FreeList hexdump now takes width argument

freelist/hexdump.c

@@ -2,30 +2,31 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
 
-void hexdump(const void *data, size_t size) {
+void hexdump(const void *data, const size_t size, const size_t width) {
     const unsigned char *p = (const unsigned char *)data;
     size_t               i, j;
 
-    for (i = 0; i < size; i += 16) {
-        // Print offset
+    for (i = 0; i < size; i += width) {
         printf("%08zx  ", i);
 
-        // Print hex bytes
-        for (j = 0; j < 16; j++) {
+        for (j = 0; j < width; j++) {
             if (i + j < size) {
                 printf("%02X ", p[i + j]);
             } else {
-                printf("   "); // padding for incomplete lines
+                printf("   ");
             }
-            if (j == 7)
-                printf(" "); // extra space in middle
+
+            if ((j + 1) % 8 == 0)
+                printf(" ");
         }
 
         printf(" |");
 
-        // Print ASCII characters
-        for (j = 0; j < 16 && i + j < size; j++) {
+        for (j = 0; j < width && i + j < size; j++) {
             unsigned char c = p[i + j];
             printf("%c", isprint(c) ? c : '.');
         }