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Allow compression algorithm specification

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-09-21 20:30:28 +02:00
parent e0a8ef26e4
commit 758194b076
5 changed files with 208 additions and 55 deletions
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60
grub-core/boot/decompressor/xz.c Normal file
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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2010 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/types.h>
#include <grub/misc.h>
#include <grub/decompressor.h>
#include "xz.h"
#include "xz_stream.h"
void
grub_decompress_core (void *src, void *dst, unsigned long srcsize,
unsigned long dstsize)
{
struct xz_dec *dec;
struct xz_buf buf;
find_scratch (src, dst, srcsize, dstsize);
dec = xz_dec_init (GRUB_DECOMPRESSOR_DICT_SIZE);
buf.in = src;
buf.in_pos = 0;
buf.in_size = srcsize;
buf.out = dst;
buf.out_pos = 0;
buf.out_size = dstsize;
while (buf.in_pos != buf.in_size)
{
enum xz_ret xzret;
xzret = xz_dec_run (dec, &buf);
switch (xzret)
{
case XZ_MEMLIMIT_ERROR:
case XZ_FORMAT_ERROR:
case XZ_OPTIONS_ERROR:
case XZ_DATA_ERROR:
case XZ_BUF_ERROR:
return;
default:
break;
}
}
}