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