open-adventure/saveresume.c
Jason S. Ninneman 8bc08773fa Various cleanups.
* Remove disused macro.
* GCC doesn't seem to mind if IGNORE() is left off.
* Enumify phase codes.
* Use EXIT_* macros in all exit() calls.
* How did this even work without extern?
* Give advent.h a much-needed makeover.
* Use the chomp indicator in YAML string blocks to avoid code ugliness.
2017-07-01 03:19:33 +00:00

129 lines
3.3 KiB
C

#include <stdlib.h>
#include <string.h>
#include "advent.h"
#include "dungeon.h"
#include "linenoise/linenoise.h"
/*
* (ESR) This replaces a bunch of particularly nasty FORTRAN-derived code;
* see the history.adoc file in the source distribution for discussion.
*/
#define VRSION 26 /* bump on save format change */
/*
* If you change the first three members, the resume function may not properly
* reject saves from older versions. Yes, this glues us to a hardware-
* dependent length of long. Later members can change, but bump the version
* when you do that.
*/
struct save_t {
long savetime;
long mode; /* not used, must be present for version detection */
long version;
struct game_t game;
};
struct save_t save;
int savefile(FILE *fp, long version)
/* Save game to file. No input or output from user. */
{
long i, k;
datime(&i, &k);
k = i + 650 * k;
save.savetime = k;
save.mode = -1;
save.version = (version == 0) ? VRSION : version;
memcpy(&save.game, &game, sizeof(struct game_t));
fwrite(&save, sizeof(struct save_t), 1, fp);
return (0);
}
/* Suspend and resume */
int suspend(void)
{
/* Suspend. Offer to save things in a file, but charging
* some points (so can't win by using saved games to retry
* battles or to start over after learning zzword).
* If ADVENT_NOSAVE is defined, do nothing instead. */
#ifdef ADVENT_NOSAVE
return GO_UNKNOWN;
#endif
FILE *fp = NULL;
rspeak(SUSPEND_WARNING);
if (!yes(arbitrary_messages[THIS_ACCEPTABLE], arbitrary_messages[OK_MAN], arbitrary_messages[OK_MAN]))
return GO_CLEAROBJ;
game.saved = game.saved + 5;
while (fp == NULL) {
char* name = linenoise("\nFile name: ");
if (name == NULL)
return GO_TOP;
fp = fopen(name, WRITE_MODE);
if (fp == NULL)
printf("Can't open file %s, try again.\n", name);
linenoiseFree(name);
}
savefile(fp, VRSION);
fclose(fp);
rspeak(RESUME_HELP);
exit(EXIT_SUCCESS);
}
int resume(void)
{
/* Resume. Read a suspended game back from a file.
* If ADVENT_NOSAVE is defined, do nothing instead. */
#ifdef ADVENT_NOSAVE
return GO_UNKNOWN;
#endif
FILE *fp = NULL;
if (game.loc != 1 || game.abbrev[1] != 1) {
rspeak(RESUME_ABANDON);
if (!yes(arbitrary_messages[THIS_ACCEPTABLE], arbitrary_messages[OK_MAN], arbitrary_messages[OK_MAN]))
return GO_CLEAROBJ;
}
while (fp == NULL) {
char* name = linenoise("\nFile name: ");
if (name == NULL)
return GO_TOP;
fp = fopen(name, READ_MODE);
if (fp == NULL)
printf("Can't open file %s, try again.\n", name);
linenoiseFree(name);
}
return restore(fp);
}
int restore(FILE* fp)
{
/* Read and restore game state from file, assuming
* sane initial state.
* If ADVENT_NOSAVE is defined, do nothing instead. */
#ifdef ADVENT_NOSAVE
return GO_UNKNOWN;
#endif
fread(&save, sizeof(struct save_t), 1, fp);
fclose(fp);
if (save.version != VRSION) {
rspeak(VERSION_SKEW, save.version / 10, MOD(save.version, 10), VRSION / 10, MOD(VRSION, 10));
} else {
memcpy(&game, &save.game, sizeof(struct game_t));
//game.zzword = rndvoc(3, game.zzword);
make_zzword(game.zzword);
}
return GO_TOP;
}
/* end */