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/*
* Implementation of functions used to build the abstract syntax tree.
*/
#include "LuaSL_LSL_tree.h"
#include <stdlib.h>
/**
* @brief Allocates space for expression
* @return The expression or NULL if not enough memory
*/
static SExpression* allocateExpression()
{
SExpression* b = malloc(sizeof *b);
if( b == NULL ) return NULL;
b->type = eVALUE;
b->value = 0;
b->left = NULL;
b->right = NULL;
return b;
}
SExpression* createNumber(int value)
{
SExpression* b = allocateExpression();
if( b == NULL ) return NULL;
b->type = eVALUE;
b->value = value;
return b;
}
SExpression *createOperation(
EOperationType type,
SExpression *left,
SExpression *right)
{
SExpression* b = allocateExpression();
if( b == NULL ) return NULL;
b->type = type;
b->left = left;
b->right = right;
return b;
}
void deleteExpression(SExpression *b)
{
if (b == NULL) return;
deleteExpression(b->left);
deleteExpression(b->right);
free(b);
}
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