Imagine I am writing to a file directly to the position 1025 bytes, leaving the first 1024 bytes in null.
I want to open the file again, and searching from the first byte position, check if the first byte is null (hasn’t real data)?
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Imagine I am writing to a file directly to the position 1025 bytes, leaving the first 1024 bytes in null.
I want to open the file again, and searching from the first byte position, check if the first byte is null (hasn’t real data)?
How would you expect to tell the difference between a file which had 1024 bytes all written out as zero, and a file which “hasn’t real data”?
If all you want to do is check for the first 1024 bytes being zero, just read the data and compare it in the normal way.