svn commit: r191172 - head/lib/libarchive
Tim Kientzle
kientzle at FreeBSD.org
Fri Apr 17 00:54:37 UTC 2009
Author: kientzle
Date: Fri Apr 17 00:54:35 2009
New Revision: 191172
URL: http://svn.freebsd.org/changeset/base/191172
Log:
Merge new xz/lzma support from libarchive.googlecode.com.
Since FreeBSD doesn't have liblzma in the base system, the
read side will always fall back to the unxz/unlzma commands for now.
(Which will in turn fail if those commands are not currently
installed.) The write side does not yet have a fallback, so
that will just fail.
Added:
head/lib/libarchive/archive_read_support_compression_xz.c (contents, props changed)
head/lib/libarchive/archive_write_set_compression_xz.c (contents, props changed)
Modified:
head/lib/libarchive/Makefile
Modified: head/lib/libarchive/Makefile
==============================================================================
--- head/lib/libarchive/Makefile Fri Apr 17 00:50:00 2009 (r191171)
+++ head/lib/libarchive/Makefile Fri Apr 17 00:54:35 2009 (r191172)
@@ -39,6 +39,7 @@ SRCS= archive_check_magic.c \
archive_read_support_compression_gzip.c \
archive_read_support_compression_none.c \
archive_read_support_compression_program.c \
+ archive_read_support_compression_xz.c \
archive_read_support_format_all.c \
archive_read_support_format_ar.c \
archive_read_support_format_cpio.c \
@@ -63,6 +64,7 @@ SRCS= archive_check_magic.c \
archive_write_set_compression_gzip.c \
archive_write_set_compression_none.c \
archive_write_set_compression_program.c \
+ archive_write_set_compression_xz.c \
archive_write_set_format.c \
archive_write_set_format_ar.c \
archive_write_set_format_by_name.c \
Added: head/lib/libarchive/archive_read_support_compression_xz.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/lib/libarchive/archive_read_support_compression_xz.c Fri Apr 17 00:54:35 2009 (r191172)
@@ -0,0 +1,642 @@
+/*-
+ * Copyright (c) 2009 Michihiro NAKAJIMA
+ * Copyright (c) 2003-2008 Tim Kientzle and Miklos Vajna
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "archive_platform.h"
+
+__FBSDID("$FreeBSD$");
+
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include <stdio.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_LZMA_H
+#include <lzma.h>
+#elif HAVE_LZMADEC_H
+#include <lzmadec.h>
+#endif
+
+#include "archive.h"
+#include "archive_private.h"
+#include "archive_read_private.h"
+
+#if HAVE_LZMA_H && HAVE_LIBLZMA
+
+struct private_data {
+ lzma_stream stream;
+ unsigned char *out_block;
+ size_t out_block_size;
+ int64_t total_out;
+ char eof; /* True = found end of compressed data. */
+};
+
+/* Combined lzma/xz filter */
+static ssize_t xz_filter_read(struct archive_read_filter *, const void **);
+static int xz_filter_close(struct archive_read_filter *);
+static int xz_lzma_bidder_init(struct archive_read_filter *);
+
+#elif HAVE_LZMADEC_H && HAVE_LIBLZMADEC
+
+struct private_data {
+ lzmadec_stream stream;
+ unsigned char *out_block;
+ size_t out_block_size;
+ int64_t total_out;
+ char eof; /* True = found end of compressed data. */
+};
+
+/* Lzma-only filter */
+static ssize_t lzma_filter_read(struct archive_read_filter *, const void **);
+static int lzma_filter_close(struct archive_read_filter *);
+#endif
+
+/*
+ * Note that we can detect xz and lzma compressed files even if we
+ * can't decompress them. (In fact, we like detecting them because we
+ * can give better error messages.) So the bid framework here gets
+ * compiled even if no lzma library is available.
+ */
+static int xz_bidder_bid(struct archive_read_filter_bidder *,
+ struct archive_read_filter *);
+static int xz_bidder_init(struct archive_read_filter *);
+static int lzma_bidder_bid(struct archive_read_filter_bidder *,
+ struct archive_read_filter *);
+static int lzma_bidder_init(struct archive_read_filter *);
+
+int
+archive_read_support_compression_xz(struct archive *_a)
+{
+ struct archive_read *a = (struct archive_read *)_a;
+ struct archive_read_filter_bidder *bidder = __archive_read_get_bidder(a);
+
+ if (bidder == NULL)
+ return (ARCHIVE_FATAL);
+
+ bidder->data = NULL;
+ bidder->bid = xz_bidder_bid;
+ bidder->init = xz_bidder_init;
+ bidder->options = NULL;
+ bidder->free = NULL;
+#if HAVE_LZMA_H && HAVE_LIBLZMA
+ return (ARCHIVE_OK);
+#else
+ archive_set_error(_a, ARCHIVE_ERRNO_MISC,
+ "Using external unxz program for xz decompression");
+ return (ARCHIVE_WARN);
+#endif
+}
+
+int
+archive_read_support_compression_lzma(struct archive *_a)
+{
+ struct archive_read *a = (struct archive_read *)_a;
+ struct archive_read_filter_bidder *bidder = __archive_read_get_bidder(a);
+
+ if (bidder == NULL)
+ return (ARCHIVE_FATAL);
+
+ bidder->data = NULL;
+ bidder->bid = lzma_bidder_bid;
+ bidder->init = lzma_bidder_init;
+ bidder->options = NULL;
+ bidder->free = NULL;
+#if HAVE_LZMA_H && HAVE_LIBLZMA
+ return (ARCHIVE_OK);
+#elif HAVE_LZMADEC_H && HAVE_LIBLZMADEC
+ return (ARCHIVE_OK);
+#else
+ archive_set_error(_a, ARCHIVE_ERRNO_MISC,
+ "Using external unlzma program for lzma decompression");
+ return (ARCHIVE_WARN);
+#endif
+}
+
+/*
+ * Test whether we can handle this data.
+ */
+static int
+xz_bidder_bid(struct archive_read_filter_bidder *self,
+ struct archive_read_filter *filter)
+{
+ const unsigned char *buffer;
+ ssize_t avail;
+ int bits_checked;
+
+ (void)self; /* UNUSED */
+
+ buffer = __archive_read_filter_ahead(filter, 6, &avail);
+ if (buffer == NULL)
+ return (0);
+
+ /*
+ * Verify Header Magic Bytes : FD 37 7A 58 5A 00
+ */
+ bits_checked = 0;
+ if (buffer[0] != 0xFD)
+ return (0);
+ bits_checked += 8;
+ if (buffer[1] != 0x37)
+ return (0);
+ bits_checked += 8;
+ if (buffer[2] != 0x7A)
+ return (0);
+ bits_checked += 8;
+ if (buffer[3] != 0x58)
+ return (0);
+ bits_checked += 8;
+ if (buffer[4] != 0x5A)
+ return (0);
+ bits_checked += 8;
+ if (buffer[5] != 0x00)
+ return (0);
+ bits_checked += 8;
+
+ return (bits_checked);
+}
+
+/*
+ * Test whether we can handle this data.
+ *
+ * <sigh> LZMA has a rather poor file signature. Zeros do not
+ * make good signature bytes as a rule, and the only non-zero byte
+ * here is an ASCII character. For example, an uncompressed tar
+ * archive whose first file is ']' would satisfy this check. It may
+ * be necessary to exclude LZMA from compression_all() because of
+ * this. Clients of libarchive would then have to explicitly enable
+ * LZMA checking instead of (or in addition to) compression_all() when
+ * they have other evidence (file name, command-line option) to go on.
+ */
+static int
+lzma_bidder_bid(struct archive_read_filter_bidder *self,
+ struct archive_read_filter *filter)
+{
+ const unsigned char *buffer;
+ ssize_t avail;
+ int bits_checked;
+
+ (void)self; /* UNUSED */
+
+ buffer = __archive_read_filter_ahead(filter, 6, &avail);
+ if (buffer == NULL)
+ return (0);
+
+ /* First byte of raw LZMA stream is always 0x5d. */
+ bits_checked = 0;
+ if (buffer[0] != 0x5d)
+ return (0);
+ bits_checked += 8;
+
+ /* Second through fifth bytes are dictionary code, stored in
+ * little-endian order. The two least-significant bytes are
+ * always zero. */
+ if (buffer[1] != 0 || buffer[2] != 0)
+ return (0);
+ bits_checked += 16;
+
+ /* ??? TODO: Fix this. ??? */
+ /* NSIS format check uses this, but I've seen tar.lzma
+ * archives where this byte is 0xff, not 0. Can it
+ * ever be anything other than 0 or 0xff?
+ */
+#if 0
+ if (buffer[5] != 0)
+ return (0);
+ bits_checked += 8;
+#endif
+
+ /* TODO: The above test is still very weak. It would be
+ * good to do better. */
+
+ return (bits_checked);
+}
+
+#if HAVE_LZMA_H && HAVE_LIBLZMA
+
+/*
+ * liblzma 4.999.7 and later support both lzma and xz streams.
+ */
+static int
+xz_bidder_init(struct archive_read_filter *self)
+{
+ self->code = ARCHIVE_COMPRESSION_XZ;
+ self->name = "xz";
+ return (xz_lzma_bidder_init(self));
+}
+
+static int
+lzma_bidder_init(struct archive_read_filter *self)
+{
+ self->code = ARCHIVE_COMPRESSION_LZMA;
+ self->name = "lzma";
+ return (xz_lzma_bidder_init(self));
+}
+
+/*
+ * Setup the callbacks.
+ */
+static int
+xz_lzma_bidder_init(struct archive_read_filter *self)
+{
+ static const size_t out_block_size = 64 * 1024;
+ void *out_block;
+ struct private_data *state;
+ int ret;
+
+ state = (struct private_data *)calloc(sizeof(*state), 1);
+ out_block = (unsigned char *)malloc(out_block_size);
+ if (state == NULL || out_block == NULL) {
+ archive_set_error(&self->archive->archive, ENOMEM,
+ "Can't allocate data for xz decompression");
+ free(out_block);
+ free(state);
+ return (ARCHIVE_FATAL);
+ }
+
+ self->data = state;
+ state->out_block_size = out_block_size;
+ state->out_block = out_block;
+ self->read = xz_filter_read;
+ self->skip = NULL; /* not supported */
+ self->close = xz_filter_close;
+
+ state->stream.avail_in = 0;
+
+ state->stream.next_out = state->out_block;
+ state->stream.avail_out = state->out_block_size;
+
+ /* Initialize compression library.
+ * TODO: I don't know what value is best for memlimit.
+ * maybe, it needs to check memory size which
+ * running system has.
+ */
+ if (self->code == ARCHIVE_COMPRESSION_XZ)
+ ret = lzma_stream_decoder(&(state->stream),
+ (1U << 23) + (1U << 21),/* memlimit */
+ LZMA_CONCATENATED);
+ else
+ ret = lzma_alone_decoder(&(state->stream),
+ (1U << 23) + (1U << 21));/* memlimit */
+
+ if (ret == LZMA_OK)
+ return (ARCHIVE_OK);
+
+ /* Library setup failed: Choose an error message and clean up. */
+ switch (ret) {
+ case LZMA_MEM_ERROR:
+ archive_set_error(&self->archive->archive, ENOMEM,
+ "Internal error initializing compression library: "
+ "Cannot allocate memory");
+ break;
+ case LZMA_OPTIONS_ERROR:
+ archive_set_error(&self->archive->archive,
+ ARCHIVE_ERRNO_MISC,
+ "Internal error initializing compression library: "
+ "Invalid or unsupported options");
+ break;
+ default:
+ archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC,
+ "Internal error initializing lzma library");
+ break;
+ }
+
+ free(state->out_block);
+ free(state);
+ self->data = NULL;
+ return (ARCHIVE_FATAL);
+}
+
+/*
+ * Return the next block of decompressed data.
+ */
+static ssize_t
+xz_filter_read(struct archive_read_filter *self, const void **p)
+{
+ struct private_data *state;
+ size_t decompressed;
+ ssize_t avail_in;
+ int ret;
+
+ state = (struct private_data *)self->data;
+
+ /* Empty our output buffer. */
+ state->stream.next_out = state->out_block;
+ state->stream.avail_out = state->out_block_size;
+
+ /* Try to fill the output buffer. */
+ while (state->stream.avail_out > 0 && !state->eof) {
+ state->stream.next_in =
+ __archive_read_filter_ahead(self->upstream, 1, &avail_in);
+ if (state->stream.next_in == NULL && avail_in < 0)
+ return (ARCHIVE_FATAL);
+ state->stream.avail_in = avail_in;
+
+ /* Decompress as much as we can in one pass. */
+ ret = lzma_code(&(state->stream),
+ (state->stream.avail_in == 0)? LZMA_FINISH: LZMA_RUN);
+ switch (ret) {
+ case LZMA_STREAM_END: /* Found end of stream. */
+ state->eof = 1;
+ /* FALL THROUGH */
+ case LZMA_OK: /* Decompressor made some progress. */
+ __archive_read_filter_consume(self->upstream,
+ avail_in - state->stream.avail_in);
+ break;
+ case LZMA_MEM_ERROR:
+ archive_set_error(&self->archive->archive, ENOMEM,
+ "Lzma library error: Cannot allocate memory");
+ return (ARCHIVE_FATAL);
+ case LZMA_MEMLIMIT_ERROR:
+ archive_set_error(&self->archive->archive, ENOMEM,
+ "Lzma library error: Out of memory");
+ return (ARCHIVE_FATAL);
+ case LZMA_FORMAT_ERROR:
+ archive_set_error(&self->archive->archive,
+ ARCHIVE_ERRNO_MISC,
+ "Lzma library error: format not recognized");
+ return (ARCHIVE_FATAL);
+ case LZMA_OPTIONS_ERROR:
+ archive_set_error(&self->archive->archive,
+ ARCHIVE_ERRNO_MISC,
+ "Lzma library error: Invalid options");
+ return (ARCHIVE_FATAL);
+ case LZMA_DATA_ERROR:
+ archive_set_error(&self->archive->archive,
+ ARCHIVE_ERRNO_MISC,
+ "Lzma library error: Corrupted input data");
+ return (ARCHIVE_FATAL);
+ case LZMA_BUF_ERROR:
+ archive_set_error(&self->archive->archive,
+ ARCHIVE_ERRNO_MISC,
+ "Lzma library error: No progress is possible");
+ return (ARCHIVE_FATAL);
+ default:
+ /* Return an error. */
+ archive_set_error(&self->archive->archive,
+ ARCHIVE_ERRNO_MISC,
+ "Lzma decompression failed: Unknown error");
+ return (ARCHIVE_FATAL);
+ }
+ }
+
+ decompressed = state->stream.next_out - state->out_block;
+ state->total_out += decompressed;
+ if (decompressed == 0)
+ *p = NULL;
+ else
+ *p = state->out_block;
+ return (decompressed);
+}
+
+/*
+ * Clean up the decompressor.
+ */
+static int
+xz_filter_close(struct archive_read_filter *self)
+{
+ struct private_data *state;
+
+ state = (struct private_data *)self->data;
+ lzma_end(&(state->stream));
+ free(state->out_block);
+ free(state);
+ return (ARCHIVE_OK);
+}
+
+#else
+
+#if HAVE_LZMADEC_H && HAVE_LIBLZMADEC
+
+/*
+ * If we have the older liblzmadec library, then we can handle
+ * LZMA streams but not XZ streams.
+ */
+
+/*
+ * Setup the callbacks.
+ */
+static int
+lzma_bidder_init(struct archive_read_filter *self)
+{
+ static const size_t out_block_size = 64 * 1024;
+ void *out_block;
+ struct private_data *state;
+ ssize_t ret, avail_in;
+
+ self->code = ARCHIVE_COMPRESSION_LZMA;
+ self->name = "lzma";
+
+ state = (struct private_data *)calloc(sizeof(*state), 1);
+ out_block = (unsigned char *)malloc(out_block_size);
+ if (state == NULL || out_block == NULL) {
+ archive_set_error(&self->archive->archive, ENOMEM,
+ "Can't allocate data for lzma decompression");
+ free(out_block);
+ free(state);
+ return (ARCHIVE_FATAL);
+ }
+
+ self->data = state;
+ state->out_block_size = out_block_size;
+ state->out_block = out_block;
+ self->read = lzma_filter_read;
+ self->skip = NULL; /* not supported */
+ self->close = lzma_filter_close;
+
+ /* Prime the lzma library with 18 bytes of input. */
+ state->stream.next_in = (unsigned char *)(uintptr_t)
+ __archive_read_filter_ahead(self->upstream, 18, &avail_in);
+ if (state->stream.next_in == NULL)
+ return (ARCHIVE_FATAL);
+ state->stream.avail_in = avail_in;
+ state->stream.next_out = state->out_block;
+ state->stream.avail_out = state->out_block_size;
+
+ /* Initialize compression library. */
+ ret = lzmadec_init(&(state->stream));
+ __archive_read_filter_consume(self->upstream,
+ avail_in - state->stream.avail_in);
+ if (ret == LZMADEC_OK)
+ return (ARCHIVE_OK);
+
+ /* Library setup failed: Clean up. */
+ archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC,
+ "Internal error initializing lzma library");
+
+ /* Override the error message if we know what really went wrong. */
+ switch (ret) {
+ case LZMADEC_HEADER_ERROR:
+ archive_set_error(&self->archive->archive,
+ ARCHIVE_ERRNO_MISC,
+ "Internal error initializing compression library: "
+ "invalid header");
+ break;
+ case LZMADEC_MEM_ERROR:
+ archive_set_error(&self->archive->archive, ENOMEM,
+ "Internal error initializing compression library: "
+ "out of memory");
+ break;
+ }
+
+ free(state->out_block);
+ free(state);
+ self->data = NULL;
+ return (ARCHIVE_FATAL);
+}
+
+/*
+ * Return the next block of decompressed data.
+ */
+static ssize_t
+lzma_filter_read(struct archive_read_filter *self, const void **p)
+{
+ struct private_data *state;
+ size_t decompressed;
+ ssize_t avail_in, ret;
+
+ state = (struct private_data *)self->data;
+
+ /* Empty our output buffer. */
+ state->stream.next_out = state->out_block;
+ state->stream.avail_out = state->out_block_size;
+
+ /* Try to fill the output buffer. */
+ while (state->stream.avail_out > 0 && !state->eof) {
+ state->stream.next_in = (unsigned char *)(uintptr_t)
+ __archive_read_filter_ahead(self->upstream, 1, &avail_in);
+ if (state->stream.next_in == NULL && avail_in < 0)
+ return (ARCHIVE_FATAL);
+ state->stream.avail_in = avail_in;
+
+ /* Decompress as much as we can in one pass. */
+ ret = lzmadec_decode(&(state->stream), avail_in == 0);
+ switch (ret) {
+ case LZMADEC_STREAM_END: /* Found end of stream. */
+ state->eof = 1;
+ /* FALL THROUGH */
+ case LZMADEC_OK: /* Decompressor made some progress. */
+ __archive_read_filter_consume(self->upstream,
+ avail_in - state->stream.avail_in);
+ break;
+ case LZMADEC_BUF_ERROR: /* Insufficient input data? */
+ archive_set_error(&self->archive->archive,
+ ARCHIVE_ERRNO_MISC,
+ "Insufficient compressed data");
+ return (ARCHIVE_FATAL);
+ default:
+ /* Return an error. */
+ archive_set_error(&self->archive->archive,
+ ARCHIVE_ERRNO_MISC,
+ "Lzma decompression failed");
+ return (ARCHIVE_FATAL);
+ }
+ }
+
+ decompressed = state->stream.next_out - state->out_block;
+ state->total_out += decompressed;
+ if (decompressed == 0)
+ *p = NULL;
+ else
+ *p = state->out_block;
+ return (decompressed);
+}
+
+/*
+ * Clean up the decompressor.
+ */
+static int
+lzma_filter_close(struct archive_read_filter *self)
+{
+ struct private_data *state;
+ int ret;
+
+ state = (struct private_data *)self->data;
+ ret = ARCHIVE_OK;
+ switch (lzmadec_end(&(state->stream))) {
+ case LZMADEC_OK:
+ break;
+ default:
+ archive_set_error(&(self->archive->archive),
+ ARCHIVE_ERRNO_MISC,
+ "Failed to clean up %s compressor",
+ self->archive->archive.compression_name);
+ ret = ARCHIVE_FATAL;
+ }
+
+ free(state->out_block);
+ free(state);
+ return (ret);
+}
+
+#else
+
+/*
+ *
+ * If we have no suitable library on this system, we can't actually do
+ * the decompression. We can, however, still detect compressed
+ * archives and emit a useful message.
+ *
+ */
+static int
+lzma_bidder_init(struct archive_read_filter *self)
+{
+ int r;
+
+ r = __archive_read_program(self, "unlzma");
+ /* Note: We set the format here even if __archive_read_program()
+ * above fails. We do, after all, know what the format is
+ * even if we weren't able to read it. */
+ self->code = ARCHIVE_COMPRESSION_LZMA;
+ self->name = "lzma";
+ return (r);
+}
+
+#endif /* HAVE_LZMADEC_H */
+
+
+static int
+xz_bidder_init(struct archive_read_filter *self)
+{
+ int r;
+
+ r = __archive_read_program(self, "unxz");
+ /* Note: We set the format here even if __archive_read_program()
+ * above fails. We do, after all, know what the format is
+ * even if we weren't able to read it. */
+ self->code = ARCHIVE_COMPRESSION_XZ;
+ self->name = "xz";
+ return (r);
+}
+
+
+#endif /* HAVE_LZMA_H */
Added: head/lib/libarchive/archive_write_set_compression_xz.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/lib/libarchive/archive_write_set_compression_xz.c Fri Apr 17 00:54:35 2009 (r191172)
@@ -0,0 +1,439 @@
+/*-
+ * Copyright (c) 2009 Michihiro NAKAJIMA
+ * Copyright (c) 2003-2007 Tim Kientzle
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "archive_platform.h"
+
+__FBSDID("$FreeBSD$");
+
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#include <time.h>
+#ifdef HAVE_LZMA_H
+#include <lzma.h>
+#endif
+
+#include "archive.h"
+#include "archive_private.h"
+#include "archive_write_private.h"
+
+#ifndef HAVE_LZMA_H
+int
+archive_write_set_compression_xz(struct archive *a)
+{
+ archive_set_error(a, ARCHIVE_ERRNO_MISC,
+ "xz compression not supported on this platform");
+ return (ARCHIVE_FATAL);
+}
+
+int
+archive_write_set_compression_lzma(struct archive *a)
+{
+ archive_set_error(a, ARCHIVE_ERRNO_MISC,
+ "lzma compression not supported on this platform");
+ return (ARCHIVE_FATAL);
+}
+#else
+/* Don't compile this if we don't have liblzma. */
+
+struct private_data {
+ lzma_stream stream;
+ lzma_filter lzmafilters[2];
+ lzma_options_lzma lzma_opt;
+ int64_t total_in;
+ unsigned char *compressed;
+ size_t compressed_buffer_size;
+};
+
+struct private_config {
+ int compression_level;
+};
+
+static int archive_compressor_xz_init(struct archive_write *);
+static int archive_compressor_xz_options(struct archive_write *,
+ const char *, const char *);
+static int archive_compressor_xz_finish(struct archive_write *);
+static int archive_compressor_xz_write(struct archive_write *,
+ const void *, size_t);
+static int drive_compressor(struct archive_write *, struct private_data *,
+ int finishing);
+
+
+/*
+ * Allocate, initialize and return a archive object.
+ */
+int
+archive_write_set_compression_xz(struct archive *_a)
+{
+ struct private_config *config;
+ struct archive_write *a = (struct archive_write *)_a;
+ __archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC,
+ ARCHIVE_STATE_NEW, "archive_write_set_compression_xz");
+ config = calloc(1, sizeof(*config));
+ if (config == NULL) {
+ archive_set_error(&a->archive, ENOMEM, "Out of memory");
+ return (ARCHIVE_FATAL);
+ }
+ a->compressor.config = config;
+ a->compressor.finish = archive_compressor_xz_finish;
+ config->compression_level = LZMA_PRESET_DEFAULT;
+ a->compressor.init = &archive_compressor_xz_init;
+ a->compressor.options = &archive_compressor_xz_options;
+ a->archive.compression_code = ARCHIVE_COMPRESSION_XZ;
+ a->archive.compression_name = "xz";
+ return (ARCHIVE_OK);
+}
+
+/* LZMA is handled identically, we just need a different compression
+ * code set. (The liblzma setup looks at the code to determine
+ * the one place that XZ and LZMA require different handling.) */
+int
+archive_write_set_compression_lzma(struct archive *_a)
+{
+ struct archive_write *a = (struct archive_write *)_a;
+ int r = archive_write_set_compression_xz(_a);
+ if (r != ARCHIVE_OK)
+ return (r);
+ a->archive.compression_code = ARCHIVE_COMPRESSION_LZMA;
+ a->archive.compression_name = "lzma";
+ return (ARCHIVE_OK);
+}
+
+static int
+archive_compressor_xz_init_stream(struct archive_write *a,
+ struct private_data *state)
+{
+ int ret;
+
+ state->stream = (lzma_stream)LZMA_STREAM_INIT;
+ state->stream.next_out = state->compressed;
+ state->stream.avail_out = state->compressed_buffer_size;
+ if (a->archive.compression_code == ARCHIVE_COMPRESSION_XZ)
+ ret = lzma_stream_encoder(&(state->stream),
+ state->lzmafilters, LZMA_CHECK_CRC64);
+ else
+ ret = lzma_alone_encoder(&(state->stream), &state->lzma_opt);
+ if (ret == LZMA_OK)
+ return (ARCHIVE_OK);
+
+ switch (ret) {
+ case LZMA_MEM_ERROR:
+ archive_set_error(&a->archive, ENOMEM,
+ "Internal error initializing compression library: "
+ "Cannot allocate memory");
+ break;
+ default:
+ archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
+ "Internal error initializing compression library: "
+ "It's a bug in liblzma");
+ break;
+ }
+ return (ARCHIVE_FATAL);
+}
+
+/*
+ * Setup callback.
+ */
+static int
+archive_compressor_xz_init(struct archive_write *a)
+{
+ int ret;
+ struct private_data *state;
+ struct private_config *config;
+
+ if (a->client_opener != NULL) {
+ ret = (a->client_opener)(&a->archive, a->client_data);
+ if (ret != ARCHIVE_OK)
+ return (ret);
+ }
+
+ state = (struct private_data *)malloc(sizeof(*state));
+ if (state == NULL) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Can't allocate data for compression");
+ return (ARCHIVE_FATAL);
+ }
+ memset(state, 0, sizeof(*state));
+ config = a->compressor.config;
+
+ /*
+ * See comment above. We should set compressed_buffer_size to
+ * max(bytes_per_block, 65536), but the code can't handle that yet.
+ */
+ state->compressed_buffer_size = a->bytes_per_block;
+ state->compressed = (unsigned char *)malloc(state->compressed_buffer_size);
+ if (state->compressed == NULL) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Can't allocate data for compression buffer");
+ free(state);
+ return (ARCHIVE_FATAL);
+ }
+ a->compressor.write = archive_compressor_xz_write;
+
+ /* Initialize compression library. */
+ if (lzma_lzma_preset(&state->lzma_opt, config->compression_level)) {
+ archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
+ "Internal error initializing compression library");
+ free(state->compressed);
+ free(state);
+ }
+ state->lzmafilters[0].id = LZMA_FILTER_LZMA2;
+ state->lzmafilters[0].options = &state->lzma_opt;
+ state->lzmafilters[1].id = LZMA_VLI_UNKNOWN;/* Terminate */
+ ret = archive_compressor_xz_init_stream(a, state);
+ if (ret == LZMA_OK) {
+ a->compressor.data = state;
+ return (0);
+ }
+ /* Library setup failed: clean up. */
+ free(state->compressed);
+ free(state);
+
+ return (ARCHIVE_FATAL);
+}
+
+/*
+ * Set write options.
+ */
+static int
+archive_compressor_xz_options(struct archive_write *a, const char *key,
+ const char *value)
+{
+ struct private_config *config;
+
+ config = (struct private_config *)a->compressor.config;
+ if (strcmp(key, "compression-level") == 0) {
+ if (value == NULL || !(value[0] >= '0' && value[0] <= '9') ||
+ value[1] != '\0')
+ return (ARCHIVE_WARN);
+ config->compression_level = value[0] - '0';
+ if (config->compression_level > 6)
+ config->compression_level = 6;
+ return (ARCHIVE_OK);
+ }
+
+ return (ARCHIVE_WARN);
+}
+
+/*
+ * Write data to the compressed stream.
+ */
+static int
+archive_compressor_xz_write(struct archive_write *a, const void *buff,
+ size_t length)
+{
+ struct private_data *state;
+ int ret;
+
+ state = (struct private_data *)a->compressor.data;
+ if (a->client_writer == NULL) {
+ archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER,
+ "No write callback is registered? "
+ "This is probably an internal programming error.");
+ return (ARCHIVE_FATAL);
+ }
+
+ /* Update statistics */
+ state->total_in += length;
+
+ /* Compress input data to output buffer */
+ state->stream.next_in = buff;
+ state->stream.avail_in = length;
+ if ((ret = drive_compressor(a, state, 0)) != ARCHIVE_OK)
+ return (ret);
+
+ a->archive.file_position += length;
+ return (ARCHIVE_OK);
+}
+
+
+/*
+ * Finish the compression...
+ */
+static int
+archive_compressor_xz_finish(struct archive_write *a)
+{
+ ssize_t block_length, target_block_length, bytes_written;
+ int ret;
+ struct private_data *state;
+ unsigned tocopy;
+
+ ret = ARCHIVE_OK;
+ state = (struct private_data *)a->compressor.data;
+ if (state != NULL) {
+ if (a->client_writer == NULL) {
+ archive_set_error(&a->archive,
+ ARCHIVE_ERRNO_PROGRAMMER,
+ "No write callback is registered? "
+ "This is probably an internal programming error.");
+ ret = ARCHIVE_FATAL;
+ goto cleanup;
+ }
+
+ /* By default, always pad the uncompressed data. */
+ if (a->pad_uncompressed) {
+ tocopy = a->bytes_per_block -
+ (state->total_in % a->bytes_per_block);
+ while (tocopy > 0 && tocopy < (unsigned)a->bytes_per_block) {
+ state->stream.next_in = a->nulls;
+ state->stream.avail_in = tocopy < a->null_length ?
+ tocopy : a->null_length;
+ state->total_in += state->stream.avail_in;
+ tocopy -= state->stream.avail_in;
+ ret = drive_compressor(a, state, 0);
+ if (ret != ARCHIVE_OK)
+ goto cleanup;
+ }
+ }
+
+ /* Finish compression cycle */
+ if (((ret = drive_compressor(a, state, 1))) != ARCHIVE_OK)
+ goto cleanup;
+
+ /* Optionally, pad the final compressed block. */
+ block_length = state->stream.next_out - state->compressed;
+
+ /* Tricky calculation to determine size of last block. */
+ target_block_length = block_length;
+ if (a->bytes_in_last_block <= 0)
+ /* Default or Zero: pad to full block */
+ target_block_length = a->bytes_per_block;
+ else
+ /* Round length to next multiple of bytes_in_last_block. */
+ target_block_length = a->bytes_in_last_block *
+ ( (block_length + a->bytes_in_last_block - 1) /
+ a->bytes_in_last_block);
*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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