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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