sim/common/sim-options.h

/* Header file for simulator argument handling.
   Copyright (C) 1997-2021 Free Software Foundation, Inc.
   Contributed by Cygnus Support.

This file is part of GDB, the GNU debugger.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef SIM_OPTIONS_H
#define SIM_OPTIONS_H

#include "getopt.h"

/* ARGV option support.

   Options for the standalone simulator are parsed by sim_open since
   sim_open handles the large majority of them and it also parses the
   options when invoked by gdb [or any external program].

   For OPTION_HANDLER: arg#2 is the processor to apply to option to
   (all if NULL); arg#3 is the option index; arg#4 is the option's
   argument, NULL if optional and missing; arg#5 is nonzero if a
   command is being interpreted. */

typedef SIM_RC (OPTION_HANDLER) (SIM_DESC, sim_cpu *, int, char *, int);

/* Declare option handlers with a macro so it's usable on k&r systems.  */
#define DECLARE_OPTION_HANDLER(fn) SIM_RC fn (SIM_DESC, sim_cpu *, int, char *, int)

typedef struct {

  /* The long option information. */

  struct option opt;

  /* The short option with the same meaning ('\0' if none).

     For short options, when OPT.VAL is non-zero, it, instead of
     SHORTOPT is passed to HANDLER.

     For example, for the below:

	{ {"dc", no_argument, NULL, OPTION_VALUE},
	    'd', NULL, "<<description>>", HANDLER},
	{ {NULL, no_argument, NULL, OPTION_VALUE},
	    'e', NULL, "<<description>>", HANDLER},

     the options --dc, -d and -e all result in OPTION_VALUE being
     passed into HANDLER. */

  char shortopt;

  /* The name of the argument (NULL if none).  */

  const char *arg;

  /* The documentation string.

     If DOC is NULL, this option name is listed as a synonym for the
     previous option.

     If DOC and DOC_NAME are the empty string (i.e. ""), this option
     is not listed in usage and help messages.

     For example, given the aliased options --dc, --dp and -d, then:

	{ {"dc", no_argument, NULL, OPTION_DC},
	    'd', NULL, "<<description>>", HANDLER},
	{ {"dp", no_argument, NULL, OPTION_DP},
	    '\0', NULL, NULL, HANDLER},

     will list ``-d, --dc, --dp <<description>>'' */

  const char *doc;

  /* A function to process the option.  */

  OPTION_HANDLER *handler;

  /* The documentation name.  Used when generating usage and help
     messages.

     If DOC and DOC_NAME are the empty string (i.e. ""), this option
     is not listed in usage and help messages.

     If DOC_NAME is a non-empty string then it, insted of OPT.NAME, is
     listed as the name of the option in usage and help messages.

     For example, given the options --set-pc and --set-sp, then:

	{ {"set-pc", no_argument, NULL, OPTION_SET_PC},
            '\0', NULL, "<<description>>", HANDLER, "--set-REGNAME" },
	{ {"set-sp", no_argument, NULL, OPTION_SET_SP},
	    '\0', NULL, "", HANDLER, "" },

     will list ``--set-REGNAME <<description>>". */

  const char *doc_name;

} OPTION;

/* All options that don't have a short form equivalent begin with this for
   `val'.  130 isn't special, just some non-ASCII value to begin at.
   Modules needn't worry about collisions here, the code dynamically assigned
   the actual numbers used and then passes the original value to the option
   handler.  */
#define OPTION_START 130

/* Identify valid option in the table */
#define OPTION_VALID_P(O) ((O)->opt.name != NULL || (O)->shortopt != '\0')

/* List of options added by various modules.  */
typedef struct option_list {
  struct option_list *next;
  const OPTION *options;
} OPTION_LIST;

/* Add a set of options to the simulator.
   CPU is the cpu the options apply to or NULL for all cpus.
   TABLE is an array of OPTIONS terminated by a NULL `opt.name' entry.  */
SIM_RC sim_add_option_table (SIM_DESC sd, sim_cpu *cpu, const OPTION *table);

/* Install handler for the standard options.  */
MODULE_INSTALL_FN standard_install;

/* Called by sim_open to parse the arguments.  */
SIM_RC sim_parse_args (SIM_DESC sd, char * const *argv);

/* Print help messages for the options.  IS_COMMAND is non-zero when
   this function is called from the command line interpreter. */
void sim_print_help (SIM_DESC sd, int is_command);

/* Print version information for the program.  IS_COMMAND is non-zero when
   this function is called from the command line interpreter. */
void sim_print_version (SIM_DESC sd, int is_command);

/* Try to parse the command as if it is an option, Only fail when
   totally unsuccessful */
SIM_RC sim_args_command (SIM_DESC sd, const char *cmd);

#endif /* SIM_OPTIONS_H */