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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Copyright (C) 2000 Ximian, Inc.
*
* Authors: Dan Winship <danw@ximian.com>
* Jeffrey Stedfast <fejj@ximian.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, 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;
register const char *inptr;
const char *inend;
gboolean do_dots;
char *outptr;
do_dots = crlf->mode == CAMEL_MIME_FILTER_CRLF_MODE_CRLF_DOTS;
inptr = in;
inend = in + len;
if (crlf->direction == CAMEL_MIME_FILTER_CRLF_ENCODE) {
camel_mime_filter_set_size (f, 3 * len, FALSE);
outptr = f->outbuf;
while (inptr < inend) {
if (*inptr == '\r') {
crlf->saw_cr = TRUE;
} else if (*inptr == '\n') {
crlf->saw_lf = TRUE;
if (!crlf->saw_cr)
*outptr++ = '\r';
crlf->saw_cr = FALSE;
} else {
if (do_dots && *inptr == '.' && crlf->saw_lf)
*outptr++ = '.';
crlf->saw_cr = FALSE;
crlf->saw_lf = FALSE;
}
*outptr++ = *inptr++;
}
} else {
camel_mime_filter_set_size (f, len, FALSE);
outptr = f->outbuf;
while (inptr < inend) {
if (*inptr == '\r') {
crlf->saw_cr = TRUE;
} else {
if (crlf->saw_cr) {
crlf->saw_cr = FALSE;
if (*inptr == '\n') {
crlf->saw_lf = TRUE;
*outptr++ = *inptr++;
continue;
} else
*outptr++ = '\r';
}
*outptr++ = *inptr;
}
if (do_dots && *inptr == '.') {
if (crlf->saw_lf) {
crlf->saw_dot = TRUE;
crlf->saw_lf = FALSE;
inptr++;
} else if (crlf->saw_dot) {
crlf->saw_dot = FALSE;
}
}
crlf->saw_lf = FALSE;
inptr++;
}
}
*out = f->outbuf;
*outlen = outptr - 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;
crlf->saw_lf = TRUE;
crlf->saw_dot = 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;
crlf->saw_lf = TRUE;
crlf->saw_dot = FALSE;
return (CamelMimeFilter *)crlf;
}
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