6 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2006, 2008, 2009, 2011, 2012 Free Software Foundation, Inc.
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public License
10 * as published by the Free Software Foundation; either version 3 of
11 * the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
26 #include "libguile/__scm.h"
28 #include "libguile/ports.h"
32 /* struct allocated for each buffered FPORT. */
33 typedef struct scm_t_fport
{
34 int fdes
; /* file descriptor. */
35 int revealed
; /* 0 not revealed, > 1 revealed.
36 * Revealed ports do not get GC'd.
40 SCM_API scm_t_bits scm_tc16_fport
;
42 #define SCM_FSTREAM(x) ((scm_t_fport *) SCM_STREAM (x))
43 #define SCM_FPORT_FDES(x) (SCM_FSTREAM (x)->fdes)
45 #define SCM_FPORTP(x) (SCM_HAS_TYP16 (x, scm_tc16_fport))
46 #define SCM_OPFPORTP(x) (SCM_FPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_OPN))
47 #define SCM_OPINFPORTP(x) (SCM_OPFPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_RDNG))
48 #define SCM_OPOUTFPORTP(x) (SCM_OPFPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_WRTNG))
50 /* test whether fdes supports random access. */
51 #define SCM_FDES_RANDOM_P(fdes) ((lseek (fdes, 0, SEEK_CUR) == -1) ? 0 : 1)
54 SCM_API SCM
scm_setbuf0 (SCM port
);
55 SCM_API SCM
scm_setvbuf (SCM port
, SCM mode
, SCM size
);
56 SCM_API
void scm_evict_ports (int fd
);
57 SCM_API SCM
scm_open_file (SCM filename
, SCM modes
);
58 SCM_API SCM
scm_fdes_to_port (int fdes
, char *mode
, SCM name
);
59 SCM_API SCM
scm_file_port_p (SCM obj
);
62 /* Revealed counts. */
63 SCM_API
int scm_revealed_count (SCM port
);
64 SCM_API SCM
scm_port_revealed (SCM port
);
65 SCM_API SCM
scm_set_port_revealed_x (SCM port
, SCM rcount
);
66 SCM_API SCM
scm_adjust_port_revealed_x (SCM port
, SCM addend
);
69 SCM_INTERNAL
void scm_init_fports (void);
71 /* internal functions */
73 SCM_INTERNAL SCM
scm_i_fdes_to_port (int fdes
, long mode_bits
, SCM name
);
76 #endif /* SCM_FPORTS_H */