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trader/src/trader.c

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/************************************************************************
* *
* Star Traders: A Game of Interstellar Trading *
* Copyright (C) 1990-2011, John Zaitseff *
* *
************************************************************************/
/*
Author: John Zaitseff <J.Zaitseff@zap.org.au>
$Id$
Star Traders is a simple game of interstellar trading, where the object
of the game is to create companies, buy and sell shares, borrow and
repay money, in order to become the wealthiest player (the winner).
This file, trader.c, contains the main program for Star Traders.
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/.
*/
#include "trader.h"
/************************************************************************
* Internal function declarations *
************************************************************************/
int main (int argc, char *argv[]);
void process_cmdline (int argc, char *argv[]);
void show_version (void) __attribute__((noreturn));
void show_usage (int status) __attribute__((noreturn));
void init_program (void);
void end_program (void);
/************************************************************************
* Main program *
************************************************************************/
int main (int argc, char *argv[])
{
init_program_name(argv);
// Initialise the locale
if (setlocale(LC_ALL, "") == NULL) {
err_exit("could not set locale (check LANG, LC_ALL and LANGUAGE in environment)");
}
// Process command line arguments
process_cmdline(argc, argv);
// Set up the display, internal low-level routines, etc.
init_program();
// Play the actual game
init_game();
while (! quit_selected && ! abort_game && turn_number <= max_turn) {
selection_t selection;
select_moves();
selection = get_move();
process_move(selection);
exchange_stock();
next_player();
}
end_game();
// Finish up...
end_program();
return EXIT_SUCCESS;
}
/************************************************************************
* Command line processing *
************************************************************************/
/* Constants for command line options */
enum options_char {
OPTION_NO_COLOR = 1,
};
static const char options_short[] = "hV";
/* -h --help
-V --version
*/
static struct option const options_long[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{ "no-color", no_argument, NULL, OPTION_NO_COLOR },
{ "no-colour", no_argument, NULL, OPTION_NO_COLOR },
{ NULL, 0, NULL, 0 }
};
/*-----------------------------------------------------------------------
Function: process_cmdline - Process command line arguments
Arguments: argc - Same as passed to main()
argv - Same as passed to main()
Returns: (nothing)
This function processes the command line arguments passed through argc
and argv, setting global variables as appropriate.
*/
void process_cmdline (int argc, char *argv[])
{
int c;
// Process arguments starting with "-" or "--"
opterr = true;
while (true) {
c = getopt_long(argc, argv, options_short, options_long, NULL);
if (c == EOF)
break;
switch (c) {
case 'h':
// -h, --help: show help
show_usage(EXIT_SUCCESS);
break;
case 'V':
// -V, --version: show version information
show_version();
break;
case OPTION_NO_COLOR:
// --no-color, --no-colour: don't use colour
option_no_color = true;
break;
default:
show_usage(EXIT_FAILURE);
}
}
// Process remaining arguments
if ((optind < argc) && (argv[optind] != NULL)) {
if (argv[optind][0] == '-') {
fprintf(stderr, "%s: invalid operand `%s'\n", program_name(),
argv[optind]);
show_usage(EXIT_FAILURE);
}
if ((strlen(argv[optind]) == 1) &&
(*argv[optind] >= '1') && (*argv[optind] <= '9')) {
game_num = *argv[optind] - '0';
} else {
fprintf(stderr, "%s: invalid game number `%s'\n",
program_name(), argv[optind]);
show_usage(EXIT_FAILURE);
}
optind++;
}
if ((optind < argc) && (argv[optind] != NULL)) {
fprintf(stderr, "%s: extra operand `%s'\n", program_name(),
argv[optind]);
show_usage(EXIT_FAILURE);
}
}
/*-----------------------------------------------------------------------
Function: show_version - Show program version information
Arguments: (none)
Returns: (nothing)
This function displays version information about this program, then
terminates.
*/
void show_version (void)
{
printf("\
" PACKAGE_NAME " (%s) %s\n\
Copyright (C) %s, John Zaitseff.\n\
\n\
Star Traders is a simple game of interstellar trading, where the object\n\
of the game is to create companies, buy and sell shares, borrow and repay\n\
money, in order to become the wealthiest player (the winner).\n\
\n\
This program is free software that is distributed under the terms of the\n\
GNU General Public License, version 3 or later. You are welcome to\n\
modify and/or distribute it under certain conditions. This program has\n\
NO WARRANTY, to the extent permitted by law; see the License for details.\n\
", program_name(), PACKAGE_VERSION, "1990-2011");
exit(EXIT_SUCCESS);
}
/*-----------------------------------------------------------------------
Function: show_usage - Show command line usage information
Arguments: status - Exit status
Returns: (nothing)
This function displays usage information to standard output or standard
error, then terminates.
*/
void show_usage (int status)
{
const char *pn = program_name();
if (status != EXIT_SUCCESS) {
fprintf(stderr, "%s: Try `%s --help' for more information.\n",
pn, pn);
} else {
printf("Usage: %s [OPTION ...] [GAME]\n", pn);
printf("\
Play Star Traders, a simple game of interstellar trading.\n\n\
");
printf("\
Options:\n\
-V, --version output version information and exit\n\
-h, --help display this help and exit\n\
--no-color don't use colour for displaying text\n\n\
");
printf("\
If GAME is specified as a number between 1 and 9, load and continue\n\
playing that game. If GAME is not specified, start a new game.\n\n\
");
#ifdef PACKAGE_AUTHOR
printf("Report bugs to %s <%s>.\n", PACKAGE_AUTHOR, PACKAGE_BUGREPORT);
#else
printf("Report bugs to <%s>.\n", PACKAGE_BUGREPORT);
#endif
#ifdef PACKAGE_PACKAGER_BUG_REPORTS
printf("Report %s bugs to <%s>.\n", PACKAGE_PACKAGER, PACKAGE_PACKAGER_BUG_REPORTS);
#endif
#ifdef PACKAGE_URL
printf(PACKAGE_NAME " home page: <%s>.\n", PACKAGE_URL);
#endif
}
exit(status);
}
/************************************************************************
* Initialisation and deinitialisation function definitions *
************************************************************************/
/*-----------------------------------------------------------------------
Function: init_program - Initialise program-wide functions
Arguments: (none)
Returns: (nothing)
This function initialises the terminal display, internal low-level
routines, etc.
*/
void init_program (void)
{
// Initialise the random number generator
init_rand();
// Initialise signal-handling functions
// @@@ To be completed
// Initialise the terminal display
init_screen();
}
/*-----------------------------------------------------------------------
Function: end_program - Deinitialise program-wide functions
Arguments: (none)
Returns: (nothing)
This function finalises the terminal display, internal low-level
routines, etc.
*/
void end_program (void)
{
end_screen();
}
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