X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdio%2Fclearerr.c;h=4c51d714f54aefb4c019a6b8c216bd6820d19634;hb=52e702f02142dc34a476f01ca6bf8257cc9bc7e4;hp=d54e559fe6a95dbecd241dd6a634917f61cf47f6;hpb=e5456e3c2697c4e17fc9aa3439f2e305517b4d96;p=pdclib.old

diff --git a/functions/stdio/clearerr.c b/functions/stdio/clearerr.c
index d54e559..4c51d71 100644
--- a/functions/stdio/clearerr.c
+++ b/functions/stdio/clearerr.c
@@ -1,16 +1,58 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* $Id$ */
 
-void clearerr( FILE * stream ) { /* TODO */ };
+/* clearerr( FILE * )
 
-/* PDPC code - unreviewed
+   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->errorInd = 0;
-    stream->eofInd = 0;
-    return;
+    stream->status &= ~( _PDCLIB_ERRORFLAG | _PDCLIB_EOFFLAG );
 }
-*/
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+#ifndef REGTEST
+    FILE file = { 0, { 0 }, NULL, 0, 0, 0, NULL };
+    FILE * fh = &file;
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    fh->status |= _PDCLIB_ERRORFLAG;
+    TESTCASE( ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    clearerr( fh );
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    fh->status |= _PDCLIB_EOFFLAG;
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( feof( fh ) );
+    clearerr( fh );
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    fh->status |= _PDCLIB_EOFFLAG | _PDCLIB_ERRORFLAG;
+    TESTCASE( ferror( fh ) );
+    TESTCASE( feof( fh ) );
+    clearerr( fh );
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+#else
+    /* TODO: The above is ad-hoc and PDCLib specific. A better test driver
+       should be internals-agnostic (provoking the error / eof flag by
+       "regular" operations).
+    */
+    TESTCASE( NO_TESTDRIVER );
+#endif
+    return TEST_RESULTS;
+}
+
+#endif