X-Git-Url: https://pd.if.org/git/?p=pdclib;a=blobdiff_plain;f=functions%2Fstdio%2Fftell.c;h=27e25ee9e7f209ff247ff5a03417ef538538da5d;hp=29c360a2fd55d82f1d8569c67c6c3332e5f7fef2;hb=dd71cbbfbd68cd8c653277a0c1f70ab2b179421c;hpb=bdad1f82d0c0aa0b83e8b195303d7957c578da2e

diff --git a/functions/stdio/ftell.c b/functions/stdio/ftell.c
index 29c360a..27e25ee 100644
--- a/functions/stdio/ftell.c
+++ b/functions/stdio/ftell.c
@@ -62,6 +62,13 @@ int main( void )
     FILE * fh;
     TESTCASE( ( fh = tmpfile() ) != NULL );
     TESTCASE( setvbuf( fh, buffer, _IOLBF, 4 ) == 0 );
+    /* Testing ungetc() at offset 0 */
+    rewind( fh );
+    TESTCASE( ungetc( 'x', fh ) == 'x' );
+    TESTCASE( ftell( fh ) == -1l );
+    rewind( fh );
+    TESTCASE( ftell( fh ) == 0l );
+    /* Commence "normal" tests */
     TESTCASE( fputc( '1', fh ) == '1' );
     TESTCASE( fputc( '2', fh ) == '2' );
     TESTCASE( fputc( '3', fh ) == '3' );