53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
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//==========================================================================
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// Name: varicode.h
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// Purpose: Varicode encoded and decode functions
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// Created: Nov 24, 2012
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// Authors: David Rowe
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//
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// License:
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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 version 2.1,
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// as published by the Free Software Foundation. This program is
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// distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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// 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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//==========================================================================
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#ifndef __VARICODE__
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#define __VARICODE__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define VARICODE_MAX_BITS (10+2) /* max varicode bits for each ascii character */
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/* 10 bits for code plus 2 0 bits for inter-character space */
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struct VARICODE_DEC {
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int state;
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int n_zeros;
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int v_len;
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unsigned short packed;
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int code_num;
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int n_in;
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int in[2];
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};
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int varicode_encode(short varicode_out[], char ascii_in[], int max_out, int n_in, int code_num);
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void varicode_decode_init(struct VARICODE_DEC *dec_states, int code_num);
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int varicode_decode(struct VARICODE_DEC *dec_states, char ascii_out[], short varicode_in[], int max_out, int n_in);
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void varicode_set_code_num(struct VARICODE_DEC *dec_states, int code_num);
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#ifdef __cplusplus
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}
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#endif
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#endif
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