still wip

User/util/hexdump.c

@@ -0,0 +1,24 @@
+#include "stdio.h"
+#include <ctype.h>
+#include "hexdump.h"
+
+void hexdump (const char *label, const uint8_t *data, size_t len) {
+    if (label)
+        printf ("%s (len=%u):\n", label, len);
+
+    for (size_t i = 0; i < len; i += 16) {
+        printf ("%04u  ", i);  // offset
+        for (size_t j = 0; j < 16; j++) {
+            if (i + j < len)
+                printf ("%02X ", data[i + j]);
+            else
+                printf ("   ");  // pad spacing
+        }
+        printf (" ");
+        for (size_t j = 0; j < 16 && i + j < len; j++) {
+            uint8_t c = data[i + j];
+            printf ("%c", isprint (c) ? c : '.');
+        }
+        printf ("\n");
+    }
+}

User/util/hexdump.h

@@ -0,0 +1,9 @@
+#ifndef HEXDUMP_HEADER
+#define HEXDUMP_HEADER
+
+
+#include "stddef.h"
+#include "stdint.h"
+void hexdump (const char *label, const uint8_t *data, size_t len);
+
+#endif