127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include <editline/readline.h>
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#include <time.h>
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#include "advent.h"
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#include "dungeon.h"
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/*
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* (ESR) This replaces a bunch of particularly nasty FORTRAN-derived code;
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* see the history.adoc file in the source distribution for discussion.
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*/
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#define VRSION 27 /* bump on save format change */
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/*
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* If you change the first three members, the resume function may not properly
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* reject saves from older versions. Yes, this glues us to a hardware-
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* dependent length of long. Later members can change, but bump the version
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* when you do that.
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*/
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struct save_t {
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long savetime;
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long mode; /* not used, must be present for version detection */
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long version;
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struct game_t game;
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};
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struct save_t save;
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#define IGNORE(r) do{if (r){}}while(0)
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int savefile(FILE *fp, long version)
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/* Save game to file. No input or output from user. */
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{
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save.savetime = time(NULL);
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save.mode = -1;
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save.version = (version == 0) ? VRSION : version;
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save.game = game;
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IGNORE(fwrite(&save, sizeof(struct save_t), 1, fp));
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return (0);
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}
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/* Suspend and resume */
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int suspend(void)
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{
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/* Suspend. Offer to save things in a file, but charging
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* some points (so can't win by using saved games to retry
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* battles or to start over after learning zzword).
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* If ADVENT_NOSAVE is defined, do nothing instead. */
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#ifdef ADVENT_NOSAVE
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return GO_UNKNOWN;
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#endif
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FILE *fp = NULL;
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rspeak(SUSPEND_WARNING);
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if (!yes(arbitrary_messages[THIS_ACCEPTABLE], arbitrary_messages[OK_MAN], arbitrary_messages[OK_MAN]))
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return GO_CLEAROBJ;
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game.saved = game.saved + 5;
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while (fp == NULL) {
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char* name = readline("\nFile name: ");
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if (name == NULL)
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return GO_TOP;
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fp = fopen(name, WRITE_MODE);
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if (fp == NULL)
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printf("Can't open file %s, try again.\n", name);
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free(name);
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}
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savefile(fp, VRSION);
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fclose(fp);
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rspeak(RESUME_HELP);
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exit(EXIT_SUCCESS);
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}
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int resume(void)
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{
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/* Resume. Read a suspended game back from a file.
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* If ADVENT_NOSAVE is defined, do nothing instead. */
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#ifdef ADVENT_NOSAVE
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return GO_UNKNOWN;
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#endif
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FILE *fp = NULL;
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if (game.loc != 1 ||
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game.abbrev[1] != 1) {
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rspeak(RESUME_ABANDON);
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if (!yes(arbitrary_messages[THIS_ACCEPTABLE], arbitrary_messages[OK_MAN], arbitrary_messages[OK_MAN]))
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return GO_CLEAROBJ;
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}
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while (fp == NULL) {
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char* name = readline("\nFile name: ");
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if (name == NULL)
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return GO_TOP;
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fp = fopen(name, READ_MODE);
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if (fp == NULL)
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printf("Can't open file %s, try again.\n", name);
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free(name);
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}
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return restore(fp);
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}
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int restore(FILE* fp)
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{
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/* Read and restore game state from file, assuming
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* sane initial state.
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* If ADVENT_NOSAVE is defined, do nothing instead. */
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#ifdef ADVENT_NOSAVE
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return GO_UNKNOWN;
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#endif
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IGNORE(fread(&save, sizeof(struct save_t), 1, fp));
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fclose(fp);
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if (save.version != VRSION) {
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rspeak(VERSION_SKEW, save.version / 10, MOD(save.version, 10), VRSION / 10, MOD(VRSION, 10));
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} else {
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game = save.game;
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}
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return GO_TOP;
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}
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/* end */
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