libguile/fports.h

   1 /* classes: h_files */
   2
   3 #ifndef FPORTSH
   4 #define FPORTSH
   5 /*      Copyright (C) 1995,1996,1997,1998,1999, 2000 Free Software Foundation, Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this software; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20  * Boston, MA 02111-1307 USA
  21  *
  22  * As a special exception, the Free Software Foundation gives permission
  23  * for additional uses of the text contained in its release of GUILE.
  24  *
  25  * The exception is that, if you link the GUILE library with other files
  26  * to produce an executable, this does not by itself cause the
  27  * resulting executable to be covered by the GNU General Public License.
  28  * Your use of that executable is in no way restricted on account of
  29  * linking the GUILE library code into it.
  30  *
  31  * This exception does not however invalidate any other reasons why
  32  * the executable file might be covered by the GNU General Public License.
  33  *
  34  * This exception applies only to the code released by the
  35  * Free Software Foundation under the name GUILE.  If you copy
  36  * code from other Free Software Foundation releases into a copy of
  37  * GUILE, as the General Public License permits, the exception does
  38  * not apply to the code that you add in this way.  To avoid misleading
  39  * anyone as to the status of such modified files, you must delete
  40  * this exception notice from them.
  41  *
  42  * If you write modifications of your own for GUILE, it is your choice
  43  * whether to permit this exception to apply to your modifications.
  44  * If you do not wish that, delete this exception notice.  */
  45
  46 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
  47    gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
  48 \f
  49
  50 #include "libguile/__scm.h"
  51
  52 #include "libguile/ports.h"
  53
  54 \f
  55
  56 /* struct allocated for each buffered FPORT.  */
  57 typedef struct scm_fport_t {
  58   int fdes;                     /* file descriptor.  */
  59 } scm_fport_t;
  60
  61 #if (SCM_DEBUG_DEPRECATED == 0)
  62 # define scm_fport scm_fport_t
  63 #endif
  64
  65 extern scm_bits_t scm_tc16_fport;
  66
  67 #define SCM_FSTREAM(x) ((scm_fport_t *) SCM_STREAM (x))
  68 #define SCM_FPORT_FDES(x) (SCM_FSTREAM (x)->fdes)
  69
  70 #define SCM_FPORTP(x) (!SCM_IMP (x) && (SCM_TYP16 (x) == scm_tc16_fport))
  71 #define SCM_OPFPORTP(x) (SCM_FPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_OPN))
  72 #define SCM_OPINFPORTP(x) (SCM_OPFPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_RDNG))
  73 #define SCM_OPOUTFPORTP(x) (SCM_OPFPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_WRTNG))
  74
  75 /* test whether fdes supports random access.  */
  76 #define SCM_FDES_RANDOM_P(fdes) ((lseek (fdes, 0, SEEK_CUR) == -1) ? 0 : 1)
  77
  78 \f
  79 extern SCM scm_setbuf0 (SCM port);
  80 extern SCM scm_setvbuf (SCM port, SCM mode, SCM size);
  81 extern void scm_evict_ports (int fd);
  82 extern SCM scm_open_file (SCM filename, SCM modes);
  83 extern SCM scm_fdes_to_port (int fdes, char *mode, SCM name);
  84 extern SCM scm_file_port_p (SCM obj);
  85 extern void scm_init_fports (void);
  86
  87 #endif  /* FPORTSH */
  88
  89 /*
  90   Local Variables:
  91   c-file-style: "gnu"
  92   End:
  93 */