I have been assigned to convert a C++ app to C#.
I want to convert the following code in C# where rate_buff is a double[3,9876] two dimensional array.
if ((fread((char*) rate_buff,
(size_t) record_size,
(size_t) record_count,
stream)) == (size_t) record_count)
If I correctly guessed your requirements, this is what you want:
int record_size = 9876;
int record_count = 3;
double[,] rate_buff = new double[record_count, record_size];
// open the file
using (Stream stream = File.OpenRead("some file path"))
{
// create byte buffer for stream reading that is record_size * sizeof(double) in bytes
byte[] buffer = new byte[record_size * sizeof(double)];
for (int i = 0; i < record_count; i++)
{
// read one record
if (stream.Read(buffer, 0, buffer.Length) != buffer.Length)
throw new InvalidDataException();
// copy the doubles out of the byte buffer into the two dimensional array
// note this assumes machine-endian byte order
for (int j = 0; j < record_size; j++)
rate_buff[i, j] = BitConverter.ToDouble(buffer, j * sizeof(double));
}
}
Or more concisely with a BinaryReader:
int record_size = 9876;
int record_count = 3;
double[,] rate_buff = new double[record_count, record_size];
// open the file
using (BinaryReader reader = new BinaryReader(File.OpenRead("some file path")))
{
for (int i = 0; i < record_count; i++)
{
// read the doubles out of the byte buffer into the two dimensional array
// note this assumes machine-endian byte order
for (int j = 0; j < record_size; j++)
rate_buff[i, j] = reader.ReadDouble();
}
}
