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146 lines
3.0 KiB
C
146 lines
3.0 KiB
C
/*
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*
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* Copyright (c) 2009, 2010, 2011
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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.c
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*/
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#include <stdio.h>
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#include <string.h>
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#include "compressor.h"
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#include "squashfs_fs.h"
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#ifndef GZIP_SUPPORT
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static struct compressor gzip_comp_ops = {
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ZLIB_COMPRESSION, "gzip"
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};
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#else
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extern struct compressor gzip_comp_ops;
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#endif
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#ifndef LZMA_SUPPORT
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static struct compressor lzma_comp_ops = {
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LZMA_COMPRESSION, "lzma"
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};
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#else
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extern struct compressor lzma_comp_ops;
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#endif
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#ifndef LZO_SUPPORT
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static struct compressor lzo_comp_ops = {
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LZO_COMPRESSION, "lzo"
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};
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#else
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extern struct compressor lzo_comp_ops;
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#endif
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#ifndef LZ4_SUPPORT
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static struct compressor lz4_comp_ops = {
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LZ4_COMPRESSION, "lz4"
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};
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#else
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extern struct compressor lz4_comp_ops;
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#endif
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#ifndef XZ_SUPPORT
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static struct compressor xz_comp_ops = {
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XZ_COMPRESSION, "xz"
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};
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#else
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extern struct compressor xz_comp_ops;
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#endif
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#ifndef ZSTD_SUPPORT
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static struct compressor zstd_comp_ops = {
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ZSTD_COMPRESSION, "zstd"
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};
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#else
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extern struct compressor zstd_comp_ops;
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#endif
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static struct compressor unknown_comp_ops = {
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0, "unknown"
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};
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struct compressor *compressor[] = {
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&gzip_comp_ops,
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&lzma_comp_ops,
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&lzo_comp_ops,
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&lz4_comp_ops,
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&xz_comp_ops,
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&zstd_comp_ops,
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&unknown_comp_ops
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};
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struct compressor *lookup_compressor(char *name)
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{
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int i;
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for(i = 0; compressor[i]->id; i++)
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if(strcmp(compressor[i]->name, name) == 0)
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break;
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return compressor[i];
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}
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struct compressor *lookup_compressor_id(int id)
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{
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int i;
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for(i = 0; compressor[i]->id; i++)
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if(id == compressor[i]->id)
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break;
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return compressor[i];
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}
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void display_compressors(char *indent, char *def_comp)
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{
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int i;
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for(i = 0; compressor[i]->id; i++)
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if(compressor[i]->supported)
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fprintf(stderr, "%s\t%s%s\n", indent,
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compressor[i]->name,
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strcmp(compressor[i]->name, def_comp) == 0 ?
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" (default)" : "");
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}
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void display_compressor_usage(char *def_comp)
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{
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int i;
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for(i = 0; compressor[i]->id; i++)
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if(compressor[i]->supported) {
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char *str = strcmp(compressor[i]->name, def_comp) == 0 ?
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" (default)" : "";
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if(compressor[i]->usage) {
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fprintf(stderr, "\t%s%s\n",
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compressor[i]->name, str);
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compressor[i]->usage();
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} else
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fprintf(stderr, "\t%s (no options)%s\n",
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compressor[i]->name, str);
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}
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}
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