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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999-2025 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/>. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <mailutils/stream.h>
#include <mailutils/filter.h>
#include <mailutils/cstr.h>
#include <mailutils/kwd.h>
enum mu_iconv_fallback_mode mu_default_fallback_mode = mu_fallback_copy_octal;
static struct mu_kwd mode_tab[] = {
{ "none", mu_fallback_none },
{ "copy-pass", mu_fallback_copy_pass },
{ "copy-octal", mu_fallback_copy_octal },
{ NULL }
};
int
mu_set_default_fallback (const char *str)
{
int n;
if (mu_kwd_xlat_name (mode_tab, str, &n))
return EINVAL;
mu_default_fallback_mode = n;
return 0;
}
char const *
mu_iconv_fallback_name (enum mu_iconv_fallback_mode mode)
{
char const *res;
if (mu_kwd_xlat_tok (mode_tab, (int) mode, &res))
return NULL;
return res;
}
int
mu_decode_filter_args (mu_stream_t *pfilter, mu_stream_t input,
const char *filter_name, int argc, const char **argv,
const char *fromcode, const char *tocode)
{
int xargc, i;
char **xargv;
int rc;
xargc = argc + 5;
xargv = calloc (xargc + 1, sizeof (xargv[0]));
if (!xargv)
return ENOMEM;
i = 0;
if (filter_name)
xargv[i++] = (char*) filter_name;
for (; i < argc; i++)
xargv[i] = (char*) argv[i];
if (i)
xargv[i++] = "+";
xargv[i++] = "ICONV";
xargv[i++] = (char*) fromcode;
xargv[i++] = (char*) tocode;
xargv[i] = NULL;
rc = mu_filter_chain_create (pfilter, input,
MU_FILTER_DECODE, MU_STREAM_READ,
i, xargv);
free (xargv);
return rc;
}
int
mu_decode_filter (mu_stream_t *pfilter, mu_stream_t input,
const char *filter_name,
const char *fromcode, const char *tocode)
{
return mu_decode_filter_args (pfilter, input, filter_name, 0, NULL,
fromcode, tocode);
}
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