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108 lines
2.9 KiB
108 lines
2.9 KiB
/* 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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