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, see <http://www.gnu.org/licenses/>. *
  16  ***************************************************************************/
  17
  18 #ifdef HAVE_CONFIG_H
  19 #include <config.h>
  20 #endif
  21 #include <helper/log.h>
  22
  23 COMMAND_HANDLER(handle_foo_command)
  24 {
  25         if (CMD_ARGC < 1 || CMD_ARGC > 2)
  26                 return ERROR_COMMAND_SYNTAX_ERROR;
  27
  28         uint32_t address;
  29         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
  30
  31         const char *msg = "<unchanged>";
  32         if (CMD_ARGC == 2) {
  33                 bool enable;
  34                 COMMAND_PARSE_ENABLE(CMD_ARGV[1], enable);
  35                 msg = enable ? "enable" : "disable";
  36         }
  37
  38         LOG_INFO("%s: address=0x%8.8" PRIx32 " enabled=%s", CMD_NAME, address, msg);
  39         return ERROR_OK;
  40 }
  41
  42 static bool foo_flag;
  43
  44 COMMAND_HANDLER(handle_flag_command)
  45 {
  46         return CALL_COMMAND_HANDLER(handle_command_parse_bool,
  47                 &foo_flag, "foo flag");
  48 }
  49
  50 static const struct command_registration foo_command_handlers[] = {
  51         {
  52                 .name = "bar",
  53                 .handler = &handle_foo_command,
  54                 .mode = COMMAND_ANY,
  55                 .usage = "address ['enable'|'disable']",
  56                 .help = "an example command",
  57         },
  58         {
  59                 .name = "baz",
  60                 .handler = &handle_foo_command,
  61                 .mode = COMMAND_ANY,
  62                 .usage = "address ['enable'|'disable']",
  63                 .help = "a sample command",
  64         },
  65         {
  66                 .name = "flag",
  67                 .handler = &handle_flag_command,
  68                 .mode = COMMAND_ANY,
  69                 .usage = "[on|off]",
  70                 .help = "set a flag",
  71         },
  72         COMMAND_REGISTRATION_DONE
  73 };
  74
  75 static COMMAND_HELPER(handle_hello_args, const char **sep, const char **name)
  76 {
  77         if (CMD_ARGC > 1)
  78                 return ERROR_COMMAND_SYNTAX_ERROR;
  79         if (1 == CMD_ARGC) {
  80                 *sep = " ";
  81                 *name = CMD_ARGV[0];
  82         } else
  83                 *sep = *name = "";
  84
  85         return ERROR_OK;
  86 }
  87 COMMAND_HANDLER(handle_hello_command)
  88 {
  89         const char *sep, *name;
  90         int retval = CALL_COMMAND_HANDLER(handle_hello_args, &sep, &name);
  91         if (ERROR_OK == retval)
  92                 command_print(CMD_CTX, "Greetings%s%s!", sep, name);
  93         return retval;
  94 }
  95
  96 const struct command_registration hello_command_handlers[] = {
  97         {
  98                 .name = "hello",
  99                 .handler = handle_hello_command,
 100                 .mode = COMMAND_ANY,
 101                 .help = "prints a warm welcome",
 102                 .usage = "[name]",
 103         },
 104         {
 105                 .name = "foo",
 106                 .mode = COMMAND_ANY,
 107                 .help = "example command handler skeleton",
 108
 109                 .chain = foo_command_handlers,
 110         },
 111         COMMAND_REGISTRATION_DONE
 112 };