f0aff67c47
* grub-core/io/xzio.c: New file. * grub-core/lib/xzembed/xz.h: New file (from xembed). * grub-core/lib/xzembed/xz_config.h: Likewise. * grub-core/lib/xzembed/xz_dec_bcj.c: Likewise. * grub-core/lib/xzembed/xz_dec_lzma2.c: Likewise. * grub-core/lib/xzembed/xz_dec_stream.c: Likewise. * grub-core/lib/xzembed/xz_lzma2.h: Likewise. * grub-core/lib/xzembed/xz_private.h: Likewise. * grub-core/lib/xzembed/xz_stream.h: Likewise. * include/grub/file.h (grub_file_filter_id): New compression filter GRUB_FILE_FILTER_XZIO.
96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
/* xz_private.h - Private includes and definitions */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* This file is based on code from XZ embedded project
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* http://tukaani.org/xz/embedded.html
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*/
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#ifndef XZ_PRIVATE_H
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#define XZ_PRIVATE_H
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/*
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* For userspace builds, use a separate header to define the required
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* macros and functions. This makes it easier to adapt the code into
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* different environments and avoids clutter in the Linux kernel tree.
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*/
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#include "xz_config.h"
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/*
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* If any of the BCJ filter decoders are wanted, define XZ_DEC_BCJ.
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* XZ_DEC_BCJ is used to enable generic support for BCJ decoders.
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*/
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#ifndef XZ_DEC_BCJ
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# if defined(XZ_DEC_X86) || defined(XZ_DEC_POWERPC) \
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|| defined(XZ_DEC_IA64) || defined(XZ_DEC_ARM) \
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|| defined(XZ_DEC_ARM) || defined(XZ_DEC_ARMTHUMB) \
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|| defined(XZ_DEC_SPARC)
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# define XZ_DEC_BCJ
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# endif
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#endif
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/*
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* Allocate memory for LZMA2 decoder. xz_dec_lzma2_reset() must be used
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* before calling xz_dec_lzma2_run().
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*/
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struct xz_dec_lzma2 * xz_dec_lzma2_create(
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uint32_t dict_max);
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/*
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* Decode the LZMA2 properties (one byte) and reset the decoder. Return
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* XZ_OK on success, XZ_MEMLIMIT_ERROR if the preallocated dictionary is not
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* big enough, and XZ_OPTIONS_ERROR if props indicates something that this
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* decoder doesn't support.
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*/
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enum xz_ret xz_dec_lzma2_reset(
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struct xz_dec_lzma2 *s, uint8_t props);
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/* Decode raw LZMA2 stream from b->in to b->out. */
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enum xz_ret xz_dec_lzma2_run(
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struct xz_dec_lzma2 *s, struct xz_buf *b);
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/* Free the memory allocated for the LZMA2 decoder. */
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void xz_dec_lzma2_end(struct xz_dec_lzma2 *s);
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/*
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* Allocate memory for BCJ decoders. xz_dec_bcj_reset() must be used before
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* calling xz_dec_bcj_run().
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*/
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struct xz_dec_bcj * xz_dec_bcj_create(bool single_call);
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/*
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* Decode the Filter ID of a BCJ filter. This implementation doesn't
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* support custom start offsets, so no decoding of Filter Properties
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* is needed. Returns XZ_OK if the given Filter ID is supported.
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* Otherwise XZ_OPTIONS_ERROR is returned.
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*/
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enum xz_ret xz_dec_bcj_reset(
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struct xz_dec_bcj *s, uint8_t id);
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/*
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* Decode raw BCJ + LZMA2 stream. This must be used only if there actually is
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* a BCJ filter in the chain. If the chain has only LZMA2, xz_dec_lzma2_run()
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* must be called directly.
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*/
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enum xz_ret xz_dec_bcj_run(struct xz_dec_bcj *s,
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struct xz_dec_lzma2 *lzma2, struct xz_buf *b);
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/* Free the memory allocated for the BCJ filters. */
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#define xz_dec_bcj_end(s) kfree(s)
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#endif
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