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#include "stack.h"
#include <stdlib.h>
struct stack *stack_push(struct stack *s, int e)
{
struct stack *new = malloc(sizeof(struct stack));
new->data = e;
new->next = NULL;
new->next = s;
return new;
}
struct stack *stack_pop(struct stack *s)
{
if (s == NULL)
{
return NULL;
}
struct stack *res = s->next;
free(s);
return res;
}
int stack_peek(struct stack *s)
{
return s->data;
}
struct tstack *tstack_push(struct tstack *s, struct token *e)
{
struct tstack *new = malloc(sizeof(struct tstack));
new->token = e;
new->next = NULL;
new->next = s;
return new;
}
struct tstack *tstack_pop(struct tstack *s)
{
if (s == NULL)
{
return NULL;
}
struct tstack *res = s->next;
free(s);
return res;
}
struct token *tstack_peek(struct tstack *s)
{
return s->token;
}
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