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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Copyright (C) 2000 Helix Code, Inc.
*
* Authors: Dan Winship <danw@helixcode.com>
* Jeffrey Stedfast <fejj@helixcode.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "camel-mime-filter-crlf.h"
static void filter (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace);
static void complete (CamelMimeFilter *f, char *in, size_t len,
size_t prespace, char **out, size_t *outlen,
size_t *outprespace);
static void reset (CamelMimeFilter *f);
static void
camel_mime_filter_crlf_class_init (CamelMimeFilterCRLFClass *klass)
{
CamelMimeFilterClass *mime_filter_class =
(CamelMimeFilterClass *) klass;
mime_filter_class->filter = filter;
mime_filter_class->complete = complete;
mime_filter_class->reset = reset;
}
CamelType
camel_mime_filter_crlf_get_type (void)
{
static CamelType type = CAMEL_INVALID_TYPE;
if (type == CAMEL_INVALID_TYPE) {
type = camel_type_register (camel_mime_filter_get_type(), "CamelMimeFilterCRLF",
sizeof (CamelMimeFilterCRLF),
sizeof (CamelMimeFilterCRLFClass),
(CamelObjectClassInitFunc) camel_mime_filter_crlf_class_init,
NULL,
NULL,
NULL);
}
return type;
}
static void
filter (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace)
{
CamelMimeFilterCRLF *crlf = (CamelMimeFilterCRLF *)f;
gboolean do_dots;
char *p, *q;
do_dots = crlf->mode == CAMEL_MIME_FILTER_CRLF_MODE_CRLF_DOTS;
if (crlf->direction == CAMEL_MIME_FILTER_CRLF_ENCODE) {
camel_mime_filter_set_size (f, 3 * len, FALSE);
p = in;
q = f->outbuf;
while (p < in + len) {
if (*p == '\n')
*q++ = '\r';
else
if (do_dots && *p == '.' && (p == in || *(p - 1) == '\n'))
*q++ = '.';
*q++ = *p++;
}
} else {
camel_mime_filter_set_size (f, len, FALSE);
p = in;
q = f->outbuf;
while (p < in + len) {
if (*p == '\r') {
crlf->saw_cr = TRUE;
} else {
if (crlf->saw_cr) {
if (*p != '\n')
*q++ = '\r';
crlf->saw_cr = FALSE;
}
*q++ = *p;
}
if (do_dots) {
if (*p == '.' && (p == in || *(p - 1) == '\n')) {
crlf->saw_dot = TRUE;
} else {
if (crlf->saw_dot) {
if (*p == '.')
p++;
crlf->saw_dot = FALSE;
}
*q++ = *p;
}
}
p++;
}
}
*out = f->outbuf;
*outlen = q - f->outbuf;
*outprespace = f->outpre;
}
static void
complete (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace)
{
if (len)
filter (f, in, len, prespace, out, outlen, outprespace);
}
static void
reset (CamelMimeFilter *f)
{
CamelMimeFilterCRLF *crlf = (CamelMimeFilterCRLF *)f;
crlf->saw_cr = FALSE;
}
CamelMimeFilter *
camel_mime_filter_crlf_new (CamelMimeFilterCRLFDirection direction, CamelMimeFilterCRLFMode mode)
{
CamelMimeFilterCRLF *crlf = CAMEL_MIME_FILTER_CRLF(camel_object_new (CAMEL_MIME_FILTER_CRLF_TYPE));
crlf->direction = direction;
crlf->mode = mode;
crlf->saw_cr = FALSE;
return (CamelMimeFilter *)crlf;
}
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