feat: console.c added

console.c

@@ -1,7 +1,6 @@
 // Console input and output.
 // Input is from the keyboard or serial port.
 // Output is written to the screen and serial port.
-
 #include "types.h"
 #include "defs.h"
 #include "param.h"
@@ -187,6 +186,9 @@ struct {
 } input;
 
 #define C(x)  ((x)-'@')  // Control-x
+#define K 4
+char saved_buf[INPUT_BUF]; // saved buffer of copy-paste
+int saved_buffer_size = 0;
 
 void
 consoleintr(int (*getc)(void))
@@ -200,6 +202,51 @@ consoleintr(int (*getc)(void))
       // procdump() locks cons.lock indirectly; invoke later
       doprocdump = 1;
       break;
+    case 67: case 88: //copy and cut
+      for (int i = (input.e - input.r) - K; i < input.e - input.r ; i++)
+      {
+        saved_buf[i - (input.e - input.r - K)] = input.buf[(input.r + i ) % INPUT_BUF];
+        saved_buffer_size += 1;
+      }
+
+      if (c == 88)
+      {
+        while(input.e != input.w && input.buf[(input.e-1) % INPUT_BUF] != '\n'){
+        input.e--;
+        consputc(BACKSPACE);
+      }
+      }
+      break;
+    case 86: //paste
+      for (int i = 0; i < saved_buffer_size; i++)
+      {
+        c = saved_buf[i];
+        consputc(c);
+      }
+      break;
+
+    case C('E'):
+      for (int i = 0; i < input.e - input.r ; i++)
+      {
+        int temp = input.buf[(input.r + i ) % INPUT_BUF];
+        if(temp >= 48 && temp <= 53)
+        {
+          temp += 4;
+        }
+        else if(temp >= 54 && temp <= 57)
+        {
+
+        }
+        else if(temp >= 97 && temp <= 122)
+        {
+
+        }
+        else if(temp >= 65 && temp <= 90)
+        {
+
+        }
+        // saved_buf[i] =
+      }
     case C('U'):  // Kill line.
       while(input.e != input.w &&
             input.buf[(input.e-1) % INPUT_BUF] != '\n'){
@@ -293,7 +340,5 @@ consoleinit(void)
   devsw[CONSOLE].write = consolewrite;
   devsw[CONSOLE].read = consoleread;
   cons.locking = 1;
-
   ioapicenable(IRQ_KBD, 0);
 }
-