From: Vishal Verma <vishal.l.verma@intel.com>
To: <linux-cxl@vger.kernel.org>
Cc: linux-nvdimm@lists.01.org, Ben Widawsky <ben.widawsky@intel.com>
Subject: [ndctl PATCH v2 10/13] util/hexdump: Add a util helper to print a buffer in hex
Date: Thu, 18 Feb 2021 19:03:28 -0700 [thread overview]
Message-ID: <20210219020331.725687-11-vishal.l.verma@intel.com> (raw)
In-Reply-To: <20210219020331.725687-1-vishal.l.verma@intel.com>
In preparation for tests that may need to set, retrieve, and display
opaque data, add a hexdump function in util.
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
util/hexdump.h | 8 ++++++++
util/hexdump.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 61 insertions(+)
create mode 100644 util/hexdump.h
create mode 100644 util/hexdump.c
diff --git a/util/hexdump.h b/util/hexdump.h
new file mode 100644
index 0000000..d322b6a
--- /dev/null
+++ b/util/hexdump.h
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2021 Intel Corporation. All rights reserved. */
+#ifndef _UTIL_HEXDUMP_H_
+#define _UTIL_HEXDUMP_H_
+
+void hex_dump_buf(unsigned char *buf, int size);
+
+#endif /* _UTIL_HEXDUMP_H_*/
diff --git a/util/hexdump.c b/util/hexdump.c
new file mode 100644
index 0000000..1ab0118
--- /dev/null
+++ b/util/hexdump.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2015-2021 Intel Corporation. All rights reserved. */
+#include <stdio.h>
+#include <util/hexdump.h>
+
+static void print_separator(int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ fprintf(stderr, "-");
+ fprintf(stderr, "\n");
+}
+
+void hex_dump_buf(unsigned char *buf, int size)
+{
+ int i;
+ const int grp = 4; /* Number of bytes in a group */
+ const int wid = 16; /* Bytes per line. Should be a multiple of grp */
+ char ascii[wid + 1];
+
+ /* Generate header */
+ print_separator((wid * 4) + (wid / grp) + 12);
+
+ fprintf(stderr, "Offset ");
+ for (i = 0; i < wid; i++) {
+ if (i % grp == 0) fprintf(stderr, " ");
+ fprintf(stderr, "%02x ", i);
+ }
+ fprintf(stderr, " Ascii\n");
+
+ print_separator((wid * 4) + (wid / grp) + 12);
+
+ /* Generate hex dump */
+ for (i = 0; i < size; i++) {
+ if (i % wid == 0) fprintf(stderr, "%08x ", i);
+ ascii[i % wid] =
+ ((buf[i] >= ' ') && (buf[i] <= '~')) ? buf[i] : '.';
+ if (i % grp == 0) fprintf(stderr, " ");
+ fprintf(stderr, "%02x ", buf[i]);
+ if ((i == size - 1) && (size % wid != 0)) {
+ int j;
+ int done = size % wid;
+ int grps_done = (done / grp) + ((done % grp) ? 1 : 0);
+ int spaces = wid / grp - grps_done + ((wid - done) * 3);
+
+ for (j = 0; j < spaces; j++) fprintf(stderr, " ");
+ }
+ if ((i % wid == wid - 1) || (i == size - 1))
+ fprintf(stderr, " %.*s\n", (i % wid) + 1, ascii);
+ }
+ print_separator((wid * 4) + (wid / grp) + 12);
+}
--
2.29.2
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next prev parent reply other threads:[~2021-02-19 2:04 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-19 2:03 [ndctl PATCH v2 00/13] Initial CXL support Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 01/13] cxl: add a cxl utility and libcxl library Vishal Verma
2021-02-22 21:36 ` Ben Widawsky
2021-02-23 19:23 ` Verma, Vishal L
2021-02-19 2:03 ` [ndctl PATCH v2 02/13] cxl: add a local copy of the cxl_mem UAPI header Vishal Verma
2021-02-22 21:41 ` Ben Widawsky
2021-02-19 2:03 ` [ndctl PATCH v2 03/13] libcxl: add support for command query and submission Vishal Verma
2021-02-22 21:55 ` Ben Widawsky
2021-02-19 2:03 ` [ndctl PATCH v2 04/13] libcxl: add support for the 'Identify Device' command Vishal Verma
2021-02-22 22:02 ` Ben Widawsky
2021-02-19 2:03 ` [ndctl PATCH v2 05/13] test: rename 'ndctl_test' to 'test_ctx' Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 06/13] test: rename 'ndctl_test_*' helpers to 'test_*' Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 07/13] test: introduce a libcxl unit test Vishal Verma
2021-02-22 22:15 ` Ben Widawsky
2021-02-19 2:03 ` [ndctl PATCH v2 08/13] libcxl: add GET_HEALTH_INFO mailbox command and accessors Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 09/13] libcxl: add support for the 'GET_LSA' command Vishal Verma
2021-02-19 2:03 ` Vishal Verma [this message]
2021-02-19 2:03 ` [ndctl PATCH v2 11/13] test/libcxl: add a test for {set, get}_lsa commands Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 12/13] Documentation/cxl: add library API documentation Vishal Verma
2021-02-19 2:03 ` [ndctl PATCH v2 13/13] test/libcxl: introduce a command size fuzzing test Vishal Verma
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