X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdio%2Fftell.c;h=af6542c0d713edd797eaeb80a5fdc6aeb3379a7a;hb=b1fc26afebd4d557ff89a44bc21767a8704c3809;hp=29c360a2fd55d82f1d8569c67c6c3332e5f7fef2;hpb=ef6aa72f40326153ba99e833340ace354799ed95;p=pdclib

diff --git a/functions/stdio/ftell.c b/functions/stdio/ftell.c
index 29c360a..af6542c 100644
--- a/functions/stdio/ftell.c
+++ b/functions/stdio/ftell.c
@@ -1,5 +1,3 @@
-/* $Id$ */
-
 /* ftell( FILE * )
 
    This file is part of the Public Domain C Library (PDCLib).
@@ -62,6 +60,13 @@ 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' );