>>>>I tried FREAD instead of FGETS and it looks like it works fine, I tried to read 8192 bytes with FREAD then write them with FWRITE without any modifications and I got same file size.
>>>
>>>With FREAD some occurences may be split between two sequential reads in which case they will not be replaced.
>>
>>Not tested, but I wonder if this might be a faster approach?
><snip>
>
>Jim,
>
>The file size is 130MB. :)

Sergey,

OK, I guess I'm a little dense today. How does the file size affect what I suggested?