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Move game_load() and game_save() functions to their own source file

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This commit is contained in:
John Zaitseff 2011-07-16 09:58:53 +10:00
parent 36c9a57db0
commit dd40b94301
7 changed files with 505 additions and 426 deletions
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1
src/Makefile.am
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@ -33,6 +33,7 @@ trader_SOURCES = \
trader.c trader.h \
globals.c globals.h \
game.c game.h \
fileio.c fileio.h \
help.c help.h \
intf.c intf.h \
utils.c utils.h \

28
src/README
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@ -8,16 +8,18 @@
This directory, "src", contains the main source code to Star Traders. The
source code is split up among the following files:
trader.h - Main program header file
trader.c - Main program, command-line interface
system.h - All system header files are included here
globals.h - Global game constants and variables
globals.c - Global game variables
game.h - Game functions header file
game.c - Game functions for Star Traders
help.h - Help text routines header file
help.c - Help text routines: how to play Star Traders
intf.h - Basic text input/output header file
intf.c - Basic text input/output routines
utils.h - Utility functions header file
utils.c - Utility functions needed by Star Traders
trader.h - Main program header file
trader.c - Main program, command-line interface
system.h - All system header files are included here
globals.h - Global game constants and variables
globals.c - Global game variable definitions
game.h - Game starting and ending routines header file
game.c - Game starting and ending routines for Star Traders
fileio.h - Load and save game file routines header file
fileio.c - Load and save game file routines
help.h - Help text routines header file
help.c - Help text routines: how to play Star Traders
intf.h - Basic text input/output header file
intf.c - Basic text input/output routines
utils.h - Utility functions header file
utils.c - Utility functions needed by Star Traders

441
src/fileio.c Normal file
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@ -0,0 +1,441 @@
/************************************************************************
* *
* Star Traders: A Game of Interstellar Trading *
* Copyright (C) 1990-2011, John Zaitseff *
* *
************************************************************************/
/*
Author: John Zaitseff <J.Zaitseff@zap.org.au>
$Id$
This file, fileio.c, contains the implementation of the game load and
save 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"
/************************************************************************
* Module constants and macros *
************************************************************************/
// Game loading and saving constants
static const int game_file_crypt_key[] = {
0x50, 0x52, 0x55, 0x59, 0x5A, 0x5C, 0x5F,
0x90, 0x92, 0x95, 0x99, 0x9A, 0x9C, 0x9F,
0xA0, 0xA2, 0xA5, 0xA9, 0xAA, 0xAC, 0xAF,
0xD0, 0xD2, 0xD5, 0xD9, 0xDA, 0xDC, 0xDF
};
#define GAME_FILE_CRYPT_KEY_SIZE (sizeof(game_file_crypt_key) / sizeof(int))
// Macros used in load_game()
#define load_game_scanf(_fmt, _var, _cond) \
do { \
if (fgets(buf, BUFSIZE, file) == NULL) { \
err_exit("%s: missing field on line %d", filename, lineno); \
} \
if (sscanf(unscramble(crypt_key, buf, BUFSIZE), _fmt "\n", \
&(_var)) != 1) { \
err_exit("%s: illegal field on line %d: `%s'", \
filename, lineno, buf); \
} \
if (! (_cond)) { \
err_exit("%s: illegal value on line %d: `%s'", \
filename, lineno, buf); \
} \
lineno++; \
} while (0)
#define load_game_read_int(_var, _cond) \
load_game_scanf("%d", _var, _cond)
#define load_game_read_long(_var, _cond) \
load_game_scanf("%ld", _var, _cond)
#define load_game_read_double(_var, _cond) \
load_game_scanf("%lf", _var, _cond)
#define load_game_read_bool(_var) \
do { \
int b; \
\
load_game_scanf("%d", b, (b == false) || (b == true)); \
(_var) = b; \
} while (0)
#define load_game_read_string(_var) \
do { \
char *s; \
int len; \
\
if (fgets(buf, BUFSIZE, file) == NULL) { \
err_exit("%s: missing field on line %d", filename, lineno); \
} \
if (strlen(unscramble(crypt_key, buf, BUFSIZE)) == 0) { \
err_exit("%s: illegal value on line %d", filename, lineno); \
} \
lineno++; \
\
s = malloc(strlen(buf) + 1); \
if (s == NULL) { \
err_exit("out of memory"); \
} \
\
strcpy(s, buf); \
len = strlen(s); \
if (len > 0 && s[len - 1] == '\n') { \
s[len - 1] = '\0'; \
} \
\
(_var) = s; \
} while (0)
// Macros used in save_game()
#define save_game_printf(_fmt, _var) \
do { \
snprintf(buf, BUFSIZE, _fmt "\n", _var); \
scramble(crypt_key, buf, BUFSIZE); \
fprintf(file, "%s", buf); \
} while (0)
#define save_game_write_int(_var) \
save_game_printf("%d", _var)
#define save_game_write_long(_var) \
save_game_printf("%ld", _var)
#define save_game_write_double(_var) \
save_game_printf("%2.20e", _var)
#define save_game_write_bool(_var) \
save_game_printf("%d", (int) _var)
#define save_game_write_string(_var) \
save_game_printf("%s", _var)
/************************************************************************
* Game load and save function definitions *
************************************************************************/
/*-----------------------------------------------------------------------
Function: load_game - Load a saved game from disk
Arguments: num - Game number to load (1-9)
Returns: bool - True if game loaded successfully, else false
This function loads a previously-saved game from disk. True is
returned if this could be done successfully.
*/
bool load_game (int num)
{
char *buf, *filename;
FILE *file;
int saved_errno, lineno;
int crypt_key;
int n, i, j, x, y;
char c;
assert((num >= 1) && (num <= 9));
buf = malloc(BUFSIZE);
if (buf == NULL) {
err_exit("out of memory");
}
filename = game_filename(num);
assert(filename != NULL);
file = fopen(filename, "r");
if (file == NULL) {
// File could not be opened
if (errno == ENOENT) {
// File not found
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 Not Found ");
center(curwin, 3, ATTR_ERROR_STR,
"Game %d has not been saved to disk", num);
wait_for_key(curwin, 5, ATTR_WAITERROR_STR);
deltxwin();
} else {
// Some other file error
saved_errno = errno;
newtxwin(9, 70, LINE_OFFSET + 9, COL_CENTER(70));
wbkgd(curwin, ATTR_ERROR_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_ERROR_TITLE, " Game Not Loaded ");
center(curwin, 3, ATTR_ERROR_STR,
"Game %d could not be loaded from disk", num);
center(curwin, 5, ATTR_ERROR_WINDOW, "File %s: %s", filename,
strerror(saved_errno));
wait_for_key(curwin, 7, ATTR_WAITERROR_STR);
deltxwin();
}
free(buf);
free(filename);
return false;
}
// Read the game file header
if (fgets(buf, BUFSIZE, file) == NULL) {
err_exit("%s: missing header in game file", filename);
}
if (strcmp(buf, GAME_FILE_HEADER "\n") != 0) {
err_exit("%s: not a valid game file", filename);
}
if (fgets(buf, BUFSIZE, file) == NULL) {
err_exit("%s: missing subheader in game file", filename);
}
if (strcmp(buf, GAME_FILE_API_VERSION "\n") != 0) {
err_exit("%s: saved under a different version of Star Traders",
filename);
}
lineno = 3;
// Read in the game file encryption key
if (fscanf(file, "%i\n", &crypt_key) != 1) {
err_exit("%s: illegal or missing field on line %d", filename, lineno);
}
lineno++;
// Read in various game variables
load_game_read_int(n, n == MAX_X);
load_game_read_int(n, n == MAX_Y);
load_game_read_int(max_turn, max_turn >= 1);
load_game_read_int(turn_number, (turn_number >= 1) && (turn_number <= max_turn));
load_game_read_int(number_players, (number_players >= 1) && (number_players < MAX_PLAYERS));
load_game_read_int(current_player, (current_player >= 0) && (current_player < number_players));
load_game_read_int(first_player, (first_player >= 0) && (first_player < number_players));
load_game_read_int(n, n == MAX_COMPANIES);
load_game_read_double(interest_rate, interest_rate > 0.0);
// Read in player data
for (i = 0; i < number_players; i++) {
load_game_read_string(player[i].name);
load_game_read_double(player[i].cash, player[i].cash >= 0.0);
load_game_read_double(player[i].debt, player[i].debt >= 0.0);
load_game_read_bool(player[i].in_game);
for (j = 0; j < MAX_COMPANIES; j++) {
load_game_read_long(player[i].stock_owned[j], player[i].stock_owned[j] >= 0);
}
}
// Read in company data
for (i = 0; i < MAX_COMPANIES; i++) {
company[i].name = company_name[i];
load_game_read_double(company[i].share_price, company[i].share_price > 0.0);
load_game_read_double(company[i].share_return, true);
load_game_read_long(company[i].stock_issued, company[i].stock_issued >= 0);
load_game_read_long(company[i].max_stock, company[i].max_stock >= 0);
load_game_read_bool(company[i].on_map);
}
// Read in galaxy map
for (x = 0; x < MAX_X; x++) {
if (fgets(buf, BUFSIZE, file) == NULL) {
err_exit("%s: missing field on line %d", filename, lineno);
}
if (strlen(unscramble(crypt_key, buf, BUFSIZE)) != (MAX_Y + 1)) {
err_exit("%s: illegal field on line %d", filename, lineno);
}
lineno++;
for (y = 0; y < MAX_Y; y++) {
c = buf[y];
if ((c == MAP_EMPTY) || (c == MAP_OUTPOST) || (c == MAP_STAR) ||
((c >= MAP_A) && (c <= MAP_LAST))) {
galaxy_map[x][y] = (map_val_t) c;
} else {
err_exit("%s: illegal value on line %d", filename, lineno - 1);
}
}
}
// Read in a dummy sentinal value
load_game_read_int(n, n == GAME_FILE_SENTINEL);
if (fclose(file) == EOF) {
errno_exit("%s", filename);
}
free(buf);
free(filename);
return true;
}
/*-----------------------------------------------------------------------
Function: save_game - Save the current game to disk
Arguments: num - Game number to use (1-9)
Returns: bool - True if game saved successfully, else false
This function saves the current game to disk. True is returned if this
could be done successfully.
*/
bool save_game (int num)
{
const char *data_dir;
char *buf, *filename;
FILE *file;
int saved_errno;
struct stat statbuf;
int crypt_key;
int i, j, x, y;
char *p;
assert((num >= 1) && (num <= 9));
buf = malloc(BUFSIZE);
if (buf == NULL) {
err_exit("out of memory");
}
crypt_key = game_file_crypt_key[randi(GAME_FILE_CRYPT_KEY_SIZE)];
// Create the data directory, if needed
data_dir = data_directory();
if (data_dir != NULL) {
if (mkdir(data_dir, S_IRWXU | S_IRWXG | S_IRWXO) != 0) {
saved_errno = errno;
if ((saved_errno == EEXIST) && (stat(data_dir, &statbuf) == 0)
&& S_ISDIR(statbuf.st_mode)) {
; // Do nothing: directory already exists
} else {
// Data directory could not be created
newtxwin(9, 70, LINE_OFFSET + 9, COL_CENTER(70));
wbkgd(curwin, ATTR_ERROR_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_ERROR_TITLE, " Game Not Saved ");
center(curwin, 3, ATTR_ERROR_STR,
"Game %d could not be saved to disk", num);
center(curwin, 5, ATTR_ERROR_WINDOW, "Directory %s: %s",
data_dir, strerror(saved_errno));
wait_for_key(curwin, 7, ATTR_WAITERROR_STR);
deltxwin();
free(buf);
return false;
}
}
}
filename = game_filename(num);
assert(filename != NULL);
file = fopen(filename, "w");
if (file == NULL) {
// File could not be opened for writing
saved_errno = errno;
newtxwin(9, 70, LINE_OFFSET + 9, COL_CENTER(70));
wbkgd(curwin, ATTR_ERROR_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_ERROR_TITLE, " Game Not Saved ");
center(curwin, 3, ATTR_ERROR_STR,
"Game %d could not be saved to disk", num);
center(curwin, 5, ATTR_ERROR_WINDOW, "File %s: %s", filename,
strerror(saved_errno));
wait_for_key(curwin, 7, ATTR_WAITERROR_STR);
deltxwin();
free(buf);
free(filename);
return false;
}
// Write out the game file header and encryption key
fprintf(file, "%s\n" "%s\n", GAME_FILE_HEADER, GAME_FILE_API_VERSION);
fprintf(file, "%d\n", crypt_key);
// Write out various game variables
save_game_write_int(MAX_X);
save_game_write_int(MAX_Y);
save_game_write_int(max_turn);
save_game_write_int(turn_number);
save_game_write_int(number_players);
save_game_write_int(current_player);
save_game_write_int(first_player);
save_game_write_int(MAX_COMPANIES);
save_game_write_double(interest_rate);
// Write out player data
for (i = 0; i < number_players; i++) {
save_game_write_string(player[i].name);
save_game_write_double(player[i].cash);
save_game_write_double(player[i].debt);
save_game_write_bool(player[i].in_game);
for (j = 0; j < MAX_COMPANIES; j++) {
save_game_write_long(player[i].stock_owned[j]);
}
}
// Write out company data
for (i = 0; i < MAX_COMPANIES; i++) {
save_game_write_double(company[i].share_price);
save_game_write_double(company[i].share_return);
save_game_write_long(company[i].stock_issued);
save_game_write_long(company[i].max_stock);
save_game_write_bool(company[i].on_map);
}
// Write out galaxy map
for (x = 0; x < MAX_X; x++) {
memset(buf, 0, MAX_Y + 2);
for (p = buf, y = 0; y < MAX_Y; p++, y++) {
*p = (char) galaxy_map[x][y];
}
*p++ = '\n';
*p = '\0';
scramble(crypt_key, buf, BUFSIZE);
fprintf(file, "%s", buf);
}
// Write out a dummy sentinal value
save_game_write_int(GAME_FILE_SENTINEL);
if (fclose(file) == EOF) {
errno_exit("%s", filename);
}
free(buf);
free(filename);
return true;
}

43
src/fileio.h Normal file
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@ -0,0 +1,43 @@
/************************************************************************
* *
* Star Traders: A Game of Interstellar Trading *
* Copyright (C) 1990-2011, John Zaitseff *
* *
************************************************************************/
/*
Author: John Zaitseff <J.Zaitseff@zap.org.au>
$Id$
This file, fileio.h, contains declarations for the load and save 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/.
*/
#ifndef included_FILEIO_H
#define included_FILEIO_H 1
/************************************************************************
* Game load and save function declarations *
************************************************************************/
extern bool load_game (int num);
extern bool save_game (int num);
#endif /* included_FILEIO_H */

410
src/game.c
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@ -9,8 +9,8 @@
Author: John Zaitseff <J.Zaitseff@zap.org.au>
$Id$
This file, game.c, contains the implementation of the game functions
used in Star Traders.
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
@ -31,105 +31,6 @@
#include "trader.h"
/************************************************************************
* Module constants and macros *
************************************************************************/
// Game loading and saving constants
static const int game_file_crypt_key[] = {
0x50, 0x52, 0x55, 0x59, 0x5A, 0x5C, 0x5F,
0x90, 0x92, 0x95, 0x99, 0x9A, 0x9C, 0x9F,
0xA0, 0xA2, 0xA5, 0xA9, 0xAA, 0xAC, 0xAF,
0xD0, 0xD2, 0xD5, 0xD9, 0xDA, 0xDC, 0xDF
};
#define GAME_FILE_CRYPT_KEY_SIZE (sizeof(game_file_crypt_key) / sizeof(int))
// Macros used in load_game()
#define load_game_scanf(_fmt, _var, _cond) \
do { \
if (fgets(buf, BUFSIZE, file) == NULL) { \
err_exit("%s: missing field on line %d", filename, lineno); \
} \
if (sscanf(unscramble(crypt_key, buf, BUFSIZE), _fmt "\n", \
&(_var)) != 1) { \
err_exit("%s: illegal field on line %d: `%s'", \
filename, lineno, buf); \
} \
if (! (_cond)) { \
err_exit("%s: illegal value on line %d: `%s'", \
filename, lineno, buf); \
} \
lineno++; \
} while (0)
#define load_game_read_int(_var, _cond) \
load_game_scanf("%d", _var, _cond)
#define load_game_read_long(_var, _cond) \
load_game_scanf("%ld", _var, _cond)
#define load_game_read_double(_var, _cond) \
load_game_scanf("%lf", _var, _cond)
#define load_game_read_bool(_var) \
do { \
int b; \
\
load_game_scanf("%d", b, (b == false) || (b == true)); \
(_var) = b; \
} while (0)
#define load_game_read_string(_var) \
do { \
char *s; \
int len; \
\
if (fgets(buf, BUFSIZE, file) == NULL) { \
err_exit("%s: missing field on line %d", filename, lineno); \
} \
if (strlen(unscramble(crypt_key, buf, BUFSIZE)) == 0) { \
err_exit("%s: illegal value on line %d", filename, lineno); \
} \
lineno++; \
\
s = malloc(strlen(buf) + 1); \
if (s == NULL) { \
err_exit("out of memory"); \
} \
\
strcpy(s, buf); \
len = strlen(s); \
if (len > 0 && s[len - 1] == '\n') { \
s[len - 1] = '\0'; \
} \
\
(_var) = s; \
} while (0)
// Macros used in save_game()
#define save_game_printf(_fmt, _var) \
do { \
snprintf(buf, BUFSIZE, _fmt "\n", _var); \
scramble(crypt_key, buf, BUFSIZE); \
fprintf(file, "%s", buf); \
} while (0)
#define save_game_write_int(_var) \
save_game_printf("%d", _var)
#define save_game_write_long(_var) \
save_game_printf("%ld", _var)
#define save_game_write_double(_var) \
save_game_printf("%2.20e", _var)
#define save_game_write_bool(_var) \
save_game_printf("%d", (int) _var)
#define save_game_write_string(_var) \
save_game_printf("%s", _var)
/************************************************************************
* Internal function declarations *
************************************************************************/
@ -588,313 +489,6 @@ void end_game (void)
}
/*-----------------------------------------------------------------------
Function: load_game - Load a saved game from disk
Arguments: num - Game number to load (1-9)
Returns: bool - True if game loaded successfully, else false
This function loads a previously-saved game from disk. True is
returned if this could be done successfully.
*/
bool load_game (int num)
{
char *buf, *filename;
FILE *file;
int saved_errno, lineno;
int crypt_key;
int n, i, j, x, y;
char c;
assert((num >= 1) && (num <= 9));
buf = malloc(BUFSIZE);
if (buf == NULL) {
err_exit("out of memory");
}
filename = game_filename(num);
assert(filename != NULL);
file = fopen(filename, "r");
if (file == NULL) {
// File could not be opened
if (errno == ENOENT) {
// File not found
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 Not Found ");
center(curwin, 3, ATTR_ERROR_STR,
"Game %d has not been saved to disk", num);
wait_for_key(curwin, 5, ATTR_WAITERROR_STR);
deltxwin();
} else {
// Some other file error
saved_errno = errno;
newtxwin(9, 70, LINE_OFFSET + 9, COL_CENTER(70));
wbkgd(curwin, ATTR_ERROR_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_ERROR_TITLE, " Game Not Loaded ");
center(curwin, 3, ATTR_ERROR_STR,
"Game %d could not be loaded from disk", num);
center(curwin, 5, ATTR_ERROR_WINDOW, "File %s: %s", filename,
strerror(saved_errno));
wait_for_key(curwin, 7, ATTR_WAITERROR_STR);
deltxwin();
}
free(buf);
free(filename);
return false;
}
// Read the game file header
if (fgets(buf, BUFSIZE, file) == NULL) {
err_exit("%s: missing header in game file", filename);
}
if (strcmp(buf, GAME_FILE_HEADER "\n") != 0) {
err_exit("%s: not a valid game file", filename);
}
if (fgets(buf, BUFSIZE, file) == NULL) {
err_exit("%s: missing subheader in game file", filename);
}
if (strcmp(buf, GAME_FILE_API_VERSION "\n") != 0) {
err_exit("%s: saved under a different version of Star Traders",
filename);
}
lineno = 3;
// Read in the game file encryption key
if (fscanf(file, "%i\n", &crypt_key) != 1) {
err_exit("%s: illegal or missing field on line %d", filename, lineno);
}
lineno++;
// Read in various game variables
load_game_read_int(n, n == MAX_X);
load_game_read_int(n, n == MAX_Y);
load_game_read_int(max_turn, max_turn >= 1);
load_game_read_int(turn_number, (turn_number >= 1) && (turn_number <= max_turn));
load_game_read_int(number_players, (number_players >= 1) && (number_players < MAX_PLAYERS));
load_game_read_int(current_player, (current_player >= 0) && (current_player < number_players));
load_game_read_int(first_player, (first_player >= 0) && (first_player < number_players));
load_game_read_int(n, n == MAX_COMPANIES);
load_game_read_double(interest_rate, interest_rate > 0.0);
// Read in player data
for (i = 0; i < number_players; i++) {
load_game_read_string(player[i].name);
load_game_read_double(player[i].cash, player[i].cash >= 0.0);
load_game_read_double(player[i].debt, player[i].debt >= 0.0);
load_game_read_bool(player[i].in_game);
for (j = 0; j < MAX_COMPANIES; j++) {
load_game_read_long(player[i].stock_owned[j], player[i].stock_owned[j] >= 0);
}
}
// Read in company data
for (i = 0; i < MAX_COMPANIES; i++) {
company[i].name = company_name[i];
load_game_read_double(company[i].share_price, company[i].share_price > 0.0);
load_game_read_double(company[i].share_return, true);
load_game_read_long(company[i].stock_issued, company[i].stock_issued >= 0);
load_game_read_long(company[i].max_stock, company[i].max_stock >= 0);
load_game_read_bool(company[i].on_map);
}
// Read in galaxy map
for (x = 0; x < MAX_X; x++) {
if (fgets(buf, BUFSIZE, file) == NULL) {
err_exit("%s: missing field on line %d", filename, lineno);
}
if (strlen(unscramble(crypt_key, buf, BUFSIZE)) != (MAX_Y + 1)) {
err_exit("%s: illegal field on line %d", filename, lineno);
}
lineno++;
for (y = 0; y < MAX_Y; y++) {
c = buf[y];
if ((c == MAP_EMPTY) || (c == MAP_OUTPOST) || (c == MAP_STAR) ||
((c >= MAP_A) && (c <= MAP_LAST))) {
galaxy_map[x][y] = (map_val_t) c;
} else {
err_exit("%s: illegal value on line %d", filename, lineno - 1);
}
}
}
// Read in a dummy sentinal value
load_game_read_int(n, n == GAME_FILE_SENTINEL);
if (fclose(file) == EOF) {
errno_exit("%s", filename);
}
free(buf);
free(filename);
return true;
}
/*-----------------------------------------------------------------------
Function: save_game - Save the current game to disk
Arguments: num - Game number to use (1-9)
Returns: bool - True if game saved successfully, else false
This function saves the current game to disk. True is returned if this
could be done successfully.
*/
bool save_game (int num)
{
const char *data_dir;
char *buf, *filename;
FILE *file;
int saved_errno;
struct stat statbuf;
int crypt_key;
int i, j, x, y;
char *p;
assert((num >= 1) && (num <= 9));
buf = malloc(BUFSIZE);
if (buf == NULL) {
err_exit("out of memory");
}
crypt_key = game_file_crypt_key[randi(GAME_FILE_CRYPT_KEY_SIZE)];
// Create the data directory, if needed
data_dir = data_directory();
if (data_dir != NULL) {
if (mkdir(data_dir, S_IRWXU | S_IRWXG | S_IRWXO) != 0) {
saved_errno = errno;
if ((saved_errno == EEXIST) && (stat(data_dir, &statbuf) == 0)
&& S_ISDIR(statbuf.st_mode)) {
; // Do nothing: directory already exists
} else {
// Data directory could not be created
newtxwin(9, 70, LINE_OFFSET + 9, COL_CENTER(70));
wbkgd(curwin, ATTR_ERROR_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_ERROR_TITLE, " Game Not Saved ");
center(curwin, 3, ATTR_ERROR_STR,
"Game %d could not be saved to disk", num);
center(curwin, 5, ATTR_ERROR_WINDOW, "Directory %s: %s",
data_dir, strerror(saved_errno));
wait_for_key(curwin, 7, ATTR_WAITERROR_STR);
deltxwin();
free(buf);
return false;
}
}
}
filename = game_filename(num);
assert(filename != NULL);
file = fopen(filename, "w");
if (file == NULL) {
// File could not be opened for writing
saved_errno = errno;
newtxwin(9, 70, LINE_OFFSET + 9, COL_CENTER(70));
wbkgd(curwin, ATTR_ERROR_WINDOW);
box(curwin, 0, 0);
center(curwin, 1, ATTR_ERROR_TITLE, " Game Not Saved ");
center(curwin, 3, ATTR_ERROR_STR,
"Game %d could not be saved to disk", num);
center(curwin, 5, ATTR_ERROR_WINDOW, "File %s: %s", filename,
strerror(saved_errno));
wait_for_key(curwin, 7, ATTR_WAITERROR_STR);
deltxwin();
free(buf);
free(filename);
return false;
}
// Write out the game file header and encryption key
fprintf(file, "%s\n" "%s\n", GAME_FILE_HEADER, GAME_FILE_API_VERSION);
fprintf(file, "%d\n", crypt_key);
// Write out various game variables
save_game_write_int(MAX_X);
save_game_write_int(MAX_Y);
save_game_write_int(max_turn);
save_game_write_int(turn_number);
save_game_write_int(number_players);
save_game_write_int(current_player);
save_game_write_int(first_player);
save_game_write_int(MAX_COMPANIES);
save_game_write_double(interest_rate);
// Write out player data
for (i = 0; i < number_players; i++) {
save_game_write_string(player[i].name);
save_game_write_double(player[i].cash);
save_game_write_double(player[i].debt);
save_game_write_bool(player[i].in_game);
for (j = 0; j < MAX_COMPANIES; j++) {
save_game_write_long(player[i].stock_owned[j]);
}
}
// Write out company data
for (i = 0; i < MAX_COMPANIES; i++) {
save_game_write_double(company[i].share_price);
save_game_write_double(company[i].share_return);
save_game_write_long(company[i].stock_issued);
save_game_write_long(company[i].max_stock);
save_game_write_bool(company[i].on_map);
}
// Write out galaxy map
for (x = 0; x < MAX_X; x++) {
memset(buf, 0, MAX_Y + 2);
for (p = buf, y = 0; y < MAX_Y; p++, y++) {
*p = (char) galaxy_map[x][y];
}
*p++ = '\n';
*p = '\0';
scramble(crypt_key, buf, BUFSIZE);
fprintf(file, "%s", buf);
}
// Write out a dummy sentinal value
save_game_write_int(GAME_FILE_SENTINEL);
if (fclose(file) == EOF) {
errno_exit("%s", filename);
}
free(buf);
free(filename);
return true;
}
/*-----------------------------------------------------------------------
Function: select_moves - Select NUMBER_MOVES random moves
Arguments: (none)

7
src/game.h
View File

@ -9,8 +9,8 @@
Author: John Zaitseff <J.Zaitseff@zap.org.au>
$Id$
This file, game.h, contains declarations for the main game functions
used in Star Traders.
This file, game.h, contains declarations for the starting and ending
game functions used in Star Traders.
This program is free software: you can redistribute it and/or modify it
@ -42,9 +42,6 @@
extern void init_game (void);
extern void end_game (void);
extern bool load_game (int num);
extern bool save_game (int num);
extern void select_moves (void);
extern void get_move (void);
extern void process_move (void);

1
src/trader.h
View File

@ -50,6 +50,7 @@
#include "globals.h"
#include "game.h"
#include "fileio.h"
#include "help.h"
#include "intf.h"
#include "utils.h"