1/*
2 * Copyright (c) Huawei Technologies Co., Ltd. 2021. All rights reserved.
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#ifndef BUFFER_SPLITTER_H
17#define BUFFER_SPLITTER_H
18
19#include <string>
20
21/**
22 * Description: Buffer Splitter Class
23 * The BufferSplitter class object splits the buffer content by moving the pointer
24 * Except for the last character, other buffer contents are not modified during the segmentation
25 */
26
27class BufferSplitter {
28public:
29    /* During construction, buf[size-1] will be forcibly modified to '\ 0'
30       The constructor will automatically call the NextLine to initialize the first line of data */
31    BufferSplitter(const char* buf, int size);
32
33    ~BufferSplitter() {}
34    /* Find and update the next line header pointer, and line length. Length does not include '\ n' and '\ 0' */
35    bool NextLine();
36
37    /* Find and update the NextWord's head pointer and Word length according to the delimiter within the
38       current line range. The length calculation does not include the 'delimiter' */
39    /* When the current line cannot find a specific 'delimiter', it can
40        be split from the current position according to the new 'delimiter' */
41    bool NextWord(char delimiter);
42
43    const char* CurWord()
44    {
45        return curWord_;
46    }
47    size_t CurWordSize() const
48    {
49        return curWordSize_;
50    }
51    char* CurLine()
52    {
53        return curLine_;
54    }
55    size_t CurLineSize() const
56    {
57        return curLineSize_;
58    }
59
60private:
61    char* curWord_ = nullptr;
62    size_t curWordSize_ = 0;
63    char* next_;
64    char* curLine_ = nullptr;
65    size_t curLineSize_ = 0;
66    char* nextLine_;
67    char* end_;
68};
69#endif
70