716f3f612e
function old new delta check_sizes - 16 +16 crc32_table - 4 +4 index_update 47 40 -7 crc32_validate 110 93 -17 dec_vli 197 165 -32 unpack_xz_stream 4284 4014 -270 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 0/4 up/down: 20/-326) Total: -306 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
/*
|
|
* This file uses XZ Embedded library code which is written
|
|
* by Lasse Collin <lasse.collin@tukaani.org>
|
|
* and Igor Pavlov <http://7-zip.org/>
|
|
*
|
|
* See README file in unxz/ directory for more information.
|
|
*
|
|
* This file is:
|
|
* Copyright (C) 2010 Denys Vlasenko <vda.linux@googlemail.com>
|
|
* Licensed under GPLv2, see file LICENSE in this tarball for details.
|
|
*/
|
|
#include "libbb.h"
|
|
#include "unarchive.h"
|
|
|
|
#define XZ_REALLOC_DICT_BUF(ptr, size) xrealloc(ptr, size)
|
|
#define XZ_FUNC FAST_FUNC
|
|
#define XZ_EXTERN static
|
|
|
|
/* Skip check (rather than fail) of unsupported hash functions */
|
|
#define XZ_DEC_ANY_CHECK 1
|
|
|
|
/* We use our own crc32 function */
|
|
#define XZ_INTERNAL_CRC32 0
|
|
static uint32_t *crc32_table;
|
|
static uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc)
|
|
{
|
|
crc = ~crc;
|
|
|
|
while (size != 0) {
|
|
crc = crc32_table[*buf++ ^ (crc & 0xFF)] ^ (crc >> 8);
|
|
--size;
|
|
}
|
|
|
|
return ~crc;
|
|
}
|
|
|
|
/* We use arch-optimized unaligned accessors */
|
|
#define get_unaligned_le32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_LE32(v); })
|
|
#define get_unaligned_be32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_BE32(v); })
|
|
#define put_unaligned_le32(val, buf) move_to_unaligned16(buf, SWAP_LE32(val))
|
|
#define put_unaligned_be32(val, buf) move_to_unaligned16(buf, SWAP_BE32(val))
|
|
|
|
#include "unxz/xz.h"
|
|
#include "unxz/xz_config.h"
|
|
|
|
#include "unxz/xz_dec_bcj.c"
|
|
#include "unxz/xz_dec_lzma2.c"
|
|
#include "unxz/xz_dec_stream.c"
|
|
#include "unxz/xz_lzma2.h"
|
|
#include "unxz/xz_private.h"
|
|
#include "unxz/xz_stream.h"
|
|
|
|
IF_DESKTOP(long long) int FAST_FUNC
|
|
unpack_xz_stream(int src_fd, int dst_fd)
|
|
{
|
|
struct xz_buf iobuf;
|
|
struct xz_dec *state;
|
|
unsigned char *membuf;
|
|
IF_DESKTOP(long long) int total = 0;
|
|
enum {
|
|
IN_SIZE = 4 * 1024,
|
|
OUT_SIZE = 60 * 1024,
|
|
};
|
|
|
|
membuf = xmalloc(IN_SIZE + OUT_SIZE);
|
|
memset(&iobuf, 0, sizeof(iobuf));
|
|
iobuf.in = membuf;
|
|
iobuf.out = membuf + IN_SIZE;
|
|
iobuf.out_size = OUT_SIZE;
|
|
|
|
if (!crc32_table)
|
|
crc32_table = crc32_filltable(NULL, /*endian:*/ 0);
|
|
|
|
state = xz_dec_init(64*1024); /* initial dict of 64k */
|
|
|
|
while (1) {
|
|
enum xz_ret r;
|
|
int insz, rd, outpos;
|
|
|
|
iobuf.in_size -= iobuf.in_pos;
|
|
insz = iobuf.in_size;
|
|
if (insz)
|
|
memmove(membuf, membuf + iobuf.in_pos, insz);
|
|
iobuf.in_pos = 0;
|
|
rd = IN_SIZE - insz;
|
|
if (rd) {
|
|
rd = safe_read(src_fd, membuf + insz, rd);
|
|
if (rd < 0) {
|
|
bb_error_msg("read error");
|
|
total = -1;
|
|
break;
|
|
}
|
|
iobuf.in_size = insz + rd;
|
|
}
|
|
// bb_error_msg(">in pos:%d size:%d out pos:%d size:%d",
|
|
// iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size);
|
|
r = xz_dec_run(state, &iobuf);
|
|
// bb_error_msg("<in pos:%d size:%d out pos:%d size:%d r:%d",
|
|
// iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size, r);
|
|
outpos = iobuf.out_pos;
|
|
if (outpos) {
|
|
xwrite(dst_fd, iobuf.out, outpos);
|
|
IF_DESKTOP(total += outpos;)
|
|
}
|
|
if (r == XZ_STREAM_END
|
|
/* this happens even with well-formed files: */
|
|
|| (r == XZ_BUF_ERROR && insz == 0 && outpos == 0)
|
|
) {
|
|
break;
|
|
}
|
|
if (r != XZ_OK && r != XZ_UNSUPPORTED_CHECK) {
|
|
bb_error_msg("corrupted data");
|
|
total = -1;
|
|
break;
|
|
}
|
|
iobuf.out_pos = 0;
|
|
}
|
|
xz_dec_end(state);
|
|
free(membuf);
|
|
|
|
return total;
|
|
}
|