summaryrefslogtreecommitdiff
path: root/dviware/dvisvgm/libs/brotli/enc/hash_composite_inc.h
blob: b266aa2f8da470785c66014d743f9094cc434518 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
/* NOLINT(build/header_guard) */
/* Copyright 2018 Google Inc. All Rights Reserved.

   Distributed under MIT license.
   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/

/* template parameters: FN, HASHER_A, HASHER_B */

/* Composite hasher: This hasher allows to combine two other hashers, HASHER_A
   and HASHER_B. */

#define HashComposite HASHER()

#define FN_A(X) EXPAND_CAT(X, HASHER_A)
#define FN_B(X) EXPAND_CAT(X, HASHER_B)

static BROTLI_INLINE size_t FN(HashTypeLength)(void) {
  size_t a =  FN_A(HashTypeLength)();
  size_t b =  FN_B(HashTypeLength)();
  return a > b ? a : b;
}

static BROTLI_INLINE size_t FN(StoreLookahead)(void) {
  size_t a =  FN_A(StoreLookahead)();
  size_t b =  FN_B(StoreLookahead)();
  return a > b ? a : b;
}

typedef struct HashComposite {
  HasherHandle ha;
  HasherHandle hb;
  const BrotliEncoderParams* params;
} HashComposite;

static BROTLI_INLINE HashComposite* FN(Self)(HasherHandle handle) {
  return (HashComposite*)&(GetHasherCommon(handle)[1]);
}

static void FN(Initialize)(
    HasherHandle handle, const BrotliEncoderParams* params) {
  HashComposite* self = FN(Self)(handle);
  self->ha = 0;
  self->hb = 0;
  self->params = params;
  /* TODO: Initialize of the hashers is defered to Prepare (and params
     remembered here) because we don't get the one_shot and input_size params
     here that are needed to know the memory size of them. Instead provide
     those params to all hashers FN(Initialize) */
}

static void FN(Prepare)(HasherHandle handle, BROTLI_BOOL one_shot,
    size_t input_size, const uint8_t* data) {
  HashComposite* self = FN(Self)(handle);
  if (!self->ha) {
    HasherCommon* common_a;
    HasherCommon* common_b;

    self->ha = handle + sizeof(HasherCommon) + sizeof(HashComposite);
    common_a = (HasherCommon*)self->ha;
    common_a->params = self->params->hasher;
    common_a->is_prepared_ = BROTLI_FALSE;
    common_a->dict_num_lookups = 0;
    common_a->dict_num_matches = 0;
    FN_A(Initialize)(self->ha, self->params);

    self->hb = self->ha + sizeof(HasherCommon) + FN_A(HashMemAllocInBytes)(
        self->params, one_shot, input_size);
    common_b = (HasherCommon*)self->hb;
    common_b->params = self->params->hasher;
    common_b->is_prepared_ = BROTLI_FALSE;
    common_b->dict_num_lookups = 0;
    common_b->dict_num_matches = 0;
    FN_B(Initialize)(self->hb, self->params);
  }
  FN_A(Prepare)(self->ha, one_shot, input_size, data);
  FN_B(Prepare)(self->hb, one_shot, input_size, data);
}

static BROTLI_INLINE size_t FN(HashMemAllocInBytes)(
    const BrotliEncoderParams* params, BROTLI_BOOL one_shot,
    size_t input_size) {
  return sizeof(HashComposite) + 2 * sizeof(HasherCommon) +
      FN_A(HashMemAllocInBytes)(params, one_shot, input_size) +
      FN_B(HashMemAllocInBytes)(params, one_shot, input_size);
}

static BROTLI_INLINE void FN(Store)(HasherHandle BROTLI_RESTRICT handle,
    const uint8_t* BROTLI_RESTRICT data, const size_t mask, const size_t ix) {
  HashComposite* self = FN(Self)(handle);
  FN_A(Store)(self->ha, data, mask, ix);
  FN_B(Store)(self->hb, data, mask, ix);
}

static BROTLI_INLINE void FN(StoreRange)(HasherHandle handle,
    const uint8_t* data, const size_t mask, const size_t ix_start,
    const size_t ix_end) {
  HashComposite* self = FN(Self)(handle);
  FN_A(StoreRange)(self->ha, data, mask, ix_start, ix_end);
  FN_B(StoreRange)(self->hb, data, mask, ix_start, ix_end);
}

static BROTLI_INLINE void FN(StitchToPreviousBlock)(HasherHandle handle,
    size_t num_bytes, size_t position, const uint8_t* ringbuffer,
    size_t ring_buffer_mask) {
  HashComposite* self = FN(Self)(handle);
  FN_A(StitchToPreviousBlock)(self->ha, num_bytes, position, ringbuffer,
      ring_buffer_mask);
  FN_B(StitchToPreviousBlock)(self->hb, num_bytes, position, ringbuffer,
      ring_buffer_mask);
}

static BROTLI_INLINE void FN(PrepareDistanceCache)(
    HasherHandle handle, int* BROTLI_RESTRICT distance_cache) {
  HashComposite* self = FN(Self)(handle);
  FN_A(PrepareDistanceCache)(self->ha, distance_cache);
  FN_B(PrepareDistanceCache)(self->hb, distance_cache);
}

static BROTLI_INLINE void FN(FindLongestMatch)(HasherHandle handle,
    const BrotliEncoderDictionary* dictionary,
    const uint8_t* BROTLI_RESTRICT data, const size_t ring_buffer_mask,
    const int* BROTLI_RESTRICT distance_cache, const size_t cur_ix,
    const size_t max_length, const size_t max_backward,
    const size_t gap, const size_t max_distance,
    HasherSearchResult* BROTLI_RESTRICT out) {
  HashComposite* self = FN(Self)(handle);
  FN_A(FindLongestMatch)(self->ha, dictionary, data, ring_buffer_mask,
      distance_cache, cur_ix, max_length, max_backward, gap,
      max_distance, out);
  FN_B(FindLongestMatch)(self->hb, dictionary, data, ring_buffer_mask,
      distance_cache, cur_ix, max_length, max_backward, gap,
      max_distance, out);
}

#undef HashComposite