-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-int fsetpos( FILE * stream, const fpos_t * pos ) { /* TODO */ };
+/* $Id$ */
+
+/* fsetpos( FILE *, const fpos_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>
+
+#ifndef REGTEST
+#include <_PDCLIB_io.h>
+
+int fsetpos_unlocked( FILE * stream,
+ const _PDCLIB_fpos_t * pos )
+{
+ if ( stream->status & _PDCLIB_FWRITE )
+ {
+ if ( _PDCLIB_flushbuffer( stream ) == EOF )
+ {
+ return EOF;
+ }
+ }
+ if ( _PDCLIB_seek( stream, pos->offset, SEEK_SET ) == EOF )
+ {
+ return EOF;
+ }
+ stream->pos.mbs = pos->mbs;
+
+ return 0;
+}
+
+int fsetpos( FILE * stream,
+ const _PDCLIB_fpos_t * pos )
+{
+ flockfile( stream );
+ int res = fsetpos_unlocked( stream, pos );
+ funlockfile( stream );
+ return res;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+ /* fsetpos() tested together with fsetpos(). */
+ return TEST_RESULTS;
+}
+
+#endif