mirror of
https://github.com/DrBeef/DVR.git
synced 2024-12-19 00:51:53 +00:00
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <stdlib.h> /* exit(), atexit() */
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#include "p_checksum.h"
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#include "md5.h"
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#include "doomstat.h" /* players{,ingame} */
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#include "lprintf.h"
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/* forward decls */
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static void p_checksum_cleanup(void);
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void checksum_gamestate(int tic);
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/* vars */
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static void p_checksum_nop(int tic){} /* do nothing */
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void (*P_Checksum)(int) = p_checksum_nop;
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/*
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* P_RecordChecksum
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* sets up the file and function pointers to write out checksum data
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*/
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static FILE *outfile = NULL;
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static struct MD5Context md5global;
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void P_RecordChecksum(const char *file) {
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size_t fnsize;
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fnsize = strlen(file);
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/* special case: write to stdout */
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// if(0 == strncmp("-",file,MIN(1,fnsize)))
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// outfile = stdout;
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// else {
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outfile = fopen(file,"wb");
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if(NULL == outfile) {
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I_Error("cannot open %s for writing\n",
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file);
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}
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atexit(p_checksum_cleanup);
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//}
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MD5Init(&md5global);
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P_Checksum = checksum_gamestate;
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}
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void P_ChecksumFinal(void) {
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int i;
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unsigned char digest[16];
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if (!outfile)
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return;
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MD5Final(digest, &md5global);
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fprintf(outfile, "final: ");
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for (i=0; i<16; i++)
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fprintf(outfile,"%x", digest[i]);
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fprintf(outfile, "\n");
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MD5Init(&md5global);
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}
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static void p_checksum_cleanup(void) {
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if (outfile ) // && (outfile != stdout))
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fclose(outfile);
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}
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/*
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* runs on each tic when recording checksums
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*/
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void checksum_gamestate(int tic) {
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int i;
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struct MD5Context md5ctx;
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unsigned char digest[16];
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char buffer[2048];
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fprintf(outfile,"%6d, ", tic);
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/* based on "ArchivePlayers" */
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MD5Init(&md5ctx);
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for (i=0 ; i<MAXPLAYERS ; i++) {
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if (!playeringame[i]) continue;
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#ifdef HAVE_SNPRINTF
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snprintf (buffer, sizeof(buffer), "%d", players[i].health);
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#else
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sprintf (buffer, "%d", players[i].health);
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#endif
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buffer[sizeof(buffer)-1] = 0;
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MD5Update(&md5ctx, (md5byte const *)&buffer, strlen(buffer));
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}
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MD5Final(digest, &md5ctx);
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for (i=0; i<16; i++) {
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MD5Update(&md5global, (md5byte const *)&digest[i], sizeof(digest[i]));
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fprintf(outfile,"%x", digest[i]);
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}
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fprintf(outfile,"\n");
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}
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