum == 0xff, "Checksum should be 0xff for EOF.");
encounteredEndOfFile = true;
break;
}
case RecordType.ExtendedSegmentAddress:
{
hexRecord.Assert(rec => rec.ByteCount == 2, "Byte count should be 2.");
baseAddress = (hexRecord.Bytes[0] << 8 | hexRecord.Bytes[1]) << 4;
break;
}
case RecordType.ExtendedLinearAddress:
{
hexRecord.Assert(rec => rec.ByteCount == 2, "Byte count should be 2.");
baseAddress = (hexRecord.Bytes[0] << 8 | hexRecord.Bytes[1]) << 16;
break;
}
case RecordType.StartSegmentAddress:
{
hexRecord.Assert(rec => rec.ByteCount == 4, "Byte count should be 4.");
hexRecord.Assert(rec => rec.Address == 0, "Address should be zero.");
result.CS = (ushort)(hexRecord.Bytes[0] << 8 + hexRecord.Bytes[1]);
result.IP = (ushort)(hexRecord.Bytes[2] << 8 + hexRecord.Bytes[3]);
break;
}
case RecordType.StartLinearAddress:
hexRecord.Assert(rec => rec.ByteCount == 4, "Byte count should be 4.");
hexRecord.Assert(rec => rec.Address == 0, "Address should be zero.");
result.EIP =
(uint)(hexRecord.Bytes[0] << 24) + (uint)(hexRecord.Bytes[1] << 16)
+ (uint)(hexRecord.Bytes[2] << 8) + hexRecord.Bytes[3];
break;
}
}
}
if (!encounteredEndOfFile)
{
throw new IOException("No EndOfFile marker found!");
}
return(result);
}
