| /* |
| * Copyright (c) 2007 Michael Niedermayer |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <time.h> |
| #include <inttypes.h> |
| |
| int main(int argc, char** argv) |
| { |
| FILE *f; |
| int count, maxburst, length; |
| |
| if (argc < 4){ |
| printf("USAGE: trasher <filename> <count> <maxburst>\n"); |
| return 1; |
| } |
| |
| f= fopen(argv[1], "rb+"); |
| if (!f){ |
| perror(argv[1]); |
| return 2; |
| } |
| count= atoi(argv[2]); |
| maxburst= atoi(argv[3]); |
| |
| srandom (time (0)); |
| |
| fseek(f, 0, SEEK_END); |
| length= ftell(f); |
| fseek(f, 0, SEEK_SET); |
| |
| while(count--){ |
| int burst= 1 + random() * (uint64_t) (abs(maxburst)-1) / RAND_MAX; |
| int pos= random() * (uint64_t) length / RAND_MAX; |
| fseek(f, pos, SEEK_SET); |
| |
| if(maxburst<0) burst= -maxburst; |
| |
| if(pos + burst > length) |
| continue; |
| |
| while(burst--){ |
| int val= random() * 256ULL / RAND_MAX; |
| |
| if(maxburst<0) val=0; |
| |
| fwrite(&val, 1, 1, f); |
| } |
| } |
| |
| return 0; |
| } |