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recap_island/fundamentals/village_manager.c

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+#include "village.h"
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int add_villager(struct villager **village, unsigned int *population, struct villager villager){
+
+    if(!village || population == 0) return  -1;
+    
+    struct villager *tmp = realloc(*village, (*population + 1) * sizeof(struct villager));
+    if(!tmp) return -2;
+
+    *village = tmp;
+    (*village)[*population] = villager;
+    (*population) ++;
+    
+    return 0;
+
+}
+
+int remove_villager(struct villager **village, unsigned int *population, char *name){
+
+    if(!village || population == 0 || !name) return -1;
+    
+    if(*population == 1){
+
+        if(!strcmp(village[0]->name, name)){
+
+            free(*village);
+            *village = NULL;
+            *population = 0;
+        }
+        return 0;
+    }
+    
+    size_t index = 0;
+    int found = 0;
+    while(index < *population){
+        
+        if(found != 0){
+            (*village)[index - 1] = (*village)[index];
+        }
+        
+        if(!strcmp((*village)[index].name, name)) found ++;
+
+        index ++;
+    }
+
+    *population -= found;
+    if(*population > 0) *village = realloc(*village, (*population) * sizeof(struct villager));
+    else {
+        free(*village);
+        *village = NULL;
+    }
+    return 0;
+    
+}
+
+void clear_village(struct villager **village, unsigned int *population){
+
+    if(!village || population == 0) return ;
+
+    /*for(size_t i = 0; i < *population; i ++){
+        
+        free(village[i]);
+        village[i] = NULL;
+    }
+    //free(village);
+    */
+
+    for (unsigned int i = 0; i < *population; i++){
+        village[i] = NULL;
+    }
+    *population = 0;
+
+}
+/*
+int main(void)
+{
+
+        struct villager *village = NULL;
+    unsigned int population = 0;
+
+    struct villager tom_nook = {
+        .name = "Tom Nook",
+        .age = 99,
+        .job = SELLER,
+        .favorite_quote = "It's 42 bells",
+    };
+
+    add_villager(&village, &population, tom_nook);
+
+    struct villager marie = {
+        .name = "Marie",
+        .age = 23,
+        .job = WORKER,
+        .favorite_quote = "It's so expensive!",
+    };
+
+    add_villager(&village, &population, marie);
+
+    clear_village(&village, &population);
+
+    for (unsigned int i = 0; i < population; i++)
+    {
+        printf("I'm %s (%d)\n", village[i].name, village[i].age);
+    }
+
+    printf("%p\n", village);
+    printf("%u\n", population);
+}
+*/