Update from https://crrev.com/318214

third_party/brotli/dec/streams.h

+/* Copyright 2013 Google Inc. All Rights Reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+   Functions for streaming input and output.
+*/
+
+#ifndef BROTLI_DEC_STREAMS_H_
+#define BROTLI_DEC_STREAMS_H_
+
+#include <stdio.h>
+#include "./types.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+/* Function pointer type used to read len bytes into buf. Returns the */
+/* number of bytes read or -1 on error. */
+typedef int (*BrotliInputFunction)(void* data, uint8_t* buf, size_t len);
+
+/* Input callback function with associated data. */
+typedef struct {
+  BrotliInputFunction cb_;
+  void* data_;
+} BrotliInput;
+
+/* Reads len bytes into buf, using the in callback. */
+static BROTLI_INLINE int BrotliRead(BrotliInput in, uint8_t* buf, size_t len) {
+  return in.cb_(in.data_, buf, len);
+}
+
+/* Function pointer type used to write len bytes into buf. Returns the */
+/* number of bytes written or -1 on error. */
+typedef int (*BrotliOutputFunction)(void* data, const uint8_t* buf, size_t len);
+
+/* Output callback function with associated data. */
+typedef struct {
+  BrotliOutputFunction cb_;
+  void* data_;
+} BrotliOutput;
+
+/* Writes len bytes into buf, using the out callback. */
+static BROTLI_INLINE int BrotliWrite(BrotliOutput out,
+                                     const uint8_t* buf, size_t len) {
+  return out.cb_(out.data_, buf, len);
+}
+
+/* Memory region with position. */
+typedef struct {
+  const uint8_t* buffer;
+  size_t length;
+  size_t pos;
+} BrotliMemInput;
+
+/* Input callback where *data is a BrotliMemInput struct. */
+int BrotliMemInputFunction(void* data, uint8_t* buf, size_t count);
+
+/* Returns an input callback that wraps the given memory region. */
+BrotliInput BrotliInitMemInput(const uint8_t* buffer, size_t length,
+                               BrotliMemInput* mem_input);
+
+/* Output buffer with position. */
+typedef struct {
+  uint8_t* buffer;
+  size_t length;
+  size_t pos;
+} BrotliMemOutput;
+
+/* Output callback where *data is a BrotliMemOutput struct. */
+int BrotliMemOutputFunction(void* data, const uint8_t* buf, size_t count);
+
+/* Returns an output callback that wraps the given memory region. */
+BrotliOutput BrotliInitMemOutput(uint8_t* buffer, size_t length,
+                                 BrotliMemOutput* mem_output);
+
+/* Input callback that reads from standard input. */
+int BrotliStdinInputFunction(void* data, uint8_t* buf, size_t count);
+BrotliInput BrotliStdinInput();
+
+/* Output callback that writes to standard output. */
+int BrotliStdoutOutputFunction(void* data, const uint8_t* buf, size_t count);
+BrotliOutput BrotliStdoutOutput();
+
+/* Input callback that reads from a file. */
+int BrotliFileInputFunction(void* data, uint8_t* buf, size_t count);
+BrotliInput BrotliFileInput(FILE* f);
+
+/* Output callback that writes to a file. */
+int BrotliFileOutputFunction(void* data, const uint8_t* buf, size_t count);
+BrotliOutput BrotliFileOutput(FILE* f);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}    /* extern "C" */
+#endif
+
+#endif  /* BROTLI_DEC_STREAMS_H_ */