X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdio%2Fclearerr.c;h=af50f14f49531523784496424da245fec0c8c81f;hb=a7a8d2f1c85c2d7760d4d3479e90466cc3a81b04;hp=6d80c8aeb381639c62b9fbf0a4194ff68b083bc7;hpb=13ee02fa27a739d9d602f801126eadcfbfeab8a8;p=pdclib

diff --git a/functions/stdio/clearerr.c b/functions/stdio/clearerr.c
index 6d80c8a..af50f14 100644
--- a/functions/stdio/clearerr.c
+++ b/functions/stdio/clearerr.c
@@ -22,8 +22,32 @@ void clearerr( struct _PDCLIB_file_t * stream )
 
 int main( void )
 {
-    TESTCASE( NO_TESTDRIVER );
+    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
+