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  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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                 return ERROR_COMMAND_SYNTAX_ERROR;
  29
  30         uint32_t address;
  31         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
  32
  33         const char *msg = "<unchanged>";
  34         if (CMD_ARGC == 2) {
  35                 bool enable;
  36                 COMMAND_PARSE_ENABLE(CMD_ARGV[1], enable);
  37                 msg = enable ? "enable" : "disable";
  38         }
  39
  40         LOG_INFO("%s: address=0x%8.8" PRIx32 " enabled=%s", CMD_NAME, address, msg);
  41         return ERROR_OK;
  42 }
  43
  44 static bool foo_flag;
  45
  46 COMMAND_HANDLER(handle_flag_command)
  47 {
  48         return CALL_COMMAND_HANDLER(handle_command_parse_bool,
  49                 &foo_flag, "foo flag");
  50 }
  51
  52 static const struct command_registration foo_command_handlers[] = {
  53         {
  54                 .name = "bar",
  55                 .handler = &handle_foo_command,
  56                 .mode = COMMAND_ANY,
  57                 .usage = "address ['enable'|'disable']",
  58                 .help = "an example command",
  59         },
  60         {
  61                 .name = "baz",
  62                 .handler = &handle_foo_command,
  63                 .mode = COMMAND_ANY,
  64                 .usage = "address ['enable'|'disable']",
  65                 .help = "a sample command",
  66         },
  67         {
  68                 .name = "flag",
  69                 .handler = &handle_flag_command,
  70                 .mode = COMMAND_ANY,
  71                 .usage = "[on|off]",
  72                 .help = "set a flag",
  73         },
  74         COMMAND_REGISTRATION_DONE
  75 };
  76
  77 static COMMAND_HELPER(handle_hello_args, const char **sep, const char **name)
  78 {
  79         if (CMD_ARGC > 1)
  80                 return ERROR_COMMAND_SYNTAX_ERROR;
  81         if (1 == CMD_ARGC) {
  82                 *sep = " ";
  83                 *name = CMD_ARGV[0];
  84         } else
  85                 *sep = *name = "";
  86
  87         return ERROR_OK;
  88 }
  89 COMMAND_HANDLER(handle_hello_command)
  90 {
  91         const char *sep, *name;
  92         int retval = CALL_COMMAND_HANDLER(handle_hello_args, &sep, &name);
  93         if (ERROR_OK == retval)
  94                 command_print(CMD_CTX, "Greetings%s%s!", sep, name);
  95         return retval;
  96 }
  97
  98 const struct command_registration hello_command_handlers[] = {
  99         {
 100                 .name = "hello",
 101                 .handler = handle_hello_command,
 102                 .mode = COMMAND_ANY,
 103                 .help = "prints a warm welcome",
 104                 .usage = "[name]",
 105         },
 106         {
 107                 .name = "foo",
 108                 .mode = COMMAND_ANY,
 109                 .help = "example command handler skeleton",
 110
 111                 .chain = foo_command_handlers,
 112         },
 113         COMMAND_REGISTRATION_DONE
 114 };