### Eclipse Workspace Patch 1.0
#P avr-libc
Index: libc/stdio/vfscanf.c
===================================================================
RCS file: /sources/avr-libc/avr-libc/libc/stdio/vfscanf.c,v
retrieving revision 1.13
diff -u -r1.13 vfscanf.c
--- libc/stdio/vfscanf.c	9 Nov 2005 21:54:33 -0000	1.13
+++ libc/stdio/vfscanf.c	25 Oct 2007 23:34:44 -0000
@@ -264,18 +264,15 @@
 				if (!(flags & FLSTAR))
 #endif /* SCANF_LEVEL > SCANF_MIN */
 					a.cp = va_arg(ap, char *);
-				do {
-					i = getc(stream);
-				} while (isspace(i));
-				if (i == EOF)
-					goto leave;
 
 #if SCANF_LEVEL > SCANF_MIN
-				while (width-- > 0)
+				do
 #else
 				for (;;)
 #endif /* SCANF_LEVEL > SCANF_MIN */
 				{
+					if ((i = getc(stream)) == EOF)
+						break;
 					if (isspace(i)) {
 						ungetc(i, stream);
 						break;
@@ -284,10 +281,10 @@
 					if (!(flags & FLSTAR))
 #endif /* SCANF_LEVEL > SCANF_MIN */
 						*a.cp++ = i;
-					if ((i = getc(stream)) == EOF)
-						break;
+					
 				}
 #if SCANF_LEVEL > SCANF_MIN
+				while (--width > 0);
 				if (!(flags & FLSTAR))
 #endif /* SCANF_LEVEL > SCANF_MIN */
 					*a.cp = '\0';


I included a patch file.

Here are comment on the patch:

do {
   i = getc(stream);
} while (isspace(i));
if (i == EOF)
   goto leave;

this was remove.  Reason: 
Man file state: Matches a sequence of non-white-space characters...
Obviosly that part of code as the exact purpose of removing any leading space(or white-space characters).  As a second remark, we dont yet decrement width(hit, bug is sscanf eats 1 char too much)
.

Next modif:
- while (width-- > 0)
+ do

Using a post decrement tation will end up in the following senarion.  if Width == 6, we will loop 6 time, this way we will read 6 char from the stream.  Didn't we just read 1 earlyer?

next modification: Bring 
if ((i = getc(stream)) == EOF)
  break;
just after the do

Since we are going to do some test condition on var i, we better have something in it.  I guess it was done later on due to the fact that it was red in the part I removed earlyer.

final modif:
while (--width > 0);

To close the do-while, this will ensure a width reading.


I have not done much testing on it, just things that came to my mind.  Comment are welcome

Fred