BC_CommonBitArray.cpp revision 4d3acf4ec42bf6e838f9060103aff98fbf170794 
1// Copyright 2014 PDFium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
6// Original code is licensed as follows:
7/*
8 * Copyright 2007 ZXing authors
9 *
10 * Licensed under the Apache License, Version 2.0 (the "License");
11 * you may not use this file except in compliance with the License.
12 * You may obtain a copy of the License at
13 *
14 *      http://www.apache.org/licenses/LICENSE-2.0
15 *
16 * Unless required by applicable law or agreed to in writing, software
17 * distributed under the License is distributed on an "AS IS" BASIS,
18 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
19 * See the License for the specific language governing permissions and
20 * limitations under the License.
21 */
22
23#include "xfa/fxbarcode/common/BC_CommonBitArray.h"
24#include "xfa/fxbarcode/utils.h"
25
26CBC_CommonBitArray::CBC_CommonBitArray(CBC_CommonBitArray* array) {
27  m_size = array->GetSize();
28  m_bits.Copy(array->GetBits());
29}
30CBC_CommonBitArray::CBC_CommonBitArray() {
31  m_bits.SetSize(1);
32  m_size = 0;
33}
34CBC_CommonBitArray::CBC_CommonBitArray(int32_t size) {
35  m_bits.SetSize((size + 31) >> 5);
36  m_size = size;
37}
38CBC_CommonBitArray::~CBC_CommonBitArray() {
39  m_size = 0;
40}
41int32_t CBC_CommonBitArray::GetSize() {
42  return m_size;
43}
44CFX_Int32Array& CBC_CommonBitArray::GetBits() {
45  return m_bits;
46}
47int32_t CBC_CommonBitArray::GetSizeInBytes() {
48  return (m_size + 7) >> 3;
49}
50bool CBC_CommonBitArray::Get(int32_t i) {
51  return (m_bits[i >> 5] & (1 << (i & 0x1f))) != 0;
52}
53void CBC_CommonBitArray::Set(int32_t i) {
54  m_bits[i >> 5] |= 1 << (i & 0x1F);
55}
56void CBC_CommonBitArray::Flip(int32_t i) {
57  m_bits[i >> 5] ^= 1 << (i & 0x1F);
58}
59void CBC_CommonBitArray::SetBulk(int32_t i, int32_t newBits) {
60  m_bits[i >> 5] = newBits;
61}
62void CBC_CommonBitArray::Clear() {
63  FXSYS_memset(&m_bits[0], 0x00, m_bits.GetSize() * sizeof(int32_t));
64}
65bool CBC_CommonBitArray::IsRange(int32_t start,
66                                 int32_t end,
67                                 bool value,
68                                 int32_t& e) {
69  if (end < start) {
70    e = BCExceptionEndLessThanStart;
71    return false;
72  }
73  if (end == start) {
74    return true;
75  }
76  end--;
77  int32_t firstInt = start >> 5;
78  int32_t lastInt = end >> 5;
79  int32_t i;
80  for (i = firstInt; i <= lastInt; i++) {
81    int32_t firstBit = i > firstInt ? 0 : start & 0x1F;
82    int32_t lastBit = i < lastInt ? 31 : end & 0x1F;
83    int32_t mask;
84    if (firstBit == 0 && lastBit == 31) {
85      mask = -1;
86    } else {
87      mask = 0;
88      for (int32_t j = firstBit; j <= lastBit; j++) {
89        mask |= 1 << j;
90      }
91    }
92    if ((m_bits[i] & mask) != (value ? mask : 0)) {
93      return false;
94    }
95  }
96  return true;
97}
98int32_t* CBC_CommonBitArray::GetBitArray() {
99  return &m_bits[0];
100}
101void CBC_CommonBitArray::Reverse() {
102  int32_t* newBits = FX_Alloc(int32_t, m_bits.GetSize());
103  FXSYS_memset(newBits, 0x00, m_bits.GetSize() * sizeof(int32_t));
104  int32_t size = m_size;
105  int32_t i;
106  for (i = 0; i < size; i++) {
107    if (Get(size - i - 1)) {
108      newBits[i >> 5] |= 1 << (i & 0x1F);
109    }
110  }
111  FXSYS_memcpy(&m_bits[0], newBits, m_bits.GetSize() * sizeof(int32_t));
112  FX_Free(newBits);
113}
114