-
Notifications
You must be signed in to change notification settings - Fork 635
Expand file tree
/
Copy pathrevision.c
More file actions
89 lines (75 loc) · 2.36 KB
/
Copy pathrevision.c
File metadata and controls
89 lines (75 loc) · 2.36 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
/* NetHack 5.0 revision.c $NHDT-Date: 1779927286 2026/05/28 00:14:46 $ $NHDT-Branch: NetHack-5.0 $:$NHDT-Revision: 1.1 $ */
/* Copyright (c) Michael Allison, 2026. */
/* NetHack may be freely redistributed. See license for details. */
#include "hack.h"
boolean revision_increment(
int file_rev_level,
int file_critical_byte_count,
uchar *csc)
{
if (file_rev_level == 0 && SAVEFILE_REVISION_LEVEL == 1) {
/*
* Revision 1
* We set a flag gu.uplift_needed_rev0_to_rev1 for use by restore routines.
*
*/
gu.uplift_needed_rev0_to_rev1 = 1;
if (csc[file_critical_byte_count - 1] == 0)
/* below may not be necessary, or even useful */
csc[file_critical_byte_count - 1] = SAVEFILE_REVISION_LEVEL;
return TRUE;
}
return FALSE;
}
#ifdef DEMO_UPLIFTS
/* original revision 0 is in include/revision.h */
/* revision 1 */
struct mystruct {
int field1;
int field2;
char field3;
long field4;
int newfielda;
int newfieldb;
};
void
uplift_mystruct_rev0_to_mystruct(struct mystruct_rev0 *rev0,
struct mystruct *rev1)
{
rev1->field1 = rev0->field1;
rev1->field2 = rev0->field2;
rev1->field3 = rev0->field3;
rev1->field4 = rev0->field4;
rev1->newfielda = 0; // new field
rev1->newfieldb = 0; // new field
}
void
read_mystruct(struct mystruct *ms)
{
#ifdef SAVEFILE_REVISION_LEVEL
#if (SAVEFILE_REVISION_LEVEL == 0)
Sfi_mystruct(nhfp, ms, "mystruct-example");
#elif (SAVEFILE_REVISION_LEVEL == 1)
#define MYSTRUCT_REV0
#include "revision.h"
#undef MYSTRUCT_REV0
if (!gu.uplift_needed_rev0_to_rev1) {
Sfi_mystruct(nhfp, ms, "mystruct-example");
} else {
struct mystruct_rev0 old_mystruct;
Sfi_mystruct_rev0(nhfp, &old_mystruct, "mystruct-example");
uplift_mystruct_rev0_to_mystruct(&old_mystruct, ms);
}
/* this could be elsewhere in some other sourcefile for example,
* where it is needed */
if (gu.uplift_needed_rev0_to_rev1 == 1) {
/* Provide suitable starting values for fields that were not
* present in the previous revision that was read */
ms->newfielda = 0; // new field in Rev. 1
ms->newfieldb = 42; // new field in Rev. 1
}
#endif
#endif /* SAVEFILE_REVISION_LEVEL */
}
#endif /* DEMO_UPLIFTS */
/*revision.c*/