mirror of https://github.com/ventoy/Ventoy.git
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
#ifndef COMPRESSOR_H
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#define COMPRESSOR_H
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/*
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*
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* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2,
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* or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* compressor.h
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*/
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struct compressor {
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int id;
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char *name;
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int supported;
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int (*init)(void **, int, int);
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int (*compress)(void *, void *, void *, int, int, int *);
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int (*uncompress)(void *, void *, int, int, int *);
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int (*options)(char **, int);
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int (*options_post)(int);
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void *(*dump_options)(int, int *);
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int (*extract_options)(int, void *, int);
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int (*check_options)(int, void *, int);
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void (*display_options)(void *, int);
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void (*usage)();
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};
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extern struct compressor *lookup_compressor(char *);
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extern struct compressor *lookup_compressor_id(int);
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extern void display_compressors(char *, char *);
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extern void display_compressor_usage(char *);
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static inline int compressor_init(struct compressor *comp, void **stream,
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int block_size, int datablock)
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{
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if(comp->init == NULL)
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return 0;
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return comp->init(stream, block_size, datablock);
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}
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static inline int compressor_compress(struct compressor *comp, void *strm,
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void *dest, void *src, int size, int block_size, int *error)
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{
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return comp->compress(strm, dest, src, size, block_size, error);
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}
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static inline int compressor_uncompress(struct compressor *comp, void *dest,
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void *src, int size, int block_size, int *error)
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{
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return comp->uncompress(dest, src, size, block_size, error);
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}
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/*
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* For the following functions please see the lzo, lz4 or xz
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* compressors for commented examples of how they are used.
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*/
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static inline int compressor_options(struct compressor *comp, char *argv[],
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int argc)
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{
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if(comp->options == NULL)
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return -1;
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return comp->options(argv, argc);
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}
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static inline int compressor_options_post(struct compressor *comp, int block_size)
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{
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if(comp->options_post == NULL)
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return 0;
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return comp->options_post(block_size);
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}
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static inline void *compressor_dump_options(struct compressor *comp,
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int block_size, int *size)
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{
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if(comp->dump_options == NULL)
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return NULL;
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return comp->dump_options(block_size, size);
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}
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static inline int compressor_extract_options(struct compressor *comp,
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int block_size, void *buffer, int size)
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{
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if(comp->extract_options == NULL)
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return size ? -1 : 0;
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return comp->extract_options(block_size, buffer, size);
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}
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static inline int compressor_check_options(struct compressor *comp,
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int block_size, void *buffer, int size)
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{
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if(comp->check_options == NULL)
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return 0;
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return comp->check_options(block_size, buffer, size);
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}
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static inline void compressor_display_options(struct compressor *comp,
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void *buffer, int size)
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{
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if(comp->display_options != NULL)
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comp->display_options(buffer, size);
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}
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#endif
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