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/*
* Copyright (C) 2000 Helix Code Inc.
*
* Authors: Michael Zucchi <notzed@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-basic.h"
#include "camel-mime-utils.h"
static void reset(CamelMimeFilter *mf);
static void complete(CamelMimeFilter *mf, char *in, size_t len,
size_t prespace, char **out,
size_t *outlen, size_t *outprespace);
static void filter(CamelMimeFilter *mf, char *in, size_t len,
size_t prespace, char **out,
size_t *outlen, size_t *outprespace);
static void camel_mime_filter_basic_class_init (CamelMimeFilterBasicClass *klass);
static void camel_mime_filter_basic_init (CamelMimeFilterBasic *obj);
static CamelMimeFilterClass *camel_mime_filter_basic_parent;
static void
camel_mime_filter_basic_class_init (CamelMimeFilterBasicClass *klass)
{
CamelMimeFilterClass *filter_class = (CamelMimeFilterClass *) klass;
camel_mime_filter_basic_parent = CAMEL_MIME_FILTER_CLASS(camel_type_get_global_classfuncs (camel_mime_filter_get_type ()));
filter_class->reset = reset;
filter_class->filter = filter;
filter_class->complete = complete;
}
static void
camel_mime_filter_basic_init (CamelMimeFilterBasic *obj)
{
obj->state = 0;
obj->save = 0;
}
CamelType
camel_mime_filter_basic_get_type (void)
{
static CamelType type = CAMEL_INVALID_TYPE;
if (type == CAMEL_INVALID_TYPE) {
type = camel_type_register (camel_mime_filter_get_type (), "CamelMimeFilterBasic",
sizeof (CamelMimeFilterBasic),
sizeof (CamelMimeFilterBasicClass),
(CamelObjectClassInitFunc) camel_mime_filter_basic_class_init,
NULL,
(CamelObjectInitFunc) camel_mime_filter_basic_init,
NULL);
}
return type;
}
/* should this 'flush' outstanding state/data bytes? */
static void
reset(CamelMimeFilter *mf)
{
CamelMimeFilterBasic *f = (CamelMimeFilterBasic *)mf;
switch(f->type) {
case CAMEL_MIME_FILTER_BASIC_QP_ENC:
f->state = -1;
break;
default:
f->state = 0;
}
f->save = 0;
}
static void
complete(CamelMimeFilter *mf, char *in, size_t len, size_t prespace, char **out, size_t *outlen, size_t *outprespace)
{
CamelMimeFilterBasic *f = (CamelMimeFilterBasic *)mf;
int newlen;
switch(f->type) {
case CAMEL_MIME_FILTER_BASIC_BASE64_ENC:
/* wont go to more than 2x size (overly conservative) */
camel_mime_filter_set_size(mf, len*2+6, FALSE);
newlen = base64_encode_close(in, len, TRUE, mf->outbuf, &f->state, &f->save);
g_assert(newlen <= len*2+6);
break;
case CAMEL_MIME_FILTER_BASIC_QP_ENC:
/* *4 is definetly more than needed ... */
camel_mime_filter_set_size(mf, len*4+4, FALSE);
newlen = quoted_encode_close(in, len, mf->outbuf, &f->state, &f->save);
g_assert(newlen <= len*4+4);
break;
case CAMEL_MIME_FILTER_BASIC_BASE64_DEC:
/* output can't possibly exceed the input size */
camel_mime_filter_set_size(mf, len, FALSE);
newlen = base64_decode_step(in, len, mf->outbuf, &f->state, &f->save);
g_assert(newlen <= len);
break;
case CAMEL_MIME_FILTER_BASIC_QP_DEC:
/* output can't possibly exceed the input size */
camel_mime_filter_set_size(mf, len, FALSE);
newlen = quoted_decode_step(in, len, mf->outbuf, &f->state, &f->save);
g_assert(newlen <= len);
break;
default:
g_warning("unknown type %d in CamelMimeFilterBasic", f->type);
goto donothing;
}
*out = mf->outbuf;
*outlen = newlen;
*outprespace = mf->outpre;
return;
donothing:
*out = in;
*outlen = len;
*outprespace = prespace;
}
/* here we do all of the basic mime filtering */
static void
filter(CamelMimeFilter *mf, char *in, size_t len, size_t prespace, char **out, size_t *outlen, size_t *outprespace)
{
CamelMimeFilterBasic *f = (CamelMimeFilterBasic *)mf;
int newlen;
switch(f->type) {
case CAMEL_MIME_FILTER_BASIC_BASE64_ENC:
/* wont go to more than 2x size (overly conservative) */
camel_mime_filter_set_size(mf, len*2+6, FALSE);
newlen = base64_encode_step(in, len, TRUE, mf->outbuf, &f->state, &f->save);
g_assert(newlen <= len*2+6);
break;
case CAMEL_MIME_FILTER_BASIC_QP_ENC:
/* *4 is overly conservative, but will do */
camel_mime_filter_set_size(mf, len*4+4, FALSE);
newlen = quoted_encode_step(in, len, mf->outbuf, &f->state, &f->save);
g_assert(newlen <= len*4+4);
break;
case CAMEL_MIME_FILTER_BASIC_BASE64_DEC:
/* output can't possibly exceed the input size */
camel_mime_filter_set_size(mf, len, FALSE);
newlen = base64_decode_step(in, len, mf->outbuf, &f->state, &f->save);
g_assert(newlen <= len);
break;
case CAMEL_MIME_FILTER_BASIC_QP_DEC:
/* output can't possibly exceed the input size */
camel_mime_filter_set_size(mf, len, FALSE);
newlen = quoted_decode_step(in, len, mf->outbuf, &f->state, &f->save);
g_assert(newlen <= len);
break;
default:
g_warning("unknown type %d in CamelMimeFilterBasic", f->type);
goto donothing;
}
*out = mf->outbuf;
*outlen = newlen;
*outprespace = mf->outpre;
return;
donothing:
*out = in;
*outlen = len;
*outprespace = prespace;
}
/**
* camel_mime_filter_basic_new:
*
* Create a new CamelMimeFilterBasic object.
*
* Return value: A new CamelMimeFilterBasic widget.
**/
CamelMimeFilterBasic *
camel_mime_filter_basic_new (void)
{
CamelMimeFilterBasic *new = CAMEL_MIME_FILTER_BASIC ( camel_object_new (camel_mime_filter_basic_get_type ()));
return new;
}
CamelMimeFilterBasic *
camel_mime_filter_basic_new_type(CamelMimeFilterBasicType type)
{
CamelMimeFilterBasic *new;
switch (type) {
case CAMEL_MIME_FILTER_BASIC_BASE64_ENC:
case CAMEL_MIME_FILTER_BASIC_QP_ENC:
case CAMEL_MIME_FILTER_BASIC_BASE64_DEC:
case CAMEL_MIME_FILTER_BASIC_QP_DEC:
new = camel_mime_filter_basic_new();
new->type = type;
break;
default:
g_warning("Invalid type of CamelMimeFilterBasic requested: %d", type);
new = NULL;
break;
}
camel_mime_filter_reset((CamelMimeFilter *)new);
return new;
}
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