archive_write_add_filter_bzip2.c [plain text]
#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 <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
struct private_data {
int compression_level;
#if defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR)
bz_stream stream;
int64_t total_in;
char *compressed;
size_t compressed_buffer_size;
#else
struct archive_write_program_data *pdata;
#endif
};
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);
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;
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_FILTER_BZIP2;
f->name = "bzip2";
#if defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR)
return (ARCHIVE_OK);
#else
data->pdata = __archive_write_program_allocate("bzip2");
if (data->pdata == NULL) {
free(data);
archive_set_error(&a->archive, ENOMEM, "Out of memory");
return (ARCHIVE_FATAL);
}
data->compression_level = 0;
archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
"Using external bzip2 program");
return (ARCHIVE_WARN);
#endif
}
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';
if (data->compression_level < 1)
data->compression_level = 1;
return (ARCHIVE_OK);
}
return (ARCHIVE_WARN);
}
#if defined(HAVE_BZLIB_H) && defined(BZ_CONFIG_ERROR)
#define SET_NEXT_IN(st,src) \
(st)->stream.next_in = (char *)(uintptr_t)(const void *)(src)
static int drive_compressor(struct archive_write_filter *,
struct private_data *, int finishing);
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);
if (data->compressed == NULL) {
size_t bs = 65536, bpb;
if (f->archive->magic == ARCHIVE_WRITE_MAGIC) {
bpb = archive_write_get_bytes_per_block(f->archive);
if (bpb > bs)
bs = bpb;
else if (bpb != 0)
bs -= bs % bpb;
}
data->compressed_buffer_size = bs;
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;
ret = BZ2_bzCompressInit(&(data->stream),
data->compression_level, 0, 30);
if (ret == BZ_OK) {
f->data = data;
return (ARCHIVE_OK);
}
archive_set_error(f->archive, ARCHIVE_ERRNO_MISC,
"Internal error initializing compression library");
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);
}
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;
data->total_in += length;
SET_NEXT_IN(data, buff);
data->stream.avail_in = length;
if (drive_compressor(f, data, 0))
return (ARCHIVE_FATAL);
return (ARCHIVE_OK);
}
static int
archive_compressor_bzip2_close(struct archive_write_filter *f)
{
struct private_data *data = (struct private_data *)f->data;
int ret, r1;
ret = drive_compressor(f, data, 1);
if (ret == ARCHIVE_OK) {
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);
}
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) {
return (ARCHIVE_FATAL);
}
data->stream.next_out = data->compressed;
data->stream.avail_out = data->compressed_buffer_size;
}
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:
if (!finishing && data->stream.avail_in == 0)
return (ARCHIVE_OK);
break;
case BZ_FINISH_OK:
break;
case BZ_STREAM_END:
return (ARCHIVE_OK);
default:
archive_set_error(f->archive,
ARCHIVE_ERRNO_PROGRAMMER,
"Bzip2 compression failed;"
" BZ2_bzCompress() returned %d",
ret);
return (ARCHIVE_FATAL);
}
}
}
#else
static int
archive_compressor_bzip2_open(struct archive_write_filter *f)
{
struct private_data *data = (struct private_data *)f->data;
struct archive_string as;
int r;
archive_string_init(&as);
archive_strcpy(&as, "bzip2");
if (data->compression_level > 0) {
archive_strcat(&as, " -");
archive_strappend_char(&as, '0' + data->compression_level);
}
f->write = archive_compressor_bzip2_write;
r = __archive_write_program_open(f, data->pdata, as.s);
archive_string_free(&as);
return (r);
}
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;
return __archive_write_program_write(f, data->pdata, buff, length);
}
static int
archive_compressor_bzip2_close(struct archive_write_filter *f)
{
struct private_data *data = (struct private_data *)f->data;
return __archive_write_program_close(f, data->pdata);
}
static int
archive_compressor_bzip2_free(struct archive_write_filter *f)
{
struct private_data *data = (struct private_data *)f->data;
__archive_write_program_free(data->pdata);
free(data);
return (ARCHIVE_OK);
}
#endif