[3320] | 1 | /*
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| 2 | * Private includes and definitions for userspace use of XZ Embedded
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| 3 | *
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| 4 | * Author: Lasse Collin <lasse.collin@tukaani.org>
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| 5 | *
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| 6 | * This file has been put into the public domain.
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| 7 | * You can do whatever you want with this file.
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| 8 | */
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| 9 |
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| 10 | #ifndef XZ_CONFIG_H
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| 11 | #define XZ_CONFIG_H
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| 12 |
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| 13 | /* Uncomment as needed to enable BCJ filter decoders. */
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| 14 | /* #define XZ_DEC_X86 */
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| 15 | /* #define XZ_DEC_POWERPC */
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| 16 | /* #define XZ_DEC_IA64 */
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| 17 | /* #define XZ_DEC_ARM */
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| 18 | /* #define XZ_DEC_ARMTHUMB */
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| 19 | /* #define XZ_DEC_SPARC */
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| 20 |
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| 21 | #include <stdbool.h>
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| 22 | #include <stdlib.h>
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| 23 | #include <string.h>
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| 24 |
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| 25 | #include "xz.h"
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| 26 |
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| 27 | #define kmalloc(size, flags) malloc(size)
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| 28 | #define kfree(ptr) free(ptr)
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| 29 | #define vmalloc(size) malloc(size)
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| 30 | #define vfree(ptr) free(ptr)
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| 31 |
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| 32 | #define memeq(a, b, size) (memcmp(a, b, size) == 0)
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| 33 | #define memzero(buf, size) memset(buf, 0, size)
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| 34 |
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| 35 | #undef min
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| 36 | #undef min_t
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| 37 | #define min(x, y) ((x) < (y) ? (x) : (y))
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| 38 | #define min_t(type, x, y) min(x, y)
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| 39 |
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| 40 | /*
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| 41 | * Some functions have been marked with __always_inline to keep the
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| 42 | * performance reasonable even when the compiler is optimizing for
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| 43 | * small code size. You may be able to save a few bytes by #defining
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| 44 | * __always_inline to plain inline, but don't complain if the code
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| 45 | * becomes slow.
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| 46 | *
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| 47 | * NOTE: System headers on GNU/Linux may #define this macro already,
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| 48 | * so if you want to change it, you need to #undef it first.
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| 49 | */
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| 50 | #ifndef __always_inline
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| 51 | # ifdef __GNUC__
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| 52 | # define __always_inline \
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| 53 | inline __attribute__((__always_inline__))
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| 54 | # else
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| 55 | # define __always_inline inline
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| 56 | # endif
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| 57 | #endif
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| 58 |
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| 59 | /*
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| 60 | * Some functions are marked to never be inlined to reduce stack usage.
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| 61 | * If you don't care about stack usage, you may want to modify this so
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| 62 | * that noinline_for_stack is #defined to be empty even when using GCC.
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| 63 | * Doing so may save a few bytes in binary size.
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| 64 | */
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| 65 | #ifndef noinline_for_stack
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| 66 | # ifdef __GNUC__
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| 67 | # define noinline_for_stack __attribute__((__noinline__))
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| 68 | # else
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| 69 | # define noinline_for_stack
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| 70 | # endif
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| 71 | #endif
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| 72 |
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| 73 | /* Inline functions to access unaligned unsigned 32-bit integers */
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| 74 | #ifndef get_unaligned_le32
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| 75 | static inline uint32_t XZ_FUNC get_unaligned_le32(const uint8_t *buf)
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| 76 | {
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| 77 | return (uint32_t)buf[0]
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| 78 | | ((uint32_t)buf[1] << 8)
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| 79 | | ((uint32_t)buf[2] << 16)
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| 80 | | ((uint32_t)buf[3] << 24);
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| 81 | }
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| 82 | #endif
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| 83 |
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| 84 | #ifndef get_unaligned_be32
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| 85 | static inline uint32_t XZ_FUNC get_unaligned_be32(const uint8_t *buf)
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| 86 | {
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| 87 | return (uint32_t)(buf[0] << 24)
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| 88 | | ((uint32_t)buf[1] << 16)
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| 89 | | ((uint32_t)buf[2] << 8)
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| 90 | | (uint32_t)buf[3];
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| 91 | }
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| 92 | #endif
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| 93 |
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| 94 | #ifndef put_unaligned_le32
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| 95 | static inline void XZ_FUNC put_unaligned_le32(uint32_t val, uint8_t *buf)
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| 96 | {
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| 97 | buf[0] = (uint8_t)val;
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| 98 | buf[1] = (uint8_t)(val >> 8);
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| 99 | buf[2] = (uint8_t)(val >> 16);
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| 100 | buf[3] = (uint8_t)(val >> 24);
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| 101 | }
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| 102 | #endif
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| 103 |
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| 104 | #ifndef put_unaligned_be32
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| 105 | static inline void XZ_FUNC put_unaligned_be32(uint32_t val, uint8_t *buf)
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| 106 | {
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| 107 | buf[0] = (uint8_t)(val >> 24);
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| 108 | buf[1] = (uint8_t)(val >> 16);
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| 109 | buf[2] = (uint8_t)(val >> 8);
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| 110 | buf[3] = (uint8_t)val;
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| 111 | }
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| 112 | #endif
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| 113 |
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| 114 | /*
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| 115 | * Use get_unaligned_le32() also for aligned access for simplicity. On
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| 116 | * little endian systems, #define get_le32(ptr) (*(const uint32_t *)(ptr))
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| 117 | * could save a few bytes in code size.
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| 118 | */
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| 119 | #ifndef get_le32
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| 120 | # define get_le32 get_unaligned_le32
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| 121 | #endif
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| 122 |
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| 123 | #endif
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