X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdio%2Fferror.c;h=43fad2d8f67031fde75c3cb2713a48f2a743b4fa;hp=a1855a32a7adb0eab2668539c2a97f864842cbfe;hb=da0f3f353d417fed71f358a48d5d5394145e460d;hpb=34893ecc2200dc7017c36a54cb6c5f4c2378b5ec

diff --git a/functions/stdio/ferror.c b/functions/stdio/ferror.c
index a1855a3..43fad2d 100644
--- a/functions/stdio/ferror.c
+++ b/functions/stdio/ferror.c
@@ -1,8 +1,37 @@
-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-int ferror( FILE * stream ) { /* TODO */ };
+/* ferror( 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"
+
+int _PDCLIB_ferror_unlocked( FILE * stream )
+{
+    return stream->status & _PDCLIB_ERRORFLAG;
+}
+
+int ferror( FILE * stream )
+{
+    _PDCLIB_flockfile( stream );
+    int error = _PDCLIB_ferror_unlocked( stream );
+    _PDCLIB_funlockfile( stream );
+    return error;
+}
+
+#endif
+
+#ifdef TEST
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    /* Testing covered by clearerr(). */
+    return TEST_RESULTS;
+}
+
+#endif
+