90517da9ca
LibSQL aims to be a SQLite clone for SerenityOS. Step 1 is creating a tokenizer to lex SQL tokens. This lexer is heavily influenced by the LibJS lexer.
73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2021, Tim Flynn <trflynn89@pm.me>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
|
|
*/
|
|
|
|
#include "Token.h"
|
|
#include <AK/Assertions.h>
|
|
#include <AK/String.h>
|
|
#include <stdlib.h>
|
|
|
|
namespace SQL {
|
|
|
|
StringView Token::name(TokenType type)
|
|
{
|
|
switch (type) {
|
|
#define __ENUMERATE_SQL_TOKEN(value, type, category) \
|
|
case TokenType::type: \
|
|
return #type;
|
|
ENUMERATE_SQL_TOKENS
|
|
#undef __ENUMERATE_SQL_TOKEN
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
}
|
|
|
|
TokenCategory Token::category(TokenType type)
|
|
{
|
|
switch (type) {
|
|
#define __ENUMERATE_SQL_TOKEN(value, type, category) \
|
|
case TokenType::type: \
|
|
return TokenCategory::category;
|
|
ENUMERATE_SQL_TOKENS
|
|
#undef __ENUMERATE_SQL_TOKEN
|
|
default:
|
|
VERIFY_NOT_REACHED();
|
|
}
|
|
}
|
|
|
|
double Token::double_value() const
|
|
{
|
|
VERIFY(type() == TokenType::NumericLiteral);
|
|
String value(m_value);
|
|
|
|
if (value[0] == '0' && value.length() >= 2) {
|
|
if (value[1] == 'x' || value[1] == 'X')
|
|
return static_cast<double>(strtoul(value.characters() + 2, nullptr, 16));
|
|
}
|
|
|
|
return strtod(value.characters(), nullptr);
|
|
}
|
|
|
|
}
|