87 lines
2.8 KiB
C
87 lines
2.8 KiB
C
/*
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* Basic implementation of LZ78 compression algorithm
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*
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* Copyright (C) 2010 evilaliv3 <giovanni.pellerano@evilaliv3.org>
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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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*/
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#ifndef __WRAPPER_H
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#define __WRAPPER_H
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#include "lz78.h"
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/* List of included compression algorithms */
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#define UNKNOWN_ALGORITHM 0
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#define LZ78_ALGORITHM 1
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/* Modes of compression */
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#define WRAPPER_MODE_COMPRESS 0
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#define WRAPPER_MODE_DECOMPRESS 1
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/* List of managed wrapper-level errors */
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#define WRAPPER_SUCCESS 20
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#define WRAPPER_ERROR_ALGORITHM 21
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#define WRAPPER_ERROR_FILE_IN 22
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#define WRAPPER_ERROR_FILE_OUT 23
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#define WRAPPER_ERROR_READ 24
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#define WRAPPER_ERROR_WRITE 25
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#define WRAPPER_ERROR_EAGAIN 26
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#define WRAPPER_ERROR_COMPRESS 27
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#define WRAPPER_ERROR_DECOMPRESS 28
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#define WRAPPER_ERROR_GENERIC 29
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/* Opaque type representing the wrapper */
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typedef struct __wrapper wrapper;
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/* Creates a new wrapper:
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w_mode mode of compression
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w_type type of algorithm
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w_argv additional parameter
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*/
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wrapper* wrapper_new(uint8_t w_mode, uint8_t w_type, char* w_argv);
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/* Deallocates a wrapper */
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void wrapper_destroy(wrapper* w);
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/* Execute the function associated with the wrapper (compress/decompress)
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Return:
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WRAPPER_SUCCESS on success
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WRAPPER_ERROR_FILE_IN unable to open input file
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WRAPPER_ERROR_FILE_OUT unable to open output file
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WRAPPER_ERROR_READ unable to read input data
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WRAPPER_ERROR_WRITE unable to write output data
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WRAPPER_ERROR_EAGAIN unable to accomplish current operation
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WRAPPER_ERROR_ALGORITHM type of wrapper unknown
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WRAPPER_ERROR_COMPRESS unable to compress input data
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WRAPPER_ERROR_DECOMPRESS unable to decompress input data
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WRAPPER_ERROR_GENERIC algorithm-dependent error
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*/
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uint8_t wrapper_exec(wrapper* w, char* in, char* out);
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/* Return a positive constant associated to a particular algorithm
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(UNKNOWN_ALGORITHM if doesn't exist)
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*/
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uint8_t get_algorithm(char* type);
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/* Return an integer representing the given size
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(K = KBytes, M = MBytes)
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*/
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int byte_size(char* size);
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/* Print last wrapper error occurred into standard error stream */
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void wrapper_perror();
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#endif /* __WRAPPER_H */
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