binflt.c
2.48 KB
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/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2009-2012, 2014-2016 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, 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 GNU Mailutils. If not, see <http://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <mailutils/errno.h>
#include <mailutils/filter.h>
static enum mu_filter_result
_copy_codec (void *xd MU_ARG_UNUSED,
enum mu_filter_command cmd,
struct mu_filter_io *iobuf)
{
size_t osize;
switch (cmd)
{
case mu_filter_init:
case mu_filter_done:
return mu_filter_ok;
default:
break;
}
osize = iobuf->osize;
if (osize > iobuf->isize)
osize = iobuf->isize;
memcpy (iobuf->output, iobuf->input, osize);
iobuf->isize = osize;
iobuf->osize = osize;
return mu_filter_ok;
}
static enum mu_filter_result
_bit7_coder (void *xd MU_ARG_UNUSED,
enum mu_filter_command cmd,
struct mu_filter_io *iobuf)
{
size_t i;
const unsigned char *iptr;
size_t isize;
char *optr;
size_t osize;
switch (cmd)
{
case mu_filter_init:
case mu_filter_done:
return mu_filter_ok;
default:
break;
}
iptr = (const unsigned char *) iobuf->input;
isize = iobuf->isize;
optr = iobuf->output;
osize = iobuf->osize;
if (osize > isize)
osize = isize;
for (i = 0; i < osize; i++)
*optr++ = *iptr++ & 0x7f;
iobuf->isize = osize;
iobuf->osize = osize;
return mu_filter_ok;
}
static struct _mu_filter_record _binary_filter = {
"binary",
NULL,
_copy_codec,
_copy_codec
};
mu_filter_record_t mu_binary_filter = &_binary_filter;
static struct _mu_filter_record _bit8_filter = {
"8bit",
NULL,
_copy_codec,
_copy_codec
};
mu_filter_record_t mu_bit8_filter = &_bit8_filter;
static struct _mu_filter_record _bit7_filter = {
"7bit",
NULL,
_bit7_coder,
_copy_codec
};
mu_filter_record_t mu_bit7_filter = &_bit7_filter;