BUG: Walking logic in check() is broken. Moving aligning into source, removing macros

freelist/hexdump.c

@@ -0,0 +1,35 @@
+#include <ctype.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+
+void hexdump(const void *data, size_t size) {
+    const unsigned char *p = (const unsigned char *)data;
+    size_t               i, j;
+
+    for (i = 0; i < size; i += 16) {
+        // Print offset
+        printf("%08zx  ", i);
+
+        // Print hex bytes
+        for (j = 0; j < 16; j++) {
+            if (i + j < size) {
+                printf("%02x ", p[i + j]);
+            } else {
+                printf("   "); // padding for incomplete lines
+            }
+            if (j == 7)
+                printf(" "); // extra space in middle
+        }
+
+        printf(" |");
+
+        // Print ASCII characters
+        for (j = 0; j < 16 && i + j < size; j++) {
+            unsigned char c = p[i + j];
+            printf("%c", isprint(c) ? c : '.');
+        }
+
+        printf("|\n");
+    }
+}