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/* Gzip store backend.
Copyright (C) 1995,96,97,99,2000,01, 02 Free Software Foundation, Inc.
Written by Ludovic Courtes <ludo@chbouib.org>
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <sys/mman.h>
#include <bzlib.h>
#include <error.h>
#include <hurd.h>
#include <hurd/store.h>
#include "zipstores.h"
#ifndef DEBUG_ZIP
# undef DEBUG
#endif
#include "debug.h"
/* Convert a bzlib error into a libc error. */
static inline error_t
bzip2_error (bz_stream *stream, int zerr)
{
error_t err;
assert (zerr != BZ_OUTBUFF_FULL);
switch (zerr)
{
case BZ_OK:
case BZ_RUN_OK:
case BZ_FLUSH_OK:
case BZ_FINISH_OK:
err = 0;
break;
case BZ_MEM_ERROR:
err = ENOMEM;
break;
case BZ_CONFIG_ERROR:
err = EFTYPE;
break;
case BZ_DATA_ERROR:
case BZ_DATA_ERROR_MAGIC:
case BZ_IO_ERROR:
err = EIO;
break;
case BZ_PARAM_ERROR:
err = EINVAL;
break;
case BZ_SEQUENCE_ERROR:
err = EINVAL;
break;
default:
err = EAGAIN; /* Shoudn't happen */
}
return err;
}
/* The following macros are defined to be then used by the zip store generic
code included below. */
#define ZIP_TYPE bzip2
#define ZIP_DECOMPRESS(Stream) BZ2_bzDecompress ((Stream))
#define ZIP_DECOMPRESS_INIT(Stream) BZ2_bzDecompressInit ((Stream), 1, 0)
#define ZIP_DECOMPRESS_END(Stream) BZ2_bzDecompressEnd ((Stream));
#define ZIP_DECOMPRESS_RESET(Stream) \
ZIP_DECOMPRESS_END ((Stream)), ZIP_DECOMPRESS_INIT ((Stream))
#define ZIP_COMPRESS(Stream) BZ2_bzCompress ((Stream), BZ_RUN)
#define ZIP_COMPRESS_FINISH(Stream) BZ2_bzCompress ((Stream), BZ_FINISH)
#define ZIP_COMPRESS_INIT(Stream) BZ2_bzCompressInit ((Stream), 4, 1, 0)
#define ZIP_COMPRESS_END(Stream) BZ2_bzCompressEnd ((Stream))
/* Constants */
#define ZIP_STREAM bz_stream
#define ZIP_STREAM_END BZ_STREAM_END
#include "zipstores.c"
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