6948f210ed
function old new delta unpack_xz_stream - 4126 +4126 setup_unzip_on_fd 80 150 +70 open_zipped 113 131 +18 unpack_unxz 5 12 +7 send_tree 360 353 -7 unpack_xz_stream_stdin 3953 - -3953 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 3/1 up/down: 4221/-3960) Total: 261 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/*
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* This file uses XZ Embedded library code which is written
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* by Lasse Collin <lasse.collin@tukaani.org>
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* and Igor Pavlov <http://7-zip.org/>
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*
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* See README file in unxz/ directory for more information.
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*
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* This file is:
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* Copyright (C) 2010 Denys Vlasenko <vda.linux@googlemail.com>
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* Licensed under GPLv2, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include "unarchive.h"
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//#define XZ_DEBUG_MSG(...) bb_error_msg(__VA_ARGS)
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#define XZ_REALLOC_DICT_BUF(ptr, size) xrealloc(ptr, size)
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#define XZ_FUNC FAST_FUNC
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#define XZ_EXTERN static
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#define xz_crc32_init(table) crc32_filltable(table, /*endian:*/ 0)
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static uint32_t xz_crc32(uint32_t *crc32_table,
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const uint8_t *buf, size_t size, uint32_t crc)
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{
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crc = ~crc;
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while (size != 0) {
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crc = crc32_table[*buf++ ^ (crc & 0xFF)] ^ (crc >> 8);
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--size;
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}
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return ~crc;
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}
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#define xz_crc32 xz_crc32
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#define get_unaligned_le32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_LE32(v); })
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#define get_unaligned_be32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_BE32(v); })
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#define put_unaligned_le32(val, buf) move_to_unaligned16(buf, SWAP_LE32(val))
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#define put_unaligned_be32(val, buf) move_to_unaligned16(buf, SWAP_BE32(val))
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#include "unxz/xz.h"
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#include "unxz/xz_config.h"
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#include "unxz/xz_dec_bcj.c"
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#include "unxz/xz_dec_lzma2.c"
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#include "unxz/xz_dec_stream.c"
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#include "unxz/xz_lzma2.h"
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#include "unxz/xz_private.h"
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#include "unxz/xz_stream.h"
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IF_DESKTOP(long long) int FAST_FUNC
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unpack_xz_stream(int src_fd, int dst_fd)
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{
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struct xz_buf iobuf;
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struct xz_dec *state;
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unsigned char *membuf;
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IF_DESKTOP(long long) int total = 0;
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enum {
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IN_SIZE = 4 * 1024,
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OUT_SIZE = 60 * 1024,
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};
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membuf = xmalloc(IN_SIZE + OUT_SIZE);
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memset(&iobuf, 0, sizeof(iobuf));
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iobuf.in = membuf;
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iobuf.out = membuf + IN_SIZE;
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iobuf.out_size = OUT_SIZE;
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state = xz_dec_init(64*1024); /* initial dict of 64k */
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xz_crc32_init(state->crc32_table);
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while (1) {
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enum xz_ret r;
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int insz, rd, outpos;
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iobuf.in_size -= iobuf.in_pos;
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insz = iobuf.in_size;
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if (insz)
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memmove(membuf, membuf + iobuf.in_pos, insz);
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iobuf.in_pos = 0;
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rd = IN_SIZE - insz;
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if (rd) {
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rd = safe_read(src_fd, membuf + insz, rd);
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if (rd < 0) {
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bb_error_msg("read error");
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total = -1;
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break;
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}
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iobuf.in_size = insz + rd;
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}
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// bb_error_msg(">in pos:%d size:%d out pos:%d size:%d",
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// iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size);
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r = xz_dec_run(state, &iobuf);
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// bb_error_msg("<in pos:%d size:%d out pos:%d size:%d r:%d",
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// iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size, r);
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outpos = iobuf.out_pos;
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if (outpos) {
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xwrite(dst_fd, iobuf.out, outpos);
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IF_DESKTOP(total += outpos;)
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}
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if (r == XZ_STREAM_END
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/* this happens even with well-formed files: */
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|| (r == XZ_BUF_ERROR && insz == 0 && outpos == 0)
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) {
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break;
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}
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if (r != XZ_OK) {
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bb_error_msg("corrupted data");
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total = -1;
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break;
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}
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iobuf.out_pos = 0;
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}
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xz_dec_end(state);
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free(membuf);
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return total;
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}
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