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fix wording

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PiperOrigin-RevId: 576788685
This commit is contained in:
Evgenii Kliuchnikov 2023-10-26 02:02:51 -07:00 committed by Copybara-Service
parent 53947c15f5
commit 9b83be233e
3 changed files with 12 additions and 12 deletions
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18
c/enc/encode.c
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@ -271,18 +271,18 @@ static void ChooseContextMap(int quality,
uint32_t two_prefix_histo[6] = { 0 };
size_t total;
size_t i;
size_t dummy;
size_t sink;
double entropy[4];
for (i = 0; i < 9; ++i) {
monogram_histo[i % 3] += bigram_histo[i];
two_prefix_histo[i % 6] += bigram_histo[i];
}
entropy[1] = ShannonEntropy(monogram_histo, 3, &dummy);
entropy[2] = (ShannonEntropy(two_prefix_histo, 3, &dummy) +
ShannonEntropy(two_prefix_histo + 3, 3, &dummy));
entropy[1] = ShannonEntropy(monogram_histo, 3, &sink);
entropy[2] = (ShannonEntropy(two_prefix_histo, 3, &sink) +
ShannonEntropy(two_prefix_histo + 3, 3, &sink));
entropy[3] = 0;
for (i = 0; i < 3; ++i) {
entropy[3] += ShannonEntropy(bigram_histo + 3 * i, 3, &dummy);
entropy[3] += ShannonEntropy(bigram_histo + 3 * i, 3, &sink);
}
total = monogram_histo[0] + monogram_histo[1] + monogram_histo[2];
@ -348,7 +348,7 @@ static BROTLI_BOOL ShouldUseComplexStaticContextMap(const uint8_t* input,
uint32_t* BROTLI_RESTRICT const context_histo = arena + 32;
uint32_t total = 0;
double entropy[3];
size_t dummy;
size_t sink;
size_t i;
ContextLut utf8_lut = BROTLI_CONTEXT_LUT(CONTEXT_UTF8);
memset(arena, 0, sizeof(arena[0]) * 32 * 14);
@ -370,10 +370,10 @@ static BROTLI_BOOL ShouldUseComplexStaticContextMap(const uint8_t* input,
prev1 = literal;
}
}
entropy[1] = ShannonEntropy(combined_histo, 32, &dummy);
entropy[1] = ShannonEntropy(combined_histo, 32, &sink);
entropy[2] = 0;
for (i = 0; i < 13; ++i) {
entropy[2] += ShannonEntropy(context_histo + (i << 5), 32, &dummy);
entropy[2] += ShannonEntropy(context_histo + (i << 5), 32, &sink);
}
entropy[0] = 1.0 / (double)total;
entropy[1] *= entropy[0];
@ -817,7 +817,7 @@ static void CopyInputToRingBuffer(BrotliEncoderState* s,
reading new bytes from the input. However, at the last few indexes of
the ring buffer, there are not enough bytes to build full-length
substrings from. Since the hash table always contains full-length
substrings, we erase with dummy zeros here to make sure that those
substrings, we overwrite with zeros here to make sure that those
substrings will contain zeros at the end instead of uninitialized
data.

4
c/enc/encoder_dict.c
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@ -118,8 +118,8 @@ static uint32_t BrotliTrieAlloc(MemoryManager* m, size_t num, BrotliTrie* trie,
keep_index = (uint32_t)(*keep - trie->pool);
}
if (trie->pool_size == 0) {
/* Have a dummy node in the front. We do not want the result to be 0, it
must be at least 1, 0 represents "null pointer" */
/* Have a placeholder node in the front. We do not want the result to be 0,
it must be at least 1, 0 represents "null pointer" */
trie->pool_size = 1;
}
BROTLI_ENSURE_CAPACITY(m, BrotliTrieNode, trie->pool, trie->pool_capacity,

2
research/brotlidump.py
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@ -2240,7 +2240,7 @@ __test__ = {
'file': """
>>> try: Layout(BitStream(
... open("H:/Downloads/brotli-master/tests/testdata/10x10y.compressed",'rb')
... open("./tests/testdata/10x10y.compressed",'rb')
... .read())).processStream()
... except NotImplementedError: pass
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