/doc/efun/test_bit

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).

EXAMPLE

	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

clear_bit

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