- return EOF when stream is empty

dlls/msvcrt/scanf.h

@@ -90,6 +90,8 @@ int _FUNCTION_ {
 #endif /* CONSOLE */
 #endif /* WIDE_SCANF */
     nch = _GETC_(file);
+    if (nch == _EOF_) return _EOF_;
+    
     va_start(ap, format);
     while (*format) {
 	/* a whitespace character in the format string causes scanf to read,

dlls/msvcrt/tests/scanf.c

@@ -26,8 +26,14 @@ static void test_sscanf( void )
 {
     char buffer[100];
     char format[20];
-    int result;
-
+    int result, ret;
+
+    /* check EOF */
+    strcpy(buffer,"");
+    ret = sscanf(buffer, "%d", &result);
+    ok( ret == EOF,"sscanf returns %x instead of %x", ret, EOF );
+		
+    /* check %x */
     strcpy(buffer,"0x519");
     ok( sscanf(buffer, "%x", &result) == 1, "sscanf failed"  );
     ok( result == 0x519,"sscanf reads %x instead of %x", result, 0x519 );