bool Sort::sort_by_time(int num_hops)
{
bool any_change = false;
if(num_hops == route->get_current()->get_num_flights())
{
any_change = true;
}
if(route->get_next())
{
RouteList *old_head, *new_head, *cur_node, *max_node;
long cur_max, temp_dur;
//initializes both heads to new head
old_head = route;
new_head = route;
//while the old head is not null
while(old_head)
{
RouteListManipulator rlm;
//initializes the current node and max node to the old head
cur_node = old_head;
max_node = old_head;
//sets max to the current node's duration of travel
cur_max = get_dur(cur_node->get_current()->get_flights());
//until it reaches the end of the list
while(cur_node)
{
//gets the current nodes duration
temp_dur = get_dur(cur_node->get_current()->get_flights());
//if the curent node's duration is greater than the max duration
if(temp_dur >= cur_max && num_hops == cur_node->get_current()->get_num_flights())
{
//sets max to current
cur_max = temp_dur;
//sets max node to current node
max_node = cur_node;
any_change = true;
}
//advances the node tracker
cur_node = cur_node->get_next();
}
if(!any_change)
{
return any_change;
}
//if the max node is the old head
if(max_node == old_head)
{
//advnaces the old head
old_head = old_head->get_next();
}
//moves the max node to the head
rlm.set_to_head(new_head, max_node);
//sets the new head to max node
new_head = max_node;
}
//changes route head to new head
route = new_head;
}
return any_change;
}
int main(int argc,char * argv [])
{
double *bbrk, in_dur;
FILE *fp;
int bbrksize, mode;
if(argc==2 && (strcmp(argv[1],"--version") == 0)) {
fprintf(stdout,"%s\n",cdp_version);
fflush(stdout);
return 0;
}
if(argc!=4) {
fprintf(stdout,"ERROR: Bad function call.\n");
fflush(stdout);
return(0);
}
if(sscanf(argv[2],"%d",&mode)!=1) {
fprintf(stdout,"ERROR: Failed to read mode.\n");
fflush(stdout);
return(0);
}
if(sscanf(argv[3],"%lf",&in_dur)!=1) {
fprintf(stdout,"ERROR: Failed to read input file duration.\n");
fflush(stdout);
return(0);
}
if((fp = fopen(argv[1],"r"))==NULL) {
fprintf(stdout,"ERROR: Failed to open file %s\n",argv[1]);
fflush(stdout);
return(0);
}
if((bbrksize = read_brkdata(&bbrk,fp,mode))<=0)
return(0);
get_dur(bbrk,bbrksize,in_dur,mode);
return(1);
}