diff options
Diffstat (limited to 'manual/stdio.texi')
| -rw-r--r-- | manual/stdio.texi | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/manual/stdio.texi b/manual/stdio.texi index c58ca22b2d..be769a538f 100644 --- a/manual/stdio.texi +++ b/manual/stdio.texi @@ -2341,6 +2341,8 @@ The @code{snprintf} function is similar to @code{sprintf}, except that the @var{size} argument specifies the maximum number of characters to produce. The trailing null character is counted towards this limit, so you should allocate at least @var{size} characters for the string @var{s}. +If @var{size} is zero, nothing, not even the null byte, shall be written and +@var{s} may be a null pointer. The return value is the number of characters which would be generated for the given input, excluding the trailing null. If this value is |