-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-int fflush( FILE * stream ) { /* TODO */ };
+/* $Id$ */
+
+/* fflush( FILE * )
+
+ This file is part of the Public Domain C Library (PDCLib).
+ Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <stdio.h>
+
+#ifndef REGTEST
+#include <_PDCLIB_io.h>
+
+extern FILE * _PDCLIB_filelist;
+
+int _PDCLIB_fflush_unlocked( FILE * stream )
+{
+ if ( stream == NULL )
+ {
+ stream = _PDCLIB_filelist;
+ /* TODO: Check what happens when fflush( NULL ) encounters write errors, in other libs */
+ int rc = 0;
+ while ( stream != NULL )
+ {
+ if ( stream->status & _PDCLIB_FWRITE )
+ {
+ if ( _PDCLIB_flushbuffer( stream ) == EOF )
+ {
+ rc = EOF;
+ }
+ }
+ stream = stream->next;
+ }
+ return rc;
+ }
+ else
+ {
+ return _PDCLIB_flushbuffer( stream );
+ }
+}
+
+int fflush( FILE * stream )
+{
+ _PDCLIB_flockfile( stream );
+ int res = _PDCLIB_fflush_unlocked(stream);
+ _PDCLIB_funlockfile( stream );
+ return res;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+ /* Testing covered by ftell.c */
+ return TEST_RESULTS;
+}
+
+#endif
+