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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* Copyright (C) 2009 Red Hat, Inc.
* Copyright (C) 2009 Shaun McCance <shaunm@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Shaun McCance <shaunm@gnome.org>
*/
#include "config.h"
#include "yelp-lzma-decompressor.h"
#include <errno.h>
#include <string.h>
#include <lzma.h>
#include <glib/gi18n.h>
#include <gio/gio.h>
static void yelp_lzma_decompressor_iface_init (GConverterIface *iface);
struct _YelpLzmaDecompressor
{
GObject parent_instance;
lzma_stream lzmastream;
};
G_DEFINE_TYPE_WITH_CODE (YelpLzmaDecompressor, yelp_lzma_decompressor, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_CONVERTER,
yelp_lzma_decompressor_iface_init))
static void
yelp_lzma_decompressor_finalize (GObject *object)
{
YelpLzmaDecompressor *decompressor;
decompressor = YELP_LZMA_DECOMPRESSOR (object);
lzma_end (&decompressor->lzmastream);
G_OBJECT_CLASS (yelp_lzma_decompressor_parent_class)->finalize (object);
}
static void
yelp_lzma_decompressor_init (YelpLzmaDecompressor *decompressor)
{
}
static void
yelp_lzma_decompressor_constructed (GObject *object)
{
YelpLzmaDecompressor *decompressor;
lzma_stream tmp = LZMA_STREAM_INIT;
lzma_ret res;
decompressor = YELP_LZMA_DECOMPRESSOR (object);
decompressor->lzmastream = tmp;
res = lzma_auto_decoder (&decompressor->lzmastream, SIZE_MAX, 0);
if (res == LZMA_MEM_ERROR)
g_error ("YelpLzmaDecompressor: Not enough memory for lzma use");
if (res == LZMA_OPTIONS_ERROR)
g_error ("YelpLzmaDecompressor: Unsupported flags");
if (res != LZMA_OK)
g_error ("YelpLzmaDecompressor: Unexpected lzma error");
}
static void
yelp_lzma_decompressor_class_init (YelpLzmaDecompressorClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = yelp_lzma_decompressor_finalize;
gobject_class->constructed = yelp_lzma_decompressor_constructed;
}
YelpLzmaDecompressor *
yelp_lzma_decompressor_new (void)
{
YelpLzmaDecompressor *decompressor;
decompressor = g_object_new (YELP_TYPE_LZMA_DECOMPRESSOR, NULL);
return decompressor;
}
static void
yelp_lzma_decompressor_reset (GConverter *converter)
{
YelpLzmaDecompressor *decompressor = YELP_LZMA_DECOMPRESSOR (converter);
lzma_ret res;
/* lzma doesn't have a reset function. Ending and reiniting
* might do the trick. But this is untested. If reset matters
* to you, test this.
*/
lzma_end (&decompressor->lzmastream);
res = lzma_code (&decompressor->lzmastream, LZMA_RUN);
if (res == LZMA_MEM_ERROR )
g_error ("YelpLzmaDecompressor: Not enough memory for lzma use");
if (res != LZMA_OK)
g_error ("YelpLzmaDecompressor: Unexpected lzma error");
}
static GConverterResult
yelp_lzma_decompressor_convert (GConverter *converter,
const void *inbuf,
gsize inbuf_size,
void *outbuf,
gsize outbuf_size,
GConverterFlags flags,
gsize *bytes_read,
gsize *bytes_written,
GError **error)
{
YelpLzmaDecompressor *decompressor;
lzma_ret res;
decompressor = YELP_LZMA_DECOMPRESSOR (converter);
decompressor->lzmastream.next_in = (void *)inbuf;
decompressor->lzmastream.avail_in = inbuf_size;
decompressor->lzmastream.next_out = outbuf;
decompressor->lzmastream.avail_out = outbuf_size;
res = lzma_code (&decompressor->lzmastream, LZMA_RUN);
if (res == LZMA_DATA_ERROR) {
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_INVALID_DATA,
_("Invalid compressed data"));
return G_CONVERTER_ERROR;
}
if (res == LZMA_MEM_ERROR) {
g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_FAILED,
_("Not enough memory"));
return G_CONVERTER_ERROR;
}
if (res == LZMA_OK || res == LZMA_STREAM_END) {
*bytes_read = inbuf_size - decompressor->lzmastream.avail_in;
*bytes_written = outbuf_size - decompressor->lzmastream.avail_out;
if (res == LZMA_STREAM_END)
return G_CONVERTER_FINISHED;
return G_CONVERTER_CONVERTED;
}
g_assert_not_reached ();
}
static void
yelp_lzma_decompressor_iface_init (GConverterIface *iface)
{
iface->convert = yelp_lzma_decompressor_convert;
iface->reset = yelp_lzma_decompressor_reset;
}
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