1 files changed, 44 insertions, 0 deletions
diff --git a/client/xxd.c b/client/xxd.c
new file mode 100644
index 0000000..5d83635
--- /dev/null
+++ b/client/xxd.c
@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <ctype.h>
+
+#include "xxd.h"
+
+void xxd(const char * data, size_t size) {
+	size_t fake_size = size + (16 - size % 16) % 16;
+
+	for (size_t base = 0; base < fake_size; base += 16) {
+		printf("%08lx:  ", base);
+
+		// print bytes
+		for (size_t offset = 0; offset < 16; offset++) {
+			size_t i = base + offset;
+
+			if (offset == 8) printf(" ");
+
+			if (i >= size) {
+				printf("   ");
+				continue;
+			}
+
+			printf("%02x ", data[i] & 0xff);
+		}
+
+		// print ascii representation
+		printf(" |");
+		for (size_t offset = 0; offset < 16; offset++) {
+			size_t i = base + offset;
+
+			if (i >= size) {
+				printf(" ");
+				continue;
+			}
+
+			if (isprint(data[i]))
+				printf("%c", data[i]);
+			else
+				printf(".");
+		}
+		printf("|\n");
+	}
+}
+