From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37965) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fqInj-0006AQ-QH for qemu-devel@nongnu.org; Thu, 16 Aug 2018 09:59:00 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fqIng-0000E0-5q for qemu-devel@nongnu.org; Thu, 16 Aug 2018 09:58:58 -0400 From: Julio Faracco Date: Thu, 16 Aug 2018 10:58:34 -0300 Message-Id: <20180816135837.13149-2-jcfaracco@gmail.com> In-Reply-To: <20180816135837.13149-1-jcfaracco@gmail.com> References: <20180816135837.13149-1-jcfaracco@gmail.com> Subject: [Qemu-devel] [PATCH v2 1/4] block: adding lzfse decompressing support as a module. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: stefanha@redhat.com, kwolf@redhat.com, mreitz@redhat.com, qemu-block@nongnu.org QEMU dmg support includes zlib and bzip2, but it does not contains lzfse support. This commit adds the source file to extend compression support for new DMGs. Signed-off-by: Julio Faracco --- block/dmg-lzfse.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 block/dmg-lzfse.c diff --git a/block/dmg-lzfse.c b/block/dmg-lzfse.c new file mode 100644 index 0000000000..19d25bc646 --- /dev/null +++ b/block/dmg-lzfse.c @@ -0,0 +1,49 @@ +/* + * DMG lzfse uncompression + * + * Copyright (c) 2018 Julio Cesar Faracco + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "qemu/osdep.h" +#include "qemu-common.h" +#include "dmg.h" +#include + +static int dmg_uncompress_lzfse_do(char *next_in, unsigned int avail_in, + char *next_out, unsigned int avail_out) +{ + size_t out_size = lzfse_decode_buffer((uint8_t *) next_out, avail_out, + (uint8_t *) next_in, avail_in, + NULL); + + /* We need to decode the single chunk only. */ + /* So, out_size == avail_out is not an error here. */ + if (out_size > 0) { + return out_size; + } + return -1; +} + +__attribute__((constructor)) +static void dmg_lzfse_init(void) +{ + assert(!dmg_uncompress_lzfse); + dmg_uncompress_lzfse = dmg_uncompress_lzfse_do; +} -- 2.17.1