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71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/**
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* Copyright (c) 2013, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @file column_namer.hh
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*/
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#ifndef lnav_column_namer_hh
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#define lnav_column_namer_hh
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include "ArenaAlloc/arenaalloc.h"
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#include "base/intern_string.hh"
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class column_namer {
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public:
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enum class language {
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SQL,
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JSON,
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};
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column_namer(language lang);
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bool existing_name(const string_fragment& in_name) const;
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string_fragment add_column(const string_fragment& in_name);
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static const char BUILTIN_COL[];
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ArenaAlloc::Alloc<char> cn_alloc;
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language cn_language;
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std::vector<string_fragment> cn_builtin_names{string_fragment(BUILTIN_COL)};
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std::vector<string_fragment> cn_names;
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std::unordered_map<
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string_fragment,
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size_t,
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frag_hasher,
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std::equal_to<string_fragment>,
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ArenaAlloc::Alloc<std::pair<const string_fragment, size_t>>>
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cn_name_counters;
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};
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#endif
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