[tkreuzer] 52040: [CRT] in _flsbuf, always reset _cnt to 0 and don't allocate/use a buffer when _IONBUF is set. Fixes a regression in msvcrt_winetest file. See issue #5829 for more details.

Author: tkreuzer
Date: Wed Jun  1 12:08:02 2011
New Revision: 52040

URL: http://svn.reactos.org/svn/reactos?rev=52040&view=rev
Log:
[CRT]
in _flsbuf, always reset _cnt to 0 and don't allocate/use a buffer when _IONBUF is
set. Fixes a regression in msvcrt_winetest file.

See issue #5829 for more details.

Modified:
    trunk/reactos/lib/sdk/crt/stdio/_flsbuf.c

Modified: trunk/reactos/lib/sdk/crt/stdio/_flsbuf.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/sdk/crt/stdio/_flsbuf.…
==============================================================================
--- trunk/reactos/lib/sdk/crt/stdio/_flsbuf.c [iso-8859-1] (original)
+++ trunk/reactos/lib/sdk/crt/stdio/_flsbuf.c [iso-8859-1] Wed Jun  1 12:08:02 2011
@@ -24,6 +24,9 @@
         return EOF;
     }
 
+    /* Always reset _cnt */
+    stream->_cnt = 0;
+
     /* Check if this was a read buffer */
     if (stream->_flag & _IOREAD)
     {
@@ -31,7 +34,6 @@
         if (!(stream->_flag & _IOEOF))
         {
             stream->_flag |= _IOERR;
-            stream->_cnt = 0;
             return EOF;
         }
 
@@ -43,16 +45,17 @@
     stream->_flag &= ~(_IOREAD|_IOEOF);
     stream->_flag |= _IOWRT;
 
-    /* If we have no buffer, try to allocate one */
-    if (!stream->_base && stream != stdout && stream != stderr)
+    /* Check if should get a buffer */
+    if (!(stream->_flag & _IONBF) && stream != stdout && stream !=
stderr)
     {
-        alloc_buffer(stream);
+        /* If we have no buffer, try to allocate one */
+        if (!stream->_base) alloc_buffer(stream);
     }
 
-    /* Check if we have a buffer now */
-    if (stream->_base)
+    /* Check if we can use a buffer now */
+    if (stream->_base && !(stream->_flag & _IONBF))
     {
-        /* We have one, check if there is something to write */
+        /* We can, check if there is something to write */
         count = stream->_ptr - stream->_base;
         if (count > 0)
             written = _write(stream->_file, stream->_base, count);