void free_exp ( cEXP* p ) {
if( p ) {
if( p->exp1 ) free_exp( p->exp1 );
if( p->exp2 ) free_exp( p->exp2 );
if( p->next ) free_exp( p->next );
free( p );
}
}
void free_stm ( cSTM* p ) {
if( p ) {
if( p->exp1 ) free_exp( p->exp1 );
if( p->exp2 ) free_exp( p->exp2 );
if( p->stm1 ) free_stm( p->stm1 );
if( p->stm2 ) free_stm( p->stm2 );
if( p->next ) free_stm( p->next );
free( p );
}
}
/*
* Free resources and exit program.
*/
static void quit(){
/* Free eduraster resources */
if(program_surface_light != NULL){
er_delete_program(program_surface_light);
program_surface_light = NULL;
}
if(program_axis != NULL){
er_delete_program(program_axis);
program_axis = NULL;
}
if(program_surface_color != NULL){
er_delete_program(program_surface_color);
program_surface_color = NULL;
}
if(va != NULL){
er_delete_vertex_array(va);
va = NULL;
}
if(color_buffer != NULL){
free(color_buffer);
color_buffer = NULL;
}
if(depth_buffer != NULL){
free(depth_buffer);
depth_buffer = NULL;
}
if(points != NULL){
free(points);
points = NULL;
}
if(index_data != NULL){
free(index_data);
index_data = NULL;
}
er_quit();
/* Free parsing structures */
if(exp_x != NULL){
free_exp(exp_x);
exp_x = NULL;
}
if(exp_y != NULL){
free_exp(exp_y);
exp_y = NULL;
}
if(exp_z != NULL){
free_exp(exp_z);
exp_z = NULL;
}
/* Free SDL structures */
if(texture != NULL){
SDL_DestroyTexture(texture);
texture = NULL;
}
if(renderer != NULL){
SDL_DestroyRenderer(renderer);
renderer = NULL;
}
if(window != NULL){
SDL_DestroyWindow(window);
window = NULL;
}
SDL_Quit();
/* Exit */
exit(0);
}
