X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=functions%2Fstdio%2Fftell.c;h=e82ca48155e25d22e4fcacfb2f93858e3634f6c9;hb=cc343a7e1383e2f6b8309cb7cb36ab8250586cb4;hp=29c360a2fd55d82f1d8569c67c6c3332e5f7fef2;hpb=313c25209447be6129ff0fbf33ecae3d55d85179;p=pdclib.old

diff --git a/functions/stdio/ftell.c b/functions/stdio/ftell.c
index 29c360a..e82ca48 100644
--- a/functions/stdio/ftell.c
+++ b/functions/stdio/ftell.c
@@ -38,7 +38,8 @@ long int ftell( struct _PDCLIB_file_t * stream )
         _PDCLIB_errno = _PDCLIB_ERANGE;
         return -1;
     }
-    return (long int)( stream->pos.offset - ( ( (int)stream->bufend - (int)stream->bufidx ) + stream->ungetidx ) );
+    long int res = ( stream->pos.offset - ( ( (int)stream->bufend - (int)stream->bufidx ) + stream->ungetidx ) );
+    return res;
 }
 
 #endif
@@ -62,6 +63,13 @@ 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' );