Merge hexdump(9) to userland as hexdump(3) in libutil. I'm tired of doing

this by hand in userland utilities.

MFC after:	1 month

1 files changed, 96 insertions, 0 deletions

diff --git a/lib/libutil/hexdump.c b/lib/libutil/hexdump.c
new file mode 100644
index 0000000..76b93ce
--- /dev/null
+++ b/lib/libutil/hexdump.c
@@ -0,0 +1,96 @@
+/*-
+ * Copyright (c) 1986, 1988, 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)subr_prf.c	8.3 (Berkeley) 1/21/94
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <libutil.h>
+#include <stdio.h>
+
+void
+hexdump(const void *ptr, int length, const char *hdr, int flags)
+{
+	int i, j, k;
+	int cols;
+	const unsigned char *cp;
+	char delim;
+
+	if ((flags & HD_DELIM_MASK) != 0)
+		delim = (flags & HD_DELIM_MASK) >> 8;
+	else
+		delim = ' ';
+
+	if ((flags & HD_COLUMN_MASK) != 0)
+		cols = flags & HD_COLUMN_MASK;
+	else
+		cols = 16;
+
+	cp = ptr;
+	for (i = 0; i < length; i+= cols) {
+		if (hdr != NULL)
+			printf("%s", hdr);
+
+		if ((flags & HD_OMIT_COUNT) == 0)
+			printf("%04x  ", i);
+
+		if ((flags & HD_OMIT_HEX) == 0) {
+			for (j = 0; j < cols; j++) {
+				k = i + j;
+				if (k < length)
+					printf("%c%02x", delim, cp[k]);
+				else
+					printf("   ");
+			}
+		}
+
+		if ((flags & HD_OMIT_CHARS) == 0) {
+			printf("  |");
+			for (j = 0; j < cols; j++) {
+				k = i + j;
+				if (k >= length)
+					printf(" ");
+				else if (cp[k] >= ' ' && cp[k] <= '~')
+					printf("%c", cp[k]);
+				else
+					printf(".");
+			}
+			printf("|");
+		}
+		printf("\n");
+	}
+}
+