/*
* Copyright (C) 2000 Helix Code, Inc.
*
* Authors: Dan Winship <danw@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;
}
GtkType
camel_mime_filter_crlf_get_type (void)
{
static GtkType type = 0;
if (!type) {
GtkTypeInfo type_info = {
"CamelMimeFilterCRLF",
sizeof (CamelMimeFilterCRLF),
sizeof (CamelMimeFilterCRLFClass),
(GtkClassInitFunc) camel_mime_filter_crlf_class_init,
(GtkObjectInitFunc) NULL,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
type = gtk_type_unique (camel_mime_filter_get_type (),
&type_info);
}
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;
char *p, *q;
if (crlf->direction == CAMEL_MIME_FILTER_CRLF_ENCODE) {
camel_mime_filter_set_size (f, 2 * len, FALSE);
p = in;
q = f->outbuf;
while (p < in + len) {
if (*p == '\n')
*q++ = '\r';
*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++;
}
}
}
*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)
{
CamelMimeFilterCRLF *crlf = gtk_type_new (CAMEL_MIME_FILTER_CRLF_TYPE);
crlf->direction = direction;
crlf->saw_cr = FALSE;
return (CamelMimeFilter *)crlf;
}