Added brotli enc/ and tools/ directories.

third_party/brotli/enc/compress_fragment.h

Index: third_party/brotli/enc/compress_fragment.h
diff --git a/third_party/brotli/enc/compress_fragment.h b/third_party/brotli/enc/compress_fragment.h
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index 0000000000000000000000000000000000000000..7ce05fdfb2a9aadff81909aad77bbdf2ab9175a0
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+++ b/third_party/brotli/enc/compress_fragment.h
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+/* Copyright 2015 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+// Function for fast encoding of an input fragment, independently from the input
+// history. This function uses one-pass processing: when we find a backward
+// match, we immediately emit the corresponding command and literal codes to
+// the bit stream.
+
+#ifndef BROTLI_ENC_COMPRESS_FRAGMENT_H_
+#define BROTLI_ENC_COMPRESS_FRAGMENT_H_
+
+#include "./types.h"
+
+namespace brotli {
+
+// Compresses "input" string to the "*storage" buffer as one or more complete
+// meta-blocks, and updates the "*storage_ix" bit position.
+//
+// If "is_last" is true, emits an additional empty last meta-block.
+//
+// "cmd_depth" and "cmd_bits" contain the command and distance prefix codes
+// (see comment in encode.h) used for the encoding of this input fragment.
+// If "is_last" is false, they are updated to reflect the statistics
+// of this input fragment, to be used for the encoding of the next fragment.
+//
+// "*cmd_code_numbits" is the number of bits of the compressed representation
+// of the command and distance prefix codes, and "cmd_code" is an array of
+// at least "(*cmd_code_numbits + 7) >> 3" size that contains the compressed
+// command and distance prefix codes. If "is_last" is false, these are also
+// updated to represent the updated "cmd_depth" and "cmd_bits".
+//
+// REQUIRES: "input_size" is greater than zero, or "is_last" is true.
+// REQUIRES: All elements in "table[0..table_size-1]" are initialized to zero.
+// REQUIRES: "table_size" is a power of two
+void BrotliCompressFragmentFast(const uint8_t* input, size_t input_size,
+                                bool is_last,
+                                int* table, size_t table_size,
+                                uint8_t cmd_depth[128], uint16_t cmd_bits[128],
+                                size_t* cmd_code_numbits, uint8_t* cmd_code,
+                                size_t* storage_ix, uint8_t* storage);
+
+}  // namespace brotli
+
+#endif  // BROTLI_ENC_COMPRESS_FRAGMENT_H_