Hello you also could use fseek
More info from the documentation
* File position modes for use with fseek().
#define SEEK_SET 0 /* Seek from start */
#define SEEK_CUR 1 /* Seek from current position */
#define SEEK_END 2 /* Seek from end position */
* Sets the file position indicator.
* @param file Handle to the file
* @param position Position relative to what is specified in whence
* @param start SEEK_ constant value of where to see from
* @return 0 on success, a non-zero value otherwise
native fseek(file, position, start);