Re: [PATCH v3 2/7] lib/hexdump.c: Relax rowsize checks in hex_dump_to_buffer

On Mon, 2019-06-17 at 15:47 -0700, Randy Dunlap wrote:

Hi,
Just a comment style nit below...

On 6/16/19 7:04 PM, Alastair D'Silva wrote:

quoted

From: Alastair D'Silva <redacted>

This patch removes the hardcoded row limits and allows for
other lengths. These lengths must still be a multiple of
groupsize.

This allows structs that are not 16/32 bytes to display on
a single line.

This patch also expands the self-tests to test row sizes
up to 64 bytes (though they can now be arbitrarily long).

Signed-off-by: Alastair D'Silva <redacted>
---
 lib/hexdump.c      | 48 ++++++++++++++++++++++++++++--------------
 lib/test_hexdump.c | 52 ++++++++++++++++++++++++++++++++++++++--
------
 2 files changed, 75 insertions(+), 25 deletions(-)

diff --git a/lib/hexdump.c b/lib/hexdump.c
index 81b70ed37209..3943507bc0e9 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c

@@ -246,17 +248,29 @@ void print_hex_dump(const char *level, const

char *prefix_str, int prefix_type,
 {
 	const u8 *ptr = buf;
 	int i, linelen, remaining = len;
-	unsigned char linebuf[32 * 3 + 2 + 32 + 1];
+	unsigned char *linebuf;
+	unsigned int linebuf_len;
 
-	if (rowsize != 16 && rowsize != 32)
-		rowsize = 16;
+	if (rowsize % groupsize)
+		rowsize -= rowsize % groupsize;
+
+	/* Worst case line length:
+	 * 2 hex chars + space per byte in, 2 spaces, 1 char per byte
in, NULL
+	 */

According to Documentation/process/coding-style.rst:

The preferred style for long (multi-line) comments is:

.. code-block:: c

	/*
	 * This is the preferred style for multi-line
	 * comments in the Linux kernel source code.
	 * Please use it consistently.
	 *
	 * Description:  A column of asterisks on the left side,
	 * with beginning and ending almost-blank lines.
	 */

Thanks Randy, I'll address this.


-- 
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