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dbc93d6195
* libguile/fports.c (scm_i_fdes_is_valid): New internal helper. (scm_i_fdes_to_port): Use new helper. * libguile/fports.h: Declare new helper. * libguile/init.c (scm_standard_stream_to_port): Refactor to use scm_i_fdes_is_valid.
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
#ifndef SCM_FPORTS_H
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#define SCM_FPORTS_H
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/* Copyright 1995-2001,2006,2008-2009,2011-2012,2017-2019
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Free Software Foundation, Inc.
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This file is part of Guile.
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Guile is free software: you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Guile is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with Guile. If not, see
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<https://www.gnu.org/licenses/>. */
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#include "libguile/gc.h"
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#include "libguile/ports.h"
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/* struct allocated for each buffered FPORT. */
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typedef struct scm_t_fport {
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/* The file descriptor. */
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int fdes;
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/* Revealed count; 0 indicates not revealed, > 1 revealed. */
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unsigned int revealed;
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/* Set of scm_fport_option flags. */
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unsigned options;
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} scm_t_fport;
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SCM_API scm_t_port_type *scm_file_port_type;
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#define SCM_FSTREAM(x) ((scm_t_fport *) SCM_STREAM (x))
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#define SCM_FPORT_FDES(x) (SCM_FSTREAM (x)->fdes)
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#define SCM_FPORTP(x) \
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(SCM_PORTP (x) && SCM_PORT_TYPE (x) == scm_file_port_type)
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#define SCM_OPFPORTP(x) (SCM_FPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_OPN))
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#define SCM_OPINFPORTP(x) (SCM_OPFPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_RDNG))
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#define SCM_OPOUTFPORTP(x) (SCM_OPFPORTP (x) && (SCM_CELL_WORD_0 (x) & SCM_WRTNG))
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#define SCM_VALIDATE_FPORT(pos, port) \
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SCM_MAKE_VALIDATE_MSG (pos, port, FPORTP, "file port")
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#define SCM_VALIDATE_OPFPORT(pos, port) \
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SCM_MAKE_VALIDATE_MSG (pos, port, OPFPORTP, "open file port")
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SCM_API void scm_evict_ports (int fd);
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SCM_INTERNAL int scm_i_mode_to_open_flags (SCM mode, int *is_binary,
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const char *FUNC_NAME);
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SCM_API SCM scm_open_file_with_encoding (SCM filename, SCM modes,
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SCM guess_encoding, SCM encoding);
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SCM_API SCM scm_open_file (SCM filename, SCM modes);
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SCM_API SCM scm_fdes_to_port (int fdes, char *mode, SCM name);
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SCM_API SCM scm_file_port_p (SCM obj);
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/* Revealed counts. */
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SCM_API int scm_revealed_count (SCM port);
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SCM_API SCM scm_port_revealed (SCM port);
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SCM_API SCM scm_set_port_revealed_x (SCM port, SCM rcount);
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SCM_API SCM scm_adjust_port_revealed_x (SCM port, SCM addend);
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SCM_INTERNAL void scm_init_fports_keywords (void);
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SCM_INTERNAL void scm_init_fports (void);
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/* internal functions */
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#ifdef BUILDING_LIBGUILE
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enum scm_fport_option
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{
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/* FD's that aren't created by Guile probably need to be checked for
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validity. We also check that the open mode is valid. */
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SCM_FPORT_OPTION_VERIFY = 1U<<0,
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/* We know some ports aren't seekable and can elide a syscall in
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that case. */
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SCM_FPORT_OPTION_NOT_SEEKABLE = 1U<<1
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};
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SCM_INTERNAL int scm_i_fdes_is_valid (int fdes, long mode_bits);
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SCM_INTERNAL SCM scm_i_fdes_to_port (int fdes, long mode_bits, SCM name,
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unsigned options);
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#endif /* BUILDING_LIBGUILE */
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#endif /* SCM_FPORTS_H */
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