From 425ed5ab81260bc04a94a55aa8373a19e7f19f50 Mon Sep 17 00:00:00 2001
From: Hampus <hampus@hampusmat.com>
Date: Thu, 7 Jan 2021 18:14:09 +0100
Subject: fix: add indentation & optimize stack functions

---
 mazerator.c | 76 +++++++++++++++++++++++++------------------------------------
 1 file changed, 31 insertions(+), 45 deletions(-)

(limited to 'mazerator.c')

diff --git a/mazerator.c b/mazerator.c
index 25a7f7d..6c24ec0 100644
--- a/mazerator.c
+++ b/mazerator.c
@@ -5,75 +5,61 @@
 #include <ctype.h>
 #include <string.h>
 
+// Error handling
+void err(int id){
+	switch(id){
+	case 0: printf("Error: Stack overflow\nBe kind and report this problem."); break;
+	case 1: printf("Error: Stack underflow\nBe kind and report this problem."); break;
+	}
+	exit(1);
+}
+
 // The fundementals for the maze-generation algoritm
 // A stack data-structure
 struct stack
 {
-    int max_size;
-    int top;        
-    int *items;
+	int max_size;
+	int top;        
+	int *items;
 };
 
 // Create a new stack
 struct stack* new_stack(int capacity)
 {
-    struct stack *pt = (struct stack*)malloc(sizeof(struct stack));
-
-    pt->max_size = capacity;
-    pt->top = -1;
-    pt->items = (int*)malloc(sizeof(int) * capacity);
-
-    return pt;
-}
-
-// Check if a stack is empty
-int stack_is_empty(struct stack *pt)
-{
-    return pt->top == -1;
-}
-
-// Check if a stack is full
-int stack_is_full(struct stack *pt)
-{
-    return pt->top == pt->max_size - 1;
+	struct stack *pt = (struct stack*)malloc(sizeof(struct stack));
+	pt->max_size = capacity;
+	pt->top = -1;
+	pt->items = (int*)malloc(sizeof(int) * capacity);
+	return pt;
 }
 
 // Add a new item to a stack
 void stack_push(struct stack *pt, int x)
 {
-    // Avoid a overflow by checking if the stack is full
-    if (stack_is_full(pt))
-    {
-        printf("Overflow error\nProgram terminated\n");
-        exit(EXIT_FAILURE);
-    }
-
-    // Add an element and increase the top index
-    pt->items[++pt->top] = x;
+	// Avoid a overflow by checking if the stack is full
+	if (pt->top == pt->max_size - 1)
+		err(0);
+	// Add an element and increase the top index
+	pt->items[++pt->top] = x;
 }
 
 // Get the topmost item of a stack
 int stack_peek(struct stack *pt)
 {
-    // Check if the stack is empty
-    if (!stack_is_empty(pt))
-        return pt->items[pt->top];
-    else
-        exit(EXIT_FAILURE);
+	// Check if the stack is empty
+	if (pt->top == -1)
+		err(1);
+	return pt->items[pt->top];
 }
 
 // Remove the topmost item of a stack
 int stack_pop(struct stack *pt)
 {
-    // Check for a stack underflow
-    if (stack_is_empty(pt))
-    {
-        printf("Underflow error\nProgram terminated\n");
-        exit(EXIT_FAILURE);
-    }
-
-    // Decrease the stack size by 1 and (optionally) return the popped element
-    return pt->items[pt->top--];
+	// Check for a stack underflow
+	if (pt->top == -1)
+		err(0);
+	// Decrease the stack size by 1 and (optionally) return the popped element
+	return pt->items[pt->top--];
 }
 
 // Get a position in the maze from coordinates y and x
-- 
cgit v1.2.3-18-g5258