Data update

Task/Canonicalize-CIDR/MATLAB/canonicalize-cidr.m

@@ -0,0 +1,49 @@
+clear all;close all;clc;
+cidrCanonicalizer();
+
+function cidrCanonicalizer
+    % Main function to test CIDR canonicalization
+
+    % Define test cases
+    testCases = {
+        '36.18.154.103/12', '36.16.0.0/12';
+        '62.62.197.11/29', '62.62.197.8/29';
+        '67.137.119.181/4', '64.0.0.0/4';
+        '161.214.74.21/24', '161.214.74.0/24';
+        '184.232.176.184/18', '184.232.128.0/18'
+    };
+
+    % Run test cases
+    for i = 1:size(testCases, 1)
+        ip = testCases{i, 1};
+        expected = testCases{i, 2};
+        result = canonicalize(ip);
+        fprintf('%s -> %s\n', ip, result);
+        assert(strcmp(result, expected));
+    end
+end
+
+function result = dottedToInt(dotted)
+    % Convert dotted IP to integer representation
+    parts = str2double(strsplit(dotted, '.'));
+    result = sum(parts .* (256 .^ (3:-1:0)));
+end
+
+function result = intToDotted(ip)
+    % Convert integer IP to dotted representation
+    result = strjoin(arrayfun(@(x) num2str(bitshift(bitand(ip, bitshift(255, x)), -x)), [24 16 8 0], 'UniformOutput', false), '.');
+end
+
+function result = networkMask(numberOfBits)
+    % Create a network mask for the given number of bits
+    result = bitshift((bitshift(1, numberOfBits) - 1), (32 - numberOfBits));
+end
+
+function result = canonicalize(ip)
+    % Canonicalize the given CIDR IP
+    [dotted, networkBits] = strtok(ip, '/');
+    networkBits = str2double(strrep(networkBits, '/', ''));
+    i = dottedToInt(dotted);
+    mask = networkMask(networkBits);
+    result = strcat(intToDotted(bitand(i, mask)), '/', num2str(networkBits));
+end