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| author | Changli Gao <xiaosuo@gmail.com> | 2010-10-26 23:22:50 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-27 01:52:16 +0200 |
| commit | b903c0b8899b46829a9b80ba55b61079b35940ec (patch) | |
| tree | c5fd68065bf1fe9d89c08d979fccfea4b78ba4f4 /lib/vsprintf.c | |
| parent | vsprintf.c: use default pointer field size for "(null)" strings (diff) | |
| download | linux-b903c0b8899b46829a9b80ba55b61079b35940ec.tar.xz linux-b903c0b8899b46829a9b80ba55b61079b35940ec.zip | |
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>
Diffstat (limited to '')
| -rw-r--r-- | lib/vsprintf.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 8378c136b6e1..c150d3dafff4 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -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); |