static int do_dump()

in src/jansson/src/dump.c [182:421]

• 195 lines of code
• 46 McCabe index (conditional complexity)

static int do_dump(const json_t *json, size_t flags, int depth,
                   json_dump_callback_t dump, void *data)
{
    if(!json)
        return -1;

    switch(json_typeof(json)) {
        case JSON_NULL:
            return dump("null", 4, data);

        case JSON_TRUE:
            return dump("true", 4, data);

        case JSON_FALSE:
            return dump("false", 5, data);

        case JSON_INTEGER:
        {
            char buffer[MAX_INTEGER_STR_LENGTH];
            int size;

            size = snprintf(buffer, MAX_INTEGER_STR_LENGTH,
                            "%" JSON_INTEGER_FORMAT,
                            json_integer_value(json));
            if(size < 0 || size >= MAX_INTEGER_STR_LENGTH)
                return -1;

            return dump(buffer, size, data);
        }

        case JSON_REAL:
        {
            char buffer[MAX_REAL_STR_LENGTH];
            int size;
            double value = json_real_value(json);

            size = jsonp_dtostr(buffer, MAX_REAL_STR_LENGTH, value,
                                FLAGS_TO_PRECISION(flags));
            if(size < 0)
                return -1;

            return dump(buffer, size, data);
        }

        case JSON_STRING:
            return dump_string(json_string_value(json), json_string_length(json), dump, data, flags);

        case JSON_ARRAY:
        {
            size_t n;
            size_t i;

            json_array_t *array;

            /* detect circular references */
            array = json_to_array(json);
            if(array->visited)
                goto array_error;
            array->visited = 1;

            n = json_array_size(json);

            if(dump("[", 1, data))
                goto array_error;
            if(n == 0) {
                array->visited = 0;
                return dump("]", 1, data);
            }
            if(dump_indent(flags, depth + 1, 0, dump, data))
                goto array_error;

            for(i = 0; i < n; ++i) {
                if(do_dump(json_array_get(json, i), flags, depth + 1,
                           dump, data))
                    goto array_error;

                if(i < n - 1)
                {
                    if(dump(",", 1, data) ||
                       dump_indent(flags, depth + 1, 1, dump, data))
                        goto array_error;
                }
                else
                {
                    if(dump_indent(flags, depth, 0, dump, data))
                        goto array_error;
                }
            }

            array->visited = 0;
            return dump("]", 1, data);

        array_error:
            array->visited = 0;
            return -1;
        }

        case JSON_OBJECT:
        {
            json_object_t *object;
            void *iter;
            const char *separator;
            int separator_length;

            if(flags & JSON_COMPACT) {
                separator = ":";
                separator_length = 1;
            }
            else {
                separator = ": ";
                separator_length = 2;
            }

            /* detect circular references */
            object = json_to_object(json);
            if(object->visited)
                goto object_error;
            object->visited = 1;

            iter = json_object_iter((json_t *)json);

            if(dump("{", 1, data))
                goto object_error;
            if(!iter) {
                object->visited = 0;
                return dump("}", 1, data);
            }
            if(dump_indent(flags, depth + 1, 0, dump, data))
                goto object_error;

            if(flags & JSON_SORT_KEYS || flags & JSON_PRESERVE_ORDER)
            {
                struct object_key *keys;
                size_t size, i;
                int (*cmp_func)(const void *, const void *);

                size = json_object_size(json);
                keys = jsonp_malloc(size * sizeof(struct object_key));
                if(!keys)
                    goto object_error;

                i = 0;
                while(iter)
                {
                    keys[i].serial = hashtable_iter_serial(iter);
                    keys[i].key = json_object_iter_key(iter);
                    iter = json_object_iter_next((json_t *)json, iter);
                    i++;
                }
                assert(i == size);

                if(flags & JSON_SORT_KEYS)
                    cmp_func = object_key_compare_keys;
                else
                    cmp_func = object_key_compare_serials;

                qsort(keys, size, sizeof(struct object_key), cmp_func);

                for(i = 0; i < size; i++)
                {
                    const char *key;
                    json_t *value;

                    key = keys[i].key;
                    value = json_object_get(json, key);
                    assert(value);

                    dump_string(key, strlen(key), dump, data, flags);
                    if(dump(separator, separator_length, data) ||
                       do_dump(value, flags, depth + 1, dump, data))
                    {
                        jsonp_free(keys);
                        goto object_error;
                    }

                    if(i < size - 1)
                    {
                        if(dump(",", 1, data) ||
                           dump_indent(flags, depth + 1, 1, dump, data))
                        {
                            jsonp_free(keys);
                            goto object_error;
                        }
                    }
                    else
                    {
                        if(dump_indent(flags, depth, 0, dump, data))
                        {
                            jsonp_free(keys);
                            goto object_error;
                        }
                    }
                }

                jsonp_free(keys);
            }
            else
            {
                /* Don't sort keys */

                while(iter)
                {
                    void *next = json_object_iter_next((json_t *)json, iter);
                    const char *key = json_object_iter_key(iter);

                    dump_string(key, strlen(key), dump, data, flags);
                    if(dump(separator, separator_length, data) ||
                       do_dump(json_object_iter_value(iter), flags, depth + 1,
                               dump, data))
                        goto object_error;

                    if(next)
                    {
                        if(dump(",", 1, data) ||
                           dump_indent(flags, depth + 1, 1, dump, data))
                            goto object_error;
                    }
                    else
                    {
                        if(dump_indent(flags, depth, 0, dump, data))
                            goto object_error;
                    }

                    iter = next;
                }
            }

            object->visited = 0;
            return dump("}", 1, data);

        object_error:
            object->visited = 0;
            return -1;
        }

        default:
            /* not reached */
            return -1;
    }
}