From 3564e513623bb3fc4d528d3d29df9aa91dae1396 Mon Sep 17 00:00:00 2001
From: thing1 <thing1@seacrossedlovers.xyz>
Date: Mon, 7 Oct 2024 13:01:30 +0100
Subject: did some electronics and comp sci work

---
 comp/work/37/stack.c | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 comp/work/37/stack.c

(limited to 'comp/work/37/stack.c')

diff --git a/comp/work/37/stack.c b/comp/work/37/stack.c
new file mode 100644
index 0000000..3c1ab19
--- /dev/null
+++ b/comp/work/37/stack.c
@@ -0,0 +1,42 @@
+#include <stddef.h>
+#include <stdlib.h>
+
+typedef struct stack {
+	int *sp;
+	int value;
+	int (*pop)(struct stack *stack);
+	void (*push)(struct stack *stack, int value);
+	void (*free)(struct stack *strack);
+	int *stack;
+} stack;
+
+int pop(stack *stack){
+	stack->sp -= sizeof(int);
+	int i = *stack->sp;
+	*stack->sp = stack->value;
+	return i;
+}
+
+void push(stack *stack, int value){
+	*stack->sp = value;
+	stack->sp += sizeof(int);
+}
+
+void deinitstack(stack *stack){
+	free(stack->stack);
+	free(stack);
+	stack = NULL;
+}
+
+stack *initstack(int value, size_t size){
+	stack *s = malloc(sizeof(stack));
+	s->stack = calloc(0, size*sizeof(int));
+	s->sp = s->stack;
+	s->value = value;
+	s->pop = &pop;
+	s->push = &push;
+	s->free = &deinitstack;
+
+	return s;
+}
+
-- 
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