130625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Copyright 2013 Google Inc. All Rights Reserved. 230625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka 330625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka Licensed under the Apache License, Version 2.0 (the "License"); 430625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka you may not use this file except in compliance with the License. 530625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka You may obtain a copy of the License at 630625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka 730625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka http://www.apache.org/licenses/LICENSE-2.0 830625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka 930625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka Unless required by applicable law or agreed to in writing, software 1030625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka distributed under the License is distributed on an "AS IS" BASIS, 1130625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1230625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka See the License for the specific language governing permissions and 1330625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka limitations under the License. 1430625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka 1530625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka Functions for streaming input and output. 1630625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka*/ 171571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 181571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka#ifndef BROTLI_DEC_STREAMS_H_ 191571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka#define BROTLI_DEC_STREAMS_H_ 201571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 211571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka#include <stdio.h> 221571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka#include "./types.h" 231571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 241571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka#if defined(__cplusplus) || defined(c_plusplus) 251571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkaextern "C" { 261571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka#endif 271571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 2830625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Function pointer type used to read len bytes into buf. Returns the */ 2930625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* number of bytes read or -1 on error. */ 301571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkatypedef int (*BrotliInputFunction)(void* data, uint8_t* buf, size_t len); 311571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 3230625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Input callback function with associated data. */ 331571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkatypedef struct { 341571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka BrotliInputFunction cb_; 351571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka void* data_; 361571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka} BrotliInput; 371571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 3830625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Reads len bytes into buf, using the in callback. */ 391571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkastatic BROTLI_INLINE int BrotliRead(BrotliInput in, uint8_t* buf, size_t len) { 401571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka return in.cb_(in.data_, buf, len); 411571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka} 421571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 4330625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Function pointer type used to write len bytes into buf. Returns the */ 4430625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* number of bytes written or -1 on error. */ 451571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkatypedef int (*BrotliOutputFunction)(void* data, const uint8_t* buf, size_t len); 461571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 4730625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Output callback function with associated data. */ 481571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkatypedef struct { 491571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka BrotliOutputFunction cb_; 501571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka void* data_; 511571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka} BrotliOutput; 521571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 5330625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Writes len bytes into buf, using the out callback. */ 541571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkastatic BROTLI_INLINE int BrotliWrite(BrotliOutput out, 551571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka const uint8_t* buf, size_t len) { 561571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka return out.cb_(out.data_, buf, len); 571571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka} 581571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 5930625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Memory region with position. */ 601571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkatypedef struct { 611571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka const uint8_t* buffer; 621571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka size_t length; 631571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka size_t pos; 641571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka} BrotliMemInput; 651571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 6630625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Input callback where *data is a BrotliMemInput struct. */ 671571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkaint BrotliMemInputFunction(void* data, uint8_t* buf, size_t count); 681571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 6930625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Returns an input callback that wraps the given memory region. */ 701571db36a9b00e895882ee236e9f84d62f8ea226Zoltan SzabadkaBrotliInput BrotliInitMemInput(const uint8_t* buffer, size_t length, 711571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka BrotliMemInput* mem_input); 721571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 7330625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Output buffer with position. */ 741571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkatypedef struct { 751571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka uint8_t* buffer; 761571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka size_t length; 771571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka size_t pos; 781571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka} BrotliMemOutput; 791571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 8030625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Output callback where *data is a BrotliMemOutput struct. */ 811571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkaint BrotliMemOutputFunction(void* data, const uint8_t* buf, size_t count); 821571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 8330625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Returns an output callback that wraps the given memory region. */ 841571db36a9b00e895882ee236e9f84d62f8ea226Zoltan SzabadkaBrotliOutput BrotliInitMemOutput(uint8_t* buffer, size_t length, 851571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka BrotliMemOutput* mem_output); 861571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 8730625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Input callback that reads from standard input. */ 881571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkaint BrotliStdinInputFunction(void* data, uint8_t* buf, size_t count); 891571db36a9b00e895882ee236e9f84d62f8ea226Zoltan SzabadkaBrotliInput BrotliStdinInput(); 901571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 9130625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Output callback that writes to standard output. */ 921571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkaint BrotliStdoutOutputFunction(void* data, const uint8_t* buf, size_t count); 931571db36a9b00e895882ee236e9f84d62f8ea226Zoltan SzabadkaBrotliOutput BrotliStdoutOutput(); 941571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 9530625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka/* Output callback that writes to a file. */ 961571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadkaint BrotliFileOutputFunction(void* data, const uint8_t* buf, size_t count); 971571db36a9b00e895882ee236e9f84d62f8ea226Zoltan SzabadkaBrotliOutput BrotliFileOutput(FILE* f); 981571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 991571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka#if defined(__cplusplus) || defined(c_plusplus) 10030625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka} /* extern "C" */ 1011571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka#endif 1021571db36a9b00e895882ee236e9f84d62f8ea226Zoltan Szabadka 10330625ba238fcb360c80a093164347503bbedf7adZoltan Szabadka#endif /* BROTLI_DEC_STREAMS_H_ */ 104