Refactor, improved readability

cli.cpp

@@ -0,0 +1,44 @@
+//
+// Created by Andrew on 01/06/2023.
+//
+
+#include "header.h"
+
+void print_product_id(ul32 *pid)
+{
+    char raw[12];
+    char b[6], c[8];
+    int i, digit = 0;
+
+    //	Cut a away last bit of pid and convert it to an accii-number (=raw)
+    sprintf(raw, "%lu", pid[0] >> 1);
+
+    // Make b-part {640-....}
+    strncpy(b, raw, 3);
+    b[3] = 0;
+
+    // Make c-part {...-123456X...}
+    strcpy(c, raw + 3);
+    printf("> %s\n", c);
+
+    // Make checksum digit-part {...56X-}
+    assert(strlen(c) == 6);
+    for (i = 0; i < 6; i++)
+        digit -= c[i] - '0';	// Sum digits
+
+    while (digit < 0)
+        digit += 7;
+    c[6] = digit + '0';
+    c[7] = 0;
+
+    printf("Product ID: PPPPP-%s-%s-23xxx\n", b, c);
+}
+
+void print_product_key(char *pk) {
+    int i;
+    assert(strlen(pk) == 25);
+    for (i = 0; i < 25; i++) {
+        putchar(pk[i]);
+        if (i != 24 && i % 5 == 4) putchar('-');
+    }
+}