Data Update

Task/Bifid-cipher/C++/bifid-cipher.cpp

@@ -1,6 +1,7 @@
+#include <cstdint>
 #include <iostream>
 #include <stdexcept>
-#include <string>
+#include <string_view>
 #include <unordered_map>
 #include <vector>
 
@@ -8,7 +9,7 @@ typedef std::pair<int32_t, int32_t> point;
 
 class Bifid {
 public:
-	Bifid(const int32_t& n, const std::string& text) {
+	Bifid(const int32_t n, std::string_view text) {
 		if ( text.length() != n * n ) {
 			throw new std::invalid_argument("Incorrect length of text");
 		}
@@ -20,7 +21,7 @@ public:
 
 		int32_t row = 0;
 		int32_t col = 0;
-		for ( char ch : text ) {
+		for ( const char& ch : text ) {
 			grid[row][col] = ch;
 			coordinates[ch] = point(row, col);
 			col += 1;
@@ -35,9 +36,9 @@ public:
 		 }
 	}
 
-	std::string encrypt(const std::string& text) {
+	std::string encrypt(std::string_view text) {
 		std::vector<int32_t> row_one, row_two;
-		for ( char ch : text ) {
+		for ( const char& ch : text ) {
 			point coordinate = coordinates[ch];
 			row_one.push_back(coordinate.first);
 			row_two.push_back(coordinate.second);
@@ -51,9 +52,9 @@ public:
 		 return result;
 	}
 
-	std::string decrypt(const std::string& text) {
+	std::string decrypt(std::string_view text) {
 		std::vector<int32_t> row;
-		for ( char ch : text ) {
+		for ( const char& ch : text ) {
 			point coordinate = coordinates[ch];
 			row.push_back(coordinate.first);
 			row.push_back(coordinate.second);
@@ -70,8 +71,8 @@ public:
 	}
 
 	void display() const {
-		for ( std::vector<char> row : grid ) {
-			for ( char ch : row ) {
+		for ( const std::vector<char>& row : grid ) {
+			for ( const char& ch : row ) {
 				std::cout << ch << " ";
 			}
 			std::cout << std::endl;
@@ -82,7 +83,7 @@ private:
 	std::unordered_map<char, point> coordinates;
 };
 
-void runTest(Bifid bifid, std::string message) {
+void runTest(Bifid& bifid, std::string_view message) {
 	std::cout << "Using Polybius square:" << std::endl;
 	bifid.display();
 	std::cout << "Message:   " << message << std::endl;
@@ -94,9 +95,9 @@ void runTest(Bifid bifid, std::string message) {
 }
 
 int main() {
-	const std::string message1 = "ATTACKATDAWN";
-	const std::string message2 = "FLEEATONCE";
-	const std::string message3 = "THEINVASIONWILLSTARTONTHEFIRSTOFJANUARY";
+	const std::string_view message1 = "ATTACKATDAWN";
+	const std::string_view message2 = "FLEEATONCE";
+	const std::string_view message3 = "THEINVASIONWILLSTARTONTHEFIRSTOFJANUARY";
 
 	Bifid bifid1(5, "ABCDEFGHIKLMNOPQRSTUVWXYZ");
 	Bifid bifid2(5, "BGWKZQPNDSIOAXEFCLUMTHYVR");

Task/Bifid-cipher/Jq/bifid-cipher-1.jq

@@ -0,0 +1,8 @@
+# _nwise is for gojq
+def _nwise($n):
+  def n: if length <= $n then . else .[0:$n] , (.[$n:] | n) end;
+  n;
+
+# Input: a string
+# Output: a stream of strings
+def chars: explode[] | [.] | implode;

Task/Bifid-cipher/Jq/bifid-cipher-2.jq

@@ -0,0 +1,54 @@
+# Input: the message to be encrypted
+def encrypt($polybius):
+  (ascii_upcase | gsub("J"; "I") ) as $m
+  | {rows: [], cols : [] }
+  | reduce ($m|chars) as $c (.;
+      ($polybius|index($c)) as $ix
+      | if $ix
+        then .rows += [($ix/5)|floor + 1]
+        | .cols += [($ix%5) + 1]
+        else .
+        end )
+  | reduce (.rows + .cols | _nwise(2)) as $pair ("";
+      (($pair[0] - 1) * 5 + $pair[1] - 1) as $ix
+      | . + $polybius[$ix:$ix+1] ) ;
+
+# Input: the message to be decrypted
+def decrypt($polybius):
+  reduce chars as $c ( {rows: [], cols : [] };
+       ($polybius|index($c)) as $ix
+       | .rows += [($ix/5)|floor + 1]
+       | .cols += [($ix%5) + 1] )
+  | ([.rows, .cols] | transpose | flatten) as $lines
+  | ($lines|length/2) as $count
+  | $lines[:$count] as $rows
+  | $lines[$count:] as $cols
+  | [$rows, $cols] as $d
+  | reduce range(0; $count) as $i ("";
+       (($rows[$i] - 1) * 5 + $cols[$i] - 1) as $ix
+       | . + $polybius[$ix:$ix+1] ) ;
+
+def polys:
+  def p1: "ABCDEFGHIKLMNOPQRSTUVWXYZ";
+  def p2: "BGWKZQPNDSIOAXEFCLUMTHYVR";
+  def p3: "PLAYFIREXMBCDGHKNOQSTUVWZ";
+  [p1, p2, p2, p3];
+
+def messages: [
+  "ATTACKATDAWN",
+  "FLEEATONCE",
+  "ATTACKATDAWN",
+  "The invasion will start on the first of January"
+  ];
+
+def task:
+  range(0; messages|length) as $i
+  |  messages[$i]
+  | encrypt(polys[$i]) as $encrypted
+  | ($encrypted | decrypt(polys[$i] )) as $decrypted
+  | "Message   : \(.)",
+    "Encrypted : \($encrypted)",
+    "Decrypted : \($decrypted)"
+    "" ;
+
+task