linux-kernel - [PATCH 4/6] staging: wlan-ng: re-use string_escape

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Date:	Wed,  2 Jul 2014 16:20:27 +0300
From:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:	"John W. Linville" <linville@...driver.com>,
	Johannes Berg <johannes@...solutions.net>,
	devel@...verdev.osuosl.org, linux-wireless@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH 4/6] staging: wlan-ng: re-use string_escape_mem()

This is a generic function to escape strings by given criteria. Let's use it
instead of custom approach.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/staging/wlan-ng/prism2sta.c | 29 ++++++-----------------------
 1 file changed, 6 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/wlan-ng/prism2sta.c b/drivers/staging/wlan-ng/prism2sta.c
index 209e4db..1e44c09 100644
--- a/drivers/staging/wlan-ng/prism2sta.c
+++ b/drivers/staging/wlan-ng/prism2sta.c
@@ -61,6 +61,7 @@
 #include <linux/workqueue.h>
 #include <linux/byteorder/generic.h>
 #include <linux/ctype.h>
+#include <linux/string_helpers.h>
 
 #include <linux/io.h>
 #include <linux/delay.h>
@@ -81,27 +82,6 @@
 #include "hfa384x.h"
 #include "prism2mgmt.h"
 
-/* Create a string of printable chars from something that might not be */
-/* It's recommended that the str be 4*len + 1 bytes long */
-#define wlan_mkprintstr(buf, buflen, str, strlen) \
-{ \
-	int i = 0; \
-	int j = 0; \
-	memset(str, 0, (strlen)); \
-	for (i = 0; i < (buflen); i++) { \
-		if (isprint((buf)[i])) { \
-			(str)[j] = (buf)[i]; \
-			j++; \
-		} else { \
-			(str)[j] = '\\'; \
-			(str)[j+1] = 'x'; \
-			(str)[j+2] = hex_asc_hi((buf)[i]); \
-			(str)[j+3] = hex_asc_lo((buf)[i]); \
-			j += 4; \
-		} \
-	} \
-}
-
 static char *dev_info = "prism2_usb";
 static wlandevice_t *create_wlan(void);
 
@@ -862,8 +842,11 @@ static int prism2sta_getcardinfo(wlandevice_t *wlandev)
 	result = hfa384x_drvr_getconfig(hw, HFA384x_RID_NICSERIALNUMBER,
 					snum, HFA384x_RID_NICSERIALNUMBER_LEN);
 	if (!result) {
-		wlan_mkprintstr(snum, HFA384x_RID_NICSERIALNUMBER_LEN,
-				pstr, sizeof(pstr));
+		result = string_escape_mem(snum,
+				HFA384x_RID_NICSERIALNUMBER_LEN,
+				pstr, sizeof(pstr), ESCAPE_HEX | ESCAPE_NP,
+				NULL);
+		pstr[result] = '\0';
 		netdev_info(wlandev->netdev, "Prism2 card SN: %s\n", pstr);
 	} else {
 		netdev_err(wlandev->netdev, "Failed to retrieve Prism2 Card SN\n");
-- 
2.0.0

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