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;
}