Přidat du6/a_station.c

du6/a_station.c

@@ -0,0 +1,92 @@
+#include "a_station.h"
+#include <stdlib.h>
+#include <string.h>
+
+struct station* create_station() {
+    struct station* station = (struct station*)calloc(1, sizeof(struct station));
+    station->tracks = (struct car**)calloc(STATION_SIZE, sizeof(struct car*));
+    station->track_count = STATION_SIZE;
+    return station;
+}
+
+void destroy_station(struct station* station) {
+    if (station == NULL) return;
+    for (int i = 0; i < station->track_count; i++) {
+        struct car* current = station->tracks[i];
+        while (current != NULL) {
+            struct car* next = current->next;
+            free(current);
+            current = next;
+        }
+    }
+    free(station->tracks);
+    free(station);
+}
+
+int select_track(struct station* station, const char* target) {
+    unsigned long hash = 5381;
+    int c;
+    while ((c = (unsigned char)*target++)) {
+        hash = ((hash << 5) + hash) + c; // hash * 33 + c
+    }
+    return (int)(hash % (unsigned long)station->track_count);
+}
+
+void add_target_capacity(struct station* station, const char* target, int capacity) {
+    int index = select_track(station, target);
+    struct car* current = station->tracks[index];
+
+    // Hladame existujuci zaznam
+    while (current != NULL) {
+        if (strncmp(current->value, target, TARGET_SIZE) == 0) {
+            current->capacity += capacity;
+            return;
+        }
+        current = current->next;
+    }
+
+    // Zaznam neexistuje - vytvorime novy na zaciatku zoznamu
+    struct car* new_car = (struct car*)calloc(1, sizeof(struct car));
+    strncpy(new_car->value, target, TARGET_SIZE - 1);
+    new_car->value[TARGET_SIZE - 1] = '\0';
+    new_car->capacity = capacity;
+    new_car->next = station->tracks[index];
+    station->tracks[index] = new_car;
+}
+
+int get_target_capacity(struct station* station, const char* target) {
+    int index = select_track(station, target);
+    struct car* current = station->tracks[index];
+
+    while (current != NULL) {
+        if (strncmp(current->value, target, TARGET_SIZE) == 0) {
+            return current->capacity;
+        }
+        current = current->next;
+    }
+    return 0;
+}
+
+int count_targets(struct station* station) {
+    int count = 0;
+    for (int i = 0; i < station->track_count; i++) {
+        struct car* current = station->tracks[i];
+        while (current != NULL) {
+            count++;
+            current = current->next;
+        }
+    }
+    return count;
+}
+
+int count_capacity(struct station* station) {
+    int total = 0;
+    for (int i = 0; i < station->track_count; i++) {
+        struct car* current = station->tracks[i];
+        while (current != NULL) {
+            total += current->capacity;
+            current = current->next;
+        }
+    }
+    return total;
+}