stack.h

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#ifndef STACK_H_
#define STACK_H_
 
#include <stdbool.h>
#include <stddef.h>
 
typedef struct StackNode {
  void* data;             
  struct StackNode* next; 
} StackNode;
 
typedef struct {
  StackNode* top; 
  size_t element_size; 
  size_t size;         
} Stack;
 
void stack_init(Stack* stack, size_t element_size);
 
void stack_destroy(Stack* stack);
 
bool stack_push(Stack* stack, const void* data);
 
bool stack_pop(Stack* stack);
 
void* stack_top(Stack* stack);
 
int stack_search(Stack* stack, int (*cmp_fn)(void*, void*), void* key);
 
int stack_size(const Stack* stack);
 
#endif  // STACK_H_