1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/**
* Copyright (c) 2013, Timothy Stack
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Timothy Stack nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @file column_namer.hh
*/
#ifndef lnav_column_namer_hh
#define lnav_column_namer_hh
#include <string>
#include <unordered_map>
#include <vector>
#include "ArenaAlloc/arenaalloc.h"
#include "base/intern_string.hh"
class column_namer {
public:
enum class language {
SQL,
JSON,
};
column_namer(language lang);
bool existing_name(const string_fragment& in_name) const;
string_fragment add_column(const string_fragment& in_name);
static const char BUILTIN_COL[];
ArenaAlloc::Alloc<char> cn_alloc;
language cn_language;
std::vector<string_fragment> cn_builtin_names{string_fragment(BUILTIN_COL)};
std::vector<string_fragment> cn_names;
std::unordered_map<
string_fragment,
size_t,
frag_hasher,
std::equal_to<string_fragment>,
ArenaAlloc::Alloc<std::pair<const string_fragment, size_t>>>
cn_name_counters;
};
#endif
|
