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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Authors: Jeffrey Stedfast <fejj@ximian.com>
*
* Copyright 2001-2004 Ximian, Inc. (www.ximian.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include "em-stripsig-filter.h"
static void em_stripsig_filter_class_init (EMStripSigFilterClass *klass);
static void em_stripsig_filter_init (EMStripSigFilter *filter, EMStripSigFilterClass *klass);
static void filter_filter (CamelMimeFilter *filter, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace);
static void filter_complete (CamelMimeFilter *filter, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace);
static void filter_reset (CamelMimeFilter *filter);
static CamelMimeFilterClass *parent_class = NULL;
CamelType
em_stripsig_filter_get_type (void)
{
static CamelType type = CAMEL_INVALID_TYPE;
if (type == CAMEL_INVALID_TYPE) {
type = camel_type_register (camel_mime_filter_get_type (),
"EMStripSigFilter",
sizeof (EMStripSigFilter),
sizeof (EMStripSigFilterClass),
(CamelObjectClassInitFunc) em_stripsig_filter_class_init,
NULL,
(CamelObjectInitFunc) em_stripsig_filter_init,
NULL);
}
return type;
}
static void
em_stripsig_filter_class_init (EMStripSigFilterClass *klass)
{
CamelMimeFilterClass *filter_class = (CamelMimeFilterClass *) klass;
parent_class = CAMEL_MIME_FILTER_CLASS (camel_type_get_global_classfuncs (camel_mime_filter_get_type ()));
filter_class->reset = filter_reset;
filter_class->filter = filter_filter;
filter_class->complete = filter_complete;
}
static void
em_stripsig_filter_init (EMStripSigFilter *filter, EMStripSigFilterClass *klass)
{
filter->midline = FALSE;
}
static void
strip_signature (CamelMimeFilter *filter, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace, int flush)
{
EMStripSigFilter *stripsig = (EMStripSigFilter *) filter;
register const char *inptr = in;
const char *inend = in + len;
const char *start = NULL;
if (stripsig->midline) {
while (inptr < inend && *inptr != '\n')
inptr++;
if (inptr < inend) {
stripsig->midline = FALSE;
inptr++;
}
}
while (inptr < inend) {
if ((inend - inptr) >= 4 && !strncmp (inptr, "-- \n", 4)) {
start = inptr;
inptr += 4;
} else {
while (inptr < inend && *inptr != '\n')
inptr++;
if (inptr == inend) {
stripsig->midline = TRUE;
break;
}
inptr++;
}
}
if (start != NULL)
inptr = start;
if (!flush && inend > inptr)
camel_mime_filter_backup (filter, inptr, inend - inptr);
else if (!start)
inptr = inend;
*out = in;
*outlen = inptr - in;
*outprespace = prespace;
}
static void
filter_filter (CamelMimeFilter *filter, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace)
{
strip_signature (filter, in, len, prespace, out, outlen, outprespace, FALSE);
}
static void
filter_complete (CamelMimeFilter *filter, char *in, size_t len, size_t prespace,
char **out, size_t *outlen, size_t *outprespace)
{
strip_signature (filter, in, len, prespace, out, outlen, outprespace, TRUE);
}
/* should this 'flush' outstanding state/data bytes? */
static void
filter_reset (CamelMimeFilter *filter)
{
EMStripSigFilter *stripsig = (EMStripSigFilter *) filter;
stripsig->midline = FALSE;
}
/**
* em_stripsig_filter_new:
*
* Creates a new stripsig filter.
*
* Returns a new stripsig filter.
**/
CamelMimeFilter *
em_stripsig_filter_new (void)
{
return (CamelMimeFilter *) camel_object_new (EM_TYPE_STRIPSIG_FILTER);
}
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