public static void PrintRestOfStream(ref FileStream stream, string pattern, int buf, ref int count, ref StatusOfFiles status, bool side, bool text)
{
count++;
while (count < N || buf != EOF)
{
buf = stream.ReadByte();
if (buf != EOF)
{
Console.Write(pattern, buf);
}
count++;
}
status = StatusOfFiles.BothEof;
}
public static long SkipSame(ref FileStream stream1, ref FileStream stream2, out int a, out int b, ref StatusOfFiles status)
{
do
{
a = stream1.ReadByte();
b = stream2.ReadByte();
} while (a == b && a != EOF && b != EOF);
if (a == EOF && b == EOF)
{
status = StatusOfFiles.BothEof;
}
else if (a == EOF)
{
status = StatusOfFiles.FirstEof;
return(stream2.Position);
}
else if (b == EOF)
{
status = StatusOfFiles.SecondEof;
return(stream1.Position);
}
return(stream1.Position);
}
public static bool CheckNext(ref FileStream stream1, ref FileStream stream2, out int a, out int b, ref StatusOfFiles status)
{
a = stream1.ReadByte();
b = stream2.ReadByte();
if (a == EOF)
{
status = StatusOfFiles.FirstEof;
}
if (b == EOF)
{
status = StatusOfFiles.SecondEof;
}
return(a == b ? false : true);
}
static void Main(string[] args)
{
StatusOfFiles status = StatusOfFiles.NoneEof;
if (args.Length < 2)
{
Console.WriteLine("Program requires at least 2 arguments");
return;
}
FileStream stream1 = new FileStream(args[0], FileMode.Open);
FileStream stream2 = new FileStream(args[1], FileMode.Open);
if (args.Length >= 3)
{
N = Convert.ToInt64(args[3]);
}
else
{
N = stream1.Length;
if (stream2.Length > N)
{
N = stream2.Length;
}
}
bool brief = false, text = false, side = false, isDiff = false;
Parser.Default.ParseArguments <Options>(args).WithParsed <Options>(opts => {
if (opts.Length > 0)
{
Console.WriteLine("Parameter --length was set and equals {0}", opts.Length);
N = opts.Length;
}
if (opts.Text)
{
Console.WriteLine("Parameter --text was set");
text = true;
}
if (opts.Brief)
{
Console.WriteLine("Parameter --brief was set");
brief = true;
}
if (opts.Side_by_side)
{
Console.WriteLine("Parameter --side-by-side was set");
side = true;
}
});
int byte1 = 0, byte2 = 0, count = 0;
long position = 0;
while (status != StatusOfFiles.BothEof && count < N)
{
bool offset = false;
position = SkipSame(ref stream1, ref stream2, out byte1, out byte2, ref status);
if (status == StatusOfFiles.NoneEof)
{
if (!isDiff)
{
isDiff = true;
}
if (!brief)
{
Console.Write("0x{0:x8}: ", position - 1);
offset = true;
PrintOne(byte1, byte2, side, text);
}
count++;
while (CheckNext(ref stream1, ref stream2, out byte1, out byte2, ref status) && status == StatusOfFiles.NoneEof)
{
position++;
if (!brief)
{
PrintOne(byte1, byte2, side, text);
}
count++;
}
}
if (status == StatusOfFiles.FirstEof || status == StatusOfFiles.SecondEof)
{
if (!offset && !brief && status != StatusOfFiles.BothEof)
{
Console.Write("0x{0:x8}: ", position - 1);
}
if (!isDiff)
{
isDiff = true;
}
bool isFirst = false;
if (status == StatusOfFiles.FirstEof)
{
isFirst = true;
}
if (!brief)
{
if (status == StatusOfFiles.SecondEof)
{
Console.Write("0x{0:x}(<EOF>) ", byte1);
PrintRestOfStream(ref stream1, "0x{0:x} ", byte1, ref count, ref status, side, text);
}
else
{
Console.Write("<EOF>(0x{0:x}) ", byte2);
PrintRestOfStream(ref stream2, "(0x{0:x}) ", byte2, ref count, ref status, side, text);
}
}
}
if (!brief)
{
Console.WriteLine();
}
}
if (!isDiff)
{
Console.WriteLine("Files are identical");
}
else if (brief && isDiff)
{
Console.WriteLine("Files are not identical");
}
}