Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/cutil/bitvec.h @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /******************************************************************************
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2 ** Filename: bitvec.h
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3 ** Purpose: Routines for manipulating bit vectors
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4 ** Author: Dan Johnson
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5 **
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6 ** (c) Copyright Hewlett-Packard Company, 1988.
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7 ** Licensed under the Apache License, Version 2.0 (the "License");
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8 ** you may not use this file except in compliance with the License.
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9 ** You may obtain a copy of the License at
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10 ** http://www.apache.org/licenses/LICENSE-2.0
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11 ** Unless required by applicable law or agreed to in writing, software
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12 ** distributed under the License is distributed on an "AS IS" BASIS,
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13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 ** See the License for the specific language governing permissions and
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15 ** limitations under the License.
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16 ******************************************************************************/
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18 #ifndef BITVEC_H
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19 #define BITVEC_H
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21 #include <cstddef> // for size_t
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22 #include <cstdint> // for uint32_t
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24 /*-----------------------------------------------------------------------------
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25 Include Files and Type Defines
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26 -----------------------------------------------------------------------------*/
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28 using BIT_VECTOR = uint32_t *;
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30 //< no of bits in a BIT_VECTOR element
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31 const size_t BITSINLONG = 8 * sizeof(uint32_t);
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33 /*-----------------------------------------------------------------------------
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34 Public Function Prototypes
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35 -----------------------------------------------------------------------------*/
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37 static inline void zero_all_bits(BIT_VECTOR array, size_t length) {
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38 for (size_t index = 0; index < length; index++) {
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39 array[index] = 0;
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40 }
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41 }
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43 static inline void set_all_bits(BIT_VECTOR array, size_t length) {
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44 for (size_t index = 0; index < length; index++) {
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45 array[index] = ~0;
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46 }
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47 }
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49 static inline void copy_all_bits(BIT_VECTOR source, BIT_VECTOR dest, size_t length) {
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50 for (size_t index = 0; index < length; index++) {
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51 dest[index] = source[index];
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52 }
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53 }
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55 #define SET_BIT(array, bit) (array[bit / BITSINLONG] |= 1 << (bit & (BITSINLONG - 1)))
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57 #define reset_bit(array, bit) (array[bit / BITSINLONG] &= ~(1 << (bit & (BITSINLONG - 1))))
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59 #define test_bit(array, bit) (array[bit / BITSINLONG] & (1 << (bit & (BITSINLONG - 1))))
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61 static inline size_t WordsInVectorOfSize(size_t NumBits) {
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62 return (NumBits + BITSINLONG - 1) / BITSINLONG;
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63 }
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65 /**
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66 * This routine frees a bit vector.
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67 *
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68 * @param BitVector bit vector to be freed
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69 *
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70 */
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71 static inline void FreeBitVector(BIT_VECTOR BitVector) {
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72 delete[] BitVector;
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73 }
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75 /*---------------------------------------------------------------------------*/
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76 /**
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77 * Allocate and return a new bit vector large enough to
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78 * hold the specified number of bits.
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79 *
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80 * @param NumBits number of bits in new bit vector
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81 *
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82 * @return New bit vector.
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83 */
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84 static inline BIT_VECTOR NewBitVector(size_t NumBits) {
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85 return new uint32_t[WordsInVectorOfSize(NumBits)];
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86 }
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88 #endif