107 lines
2.4 KiB
C
107 lines
2.4 KiB
C
#include "a_station.h"
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#include <stdlib.h>
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#include <string.h>
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struct station* create_station(){
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struct station* stanica = calloc(1, sizeof(struct station));
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stanica->tracks = calloc(STATION_SIZE, sizeof(struct car*));
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stanica->track_count = STATION_SIZE;
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return stanica;
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}
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void destroy_station(struct station* stanica){
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for (int i = 0; i < stanica->track_count; i++){
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struct car* aktualny = stanica->tracks[i];
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while (aktualny != NULL){
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struct car* nasledujuci = aktualny->next;
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free(aktualny);
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aktualny = nasledujuci;
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}
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}
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free(stanica->tracks);
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free(stanica);
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}
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int select_track(struct station* stanica, const char* ciel){
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unsigned long heslo = 5381;
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int znak;
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while ((znak = *ciel++)){
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heslo = ((heslo << 5) + heslo) + znak;
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}
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return heslo % stanica->track_count;
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}
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void add_target_capacity(struct station* stanica, const char* ciel, int kapacita){
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int index = select_track(stanica, ciel);
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struct car* aktualny = stanica->tracks[index];
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while (aktualny != NULL){
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if (strcmp(aktualny->value, ciel) == 0){
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aktualny->capacity += kapacita;
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return;
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}
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aktualny = aktualny->next;
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}
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struct car* novy = calloc(1, sizeof(struct car));
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strncpy(novy->value, ciel, TARGET_SIZE - 1);
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novy->capacity = kapacita;
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novy->next = stanica->tracks[index];
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stanica->tracks[index] = novy;
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}
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int get_target_capacity(struct station* stanica, const char* ciel){
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int index = select_track(stanica, ciel);
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struct car* aktualny = stanica->tracks[index];
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while (aktualny != NULL){
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if (strcmp(aktualny->value, ciel) == 0){
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return aktualny->capacity;
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}
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aktualny = aktualny->next;
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}
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return 0;
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}
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int count_targets(struct station* stanica){
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int pocet = 0;
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for (int i = 0; i < stanica->track_count; i++){
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struct car* aktualny = stanica->tracks[i];
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while (aktualny != NULL){
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pocet++;
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aktualny = aktualny->next;
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}
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}
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return pocet;
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}
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int count_capacity(struct station* stanica){
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int celkovo = 0;
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for (int i = 0; i < stanica->track_count; i++){
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struct car* aktualny = stanica->tracks[i];
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while (aktualny != NULL){
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celkovo += aktualny->capacity;
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aktualny = aktualny->next;
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}
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}
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return celkovo;
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}
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