void Parser::view_stmt(string id) {
if (tokens[look].type == SELECT) {
select_stmt(id);
} else {
extract_stmt(id);
}
}
void extract_individual_stmts(abstractSyntaxTree ast, symbol_table_ptr st,int scope)
{
abstractSyntaxTree temp;
while(ast->symbol != TK_EPSILON)
{
temp = ast->child[0];
extract_stmt(temp,st,scope);
ast = ast->child[1];
}
}
void extract_stmt(abstractSyntaxTree temp,symbol_table_ptr st, int scope )
{
identifier_list id;
char name[10];
char temp_name[10];
//printf("Stmt is : %s\n" ,tokenName[temp->symbol]);
if(temp->symbol == TK_ASSIGNOP)
{
//print_tree(temp);
//printf("Sup\n");
//printf("%d\n",temp->childnum);
if(temp->child[0]->child[0]->symbol == TK_EPSILON)
{
//print_tree(temp->child[1]);
//printf("Child1 : %s\n",tokenName[temp->child[1]->symbol]);
//printf("Searching for %s\n",temp->child[0]->value);
id = get_symtable_ptr(" ",temp->child[0]->value, st, scope);
//printf("Sym value : %s\n",id->id_name);
//printf("HI\n");
create_quadruple(temp->symbol,eval_arithmetic(temp->child[1],st,scope),NULL,id);
}
else
{
//printf("Searching for %s.%s\n",temp->child[0]->value ,temp->child[0]->child[0]->value);
id = get_symtable_ptr(temp->child[0]->value,temp->child[0]->child[0]->value, st, scope);
//printf("Sym table value : %s.%s",id->record_name,id->id_name);
create_quadruple(temp->symbol,eval_arithmetic(temp->child[1],st,scope),NULL,id);
}
}
//printf("Hi\n");*/
if(temp->symbol == TK_READ)
{
if(temp->child[0]->child[0]->symbol == TK_EPSILON)
{
id = get_symtable_ptr(" ",temp->child[0]->value, st, scope);
//printf("Sym value : %s\n",id->id_name);
create_quadruple(temp->symbol,id,NULL,NULL);
}
else
{
//printf("The record is : %s\n",temp->child[0]->value);
//printf("The id is : %s\n",temp->child[0]->child[0]->value);
id = get_symtable_ptr(temp->child[0]->value,temp->child[0]->child[0]->value, st, scope);
//printf("Sym table value : %s",id->record_name);
create_quadruple(temp->symbol,id,NULL,NULL);
}
}
else if(temp->symbol == TK_WRITE)
{
if(temp->child[0]->symbol == TK_NUM || temp->child[0]->symbol == TK_RNUM )
{
//printf("Current expr is: %s\n",temp->value);
sprintf(name , "%d", num_no);
strcpy(temp_name,"num");
strcat(temp_name,name);
id = create_identifier(3,temp->child[0]->value,temp_name,scope);
num_no ++;
create_quadruple(temp->symbol,id,NULL,NULL);
}
else if(temp->child[0]->child[0]->symbol == TK_EPSILON)
{
id = get_symtable_ptr(" ",temp->child[0]->value, st, scope);
//printf("Sym value : %s\n",id->id_name);
create_quadruple(temp->symbol,id,NULL,NULL);
}
else
{
//printf("The record is : %s\n",temp->child[0]->value);
//printf("The id is : %s\n",temp->child[0]->child[0]->value);
id = get_symtable_ptr(temp->child[0]->value,temp->child[0]->child[0]->value, st, scope);
//printf("Sym table value : %s",id->record_name);
create_quadruple(temp->symbol,id,NULL,NULL);
}
}
else if(temp->symbol == TK_IF)
{
int jump1,jump2;
//print_tree(temp->child[0]);
id = eval_boolean(temp->child[0],st,scope);
jump1 = quad_size;
create_quadruple(temp->symbol,id,NULL,NULL);
extract_stmt(temp->child[1],st,scope);
extract_individual_stmts(temp->child[2],st,scope);
if(temp->child[3]->symbol == TK_ENDIF)
{
sprintf(name , "%d", quad_size);
quad[jump1].result = create_copy(quad[jump1].result,create_identifier(0," ",name,scope));
}
else if(temp->child[3]->symbol == TK_ELSE)
{
jump2 = quad_size;
extract_stmt(temp->child[3]->child[0],st,scope);
extract_individual_stmts(temp->child[3]->child[1],st,scope);
sprintf(name , "%d", quad_size);
quad[jump1].result = create_copy(quad[jump1].result,create_identifier(0," ",name,scope));
sprintf(name , "%d", jump2);
quad[jump1].arg2 = create_copy(quad[jump1].arg2,create_identifier(0," ",name,scope));
}
}
else if(temp->symbol == TK_WHILE)
{
int jump;
create_quadruple(21,NULL,NULL,NULL);
id = eval_boolean(temp->child[0],st,scope);
create_quadruple(temp->symbol,id,NULL,NULL);
jump = quad_size-1;
extract_stmt(temp->child[1],st,scope);
extract_individual_stmts(temp->child[2],st,scope);
sprintf(name , "%d", quad_size);
quad[jump].result = create_copy(quad[jump].result,create_identifier(0," ",name,scope));
}
//printf("Bye");
}