Add: morse, rot13, and more docs

src/kernel/shell.c

@@ -66,6 +66,8 @@ void shell_install()
   register_command("echo", program_echo);
   register_command("sysinfo", program_sysinfo);
   register_command("conway", program_conway);
+  register_command("rot13", program_rot13);
+  register_command("morse", program_morse);
 
   for (;;)
   {

src/programs/ciphers.c

@@ -0,0 +1,128 @@
+#include "../libc/stdio.h"
+#include "ciphers.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()
+{
+	char input_buffer[BUFFER_SIZE];
+	char output[BUFFER_SIZE];
+	puts("String? ");
+	get_input(input_buffer, BUFFER_SIZE);
+	rot13(input_buffer, output);
+	printf("\n%s\n", output);
+}
+
+#include "../libc/string.h"
+#include "../libc/stdint.h"
+
+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() {
+    char output[512]; 
+    char input_buffer[BUFFER_SIZE];
+    puts("String? ");
+    get_input(input_buffer, BUFFER_SIZE);
+    to_morse(input_buffer, output);
+    printf("\n%s\n", output);
+}
+

src/programs/ciphers.h

@@ -0,0 +1,6 @@
+#ifndef CIPHERS_H
+#define CIPHERS_H
+
+#define BUFFER_SIZE 256
+
+#endif

src/programs/misc.c

@@ -45,7 +45,7 @@ void program_uptime()
 
 void program_help()
 {
-	printf("help\tpanic\twords\tprimes\trainbow\tclear\nmath\tbf\t   uptime   echo\t  sysinfo\tconway\n");
+	printf("help\tpanic\twords\tprimes\trainbow\tclear\nmath\tbf\t   uptime   echo\t  sysinfo\tconway\nrot13   morse\n");
 }
 
 // Panic

src/programs/programs.h

@@ -11,6 +11,10 @@ void get_cpuid();
 void get_meminfo(unsigned int multiboot_info_address);
 void program_conway();
 
+// Ciphers
+void program_rot13();
+void program_morse();
+
 // Misc
 void program_rainbow();
 void program_clear();