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