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authorDenys Vlasenko <vda.linux@googlemail.com>2010-11-03 02:38:31 +0100
committerDenys Vlasenko <vda.linux@googlemail.com>2010-11-03 02:38:31 +0100
commit833d4e7f84f59099ee66eabfa3457ebb7d37eaa8 (patch)
tree3be84e1049707ce8077291065fe3689497c69b9c /archival/libarchive/unxz/xz_private.h
parent5e9934028aa030312a1a2e2e32d5ceade8672beb (diff)
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rename archival/libunarchive -> archival/libarchive; move bz/ into it
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'archival/libarchive/unxz/xz_private.h')
-rw-r--r--archival/libarchive/unxz/xz_private.h159
1 files changed, 159 insertions, 0 deletions
diff --git a/archival/libarchive/unxz/xz_private.h b/archival/libarchive/unxz/xz_private.h
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+++ b/archival/libarchive/unxz/xz_private.h
@@ -0,0 +1,159 @@
1/*
2 * Private includes and definitions
3 *
4 * Author: Lasse Collin <lasse.collin@tukaani.org>
5 *
6 * This file has been put into the public domain.
7 * You can do whatever you want with this file.
8 */
9
10#ifndef XZ_PRIVATE_H
11#define XZ_PRIVATE_H
12
13#ifdef __KERNEL__
14 /* XZ_PREBOOT may be defined only via decompress_unxz.c. */
15# ifndef XZ_PREBOOT
16# include <linux/slab.h>
17# include <linux/vmalloc.h>
18# include <linux/string.h>
19# define memeq(a, b, size) (memcmp(a, b, size) == 0)
20# define memzero(buf, size) memset(buf, 0, size)
21# endif
22# include <asm/byteorder.h>
23# include <asm/unaligned.h>
24# define get_le32(p) le32_to_cpup((const uint32_t *)(p))
25 /* XZ_IGNORE_KCONFIG may be defined only via decompress_unxz.c. */
26# ifndef XZ_IGNORE_KCONFIG
27# ifdef CONFIG_XZ_DEC_X86
28# define XZ_DEC_X86
29# endif
30# ifdef CONFIG_XZ_DEC_POWERPC
31# define XZ_DEC_POWERPC
32# endif
33# ifdef CONFIG_XZ_DEC_IA64
34# define XZ_DEC_IA64
35# endif
36# ifdef CONFIG_XZ_DEC_ARM
37# define XZ_DEC_ARM
38# endif
39# ifdef CONFIG_XZ_DEC_ARMTHUMB
40# define XZ_DEC_ARMTHUMB
41# endif
42# ifdef CONFIG_XZ_DEC_SPARC
43# define XZ_DEC_SPARC
44# endif
45# endif
46# include <linux/xz.h>
47#else
48 /*
49 * For userspace builds, use a separate header to define the required
50 * macros and functions. This makes it easier to adapt the code into
51 * different environments and avoids clutter in the Linux kernel tree.
52 */
53# include "xz_config.h"
54#endif
55
56/* If no specific decoding mode is requested, enable support for all modes. */
57#if !defined(XZ_DEC_SINGLE) && !defined(XZ_DEC_PREALLOC) \
58 && !defined(XZ_DEC_DYNALLOC)
59# define XZ_DEC_SINGLE
60# define XZ_DEC_PREALLOC
61# define XZ_DEC_DYNALLOC
62#endif
63
64/*
65 * The DEC_IS_foo(mode) macros are used in "if" statements. If only some
66 * of the supported modes are enabled, these macros will evaluate to true or
67 * false at compile time and thus allow the compiler to omit unneeded code.
68 */
69#ifdef XZ_DEC_SINGLE
70# define DEC_IS_SINGLE(mode) ((mode) == XZ_SINGLE)
71#else
72# define DEC_IS_SINGLE(mode) (false)
73#endif
74
75#ifdef XZ_DEC_PREALLOC
76# define DEC_IS_PREALLOC(mode) ((mode) == XZ_PREALLOC)
77#else
78# define DEC_IS_PREALLOC(mode) (false)
79#endif
80
81#ifdef XZ_DEC_DYNALLOC
82# define DEC_IS_DYNALLOC(mode) ((mode) == XZ_DYNALLOC)
83#else
84# define DEC_IS_DYNALLOC(mode) (false)
85#endif
86
87#if !defined(XZ_DEC_SINGLE)
88# define DEC_IS_MULTI(mode) (true)
89#elif defined(XZ_DEC_PREALLOC) || defined(XZ_DEC_DYNALLOC)
90# define DEC_IS_MULTI(mode) ((mode) != XZ_SINGLE)
91#else
92# define DEC_IS_MULTI(mode) (false)
93#endif
94
95/*
96 * If any of the BCJ filter decoders are wanted, define XZ_DEC_BCJ.
97 * XZ_DEC_BCJ is used to enable generic support for BCJ decoders.
98 */
99#ifndef XZ_DEC_BCJ
100# if defined(XZ_DEC_X86) || defined(XZ_DEC_POWERPC) \
101 || defined(XZ_DEC_IA64) || defined(XZ_DEC_ARM) \
102 || defined(XZ_DEC_ARM) || defined(XZ_DEC_ARMTHUMB) \
103 || defined(XZ_DEC_SPARC)
104# define XZ_DEC_BCJ
105# endif
106#endif
107
108/*
109 * Allocate memory for LZMA2 decoder. xz_dec_lzma2_reset() must be used
110 * before calling xz_dec_lzma2_run().
111 */
112XZ_EXTERN struct xz_dec_lzma2 * XZ_FUNC xz_dec_lzma2_create(
113 enum xz_mode mode, uint32_t dict_max);
114
115/*
116 * Decode the LZMA2 properties (one byte) and reset the decoder. Return
117 * XZ_OK on success, XZ_MEMLIMIT_ERROR if the preallocated dictionary is not
118 * big enough, and XZ_OPTIONS_ERROR if props indicates something that this
119 * decoder doesn't support.
120 */
121XZ_EXTERN enum xz_ret XZ_FUNC xz_dec_lzma2_reset(
122 struct xz_dec_lzma2 *s, uint8_t props);
123
124/* Decode raw LZMA2 stream from b->in to b->out. */
125XZ_EXTERN enum xz_ret XZ_FUNC xz_dec_lzma2_run(
126 struct xz_dec_lzma2 *s, struct xz_buf *b);
127
128/* Free the memory allocated for the LZMA2 decoder. */
129XZ_EXTERN void XZ_FUNC xz_dec_lzma2_end(struct xz_dec_lzma2 *s);
130
131#ifdef XZ_DEC_BCJ
132/*
133 * Allocate memory for BCJ decoders. xz_dec_bcj_reset() must be used before
134 * calling xz_dec_bcj_run().
135 */
136XZ_EXTERN struct xz_dec_bcj * XZ_FUNC xz_dec_bcj_create(bool single_call);
137
138/*
139 * Decode the Filter ID of a BCJ filter. This implementation doesn't
140 * support custom start offsets, so no decoding of Filter Properties
141 * is needed. Returns XZ_OK if the given Filter ID is supported.
142 * Otherwise XZ_OPTIONS_ERROR is returned.
143 */
144XZ_EXTERN enum xz_ret XZ_FUNC xz_dec_bcj_reset(
145 struct xz_dec_bcj *s, uint8_t id);
146
147/*
148 * Decode raw BCJ + LZMA2 stream. This must be used only if there actually is
149 * a BCJ filter in the chain. If the chain has only LZMA2, xz_dec_lzma2_run()
150 * must be called directly.
151 */
152XZ_EXTERN enum xz_ret XZ_FUNC xz_dec_bcj_run(struct xz_dec_bcj *s,
153 struct xz_dec_lzma2 *lzma2, struct xz_buf *b);
154
155/* Free the memory allocated for the BCJ filters. */
156#define xz_dec_bcj_end(s) kfree(s)
157#endif
158
159#endif
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