libguile/fports.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_FPORTS_H
   4 #define SCM_FPORTS_H
   5
   6 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2006, 2008 Free Software Foundation, Inc.
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but 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.
  17  *
  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 02110-1301 USA
  21  */
  22
  23 \f
  24
  25 #include "libguile/__scm.h"
  26
  27 #include "libguile/ports.h"
  28
  29 \f
  30
  31 /* struct allocated for each buffered FPORT.  */
  32 typedef struct scm_t_fport {
  33   int fdes;                     /* file descriptor.  */
  34 } scm_t_fport;
  35
  36 SCM_API scm_t_bits scm_tc16_fport;
  37
  38 #define SCM_FSTREAM(x) ((scm_t_fport *) SCM_STREAM (x))
  39 #define SCM_FPORT_FDES(x) (SCM_FSTREAM (x)->fdes)
  40
  41 #define SCM_FPORTP(x) (!SCM_IMP (x) && (SCM_TYP16 (x) == scm_tc16_fport))
  42 #define SCM_OPFPORTP(x) (SCM_FPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_OPN))
  43 #define SCM_OPINFPORTP(x) (SCM_OPFPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_RDNG))
  44 #define SCM_OPOUTFPORTP(x) (SCM_OPFPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_WRTNG))
  45
  46 /* test whether fdes supports random access.  */
  47 #define SCM_FDES_RANDOM_P(fdes) ((lseek (fdes, 0, SEEK_CUR) == -1) ? 0 : 1)
  48
  49 \f
  50 SCM_API SCM scm_setbuf0 (SCM port);
  51 SCM_API SCM scm_setvbuf (SCM port, SCM mode, SCM size);
  52 SCM_API void scm_evict_ports (int fd);
  53 SCM_API SCM scm_open_file (SCM filename, SCM modes);
  54 SCM_API SCM scm_fdes_to_port (int fdes, char *mode, SCM name);
  55 SCM_API SCM scm_file_port_p (SCM obj);
  56 SCM_INTERNAL void scm_init_fports (void);
  57
  58 /* internal functions */
  59
  60 SCM_INTERNAL SCM scm_i_fdes_to_port (int fdes, long mode_bits, SCM name);
  61 SCM_INTERNAL int scm_i_fport_truncate (SCM, SCM);
  62 SCM_INTERNAL SCM scm_i_fport_seek (SCM, SCM, int);
  63
  64
  65 #endif  /* SCM_FPORTS_H */
  66
  67 /*
  68   Local Variables:
  69   c-file-style: "gnu"
  70   End:
  71 */