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linear-packed-z.cpp
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linear-packed-z.cpp
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// Copyright (C) 2020 Matthew "strager" Glazar
// See end of file for extended copyright information.
#include "token.h"
#include <cstddef>
#include <cstring>
#include <vector>
namespace pht {
namespace {
constexpr std::size_t min_keyword_size = 2;
constexpr std::size_t max_keyword_size = 11;
struct table_entry {
char keyword[max_keyword_size + 1];
token_type type;
bool matches(const char* identifier, std::size_t size) const noexcept {
for (std::size_t i = 0; i < size; ++i) {
if (identifier[i] != this->keyword[i] || identifier[i] == '\0') {
return false;
}
}
return this->keyword[size] == '\0';
}
};
std::vector<table_entry> make_keyword_table() {
std::vector<table_entry> result;
result.reserve(std::size(keyword_tokens));
for (keyword_token kt : keyword_tokens) {
table_entry entry;
std::memcpy(entry.keyword, kt.keyword.data(), kt.keyword.size());
entry.keyword[kt.keyword.size()] = '\0';
entry.type = kt.type;
result.push_back(entry);
}
return result;
}
}
std::vector<table_entry> keywords = make_keyword_table();
extern "C"
token_type look_up_identifier(const char* identifier, std::size_t size) noexcept {
if (size < min_keyword_size || size > max_keyword_size) {
return token_type::identifier;
}
for (const table_entry& entry : keywords) {
if (entry.matches(identifier, size)) {
return entry.type;
}
}
return token_type::identifier;
}
}
// quick-lint-js finds bugs in JavaScript programs.
// Copyright (C) 2020 Matthew "strager" Glazar
//
// This file is part of quick-lint-js.
//
// quick-lint-js is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// quick-lint-js is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with quick-lint-js. If not, see <https://www.gnu.org/licenses/>.