Improve comment.

1 files changed, 5 insertions, 5 deletions

diff --git a/src/doprnt.c b/src/doprnt.c
index db0b66c3aa2..22950ec6fad 100644
--- a/src/doprnt.c
+++ b/src/doprnt.c
@@ -199,11 +199,11 @@ doprnt (char *buffer, register size_t bufsize, const char *format,
                   while (fmt < format_end
                          && '0' <= fmt[1] && fmt[1] <= '9')
                     {
-                      /* Avoid int overflow, because many sprintfs seriously
-                         mess up with widths or precisions greater than
-                         INT_MAX.  Avoid size_t overflow, since our counters
-                         use size_t.  This test is slightly conservative, for
-                         speed and simplicity.  */
+                      /* Avoid size_t overflow.  Avoid int overflow too, as
+                         many sprintfs mishandle widths greater than INT_MAX.
+                         This test is simple but slightly conservative: e.g.,
+                         (INT_MAX - INT_MAX % 10) is reported as an overflow
+                         even when it's not.  */
                       if (n >= min (INT_MAX, SIZE_MAX) / 10)
                         error ("Format width or precision too large");
                       n = n * 10 + fmt[1] - '0';