You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
-/* Get specification. */
#include "snprintf.h"
-/* Get memcpy. */
+#include <stdarg.h>
+#include <stdlib.h>
#include <string.h>
-/* Get vasnprintf. */
-#include "vasnprintf.h"
-
-/* Get MIN. */
#include "minmax.h"
+#include "vasnprintf.h"
/* Print formatted output to string STR. Similar to sprintf, but
additional length SIZE limit how much is written into STR. Returns
int
snprintf (char *str, size_t size, const char *format, ...)
{
+ char *output;
size_t len;
- char *out = vasnprintf (NULL, &len, format, args);
+ va_list args;
+
+ va_start (args, format);
+ len = size;
+ output = vasnprintf (str, &len, format, args);
+ va_end (args);
- if (!out)
+ if (!output)
return -1;
- if (str)
- {
- memcpy (str, out, MIN (len + 1, size));
+ if (str != NULL)
+ if (len > size - 1) /* equivalent to: (size > 0 && len >= size) */
str[size - 1] = '\0';
- }
- free (out);
+ if (output != str)
+ free (output);
return len;
}