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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* istream_compressor.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "../internal.h"
static const char *comp_get_filename(istream_t *strm)
{
istream_comp_t *comp = (istream_comp_t *)strm;
return comp->wrapped->get_filename(comp->wrapped);
}
static void comp_destroy(sqfs_object_t *obj)
{
istream_comp_t *comp = (istream_comp_t *)obj;
comp->cleanup(comp);
sqfs_destroy(comp->wrapped);
free(comp);
}
istream_t *istream_compressor_create(istream_t *strm, int comp_id)
{
istream_comp_t *comp = NULL;
sqfs_object_t *obj;
istream_t *base;
switch (comp_id) {
case FSTREAM_COMPRESSOR_GZIP:
#ifdef WITH_GZIP
comp = istream_gzip_create(strm->get_filename(strm));
#endif
break;
case FSTREAM_COMPRESSOR_XZ:
#ifdef WITH_XZ
comp = istream_xz_create(strm->get_filename(strm));
#endif
break;
case FSTREAM_COMPRESSOR_ZSTD:
#if defined(WITH_ZSTD) && defined(HAVE_ZSTD_STREAM)
comp = istream_zstd_create(strm->get_filename(strm));
#endif
break;
case FSTREAM_COMPRESSOR_BZIP2:
#ifdef WITH_BZIP2
comp = istream_bzip2_create(strm->get_filename(strm));
#endif
break;
default:
break;
}
if (comp == NULL)
return NULL;
comp->wrapped = strm;
base = (istream_t *)comp;
base->get_filename = comp_get_filename;
base->buffer = comp->uncompressed;
base->eof = false;
obj = (sqfs_object_t *)comp;
obj->destroy = comp_destroy;
return base;
}
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