--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libcoding/hexdump.c	Thu Jun 13 02:29:29 2024 +0000
@@ -0,0 +1,38 @@
+/*
+ * This library module implements a simple hex dump facility.
+ */
+
+#include <sys/types.h>
+#include <stdio.h>
+
+msg_bits_hexdump(dumpbuf, dumplen)
+	u_char *dumpbuf;
+	unsigned dumplen;
+{
+	u_char *buf = dumpbuf;
+	unsigned lineoff, linelen, i, c;
+
+	for (lineoff = 0; lineoff < dumplen; ) {
+		linelen = dumplen - lineoff;
+		if (linelen > 16)
+			linelen = 16;
+		printf("%02X:  ", lineoff);
+		for (i = 0; i < 16; i++) {
+			if (i < linelen)
+				printf("%02X ", buf[i]);
+			else
+				fputs("   ", stdout);
+			if (i == 7 || i == 15)
+				putchar(' ');
+		}
+		for (i = 0; i < linelen; i++) {
+			c = buf[i];
+			if (c < ' ' || c > '~')
+				c = '.';
+			putchar(c);
+		}
+		putchar('\n');
+		buf += linelen;
+		lineoff += linelen;
+	}
+}