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/*
* Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved.
*
* This program 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; version 2 of the
* License.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include <string>
#include <set>
#include <antlr3.h>
#include "base/log.h"
#include "base/string_utilities.h"
#include "MySQLLexer.h"
#include "mysql-scanner.h"
DEFAULT_LOG_DOMAIN("MySQL parsing")
extern "C" {
/**
* Error report function placeholder.
*/
void lexer_error(struct ANTLR3_BASE_lexer_struct *lexer, pANTLR3_UINT8 *tokenNames)
{
}
} // extern "C"
//----------------- MySQLScanner -------------------------------------------------------------------
class MySQLScanner::Private
{
public:
const char *_text;
size_t _text_length;
int _input_encoding;
RecognitionContext _context;
pANTLR3_INPUT_STREAM _input;
pMySQLLexer _lexer;
pANTLR3_TOKEN_SOURCE _token_source;
};
MySQLScanner::MySQLScanner(const char *text, size_t length, bool is_utf8, long server_version,
const std::string &sql_mode_string, const std::set<std::string> &charsets)
: MySQLRecognitionBase(charsets)
{
d = new Private();
d->_text = text;
d->_text_length = length;
d->_context.version = server_version;
d->_context.payload = this;
set_sql_mode(sql_mode_string);
// If the text is not using utf-8 (which it should) then we interpret as 8bit encoding
// (everything requiring only one byte per char as Latin1, ASCII and similar).
d->_input_encoding = is_utf8 ? ANTLR3_ENC_UTF8 : ANTLR3_ENC_8BIT;
setup();
}
//--------------------------------------------------------------------------------------------------
MySQLScanner::~MySQLScanner()
{
d->_lexer->free(d->_lexer);
d->_input->close(d->_input);
delete d;
}
//--------------------------------------------------------------------------------------------------
void MySQLScanner::reset()
{
d->_lexer->reset(d->_lexer);
}
//--------------------------------------------------------------------------------------------------
MySQLToken MySQLScanner::next_token()
{
pANTLR3_COMMON_TOKEN token = d->_token_source->nextToken(d->_token_source);
MySQLToken result;
if (token != NULL)
{
result.type = token->type;
result.line = token->line;
result.position = token->charPosition;
result.index = token->index;
result.channel = token->channel;
result.line_start = (char*)token->lineStart;
result.start = reinterpret_cast<char*>(token->start);
result.stop = reinterpret_cast<char*>(token->stop);
pANTLR3_STRING text = token->getText(token);
result.text = (const char*)text->chars;
}
return result;
}
//--------------------------------------------------------------------------------------------------
void MySQLScanner::setup()
{
log_debug2("Lexer setup\n");
d->_input = antlr3StringStreamNew((pANTLR3_UINT8)d->_text, d->_input_encoding, (ANTLR3_UINT32)d->_text_length,
(pANTLR3_UINT8)"mysql-script");
d->_input->setUcaseLA(d->_input, ANTLR3_TRUE); // Make input case-insensitive. String literals must all be upper case in the grammar!
d->_lexer = MySQLLexerNew(d->_input);
d->_lexer->pLexer->rec->state->userp = &d->_context;
d->_token_source = TOKENSOURCE(d->_lexer);
log_debug2("Lexer setup ended\n");
}
//--------------------------------------------------------------------------------------------------
const char* MySQLScanner::text()
{
return d->_text;
}
//--------------------------------------------------------------------------------------------------
void MySQLScanner::set_server_version(long version)
{
d->_context.version = version;
}
//--------------------------------------------------------------------------------------------------
void MySQLScanner::set_sql_mode(const std::string &new_mode)
{
MySQLRecognitionBase::set_sql_mode(new_mode);
d->_context.sql_mode = sql_mode(); // Parsed SQL mode.
}
//--------------------------------------------------------------------------------------------------
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