X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdio%2Fclearerr.c;h=af50f14f49531523784496424da245fec0c8c81f;hb=a7a8d2f1c85c2d7760d4d3479e90466cc3a81b04;hp=7fcdf8e0cd84aba43f41b8f660bb1acd2a6bb770;hpb=bdb5cd8978b8ec6f0e616bdb1810c8d753e4d84b;p=pdclib

diff --git a/functions/stdio/clearerr.c b/functions/stdio/clearerr.c
index 7fcdf8e..af50f14 100644
--- a/functions/stdio/clearerr.c
+++ b/functions/stdio/clearerr.c
@@ -1,18 +1,53 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-#ifndef __FILE_H
-#define __FILE_H __FILE_H
-#include <__FILE.h>
-#endif // __FILE_H
-
-void clearerr( FILE * fh )
+/* $Id$ */
+
+/* clearerr( 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
+
+void clearerr( struct _PDCLIB_file_t * stream )
+{
+    stream->status &= ~( _PDCLIB_ERRORFLAG | _PDCLIB_EOFFLAG );
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
 {
-    fh->ErrorIndicator = 0;
-    fh->EOFIndicator = 0;
-    return;
+    FILE * fh;
+    TESTCASE( ( fh = tmpfile() ) != NULL );
+    /* Flags should be clear */
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    /* Reading from input stream - should provoke error */
+    /* FIXME: Apparently glibc disagrees on this assumption. How to provoke error on glibc? */
+    TESTCASE( fgetc( fh ) == EOF );
+    TESTCASE( ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    /* clearerr() should clear flags */
+    clearerr( fh );
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    /* Reading from empty stream - should provoke EOF */
+    rewind( fh );
+    TESTCASE( fgetc( fh ) == EOF );
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( feof( fh ) );
+    /* clearerr() should clear flags */
+    clearerr( fh );
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    TESTCASE( fclose( fh ) == 0 );
+    return TEST_RESULTS;
 }
+
+#endif
+