From f45683191003e30a27afe4644e85a6c637f16809 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Fri, 19 Jul 2019 13:16:11 -0400
Subject: initial commit

---
 .gitignore |  2 ++
 Makefile   |  8 ++++++++
 leet.c     | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 64 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 leet.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f772093
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.o
+leet
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..c99e546
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,8 @@
+.POSIX:
+
+CFLAGS=-Wall -Wextra -Werror -Wpedantic
+
+leet: leet.c
+
+clean:
+	rm -f *.o leet
diff --git a/leet.c b/leet.c
new file mode 100644
index 0000000..0c5bb03
--- /dev/null
+++ b/leet.c
@@ -0,0 +1,54 @@
+#define _XOPEN_SOURCE 500
+#include <ctype.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+#define COLOR(_n) (31 + (_n % 9))
+
+#define BUFSIZE 16
+
+void hexdump(uintmax_t address, size_t n, unsigned char buf[static n])
+{
+	if (n > BUFSIZE) {
+		n = BUFSIZE;
+	}
+
+	printf("\033[1m\r%015jx ", address);
+	for (size_t i = 0; i < n; i++) {
+		printf("\033[%hhdm%02hhx\033[0m ", COLOR(buf[i]), buf[i]);
+		usleep(100 * buf[i]);
+	}
+	for (size_t i = n; i < BUFSIZE; i++) {
+		printf("-- ");
+	}
+
+	for (size_t i = 0; i < n; i++) {
+		printf("\033[%hhdm%c\033[0m", COLOR(buf[i]), isprint(buf[i]) ? buf[i] : '.');
+		usleep(100 * buf[i]);
+	}
+	for (size_t i = n; i < 16; i++) {
+		printf(".");
+	}
+}
+
+int main(void)
+{
+	setvbuf(stdout, NULL, _IONBF, 0);
+
+	unsigned char buf[BUFSIZE];
+	uintmax_t address = 0;
+	srand(time(NULL));
+
+	for (;;) {
+		for (size_t i = 0; i <= sizeof(buf); i++) {
+			buf[i] = rand();
+			hexdump(address, i, buf);
+		}
+		printf("\n");
+		address += sizeof(buf);
+	}
+}
-- 
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