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/*
* ports-internal.h - internal-only declarations for ports.
*
* Copyright (C) 2013, 2014 Free Software Foundation, Inc.
*
* This library 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.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef SCM_PORTS_INTERNAL
#define SCM_PORTS_INTERNAL
#include "libguile/_scm.h"
#include "libguile/ports.h"
enum scm_port_encoding_mode {
SCM_PORT_ENCODING_MODE_UTF8,
SCM_PORT_ENCODING_MODE_ICONV
};
typedef enum scm_port_encoding_mode scm_t_port_encoding_mode;
/* This is a separate object so that only those ports that use iconv
cause finalizers to be registered (FIXME: although currently in 2.0
finalizers are always registered for ports anyway). */
struct scm_iconv_descriptors
{
/* input/output iconv conversion descriptors */
void *input_cd;
void *output_cd;
};
typedef struct scm_iconv_descriptors scm_t_iconv_descriptors;
struct scm_port_internal
{
unsigned at_stream_start_for_bom_read : 1;
unsigned at_stream_start_for_bom_write : 1;
scm_t_port_encoding_mode encoding_mode;
scm_t_iconv_descriptors *iconv_descriptors;
unsigned char pending_eof: 1;
/* When non-NULL, this is the method called by 'setvbuf' for this port.
It must create read and write buffers for PORT with the specified
sizes (a size of 0 is for unbuffered ports, which should use the
'shortbuf' field.) Size -1 means to use the port's preferred buffer
size. */
/* XXX: In 2.2 make this a property of the 'scm_t_ptob_descriptor'. */
void (*setvbuf) (SCM port, long read_size, long write_size);
/* Key-value properties. */
SCM alist;
};
typedef struct scm_port_internal scm_t_port_internal;
#define SCM_UNICODE_BOM 0xFEFFUL /* Unicode byte-order mark */
#define SCM_PORT_GET_INTERNAL(x) \
((scm_t_port_internal *) (SCM_PTAB_ENTRY(x)->input_cd))
SCM_INTERNAL scm_t_iconv_descriptors *
scm_i_port_iconv_descriptors (SCM port, scm_t_port_rw_active mode);
#endif
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