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libcproject/lib/stack.c

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2023-01-05 19:28:05 +01:00
#include "stack.h"
struct stack *stack_initialization() {
struct stack *stack = malloc(sizeof(*stack));
if (stack == NULL) {
exit(EXIT_FAILURE);
}
stack->first = NULL;
stack->length = 0;
return stack;
}
void stack_push(struct stack *stack, void *data) {
struct stack_node *node_new = malloc(sizeof(*node_new));
if (stack == NULL || data == NULL) {
exit(EXIT_FAILURE);
}
node_new->data = data;
node_new->next = stack->first;
stack->first = node_new;
stack->length = stack->length + 1;
}
void *stack_pop(struct stack *stack) {
if (stack == NULL) {
exit(EXIT_FAILURE);
}
struct stack_node *node = stack->first;
void *data = NULL;
if (node != NULL) {
stack->first = node->next;
data = node->data;
free(node);
}
stack->length = stack->length - 1;
return data;
}