X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=saveresume.c;h=0b71319c0dc835368eb95f0df39d1dc6e8f5d292;hb=4b08b726f9735b5a6a17e588753a496700ff25f7;hp=db1153b3c793bef7bb8bddc35ba55c236c98c5bb;hpb=25230068fe3afb9d1faa9c606413784294700cef;p=open-adventure.git

diff --git a/saveresume.c b/saveresume.c
index db1153b..0b71319 100644
--- a/saveresume.c
+++ b/saveresume.c
@@ -18,37 +18,16 @@
 #include "advent.h"
 #include "dungeon.h"
 
-/*
- * Bump on save format change.
- *
- * Note: Verify that the tests run clean before bumping this, then rebuild the check
- * files afterwards.  Otherwise you will get a spurious failure due to the old version
- * having been generated into a check file.
- */
-#define VRSION	29
-
-/*
- * 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 int.  Later members can change, but bump the version
- * when you do that.
- */
-struct save_t {
-    int64_t savetime;
-    int32_t mode;		/* not used, must be present for version detection */
-    int32_t version;
-    struct game_t game;
-};
 struct save_t save;
 
 #define IGNORE(r) do{if (r){}}while(0)
 
-int savefile(FILE *fp, int32_t version)
+int savefile(FILE *fp)
 /* Save game to file. No input or output from user. */
 {
-    save.savetime = time(NULL);
-    save.mode = -1;
-    save.version = (version == 0) ? VRSION : version;
+    memcpy(&save.magic, ADVENT_MAGIC, sizeof(ADVENT_MAGIC));
+    if (save.version == 0)
+	save.version = SAVE_VERSION;
 
     save.game = game;
     IGNORE(fwrite(&save, sizeof(struct save_t), 1, fp));
@@ -106,7 +85,7 @@ int suspend(void)
         free(name);
     }
 
-    savefile(fp, VRSION);
+    savefile(fp);
     fclose(fp);
     rspeak(RESUME_HELP);
     exit(EXIT_SUCCESS);
@@ -123,8 +102,7 @@ int resume(void)
 #endif
     FILE *fp = NULL;
 
-    if (game.loc != 1 ||
-        game.abbrev[1] != 1) {
+    if (game.loc != LOC_START || game.abbrev[LOC_START] != 1) {
         rspeak(RESUME_ABANDON);
         if (!yes_or_no(arbitrary_messages[THIS_ACCEPTABLE], arbitrary_messages[OK_MAN], arbitrary_messages[OK_MAN]))
             return GO_CLEAROBJ;
@@ -158,8 +136,10 @@ int restore(FILE* fp)
 
     IGNORE(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));
+    if (memcmp(save.magic, ADVENT_MAGIC, sizeof(ADVENT_MAGIC)) != 0)
+	rspeak(BAD_SAVE);
+    else if (save.version != SAVE_VERSION) {
+        rspeak(VERSION_SKEW, save.version / 10, MOD(save.version, 10), SAVE_VERSION / 10, MOD(SAVE_VERSION, 10));
     } else if (!is_valid(save.game)) {
 	rspeak(SAVE_TAMPERING);
 	exit(EXIT_SUCCESS);