X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=tools%2Ftrasher.c;h=61fd395f28c2fcef84178918285e442575231441;hb=6968a7d1938cc009bad7a971f26d85ed271747ef;hp=114eb78a683db1d825d5ebb726ff1b3451328a9f;hpb=dd3ca3ea15392da8636c06764e2da31e6ca700f0;p=ffmpeg diff --git a/tools/trasher.c b/tools/trasher.c index 114eb78a683..61fd395f28c 100644 --- a/tools/trasher.c +++ b/tools/trasher.c @@ -23,47 +23,50 @@ #include static uint32_t state; -static uint32_t ran(void){ - return state= state*1664525+1013904223; +static uint32_t ran(void) +{ + return state = state * 1664525 + 1013904223; } -int main(int argc, char** argv) +int main(int argc, char **argv) { FILE *f; int count, maxburst, length; - if (argc < 5){ + if (argc < 5) { printf("USAGE: trasher \n"); return 1; } - f= fopen(argv[1], "rb+"); - if (!f){ + f = fopen(argv[1], "rb+"); + if (!f) { perror(argv[1]); return 2; } - count= atoi(argv[2]); - maxburst= atoi(argv[3]); - state= atoi(argv[4]); + count = atoi(argv[2]); + maxburst = atoi(argv[3]); + state = atoi(argv[4]); fseek(f, 0, SEEK_END); - length= ftell(f); + length = ftell(f); fseek(f, 0, SEEK_SET); - while(count--){ - int burst= 1 + ran() * (uint64_t) (abs(maxburst)-1) / UINT32_MAX; - int pos= ran() * (uint64_t) length / UINT32_MAX; + while (count--) { + int burst = 1 + ran() * (uint64_t) (abs(maxburst) - 1) / UINT32_MAX; + int pos = ran() * (uint64_t) length / UINT32_MAX; fseek(f, pos, SEEK_SET); - if(maxburst<0) burst= -maxburst; + if (maxburst < 0) + burst = -maxburst; - if(pos + burst > length) + if (pos + burst > length) continue; - while(burst--){ - int val= ran() * 256ULL / UINT32_MAX; + while (burst--) { + int val = ran() * 256ULL / UINT32_MAX; - if(maxburst<0) val=0; + if (maxburst < 0) + val = 0; fwrite(&val, 1, 1, f); }