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Diffstat (limited to 'brotli/dec/streams.h')
-rw-r--r-- | brotli/dec/streams.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/brotli/dec/streams.h b/brotli/dec/streams.h new file mode 100644 index 0000000..b055234 --- /dev/null +++ b/brotli/dec/streams.h @@ -0,0 +1,102 @@ +// 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(); + +// 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_ |