DESCRIPTION¶
str1 and str2 are both bitstrings. The result of the function is a bitstring with the binary-xor of str1 and str2, ie. a string in which a bit is set only if the corresponding bits in either str1 or str2 (but not both) is set.
USAGE¶
The below example demonstrates how xor_bits(E) cancels out the bit common to s1 and s2, but retains bits present only in one string:
string s1, s2, s3;
s1 = set_bit("", 3);
s1 = set_bit(s1, 15); // s1 is "( (", bits 3 and 15
s2 = set_bit("", 3);
s2 = set_bit(s2, 4); // s2 is "8", bits 3 and 4
s3 = xor_bits(s1, s2); // s3 is "0 (", bits 4 and 15