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/*
*
* Copyright (c) 2009, 2010, 2011, 2022
* 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
#ifndef ZSTD_SUPPORT
static struct compressor zstd_comp_ops = {
ZSTD_COMPRESSION, "zstd"
};
#else
extern struct compressor zstd_comp_ops;
#endif
static struct compressor unknown_comp_ops = {
0, "unknown"
};
struct compressor *compressor[] = {
&gzip_comp_ops,
&lzo_comp_ops,
&lz4_comp_ops,
&xz_comp_ops,
&zstd_comp_ops,
&lzma_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(FILE *stream, char *indent, char *def_comp)
{
int i;
for(i = 0; compressor[i]->id; i++)
if(compressor[i]->supported)
fprintf(stream, "%s\t%s%s\n", indent,
compressor[i]->name,
strcmp(compressor[i]->name, def_comp) == 0 ?
" (default)" : "");
}
void display_compressor_usage(FILE *stream, 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(stream, "\t%s%s\n",
compressor[i]->name, str);
compressor[i]->usage(stream);
} else
fprintf(stream, "\t%s (no options)%s\n",
compressor[i]->name, str);
}
}
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