sim/common/sim-options.h

   1 /* Header file for simulator argument handling.
   2    Copyright (C) 1997-2019 Free Software Foundation, Inc.
   3    Contributed by Cygnus Support.
   4
   5 This file is part of GDB, the GNU debugger.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef SIM_OPTIONS_H
  21 #define SIM_OPTIONS_H
  22
  23 #include "getopt.h"
  24
  25 /* ARGV option support.
  26
  27    Options for the standalone simulator are parsed by sim_open since
  28    sim_open handles the large majority of them and it also parses the
  29    options when invoked by gdb [or any external program].
  30
  31    For OPTION_HANDLER: arg#2 is the processor to apply to option to
  32    (all if NULL); arg#3 is the option index; arg#4 is the option's
  33    argument, NULL if optional and missing; arg#5 is nonzero if a
  34    command is being interpreted. */
  35
  36 typedef SIM_RC (OPTION_HANDLER) (SIM_DESC, sim_cpu *, int, char *, int);
  37
  38 /* Declare option handlers with a macro so it's usable on k&r systems.  */
  39 #define DECLARE_OPTION_HANDLER(fn) SIM_RC fn (SIM_DESC, sim_cpu *, int, char *, int)
  40
  41 typedef struct {
  42
  43   /* The long option information. */
  44
  45   struct option opt;
  46
  47   /* The short option with the same meaning ('\0' if none).
  48
  49      For short options, when OPT.VAL is non-zero, it, instead of
  50      SHORTOPT is passed to HANDLER.
  51
  52      For example, for the below:
  53
  54         { {"dc", no_argument, NULL, OPTION_VALUE},
  55             'd', NULL, "<<description>>", HANDLER},
  56         { {NULL, no_argument, NULL, OPTION_VALUE},
  57             'e', NULL, "<<description>>", HANDLER},
  58
  59      the options --dc, -d and -e all result in OPTION_VALUE being
  60      passed into HANDLER. */
  61
  62   char shortopt;
  63
  64   /* The name of the argument (NULL if none).  */
  65
  66   const char *arg;
  67
  68   /* The documentation string.
  69
  70      If DOC is NULL, this option name is listed as a synonym for the
  71      previous option.
  72
  73      If DOC and DOC_NAME are the empty string (i.e. ""), this option
  74      is not listed in usage and help messages.
  75
  76      For example, given the aliased options --dc, --dp and -d, then:
  77
  78         { {"dc", no_argument, NULL, OPTION_DC},
  79             'd', NULL, "<<description>>", HANDLER},
  80         { {"dp", no_argument, NULL, OPTION_DP},
  81             '\0', NULL, NULL, HANDLER},
  82
  83      will list ``-d, --dc, --dp <<description>>'' */
  84
  85   const char *doc;
  86
  87   /* A function to process the option.  */
  88
  89   OPTION_HANDLER *handler;
  90
  91   /* The documentation name.  Used when generating usage and help
  92      messages.
  93
  94      If DOC and DOC_NAME are the empty string (i.e. ""), this option
  95      is not listed in usage and help messages.
  96
  97      If DOC_NAME is a non-empty string then it, insted of OPT.NAME, is
  98      listed as the name of the option in usage and help messages.
  99
 100      For example, given the options --set-pc and --set-sp, then:
 101
 102         { {"set-pc", no_argument, NULL, OPTION_SET_PC},
 103             '\0', NULL, "<<description>>", HANDLER, "--set-REGNAME" },
 104         { {"set-sp", no_argument, NULL, OPTION_SET_SP},
 105             '\0', NULL, "", HANDLER, "" },
 106
 107      will list ``--set-REGNAME <<description>>". */
 108
 109   const char *doc_name;
 110
 111 } OPTION;
 112
 113 /* All options that don't have a short form equivalent begin with this for
 114    `val'.  130 isn't special, just some non-ASCII value to begin at.
 115    Modules needn't worry about collisions here, the code dynamically assigned
 116    the actual numbers used and then passes the original value to the option
 117    handler.  */
 118 #define OPTION_START 130
 119
 120 /* Identify valid option in the table */
 121 #define OPTION_VALID_P(O) ((O)->opt.name != NULL || (O)->shortopt != '\0')
 122
 123 /* List of options added by various modules.  */
 124 typedef struct option_list {
 125   struct option_list *next;
 126   const OPTION *options;
 127 } OPTION_LIST;
 128
 129 /* Add a set of options to the simulator.
 130    CPU is the cpu the options apply to or NULL for all cpus.
 131    TABLE is an array of OPTIONS terminated by a NULL `opt.name' entry.  */
 132 SIM_RC sim_add_option_table (SIM_DESC sd, sim_cpu *cpu, const OPTION *table);
 133
 134 /* Install handler for the standard options.  */
 135 MODULE_INSTALL_FN standard_install;
 136
 137 /* Called by sim_open to parse the arguments.  */
 138 SIM_RC sim_parse_args (SIM_DESC sd, char * const *argv);
 139
 140 /* Print help messages for the options.  IS_COMMAND is non-zero when
 141    this function is called from the command line interpreter. */
 142 void sim_print_help (SIM_DESC sd, int is_command);
 143
 144 /* Try to parse the command as if it is an option, Only fail when
 145    totally unsuccessful */
 146 SIM_RC sim_args_command (SIM_DESC sd, const char *cmd);
 147
 148 #endif /* SIM_OPTIONS_H */