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
90
91
92
93
94
95
96
97
98
99
100
|
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h> /* exit(), atexit() */
#include "p_checksum.h"
#include "md5.h"
#include "doomstat.h" /* players{,ingame} */
#include "lprintf.h"
/* forward decls */
static void p_checksum_cleanup(void);
void checksum_gamestate(int tic);
/* vars */
static void p_checksum_nop(int tic){} /* do nothing */
void (*P_Checksum)(int) = p_checksum_nop;
/*
* P_RecordChecksum
* sets up the file and function pointers to write out checksum data
*/
static FILE *outfile = NULL;
static struct MD5Context md5global;
void P_RecordChecksum(const char *file) {
size_t fnsize;
fnsize = strlen(file);
/* special case: write to stdout */
if(0 == strncmp("-",file,MIN(1,fnsize)))
outfile = stdout;
else {
outfile = fopen(file,"wb");
if(NULL == outfile) {
I_Error("cannot open %s for writing checksum:\n%s\n",
file, strerror(errno));
}
atexit(p_checksum_cleanup);
}
MD5Init(&md5global);
P_Checksum = checksum_gamestate;
}
void P_ChecksumFinal(void) {
int i;
unsigned char digest[16];
if (!outfile)
return;
MD5Final(digest, &md5global);
fprintf(outfile, "final: ");
for (i=0; i<16; i++)
fprintf(outfile,"%x", digest[i]);
fprintf(outfile, "\n");
MD5Init(&md5global);
}
static void p_checksum_cleanup(void) {
if (outfile && (outfile != stdout))
fclose(outfile);
}
/*
* runs on each tic when recording checksums
*/
void checksum_gamestate(int tic) {
int i;
struct MD5Context md5ctx;
unsigned char digest[16];
char buffer[2048];
fprintf(outfile,"%6d, ", tic);
/* based on "ArchivePlayers" */
MD5Init(&md5ctx);
for (i=0 ; i<MAXPLAYERS ; i++) {
if (!playeringame[i]) continue;
#ifdef HAVE_SNPRINTF
snprintf (buffer, sizeof(buffer), "%d", players[i].health);
#else
sprintf (buffer, "%d", players[i].health);
#endif
buffer[sizeof(buffer)-1] = 0;
MD5Update(&md5ctx, (md5byte const *)&buffer, strlen(buffer));
}
MD5Final(digest, &md5ctx);
for (i=0; i<16; i++) {
MD5Update(&md5global, (md5byte const *)&digest[i], sizeof(digest[i]));
fprintf(outfile,"%x", digest[i]);
}
fprintf(outfile,"\n");
}
|
