src/hello.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2009 Zachary T Welch <zw@superlucidity.net>             *
   5  ***************************************************************************/
   6
   7 #ifdef HAVE_CONFIG_H
   8 #include <config.h>
   9 #endif
  10 #include <helper/log.h>
  11
  12 COMMAND_HANDLER(handle_foo_command)
  13 {
  14         if (CMD_ARGC < 1 || CMD_ARGC > 2)
  15                 return ERROR_COMMAND_SYNTAX_ERROR;
  16
  17         uint32_t address;
  18         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
  19
  20         const char *msg = "<unchanged>";
  21         if (CMD_ARGC == 2) {
  22                 bool enable;
  23                 COMMAND_PARSE_ENABLE(CMD_ARGV[1], enable);
  24                 msg = enable ? "enable" : "disable";
  25         }
  26
  27         LOG_INFO("%s: address=0x%8.8" PRIx32 " enabled=%s", CMD_NAME, address, msg);
  28         return ERROR_OK;
  29 }
  30
  31 static bool foo_flag;
  32
  33 COMMAND_HANDLER(handle_flag_command)
  34 {
  35         return CALL_COMMAND_HANDLER(handle_command_parse_bool,
  36                 &foo_flag, "foo flag");
  37 }
  38
  39 static const struct command_registration foo_command_handlers[] = {
  40         {
  41                 .name = "bar",
  42                 .handler = &handle_foo_command,
  43                 .mode = COMMAND_ANY,
  44                 .usage = "address ['enable'|'disable']",
  45                 .help = "an example command",
  46         },
  47         {
  48                 .name = "baz",
  49                 .handler = &handle_foo_command,
  50                 .mode = COMMAND_ANY,
  51                 .usage = "address ['enable'|'disable']",
  52                 .help = "a sample command",
  53         },
  54         {
  55                 .name = "flag",
  56                 .handler = &handle_flag_command,
  57                 .mode = COMMAND_ANY,
  58                 .usage = "[on|off]",
  59                 .help = "set a flag",
  60         },
  61         COMMAND_REGISTRATION_DONE
  62 };
  63
  64 static COMMAND_HELPER(handle_hello_args, const char **sep, const char **name)
  65 {
  66         if (CMD_ARGC > 1)
  67                 return ERROR_COMMAND_SYNTAX_ERROR;
  68         if (1 == CMD_ARGC) {
  69                 *sep = " ";
  70                 *name = CMD_ARGV[0];
  71         } else
  72                 *sep = *name = "";
  73
  74         return ERROR_OK;
  75 }
  76 COMMAND_HANDLER(handle_hello_command)
  77 {
  78         const char *sep, *name;
  79         int retval = CALL_COMMAND_HANDLER(handle_hello_args, &sep, &name);
  80         if (retval == ERROR_OK)
  81                 command_print(CMD, "Greetings%s%s!", sep, name);
  82         return retval;
  83 }
  84
  85 const struct command_registration hello_command_handlers[] = {
  86         {
  87                 .name = "hello",
  88                 .handler = handle_hello_command,
  89                 .mode = COMMAND_ANY,
  90                 .help = "prints a warm welcome",
  91                 .usage = "[name]",
  92         },
  93         {
  94                 .name = "foo",
  95                 .mode = COMMAND_ANY,
  96                 .help = "example command handler skeleton",
  97                 .chain = foo_command_handlers,
  98                 .usage = "",
  99         },
 100         COMMAND_REGISTRATION_DONE
 101 };