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Diffstat (limited to 'src/varicode.h')
| -rw-r--r-- | src/varicode.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/varicode.h b/src/varicode.h new file mode 100644 index 0000000..d9fb441 --- /dev/null +++ b/src/varicode.h @@ -0,0 +1,52 @@ +//========================================================================== +// Name: varicode.h +// Purpose: Varicode encoded and decode functions +// Created: Nov 24, 2012 +// Authors: David Rowe +// +// License: +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2.1, +// as published by the Free Software Foundation. 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 __VARICODE__ +#define __VARICODE__ + +#ifdef __cplusplus +extern "C" { + +#endif + +#define VARICODE_MAX_BITS (10+2) /* max varicode bits for each ascii character */ + /* 10 bits for code plus 2 0 bits for inter-character space */ + +struct VARICODE_DEC { + int state; + int n_zeros; + int v_len; + unsigned short packed; + int code_num; + int n_in; + int in[2]; +}; + +int varicode_encode(short varicode_out[], char ascii_in[], int max_out, int n_in, int code_num); +void varicode_decode_init(struct VARICODE_DEC *dec_states, int code_num); +int varicode_decode(struct VARICODE_DEC *dec_states, char ascii_out[], short varicode_in[], int max_out, int n_in); +void varicode_set_code_num(struct VARICODE_DEC *dec_states, int code_num); + +#ifdef __cplusplus +} +#endif + +#endif |