I have read from memory a 6 byte unsigned char
array.
The endianess is Big Endian here.
Now I want to assign the value that is stored in the array to an integer variable. I assume this has to be long long
since it must contain up to 6 bytes.
At the moment I am assigning it this way:
unsigned char aFoo[6];
long long nBar;
// read values to aFoo[]...
// aFoo[0]: 0x00
// aFoo[1]: 0x00
// aFoo[2]: 0x00
// aFoo[3]: 0x00
// aFoo[4]: 0x26
// aFoo[5]: 0x8e
nBar = (aFoo[0] << 64) + (aFoo[1] << 32) +(aFoo[2] << 24) + (aFoo[3] << 16) + (aFoo[4] << 8) + (aFoo[5]);
A memcpy approach would be neat, but when I do this
memcpy(&nBar, &aFoo, 6);
the 6 bytes are being copied to the long long
from the start and thus have padding zeros at the end.
Is there a better way than my assignment with the shifting?