eon/parser/parser.c

#include <stdio.h>
#include <stdlib.h>
#include "parser.h"
#include "../vars/vars.c"

//hashmaps/link list heads
extern map_void_t *_var_map;
extern node_info *_temp_statement_head;
//struct variable *_var_head = NULL;
extern map_void_t *_function_list;

node_info* create_var_assignment_string(char *p_name, char *value) 
{
    node_info *new_node = malloc(sizeof(node_info));
    variable *new_var = make_variable_string(p_name, value);
    new_node->type = ASSIGNMENT;
    new_node->opperation = 1;
    new_node->var = new_var;
    return new_node;
}

node_info* create_var_assignment_int(char *p_name, int value) 
{
    node_info *new_node = malloc(sizeof(node_info));
    variable *new_var = make_variable_int(p_name, value);
    new_node->type = ASSIGNMENT;
    new_node->opperation = 1;
    new_node->var = new_var;
    return new_node;
}

node_info* create_var_assignment_char(char *p_name, char value) 
{
    node_info *new_node = malloc(sizeof(node_info));
    variable *new_var = make_variable_char(p_name, value);
    new_node->type = ASSIGNMENT;
    new_node->opperation = 1;
    new_node->var = new_var;
    return new_node;
}

node_info* create_var_assignment_double(char *p_name, double value) 
{
    node_info *new_node = malloc(sizeof(node_info));
    variable *new_var = make_variable_double(p_name, value);
    //new node stuff
    new_node->type = ASSIGNMENT;
    new_node->opperation = 1;
    new_node->var = new_var;
    return new_node;   
}


/*
Adds statement to linked list.

@param nodeInfo link to be added.
@return head of linked list.
*/
node_info* add_to_compound_statement(node_info *new_statement, node_info *statement_head) 
{
    if(!statement_head) 
    {
        statement_head = malloc(sizeof(node_info));
        statement_head->opperation = 5;
        statement_head->next = new_statement;
        statement_head->next->next = NULL;
        statement_head->statement_list = NULL;
    } 
    else 
    {
        node_info *p = statement_head; //make a temp of list head, so we can traverse it
        //TODO replace with double linked list end
        while (p->statement_list)
            p = p->statement_list;

        //TODO replace with double linked list end
        while (p->next)
            p = p->next;
        
        p->next = malloc(sizeof(node_info));
        p->next = new_statement;
        p->next->next = NULL;
    }
    return statement_head;
}

/*
Executes a statment.

@param nodeInfo statement to be executed
@return void.
*/

//TODO break this switch up into multiple functions
//TODO return status code possibly.
void ex(node_info *exec_node) 
{
    switch(exec_node->opperation)
    {
        case 1:
            add_var(exec_node->var->name, exec_node->var->value, _var_map);
            break;
        //TODO expression stuff
        case 2:
            break;
        //print
        case 3:
            switch(exec_node->printExpression.opperation) {
                
                case 1:
                    printf("%d\n", (int) exec_node->printExpression.value);
                    break;
                case 2:
                    printf("%s\n", exec_node->printExpression.string);
                    break;
                case 3:
                    printf("%s%lf\n", exec_node->printExpression.string, exec_node->printExpression.value);
                    break;
                default:
                    printf("{ERROR} CHECK YACC FILE FOR INCORRECT PRINT\n");
            }
            break;
        case 4:
        {
            switch(exec_node->logicalExpression.opperation) {
                case 1:
                    if (exec_node->logicalExpression.expr == 1)
                        ex(exec_node->logicalExpression.if_true);
                    break;
                case 2:
                    while (exec_node->logicalExpression.expr == 1)
                        ex(exec_node->logicalExpression.while_true);
                    break;
                default:
                    printf("{ERROR} SOMETHING WRONG WITH LOGICAL EXPRESSION CHECK YACC\n");
            }
            break;
        }
        case 5:
        {
            while(exec_node->next) 
            {
                exec_node = exec_node->next;
                ex(exec_node);
            }
            break;
        }
        case 6:
        {
            variable_values *value = get_value(exec_node->name, _var_map);
            switch(value->type) 
            {
                case VAR_STRING:        
                    printf("%s\n", value->_string);
                    break;
                case VAR_INT:
                    printf("%d\n", value->_int);
                    break;
                case VAR_CHAR:
                    printf("%c\n", value->_char);
                    break;
                case VAR_DOUBLE:
                    printf("%f\n", value->_double);
                    break;
                case VAR_VOID: //TODO add void variable type
                    break;
                default:
                    printf("{ERROR} NO SUCH VARIABLE TYPE CHECK YACC!\n");
            }
            break;
        }
        case 7:
        {
            switch(exec_node->type) 
            {    
                case FUNCTION_CALL:
                {
                    node_info *_stmts = *map_get(&*((map_void_t* ) _function_list), exec_node->name);
                    while (_stmts->next != NULL) 
                    {
                        _stmts = _stmts->next;
                        ex(_stmts);
                    }
                    break;
                }
                case FUNCTION:
                {
                    //if the list of functions already defined is null then we malloc space for it.
                    if (!_function_list) 
                    {
                        _function_list = malloc(sizeof(map_void_t));
                        exec_node->_var_list = malloc(sizeof(node_info));
                        exec_node->next = NULL;
                        exec_node->local_list = NULL;
                        map_init(&*((map_void_t *) _function_list));
                        map_init(&*((map_void_t *) exec_node->_var_list));
                        //put the function in the hashmap
                        map_set(&*((map_void_t* ) _function_list), exec_node->name, &*exec_node->_function_body);
                    } else //else we dont malloc, we just put the function inside of the hashmap.
                        map_set(&*((map_void_t* ) _function_list), exec_node->name, &*exec_node->_function_body);
                    break;
                }
                default:
                    ;
                    //TODO add error here and close
            }
            break;
        }
    }
}