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lib: fix scnprintf() if @size is == 0 

scnprintf() should return 0 if @size is == 0. Update the comment for it,
as @size is unsigned.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Changli Gao 2010-10-26 14:22:50 -07:00 committed by Linus Torvalds
parent 5e05798128
commit b903c0b889
1 changed files with 6 additions and 2 deletions
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8
lib/vsprintf.c
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@ -1504,7 +1504,7 @@ EXPORT_SYMBOL(snprintf);
* @...: Arguments for the format string
*
* The return value is the number of characters written into @buf not including
* the trailing '\0'. If @size is <= 0 the function returns 0.
* the trailing '\0'. If @size is == 0 the function returns 0.
*/
int scnprintf(char *buf, size_t size, const char *fmt, ...)
@ -1516,7 +1516,11 @@ int scnprintf(char *buf, size_t size, const char *fmt, ...)
i = vsnprintf(buf, size, fmt, args);
va_end(args);
return (i >= size) ? (size - 1) : i;
if (likely(i < size))
return i;
if (size != 0)
return size - 1;
return 0;
}
EXPORT_SYMBOL(scnprintf);