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From: Vishal Verma <vishal.l.verma@intel.com>
To: <nvdimm@lists.linux.dev>, <linux-cxl@vger.kernel.org>
Cc: Dan Williams <dan.j.williams@intel.com>,
	Ben Widawsky <ben.widawsky@intel.com>,
	Alison Schofield <alison.schofield@intel.com>,
	Ira Weiny <ira.weiny@intel.com>,
	Vishal Verma <vishal.l.verma@intel.com>
Subject: [ndctl PATCH v3 11/21] util/hexdump: Add a util helper to print a buffer in hex
Date: Thu,  1 Jul 2021 14:09:55 -0600	[thread overview]
Message-ID: <20210701201005.3065299-12-vishal.l.verma@intel.com> (raw)
In-Reply-To: <20210701201005.3065299-1-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/

Cc: Ben Widawsky <ben.widawsky@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
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);
+}
-- 
2.31.1


  parent reply	other threads:[~2021-07-01 20:10 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-01 20:09 [ndctl PATCH v3 00/21] Initial CXL support Vishal Verma
2021-07-01 20:09 ` [ndctl PATCH v3 01/21] ndctl: add .clang-format Vishal Verma
2021-07-10  1:12   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 02/21] cxl: add a cxl utility and libcxl library Vishal Verma
2021-07-10  1:12   ` Dan Williams
2021-07-13 21:14     ` Verma, Vishal L
2021-07-01 20:09 ` [ndctl PATCH v3 03/21] cxl: add a local copy of the cxl_mem UAPI header Vishal Verma
2021-07-10  1:13   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 04/21] libcxl: add support for command query and submission Vishal Verma
2021-07-13  5:12   ` Dan Williams
2021-07-13 21:17     ` Verma, Vishal L
2021-07-13 21:39       ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 05/21] libcxl: add support for the 'Identify Device' command Vishal Verma
2021-07-15 23:50   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 06/21] test: rename 'ndctl_test' to 'test_ctx' Vishal Verma
2021-07-15 23:51   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 07/21] test: rename 'ndctl_test_*' helpers to 'test_*' Vishal Verma
2021-07-15 23:51   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 08/21] test: introduce a libcxl unit test Vishal Verma
2021-07-15 23:53   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 09/21] libcxl: add GET_HEALTH_INFO mailbox command and accessors Vishal Verma
2021-07-16  1:11   ` Dan Williams
2021-07-01 20:09 ` [ndctl PATCH v3 10/21] libcxl: add support for the 'GET_LSA' command Vishal Verma
2021-07-16  2:24   ` Dan Williams
2021-07-01 20:09 ` Vishal Verma [this message]
2021-07-01 20:09 ` [ndctl PATCH v3 12/21] test/libcxl: add a test for {set, get}_lsa commands Vishal Verma
2021-07-01 20:09 ` [ndctl PATCH v3 13/21] test/libcxl: introduce a command size fuzzing test Vishal Verma
2021-07-01 20:09 ` [ndctl PATCH v3 14/21] libcxl: add lsa_size to cxl_memdev, and an API to retrieve it Vishal Verma
2021-07-01 20:09 ` [ndctl PATCH v3 15/21] libcxl: PLACEHOLDER: add an interface to determine whether a memdev is active Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 16/21] libcxl: add interfaces for label operations Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 17/21] test/libcxl: add a test for cxl_memdev_{get,set}_lsa Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 18/21] cxl: add commands to read, write, and zero labels Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 19/21] Documentation/cxl: add library API documentation Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 20/21] ndctl: Add CXL packages to the RPM spec Vishal Verma
2021-07-01 20:10 ` [ndctl PATCH v3 21/21] cxl-cli: add bash completion Vishal Verma
2021-07-01 20:13 ` [ndctl PATCH v3 00/21] Initial CXL support Verma, Vishal L

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