diff options
Diffstat (limited to 'squashfs-tools/gzip_wrapper.h')
-rw-r--r-- | squashfs-tools/gzip_wrapper.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/squashfs-tools/gzip_wrapper.h b/squashfs-tools/gzip_wrapper.h new file mode 100644 index 0000000..5f87373 --- /dev/null +++ b/squashfs-tools/gzip_wrapper.h @@ -0,0 +1,69 @@ +#ifndef GZIP_WRAPPER_H +#define GZIP_WRAPPER_H +/* + * Squashfs + * + * Copyright (c) 2014 + * Phillip Lougher <phillip@squashfs.org.uk> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2, + * 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * gzip_wrapper.h + * + */ + +#include "endian_compat.h" + +#if __BYTE_ORDER == __BIG_ENDIAN +extern unsigned int inswap_le16(unsigned short); +extern unsigned int inswap_le32(unsigned int); + +#define SQUASHFS_INSWAP_COMP_OPTS(s) { \ + (s)->compression_level = inswap_le32((s)->compression_level); \ + (s)->window_size = inswap_le16((s)->window_size); \ + (s)->strategy = inswap_le16((s)->strategy); \ +} +#else +#define SQUASHFS_INSWAP_COMP_OPTS(s) +#endif + +/* Default compression */ +#define GZIP_DEFAULT_COMPRESSION_LEVEL 9 +#define GZIP_DEFAULT_WINDOW_SIZE 15 + +struct gzip_comp_opts { + int compression_level; + short window_size; + short strategy; +}; + +struct strategy { + char *name; + int strategy; + int selected; +}; + +struct gzip_strategy { + int strategy; + int length; + void *buffer; +}; + +struct gzip_stream { + z_stream stream; + int strategies; + struct gzip_strategy strategy[0]; +}; +#endif |