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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2001, 2004-2005, 2007, 2009-2012 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, see
<http://www.gnu.org/licenses/>. */
/* Notes:
First draft: Alain Magloire.
Complete rewrite: Sergey Poznyakoff.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <mailutils/filter.h>
#include <mailutils/monitor.h>
#include <mailutils/list.h>
#include <mailutils/stream.h>
#include <mailutils/errno.h>
#include <mailutils/cstr.h>
/* NOTE: We will leak here since the monitor of the filter will never
be release. That's ok we can leave with this, it's only done once. */
static mu_list_t filter_list;
struct mu_monitor filter_monitor = MU_MONITOR_INITIALIZER;
static int
filter_name_cmp (const void *item, const void *data)
{
struct _mu_filter_record const *rec = item;
char const *name = data;
return mu_c_strcasecmp (rec->name, name);
}
int
mu_filter_get_list (mu_list_t *plist)
{
if (plist == NULL)
return MU_ERR_OUT_PTR_NULL;
mu_monitor_wrlock (&filter_monitor);
if (filter_list == NULL)
{
int status = mu_list_create (&filter_list);
if (status != 0)
return status;
mu_list_set_comparator (filter_list, filter_name_cmp);
/* Default filters. */
mu_list_append (filter_list, mu_base64_filter);
mu_list_append (filter_list, mu_qp_filter);
mu_list_append (filter_list, mu_binary_filter);
mu_list_append (filter_list, mu_bit8_filter);
mu_list_append (filter_list, mu_bit7_filter);
mu_list_append (filter_list, mu_rfc822_filter);
mu_list_append (filter_list, mu_crlf_filter);
mu_list_append (filter_list, mu_crlfdot_filter);
mu_list_append (filter_list, mu_dot_filter);
mu_list_append (filter_list, mu_rfc_2047_Q_filter);
mu_list_append (filter_list, mu_rfc_2047_B_filter);
mu_list_append (filter_list, mu_from_filter);
mu_list_append (filter_list, mu_inline_comment_filter);
mu_list_append (filter_list, mu_header_filter);
mu_list_append (filter_list, mu_linecon_filter);
mu_list_append (filter_list, mu_linelen_filter);
mu_list_append (filter_list, mu_iconv_filter);
mu_list_append (filter_list, mu_c_escape_filter);
/* FIXME: add the default encodings? */
}
*plist = filter_list;
mu_monitor_unlock (&filter_monitor);
return 0;
}
int
mu_filter_create_args (mu_stream_t *pstream, mu_stream_t stream,
const char *name, int argc, const char **argv,
int mode, int flags)
{
int status;
mu_filter_record_t frec;
mu_list_t list;
void *xdata = NULL;
mu_filter_xcode_t xcode;
if ((flags & MU_STREAM_RDWR) == MU_STREAM_RDWR)
return EINVAL;
mu_filter_get_list (&list);
status = mu_list_locate (list, (void*)name, (void**)&frec);
if (status)
return status;
xcode = mode == MU_FILTER_ENCODE ? frec->encoder : frec->decoder;
if (!xcode)
return MU_ERR_EMPTY_VFN;
if (frec->newdata)
{
status = frec->newdata (&xdata, mode, argc, argv);
if (status)
return status;
}
status = mu_filter_stream_create (pstream, stream,
mode, xcode, xdata,
flags);
if (status)
free (xdata);
return status;
}
int
mu_filter_create (mu_stream_t *pstream, mu_stream_t stream, const char *name,
int mode, int flags)
{
const char *argv[2];
argv[0] = name;
argv[1] = NULL;
return mu_filter_create_args (pstream, stream, name, 1, argv, mode,
flags);
}
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