Contributors: 12
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| H. Peter Anvin |
205 |
63.27% |
2 |
15.38% |
| Albin Tonnerre |
24 |
7.41% |
1 |
7.69% |
| Kyungsik Lee |
24 |
7.41% |
1 |
7.69% |
| Lasse Collin |
24 |
7.41% |
1 |
7.69% |
| Daniel M. Weeks |
18 |
5.56% |
1 |
7.69% |
| Aneesh Kumar K.V |
11 |
3.40% |
1 |
7.69% |
| Hein Tibosch |
10 |
3.09% |
1 |
7.69% |
| Haesung Kim |
4 |
1.23% |
1 |
7.69% |
| Greg Kroah-Hartman |
1 |
0.31% |
1 |
7.69% |
| Alain Knaff |
1 |
0.31% |
1 |
7.69% |
| Yinghai Lu |
1 |
0.31% |
1 |
7.69% |
| Andi Kleen |
1 |
0.31% |
1 |
7.69% |
| Total |
324 |
|
13 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* decompress.c
*
* Detect the decompression method based on magic number
*/
#include <linux/decompress/generic.h>
#include <linux/decompress/bunzip2.h>
#include <linux/decompress/unlzma.h>
#include <linux/decompress/unxz.h>
#include <linux/decompress/inflate.h>
#include <linux/decompress/unlzo.h>
#include <linux/decompress/unlz4.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/printk.h>
#ifndef CONFIG_DECOMPRESS_GZIP
# define gunzip NULL
#endif
#ifndef CONFIG_DECOMPRESS_BZIP2
# define bunzip2 NULL
#endif
#ifndef CONFIG_DECOMPRESS_LZMA
# define unlzma NULL
#endif
#ifndef CONFIG_DECOMPRESS_XZ
# define unxz NULL
#endif
#ifndef CONFIG_DECOMPRESS_LZO
# define unlzo NULL
#endif
#ifndef CONFIG_DECOMPRESS_LZ4
# define unlz4 NULL
#endif
struct compress_format {
unsigned char magic[2];
const char *name;
decompress_fn decompressor;
};
static const struct compress_format compressed_formats[] __initconst = {
{ {0x1f, 0x8b}, "gzip", gunzip },
{ {0x1f, 0x9e}, "gzip", gunzip },
{ {0x42, 0x5a}, "bzip2", bunzip2 },
{ {0x5d, 0x00}, "lzma", unlzma },
{ {0xfd, 0x37}, "xz", unxz },
{ {0x89, 0x4c}, "lzo", unlzo },
{ {0x02, 0x21}, "lz4", unlz4 },
{ {0, 0}, NULL, NULL }
};
decompress_fn __init decompress_method(const unsigned char *inbuf, long len,
const char **name)
{
const struct compress_format *cf;
if (len < 2) {
if (name)
*name = NULL;
return NULL; /* Need at least this much... */
}
pr_debug("Compressed data magic: %#.2x %#.2x\n", inbuf[0], inbuf[1]);
for (cf = compressed_formats; cf->name; cf++) {
if (!memcmp(inbuf, cf->magic, 2))
break;
}
if (name)
*name = cf->name;
return cf->decompressor;
}