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August 7, 2024 14:05
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bitmask logic
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| #include <stdio.h> | |
| /* | |
| Common bitmask operators and logic: | |
| 1. AND (&) | |
| Purpose: Clear (set to 0) specific bits or only show bits that are already set. | |
| Example: result = value & mask; | |
| Keeps bits that are 1 in both value and mask. | |
| 2. OR (|) | |
| Purpose: Set specific bits to 1. | |
| Example: result = value | mask; | |
| Sets bits to 1 where the mask has bits set to 1. | |
| 3. XOR (^) | |
| Purpose: Toggle specific bits. | |
| Example: result = value ^ mask; | |
| Toggles bits where the mask has bits set to 1. | |
| 4. NOT (~) | |
| Purpose: Invert all bits. | |
| Example: result = ~value; | |
| Flips all bits in value. | |
| */ | |
| int main() { | |
| unsigned char value = 0b10101111; // Example value | |
| unsigned char mask = 0b00001100; // Example mask | |
| // Clearing specific bits | |
| unsigned char clear_bits = value & ~mask; | |
| // Setting specific bits | |
| unsigned char set_bits = value | mask; | |
| // Toggling specific bits | |
| unsigned char toggle_bits = value ^ mask; | |
| // Showing only set bits | |
| unsigned char show_set_bits = value & mask; | |
| printf("Original value: 0b%08b\n", value); | |
| printf("Mask: 0b%08b\n", mask); | |
| printf("Cleared bits: 0b%08b\n", clear_bits); | |
| printf("Set bits: 0b%08b\n", set_bits); | |
| printf("Toggled bits: 0b%08b\n", toggle_bits); | |
| printf("Show only set bits: 0b%08b\n", show_set_bits); | |
| return 0; | |
| } | |
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