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authorAndré Goddard Rosa <andre.goddard@gmail.com>2009-12-14 18:01:06 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-15 08:53:32 -0800
commite7d2860b690d4f3bed6824757c540579638e3d1e (patch)
tree84268ee28893256fd6a6a7e1d4474f61dbee74e7 /lib/vsprintf.c
parent84c95c9acf088c99d8793d78036b67faa5d0b851 (diff)
tree-wide: convert open calls to remove spaces to skip_spaces() lib function
Makes use of skip_spaces() defined in lib/string.c for removing leading spaces from strings all over the tree. It decreases lib.a code size by 47 bytes and reuses the function tree-wide: text data bss dec hex filename 64688 584 592 65864 10148 (TOTALS-BEFORE) 64641 584 592 65817 10119 (TOTALS-AFTER) 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". Julia Lawall tried the semantic patch (http://coccinelle.lip6.fr) below, and found occurrences of this pattern on 3 more files: drivers/leds/led-class.c drivers/leds/ledtrig-timer.c drivers/video/output.c @@ expression str; @@ ( // ignore skip_spaces cases while (*str && isspace(*str)) { \(str++;\|++str;\) } | - *str && isspace(*str) ) Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Cc: Julia Lawall <julia@diku.dk> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Neil Brown <neilb@suse.de> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Cc: David Howells <dhowells@redhat.com> Cc: <linux-ext4@vger.kernel.org> Cc: Samuel Ortiz <samuel@sortiz.org> Cc: Patrick McHardy <kaber@trash.net> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/vsprintf.c')
-rw-r--r--lib/vsprintf.c15
1 files changed, 4 insertions, 11 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index c50733a690f..7857d4dd62d 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1766,13 +1766,6 @@ EXPORT_SYMBOL_GPL(bprintf);
#endif /* CONFIG_BINARY_PRINTF */
-static noinline char *skip_space(const char *str)
-{
- while (isspace(*str))
- ++str;
- return (char *)str;
-}
-
/**
* vsscanf - Unformat a buffer into a list of arguments
* @buf: input buffer
@@ -1794,8 +1787,8 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
* white space, including none, in the input.
*/
if (isspace(*fmt)) {
- fmt = skip_space(fmt);
- str = skip_space(str);
+ fmt = skip_spaces(++fmt);
+ str = skip_spaces(str);
}
/* anything that is not a conversion must match exactly */
@@ -1865,7 +1858,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
if (field_width == -1)
field_width = INT_MAX;
/* first, skip leading white space in buffer */
- str = skip_space(str);
+ str = skip_spaces(str);
/* now copy until next white space */
while (*str && !isspace(*str) && field_width--)
@@ -1907,7 +1900,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
/* have some sort of integer conversion.
* first, skip white space in buffer.
*/
- str = skip_space(str);
+ str = skip_spaces(str);
digit = *str;
if (is_sign && digit == '-')