int main( int argc, char **argv ){
// Init the instructions
init_instr_memory();
// CLOCK CYCLE LOOP
int instr_buffer;
while( 1 ){
// NOTE: Order matters. All functions should fetch value
// from pipelined reg before the previous stage override the
// reg values
write_back();
memory_write();
execute_2();
execute_1();
instruction_decode();
instruction_fetch();
clk++;
}
free( instruction_memory );
free( data_memory );
exit( 0 );
}
void database::execute(std::string query, std::vector <std::vector <std::string>>& result_set, unsigned int& num_rows, unsigned int& num_cols)
{
MYSQL_RES *mysql_result = nullptr;
// Assume the query returns nothing.
num_rows = 0;
num_cols = 0;
result_set.clear();
// Do the work.
execute_1 (query, result_set, nullptr, num_rows, num_cols, mysql_result);
// This version of of this member function does not require any more information.
// Clean up.
if (mysql_result != nullptr) mysql_free_result(mysql_result);
}
void database::execute(std::string query, db_row_set& row_set)
{
MYSQL_RES *mysql_result;
MYSQL_FIELD *mysql_fields;
// Prepare the base class for the database query.
row_set.clear();
// Prepare a child class for the query.
row_set.setup_child_phase_1();
// Execute the query.
execute_1(query, row_set.result_set, &row_set.null_fields, row_set.my_num_rows, row_set.my_num_cols, mysql_result);
// Resize the column descriptor list.
row_set.col_desc_list.resize(row_set.my_num_cols);
// Copy the required information from the MySQL result-set into the column descriptions.
mysql_fields = mysql_fetch_fields(mysql_result);
for (unsigned int i = 0; i < row_set.my_num_cols; i++)
{
// Column name
if (mysql_fields[i].name != NULL)
row_set.col_desc_list[i].my_name = mysql_fields[i].name;
// Column name in the database (aliases are ignored)
if (mysql_fields[i].org_name != NULL)
row_set.col_desc_list[i].my_name_in_db = mysql_fields[i].org_name;
// Database table to which the column belongs
if (mysql_fields[i].table != NULL)
row_set.col_desc_list[i].my_table = mysql_fields[i].table;
// Data length
row_set.col_desc_list[i].my_length = mysql_fields[i].length;
// Number of decimals for numeric data fields
row_set.col_desc_list[i].my_decimals = mysql_fields[i].decimals;
// Determine if nulls are allowed
row_set.col_desc_list[i].my_null_ok = (0 == (mysql_fields[i].flags & NOT_NULL_FLAG));
// Determine if this column is part of a primary key
row_set.col_desc_list[i].my_pri_key = (0 != (mysql_fields[i].flags & PRI_KEY_FLAG));
// Determine if this column auto-increments
row_set.col_desc_list[i].my_auto_inc = (0 != (mysql_fields[i].flags & AUTO_INCREMENT_FLAG));
// Data type
switch (mysql_fields[i].type)
{
case MYSQL_TYPE_TINY:
if (mysql_fields[i].flags & UNSIGNED_FLAG)
row_set.col_desc_list[i].my_type = DB_UNSIGNED_TINYINT;
else
row_set.col_desc_list[i].my_type = DB_TINYINT;
break;
case MYSQL_TYPE_SHORT:
if (mysql_fields[i].flags & UNSIGNED_FLAG)
row_set.col_desc_list[i].my_type = DB_UNSIGNED_SMALLINT;
else
row_set.col_desc_list[i].my_type = DB_SMALLINT;
break;
case MYSQL_TYPE_INT24:
if (mysql_fields[i].flags & UNSIGNED_FLAG)
row_set.col_desc_list[i].my_type = DB_UNSIGNED_MEDIUMINT;
else
row_set.col_desc_list[i].my_type = DB_MEDIUMINT;
break;
case MYSQL_TYPE_LONG:
if (mysql_fields[i].flags & UNSIGNED_FLAG)
row_set.col_desc_list[i].my_type = DB_UNSIGNED_INT;
else
row_set.col_desc_list[i].my_type = DB_INT;
break;
case MYSQL_TYPE_LONGLONG:
if (mysql_fields[i].flags & UNSIGNED_FLAG)
row_set.col_desc_list[i].my_type = DB_UNSIGNED_BIGINT;
else
row_set.col_desc_list[i].my_type = DB_BIGINT;
break;
case MYSQL_TYPE_DECIMAL:
case MYSQL_TYPE_NEWDECIMAL:
row_set.col_desc_list[i].my_type = DB_DECIMAL;
break;
case MYSQL_TYPE_FLOAT:
row_set.col_desc_list[i].my_type = DB_FLOAT;
break;
case MYSQL_TYPE_DOUBLE:
row_set.col_desc_list[i].my_type = DB_DOUBLE;
break;
case MYSQL_TYPE_BIT:
row_set.col_desc_list[i].my_type = DB_BIT;
break;
case MYSQL_TYPE_TIMESTAMP:
row_set.col_desc_list[i].my_type = DB_TIMESTAMP;
break;
case MYSQL_TYPE_DATE:
row_set.col_desc_list[i].my_type = DB_DATE;
break;
case MYSQL_TYPE_TIME:
row_set.col_desc_list[i].my_type = DB_TIME;
break;
case MYSQL_TYPE_DATETIME:
row_set.col_desc_list[i].my_type = DB_DATETIME;
break;
case MYSQL_TYPE_YEAR:
row_set.col_desc_list[i].my_type = DB_YEAR;
break;
case MYSQL_TYPE_STRING:
if (mysql_fields[i].charsetnr == 63)
row_set.col_desc_list[i].my_type = DB_BINARY;
else
row_set.col_desc_list[i].my_type = DB_CHAR;
break;
case MYSQL_TYPE_VAR_STRING:
if (mysql_fields[i].charsetnr == 63)
row_set.col_desc_list[i].my_type = DB_VARBINARY;
else
row_set.col_desc_list[i].my_type = DB_VARCHAR;
break;
case MYSQL_TYPE_BLOB:
if (mysql_fields[i].charsetnr == 63)
row_set.col_desc_list[i].my_type = DB_BLOB;
else
row_set.col_desc_list[i].my_type = DB_TEXT;
break;
case MYSQL_TYPE_SET:
row_set.col_desc_list[i].my_type = DB_SET;
break;
case MYSQL_TYPE_ENUM:
row_set.col_desc_list[i].my_type = DB_ENUM;
break;
case MYSQL_TYPE_GEOMETRY:
row_set.col_desc_list[i].my_type = DB_GEOMETRY;
break;
case MYSQL_TYPE_NULL:
row_set.col_desc_list[i].my_type = DB_NULL;
break;
default:
row_set.col_desc_list[i].my_type = DB_UNKNOWN_TYPE;
}
}
// Clean up the MySQL data structures.
mysql_free_result(mysql_result);
// Allow a child class to prepare its data structures using the query results.
row_set.setup_child_phase_2();
}