diff options
Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_write_add_filter_bzip2.c')
| -rw-r--r-- | Utilities/cmlibarchive/libarchive/archive_write_add_filter_bzip2.c | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_write_add_filter_bzip2.c b/Utilities/cmlibarchive/libarchive/archive_write_add_filter_bzip2.c new file mode 100644 index 000000000..096a6a4c7 --- /dev/null +++ b/Utilities/cmlibarchive/libarchive/archive_write_add_filter_bzip2.c @@ -0,0 +1,335 @@ +/*- + * 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: head/lib/libarchive/archive_write_set_compression_bzip2.c 201091 2009-12-28 02:22:41Z kientzle $"); + +#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_BZLIB_H +#include <cm_bzlib.h> +#endif + +#include "archive.h" +#include "archive_private.h" +#include "archive_write_private.h" + +#if ARCHIVE_VERSION_NUMBER < 4000000 +int +archive_write_set_compression_bzip2(struct archive *a) +{ + __archive_write_filters_free(a); + return (archive_write_add_filter_bzip2(a)); +} +#endif + +#if !defined(HAVE_BZLIB_H) || !defined(BZ_CONFIG_ERROR) +int +archive_write_add_filter_bzip2(struct archive *a) +{ + archive_set_error(a, ARCHIVE_ERRNO_MISC, + "bzip2 compression not supported on this platform"); + return (ARCHIVE_FATAL); +} +#else +/* Don't compile this if we don't have bzlib. */ + +struct private_data { + int compression_level; + bz_stream stream; + int64_t total_in; + char *compressed; + size_t compressed_buffer_size; +}; + +/* + * Yuck. bzlib.h is not const-correct, so I need this one bit + * of ugly hackery to convert a const * pointer to a non-const pointer. + */ +#define SET_NEXT_IN(st,src) \ + (st)->stream.next_in = (char *)(uintptr_t)(const void *)(src) + +static int archive_compressor_bzip2_close(struct archive_write_filter *); +static int archive_compressor_bzip2_free(struct archive_write_filter *); +static int archive_compressor_bzip2_open(struct archive_write_filter *); +static int archive_compressor_bzip2_options(struct archive_write_filter *, + const char *, const char *); +static int archive_compressor_bzip2_write(struct archive_write_filter *, + const void *, size_t); +static int drive_compressor(struct archive_write_filter *, + struct private_data *, int finishing); + +/* + * Add a bzip2 compression filter to this write handle. + */ +int +archive_write_add_filter_bzip2(struct archive *_a) +{ + struct archive_write *a = (struct archive_write *)_a; + struct archive_write_filter *f = __archive_write_allocate_filter(_a); + struct private_data *data; + + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_NEW, "archive_write_add_filter_bzip2"); + + data = calloc(1, sizeof(*data)); + if (data == NULL) { + archive_set_error(&a->archive, ENOMEM, "Out of memory"); + return (ARCHIVE_FATAL); + } + data->compression_level = 9; /* default */ + + f->data = data; + f->options = &archive_compressor_bzip2_options; + f->close = &archive_compressor_bzip2_close; + f->free = &archive_compressor_bzip2_free; + f->open = &archive_compressor_bzip2_open; + f->code = ARCHIVE_COMPRESSION_BZIP2; + f->name = "bzip2"; + return (ARCHIVE_OK); +} + +/* + * Setup callback. + */ +static int +archive_compressor_bzip2_open(struct archive_write_filter *f) +{ + struct private_data *data = (struct private_data *)f->data; + int ret; + + ret = __archive_write_open_filter(f->next_filter); + if (ret != 0) + return (ret); + + /* TODO: Find a better way to size this. (Maybe look at the */ + /* block size expected by the following filter?) */ + if (data->compressed == NULL) { + data->compressed_buffer_size = 65536; + data->compressed + = (char *)malloc(data->compressed_buffer_size); + if (data->compressed == NULL) { + archive_set_error(f->archive, ENOMEM, + "Can't allocate data for compression buffer"); + return (ARCHIVE_FATAL); + } + } + + memset(&data->stream, 0, sizeof(data->stream)); + data->stream.next_out = data->compressed; + data->stream.avail_out = data->compressed_buffer_size; + f->write = archive_compressor_bzip2_write; + + /* Initialize compression library */ + ret = BZ2_bzCompressInit(&(data->stream), + data->compression_level, 0, 30); + if (ret == BZ_OK) { + f->data = data; + return (ARCHIVE_OK); + } + + /* Library setup failed: clean up. */ + archive_set_error(f->archive, ARCHIVE_ERRNO_MISC, + "Internal error initializing compression library"); + + /* Override the error message if we know what really went wrong. */ + switch (ret) { + case BZ_PARAM_ERROR: + archive_set_error(f->archive, ARCHIVE_ERRNO_MISC, + "Internal error initializing compression library: " + "invalid setup parameter"); + break; + case BZ_MEM_ERROR: + archive_set_error(f->archive, ENOMEM, + "Internal error initializing compression library: " + "out of memory"); + break; + case BZ_CONFIG_ERROR: + archive_set_error(f->archive, ARCHIVE_ERRNO_MISC, + "Internal error initializing compression library: " + "mis-compiled library"); + break; + } + + return (ARCHIVE_FATAL); + +} + +/* + * Set write options. + */ +static int +archive_compressor_bzip2_options(struct archive_write_filter *f, + const char *key, const char *value) +{ + struct private_data *data = (struct private_data *)f->data; + + if (strcmp(key, "compression-level") == 0) { + if (value == NULL || !(value[0] >= '0' && value[0] <= '9') || + value[1] != '\0') + return (ARCHIVE_WARN); + data->compression_level = value[0] - '0'; + /* Make '0' be a synonym for '1'. */ + /* This way, bzip2 compressor supports the same 0..9 + * range of levels as gzip. */ + if (data->compression_level < 1) + data->compression_level = 1; + return (ARCHIVE_OK); + } + + return (ARCHIVE_WARN); +} + +/* + * Write data to the compressed stream. + * + * Returns ARCHIVE_OK if all data written, error otherwise. + */ +static int +archive_compressor_bzip2_write(struct archive_write_filter *f, + const void *buff, size_t length) +{ + struct private_data *data = (struct private_data *)f->data; + + /* Update statistics */ + data->total_in += length; + + /* Compress input data to output buffer */ + SET_NEXT_IN(data, buff); + data->stream.avail_in = length; + if (drive_compressor(f, data, 0)) + return (ARCHIVE_FATAL); + return (ARCHIVE_OK); +} + + +/* + * Finish the compression. + */ +static int +archive_compressor_bzip2_close(struct archive_write_filter *f) +{ + struct private_data *data = (struct private_data *)f->data; + int ret, r1; + + /* Finish compression cycle. */ + ret = drive_compressor(f, data, 1); + if (ret == ARCHIVE_OK) { + /* Write the last block */ + ret = __archive_write_filter(f->next_filter, + data->compressed, + data->compressed_buffer_size - data->stream.avail_out); + } + + switch (BZ2_bzCompressEnd(&(data->stream))) { + case BZ_OK: + break; + default: + archive_set_error(f->archive, ARCHIVE_ERRNO_PROGRAMMER, + "Failed to clean up compressor"); + ret = ARCHIVE_FATAL; + } + + r1 = __archive_write_close_filter(f->next_filter); + return (r1 < ret ? r1 : ret); +} + +static int +archive_compressor_bzip2_free(struct archive_write_filter *f) +{ + struct private_data *data = (struct private_data *)f->data; + free(data->compressed); + free(data); + f->data = NULL; + return (ARCHIVE_OK); +} + +/* + * Utility function to push input data through compressor, writing + * full output blocks as necessary. + * + * Note that this handles both the regular write case (finishing == + * false) and the end-of-archive case (finishing == true). + */ +static int +drive_compressor(struct archive_write_filter *f, + struct private_data *data, int finishing) +{ + int ret; + + for (;;) { + if (data->stream.avail_out == 0) { + ret = __archive_write_filter(f->next_filter, + data->compressed, + data->compressed_buffer_size); + if (ret != ARCHIVE_OK) { + /* TODO: Handle this write failure */ + return (ARCHIVE_FATAL); + } + data->stream.next_out = data->compressed; + data->stream.avail_out = data->compressed_buffer_size; + } + + /* If there's nothing to do, we're done. */ + if (!finishing && data->stream.avail_in == 0) + return (ARCHIVE_OK); + + ret = BZ2_bzCompress(&(data->stream), + finishing ? BZ_FINISH : BZ_RUN); + + switch (ret) { + case BZ_RUN_OK: + /* In non-finishing case, did compressor + * consume everything? */ + if (!finishing && data->stream.avail_in == 0) + return (ARCHIVE_OK); + break; + case BZ_FINISH_OK: /* Finishing: There's more work to do */ + break; + case BZ_STREAM_END: /* Finishing: all done */ + /* Only occurs in finishing case */ + return (ARCHIVE_OK); + default: + /* Any other return value indicates an error */ + archive_set_error(f->archive, + ARCHIVE_ERRNO_PROGRAMMER, + "Bzip2 compression failed;" + " BZ2_bzCompress() returned %d", + ret); + return (ARCHIVE_FATAL); + } + } +} + +#endif /* HAVE_BZLIB_H && BZ_CONFIG_ERROR */ |