From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55718) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fnyij-0000nZ-Rm for qemu-devel@nongnu.org; Fri, 10 Aug 2018 00:08:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fnyii-0002bA-Sy for qemu-devel@nongnu.org; Fri, 10 Aug 2018 00:08:13 -0400 From: Julio Faracco Date: Fri, 10 Aug 2018 01:07:40 -0300 Message-Id: <20180810040743.25424-2-jcfaracco@gmail.com> In-Reply-To: <20180810040743.25424-1-jcfaracco@gmail.com> References: <20180810040743.25424-1-jcfaracco@gmail.com> Subject: [Qemu-devel] [PATCH 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 | 54 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 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..d09b544a0a --- /dev/null +++ b/block/dmg-lzfse.c @@ -0,0 +1,54 @@ +/* + * 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) +{ + void *aux; + size_t aux_allocated; + size_t out_size; + + aux_allocated = lzfse_decode_scratch_size(); + aux = g_malloc(aux_allocated); + + if (aux_allocated != 0 && aux == 0) { + return -1; + } + + out_size = lzfse_decode_buffer((uint8_t *) next_out, avail_out, + (uint8_t *) next_in, avail_in, aux); + + return out_size; +} + +__attribute__((constructor)) +static void dmg_lzfse_init(void) +{ + assert(!dmg_uncompress_lzfse); + dmg_uncompress_lzfse = dmg_uncompress_lzfse_do; +} -- 2.17.1