examples/cmdline/parse_obj_list.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation.
 * Copyright (c) 2009, Olivier MATZ <zer0@droids-corp.org>
 * All rights reserved.
 */

#include <stdio.h>
#include <inttypes.h>
#include <stdarg.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#include <netinet/in.h>

#include <cmdline_parse.h>
#include <cmdline_parse_ipaddr.h>

#include <rte_string_fns.h>

#include "parse_obj_list.h"

/* This file is an example of extension of libcmdline. It provides an
 * example of objects stored in a list. */

struct cmdline_token_ops token_obj_list_ops = {
        .parse = parse_obj_list,
        .complete_get_nb = complete_get_nb_obj_list,
        .complete_get_elt = complete_get_elt_obj_list,
        .get_help = get_help_obj_list,
};

int
parse_obj_list(cmdline_parse_token_hdr_t *tk, const char *buf, void *res,
        unsigned ressize)
{
        struct token_obj_list *tk2 = (struct token_obj_list *)tk;
        struct token_obj_list_data *tkd = &tk2->obj_list_data;
        struct object *o;
        unsigned int token_len = 0;

        if (*buf == 0)
                return -1;

        if (res && ressize < sizeof(struct object *))
                return -1;

        while(!cmdline_isendoftoken(buf[token_len]))
                token_len++;

        SLIST_FOREACH(o, tkd->list, next) {
                if (token_len != strnlen(o->name, OBJ_NAME_LEN_MAX))
                        continue;
                if (strncmp(buf, o->name, token_len))
                        continue;
                break;
        }
        if (!o) /* not found */
                return -1;

        /* store the address of object in structure */
        if (res)
                *(struct object **)res = o;

        return token_len;
}

int complete_get_nb_obj_list(cmdline_parse_token_hdr_t *tk)
{
        struct token_obj_list *tk2 = (struct token_obj_list *)tk;
        struct token_obj_list_data *tkd = &tk2->obj_list_data;
        struct object *o;
        int ret = 0;

        SLIST_FOREACH(o, tkd->list, next) {
                ret ++;
        }
        return ret;
}

int complete_get_elt_obj_list(cmdline_parse_token_hdr_t *tk,
                              int idx, char *dstbuf, unsigned int size)
{
        struct token_obj_list *tk2 = (struct token_obj_list *)tk;
        struct token_obj_list_data *tkd = &tk2->obj_list_data;
        struct object *o;
        int i = 0;
        unsigned len;

        SLIST_FOREACH(o, tkd->list, next) {
                if (i++ == idx)
                        break;
        }
        if (!o)
                return -1;

        len = strnlen(o->name, OBJ_NAME_LEN_MAX);
        if ((len + 1) > size)
                return -1;

        if (dstbuf)
                snprintf(dstbuf, size, "%s", o->name);

        return 0;
}


int get_help_obj_list(__attribute__((unused)) cmdline_parse_token_hdr_t *tk,
                      char *dstbuf, unsigned int size)
{
        snprintf(dstbuf, size, "Obj-List");
        return 0;
}