Byte order conversion in cpp

Question

I am trying to solve a problem. I have a char * SERIAL_HEX = 5F6D1F7F But my code is expecting the SERIAL_HEX in reverse order. Like SERIAL_HEX = 7F1F6D5F

So its reversing the hex digits..How can i achieve this in c++ ? Any pointers will help me! Thanks,

What have you tried ? Did you tried to just [reverse hex string](http://stackoverflow.com/questions/784417/reversing-a-string-in-c) ? — Agnius Vasiliauskas, May 30 '12 at 06:24
yes thats what i want to do. reverse the hex string. Currently the hex string stores the serial number of certificate. and i want to reverse this serial number as in the example i gave earlier — user839917, May 30 '12 at 06:26

score 1 · Answer 1 · answered May 30 '12 at 06:55

1

You have (at least) 2 possibilities:

convert each character pair to a byte, reverse the resulting string with std::reverse() and convert each byte back to its hex-representation
swap each character pair with the one counting from the end.

answered May 30 '12 at 06:55

stefaanv

14,072
2
31
53

Byte order conversion in cpp

1 Answers1