Change: programs->utils

src/utils/ciphers.c

@@ -0,0 +1,160 @@
+// Cipher programs
+// Author: xamidev
+// Licensed under the Unlicense. See the repo below.
+// https://github.com/xamidev/blankos
+
+#include "../libc/stdio.h"
+#include "ciphers.h"
+#include "../libc/string.h"
+#include <stdint.h>
+
+void rot13(char* input, char* output)
+{
+	int i = 0;
+
+	while (input[i] != '\0')
+	{
+		char c = input[i];
+
+		if (c >= 'a' && c <= 'z') {
+			output[i] = ((c - 'a' + 13) % 26) + 'a';
+		} else if (c >= 'A' && c <= 'Z') {
+			output[i] = ((c - 'A' + 13) % 26) + 'A';
+		} else {
+			output[i] = c;
+		}
+
+		i++;
+	}
+	output[i] = '\0';
+}
+
+void program_rot13(int argc, char* argv[])
+{
+	if (argc < 2)
+	{
+		printf("Usage: %s <string>\n", argv[0]);
+		return;
+	}
+
+	char input_buffer[BUFFER_SIZE] = {0};
+	char output[BUFFER_SIZE] = {0};
+
+	for (int i=1; i<argc; i++)
+	{
+		strcat(input_buffer, argv[i]);
+		if (i<argc-1)
+		{
+			strcat(input_buffer, " ");
+		}
+	}
+	rot13(input_buffer, output);
+	printf("%s\n", output);
+}
+
+const char* morse_alphabet[] = {
+    ".-",   // A
+    "-...", // B
+    "-.-.", // C
+    "-..",  // D
+    ".",    // E
+    "..-.", // F
+    "--.",  // G
+    "....", // H
+    "..",   // I
+    ".---", // J
+    "-.-",  // K
+    ".-..", // L
+    "--",   // M
+    "-.",   // N
+    "---",  // O
+    ".--.", // P
+    "--.-", // Q
+    ".-.",  // R
+    "...",  // S
+    "-",    // T
+    "..-",  // U
+    "...-", // V
+    ".--",  // W
+    "-..-", // X
+    "-.--", // Y
+    "--.."  // Z
+};
+
+const char* morse_digits[] = {
+    "-----", // 0
+    ".----", // 1
+    "..---", // 2
+    "...--", // 3
+    "....-", // 4
+    ".....", // 5
+    "-....", // 6
+    "--...", // 7
+    "---..", // 8
+    "----."  // 9
+};
+
+void to_morse(const char* input, char* output) {
+    int i = 0;
+    int pos = 0;
+    
+    while (input[i] != '\0') {
+        char c = input[i];
+        
+        if (c >= 'a' && c <= 'z') {
+            const char* morse_code = morse_alphabet[c - 'a'];
+            int j = 0;
+            while (morse_code[j] != '\0') {
+                output[pos++] = morse_code[j++];
+            }
+        } else if (c >= 'A' && c <= 'Z') {
+            const char* morse_code = morse_alphabet[c - 'A'];
+            int j = 0;
+            while (morse_code[j] != '\0') {
+                output[pos++] = morse_code[j++];
+            }
+        } else if (c >= '0' && c <= '9') {
+            const char* morse_code = morse_digits[c - '0'];
+            int j = 0;
+            while (morse_code[j] != '\0') {
+                output[pos++] = morse_code[j++];
+            }
+        } else if (c == ' ') {
+            output[pos++] = ' ';
+        }
+
+        output[pos++] = ' ';
+        i++;
+    }
+    
+    if (pos > 0) {
+        output[pos - 1] = '\0';
+    } else {
+        output[pos] = '\0'; 
+    }
+}
+
+void program_morse(int argc, char* argv[]) {
+    
+    if (argc < 2)
+    {
+	printf("Usage: %s <string>\n", argv[0]);
+	return;
+    }
+	
+    char output[512]; 
+    char message[BUFFER_SIZE];
+
+    for (int i=1; i<argc; i++)
+    {
+	strcat(message, argv[i]);
+	if (i < argc-1)
+	{
+		strcat(message, " ");
+	}
+    }
+
+    to_morse(message, output);
+    printf("%s\n", output);
+}
+