Обновить cv6/a_station.c

cv6/a_station.c

@@ -0,0 +1,99 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "a_station.h"
+
+
+struct station* create_station() {
+    struct station* new_station = malloc(sizeof(struct station));
+    if (new_station == NULL) return NULL;
+
+    new_station->tracks = calloc(STATION_SIZE, sizeof(struct car*));
+    if (new_station->tracks == NULL) {
+        free(new_station);
+        return NULL;
+    }
+
+    new_station->track_count = STATION_SIZE;
+    return new_station;
+}
+
+void destroy_station(struct station* station) {
+    for (int i = 0; i < station->track_count; i++) {
+        struct car* current = station->tracks[i];
+        while (current != NULL) {
+            struct car* temp = current;
+            current = current->next;
+            free(temp);
+        }
+    }
+    free(station->tracks);
+    free(station);
+}
+
+
+int select_track(struct station* station, const char* target) {
+    unsigned long hash = 5381;
+    while (*target)
+        hash = ((hash << 5) + hash) + *target++;
+    return hash % 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];
+
+
+    while (current != NULL) {
+        if (strcmp(current->value, target) == 0) {
+            current->capacity += capacity;
+            return;
+        }
+        current = current->next;
+    }
+
+    struct car* new_car = malloc(sizeof(struct car));
+    if (new_car == NULL) return;
+    strcpy(new_car->value, target);
+    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 (strcmp(current->value, target) == 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_capacity = 0;
+    for (int i = 0; i < station->track_count; i++) {
+        struct car* current = station->tracks[i];
+        while (current != NULL) {
+            total_capacity += current->capacity;
+            current = current->next;
+        }
+    }
+    return total_capacity;
+}