From: Paul Eggert <eggert@cs.ucla.edu>
Date: Thu, 28 Apr 2011 20:27:52 +0000 (-0700)
Subject: Improve comment.
X-Git-Tag: emacs-pretest-24.0.90~104^2~275^2~180^2~2
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=ca2d6274770983cbbe5cf087c5e74872c6941c6a;p=emacs.git

Improve comment.
---

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';