hello.c

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// SPDX-License-Identifier: GPL-2.0-or-later
 
/***************************************************************************
 *   Copyright (C) 2009 Zachary T Welch <zw@superlucidity.net>             *
 ***************************************************************************/
 
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <helper/log.h>
#include "hello.h"
 
COMMAND_HANDLER(handle_foo_command)
{
    if (CMD_ARGC < 1 || CMD_ARGC > 2)
        return ERROR_COMMAND_SYNTAX_ERROR;
 
    uint32_t address;
    COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
 
    const char *msg = "<unchanged>";
    if (CMD_ARGC == 2) {
        bool enable;
        COMMAND_PARSE_ENABLE(CMD_ARGV[1], enable);
        msg = enable ? "enable" : "disable";
    }
 
    LOG_INFO("%s: address=0x%8.8" PRIx32 " enabled=%s", CMD_NAME, address, msg);
    return ERROR_OK;
}
 
static bool foo_flag;
 
COMMAND_HANDLER(handle_flag_command)
{
    return CALL_COMMAND_HANDLER(handle_command_parse_bool,
        &foo_flag, "foo flag");
}
 
static const struct command_registration foo_command_handlers[] = {
    {
        .name = "bar",
        .handler = &handle_foo_command,
        .mode = COMMAND_ANY,
        .usage = "address ['enable'|'disable']",
        .help = "an example command",
    },
    {
        .name = "baz",
        .handler = &handle_foo_command,
        .mode = COMMAND_ANY,
        .usage = "address ['enable'|'disable']",
        .help = "a sample command",
    },
    {
        .name = "flag",
        .handler = &handle_flag_command,
        .mode = COMMAND_ANY,
        .usage = "[on|off]",
        .help = "set a flag",
    },
    COMMAND_REGISTRATION_DONE
};
 
static COMMAND_HELPER(handle_hello_args, const char **sep, const char **name)
{
    if (CMD_ARGC > 1)
        return ERROR_COMMAND_SYNTAX_ERROR;
    if (1 == CMD_ARGC) {
        *sep = " ";
        *name = CMD_ARGV[0];
    } else
        *sep = *name = "";
 
    return ERROR_OK;
}
COMMAND_HANDLER(handle_hello_command)
{
    const char *sep, *name;
    int retval = CALL_COMMAND_HANDLER(handle_hello_args, &sep, &name);
    if (retval == ERROR_OK)
        command_print(CMD, "Greetings%s%s!", sep, name);
    return retval;
}
 
const struct command_registration hello_command_handlers[] = {
    {
        .name = "hello",
        .handler = handle_hello_command,
        .mode = COMMAND_ANY,
        .help = "prints a warm welcome",
        .usage = "[name]",
    },
    {
        .name = "foo",
        .mode = COMMAND_ANY,
        .help = "example command handler skeleton",
        .chain = foo_command_handlers,
        .usage = "",
    },
    COMMAND_REGISTRATION_DONE
};