stack.c

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/*
 * Copyright (c) 2014-2017 Pavel Kalvoda <me@pavelkalvoda.com>
 *
 * libcbor is free software; you can redistribute it and/or modify
 * it under the terms of the MIT license. See LICENSE for details.
 */

#include "stack.h"

struct _cbor_stack _cbor_stack_init()
{
    return (struct _cbor_stack) {.top = NULL, .size = 0};
}

void _cbor_stack_pop(struct _cbor_stack *stack)
{
    struct _cbor_stack_record *top = stack->top;
    stack->top = stack->top->lower;
    _CBOR_FREE(top);
    stack->size--;
}

struct _cbor_stack_record *_cbor_stack_push(struct _cbor_stack *stack, cbor_item_t *item, size_t subitems)
{
    struct _cbor_stack_record *new_top = _CBOR_MALLOC(sizeof(struct _cbor_stack_record));
    if (new_top == NULL)
        return NULL;

    *new_top = (struct _cbor_stack_record) {stack->top, item, subitems};
    stack->top = new_top;
    stack->size++;
    return new_top;
}