Update cv6/a_station.c

cv6/a_station.c

@@ -1,91 +1,109 @@
-#ifndef STATION_H
-#define STATION_H
-// Pocet trati k dispozicii
-#define STATION_SIZE 10
-// Maximalny pocet znakov pre ulozenie nazvu cielovej stanice
-#define TARGET_SIZE 36
+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;
+}
 
-/**
- * Jeden zaznam o kapacite do cielovej stanice
- */
-struct car {
-    // Cielova stanica / nazov
-    char value[TARGET_SIZE];
-    // Pocet cestujuchich
-    int capacity;
-    // Smernik na dalsi zaznam
-    struct car* next;
-};
+void destroy_station(struct station* station){
+    free(station->tracks);
+    free(station);
+}
 
-/**
- * Cela databaza zaznamov
- */
-struct station {
-    // Dynamicke pole smernikov na zaznamy
-    // jeden zaznam ma typ struct car*
-    struct car** tracks;
-    // Velkost pola tracks
-    int track_count;
-};
+int select_track(struct station* station, const char* target)
+{
+    int i=0;
+    char t=0;
+    while(target[i]!=0)
+    {
+      t+=target[i]; // або інша хеш функція 
+    }
+    if(t<0) {t=-t;}
+    
+    i=t%10; //інд в хеш таб
+    
+    // if(station->tracks[i]==NULL)
+    // {
+    //     ++
+    // }
+    // else
+    // {
+    //     оновимо
+    // }
+    //return ???;    
+    return i;//target[0]%10;
+}
+
+void add_target_capacity(struct station* station,const char* target, int capacity)
+{
+    int i=select_track(station, target);
+
+    struct car *nwcar = (struct car*)calloc(STATION_SIZE, sizeof(struct car));
+    nwcar->next=NULL;
+    strcpy(nwcar->value, target);
+    nwcar->capacity=capacity;
+
+    if(station->tracks[i]==NULL)
+    {        
+        station->tracks[i]=nwcar;
+    }
+
+    struct car* start = station->tracks[i];
+    struct car* this = start;    
+    while(this->next != NULL)
+    {        
+        this=this->next;
+    }
+    this->next=nwcar;
+}
+
+int get_target_capacity(struct station* station,const char* target)
+{
+     int i=select_track(station, target);
+    struct car* start = station->tracks[i];
+    struct car* this = start;    
+    while(this != NULL)
+    {
+        if(strcmp(this->value , target)==0)
+        {
+            return this->capacity;
+        }
+        this=this->next;
+    }           
+    return 0;
+}
+
+int count_targets(struct station* station)
+{
+    int k=0;
+    for (int i = 0 ; i< station->track_count; i++)
+    {
+        struct car* start = station->tracks[i];
+        struct car* this = start;    
+        while(this != NULL)
+        {
+            k++;
+            this=this->next;
+        }       
+    }
+    return k;
+}
+
+int count_capacity(struct station* station){
+    int k=0;
+
+    for (int i = 0 ; i< station->track_count; i++)
+    {
+        struct car* start = station->tracks[i];
+        struct car* this = start;
+    
+        while(this != NULL)
+        {
+            k+=this->capacity;
+            this=this->next;
+        }       
+    }
+    return k;
+}
 
 
-/**
- * Vytvori prazdnu stanicu.
- * Alokuje pole smernikov tracks na pociatocnu kapacitu STATION_SIZE
- * nastavi velkost capacity na STATION_SIZE
- * @return smernik na prazdnu stanicu
- */
-struct station* create_station();
-
-/**
- * Uvolni pamat
- * @param smernik na databazu
- */
-void destroy_station(struct station* station);
-
-/**
- * Vyberie poziciu v poli station->tracks pre ulozenie zaznamu target
- *
- * Proces vyberu by mal splnat kriteria pre hash funkciu:
- * - rovnaky retazec by mal vzdy mat rovnaky vysledok
- * - pre rozne retazce by mali byt vysledky co najviac rozne
- *
- * @param smernik na databazu
- * @param nazov cielovej stanice
- * @return cislo v intervale 0 az N-1, kde N je  station->track_count
- */
-int select_track(struct station* station, const char* target);
-
-/**
- * Zvysi zaznam o pocte cestujucich do danej cielovej stanice.
- *
- * Najprv sa vyberie cielova trat pomocou select_track(). Ak zaznam neexistuje, 
- * vytvori sa novy. Ak zaznam na danej trati (spojkovom zozname) existuje, cislo sa pripocita.
- * V databaze nesmu byt dva zaznamy s rovnakou cielovou stanicou.
- *
- * @param smernik na databazu
- * @param nazov cielovej stanice
- */
-void add_target_capacity(struct station* station,const char* target, int capacity);
-
-/**
- * Ziska zaznam o cielovej stanici.
- * @param smernik na databazu
- * @param nazov cielovej stanice
- *
- * @return kapacitu do cielovej stanice. Ak sa zaznam nenachedza, vrati nula.
- */
-int get_target_capacity(struct station* station,const char* target);
-
-/**
- * Spocita pocet cielovych stanic
- * @param smernik na databazu
- */
-int count_targets(struct station* station);
-
-/**
- * Spocita kapacitu vo vsetkych zaznamoch
- * @param smernik na databazu
- */
-int count_capacity(struct station* station);
-#endif