First remember that machine words are of fixed size. Say 4, and that your input is: Then pushing everything one position to the left gives: Question what to put as X? with a shift put 0 with rotate put a Now push everything one position to the right gives: Question what to put as X? … Read more
0x01 is the least significant bit set, hence the decimal value is 1. 0x80 is the most significant bit of an 8-bit byte set. If it is stored in a signed char (on a machine that uses 2’s-complement notation – as most machines you are likely to come across will), it is the most negative … Read more
Suppose I was trying to create a mask in C for bitwise operations, like What does the x mean? I see a lot of numbers written with that 0x format and I don’t understand why and have been unable to find an explanation that really makes sense to me, maybe I’m not searching the right … Read more
| performs a bitwise OR on the two operands it is passed. For example, If you look at the underlying bits for 0x0A and 0x50, they are 0b00001010 and 0b01010000 respectively. When combined with the OR operator the result in b is 0b01011010, or 0x5A in hexadecimal. |= is analogous to operators like += and -= in that it will perform a bitwise OR on the two operands then store the result in … Read more
I am fairly new to C programming, and I encountered bit masking. Can someone explain to me the general concept and function of bit masking? Examples are much appreciated.