bk commit into 5.0 tree (cmiller:1.2113)

[Chad MILLER]

Below is the list of changes that have just been committed into a local
5.0 repository of cmiller. When cmiller does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
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ChangeSet
  1.2113 06/05/02 13:42:35 cmiller@zippy.(none) +1 -0
  An update to as-yet unused new feature of snprintf, which was added to bring 
  our sprintf()-alike in sync with our fprintf()-alike features.

  strings/my_vsnprintf.c
    1.35 06/05/02 13:42:30 cmiller@zippy.(none) +5 -1
    Advance the destination pointer properly.
    
    Also, pay attention to the "n" in snprintf() -- never write too much.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	cmiller
# Host:	zippy.(none)
# Root:	/home/cmiller/work/mysql/mysql-5.0__bug17667

--- 1.34/strings/my_vsnprintf.c	2006-05-01 22:10:44 -04:00
+++ 1.35/strings/my_vsnprintf.c	2006-05-02 13:42:30 -04:00
@@ -99,7 +99,11 @@
     else if (*fmt == 'b')				/* Buffer parameter */
     {
       char *par = va_arg(ap, char *);
-      to=memmove(to, par, abs(width));
+      DBUG_ASSERT(to <= end);
+      if (to + abs(width) + 1 > end)
+        width= end - to - 1;  /* sign doesn't matter */
+      memmove(to, par, abs(width));
+      to+= width;
       continue;
     }
     else if (*fmt == 'd' || *fmt == 'u'|| *fmt== 'x')	/* Integer parameter */