+/* $Id$ */
+
+/* _PDCLIB_prepwrite( struct _PDCLIB_file_t * )
+
+ 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>
+
+int _PDCLIB_prepwrite( struct _PDCLIB_file_t * stream )
+{
+ if ( ( stream->bufidx < stream->bufend ) || ( stream->ungetidx > 0 ) ||
+ ( stream->status & ( _PDCLIB_FREAD | _PDCLIB_ERRORFLAG | _PDCLIB_WIDESTREAM | _PDCLIB_EOFFLAG ) ) ||
+ ! ( stream->status & ( _PDCLIB_FWRITE | _PDCLIB_FAPPEND | _PDCLIB_FRW ) ) )
+ {
+ _PDCLIB_errno = _PDCLIB_EIO;
+ stream->status |= _PDCLIB_ERRORFLAG;
+ return EOF;
+ }
+ stream->status |= _PDCLIB_FWRITE | _PDCLIB_BYTESTREAM;
+ return 0;
+}
+