the begginning

dbcon/ddlpackage/sqlparser.cpp

@@ -0,0 +1,135 @@
+/* Copyright (C) 2014 InfiniDB, Inc.
+
+   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 Street, Fifth Floor, Boston,
+   MA 02110-1301, USA. */
+
+/***********************************************************************
+*   $Id: sqlparser.cpp 9210 2013-01-21 14:10:42Z rdempsey $
+*
+*
+***********************************************************************/
+
+#include <fstream>
+#include <errno.h>
+
+#define DDLPKGSQLPARSER_DLLEXPORT
+#include "sqlparser.h"
+#undef DDLPKGSQLPARSER_DLLEXPORT
+
+#ifdef _MSC_VER
+#include "ddl-gram-win.h"
+#else
+#include "ddl-gram.h"
+#endif
+
+void scanner_finish(void);
+void scanner_init(const char *str);
+void grammar_init(ddlpackage::ParseTree *ptree, bool);
+void set_schema(std::string schema);
+int ddlparse();
+
+namespace ddlpackage {
+	using namespace std;
+
+	SqlParser::SqlParser() :
+		fStatus(-1),
+		fDebug(false)
+	{
+	}
+
+
+	void SqlParser::SetDebug(bool debug)
+	{
+		fDebug = debug;
+	}
+
+	void SqlParser::setDefaultSchema(std::string schema)
+    {
+		set_schema(schema);
+	}
+
+	int SqlParser::Parse(const char* sqltext)
+	{
+		scanner_init(sqltext);
+		grammar_init(&fParseTree, fDebug);
+		fStatus = ddlparse();
+		return fStatus;
+	}
+	
+
+	const ParseTree& SqlParser::GetParseTree(void)
+	{
+		if(!Good()) {
+			throw logic_error("The ParseTree is invalid");
+		}
+		return fParseTree;
+	}
+
+
+	bool SqlParser::Good()
+	{
+		return fStatus == 0;
+	}
+
+
+	SqlParser::~SqlParser()
+	{
+		scanner_finish(); // free scanner allocated memory
+	}
+
+
+	SqlFileParser::SqlFileParser() :
+		SqlParser()
+	{
+	}
+	
+
+	int SqlFileParser::Parse(const string& sqlfile)
+	{
+		fStatus = -1;
+		
+int ddlparse();
+		ifstream ifsql;
+		ifsql.open(sqlfile.c_str());
+		if(!ifsql.is_open()) {
+			perror(sqlfile.c_str());
+			return fStatus;
+		}
+
+		char sqlbuf[1024*1024];
+		unsigned length;
+		ifsql.seekg (0, ios::end);
+		length = ifsql.tellg();
+		ifsql.seekg (0, ios::beg);
+
+		if(length > sizeof(sqlbuf) - 1) {
+			throw length_error("SqlFileParser has file size hard limit of 16K.");
+		}
+
+		unsigned rcount;
+		rcount = ifsql.readsome(sqlbuf, sizeof(sqlbuf) - 1);
+
+		if(rcount < 0)
+			return fStatus;
+
+		sqlbuf[rcount] = 0;
+
+		//cout << endl << sqlfile << "(" << rcount << ")" << endl;
+		//cout << "----------------------" << endl;
+		//cout << sqlbuf << endl;
+
+		return SqlParser::Parse(sqlbuf);
+	}
+}