linux-kernel - [PATCH v2 2/9] test_hexdump: introduce test_hexdump_prepare

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Date:	Wed,  9 Dec 2015 02:49:58 +0200
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v2 2/9] test_hexdump: introduce test_hexdump_prepare_test() helper

The function prepares the expected result in the provided buffer.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Acked-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
 lib/test_hexdump.c | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/lib/test_hexdump.c b/lib/test_hexdump.c
index 5241df3..ed7c6a7 100644
--- a/lib/test_hexdump.c
+++ b/lib/test_hexdump.c
@@ -42,19 +42,16 @@ static const char * const test_data_8_le[] __initconst = {
 	"e9ac0f9cad319ca6", "0cafb1439919d14c",
 };
 
-static void __init test_hexdump(size_t len, int rowsize, int groupsize,
-				bool ascii)
+static void __init test_hexdump_prepare_test(size_t len, int rowsize,
+					     int groupsize, char *test,
+					     size_t testlen, bool ascii)
 {
-	char test[32 * 3 + 2 + 32 + 1];
-	char real[32 * 3 + 2 + 32 + 1];
 	char *p;
 	const char * const *result;
 	size_t l = len;
 	int gs = groupsize, rs = rowsize;
 	unsigned int i;
 
-	hex_dump_to_buffer(data_b, l, rs, gs, real, sizeof(real), ascii);
-
 	if (rs != 16 && rs != 32)
 		rs = 16;
 
@@ -73,7 +70,7 @@ static void __init test_hexdump(size_t len, int rowsize, int groupsize,
 	else
 		result = test_data_1_le;
 
-	memset(test, ' ', sizeof(test));
+	memset(test, ' ', testlen);
 
 	/* hex dump */
 	p = test;
@@ -95,6 +92,21 @@ static void __init test_hexdump(size_t len, int rowsize, int groupsize,
 	}
 
 	*p = '\0';
+}
+
+#define TEST_HEXDUMP_BUF_SIZE		(32 * 3 + 2 + 32 + 1)
+
+static void __init test_hexdump(size_t len, int rowsize, int groupsize,
+				bool ascii)
+{
+	char test[TEST_HEXDUMP_BUF_SIZE];
+	char real[TEST_HEXDUMP_BUF_SIZE];
+
+	hex_dump_to_buffer(data_b, len, rowsize, groupsize, real, sizeof(real),
+			   ascii);
+
+	test_hexdump_prepare_test(len, rowsize, groupsize, test, sizeof(test),
+				  ascii);
 
 	if (strcmp(test, real)) {
 		pr_err("Len: %zu row: %d group: %d\n", len, rowsize, groupsize);
-- 
2.6.2

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