From 4bdad2d5c7dec0eb19c418cadb47cc3124092310 Mon Sep 17 00:00:00 2001
From: Rasmus Luha <rasmus.luha@gmail.com>
Date: Thu, 3 Nov 2022 01:08:28 +0200
Subject: praks IV done

---
 src/stack.c | 99 ++++++++++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 72 insertions(+), 27 deletions(-)

(limited to 'src/stack.c')

diff --git a/src/stack.c b/src/stack.c
index d29d1a7..afdf243 100644
--- a/src/stack.c
+++ b/src/stack.c
@@ -1,55 +1,100 @@
-#include "stack.h"
 #include <stdio.h>
+#include <stdlib.h>
+#include "stack.h"
 
-#define STACK_SIZE 100
+void stackPush(struct stack_st* s, int val){
 
-struct stack_st stack = { .len = 0, .arr = {0}};
+  if (s->len == 0 || s->arr == NULL){
 
-// Functions
+    // Peame küsima mälu
+    s->size = 1;
+    //printf("yeet: %d\n", *(s->arr));
+    s->arr = (int*) malloc(s->size * sizeof(int));
 
-void stackPush(int val){
-  if (stack.len >= STACK_SIZE){
-	printf("Stack overrflow\n");
-	return;
+    // Kontrollime, et mälu allokeermisel ei tekinud probleeme
+    if (s->arr == NULL) {
+	    printf("Mälu otsas\n");
+        return;
+    }
+    s->arr[s->len++] = val;
+
+  } // s->len == 0 end
+
+  else if (s->len == s->size){
+    int tmp_size = 2 * s->size;
+    int* tmp_arr = realloc(s->arr, tmp_size);
+
+    // Kontrollime, kas saime mälu juurde
+    if (tmp_arr == NULL) {
+	    printf("Mäluala suurendamine Erroris\n");
+        return;
+    }
+
+    s->size = tmp_size;
+    s->arr = tmp_arr;
+
+    s->arr[s->len] = val;
+    s->len++;
+    return;
+  }
+  else {
+    s->arr[s->len++] = val;
   }
-  stack.arr[stack.len] = val;
-  stack.len++;
-  return;
 }
 
 
-int stackPop(void){
-  if (stackIsEmpty()){
-	return 0;
+int stackPop(struct stack_st *s){
+  int x = s->arr[--s->len];
+  int tmp_size = s->size / 2;
+
+  // Kui vaja s-> mälu suurust kahandada
+  if (s->len < tmp_size){
+     int* tmp_arr = realloc(s->arr, tmp_size);
+
+     if (!tmp_arr){
+         printf("No good, malu otsas");
+         return 0;
+     }
+
+  s->size = tmp_size;
+  s->arr = tmp_arr;
   }
-  int stackPopped = stack.arr[--stack.len];
-  return stackPopped;
+
+  if (s->len == 0)
+      stackFree(s);
+
+  return x;
+}
+
+void stackFree(struct stack_st *s){
+  free(s->arr); 
+  s->arr = NULL;
 }
 
 
-int stackIsEmpty(void) {
-    return !(stack.len > 0);
+int stackIsEmpty(struct stack_st *s) {
+    return !(s->len > 0);
 }
 
 
-int stackPeek(){
-	// To avoid funking up the stack.len
-	if (stackIsEmpty()) return 0;
-	else if (stack.len == 1) return stack.arr[1];
+int stackPeek(struct stack_st *s){
+	// To avoid funking up the s->len
+	if (stackIsEmpty(s)) return 0;
+	else if (s->len == 1) return s->arr[1];
 	else{
-		int x = stackPop();
-		stackPush(x);
+		int x = stackPop(s);
+		stackPush(s, x);
 		return x;
 	}
 }
 
 
-void stackPrint(){
+void stackPrint(struct stack_st *s){
 	while(1){
-		if(stackIsEmpty())
+		if(stackIsEmpty(s))
 			break;
 
-		int x = stackPop();
+		int x = stackPop(s);
 		printf("%d\n", x);
 	}
 	return;
-- 
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