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| -rw-r--r-- | archival/libunarchive/decompress_unxz.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/archival/libunarchive/decompress_unxz.c b/archival/libunarchive/decompress_unxz.c new file mode 100644 index 000000000..0ae789160 --- /dev/null +++ b/archival/libunarchive/decompress_unxz.c @@ -0,0 +1,116 @@ +/* + * 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 unxzbz/ 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_DEBUG_MSG(...) bb_error_msg(__VA_ARGS) +#define XZ_REALLOC_DICT_BUF(ptr, size) xrealloc(ptr, size) +#define XZ_FUNC FAST_FUNC +#define XZ_EXTERN static + +#define xz_crc32_init(table) crc32_filltable(table, /*endian:*/ 0) +static uint32_t xz_crc32(uint32_t *crc32_table, + 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; +} +#define xz_crc32 xz_crc32 + +#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_stdin(void) +{ + 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; + + state = xz_dec_init(64*1024); /* initial dict of 64k */ + xz_crc32_init(state->crc32_table); + + 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(STDIN_FILENO, 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(STDOUT_FILENO, iobuf.out, outpos); + IF_DESKTOP(total += outpos;) + } + if (r == XZ_STREAM_END + || (r == XZ_BUF_ERROR && insz == 0 && outpos == 0) + ) { + break; + } + if (r != XZ_OK) { + bb_error_msg("corrupted data"); + total = -1; + break; + } + iobuf.out_pos = 0; + } + xz_dec_end(state); + free(membuf); + + return total; +} |