Add "genre" command line option
[libav.git] / tools / trasher.c
CommitLineData
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1
2#include <stdio.h>
3#include <stdlib.h>
4#include <time.h>
5#include <inttypes.h>
6
7int main(int argc, char** argv)
8{
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9 FILE *f;
10 int count, maxburst, length;
11
12 if (argc < 4){
13 printf("USAGE: trasher <filename> <count> <maxburst>\n");
14 return 1;
15 }
16
17 f= fopen(argv[1], "rb+");
18 if (!f){
19 perror(argv[1]);
20 return 2;
21 }
22 count= atoi(argv[2]);
23 maxburst= atoi(argv[3]);
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24
25 srand (time (0));
26
27 fseek(f, 0, SEEK_END);
28 length= ftell(f);
29 fseek(f, 0, SEEK_SET);
30
31 while(count--){
32 int burst= 1 + random() * (uint64_t) (abs(maxburst)-1) / RAND_MAX;
33 int pos= random() * (uint64_t) length / RAND_MAX;
34 fseek(f, pos, SEEK_SET);
35
36 if(maxburst<0) burst= -maxburst;
37
38 if(pos + burst > length)
39 continue;
40
41 while(burst--){
42 int val= random() * 256ULL / RAND_MAX;
43
44 if(maxburst<0) val=0;
45
46 fwrite(&val, 1, 1, f);
47 }
48 }
49
50 return 0;
51}