mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 21:27:35 +00:00
LibSQL: Introduce a SQL library with a tokenizer
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.
This commit is contained in:
parent
55b7b8e930
commit
90517da9ca
6 changed files with 716 additions and 0 deletions
73
Userland/Libraries/LibSQL/Token.cpp
Normal file
73
Userland/Libraries/LibSQL/Token.cpp
Normal file
|
@ -0,0 +1,73 @@
|
|||
/*
|
||||
* 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);
|
||||
}
|
||||
|
||||
}
|
Loading…
Add table
Add a link
Reference in a new issue