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Update Parserv2.cpp

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This commit is contained in:
scho4077 2015-09-22 21:49:37 -05:00
parent 11299fd6c5
commit 52c801715c
1 changed files with 31 additions and 128 deletions
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159
Parserv2.cpp
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@ -20,23 +20,6 @@ tring;
} }
// void par_select(vector<string> input)
// {
// // if (input[0] != "(")
// // {
// // cout<<"ERROR! missing parenthesis"<<endl;
// // }
// // else
// // {
// // input.erase(input.begin());
// // }
// cout<<"par_select function was called!"<<endl;
// }
void displayTokenList(vector<string> input) void displayTokenList(vector<string> input)
{ {
cout<<"TokenList: "<<endl; cout<<"TokenList: "<<endl;
@ -102,8 +85,8 @@ vector<string> showCMD(vector<string> input)
} }
cout<<"\nPassing the following arguments to dbEngine: "<<endl; cout<<"\nPassing the following arguments to dbEngine: "<<endl;
cout<<"command :"<<input[0]<<endl; cout << "command :" << input[0] << endl;
cout<<"argument: "<<input[1]<<endl; cout << "relation name / expression: "<< input[1] << endl;
return input; return input;
} }
@ -113,131 +96,51 @@ vector<string> exitCMD(vector<string> input)
if (input[1] != ";") if (input[1] != ";")
{ {
cout<<"ERROR: missing semicolon!"<<endl; cout<<"ERROR: missing semicolon!"<<endl;
return input;
} }
if (input[0] != "EXIT") { cout<<"Wrong function/syntax error!"<<endl;} if (input[0] != "EXIT") {
cout<<"Passing command: "<<input[0]<<endl; cout<<"Wrong function/syntax error!"<<endl;
return input;
}
cout<<"Passing command: "<< input[0] <<endl;
return input; return input;
} }
vector<string> createCMD(vector<string> input) vector<string> createCMD(vector<string> input)
{ {
// //relation name will be the first element of the vector of data returned by this function if (input[0] != "CREATE") {
// vector<string> output; cout << "Error, create keyword is missing." <<endl;
return input;
// output.push_back(input[0]) //pushing relation name }
// if (input[0] == "VALUES" && input[1] == "FROM")
// {
// input.erase(input.begin());
// input.erase(input.begin());
// if(input[0] == "(")
// {
// input.erase(input.begin());
// while(input[0] != ")") //inserting all values to relation
// //for (int i = 0; i < 2; ++i)
// {
// if (input[0] == ",") input.erase(input.begin());
// output.push_back(input[0]);
// input.erase(input.begin());
// }
// return output;
// }
// else cout<<"Syntax error!"<<endl;
// }
// else cout<<"Syntax error!"<<endl;
cout << "\nPassing the following arguments to dbEngine: " << endl;
cout << "command :" << input[0] << endl;
cout << "argument: " << input[1] << endl;
} }
vector<string> openCMD(vector<string> input){
//
}
vector<string> closeCMD(vector<string> input){
//
}
vector<string> saveCMD(vector<string> input){
//open-cmd ::== OPEN relation-name
//close-cmd ::== CLOSE relation-name
//save-cmd ::== SAVE relation-name
}
vector<string> updateCMD(vector<string> input){
//
}
vector<string> deleteCMD(vector<string> input){
void par_line(vector<string> input) //calls par_command() or par_query() depending on first item from token list //
{
/*
• Match the first item in the token list and determine weather this is a command or a query.
• Call functions par_command() or par_query();
• After either par_command() or par_query() returns, make sure the line ends properly with “;” token
*/
string tempChar = input.back();
if (tempChar != ";")
{
cout<<"ERROR! missing semicolon "<<endl;
}
else
{
//command
// if ( input[0] == "open-cmd" || input[0] == "close-cmd" ||
// input[0] == "save-cmd" || input[0] == "exit-cmd" ||
// input[0] == "show-cmd" || input[0] == "create-cmd" ||
// input[0] == "update-cmd" || input[0] == "insert-cmd" ||
// input[0] == "delete-cmd" )
// {
// par_command(input[0]);
// }
//query
// if ( input[0] == "select" || input[0] == "project" ||
// input[0] == "product" || input[0] == "difference" ||
// input[0] == "union" || input[0] == "renaming" ||
// input[0] == "update-cmd" || input[0] == "insert-cmd" ||
// input[0] == "delete-cmd" )
// {
// par_query(input[0]);
// }
if ( input[0] == "INSERT")
{
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
input.erase(input.begin());
vector<string> insertInput = insertCMD(input);
cout<<"arguments: "<<endl;
displayTokenList(insertInput);
}
if ( input[0] == "CREATE")
{
cout<<"\nPassing the following arguments to dbEngine: \nCommand: "<<input[0]<<endl;
input.erase(input.begin());
input.erase(input.begin());
vector<string> insertInput = insertCMD(input);
cout<<"arguments: "<<endl;
displayTokenList(insertInput);
}
if ( input[0] == "SHOW")
{
showCMD(input);
}
if ( input[0] == "EXIT")
{
exitCMD(input);
}
}
} }
int main () { int main () {