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test_bit
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2001-04-06
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25 lines
SYNOPSIS
int test_bit(string str, int n)
DESCRIPTION
Return 0 or 1 of bit n was set in string str.
Each character contains 6 bits. So you can store a value
between 0 and 63 in one character (2^6=64). Starting character
is the blank " " which has the value 0. The first character in
the string is the one with the lowest bits (0-5).
EXAMPLES
test_bit("_",5);
Returns 1 because "_" stands for the number 63 and therefore
the 6th bit is set.
test_bit(" ",3);
Returns 0 because " " stands for 0 and no bit is set.
SEE ALSO
set_bit(E), clear_bit(E), last_bit(E), next_bit(E), count_bits(E),
and_bits(E), or_bits(E), xor_bits(E), invert_bits(E)