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/*-
* Copyright (c) 2012 Michihiro NAKAJIMA
* 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("$FreeBSD$");
//#undef HAVE_LZO_LZOCONF_H
//#undef HAVE_LZO_LZO1X_H
#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_LZO_LZOCONF_H
#include <lzo/lzoconf.h>
#endif
#ifdef HAVE_LZO_LZO1X_H
#include <lzo/lzo1x.h>
#endif
#include "archive.h"
#include "archive_string.h"
#include "archive_endian.h"
#include "archive_write_private.h"
enum lzo_method {
METHOD_LZO1X_1 = 1,
METHOD_LZO1X_1_15 = 2,
METHOD_LZO1X_999 = 3
};
struct write_lzop {
int compression_level;
#if defined(HAVE_LZO_LZOCONF_H) && defined(HAVE_LZO_LZO1X_H)
unsigned char *uncompressed;
size_t uncompressed_buffer_size;
size_t uncompressed_avail_bytes;
unsigned char *compressed;
size_t compressed_buffer_size;
enum lzo_method method;
unsigned char level;
lzo_voidp work_buffer;
lzo_uint32 work_buffer_size;
char header_written;
#else
struct archive_write_program_data *pdata;
#endif
};
static int archive_write_lzop_open(struct archive_write_filter *);
static int archive_write_lzop_options(struct archive_write_filter *,
const char *, const char *);
static int archive_write_lzop_write(struct archive_write_filter *,
const void *, size_t);
static int archive_write_lzop_close(struct archive_write_filter *);
static int archive_write_lzop_free(struct archive_write_filter *);
#if defined(HAVE_LZO_LZOCONF_H) && defined(HAVE_LZO_LZO1X_H)
/* Maximum block size. */
#define BLOCK_SIZE (256 * 1024)
/* Block information is composed of uncompressed size(4 bytes),
* compressed size(4 bytes) and the checksum of uncompressed data(4 bytes)
* in this lzop writer. */
#define BLOCK_INfO_SIZE 12
#define HEADER_VERSION 9
#define HEADER_LIBVERSION 11
#define HEADER_METHOD 15
#define HEADER_LEVEL 16
#define HEADER_MTIME_LOW 25
#define HEADER_MTIME_HIGH 29
#define HEADER_H_CHECKSUM 34
/*
* Header template.
*/
static const unsigned char header[] = {
/* LZOP Magic code 9 bytes */
0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a,
/* LZOP utility version(fake data) 2 bytes */
0x10, 0x30,
/* LZO library version 2 bytes */
0x09, 0x40,
/* Minimum required LZO library version 2 bytes */
0x09, 0x40,
/* Method */
1,
/* Level */
5,
/* Flags 4 bytes
* -OS Unix
* -Stdout
* -Stdin
* -Adler32 used for uncompressed data 4 bytes */
0x03, 0x00, 0x00, 0x0d,
/* Mode (AE_IFREG | 0644) 4 bytes */
0x00, 0x00, 0x81, 0xa4,
/* Mtime low 4 bytes */
0x00, 0x00, 0x00, 0x00,
/* Mtime high 4 bytes */
0x00, 0x00, 0x00, 0x00,
/* Filename length */
0x00,
/* Header checksum 4 bytes */
0x00, 0x00, 0x00, 0x00,
};
#endif
int
archive_write_add_filter_lzop(struct archive *_a)
{
struct archive_write_filter *f = __archive_write_allocate_filter(_a);
struct write_lzop *data;
archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
ARCHIVE_STATE_NEW, "archive_write_add_filter_lzop");
data = calloc(1, sizeof(*data));
if (data == NULL) {
archive_set_error(_a, ENOMEM, "Can't allocate memory");
return (ARCHIVE_FATAL);
}
f->name = "lzop";
f->code = ARCHIVE_FILTER_LZOP;
f->data = data;
f->open = archive_write_lzop_open;
f->options = archive_write_lzop_options;
f->write = archive_write_lzop_write;
f->close = archive_write_lzop_close;
f->free = archive_write_lzop_free;
#if defined(HAVE_LZO_LZOCONF_H) && defined(HAVE_LZO_LZO1X_H)
if (lzo_init() != LZO_E_OK) {
free(data);
archive_set_error(_a, ARCHIVE_ERRNO_MISC,
"lzo_init(type check) failed");
return (ARCHIVE_FATAL);
}
if (lzo_version() < 0x940) {
free(data);
archive_set_error(_a, ARCHIVE_ERRNO_MISC,
"liblzo library is too old(%s < 0.940)",
lzo_version_string());
return (ARCHIVE_FATAL);
}
data->compression_level = 5;
return (ARCHIVE_OK);
#else
data->pdata = __archive_write_program_allocate("lzop");
if (data->pdata == NULL) {
free(data);
archive_set_error(_a, ENOMEM, "Can't allocate memory");
return (ARCHIVE_FATAL);
}
data->compression_level = 0;
/* Note: We return "warn" to inform of using an external lzop
* program. */
archive_set_error(_a, ARCHIVE_ERRNO_MISC,
"Using external lzop program for lzop compression");
return (ARCHIVE_WARN);
#endif
}
static int
archive_write_lzop_free(struct archive_write_filter *f)
{
struct write_lzop *data = (struct write_lzop *)f->data;
#if defined(HAVE_LZO_LZOCONF_H) && defined(HAVE_LZO_LZO1X_H)
free(data->uncompressed);
free(data->compressed);
free(data->work_buffer);
#else
__archive_write_program_free(data->pdata);
#endif
free(data);
return (ARCHIVE_OK);
}
static int
archive_write_lzop_options(struct archive_write_filter *f, const char *key,
const char *value)
{
struct write_lzop *data = (struct write_lzop *)f->data;
if (strcmp(key, "compression-level") == 0) {
if (value == NULL || !(value[0] >= '1' && value[0] <= '9') ||
value[1] != '\0')
return (ARCHIVE_WARN);
data->compression_level = value[0] - '0';
return (ARCHIVE_OK);
}
/* Note: The "warn" return is just to inform the options
* supervisor that we didn't handle it. It will generate
* a suitable error if no one used this option. */
return (ARCHIVE_WARN);
}
#if defined(HAVE_LZO_LZOCONF_H) && defined(HAVE_LZO_LZO1X_H)
static int
archive_write_lzop_open(struct archive_write_filter *f)
{
struct write_lzop *data = (struct write_lzop *)f->data;
int ret;
ret = __archive_write_open_filter(f->next_filter);
if (ret != ARCHIVE_OK)
return (ret);
switch (data->compression_level) {
case 1:
data->method = METHOD_LZO1X_1_15; data->level = 1; break;
default:
case 2: case 3: case 4: case 5: case 6:
data->method = METHOD_LZO1X_1; data->level = 5; break;
case 7:
data->method = METHOD_LZO1X_999; data->level = 7; break;
case 8:
data->method = METHOD_LZO1X_999; data->level = 8; break;
case 9:
data->method = METHOD_LZO1X_999; data->level = 9; break;
}
switch (data->method) {
case METHOD_LZO1X_1:
data->work_buffer_size = LZO1X_1_MEM_COMPRESS; break;
case METHOD_LZO1X_1_15:
data->work_buffer_size = LZO1X_1_15_MEM_COMPRESS; break;
case METHOD_LZO1X_999:
data->work_buffer_size = LZO1X_999_MEM_COMPRESS; break;
}
if (data->work_buffer == NULL) {
data->work_buffer = (lzo_voidp)malloc(data->work_buffer_size);
if (data->work_buffer == NULL) {
archive_set_error(f->archive, ENOMEM,
"Can't allocate data for compression buffer");
return (ARCHIVE_FATAL);
}
}
if (data->compressed == NULL) {
data->compressed_buffer_size = sizeof(header) +
BLOCK_SIZE + (BLOCK_SIZE >> 4) + 64 + 3;
data->compressed = (unsigned 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);
}
}
if (data->uncompressed == NULL) {
data->uncompressed_buffer_size = BLOCK_SIZE;
data->uncompressed = (unsigned char *)
malloc(data->uncompressed_buffer_size);
if (data->uncompressed == NULL) {
archive_set_error(f->archive, ENOMEM,
"Can't allocate data for compression buffer");
return (ARCHIVE_FATAL);
}
data->uncompressed_avail_bytes = BLOCK_SIZE;
}
return (ARCHIVE_OK);
}
static int
make_header(struct archive_write_filter *f)
{
struct write_lzop *data = (struct write_lzop *)f->data;
int64_t t;
uint32_t checksum;
memcpy(data->compressed, header, sizeof(header));
/* Overwrite library version. */
data->compressed[HEADER_LIBVERSION] = (unsigned char )
(lzo_version() >> 8) & 0xff;
data->compressed[HEADER_LIBVERSION + 1] = (unsigned char )
lzo_version() & 0xff;
/* Overwrite method and level. */
data->compressed[HEADER_METHOD] = (unsigned char)data->method;
data->compressed[HEADER_LEVEL] = data->level;
/* Overwrite mtime with current time. */
t = (int64_t)time(NULL);
archive_be32enc(&data->compressed[HEADER_MTIME_LOW],
(uint32_t)(t & 0xffffffff));
archive_be32enc(&data->compressed[HEADER_MTIME_HIGH],
(uint32_t)((t >> 32) & 0xffffffff));
/* Overwrite header checksum with calculated value. */
checksum = lzo_adler32(1, data->compressed + HEADER_VERSION,
(lzo_uint)(HEADER_H_CHECKSUM - HEADER_VERSION));
archive_be32enc(&data->compressed[HEADER_H_CHECKSUM], checksum);
return (sizeof(header));
}
static int
drive_compressor(struct archive_write_filter *f)
{
struct write_lzop *data = (struct write_lzop *)f->data;
unsigned char *p;
const int block_info_bytes = 12;
int header_bytes, r;
lzo_uint usize, csize;
uint32_t checksum;
if (!data->header_written) {
header_bytes = make_header(f);
data->header_written = 1;
} else
header_bytes = 0;
p = data->compressed;
usize = (lzo_uint)
(data->uncompressed_buffer_size - data->uncompressed_avail_bytes);
csize = 0;
switch (data->method) {
default:
case METHOD_LZO1X_1:
r = lzo1x_1_compress(data->uncompressed, usize,
p + header_bytes + block_info_bytes, &csize,
data->work_buffer);
break;
case METHOD_LZO1X_1_15:
r = lzo1x_1_15_compress(data->uncompressed, usize,
p + header_bytes + block_info_bytes, &csize,
data->work_buffer);
break;
case METHOD_LZO1X_999:
r = lzo1x_999_compress_level(data->uncompressed, usize,
p + header_bytes + block_info_bytes, &csize,
data->work_buffer, NULL, 0, 0, data->level);
break;
}
if (r != LZO_E_OK) {
archive_set_error(f->archive, ARCHIVE_ERRNO_MISC,
"Lzop compression failed: returned status %d", r);
return (ARCHIVE_FATAL);
}
/* Store uncompressed size. */
archive_be32enc(p + header_bytes, (uint32_t)usize);
/* Store the checksum of the uncompressed data. */
checksum = lzo_adler32(1, data->uncompressed, usize);
archive_be32enc(p + header_bytes + 8, checksum);
if (csize < usize) {
/* Store compressed size. */
archive_be32enc(p + header_bytes + 4, (uint32_t)csize);
r = __archive_write_filter(f->next_filter, data->compressed,
header_bytes + block_info_bytes + csize);
} else {
/*
* This case, we output uncompressed data instead.
*/
/* Store uncompressed size as compressed size. */
archive_be32enc(p + header_bytes + 4, (uint32_t)usize);
r = __archive_write_filter(f->next_filter, data->compressed,
header_bytes + block_info_bytes);
if (r != ARCHIVE_OK)
return (ARCHIVE_FATAL);
r = __archive_write_filter(f->next_filter, data->uncompressed,
usize);
}
if (r != ARCHIVE_OK)
return (ARCHIVE_FATAL);
return (ARCHIVE_OK);
}
static int
archive_write_lzop_write(struct archive_write_filter *f,
const void *buff, size_t length)
{
struct write_lzop *data = (struct write_lzop *)f->data;
const char *p = buff;
int r;
do {
if (data->uncompressed_avail_bytes > length) {
memcpy(data->uncompressed
+ data->uncompressed_buffer_size
- data->uncompressed_avail_bytes,
p, length);
data->uncompressed_avail_bytes -= length;
return (ARCHIVE_OK);
}
memcpy(data->uncompressed + data->uncompressed_buffer_size
- data->uncompressed_avail_bytes,
p, data->uncompressed_avail_bytes);
length -= data->uncompressed_avail_bytes;
p += data->uncompressed_avail_bytes;
data->uncompressed_avail_bytes = 0;
r = drive_compressor(f);
if (r != ARCHIVE_OK) return (r);
data->uncompressed_avail_bytes = BLOCK_SIZE;
} while (length);
return (ARCHIVE_OK);
}
static int
archive_write_lzop_close(struct archive_write_filter *f)
{
struct write_lzop *data = (struct write_lzop *)f->data;
const uint32_t endmark = 0;
int r;
if (data->uncompressed_avail_bytes < BLOCK_SIZE) {
/* Compress and output remaining data. */
r = drive_compressor(f);
if (r != ARCHIVE_OK)
return (r);
}
/* Write a zero uncompressed size as the end mark of the series of
* compressed block. */
r = __archive_write_filter(f->next_filter, &endmark, sizeof(endmark));
if (r != ARCHIVE_OK)
return (r);
return (__archive_write_close_filter(f->next_filter));
}
#else
static int
archive_write_lzop_open(struct archive_write_filter *f)
{
struct write_lzop *data = (struct write_lzop *)f->data;
struct archive_string as;
int r;
archive_string_init(&as);
archive_strcpy(&as, "lzop");
/* Specify compression level. */
if (data->compression_level > 0) {
archive_strappend_char(&as, ' ');
archive_strappend_char(&as, '-');
archive_strappend_char(&as, '0' + data->compression_level);
}
r = __archive_write_program_open(f, data->pdata, as.s);
archive_string_free(&as);
return (r);
}
static int
archive_write_lzop_write(struct archive_write_filter *f,
const void *buff, size_t length)
{
struct write_lzop *data = (struct write_lzop *)f->data;
return __archive_write_program_write(f, data->pdata, buff, length);
}
static int
archive_write_lzop_close(struct archive_write_filter *f)
{
struct write_lzop *data = (struct write_lzop *)f->data;
return __archive_write_program_close(f, data->pdata);
}
#endif
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