[alsa-devel] [PATCH v4 12/12] tree-wide: convert open calls to remove spaces to skip_spaces() lib function

[Julia Lawall]

> > Also, while at it, if we see (*str && isspace(*str)), we can be sure to
> > remove the first condition (*str) as the second one (isspace(*str)) also
> > evaluates to 0 whenever *str == 0, making it redundant. In other words,
> > "a char equals zero is never a space".

I tried the following semantic patch (http://coccinelle.lip6.fr), and got 
the results below.

@@
expression str;
@@

( // ignore skip_spaces cases
 while (*str &&  isspace(*str)) { \(str++;\|++str;\) }
|
- *str && 
  isspace(*str)
)

I haven't checked the results in any way, however.

julia

diff -u -p a/drivers/leds/led-class.c b/drivers/leds/led-class.c
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -50,7 +50,7 @@ static ssize_t led_brightness_store(stru
 	unsigned long state = simple_strtoul(buf, &after, 10);
 	size_t count = after - buf;
 
-	if (*after && isspace(*after))
+	if (isspace(*after))
 		count++;
 
 	if (count == size) {
diff -u -p a/drivers/leds/ledtrig-timer.c b/drivers/leds/ledtrig-timer.c
--- a/drivers/leds/ledtrig-timer.c
+++ b/drivers/leds/ledtrig-timer.c
@@ -83,7 +83,7 @@ static ssize_t led_delay_on_store(struct
 	unsigned long state = simple_strtoul(buf, &after, 10);
 	size_t count = after - buf;
 
-	if (*after && isspace(*after))
+	if (isspace(*after))
 		count++;
 
 	if (count == size) {
@@ -127,7 +127,7 @@ static ssize_t led_delay_off_store(struc
 	unsigned long state = simple_strtoul(buf, &after, 10);
 	size_t count = after - buf;
 
-	if (*after && isspace(*after))
+	if (isspace(*after))
 		count++;
 
 	if (count == size) {
diff -u -p a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -101,7 +101,7 @@ static ssize_t lcd_store_power(struct de
 	int power = simple_strtoul(buf, &endp, 0);
 	size_t size = endp - buf;
 
-	if (*endp && isspace(*endp))
+	if (isspace(*endp))
 		size++;
 	if (size != count)
 		return -EINVAL;
@@ -140,7 +140,7 @@ static ssize_t lcd_store_contrast(struct
 	int contrast = simple_strtoul(buf, &endp, 0);
 	size_t size = endp - buf;
 
-	if (*endp && isspace(*endp))
+	if (isspace(*endp))
 		size++;
 	if (size != count)
 		return -EINVAL;
diff -u -p a/drivers/video/display/display-sysfs.c b/drivers/video/display/display-sysfs.c
--- a/drivers/video/display/display-sysfs.c
+++ b/drivers/video/display/display-sysfs.c
@@ -67,7 +67,7 @@ static ssize_t display_store_contrast(st
 	contrast = simple_strtoul(buf, &endp, 0);
 	size = endp - buf;
 
-	if (*endp && isspace(*endp))
+	if (isspace(*endp))
 		size++;
 
 	if (size != count)
diff -u -p a/drivers/video/output.c b/drivers/video/output.c
--- a/drivers/video/output.c
+++ b/drivers/video/output.c
@@ -50,7 +50,7 @@ static ssize_t video_output_store_state(
 	int request_state = simple_strtoul(buf,&endp,0);
 	size_t size = endp - buf;
 
-	if (*endp && isspace(*endp))
+	if (isspace(*endp))
 		size++;
 	if (size != count)
 		return -EINVAL;