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Pass tests without introducing new function

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This commit is contained in:
Isaac Shoebottom 2023-12-02 23:12:22 -04:00
parent 64f9b63215
commit 42cb09f3bd
2 changed files with 21 additions and 13 deletions
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28
Assignment8/code/disk.c
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@ -81,26 +81,34 @@ void destroyDiskQueue(DiskQueue *queue) {
DiskRequest* findClosest(DiskQueue *queue, int position, double time) { DiskRequest* findClosest(DiskQueue *queue, int position, double time) {
DiskRequest *current = queue->head; DiskRequest *current = queue->head;
DiskRequest *closest = NULL; DiskRequest *next = NULL;
DiskRequest *first = NULL;
while (current != NULL) { while (current != NULL) {
if (current->time <= time) { // Filter out requests that haven't come in yet if (current->time <= time) { // Filter out requests that haven't come in yet
if (closest == NULL) { // If there is no closest yet, set it to the current if (first == NULL) {
closest = current; first = current;
} else { } else {
int closestDistance = closest->position - position; // Distance from the closest to the current position, negative means down (bad) if (current->position < first->position) {
first = current;
}
}
int currentDistance = current->position - position; // Distance from the current to the current position, negative means down (bad) int currentDistance = current->position - position; // Distance from the current to the current position, negative means down (bad)
if (currentDistance > 0) { // If the current is up if (currentDistance > 0) { // If the current is up
if (currentDistance < closestDistance) { // If the current is closer than the closest if (next == NULL) { // If there is no next yet, set it to the current
closest = current; next = current;
} else {
int nextDistance = next->position - position; // Distance from the next to the current position, negative means down (bad)
if (currentDistance < nextDistance) { // If the current is closer than the next
next = current;
} }
} }
} }
} }
current = current->next; current = current->next;
} }
// Bad // If we didn't find a request that is above the current position, return the first as a fallback
if (closest == NULL) { if (next == NULL) {
return NULL; return first;
} }
return closest; return next;
} }