• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Copyright 2018 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "iterator.h"
18 
19 #include <base/logging.h>
20 
21 #include "check.h"
22 #include "packet.h"
23 
24 namespace bluetooth {
25 
Iterator(std::shared_ptr<const Packet> packet,size_t i)26 Iterator::Iterator(std::shared_ptr<const Packet> packet, size_t i) {
27   packet_ = packet;
28   index_ = i;
29 
30   CHECK_GE(index_, packet->packet_start_index_);
31   CHECK_LE(index_, packet->packet_end_index_);
32 }
33 
Iterator(const Iterator & itr)34 Iterator::Iterator(const Iterator& itr) { *this = itr; }
35 
operator +(size_t offset)36 Iterator Iterator::operator+(size_t offset) {
37   auto itr(*this);
38 
39   return itr += offset;
40 }
41 
operator +=(size_t offset)42 Iterator& Iterator::operator+=(size_t offset) {
43   size_t new_offset = index_ + offset;
44   index_ = new_offset > packet_->packet_end_index_ ? packet_->packet_end_index_
45                                                    : new_offset;
46   return *this;
47 }
48 
operator ++(int)49 Iterator Iterator::operator++(int) {
50   auto itr(*this);
51   index_++;
52 
53   if (index_ > packet_->packet_end_index_) index_ = packet_->packet_end_index_;
54 
55   return itr;
56 }
57 
operator ++()58 Iterator& Iterator::operator++() {
59   index_++;
60 
61   if (index_ > packet_->packet_end_index_) index_ = packet_->packet_end_index_;
62 
63   return *this;
64 }
65 
operator -(size_t offset)66 Iterator Iterator::operator-(size_t offset) {
67   auto itr(*this);
68 
69   return itr -= offset;
70 }
71 
operator -(const Iterator & itr)72 int Iterator::operator-(const Iterator& itr) { return index_ - itr.index_; }
73 
operator -=(size_t offset)74 Iterator& Iterator::operator-=(size_t offset) {
75   index_ = (index_ < offset || index_ - offset < packet_->packet_start_index_)
76                ? packet_->packet_start_index_
77                : index_ - offset;
78 
79   return *this;
80 }
81 
operator --(int)82 Iterator Iterator::operator--(int) {
83   auto itr(*this);
84   if (index_ != packet_->packet_start_index_) index_--;
85 
86   return itr;
87 }
88 
operator --()89 Iterator& Iterator::operator--() {
90   if (index_ != packet_->packet_start_index_) index_--;
91 
92   return *this;
93 }
94 
operator =(const Iterator & itr)95 Iterator& Iterator::operator=(const Iterator& itr) {
96   packet_ = itr.packet_;
97   index_ = itr.index_;
98 
99   return *this;
100 }
101 
operator ==(const Iterator & itr) const102 bool Iterator::operator==(const Iterator& itr) const {
103   return ((packet_ == itr.packet_) && (index_ == itr.index_));
104 }
105 
operator !=(const Iterator & itr) const106 bool Iterator::operator!=(const Iterator& itr) const { return !(*this == itr); }
107 
operator <(const Iterator & itr) const108 bool Iterator::operator<(const Iterator& itr) const {
109   return ((packet_ == itr.packet_) && (index_ < itr.index_));
110 }
111 
operator >(const Iterator & itr) const112 bool Iterator::operator>(const Iterator& itr) const {
113   return ((packet_ == itr.packet_) && (index_ > itr.index_));
114 }
115 
operator <=(const Iterator & itr) const116 bool Iterator::operator<=(const Iterator& itr) const {
117   return ((packet_ == itr.packet_) && (index_ <= itr.index_));
118 }
119 
operator >=(const Iterator & itr) const120 bool Iterator::operator>=(const Iterator& itr) const {
121   return ((packet_ == itr.packet_) && (index_ >= itr.index_));
122 }
123 
operator *() const124 uint8_t Iterator::operator*() const {
125   CHECK_NE(index_, packet_->packet_end_index_);
126 
127   return packet_->get_at_index(index_);
128 }
129 
130 }  // namespace bluetooth