Bitwise Operations

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Basic bit manipulation:

bit position
7	6	5	4	3	2	1	0

is n-th bit set:

if (x & (1<<n)) {
  //n-th bit is set
}

set n-th bit:

y = x | (1<<n)

clear n-th bit:

y = x & ~(1<<n)

toggle n-th bit:

y = x ^ (1<<n)

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Resources:

• Peteris Krumins' blog
• Sean Eron Anderson's Bit Twiddling Hacks

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