[bpt/guile.git] / libguile / ports.h

/* classes: h_files */

#ifndef PORTSH
#define PORTSH
/*	Copyright (C) 1995,1996,1997,1998,1999 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.  */
\f
#include "libguile/__scm.h"

#include "libguile/print.h"
#include "libguile/struct.h"

/* Not sure if this is a good idea.  We need it for off_t.  */
#include <sys/types.h>

\f

#define SCM_INITIAL_PUTBACK_BUF_SIZE 4

/* values for the rw_active flag.  */
enum scm_port_rw_active {
  SCM_PORT_NEITHER = 0,
  SCM_PORT_READ = 1,
  SCM_PORT_WRITE = 2
};

/* C representation of a Scheme port.  */

typedef struct 
{
  SCM port;			/* Link back to the port object.  */
  int entry;			/* Index in port table. */
  int revealed;			/* 0 not revealed, > 1 revealed.
				 * Revealed ports do not get GC'd.
				 */
  /* data for the underlying port implementation.  may be an SCM cell or 
     cast to a pointer to C data.  */
  SCM stream;

  SCM file_name;		/* debugging support.  */
  int line_number;		/* debugging support.  */
  int column_number;		/* debugging support.  */

  /* port buffers.  the buffer(s) are set up for all ports.  
     in the case of string ports, the buffer is the string itself.
     in the case of unbuffered file ports, the buffer is a
     single char: shortbuf.  */

  /* this buffer is filled from read_buf to read_end using the ptob 
     buffer_fill.  then input requests are taken from read_pos until
     it reaches read_end.  */

  unsigned char *read_buf;	/* buffer start.  */
  const unsigned char *read_pos;/* the next unread char.  */
  unsigned char *read_end;      /* pointer to last buffered char + 1.  */
  off_t read_buf_size;		/* size of the buffer.  */

  /* when chars are put back into the buffer, e.g., using peek-char or
     unread-string, the read-buffer pointers are switched to cbuf.
     the original pointers are saved here and restored when the put-back
     chars have been consumed.  */
  unsigned char *saved_read_buf;
  const unsigned char *saved_read_pos;
  unsigned char *saved_read_end;
  off_t saved_read_buf_size;

  /* write requests are saved into this buffer at write_pos until it
     reaches write_buf + write_buf_size, then the ptob flush is
     called.  */

  unsigned char *write_buf;     /* buffer start.  */
  unsigned char *write_pos;     /* pointer to last buffered char + 1.  */
  unsigned char *write_end;     /* pointer to end of buffer + 1.  */
  off_t write_buf_size;		/* size of the buffer.  */

  unsigned char shortbuf;       /* buffer for "unbuffered" streams.  */

  int rw_random;                /* true if the port is bidirectional and
				   random access.  implies that the buffers
				   must be flushed before switching between
				   reading and writing.  */

  enum scm_port_rw_active rw_active; /* for bidirectional random
				   ports, indicates which of the
				   buffers is currently in use.  can
				   be SCM_PORT_WRITE, SCM_PORT_READ,
				   or 0.  */


  /* a buffer for un-read chars and strings.  */
  unsigned char *putback_buf;
  int putback_buf_size;        /* allocated size of putback_buf.  */
} scm_port;

extern scm_port **scm_port_table;
extern int scm_port_table_size; /* Number of ports in scm_port_table.  */


\f

#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) /* Is it unbuffered? */
/* #define SCM_CRDY	(32L<<16)  obsolete, for pushed back characters  */
#define SCM_BUFLINE     (64L<<16) /* Is it line-buffered? */

#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_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) ((scm_port *) 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 = (SCM) 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_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;}

\f

/* port-type description.  */
typedef struct scm_ptob_descriptor
{
  char *name;
  SCM (*mark) (SCM);
  scm_sizet (*free) (SCM);
  int (*print) (SCM exp, SCM port, scm_print_state *pstate);
  SCM (*equalp) (SCM, SCM);
  int (*close) (SCM port);

  void (*write) (SCM port, void *data, size_t size);
  void (*flush) (SCM port);

  void (*end_input) (SCM port, int offset);
  int (*fill_input) (SCM port);
  int (*input_waiting) (SCM port);

  off_t (*seek) (SCM port, off_t OFFSET, int WHENCE);
  void (*truncate) (SCM port, off_t length);

} scm_ptob_descriptor;

#define SCM_TC2PTOBNUM(x) (0x0ff & ((x) >> 8))
#define SCM_PTOBNUM(x) (SCM_TC2PTOBNUM (SCM_CAR (x)))
/* SCM_PTOBNAME can be 0 if name is missing */
#define SCM_PTOBNAME(ptobnum) scm_ptobs[ptobnum].name

\f

extern scm_ptob_descriptor *scm_ptobs;
extern int scm_numptob;
extern int scm_port_table_room;

\f

extern SCM scm_markstream SCM_P ((SCM ptr));
extern long scm_make_port_type (char *name,
				int (*fill_input) (SCM port),
				void (*write) (SCM port, void *data,
					       size_t size));
extern void scm_set_port_mark (long tc, SCM (*mark) (SCM));
extern void scm_set_port_free (long tc, scm_sizet (*free) (SCM));
extern void scm_set_port_print (long tc,
				int (*print) (SCM exp,
					      SCM port,
					      scm_print_state *pstate));
extern void scm_set_port_equalp (long tc, SCM (*equalp) (SCM, SCM));
extern void scm_set_port_close (long tc, int (*close) (SCM));

extern void scm_set_port_flush (long tc, 
				void (*flush) (SCM port));
extern void scm_set_port_end_input (long tc,
				    void (*end_input) (SCM port,
						       int offset));
extern void scm_set_port_seek (long tc,
			       off_t (*seek) (SCM port,
					      off_t OFFSET,
					      int WHENCE));
extern void scm_set_port_truncate (long tc,
				   void (*truncate) (SCM port,
						     off_t length));
extern void scm_set_port_input_waiting (long tc, int (*input_waiting) (SCM));
extern SCM scm_char_ready_p SCM_P ((SCM port));
extern SCM scm_drain_input (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 scm_port * scm_add_to_port_table SCM_P ((SCM port));
extern void scm_remove_from_port_table SCM_P ((SCM port));
extern void scm_grow_port_cbuf SCM_P ((SCM port, size_t requested));
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 void scm_putc SCM_P ((char c, SCM port));
extern void scm_puts SCM_P ((char *str_data, SCM port));
extern void scm_lfwrite SCM_P ((char *ptr, scm_sizet size, SCM port));
extern void scm_flush SCM_P ((SCM port));
extern void scm_end_input (SCM port);
extern int scm_fill_input (SCM port);
extern int scm_getc SCM_P ((SCM port));
extern void scm_ungetc SCM_P ((int c, SCM port));
extern void scm_ungets SCM_P ((char *s, int n, SCM port));
extern SCM scm_peek_char SCM_P ((SCM port));
extern SCM scm_unread_char SCM_P ((SCM cobj, SCM port));
extern SCM scm_unread_string SCM_P ((SCM str, SCM port));
extern char *scm_generic_fgets SCM_P ((SCM port, int *len));
extern SCM scm_seek (SCM object, SCM offset, SCM whence);
extern SCM scm_truncate_file (SCM object, SCM length);
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 int scm_port_print (SCM exp, SCM port, scm_print_state *);
extern void scm_print_port_mode (SCM exp, SCM port);
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 */
Commit	Line	Data
0f2d19dd JB	1	/* classes: h_files */
	2
	3	#ifndef PORTSH
	4	#define PORTSH
840ae05d	5	/* Copyright (C) 1995,1996,1997,1998,1999 Free Software Foundation, Inc.
0f2d19dd JB	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
82892bed JB	19	* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
82892bed JB	20	* Boston, MA 02111-1307 USA
0f2d19dd JB	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.
82892bed	44	* If you do not wish that, delete this exception notice. */
0f2d19dd	45	\f
b4309c3c	46	#include "libguile/__scm.h"
0f2d19dd	47
e0d86ad2	48	#include "libguile/print.h"
78446828	49	#include "libguile/struct.h"
e0d86ad2	50
acdb12da JB	51	/* Not sure if this is a good idea. We need it for off_t. */
	52	#include <sys/types.h>
	53
0f2d19dd JB	54	\f
0f2d19dd JB	55
6c951427	56	#define SCM_INITIAL_PUTBACK_BUF_SIZE 4
0855ef71	57
61e452ba JB	58	/* values for the rw_active flag. */
	59	enum scm_port_rw_active {
	60	SCM_PORT_NEITHER = 0,
	61	SCM_PORT_READ = 1,
	62	SCM_PORT_WRITE = 2
	63	};
	64
840ae05d JB	65	/* C representation of a Scheme port. */
	66
	67	typedef struct
0f2d19dd	68	{
ee149d03	69	SCM port; /* Link back to the port object. */
0855ef71	70	int entry; /* Index in port table. */
0f2d19dd JB	71	int revealed; /* 0 not revealed, > 1 revealed.
	72	* Revealed ports do not get GC'd.
	73	*/
840ae05d JB	74	/* data for the underlying port implementation. may be an SCM cell or
840ae05d JB	75	cast to a pointer to C data. */
0f2d19dd	76	SCM stream;
0f2d19dd	77
0855ef71	78	SCM file_name; /* debugging support. */
ebf7394e GH	79	int line_number; /* debugging support. */
ebf7394e GH	80	int column_number; /* debugging support. */
0855ef71	81
ee149d03 JB	82	/* port buffers. the buffer(s) are set up for all ports.
	83	in the case of string ports, the buffer is the string itself.
	84	in the case of unbuffered file ports, the buffer is a
	85	single char: shortbuf. */
	86
	87	/* this buffer is filled from read_buf to read_end using the ptob
	88	buffer_fill. then input requests are taken from read_pos until
	89	it reaches read_end. */
	90
	91	unsigned char read_buf; / buffer start. */
840ae05d	92	const unsigned char read_pos;/ the next unread char. */
ee149d03	93	unsigned char read_end; / pointer to last buffered char + 1. */
840ae05d	94	off_t read_buf_size; /* size of the buffer. */
ee149d03	95
6c951427 GH	96	/* when chars are put back into the buffer, e.g., using peek-char or
	97	unread-string, the read-buffer pointers are switched to cbuf.
	98	the original pointers are saved here and restored when the put-back
	99	chars have been consumed. */
	100	unsigned char *saved_read_buf;
	101	const unsigned char *saved_read_pos;
	102	unsigned char *saved_read_end;
	103	off_t saved_read_buf_size;
	104
ee149d03 JB	105	/* write requests are saved into this buffer at write_pos until it
	106	reaches write_buf + write_buf_size, then the ptob flush is
	107	called. */
	108
6c951427	109	unsigned char write_buf; / buffer start. */
ee149d03 JB	110	unsigned char write_pos; / pointer to last buffered char + 1. */
ee149d03 JB	111	unsigned char write_end; / pointer to end of buffer + 1. */
840ae05d	112	off_t write_buf_size; /* size of the buffer. */
ee149d03 JB	113
	114	unsigned char shortbuf; /* buffer for "unbuffered" streams. */
	115
840ae05d JB	116	int rw_random; /* true if the port is bidirectional and
	117	random access. implies that the buffers
	118	must be flushed before switching between
	119	reading and writing. */
	120
61e452ba JB	121	enum scm_port_rw_active rw_active; /* for bidirectional random
	122	ports, indicates which of the
	123	buffers is currently in use. can
	124	be SCM_PORT_WRITE, SCM_PORT_READ,
840ae05d	125	or 0. */
ee149d03	126
61e452ba	127
6c951427 GH	128	/* a buffer for un-read chars and strings. */
	129	unsigned char *putback_buf;
	130	int putback_buf_size; /* allocated size of putback_buf. */
840ae05d JB	131	} scm_port;
840ae05d JB	132
840ae05d	133	extern scm_port **scm_port_table;
0f82baf6	134	extern int scm_port_table_size; /* Number of ports in scm_port_table. */
0f2d19dd JB	135
	136
	137	\f
	138
0c32d76c MD	139	#define SCM_EOF_OBJECT_P(x) ((x) == SCM_EOF_VAL)
0c32d76c MD	140
0f2d19dd	141	/* PORT FLAGS
dbece3a2	142	* A set of flags characterizes a port.
571031dc JB	143	* Note that we reserve the bits 1 << 24 and above for use by the
571031dc JB	144	* routines in the port's scm_ptobfuns structure.
0f2d19dd JB	145	*/
	146	#define SCM_OPN (1L<<16) /* Is the port open? */
	147	#define SCM_RDNG (2L<<16) /* Is it a readable port? */
	148	#define SCM_WRTNG (4L<<16) /* Is it writable? */
ee149d03	149	#define SCM_BUF0 (8L<<16) /* Is it unbuffered? */
6c951427	150	/* #define SCM_CRDY (32L<<16) obsolete, for pushed back characters */
ee149d03	151	#define SCM_BUFLINE (64L<<16) /* Is it line-buffered? */
0f2d19dd	152
0f2d19dd JB	153	#define SCM_PORTP(x) (SCM_TYP7(x)==scm_tc7_port)
	154	#define SCM_OPPORTP(x) (((0x7f \| SCM_OPN) & SCM_CAR(x))==(scm_tc7_port \| SCM_OPN))
	155	#define SCM_OPINPORTP(x) (((0x7f \| SCM_OPN \| SCM_RDNG) & SCM_CAR(x))==(scm_tc7_port \| SCM_OPN \| SCM_RDNG))
	156	#define SCM_OPOUTPORTP(x) (((0x7f \| SCM_OPN \| SCM_WRTNG) & SCM_CAR(x))==(scm_tc7_port \| SCM_OPN \| SCM_WRTNG))
0f2d19dd JB	157	#define SCM_INPORTP(x) (((0x7f \| SCM_RDNG) & SCM_CAR(x))==(scm_tc7_port \| SCM_RDNG))
	158	#define SCM_OUTPORTP(x) (((0x7f \| SCM_WRTNG) & SCM_CAR(x))==(scm_tc7_port \| SCM_WRTNG))
	159	#define SCM_OPENP(x) (SCM_OPN & SCM_CAR(x))
	160	#define SCM_CLOSEDP(x) (!SCM_OPENP(x))
840ae05d	161	#define SCM_PTAB_ENTRY(x) ((scm_port *) SCM_CDR(x))
0f2d19dd JB	162	#define SCM_SETPTAB_ENTRY(x,ent) SCM_SETCDR ((x), (SCM)(ent))
0f2d19dd JB	163	#define SCM_STREAM(x) SCM_PTAB_ENTRY(x)->stream
ee149d03	164	#define SCM_SETSTREAM(x,s) (SCM_PTAB_ENTRY(x)->stream = (SCM) s)
d14af9f2	165	#define SCM_FILENAME(x) SCM_PTAB_ENTRY(x)->file_name
0f2d19dd JB	166	#define SCM_LINUM(x) SCM_PTAB_ENTRY(x)->line_number
	167	#define SCM_COL(x) SCM_PTAB_ENTRY(x)->column_number
	168	#define SCM_REVEALED(x) SCM_PTAB_ENTRY(x)->revealed
	169	#define SCM_SETREVEALED(x,s) (SCM_PTAB_ENTRY(x)->revealed = s)
0f2d19dd JB	170
	171	#define SCM_INCLINE(port) {SCM_LINUM (port) += 1; SCM_COL (port) = 0;}
	172	#define SCM_INCCOL(port) {SCM_COL (port) += 1;}
d14af9f2	173	#define SCM_TABCOL(port) {SCM_COL (port) += 8 - SCM_COL (port) % 8;}
0f2d19dd	174
0f2d19dd JB	175	\f
0f2d19dd JB	176
affc96b5	177	/* port-type description. */
f12733c9	178	typedef struct scm_ptob_descriptor
0f82baf6	179	{
f12733c9	180	char *name;
0c0669cc	181	SCM (*mark) (SCM);
f12733c9	182	scm_sizet (*free) (SCM);
0c0669cc JB	183	int (print) (SCM exp, SCM port, scm_print_state pstate);
0c0669cc JB	184	SCM (*equalp) (SCM, SCM);
affc96b5 GH	185	int (*close) (SCM port);
affc96b5 GH	186
31703ab8	187	void (write) (SCM port, void data, size_t size);
affc96b5 GH	188	void (*flush) (SCM port);
	189
	190	void (*end_input) (SCM port, int offset);
	191	int (*fill_input) (SCM port);
	192	int (*input_waiting) (SCM port);
	193
ee149d03	194	off_t (*seek) (SCM port, off_t OFFSET, int WHENCE);
affc96b5 GH	195	void (*truncate) (SCM port, off_t length);
affc96b5 GH	196
f12733c9	197	} scm_ptob_descriptor;
0f82baf6	198
f12733c9 MD	199	#define SCM_TC2PTOBNUM(x) (0x0ff & ((x) >> 8))
	200	#define SCM_PTOBNUM(x) (SCM_TC2PTOBNUM (SCM_CAR (x)))
	201	/* SCM_PTOBNAME can be 0 if name is missing */
	202	#define SCM_PTOBNAME(ptobnum) scm_ptobs[ptobnum].name
0f82baf6 JB	203
	204	\f
	205
f12733c9	206	extern scm_ptob_descriptor *scm_ptobs;
a1c95c45	207	extern int scm_numptob;
0f2d19dd JB	208	extern int scm_port_table_room;
	209
	210	\f
0f2d19dd	211
1717856b	212	extern SCM scm_markstream SCM_P ((SCM ptr));
f12733c9	213	extern long scm_make_port_type (char *name,
affc96b5 GH	214	int (*fill_input) (SCM port),
	215	void (write) (SCM port, void data,
	216	size_t size));
6c747373 MD	217	extern void scm_set_port_mark (long tc, SCM (*mark) (SCM));
	218	extern void scm_set_port_free (long tc, scm_sizet (*free) (SCM));
	219	extern void scm_set_port_print (long tc,
f12733c9 MD	220	int (*print) (SCM exp,
	221	SCM port,
	222	scm_print_state *pstate));
6c747373	223	extern void scm_set_port_equalp (long tc, SCM (*equalp) (SCM, SCM));
6c747373	224	extern void scm_set_port_close (long tc, int (*close) (SCM));
affc96b5 GH	225
	226	extern void scm_set_port_flush (long tc,
	227	void (*flush) (SCM port));
	228	extern void scm_set_port_end_input (long tc,
	229	void (*end_input) (SCM port,
	230	int offset));
6c747373	231	extern void scm_set_port_seek (long tc,
f12733c9 MD	232	off_t (*seek) (SCM port,
	233	off_t OFFSET,
	234	int WHENCE));
6c747373	235	extern void scm_set_port_truncate (long tc,
f12733c9 MD	236	void (*truncate) (SCM port,
f12733c9 MD	237	off_t length));
affc96b5	238	extern void scm_set_port_input_waiting (long tc, int (*input_waiting) (SCM));
1717856b	239	extern SCM scm_char_ready_p SCM_P ((SCM port));
ee149d03	240	extern SCM scm_drain_input (SCM port);
1717856b JB	241	extern SCM scm_current_input_port SCM_P ((void));
	242	extern SCM scm_current_output_port SCM_P ((void));
	243	extern SCM scm_current_error_port SCM_P ((void));
a1c95c45	244	extern SCM scm_current_load_port SCM_P ((void));
1717856b JB	245	extern SCM scm_set_current_input_port SCM_P ((SCM port));
	246	extern SCM scm_set_current_output_port SCM_P ((SCM port));
	247	extern SCM scm_set_current_error_port SCM_P ((SCM port));
840ae05d	248	extern scm_port * scm_add_to_port_table SCM_P ((SCM port));
1717856b	249	extern void scm_remove_from_port_table SCM_P ((SCM port));
0855ef71	250	extern void scm_grow_port_cbuf SCM_P ((SCM port, size_t requested));
1717856b JB	251	extern SCM scm_pt_size SCM_P ((void));
	252	extern SCM scm_pt_member SCM_P ((SCM member));
	253	extern int scm_revealed_count SCM_P ((SCM port));
	254	extern SCM scm_port_revealed SCM_P ((SCM port));
	255	extern SCM scm_set_port_revealed_x SCM_P ((SCM port, SCM rcount));
eadd48de GH	256	extern long scm_mode_bits SCM_P ((char *modes));
eadd48de GH	257	extern SCM scm_port_mode SCM_P ((SCM port));
1717856b JB	258	extern SCM scm_close_port SCM_P ((SCM port));
	259	extern SCM scm_close_all_ports_except SCM_P ((SCM ports));
	260	extern SCM scm_input_port_p SCM_P ((SCM x));
	261	extern SCM scm_output_port_p SCM_P ((SCM x));
	262	extern SCM scm_eof_object_p SCM_P ((SCM x));
	263	extern SCM scm_force_output SCM_P ((SCM port));
89ea5b7c	264	extern SCM scm_flush_all_ports SCM_P ((void));
1717856b	265	extern SCM scm_read_char SCM_P ((SCM port));
265e6a4d	266	extern void scm_putc SCM_P ((char c, SCM port));
ee149d03 JB	267	extern void scm_puts SCM_P ((char *str_data, SCM port));
ee149d03 JB	268	extern void scm_lfwrite SCM_P ((char *ptr, scm_sizet size, SCM port));
affc96b5 GH	269	extern void scm_flush SCM_P ((SCM port));
	270	extern void scm_end_input (SCM port);
	271	extern int scm_fill_input (SCM port);
ee149d03 JB	272	extern int scm_getc SCM_P ((SCM port));
	273	extern void scm_ungetc SCM_P ((int c, SCM port));
	274	extern void scm_ungets SCM_P ((char *s, int n, SCM port));
1717856b JB	275	extern SCM scm_peek_char SCM_P ((SCM port));
1717856b JB	276	extern SCM scm_unread_char SCM_P ((SCM cobj, SCM port));
0855ef71	277	extern SCM scm_unread_string SCM_P ((SCM str, SCM port));
848f2a01	278	extern char scm_generic_fgets SCM_P ((SCM port, int len));
9cd4dfbb	279	extern SCM scm_seek (SCM object, SCM offset, SCM whence);
69bc9ff3	280	extern SCM scm_truncate_file (SCM object, SCM length);
1717856b	281	extern SCM scm_port_line SCM_P ((SCM port));
a1c95c45	282	extern SCM scm_set_port_line_x SCM_P ((SCM port, SCM line));
1717856b	283	extern SCM scm_port_column SCM_P ((SCM port));
a1c95c45	284	extern SCM scm_set_port_column_x SCM_P ((SCM port, SCM line));
1717856b JB	285	extern SCM scm_port_filename SCM_P ((SCM port));
1717856b JB	286	extern SCM scm_set_port_filename_x SCM_P ((SCM port, SCM filename));
f12733c9 MD	287	extern int scm_port_print (SCM exp, SCM port, scm_print_state *);
f12733c9 MD	288	extern void scm_print_port_mode (SCM exp, SCM port);
1717856b JB	289	extern void scm_ports_prehistory SCM_P ((void));
	290	extern SCM scm_void_port SCM_P ((char * mode_str));
	291	extern SCM scm_sys_make_void_port SCM_P ((SCM mode));
	292	extern void scm_init_ports SCM_P ((void));
0f2d19dd	293
f3667f52 JB	294	#ifdef GUILE_DEBUG
	295	extern SCM scm_pt_size SCM_P ((void));
	296	extern SCM scm_pt_member SCM_P ((SCM member));
be1cd096	297	#endif /* GUILE_DEBUG */
f3667f52	298
0f2d19dd	299	#endif /* PORTSH */