stack.h

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/*
    Copyright 2019 Joel Svensson        svenssonjoel@yahoo.se
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef STACK_H_
#define STACK_H_
 
 
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
 
#include "lbm_types.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct {
  lbm_uint* data;
  lbm_uint sp;
  lbm_uint size;
  lbm_uint max_sp;
} lbm_stack_t;
 
int lbm_stack_allocate(lbm_stack_t *s, lbm_uint stack_size);
int lbm_stack_create(lbm_stack_t *s, lbm_uint* data, lbm_uint size);
void lbm_stack_free(lbm_stack_t *s);
void lbm_stack_clear(lbm_stack_t *s);
lbm_uint *lbm_get_stack_ptr(lbm_stack_t *s, lbm_uint n);
int lbm_stack_drop(lbm_stack_t *s, lbm_uint n);
 
lbm_uint *lbm_stack_reserve(lbm_stack_t *s, lbm_uint n);
int lbm_push(lbm_stack_t *s, lbm_uint val);
int lbm_pop(lbm_stack_t *s, lbm_uint *val);
 
static inline int lbm_stack_is_empty(lbm_stack_t *s) {
  if (s->sp == 0) return 1;
  return 0;
}
 
int lbm_push_2(lbm_stack_t *s, lbm_uint val0, lbm_uint val1);
 
int lbm_pop_2(lbm_stack_t *s, lbm_uint *r0, lbm_uint *r1);
 
int lbm_pop_3(lbm_stack_t *s, lbm_uint *r0, lbm_uint *r1, lbm_uint *r2);
 
#ifdef __cplusplus
}
#endif
#endif