[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

/* 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.  */

  int 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;

/* values for the rw_active flag.  */
#define SCM_PORT_READ 1
#define SCM_PORT_WRITE 2

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