init

User/util/hexdump.c

@@ -0,0 +1,39 @@
+#include "stdio.h"
+#include <ctype.h>
+#include "hexdump.h"
+
+void hexdump (const char *label, const uint8_t *data, size_t len) {
+    if (label)
+        iprintf ("%s (len=%u):\n", label, len);
+
+    for (size_t i = 0; i < len; i += 16) {
+        iprintf ("%04u  ", i);  // offset
+        for (size_t j = 0; j < 16; j++) {
+            if (i + j < len)
+                iprintf ("%02X ", data[i + j]);
+            else
+                iprintf ("   ");  // pad spacing
+        }
+        iprintf (" ");
+        for (size_t j = 0; j < 16 && i + j < len; j++) {
+            uint8_t c = data[i + j];
+            iprintf ("%c", isprint (c) ? c : '.');
+        }
+        iprintf ("\n");
+    }
+}
+
+void hexdump_compact(const uint8_t* data, size_t len, char* out, size_t out_size) {
+    size_t pos = 0;
+
+    for (size_t i = 0; i < len; i++) {
+        if (pos + 2 >= out_size) break;  // make sure we don¡¯t overflow
+        snprintf(out + pos, 3, "%02x", data[i]); // 2 chars + null terminator
+        pos += 2;
+    }
+
+    if (pos < out_size)
+        out[pos] = '\0';
+    else
+        out[out_size - 1] = '\0'; // ensure null termination
+}