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scanf: fix handling of %n token

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svn path=/trunk/; revision=14157
This commit is contained in:
Gunnar Dalsnes 2005-03-17 00:31:40 +00:00
parent 9019d252be
commit cd4a8585a8
1 changed files with 30 additions and 7 deletions
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37
reactos/lib/ntdll/stdio/scanf.h
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@ -422,13 +422,36 @@ _FUNCTION_ {
}
}
break;
case 'n': {
if (!suppress) {
int*n = va_arg(ap, int*);
*n = consumed - (nch!=_EOF_);
}
}
break;
case 'n': {
if (!suppress) {
int*n = va_arg(ap, int*);
/*
*n = consumed - (nch!=_EOF_);
FIXME: The above is the Wine version and it doesnt work in ros
when %n is at end of input string (return one too many).
But does it fail in Wine too?? If so wine also needs fixin.
-Gunnar
*/
*n = consumed - 1;
}
/* This is an odd one: according to the standard,
* "Execution of a %n directive does not increment the
* assignment count returned at the completion of
* execution" even if it wasn't suppressed with the
* '*' flag. The Corrigendum to the standard seems
* to contradict this (comment out the assignment to
* suppress below if you want to implement these
* alternate semantics) but the windows program I'm
* looking at expects the behavior I've coded here
* (which happens to be what glibc does as well).
*/
suppress = 1;
st = 1;
}
break;
case '[': {
_CHAR_ *str = suppress ? NULL : va_arg(ap, _CHAR_*);
_CHAR_ *sptr = str;