bool check(const char *text) { char c; while (c = *text++) { if ((c & 0x80) && ((*text) & 0x80)) { return true;
I have uint64_t variable with some value (for example 0x700a06fffff48517). I want to get char with the first bit of each byte in the uint (so from 0x700a06fffff
This is a problem from competitive programmer's handbook: We are given the prices of k products over n days, and we want to buy each product exactly once. Howev
Is there a quick bit operation to implement msb_equal: a function to check if two numbers have the same most significant bit? For example, 0b000100 and 0b0001
I need to switch the first half and the second half of a byte: Make 0011 0101 to 0101 0011 for example I thought it might work this way: For example, i have 10
I was studying the x86_64 assembly for the following function: /// Returns the greatest power of two less than or equal to `self`, or 0 otherwise. pub const fn
I need to encode a 24 bit integer into the end of 32 bit int. (the first byte contains other data, the other three are empty for use by the 24 bit int) I alr
Background For a long time, gcc has been providing a number of builtin bit-twiddling functions, in particular the number of trailing and leading 0-bits (also f
When bitwise & operation is greater or equal to bitwise ^ operation? For example, 4&7 >= 4^7 is true. How do we know when it will be true? The one wa
Maybe you can help me with the following problem that can help me speed a memory manager I am thinking of (I am not sure a solution exists – I did not fin
I recently came across this question on Leetcode and figured out a solution that I need some clarification with: Given an array of integers, every element a
I am reading K&R book for c language and in section 2.10 they give the following example: /*bitcount: count 1 bits in x*/ int bitcount(unsigned x) { in
I watched a youtube video on the Top 10 Craziest Assembly Language Instructions and some of these instructions have no obvious application to me. What's the poi
How to find the length of the longest consecutive bit string(either 1 or 0)? 00000000 11110000 00000000 00000000 -> If it is 0 then length will be 20 111