I have a file with data like:
1F B8 08 08 00 00 00 00
I am reading it into an int, casting it to a character, and storing it in an array.
int n, i = 0;
char c;
while (ifs >> std::hex >> n) {
c = static_cast<unsigned char>(n);
r[i++] = c;
}
works fine. How do I go about doing this if there is no white space in the data, i.e.
1FB8080800000000
The above code just fills n to maxint and exits. I can create something using getc or the like but I'd like the C++ code to handle both cases.
You could read the numbers as strings and use std::setw
to limit the number of characters read. Then use std::stoi
to convert to integers:
std::string ns;
while (ifs >> std::setw(2) >> ns) {
r[i++] = static_cast<unsigned char>(std::stoi(ns, nullptr, 16));
}
Will work with both the space-delimited and non space-delimited input.