用于将十六进制字符串转换为字符数组的单行

Question

This is probably a duplicate of hex string to unsigned char but with different input

I want to read hex strings from txt file and tried to save it in array

FF FF FF FF FF FF FF FF
0 3F 0 0 3 E0 0 1
7F 0 43 1 92 FF 0 AA

Expected output:

unsigned char array[3][8] = {
  0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
  0x0, 0x3F, 0x0, 0x0, 0x3, 0xE0, 0x0, 0x1,
  0x7F, 0x0, 0x43, 0x1, 0x92, 0xFF, 0x0, 0xAA
};

Note: Line ending is important. Some lines representing less than 8 bytes

I could show you 50 lines of code but that is completely garbage. My question isn't there any one-liner std::something to achieve this?

Answer 1

You can stream it:

std::ifstream file(…);
std::vector<char> buf;
while(file)
{
    int c;
    file >> std::hex >> c;
    buf.push_back(c);
}