diff options
Diffstat (limited to 'archival')
| -rw-r--r-- | archival/Config.in | 42 | ||||
| -rw-r--r-- | archival/Makefile.in | 1 | ||||
| -rw-r--r-- | archival/libunarchive/Makefile.in | 3 | ||||
| -rw-r--r-- | archival/libunarchive/decompress_unlzma.c | 347 | ||||
| -rw-r--r-- | archival/libunarchive/filter_accept_list_reassign.c | 4 | ||||
| -rw-r--r-- | archival/libunarchive/get_header_tar_lzma.c | 23 | ||||
| -rw-r--r-- | archival/libunarchive/rangecoder.h | 158 | ||||
| -rw-r--r-- | archival/tar.c | 24 | ||||
| -rw-r--r-- | archival/unlzma.c | 65 |
9 files changed, 663 insertions, 4 deletions
diff --git a/archival/Config.in b/archival/Config.in index db358db..e7d5deb 100644 --- a/archival/Config.in +++ b/archival/Config.in @@ -157,6 +157,14 @@ config CONFIG_FEATURE_TAR_BZIP2 If you enable this option you'll be able to extract archives compressed with bzip2. +config CONFIG_FEATURE_TAR_LZMA + bool " Enable -a option to handle .tar.lzma files" + default n + depends on CONFIG_TAR + help + If you enable this option you'll be able to extract + archives compressed with lzma. + config CONFIG_FEATURE_TAR_FROM bool " Enable -X (exclude from) and -T (include from) options)" default n @@ -212,6 +220,29 @@ config CONFIG_UNCOMPRESS uncompress is used to decompress archives created by compress. Not much used anymore, replaced by gzip/gunzip. +config CONFIG_UNLZMA + bool "unlzma" + default n + help + unlzma is a compression utility using the Lempel-Ziv-Markov chain + compression algorithm, and range coding. Compression + is generally considerably better than that achieved by the bzip2 + compressors. + + The BusyBox unlzma applet is limited to de-compression only. + On an x86 system, this applet adds about 4K. + + Unless you have a specific application which requires unlzma, you + should probably say N here. + +config CONFIG_FEATURE_LZMA_FAST + bool " Optimze unlzma for speed" + default n + depends on CONFIG_UNLZMA + help + This option reduce decompression time by about 33% at the cost of + a 2K bigger binary. + config CONFIG_UNZIP bool "unzip" default n @@ -255,4 +286,15 @@ config CONFIG_FEATURE_DEB_TAR_BZ2 You only want this if you are creating your own custom debian packages that use an internal control.tar.bz2 or data.tar.bz2. +config CONFIG_FEATURE_DEB_TAR_LZMA + bool " lzma debian packages" + default n + depends on CONFIG_DPKG || CONFIG_DPKG_DEB + help + This allows dpkg and dpkg-deb to extract deb's that are compressed + internally with lzma instead of gzip. + + You only want this if you are creating your own custom debian + packages that use an internal control.tar.lzma or data.tar.lzma. + endmenu diff --git a/archival/Makefile.in b/archival/Makefile.in index 735b659..b4fcabf 100644 --- a/archival/Makefile.in +++ b/archival/Makefile.in @@ -14,6 +14,7 @@ ARCHIVAL-y:= ARCHIVAL-$(CONFIG_APT_GET) += ARCHIVAL-$(CONFIG_AR) += ar.o ARCHIVAL-$(CONFIG_BUNZIP2) += bunzip2.o +ARCHIVAL-$(CONFIG_UNLZMA) += unlzma.o ARCHIVAL-$(CONFIG_CPIO) += cpio.o ARCHIVAL-$(CONFIG_DPKG) += dpkg.o ARCHIVAL-$(CONFIG_DPKG_DEB) += dpkg_deb.o diff --git a/archival/libunarchive/Makefile.in b/archival/libunarchive/Makefile.in index 99eb638..2b49398 100644 --- a/archival/libunarchive/Makefile.in +++ b/archival/libunarchive/Makefile.in @@ -51,17 +51,20 @@ DPKG_FILES:= \ LIBUNARCHIVE-$(CONFIG_AR) += get_header_ar.o unpack_ar_archive.o LIBUNARCHIVE-$(CONFIG_BUNZIP2) += decompress_bunzip2.o +LIBUNARCHIVE-$(CONFIG_UNLZMA) += decompress_unlzma.o LIBUNARCHIVE-$(CONFIG_CPIO) += get_header_cpio.o LIBUNARCHIVE-$(CONFIG_DPKG) += $(DPKG_FILES) LIBUNARCHIVE-$(CONFIG_DPKG_DEB) += $(DPKG_FILES) LIBUNARCHIVE-$(CONFIG_FEATURE_DEB_TAR_GZ) += $(GUNZIP_FILES) get_header_tar_gz.o LIBUNARCHIVE-$(CONFIG_FEATURE_DEB_TAR_BZ2) += decompress_bunzip2.o get_header_tar_bz2.o +LIBUNARCHIVE-$(CONFIG_FEATURE_DEB_TAR_LZMA) += decompress_unlzma.o get_header_tar_lzma.o LIBUNARCHIVE-$(CONFIG_GUNZIP) += $(GUNZIP_FILES) LIBUNARCHIVE-$(CONFIG_FEATURE_GUNZIP_UNCOMPRESS) += decompress_uncompress.o LIBUNARCHIVE-$(CONFIG_RPM2CPIO) += $(GUNZIP_FILES) get_header_cpio.o LIBUNARCHIVE-$(CONFIG_RPM) += $(GUNZIP_FILES) get_header_cpio.o LIBUNARCHIVE-$(CONFIG_TAR) += get_header_tar.o LIBUNARCHIVE-$(CONFIG_FEATURE_TAR_BZIP2) += decompress_bunzip2.o get_header_tar_bz2.o +LIBUNARCHIVE-$(CONFIG_FEATURE_TAR_LZMA) += decompress_unlzma.o get_header_tar_lzma.o LIBUNARCHIVE-$(CONFIG_FEATURE_TAR_GZIP) += $(GUNZIP_FILES) get_header_tar_gz.o LIBUNARCHIVE-$(CONFIG_FEATURE_TAR_COMPRESS) += decompress_uncompress.o LIBUNARCHIVE-$(CONFIG_UNCOMPRESS) += decompress_uncompress.o diff --git a/archival/libunarchive/decompress_unlzma.c b/archival/libunarchive/decompress_unlzma.c new file mode 100644 index 0000000..977cb48 --- /dev/null +++ b/archival/libunarchive/decompress_unlzma.c @@ -0,0 +1,347 @@ +/* + * Small lzma deflate implementation. + * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> + * + * Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/) + * Copyright (C) 1999-2005 Igor Pavlov + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> +#include <unistd.h> +#include <stdio.h> +#include <byteswap.h> + +#include "libbb.h" + +#include "rangecoder.h" + + +typedef struct { + uint8_t pos; + uint32_t dict_size; + uint64_t dst_size; +} __attribute__ ((packed)) lzma_header_t; + + +#define LZMA_BASE_SIZE 1846 +#define LZMA_LIT_SIZE 768 + +#define LZMA_NUM_POS_BITS_MAX 4 + +#define LZMA_LEN_NUM_LOW_BITS 3 +#define LZMA_LEN_NUM_MID_BITS 3 +#define LZMA_LEN_NUM_HIGH_BITS 8 + +#define LZMA_LEN_CHOICE 0 +#define LZMA_LEN_CHOICE_2 (LZMA_LEN_CHOICE + 1) +#define LZMA_LEN_LOW (LZMA_LEN_CHOICE_2 + 1) +#define LZMA_LEN_MID (LZMA_LEN_LOW \ + + (1 << (LZMA_NUM_POS_BITS_MAX + LZMA_LEN_NUM_LOW_BITS))) +#define LZMA_LEN_HIGH (LZMA_LEN_MID \ + +(1 << (LZMA_NUM_POS_BITS_MAX + LZMA_LEN_NUM_MID_BITS))) +#define LZMA_NUM_LEN_PROBS (LZMA_LEN_HIGH + (1 << LZMA_LEN_NUM_HIGH_BITS)) + +#define LZMA_NUM_STATES 12 +#define LZMA_NUM_LIT_STATES 7 + +#define LZMA_START_POS_MODEL_INDEX 4 +#define LZMA_END_POS_MODEL_INDEX 14 +#define LZMA_NUM_FULL_DISTANCES (1 << (LZMA_END_POS_MODEL_INDEX >> 1)) + +#define LZMA_NUM_POS_SLOT_BITS 6 +#define LZMA_NUM_LEN_TO_POS_STATES 4 + +#define LZMA_NUM_ALIGN_BITS 4 + +#define LZMA_MATCH_MIN_LEN 2 + +#define LZMA_IS_MATCH 0 +#define LZMA_IS_REP (LZMA_IS_MATCH + (LZMA_NUM_STATES <<LZMA_NUM_POS_BITS_MAX)) +#define LZMA_IS_REP_G0 (LZMA_IS_REP + LZMA_NUM_STATES) +#define LZMA_IS_REP_G1 (LZMA_IS_REP_G0 + LZMA_NUM_STATES) +#define LZMA_IS_REP_G2 (LZMA_IS_REP_G1 + LZMA_NUM_STATES) +#define LZMA_IS_REP_0_LONG (LZMA_IS_REP_G2 + LZMA_NUM_STATES) +#define LZMA_POS_SLOT (LZMA_IS_REP_0_LONG \ + + (LZMA_NUM_STATES << LZMA_NUM_POS_BITS_MAX)) +#define LZMA_SPEC_POS (LZMA_POS_SLOT \ + +(LZMA_NUM_LEN_TO_POS_STATES << LZMA_NUM_POS_SLOT_BITS)) +#define LZMA_ALIGN (LZMA_SPEC_POS \ + + LZMA_NUM_FULL_DISTANCES - LZMA_END_POS_MODEL_INDEX) +#define LZMA_LEN_CODER (LZMA_ALIGN + (1 << LZMA_NUM_ALIGN_BITS)) +#define LZMA_REP_LEN_CODER (LZMA_LEN_CODER + LZMA_NUM_LEN_PROBS) +#define LZMA_LITERAL (LZMA_REP_LEN_CODER + LZMA_NUM_LEN_PROBS) + + +int unlzma(int src_fd, int dst_fd) +{ + lzma_header_t header; + int lc, pb, lp; + uint32_t pos_state_mask; + uint32_t literal_pos_mask; + uint32_t pos; + uint16_t *p; + uint16_t *prob; + uint16_t *prob_lit; + int num_bits; + int num_probs; + rc_t rc; + int i, mi; + uint8_t *buffer; + uint8_t previous_byte = 0; + size_t buffer_pos = 0, global_pos = 0; + int len = 0; + int state = 0; + uint32_t rep0 = 1, rep1 = 1, rep2 = 1, rep3 = 1; + + if (read(src_fd, &header, sizeof(header)) != sizeof(header)) + bb_error_msg_and_die("can't read header"); + + if (header.pos >= (9 * 5 * 5)) + bb_error_msg_and_die("bad header"); + mi = header.pos / 9; + lc = header.pos % 9; + pb = mi / 5; + lp = mi % 5; + pos_state_mask = (1 << pb) - 1; + literal_pos_mask = (1 << lp) - 1; + +#if __BYTE_ORDER == __BIG_ENDIAN + header.dict_size = bswap_32(header.dict_size); + header.dst_size = bswap_64(header.dst_size); +#endif /* __BYTE_ORDER */ + + if (header.dict_size == 0) + header.dict_size = 1; + + buffer = xmalloc(MIN(header.dst_size, header.dict_size)); + + num_probs = LZMA_BASE_SIZE + (LZMA_LIT_SIZE << (lc + lp)); + p = xmalloc(num_probs * sizeof(*p)); + num_probs = LZMA_LITERAL + (LZMA_LIT_SIZE << (lc + lp)); + for (i = 0; i < num_probs; i++) + p[i] = (1 << RC_MODEL_TOTAL_BITS) >> 1; + + rc_init(&rc, src_fd, 0x10000); + + while (global_pos + buffer_pos < header.dst_size) { + int pos_state = (buffer_pos + global_pos) & pos_state_mask; + + prob = + p + LZMA_IS_MATCH + (state << LZMA_NUM_POS_BITS_MAX) + pos_state; + if (rc_is_bit_0(&rc, prob)) { + mi = 1; + rc_update_bit_0(&rc, prob); + prob = (p + LZMA_LITERAL + (LZMA_LIT_SIZE + * ((((buffer_pos + global_pos) & literal_pos_mask) << lc) + + (previous_byte >> (8 - lc))))); + + if (state >= LZMA_NUM_LIT_STATES) { + int match_byte; + + pos = buffer_pos - rep0; + while (pos >= header.dict_size) + pos += header.dict_size; + match_byte = buffer[pos]; + do { + int bit; + + match_byte <<= 1; + bit = match_byte & 0x100; + prob_lit = prob + 0x100 + bit + mi; + if (rc_get_bit(&rc, prob_lit, &mi)) { + if (!bit) + break; + } else { + if (bit) + break; + } + } while (mi < 0x100); + } + while (mi < 0x100) { + prob_lit = prob + mi; + rc_get_bit(&rc, prob_lit, &mi); + } + previous_byte = (uint8_t) mi; + + buffer[buffer_pos++] = previous_byte; + if (buffer_pos == header.dict_size) { + buffer_pos = 0; + global_pos += header.dict_size; + write(dst_fd, buffer, header.dict_size); + } + if (state < 4) + state = 0; + else if (state < 10) + state -= 3; + else + state -= 6; + } else { + int offset; + uint16_t *prob_len; + + rc_update_bit_1(&rc, prob); + prob = p + LZMA_IS_REP + state; + if (rc_is_bit_0(&rc, prob)) { + rc_update_bit_0(&rc, prob); + rep3 = rep2; + rep2 = rep1; + rep1 = rep0; + state = state < LZMA_NUM_LIT_STATES ? 0 : 3; + prob = p + LZMA_LEN_CODER; + } else { + rc_update_bit_1(&rc, prob); + prob = p + LZMA_IS_REP_G0 + state; + if (rc_is_bit_0(&rc, prob)) { + rc_update_bit_0(&rc, prob); + prob = (p + LZMA_IS_REP_0_LONG + + (state << LZMA_NUM_POS_BITS_MAX) + pos_state); + if (rc_is_bit_0(&rc, prob)) { + rc_update_bit_0(&rc, prob); + + state = state < LZMA_NUM_LIT_STATES ? 9 : 11; + pos = buffer_pos - rep0; + while (pos >= header.dict_size) + pos += header.dict_size; + previous_byte = buffer[pos]; + buffer[buffer_pos++] = previous_byte; + if (buffer_pos == header.dict_size) { + buffer_pos = 0; + global_pos += header.dict_size; + write(dst_fd, buffer, header.dict_size); + } + continue; + } else { + rc_update_bit_1(&rc, prob); + } + } else { + uint32_t distance; + + rc_update_bit_1(&rc, prob); + prob = p + LZMA_IS_REP_G1 + state; + if (rc_is_bit_0(&rc, prob)) { + rc_update_bit_0(&rc, prob); + distance = rep1; + } else { + rc_update_bit_1(&rc, prob); + prob = p + LZMA_IS_REP_G2 + state; + if (rc_is_bit_0(&rc, prob)) { + rc_update_bit_0(&rc, prob); + distance = rep2; + } else { + rc_update_bit_1(&rc, prob); + distance = rep3; + rep3 = rep2; + } + rep2 = rep1; + } + rep1 = rep0; + rep0 = distance; + } + state = state < LZMA_NUM_LIT_STATES ? 8 : 11; + prob = p + LZMA_REP_LEN_CODER; + } + + prob_len = prob + LZMA_LEN_CHOICE; + if (rc_is_bit_0(&rc, prob_len)) { + rc_update_bit_0(&rc, prob_len); + prob_len = (prob + LZMA_LEN_LOW + + (pos_state << LZMA_LEN_NUM_LOW_BITS)); + offset = 0; + num_bits = LZMA_LEN_NUM_LOW_BITS; + } else { + rc_update_bit_1(&rc, prob_len); + prob_len = prob + LZMA_LEN_CHOICE_2; + if (rc_is_bit_0(&rc, prob_len)) { + rc_update_bit_0(&rc, prob_len); + prob_len = (prob + LZMA_LEN_MID + + (pos_state << LZMA_LEN_NUM_MID_BITS)); + offset = 1 << LZMA_LEN_NUM_LOW_BITS; + num_bits = LZMA_LEN_NUM_MID_BITS; + } else { + rc_update_bit_1(&rc, prob_len); + prob_len = prob + LZMA_LEN_HIGH; + offset = ((1 << LZMA_LEN_NUM_LOW_BITS) + + (1 << LZMA_LEN_NUM_MID_BITS)); + num_bits = LZMA_LEN_NUM_HIGH_BITS; + } + } + rc_bit_tree_decode(&rc, prob_len, num_bits, &len); + len += offset; + + if (state < 4) { + int pos_slot; + + state += LZMA_NUM_LIT_STATES; + prob = + p + LZMA_POS_SLOT + + ((len < + LZMA_NUM_LEN_TO_POS_STATES ? len : + LZMA_NUM_LEN_TO_POS_STATES - 1) + << LZMA_NUM_POS_SLOT_BITS); + rc_bit_tree_decode(&rc, prob, LZMA_NUM_POS_SLOT_BITS, + &pos_slot); + if (pos_slot >= LZMA_START_POS_MODEL_INDEX) { + num_bits = (pos_slot >> 1) - 1; + rep0 = 2 | (pos_slot & 1); + if (pos_slot < LZMA_END_POS_MODEL_INDEX) { + rep0 <<= num_bits; + prob = p + LZMA_SPEC_POS + rep0 - pos_slot - 1; + } else { + num_bits -= LZMA_NUM_ALIGN_BITS; + while (num_bits--) + rep0 = (rep0 << 1) | rc_direct_bit(&rc); + prob = p + LZMA_ALIGN; + rep0 <<= LZMA_NUM_ALIGN_BITS; + num_bits = LZMA_NUM_ALIGN_BITS; + } + i = 1; + mi = 1; + while (num_bits--) { + if (rc_get_bit(&rc, prob + mi, &mi)) + rep0 |= i; + i <<= 1; + } + } else + rep0 = pos_slot; + if (++rep0 == 0) + break; + } + + len += LZMA_MATCH_MIN_LEN; + + do { + pos = buffer_pos - rep0; + while (pos >= header.dict_size) + pos += header.dict_size; + previous_byte = buffer[pos]; + buffer[buffer_pos++] = previous_byte; + if (buffer_pos == header.dict_size) { + buffer_pos = 0; + global_pos += header.dict_size; + write(dst_fd, buffer, header.dict_size); + } + len--; + } while (len != 0 && buffer_pos < header.dst_size); + } + } + + write(dst_fd, buffer, buffer_pos); + rc_free(&rc); + return 0; +} + +/* vi:set ts=4: */ diff --git a/archival/libunarchive/filter_accept_list_reassign.c b/archival/libunarchive/filter_accept_list_reassign.c index d043654..a09f564 100644 --- a/archival/libunarchive/filter_accept_list_reassign.c +++ b/archival/libunarchive/filter_accept_list_reassign.c @@ -50,6 +50,10 @@ extern char filter_accept_list_reassign(archive_handle_t *archive_handle) return(EXIT_SUCCESS); } #endif + if (ENABLE_FEATURE_DEB_TAR_LZMA && !strcmp(name_ptr, ".lzma")) { + archive_handle->action_data_subarchive = get_header_tar_lzma; + return(EXIT_SUCCESS); + } } return(EXIT_FAILURE); } diff --git a/archival/libunarchive/get_header_tar_lzma.c b/archival/libunarchive/get_header_tar_lzma.c new file mode 100644 index 0000000..63dc8bc --- /dev/null +++ b/archival/libunarchive/get_header_tar_lzma.c @@ -0,0 +1,23 @@ +/* + * Small lzma deflate implementation. + * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> + * + * Licensed under GPL v2, see file LICENSE in this tarball for details. + */ + +#include "unarchive.h" + +char get_header_tar_lzma(archive_handle_t * archive_handle) +{ + /* Can't lseek over pipes */ + archive_handle->seek = seek_by_char; + + archive_handle->src_fd = open_transformer(archive_handle->src_fd, unlzma); + archive_handle->offset = 0; + while (get_header_tar(archive_handle) == EXIT_SUCCESS); + + /* Can only do one file at a time */ + return EXIT_FAILURE; +} + +/* vi:set ts=4: */ diff --git a/archival/libunarchive/rangecoder.h b/archival/libunarchive/rangecoder.h new file mode 100644 index 0000000..bb41591 --- /dev/null +++ b/archival/libunarchive/rangecoder.h @@ -0,0 +1,158 @@ +/* + * Small range coder implementation for lzma. + * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> + * + * Based on LzmaDecode.c from the LZMA SDK 4.22 (http://www.7-zip.org/) + * Copyright (c) 1999-2005 Igor Pavlov + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> + +#include "libbb.h" + +#ifndef always_inline +# if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ >0) +# define always_inline __attribute__((always_inline)) inline +# else +# define always_inline inline +# endif +#endif + +#ifdef CONFIG_FEATURE_LZMA_FAST +# define speed_inline always_inline +#else +# define speed_inline +#endif + + +typedef struct { + int fd; + uint8_t *ptr; + uint8_t *buffer; + uint8_t *buffer_end; + int buffer_size; + uint32_t code; + uint32_t range; + uint32_t bound; +} rc_t; + + +#define RC_TOP_BITS 24 +#define RC_MOVE_BITS 5 +#define RC_MODEL_TOTAL_BITS 11 + + +static speed_inline void rc_read(rc_t * rc) +{ + rc->buffer_size = read(rc->fd, rc->buffer, rc->buffer_size); + if (rc->buffer_size <= 0) + bb_error_msg_and_die("unexpected EOF"); + rc->ptr = rc->buffer; + rc->buffer_end = rc->buffer + rc->buffer_size; +} + +static always_inline void rc_init(rc_t * rc, int fd, int buffer_size) +{ + int i; + + rc->fd = fd; + rc->buffer = malloc(buffer_size); + rc->buffer_size = buffer_size; + rc->buffer_end = rc->buffer + rc->buffer_size; + rc->ptr = rc->buffer_end; + + rc->code = 0; + rc->range = 0xFFFFFFFF; + for (i = 0; i < 5; i++) { + if (rc->ptr >= rc->buffer_end) + rc_read(rc); + rc->code = (rc->code << 8) | *rc->ptr++; + } +} + +static always_inline void rc_free(rc_t * rc) +{ + if (ENABLE_FEATURE_CLEAN_UP) + free(rc->buffer); +} + +static always_inline void rc_normalize(rc_t * rc) +{ + if (rc->range < (1 << RC_TOP_BITS)) { + if (rc->ptr >= rc->buffer_end) + rc_read(rc); + rc->range <<= 8; + rc->code = (rc->code << 8) | *rc->ptr++; + } +} + +static speed_inline int rc_is_bit_0(rc_t * rc, uint16_t * p) +{ + rc_normalize(rc); + rc->bound = *p * (rc->range >> RC_MODEL_TOTAL_BITS); + return rc->code < rc->bound; +} + +static speed_inline void rc_update_bit_0(rc_t * rc, uint16_t * p) +{ + rc->range = rc->bound; + *p += ((1 << RC_MODEL_TOTAL_BITS) - *p) >> RC_MOVE_BITS; +} + +static speed_inline void rc_update_bit_1(rc_t * rc, uint16_t * p) +{ + rc->range -= rc->bound; + rc->code -= rc->bound; + *p -= *p >> RC_MOVE_BITS; +} + +static speed_inline int rc_get_bit(rc_t * rc, uint16_t * p, int *symbol) +{ + if (rc_is_bit_0(rc, p)) { + rc_update_bit_0(rc, p); + *symbol *= 2; + return 0; + } else { + rc_update_bit_1(rc, p); + *symbol = *symbol * 2 + 1; + return 1; + } +} + +static always_inline int rc_direct_bit(rc_t * rc) +{ + rc_normalize(rc); + rc->range >>= 1; + if (rc->code >= rc->range) { + rc->code -= rc->range; + return 1; + } + return 0; +} + +static speed_inline void +rc_bit_tree_decode(rc_t * rc, uint16_t * p, int num_levels, int *symbol) +{ + int i = num_levels; + + *symbol = 1; + while (i--) + rc_get_bit(rc, p + *symbol, symbol); + *symbol -= 1 << num_levels; +} + +/* vi:set ts=4: */ diff --git a/archival/tar.c b/archival/tar.c index d5fa954..a4b13b5 100644 --- a/archival/tar.c +++ b/archival/tar.c @@ -615,14 +615,23 @@ static char get_header_tar_Z(archive_handle_t *archive_handle) # define TAR_OPT_AFTER_BZIP2 TAR_OPT_AFTER_CREATE #endif -#define TAR_OPT_INCLUDE_FROM (1 << (TAR_OPT_AFTER_BZIP2)) -#define TAR_OPT_EXCLUDE_FROM (1 << (TAR_OPT_AFTER_BZIP2 + 1)) +#define TAR_OPT_LZMA (1 << (TAR_OPT_AFTER_BZIP2)) +#ifdef CONFIG_FEATURE_TAR_LZMA +# define TAR_OPT_STR_LZMA "a" +# define TAR_OPT_AFTER_LZMA TAR_OPT_AFTER_BZIP2 + 1 +#else +# define TAR_OPT_STR_LZMA "" +# define TAR_OPT_AFTER_LZMA TAR_OPT_AFTER_BZIP2 +#endif + +#define TAR_OPT_INCLUDE_FROM (1 << (TAR_OPT_AFTER_LZMA)) +#define TAR_OPT_EXCLUDE_FROM (1 << (TAR_OPT_AFTER_LZMA + 1)) #ifdef CONFIG_FEATURE_TAR_FROM # define TAR_OPT_STR_FROM "T:X:" -# define TAR_OPT_AFTER_FROM TAR_OPT_AFTER_BZIP2 + 2 +# define TAR_OPT_AFTER_FROM TAR_OPT_AFTER_LZMA + 2 #else # define TAR_OPT_STR_FROM "" -# define TAR_OPT_AFTER_FROM TAR_OPT_AFTER_BZIP2 +# define TAR_OPT_AFTER_FROM TAR_OPT_AFTER_LZMA #endif #define TAR_OPT_GZIP (1 << (TAR_OPT_AFTER_FROM)) @@ -651,6 +660,7 @@ static char get_header_tar_Z(archive_handle_t *archive_handle) static const char tar_options[]="txC:f:Opvk" \ TAR_OPT_STR_CREATE \ TAR_OPT_STR_BZIP2 \ + TAR_OPT_STR_LZMA \ TAR_OPT_STR_FROM \ TAR_OPT_STR_GZIP \ TAR_OPT_STR_COMPRESS \ @@ -675,6 +685,9 @@ static const struct option tar_long_options[] = { # ifdef CONFIG_FEATURE_TAR_BZIP2 { "bzip2", 0, NULL, 'j' }, # endif +# ifdef CONFIG_FEATURE_TAR_LZMA + { "lzma", 0, NULL, 'a' }, +# endif # ifdef CONFIG_FEATURE_TAR_FROM { "files-from", 1, NULL, 'T' }, { "exclude-from", 1, NULL, 'X' }, @@ -757,6 +770,9 @@ int tar_main(int argc, char **argv) if (ENABLE_FEATURE_TAR_BZIP2 && (opt & TAR_OPT_BZIP2)) get_header_ptr = get_header_tar_bz2; + if (ENABLE_FEATURE_TAR_LZMA && (opt & TAR_OPT_LZMA)) + get_header_ptr = get_header_tar_lzma; + if (ENABLE_FEATURE_TAR_COMPRESS && (opt & TAR_OPT_UNCOMPRESS)) get_header_ptr = get_header_tar_Z; diff --git a/archival/unlzma.c b/archival/unlzma.c new file mode 100644 index 0000000..dc85cb2 --- /dev/null +++ b/archival/unlzma.c @@ -0,0 +1,65 @@ +/* + * Small lzma deflate implementation. + * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> + * + * Based on bunzip.c from busybox + * + * Licensed under GPL v2, see file LICENSE in this tarball for details. + */ + +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "busybox.h" +#include "unarchive.h" + +#define UNLZMA_OPT_STDOUT 1 + +int unlzma_main(int argc, char **argv) +{ + char *filename; + unsigned long opt; + int status, src_fd, dst_fd; + + opt = bb_getopt_ulflags(argc, argv, "c"); + + /* Set input filename and number */ + filename = argv[optind]; + if ((filename) && (filename[0] != '-') && (filename[1] != '\0')) { + /* Open input file */ + src_fd = bb_xopen(filename, O_RDONLY); + } else { + src_fd = STDIN_FILENO; + filename = 0; + } + + /* if called as lzmacat force the stdout flag */ + if ((opt & UNLZMA_OPT_STDOUT) || bb_applet_name[4] == 'c') + filename = 0; + + if (filename) { + char *extension = filename + strlen(filename) - 5; + + if (strcmp(extension, ".lzma") != 0) { + bb_error_msg_and_die("Invalid extension"); + } + *extension = 0; + dst_fd = bb_xopen(filename, O_WRONLY | O_CREAT); + } else + dst_fd = STDOUT_FILENO; + status = unlzma(src_fd, dst_fd); + if (filename) { + if (!status) + filename[strlen(filename)] = '.'; + if (unlink(filename) < 0) { + bb_error_msg_and_die("Couldn't remove %s", filename); + } + } + + return status; +} + +/* vi:set ts=4: */ |