From 5ecd7d42c7af28483283470ebe3c3cb04086f672 Mon Sep 17 00:00:00 2001
From: Anton Dolozin <anton.dolozin@student.tuke.sk>
Date: Tue, 4 Nov 2025 22:40:17 +0100
Subject: [PATCH] Trying hashmaps

---
 du5/Makefile    |  13 +++++++
 du5/a_station.c |  63 +++++++++++++++++++++++++++++++++
 du5/a_station.h |  91 ++++++++++++++++++++++++++++++++++++++++++++++++
 du5/a_station.o | Bin 0 -> 4440 bytes
 du5/main.c      |  41 ++++++++++++++++++++++
 du5/main.o      | Bin 0 -> 6856 bytes
 du5/station     | Bin 0 -> 35368 bytes
 7 files changed, 208 insertions(+)
 create mode 100644 du5/Makefile
 create mode 100644 du5/a_station.c
 create mode 100644 du5/a_station.h
 create mode 100644 du5/a_station.o
 create mode 100644 du5/main.c
 create mode 100644 du5/main.o
 create mode 100755 du5/station

diff --git a/du5/Makefile b/du5/Makefile
new file mode 100644
index 0000000..8cec7f4
--- /dev/null
+++ b/du5/Makefile
@@ -0,0 +1,13 @@
+CFLAGS= -std=c99 -g -Wall -Werror
+
+all: station
+
+%.o: %.c
+	gcc -c -o $@ $< $(CFLAGS)
+
+station: main.o a_station.o
+	gcc $(CFLAGS) main.o a_station.o -o station
+
+clean:
+	rm *.o station
+
diff --git a/du5/a_station.c b/du5/a_station.c
new file mode 100644
index 0000000..be8814c
--- /dev/null
+++ b/du5/a_station.c
@@ -0,0 +1,63 @@
+#include "a_station.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.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){
+    free(station->tracks);
+    free(station);
+}
+
+int select_track(struct station* station, const char* target){
+    int hash = 0;
+    for (int  i = 0; i < strlen(target); i++)
+    { hash += target[i];
+        
+    }
+    hash = hash %station->track_count;
+    
+
+    return hash;
+}
+
+void add_target_capacity(struct station* station,const char* target, int capacity){
+    struct car* ptr = *station->tracks;
+   int count = 0;
+   int res = select_track(station, target);
+   while(count != res){
+
+    ptr = ptr->next;
+    count++;
+
+   }
+   if(!ptr){
+    ptr = (struct car*)calloc(capacity, sizeof(struct car));
+    ptr->capacity = capacity;
+    strcpy(ptr->value, target);
+    ptr->next = NULL;
+    return;
+   }
+   ptr->capacity += capacity;
+   
+
+}
+
+int get_target_capacity(struct station* station,const char* target){
+    return 0;
+}
+
+int count_targets(struct station* station){
+    return 0;
+}
+
+int count_capacity(struct station* station){
+    return 0;
+}
+
diff --git a/du5/a_station.h b/du5/a_station.h
new file mode 100644
index 0000000..ce8c733
--- /dev/null
+++ b/du5/a_station.h
@@ -0,0 +1,91 @@
+#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
+
+/**
+ * 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;
+};
+
+/**
+ * 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;
+};
+
+
+/**
+ * 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
diff --git a/du5/a_station.o b/du5/a_station.o
new file mode 100644
index 0000000000000000000000000000000000000000..2ae49c96475d15d2e40ca5e7e55018eb6b83f8e2
GIT binary patch
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diff --git a/du5/main.c b/du5/main.c
new file mode 100644
index 0000000..a909625
--- /dev/null
+++ b/du5/main.c
@@ -0,0 +1,41 @@
+#include "a_station.h"
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+
+void print_station(struct station* station){
+    // Vypise celu stanicu
+    printf("station>>>\n");
+    // Prechadza vsetky trate
+    for (int i = 0 ; i< station->track_count; i++){
+        struct car* start = station->tracks[i];
+        struct car* this = start;
+        // Prechadza vsetky vozne
+        while(this != NULL){
+            printf("%s %d -> ",this->value,this->capacity);
+            this=this->next;
+        }
+        printf("NULL\n");
+    }
+    printf("<<<station\n");
+}
+// Pre overenie ci to ide v poriadku
+void test_station(struct station* station){
+   const char* stations[] = {"Presov","Kosice","Banska Bystrica","Banska Stiavnica","Povazska Bystrica","Snina","Humenne","Bratislava","Pezinok","Skalica","Ruzomberok","Bidovce","Michalovce","Poprad","Krompachy","Smizany","Vajkovce","Budimir","Modra","Myslava","Roznava","Gemerska Poloma","Stratena","Dobsina","Michalany","Kostolany"};
+   int size=26;
+   for (int i = 0; i < 50; i++){
+       int s = rand() % size;
+       int c = rand() % 20;
+       printf("%s %d\n",stations[s],c);
+       add_target_capacity(station,stations[s],c);
+       print_station(station);
+   }
+}
+
+int main(){
+   srand(time(NULL));
+   struct station* station = create_station();
+   test_station(station);
+   destroy_station(station);
+   return 0;
+}
diff --git a/du5/main.o b/du5/main.o
new file mode 100644
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