1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "js_blob.h"
17 #include "securec.h"
18 using namespace std;
19
20 namespace OHOS::buffer {
Init(uint8_t * blob,unsigned int length)21 void Blob::Init(uint8_t *blob, unsigned int length)
22 {
23 if (blob != nullptr) {
24 this->raw_ = reinterpret_cast<uint8_t *>(malloc(length));
25 if (raw_ == nullptr) {
26 HILOG_FATAL("Blob:: constructor malloc failed");
27 } else {
28 this->length_ = length;
29 if (memcpy_s(raw_, length, blob, length) != EOK) {
30 HILOG_FATAL("Blob:: constructor(length) memcpy_s failed");
31 }
32 }
33 }
34 }
35
Init(Blob * blob,int start)36 void Blob::Init(Blob *blob, int start)
37 {
38 if (blob != nullptr && blob->length_ > 0) {
39 this->raw_ = reinterpret_cast<uint8_t *>(malloc(blob->length_));
40 if (raw_ == nullptr) {
41 HILOG_FATAL("Blob:: constructor malloc failed");
42 } else {
43 if (start < 0) {
44 HILOG_ERROR("Blob:: start position error");
45 return;
46 }
47 unsigned int uStart = static_cast<unsigned int>(start);
48 if (uStart >= blob->length_) {
49 HILOG_ERROR("Blob:: start position error");
50 return;
51 }
52 if ((blob->raw_ + start) == nullptr) {
53 HILOG_FATAL("Blob:: constructor(start) memcpy_s failed");
54 return;
55 }
56 this->length_ = blob->length_;
57 if (memcpy_s(raw_, blob->length_ - start, blob->raw_ + start, blob->length_ - start) != EOK) {
58 HILOG_FATAL("Blob:: constructor(start) memcpy_s failed");
59 }
60 }
61 }
62 }
63
Init(Blob * blob,int start,int end)64 void Blob::Init(Blob *blob, int start, int end)
65 {
66 if (start > end) {
67 return;
68 }
69 if ((start > 0 && end < 0) || (start < 0 && end > 0)) {
70 return;
71 }
72 if (blob == nullptr) {
73 return;
74 }
75 unsigned int length = static_cast<unsigned int>(end - start);
76 length = blob->length_ > length ? length : blob->length_;
77 this->raw_ = reinterpret_cast<uint8_t *>(malloc(length));
78 if (raw_ == nullptr) {
79 HILOG_FATAL("Blob:: constructor malloc failed");
80 } else {
81 this->length_ = length;
82 if (start >= 0) {
83 if ((blob->raw_ + start) == nullptr) {
84 HILOG_FATAL("Blob:: constructor(start >= 0, end) memcpy_s failed");
85 return;
86 }
87 if (memcpy_s(this->raw_, length, blob->raw_ + start, length) != EOK) {
88 HILOG_FATAL("Blob:: constructor(start >= 0, end) memcpy_s failed");
89 }
90 } else {
91 if ((blob->raw_ + blob->length_ + start) == nullptr) {
92 HILOG_FATAL("Blob:: constructor(start, end) memcpy_s failed");
93 return;
94 }
95 if (memcpy_s(raw_, length, blob->raw_ + blob->length_ + start, length) != EOK) {
96 HILOG_FATAL("Blob:: constructor(start, end) memcpy_s failed");
97 }
98 }
99 }
100 }
101
~Blob()102 Blob::~Blob()
103 {
104 if (raw_ != nullptr) {
105 free(raw_);
106 raw_ = nullptr;
107 }
108 }
109
GetByte(int index)110 uint8_t Blob::GetByte(int index)
111 {
112 return *(this->raw_ + index);
113 }
114
GetRaw()115 uint8_t *Blob::GetRaw()
116 {
117 return this->raw_;
118 }
119
GetLength()120 unsigned int Blob::GetLength()
121 {
122 return this->length_;
123 }
124
ReadBytes(uint8_t * data,int length)125 void Blob::ReadBytes(uint8_t *data, int length)
126 {
127 if (raw_ == nullptr) {
128 HILOG_FATAL("Blob:: raw_ is nullptr");
129 return;
130 }
131 if (memcpy_s(data, length, raw_, length) != EOK) {
132 HILOG_FATAL("Blob:: read bytes from blob error");
133 }
134 }
135 } // namespace OHOS::buffer