return state = state * 1664525 + 1013904223;
}
+static void checked_seek(FILE *stream, int64_t offset, int whence)
+{
+ offset = fseek(stream, offset, whence);
+ if (offset < 0) {
+ fprintf(stderr, "seek failed\n");
+ exit(1);
+ }
+}
+
int main(int argc, char **argv)
{
FILE *f;
maxburst = atoi(argv[3]);
state = atoi(argv[4]);
- fseek(f, 0, SEEK_END);
+ checked_seek(f, 0, SEEK_END);
length = ftell(f);
- fseek(f, 0, SEEK_SET);
+ checked_seek(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;
- if (fseek(f, pos, SEEK_SET) < 0) {
- fprintf(stderr, "seek failed\n");
- return 1;
- }
+ checked_seek(f, pos, SEEK_SET);
if (maxburst < 0)
burst = -maxburst;