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/* classes: h_files */
#ifndef PORTSH
#define PORTSH
/* Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of GUILE.
*
* The exception is that, if you link the GUILE library with other files
* to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the GUILE library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the
* Free Software Foundation under the name GUILE. If you copy
* code from other Free Software Foundation releases into a copy of
* GUILE, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for GUILE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice. */
#include "libguile/__scm.h"
#include "libguile/print.h"
#include "libguile/struct.h"
struct scm_port_table
{
SCM port; /* Open port. */
int revealed; /* 0 not revealed, > 1 revealed.
* Revealed ports do not get GC'd.
*/
SCM stream;
SCM file_name; /* debugging support. */
int unchr; /* pushed back character, if any */
int line_number; /* debugging support. */
int column_number; /* debugging support. */
};
extern struct scm_port_table **scm_port_table;
extern int scm_port_table_size; /* Number of ports in scm_port_table. */
#define SCM_EOF_OBJECT_P(x) ((x) == SCM_EOF_VAL)
/* PORT FLAGS
* A set of flags characterizes a port.
* Note that we reserve the bits 1 << 24 and above for use by the
* routines in the port's scm_ptobfuns structure.
*/
#define SCM_OPN (1L<<16) /* Is the port open? */
#define SCM_RDNG (2L<<16) /* Is it a readable port? */
#define SCM_WRTNG (4L<<16) /* Is it writable? */
#define SCM_BUF0 (8L<<16)
#define SCM_NOFTELL (16L<<16) /* Does ftell work on this? Yuck! */
#define SCM_CRDY (32L<<16) /* Should char-ready? return #t? */
/* A mask used to clear the char-ready port flag. */
#define SCM_CUC 0x001fffffL
#define SCM_PORTP(x) (SCM_TYP7(x)==scm_tc7_port)
#define SCM_OPPORTP(x) (((0x7f | SCM_OPN) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN))
#define SCM_OPINPORTP(x) (((0x7f | SCM_OPN | SCM_RDNG) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN | SCM_RDNG))
#define SCM_OPOUTPORTP(x) (((0x7f | SCM_OPN | SCM_WRTNG) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN | SCM_WRTNG))
#define SCM_FPORTP(x) (SCM_TYP16S(x)==scm_tc7_port)
#define SCM_OPFPORTP(x) (((0xfeff | SCM_OPN) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN))
#define SCM_OPINFPORTP(x) (((0xfeff | SCM_OPN | SCM_RDNG) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN | SCM_RDNG))
#define SCM_OPOUTFPORTP(x) (((0xfeff | SCM_OPN | SCM_WRTNG) & SCM_CAR(x))==(scm_tc7_port | SCM_OPN | SCM_WRTNG))
#define SCM_INPORTP(x) (((0x7f | SCM_RDNG) & SCM_CAR(x))==(scm_tc7_port | SCM_RDNG))
#define SCM_OUTPORTP(x) (((0x7f | SCM_WRTNG) & SCM_CAR(x))==(scm_tc7_port | SCM_WRTNG))
#define SCM_OPENP(x) (SCM_OPN & SCM_CAR(x))
#define SCM_CLOSEDP(x) (!SCM_OPENP(x))
#define SCM_PTAB_ENTRY(x) ((struct scm_port_table *)SCM_CDR(x))
#define SCM_SETPTAB_ENTRY(x,ent) SCM_SETCDR ((x), (SCM)(ent))
#define SCM_STREAM(x) SCM_PTAB_ENTRY(x)->stream
#define SCM_SETSTREAM(x,s) (SCM_PTAB_ENTRY(x)->stream = s)
#define SCM_FILENAME(x) SCM_PTAB_ENTRY(x)->file_name
#define SCM_LINUM(x) SCM_PTAB_ENTRY(x)->line_number
#define SCM_COL(x) SCM_PTAB_ENTRY(x)->column_number
#define SCM_REVEALED(x) SCM_PTAB_ENTRY(x)->revealed
#define SCM_SETREVEALED(x,s) (SCM_PTAB_ENTRY(x)->revealed = s)
#define SCM_CRDYP(port) (SCM_CAR (port) & SCM_CRDY)
#define SCM_CLRDY(port) {SCM_SETAND_CAR (port, SCM_CUC);}
#define SCM_SETRDY(port) {SCM_SETOR_CAR (port, SCM_CRDY);}
#define SCM_CUNGET(c,port) {SCM_PTAB_ENTRY(port)->unchr = c; SCM_SETRDY(port);}
#define SCM_CGETUN(port) (SCM_PTAB_ENTRY(port)->unchr)
#define SCM_INCLINE(port) {SCM_LINUM (port) += 1; SCM_COL (port) = 0;}
#define SCM_INCCOL(port) {SCM_COL (port) += 1;}
#define SCM_TABCOL(port) {SCM_COL (port) += 8 - SCM_COL (port) % 8;}
typedef struct scm_ptobfuns
{
SCM (*mark) (SCM);
int (*free) (SCM);
int (*print) (SCM exp, SCM port, scm_print_state *pstate);
SCM (*equalp) (SCM, SCM);
int (*fputc) (int, SCM port);
int (*fputs) (char *, SCM port);
scm_sizet (*fwrite) SCM_P ((char *ptr,
scm_sizet size,
scm_sizet nitems,
SCM port));
int (*fflush) (SCM port);
int (*fgetc) (SCM port);
char * (*fgets) (SCM port, int *len);
int (*fclose) (SCM port);
} scm_ptobfuns;
#define SCM_PTOBNUM(x) (0x0ff & (SCM_CAR(x)>>8))
extern scm_ptobfuns *scm_ptobs;
extern int scm_numptob;
extern int scm_port_table_room;
extern SCM scm_markstream SCM_P ((SCM ptr));
extern long scm_newptob SCM_P ((scm_ptobfuns *ptob));
extern SCM scm_char_ready_p SCM_P ((SCM port));
extern SCM scm_current_input_port SCM_P ((void));
extern SCM scm_current_output_port SCM_P ((void));
extern SCM scm_current_error_port SCM_P ((void));
extern SCM scm_current_load_port SCM_P ((void));
extern SCM scm_set_current_input_port SCM_P ((SCM port));
extern SCM scm_set_current_output_port SCM_P ((SCM port));
extern SCM scm_set_current_error_port SCM_P ((SCM port));
extern struct scm_port_table * scm_add_to_port_table SCM_P ((SCM port));
extern void scm_remove_from_port_table SCM_P ((SCM port));
extern SCM scm_pt_size SCM_P ((void));
extern SCM scm_pt_member SCM_P ((SCM member));
extern int scm_revealed_count SCM_P ((SCM port));
extern SCM scm_port_revealed SCM_P ((SCM port));
extern SCM scm_set_port_revealed_x SCM_P ((SCM port, SCM rcount));
extern long scm_mode_bits SCM_P ((char *modes));
extern SCM scm_port_mode SCM_P ((SCM port));
extern SCM scm_close_port SCM_P ((SCM port));
extern SCM scm_close_all_ports_except SCM_P ((SCM ports));
extern SCM scm_input_port_p SCM_P ((SCM x));
extern SCM scm_output_port_p SCM_P ((SCM x));
extern SCM scm_eof_object_p SCM_P ((SCM x));
extern SCM scm_force_output SCM_P ((SCM port));
extern SCM scm_flush_all_ports SCM_P ((void));
extern SCM scm_read_char SCM_P ((SCM port));
extern SCM scm_peek_char SCM_P ((SCM port));
extern SCM scm_unread_char SCM_P ((SCM cobj, SCM port));
extern char *scm_generic_fgets SCM_P ((SCM port, int *len));
extern SCM scm_port_line SCM_P ((SCM port));
extern SCM scm_set_port_line_x SCM_P ((SCM port, SCM line));
extern SCM scm_port_column SCM_P ((SCM port));
extern SCM scm_set_port_column_x SCM_P ((SCM port, SCM line));
extern SCM scm_port_filename SCM_P ((SCM port));
extern SCM scm_set_port_filename_x SCM_P ((SCM port, SCM filename));
extern void scm_prinport SCM_P ((SCM exp, SCM port, char *type));
extern void scm_ports_prehistory SCM_P ((void));
extern SCM scm_void_port SCM_P ((char * mode_str));
extern SCM scm_sys_make_void_port SCM_P ((SCM mode));
extern void scm_init_ports SCM_P ((void));
#ifdef GUILE_DEBUG
extern SCM scm_pt_size SCM_P ((void));
extern SCM scm_pt_member SCM_P ((SCM member));
#endif GUILE_DEBUG
#endif /* PORTSH */
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