Update brotli to v1.0.0-snapshot.

third_party/brotli/enc/streams.h

-/* Copyright 2009 Google Inc. All Rights Reserved.
-
-   Distributed under MIT license.
-   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
-*/
-
-// Input and output classes for streaming brotli compression.
-
-#ifndef BROTLI_ENC_STREAMS_H_
-#define BROTLI_ENC_STREAMS_H_
-
-#include <stdio.h>
-#include <string>
-#include "./port.h"
-#include "./types.h"
-
-namespace brotli {
-
-// Input interface for the compression routines.
-class BrotliIn {
- public:
-  virtual ~BrotliIn(void) {}
-
-  // Return a pointer to the next block of input of at most n bytes.
-  // Return the actual length in *nread.
-  // At end of data, return NULL. Don't return NULL if there is more data
-  // to read, even if called with n == 0.
-  // Read will only be called if some of its bytes are needed.
-  virtual const void* Read(size_t n, size_t* nread) = 0;
-};
-
-// Output interface for the compression routines.
-class BrotliOut {
- public:
-  virtual ~BrotliOut(void) {}
-
-  // Write n bytes of data from buf.
-  // Return true if all written, false otherwise.
-  virtual bool Write(const void *buf, size_t n) = 0;
-};
-
-// Adapter class to make BrotliIn objects from raw memory.
-class BrotliMemIn : public BrotliIn {
- public:
-  BrotliMemIn(const void* buf, size_t len);
-
-  void Reset(const void* buf, size_t len);
-
-  // returns the amount of data consumed
-  size_t position(void) const { return pos_; }
-
-  const void* Read(size_t n, size_t* OUTPUT);
-
- private:
-  const void* buf_;  // start of input buffer
-  size_t len_;  // length of input
-  size_t pos_;  // current read position within input
-};
-
-// Adapter class to make BrotliOut objects from raw memory.
-class BrotliMemOut : public BrotliOut {
- public:
-  BrotliMemOut(void* buf, size_t len);
-
-  void Reset(void* buf, size_t len);
-
-  // returns the amount of data written
-  size_t position(void) const { return pos_; }
-
-  bool Write(const void* buf, size_t n);
-
- private:
-  void* buf_;  // start of output buffer
-  size_t len_;  // length of output
-  size_t pos_;  // current write position within output
-};
-
-// Adapter class to make BrotliOut objects from a string.
-class BrotliStringOut : public BrotliOut {
- public:
-  // Create a writer that appends its data to buf.
-  // buf->size() will grow to at most max_size
-  // buf is expected to be empty when constructing BrotliStringOut.
-  BrotliStringOut(std::string* buf, size_t max_size);
-
-  void Reset(std::string* buf, size_t max_len);
-
-  bool Write(const void* buf, size_t n);
-
- private:
-  std::string* buf_;  // start of output buffer
-  size_t max_size_;  // max length of output
-};
-
-// Adapter class to make BrotliIn object from a file.
-class BrotliFileIn : public BrotliIn {
- public:
-  BrotliFileIn(FILE* f, size_t max_read_size);
-  ~BrotliFileIn(void);
-
-  const void* Read(size_t n, size_t* bytes_read);
-
- private:
-  FILE* f_;
-  char* buf_;
-  size_t buf_size_;
-};
-
-// Adapter class to make BrotliOut object from a file.
-class BrotliFileOut : public BrotliOut {
- public:
-  explicit BrotliFileOut(FILE* f);
-
-  bool Write(const void* buf, size_t n);
- private:
-  FILE* f_;
-};
-
-}  // namespace brotli
-
-#endif  // BROTLI_ENC_STREAMS_H_