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trader/src/game.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>
$Id$
This file, game.c, contains the implementation of the starting and
ending game functions used in 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 cmp_player (const void *a, const void *b);
/************************************************************************
* Game function definitions *
************************************************************************/
/*-----------------------------------------------------------------------
Function: init_game - Initialise a new game or load an old one
Arguments: (none)
Returns: (nothing)
This function initialises all game variables and structures, either by
creating a new game or by loading an old one from disk. In particular,
if a new game is to be created, it asks how many people will play, and
what their names are. If needed, instructions on how to play the game
are also displayed.
On entry to this function, the "game_num" global variable determines
whether an old game is loaded (if possible). On exit, all global
variables in globals.h are initialised, apart from game_move[]. If the
user aborts entering the necessary information, abort_game is set to
true.
*/
void init_game (void)
{
int i, j, x, y;
int key, ret;
bool done, modified, entered[MAX_PLAYERS];
// Try to load an old game, if possible
if (game_num != 0) {
newtxwin(5, 30, LINE_OFFSET + 6, COL_CENTER(30));
wbkgd(curwin, ATTR_STATUS_WINDOW);
box(curwin, 0, 0);
center(curwin, 2, ATTR_STATUS_WINDOW, "Loading game %d... ", game_num);
wrefresh(curwin);
game_loaded = load_game(game_num);
deltxwin();
txrefresh();
}
// Initialise game data, if not already loaded
if (! game_loaded) {
number_players = 0;
while (number_players == 0) {
// Ask for the number of players
newtxwin(5, 62, LINE_OFFSET + 3, COL_CENTER(62));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
mvwaddstr(curwin, 2, 2, "Enter number of players ");
waddstr(curwin, "[");
attrpr(curwin, ATTR_KEYCODE_STR, "1");
waddstr(curwin, "-");
attrpr(curwin, ATTR_KEYCODE_STR, "%d", MAX_PLAYERS);
waddstr(curwin, "]");
waddstr(curwin, " or ");
attrpr(curwin, ATTR_KEYCODE_STR, "<C>");
waddstr(curwin, " to continue a game: ");
curs_set(CURS_ON);
wrefresh(curwin);
do {
key = toupper(gettxchar(curwin));
done = ((key >= '1') && (key <= (MAX_PLAYERS + '0'))) || (key == 'C');
switch (key) {
case KEY_ESC:
case KEY_CANCEL:
case KEY_CTRL('C'):
case KEY_CTRL('G'):
case KEY_CTRL('\\'):
abort_game = true;
return;
default:
// Do nothing
break;
}
if (! done) {
beep();
}
} while (! done);
curs_set(CURS_OFF);
wechochar(curwin, key | A_BOLD);
if (key != 'C') {
number_players = key - '0';
} else {
// Ask which game to load
newtxwin(5, 50, LINE_OFFSET + 6, COL_CENTER(50));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
mvwaddstr(curwin, 2, 2, "Enter game number ");
waddstr(curwin, "[");
attrpr(curwin, ATTR_KEYCODE_STR, "1");
waddstr(curwin, "-");
attrpr(curwin, ATTR_KEYCODE_STR, "9");
waddstr(curwin, "]");
waddstr(curwin, " or ");
attrpr(curwin, ATTR_KEYCODE_STR, "<ESC>");
waddstr(curwin, " to cancel: ");
curs_set(CURS_ON);
wrefresh(curwin);
do {
key = gettxchar(curwin);
done = (key >= '1' && key <= '9');
switch (key) {
case KEY_ESC:
case KEY_CANCEL:
case KEY_CTRL('C'):
case KEY_CTRL('G'):
case KEY_CTRL('\\'):
key = KEY_ESC;
done = true;
break;
default:
// Do nothing
break;
}
if (! done) {
beep();
}
} while (! done);
curs_set(CURS_OFF);
if (key != KEY_ESC) {
game_num = key - '0';
wechochar(curwin, key | A_BOLD);
// Try to load the game, if possible
newtxwin(5, 30, LINE_OFFSET + 9, COL_CENTER(30));
wbkgd(curwin, ATTR_STATUS_WINDOW);
box(curwin, 0, 0);
center(curwin, 2, ATTR_STATUS_WINDOW,
"Loading game %d... ", game_num);
wrefresh(curwin);
game_loaded = load_game(game_num);
deltxwin();
txrefresh();
}
deltxwin(); // "Enter game number" window
deltxwin(); // "Number of players" window
txrefresh();
}
}
if (! game_loaded) {
if (number_players == 1) {
// Ask for the player name
newtxwin(5, 76, LINE_OFFSET + 9, COL_CENTER(76));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
mvwaddstr(curwin, 2, 2, "Please enter your name: ");
player[0].name = NULL;
do {
ret = gettxstring(curwin, &player[0].name, false, 2, 26,
48, ATTR_INPUT_FIELD, NULL);
done = ((ret == OK) && (strlen(player[0].name) != 0));
if (! done) {
beep();
}
} while (! done);
newtxwin(5, 44, LINE_OFFSET + 6, COL_CENTER(44));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
mvwaddstr(curwin, 2, 2, "Do you need any instructions? ");
waddstr(curwin, "[");
attrpr(curwin, ATTR_KEYCODE_STR, "Y");
waddstr(curwin, "/");
attrpr(curwin, ATTR_KEYCODE_STR, "N");
waddstr(curwin, "] ");
if (answer_yesno(curwin)) {
show_help();
}
deltxwin(); // "Do you need instructions?" window
deltxwin(); // "Enter your name" window
deltxwin(); // "Number of players" window
txrefresh();
} else {
// Ask for all of the player names
newtxwin(number_players + 5, 76, LINE_OFFSET + 9, COL_CENTER(76));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_WINDOW_TITLE, " Enter Player Names ");
for (i = 0; i < number_players; i++) {
player[i].name = NULL;
entered[i] = false;
mvwprintw(curwin, i + 3, 2, "Player %d:", i + 1);
}
i = 0;
done = false;
while (! done) {
ret = gettxstring(curwin, &player[i].name, true, 3 + i, 12,
62, ATTR_INPUT_FIELD, &modified);
switch (ret) {
case OK:
// Make sure name is not an empty string
j = strlen(player[i].name);
entered[i] = (j != 0);
if (j == 0) {
beep();
}
// Make sure name has not been entered already
for (j = 0; j < number_players; j++) {
if ((i != j) && (player[j].name != NULL) &&
(strcmp(player[i].name, player[j].name) == 0)) {
entered[i] = false;
beep();
break;
}
}
// Move to first name for which ENTER has not been pressed
done = true;
for (i = 0; i < number_players; i++) {
if (! entered[i]) {
done = false;
break;
}
}
break;
case ERR:
beep();
break;
case KEY_UP:
if (modified) {
entered[i] = false;
}
if (i == 0) {
i = number_players - 1;
} else {
i--;
}
break;
case KEY_DOWN:
if (modified) {
entered[i] = false;
}
if (i == number_players - 1) {
i = 0;
} else {
i++;
}
break;
default:
beep();
break;
}
}
newtxwin(5, 50, LINE_OFFSET + 6, COL_CENTER(50));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
mvwaddstr(curwin, 2, 2, "Does any player need instructions? ");
waddstr(curwin, "[");
attrpr(curwin, ATTR_KEYCODE_STR, "Y");
waddstr(curwin, "/");
attrpr(curwin, ATTR_KEYCODE_STR, "N");
waddstr(curwin, "] ");
if (answer_yesno(curwin)) {
show_help();
}
deltxwin(); // "Need instructions?" window
deltxwin(); // "Enter player names" window
deltxwin(); // "Number of players" window
txrefresh();
}
// Initialise player data (other than names)
for (i = 0; i < number_players; i++) {
player[i].cash = INITIAL_CASH;
player[i].debt = 0.0;
player[i].in_game = true;
for (j = 0; j < MAX_COMPANIES; j++) {
player[i].stock_owned[j] = 0;
}
}
// Initialise company data
for (i = 0; i < MAX_COMPANIES; i++) {
company[i].name = company_name[i];
company[i].share_price = 0.0;
company[i].share_return = INITIAL_RETURN;
company[i].stock_issued = 0;
company[i].max_stock = 0;
company[i].on_map = false;
}
// Initialise galaxy map
for (x = 0; x < MAX_X; x++) {
for (y = 0; y < MAX_Y; y++) {
galaxy_map[x][y] = (randf() < STAR_RATIO) ?
MAP_STAR : MAP_EMPTY;
}
}
// Miscellaneous initialisation
interest_rate = INITIAL_INTEREST_RATE;
max_turn = DEFAULT_MAX_TURN;
turn_number = 1;
// Select who is to go first
if (number_players == 1) {
first_player = 0;
current_player = 0;
} else {
first_player = randi(number_players);
current_player = first_player;
newtxwin(7, 50, LINE_OFFSET + 8, COL_CENTER(50));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
center(curwin, 2, ATTR_NORMAL_WINDOW,
"The first player to go is");
center(curwin, 3, ATTR_HIGHLIGHT_STR, "%s",
player[first_player].name);
wait_for_key(curwin, 5, ATTR_WAITNORMAL_STR);
deltxwin();
txrefresh();
}
}
}
quit_selected = false;
abort_game = false;
}
/*-----------------------------------------------------------------------
Function: end_game - Finish playing the current game
Arguments: (none)
Returns: (nothing)
This function displays every player's status before declaring the
winner of the game. Note that turn_number is used instead of max_turns
as select_moves() may terminate the game earlier.
*/
void end_game (void)
{
int i;
char *buf;
if (abort_game) {
// init_game() was cancelled by user
return;
}
buf = malloc(BUFSIZE);
if (buf == NULL) {
err_exit("out of memory");
}
newtxwin(7, 40, LINE_OFFSET + 9, COL_CENTER(40));
wbkgd(curwin, ATTR_ERROR_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_ERROR_TITLE, " Game Over ");
center(curwin, 3, ATTR_ERROR_STR, "The game is over after %d turns",
turn_number - 1);
wait_for_key(curwin, 5, ATTR_WAITERROR_STR);
deltxwin();
for (i = 0; i < number_players; i++) {
show_status(i);
}
if (number_players == 1) {
strfmon(buf, BUFSIZE, "%1n", total_value(0));
newtxwin(9, 60, LINE_OFFSET + 8, COL_CENTER(60));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_WINDOW_TITLE, " Total Value ");
center2(curwin, 4, ATTR_NORMAL_WINDOW, ATTR_HIGHLIGHT_STR,
"Your total value was ", "%s", buf);
wait_for_key(curwin, 7, ATTR_WAITNORMAL_STR);
deltxwin();
} else {
// Handle the locale's currency symbol
struct lconv *lc = localeconv();
assert(lc != NULL);
// Sort players on the basis of total value
for (i = 0; i < number_players; i++) {
player[i].sort_value = total_value(i);
}
qsort(player, number_players, sizeof(player_info_t), cmp_player);
newtxwin(number_players + 10, 76, LINE_OFFSET + 3, COL_CENTER(76));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_WINDOW_TITLE, " Game Winner ");
center2(curwin, 3, ATTR_NORMAL_WINDOW, ATTR_HIGHLIGHT_STR,
"The winner is ", "%s", player[0].name);
if (player[0].sort_value == 0.0) {
center2(curwin, 4, ATTR_NORMAL_WINDOW, ATTR_STANDOUT_STR,
"who is ", "%s", "*** BANKRUPT ***");
} else {
strfmon(buf, BUFSIZE, "%1n", player[0].sort_value);
center2(curwin, 4, ATTR_NORMAL_WINDOW, ATTR_HIGHLIGHT_STR,
"with a value of ", "%s", buf);
}
snprintf(buf, BUFSIZE, "Total Value (%s)", lc->currency_symbol);
int w = getmaxx(curwin) - 33;
wattrset(curwin, ATTR_WINDOW_SUBTITLE);
mvwprintw(curwin, 6, 2, "%5s %-*.*s %18s ", "", w, w, "Player", buf);
wattrset(curwin, ATTR_NORMAL_WINDOW);
for (i = 0; i < number_players; i++) {
strfmon(buf, BUFSIZE, "%!18n", player[i].sort_value);
mvwprintw(curwin, i + 7, 2, "%5s %-*.*s %18s ",
ordinal[i + 1], w, w, player[i].name, buf);
}
wait_for_key(curwin, getmaxy(curwin) - 2, ATTR_WAITNORMAL_STR);
deltxwin();
}
free(buf);
}
/*-----------------------------------------------------------------------
Function: show_map - Display the galaxy map on the screen
Arguments: closewin - Wait for user, then close window if true
Returns: (nothing)
This function displays the galaxy map on the screen. It uses the
galaxy_map[][] global variable. If closewin is true, a prompt is shown
for the user to press any key; the map window is then closed. If
closewin is false, no prompt is shown and the text window must be
closed by the caller.
*/
void show_map (bool closewin)
{
int n, x, y;
newtxwin(MAX_Y + 4, WIN_COLS, LINE_OFFSET + 1, COL_CENTER(WIN_COLS));
wbkgd(curwin, ATTR_MAP_WINDOW);
// Draw various borders
box(curwin, 0, 0);
mvwaddch(curwin, 2, 0, ACS_LTEE);
whline(curwin, ACS_HLINE, getmaxx(curwin) - 2);
mvwaddch(curwin, 2, getmaxx(curwin) - 1, ACS_RTEE);
// Display current player and turn number
wattrset(curwin, ATTR_MAP_TITLE);
mvwaddstr(curwin, 1, 2, " ");
waddstr(curwin, "Player: ");
n = getmaxx(curwin) - getcurx(curwin) - 4;
wattrset(curwin, ATTR_MAP_T_HIGHLIGHT);
wprintw(curwin, "%-*.*s", n, n, player[current_player].name);
wattrset(curwin, ATTR_MAP_TITLE);
waddstr(curwin, " ");
if (turn_number != max_turn) {
const char *initial = "Turn: ";
char *buf = malloc(BUFSIZE);
if (buf == NULL) {
err_exit("out of memory");
}
int len1 = strlen(initial);
int len2 = snprintf(buf, BUFSIZE, "%d", turn_number);
mvwaddstr(curwin, 1, getmaxx(curwin) - (len1 + len2) - 6, " ");
waddstr(curwin, initial);
wattrset(curwin, ATTR_MAP_T_HIGHLIGHT);
waddstr(curwin, buf);
wattrset(curwin, ATTR_MAP_TITLE);
waddstr(curwin, " ");
free(buf);
} else {
const char *buf = "*** Last Turn ***";
int len = strlen(buf);
mvwaddstr(curwin, 1, getmaxx(curwin) - len - 6, " ");
wattrset(curwin, ATTR_MAP_T_STANDOUT);
waddstr(curwin, buf);
wattrset(curwin, ATTR_MAP_TITLE);
waddstr(curwin, " ");
}
wattrset(curwin, ATTR_MAP_WINDOW);
// Display the actual map
for (y = 0; y < MAX_Y; y++) {
wmove(curwin, y + 3, 2);
for (x = 0; x < MAX_X; x++) {
map_val_t m = galaxy_map[x][y];
switch (m) {
case MAP_EMPTY:
waddch(curwin, PRINTABLE_MAP_VAL(m) | ATTR_MAP_EMPTY);
break;
case MAP_OUTPOST:
waddch(curwin, PRINTABLE_MAP_VAL(m) | ATTR_MAP_OUTPOST);
break;
case MAP_STAR:
waddch(curwin, PRINTABLE_MAP_VAL(m) | ATTR_MAP_STAR);
break;
default:
waddch(curwin, PRINTABLE_MAP_VAL(m) | ATTR_MAP_COMPANY);
break;
}
waddch(curwin, ' ' | ATTR_MAP_EMPTY);
}
}
if (closewin) {
// Wait for the user to press any key
wrefresh(curwin);
newtxwin(WIN_LINES - MAX_Y - 5, WIN_COLS,
LINE_OFFSET + MAX_Y + 5, COL_CENTER(WIN_COLS));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
wait_for_key(curwin, 2, ATTR_WAITNORMAL_STR);
deltxwin(); // Wait for key window
deltxwin(); // Galaxy map window
txrefresh();
} else {
// Window must be closed by the caller
wrefresh(curwin);
}
}
/*-----------------------------------------------------------------------
Function: show_status - Display the player's status
Arguments: num - Player number (0 to number_players - 1)
Returns: (nothing)
This function displays the financial status of the player num. It uses
the player[num] global variable. The show status window is closed
before returning from this function.
*/
void show_status (int num)
{
double val;
int i, line;
assert(num >= 0 && num < number_players);
newtxwin(MAX_COMPANIES + 15, 80, LINE_OFFSET + 1, COL_CENTER(80));
wbkgd(curwin, ATTR_NORMAL_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_WINDOW_TITLE, " Stock Portfolio ");
center2(curwin, 2, ATTR_NORMAL_WINDOW, ATTR_HIGHLIGHT_STR, "Player: ",
"%s", player[num].name);
val = total_value(num);
if (val == 0.0) {
center(curwin, 11, ATTR_STANDOUT_STR, "* * * B A N K R U P T * * *");
} else {
char *buf = malloc(BUFSIZE);
if (buf == NULL) {
err_exit("out of memory");
}
// Check to see if any companies are on the map
bool none = true;
for (i = 0; i < MAX_COMPANIES; i++) {
if (company[i].on_map) {
none = false;
break;
}
}
if (none) {
center(curwin, 8, ATTR_NORMAL_WINDOW, "No companies on the map");
} else {
// Handle the locale's currency symbol
struct lconv *lc = localeconv();
assert(lc != NULL);
snprintf(buf, BUFSIZE, "share (%s)", lc->currency_symbol);
wattrset(curwin, ATTR_WINDOW_SUBTITLE);
mvwprintw(curwin, 4, 2, " %-22s %12s %10s %10s %10s ",
"", "Price per", "", "Holdings", "Company");
mvwprintw(curwin, 5, 2, " %-22s %12s %10s %10s %10s ",
"Company", buf, "Return (%)", "(shares)", "owner (%)");
wattrset(curwin, ATTR_NORMAL_WINDOW);
for (line = 6, i = 0; i < MAX_COMPANIES; i++) {
if (company[i].on_map) {
strfmon(buf, BUFSIZE, "%!12n", company[i].share_price);
mvwprintw(curwin, line, 2,
" %-22s %10s %10.2f %'10ld %10.2f ",
company[i].name, buf,
company[i].share_return * 100.0,
player[num].stock_owned[i],
(company[i].stock_issued == 0) ? 0.0 :
((double) player[num].stock_owned[i] * 100.0) /
company[i].stock_issued);
line++;
}
}
}
line = 15;
strfmon(buf, BUFSIZE, "%18n", player[num].cash);
center2(curwin, line++, ATTR_NORMAL_WINDOW, ATTR_HIGHLIGHT_STR,
"Current cash: ", " %s ", buf);
if (player[num].debt != 0.0) {
strfmon(buf, BUFSIZE, "%18n", player[num].debt);
center2(curwin, line++, ATTR_NORMAL_WINDOW, ATTR_HIGHLIGHT_STR,
"Current debt: ", " %s ", buf);
center2(curwin, line++, ATTR_NORMAL_WINDOW, ATTR_HIGHLIGHT_STR,
"Interest rate: ", " %17.2f%% ", interest_rate * 100.0);
}
strfmon(buf, BUFSIZE, "%18n", val);
center2(curwin, line + 1, ATTR_HIGHLIGHT_STR, ATTR_WINDOW_TITLE,
"Total value: ", " %s ", buf);
free(buf);
}
wait_for_key(curwin, 21, ATTR_WAITNORMAL_STR);
deltxwin();
txrefresh();
}
/*-----------------------------------------------------------------------
Function: total_value - Calculate a player's total worth
Arguments: num - Player number (0 to number_players - 1)
Returns: (nothing)
This function calculates the total value (worth) of the player num.
*/
double total_value (int num)
{
double val;
int i;
assert(num >= 0 && num < number_players);
val = player[num].cash - player[num].debt;
for (i = 0; i < MAX_COMPANIES; i++) {
if (company[i].on_map) {
val += player[num].stock_owned[i] * company[i].share_price;
}
}
return val;
}
/*-----------------------------------------------------------------------
Function: cmp_player - Compare two player[] elements
Arguments: a, b - Elements to compare
Returns: int - Comparison of a and b
This function compares two player[] elements (of type player_info_t) on
the basis of total value, and returns -1 if a > b, 0 if a == b and 1 if
a < b (note the change from the usual order!). It is used for sorting
players into descending total value order. Note that the sort_value
field MUST be computed before calling qsort()!
*/
int cmp_player (const void *a, const void *b)
{
const player_info_t *aa = (const player_info_t *) a;
const player_info_t *bb = (const player_info_t *) b;
if (aa->sort_value > bb->sort_value) {
return -1;
} else if (aa->sort_value < bb->sort_value) {
return 1;
} else {
return 0;
}
}
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