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#ifndef SCM_FPORTS_H
#define SCM_FPORTS_H
/* Copyright 1995-2001,2006,2008-2009,2011-2012,2017-2019
Free Software Foundation, Inc.
This file is part of Guile.
Guile is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Guile 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Guile. If not, see
<https://www.gnu.org/licenses/>. */
#include "libguile/gc.h"
#include "libguile/ports.h"
/* struct allocated for each buffered FPORT. */
typedef struct scm_t_fport {
/* The file descriptor. */
int fdes;
/* Revealed count; 0 indicates not revealed, > 1 revealed. */
unsigned int revealed;
/* Set of scm_fport_option flags. */
unsigned options;
} scm_t_fport;
SCM_API scm_t_port_type *scm_file_port_type;
#define SCM_FSTREAM(x) ((scm_t_fport *) SCM_STREAM (x))
#define SCM_FPORT_FDES(x) (SCM_FSTREAM (x)->fdes)
#define SCM_FPORTP(x) \
(SCM_PORTP (x) && SCM_PORT_TYPE (x) == scm_file_port_type)
#define SCM_OPFPORTP(x) (SCM_FPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_OPN))
#define SCM_OPINFPORTP(x) (SCM_OPFPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_RDNG))
#define SCM_OPOUTFPORTP(x) (SCM_OPFPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_WRTNG))
#define SCM_VALIDATE_FPORT(pos, port) \
SCM_MAKE_VALIDATE_MSG (pos, port, FPORTP, "file port")
#define SCM_VALIDATE_OPFPORT(pos, port) \
SCM_MAKE_VALIDATE_MSG (pos, port, OPFPORTP, "open file port")
SCM_API void scm_evict_ports (int fd);
SCM_INTERNAL int scm_i_mode_to_open_flags (SCM mode, int *is_binary,
const char *FUNC_NAME);
SCM_API SCM scm_open_file_with_encoding (SCM filename, SCM modes,
SCM guess_encoding, SCM encoding);
SCM_API SCM scm_open_file (SCM filename, SCM modes);
SCM_API SCM scm_fdes_to_port (int fdes, char *mode, SCM name);
SCM_API SCM scm_file_port_p (SCM obj);
/* Revealed counts. */
SCM_API int scm_revealed_count (SCM port);
SCM_API SCM scm_port_revealed (SCM port);
SCM_API SCM scm_set_port_revealed_x (SCM port, SCM rcount);
SCM_API SCM scm_adjust_port_revealed_x (SCM port, SCM addend);
SCM_INTERNAL void scm_init_fports_keywords (void);
SCM_INTERNAL void scm_init_fports (void);
/* internal functions */
#ifdef BUILDING_LIBGUILE
enum scm_fport_option
{
/* FD's that aren't created by Guile probably need to be checked for
validity. We also check that the open mode is valid. */
SCM_FPORT_OPTION_VERIFY = 1U<<0,
/* We know some ports aren't seekable and can elide a syscall in
that case. */
SCM_FPORT_OPTION_NOT_SEEKABLE = 1U<<1
};
SCM_INTERNAL int scm_i_fdes_is_valid (int fdes, long mode_bits);
SCM_INTERNAL SCM scm_i_fdes_to_port (int fdes, long mode_bits, SCM name,
unsigned options);
#endif /* BUILDING_LIBGUILE */
#endif /* SCM_FPORTS_H */
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