| #if !defined(BROTLI_BASE64_LUT_) |
| #define BROTLI_BASE64_LUT_ |
| BROTLI_INTERNAL extern const BROTLI_MODEL("small") uint8_t kIsBase64[256]; |
| #endif |
| |
| #define HistogramType FN(Histogram) |
| |
| static void FN(BuildAndStoreEntropyCodes)( |
| MemoryManager* m, BlockEncoder* self, const HistogramType* histograms, |
| const size_t histograms_size, const size_t alphabet_size, HuffmanTree* tree, |
| const uint8_t* is_base64_histogram, size_t* storage_ix, uint8_t* storage) { |
| const size_t table_size = histograms_size * self->histogram_length_; |
| self->depths_ = BROTLI_ALLOC(m, uint8_t, table_size); |
| self->bits_ = BROTLI_ALLOC(m, uint16_t, table_size); |
| if (BROTLI_IS_OOM(m)) return; |
| |
| { |
| size_t i; |
| for (i = 0; i < histograms_size; ++i) { |
| size_t ix = i * self->histogram_length_; |
| if (self->histogram_length_ == 256 && is_base64_histogram && i < 256 && |
| is_base64_histogram[i]) { |
| size_t k; |
| memset(&self->depths_[ix], 0, 256); |
| for (k = 0; k < 256; ++k) { |
| if (kIsBase64[k]) { |
| self->depths_[ix + k] = 6; |
| } |
| } |
| BrotliConvertBitDepthsToSymbols(&self->depths_[ix], 256, |
| &self->bits_[ix]); |
| BrotliStoreHuffmanTree(&self->depths_[ix], 256, tree, storage_ix, |
| storage); |
| } else { |
| BuildAndStoreHuffmanTree( |
| &histograms[i].data_[0], self->histogram_length_, alphabet_size, |
| tree, &self->depths_[ix], &self->bits_[ix], storage_ix, storage); |
| } |
| } |
| } |
| } |
| |
| #undef HistogramType |
