1 | /**************************************************************************
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2 | *
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3 | * bitio_gen.h -- General supoport routines for bitio
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4 | * Copyright (C) 1994 Neil Sharman and Alistair Moffat
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5 | *
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6 | * This program is free software; you can redistribute it and/or modify
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7 | * it under the terms of the GNU General Public License as published by
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8 | * the Free Software Foundation; either version 2 of the License, or
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9 | * (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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19 | *
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20 | * $Id: bitio_gen.h 3745 2003-02-20 21:20:24Z mdewsnip $
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21 | *
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22 | **************************************************************************
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23 | *
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24 | * This file contains function definitions for doing general bitio operations.
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25 | *
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26 | * This file defines functions for calculation the length in bits of a number
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27 | * coded unary, binary, delta, gamma, elias, and bblock coding. It defines
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28 | * routines for calculating the parameter and bounds for bblock coding.
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29 | * Routines for calculating ceil and floor lg are also defined.
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30 | *
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31 | *
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32 | **************************************************************************/
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33 |
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34 | #ifndef H_BITIO_GEN
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35 | #define H_BITIO_GEN
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36 |
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37 | unsigned long BIO_Unary_Length (unsigned long val);
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38 |
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39 | unsigned long BIO_Binary_Length (unsigned long val, unsigned long b);
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40 |
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41 | unsigned long BIO_Gamma_Length (unsigned long val);
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42 |
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43 | unsigned long BIO_Delta_Length (unsigned long val);
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44 |
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45 | unsigned long BIO_Elias_Length (unsigned long val, unsigned long b, double s);
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46 |
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47 | unsigned long BIO_Bblock_Length (unsigned long val, unsigned long b);
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48 |
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49 | int BIO_Bblock_Init (int N, int p);
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50 |
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51 | int BIO_Bblock_Init_W (int N, int p);
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52 |
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53 | int BIO_Bblock_Bound_b (int N, int p, int b);
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54 |
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55 | int BIO_Bblock_Bound (int N, int p);
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56 |
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57 | int BIO_Gamma_Bound (int N, int p);
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58 |
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59 | int floorlog_2 (int b);
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60 |
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61 | int ceillog_2 (int b);
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62 |
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63 | #endif
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