src/hello.c

   1 /***************************************************************************
   2  *   Copyright (C) 2009 Zachary T Welch <zw@superlucidity.net>             *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  18  ***************************************************************************/
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include <config.h>
  22 #endif
  23 #include <helper/log.h>
  24
  25 COMMAND_HANDLER(handle_foo_command)
  26 {
  27         if (CMD_ARGC < 1 || CMD_ARGC > 2)
  28         {
  29                 return ERROR_COMMAND_SYNTAX_ERROR;
  30         }
  31
  32         uint32_t address;
  33         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
  34
  35         const char *msg = "<unchanged>";
  36         if (CMD_ARGC == 2)
  37         {
  38                 bool enable;
  39                 COMMAND_PARSE_ENABLE(CMD_ARGV[1], enable);
  40                 msg = enable ? "enable" : "disable";
  41         }
  42
  43         LOG_INFO("%s: address=0x%8.8" PRIx32 " enabled=%s", CMD_NAME, address, msg);
  44         return ERROR_OK;
  45 }
  46
  47 static bool foo_flag;
  48
  49 COMMAND_HANDLER(handle_flag_command)
  50 {
  51         return CALL_COMMAND_HANDLER(handle_command_parse_bool,
  52                         &foo_flag, "foo flag");
  53 }
  54
  55 static const struct command_registration foo_command_handlers[] = {
  56         {
  57                 .name = "bar",
  58                 .handler = &handle_foo_command,
  59                 .mode = COMMAND_ANY,
  60                 .usage = "address ['enable'|'disable']",
  61                 .help = "an example command",
  62         },
  63         {
  64                 .name = "baz",
  65                 .handler = &handle_foo_command,
  66                 .mode = COMMAND_ANY,
  67                 .usage = "address ['enable'|'disable']",
  68                 .help = "a sample command",
  69         },
  70         {
  71                 .name = "flag",
  72                 .handler = &handle_flag_command,
  73                 .mode = COMMAND_ANY,
  74                 .usage = "[on|off]",
  75                 .help = "set a flag",
  76         },
  77         COMMAND_REGISTRATION_DONE
  78 };
  79
  80 static COMMAND_HELPER(handle_hello_args, const char **sep, const char **name)
  81 {
  82         if (CMD_ARGC > 1)
  83         {
  84                 return ERROR_COMMAND_SYNTAX_ERROR;
  85         }
  86         if (1 == CMD_ARGC)
  87         {
  88                 *sep = " ";
  89                 *name = CMD_ARGV[0];
  90         }
  91         else
  92                 *sep = *name = "";
  93
  94         return ERROR_OK;
  95 }
  96 COMMAND_HANDLER(handle_hello_command)
  97 {
  98         const char *sep, *name;
  99         int retval = CALL_COMMAND_HANDLER(handle_hello_args, &sep, &name);
 100         if (ERROR_OK == retval)
 101                 command_print(CMD_CTX, "Greetings%s%s!", sep, name);
 102         return retval;
 103 }
 104
 105 const struct command_registration hello_command_handlers[] = {
 106         {
 107                 .name = "hello",
 108                 .handler = handle_hello_command,
 109                 .mode = COMMAND_ANY,
 110                 .help = "prints a warm welcome",
 111                 .usage = "[name]",
 112         },
 113         {
 114                 .name = "foo",
 115                 .mode = COMMAND_ANY,
 116                 .help = "example command handler skeleton",
 117
 118                 .chain = foo_command_handlers,
 119         },
 120         COMMAND_REGISTRATION_DONE
 121 };