Remove apparently unneeded define and includes.
[libav.git] / tools / trasher.c
1 /*
2 * Copyright (c) 2007 Michael Niedermayer
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <stdio.h>
22 #include <inttypes.h>
23
24 static uint32_t state;
25 static uint32_t ran(void){
26 return state= state*1664525+1013904223;
27 }
28
29 int main(int argc, char** argv)
30 {
31 FILE *f;
32 int count, maxburst, length;
33
34 if (argc < 5){
35 printf("USAGE: trasher <filename> <count> <maxburst> <seed>\n");
36 return 1;
37 }
38
39 f= fopen(argv[1], "rb+");
40 if (!f){
41 perror(argv[1]);
42 return 2;
43 }
44 count= atoi(argv[2]);
45 maxburst= atoi(argv[3]);
46 state= atoi(argv[4]);
47
48 fseek(f, 0, SEEK_END);
49 length= ftell(f);
50 fseek(f, 0, SEEK_SET);
51
52 while(count--){
53 int burst= 1 + ran() * (uint64_t) (abs(maxburst)-1) / UINT32_MAX;
54 int pos= ran() * (uint64_t) length / UINT32_MAX;
55 fseek(f, pos, SEEK_SET);
56
57 if(maxburst<0) burst= -maxburst;
58
59 if(pos + burst > length)
60 continue;
61
62 while(burst--){
63 int val= ran() * 256ULL / UINT32_MAX;
64
65 if(maxburst<0) val=0;
66
67 fwrite(&val, 1, 1, f);
68 }
69 }
70
71 return 0;
72 }