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109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/* libanode: the Anode C reference implementation
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* Copyright (C) 2009 Adam Ierymenko <adam.ierymenko@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef _SPARK_STREAMENCODER_H
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#define _SPARK_STREAMENCODER_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct
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{
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unsigned char *input_buf;
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unsigned long input_buf_capacity;
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unsigned long input_length;
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unsigned char *stream_out_buf;
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unsigned long stream_out_buf_capacity;
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unsigned long stream_out_length;
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void (*data_segment_add_func)(const void *data,unsigned long len,const void *global_hash,unsigned long global_hash_len);
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} SparkStreamEncoder;
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/**
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* Initialize a spark stream encoder
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*
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* @param enc Encoder structure to initialize
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* @param data_segment_add_func Function to call to store or cache data
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*/
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void SparkStreamEncoder_init(
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SparkStreamEncoder *enc,
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void (*data_segment_add_func)(
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const void *data,
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unsigned long len,
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const void *global_hash,
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unsigned long global_hash_len));
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/**
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* Clean up a spark stream encoder structure
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*
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* @param enc Structure to clear
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*/
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void SparkStreamEncoder_destroy(SparkStreamEncoder *enc);
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/**
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* Add data to encode
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*
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* @param enc Encoder structure
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* @param data Data to encode
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* @param len Length of data in bytes
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* @return Number of bytes of result stream now available
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*/
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unsigned long SparkStreamEncoder_put(
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SparkStreamEncoder *enc,
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const void *data,
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unsigned long len);
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/**
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* Flush all data currently in input buffer
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*
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* @param enc Encoder structure to flush
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*/
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void SparkStreamEncoder_flush(SparkStreamEncoder *enc);
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/**
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* @return Number of bytes of output stream available
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*/
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static inline unsigned long SparkStreamEncoder_available(SparkStreamEncoder *enc)
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{
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return enc->stream_out_length;
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}
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/**
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* @return Pointer to result stream bytes (may return null if none available)
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*/
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static inline const void *SparkStreamEncoder_get(SparkStreamEncoder *enc)
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{
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return (const void *)(enc->stream_out_buf);
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}
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/**
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* @return "Consume" result stream bytes after they're read or sent
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*/
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static inline void SparkStreamEncoder_consume(SparkStreamEncoder *enc,unsigned long len)
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{
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unsigned long i;
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for(i=len;i<enc->stream_out_length;++i)
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enc->stream_out_buf[i - len] = enc->stream_out_buf[i];
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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