HP 3000 Manuals HP 3000 Manuals
Updating a File SPL uses the MPE V intrinsic FUPDATE to replace the record last accessed in the file by any intrinsic. This is commonly used to update part of a record that has been located by some identifying data in the same record. The records cannot be variable-length. HP C/XL has no direct equivalent of the FUPDATE intrinsic. You will have to emulate it by using the HP C/XL function ftell to give you the record start byte before you read it. Then you can reposition the file with the fseek function and rewrite the record with fputs, fwrite, or write. You can even write records with fprintf and the rest as long as you remember to write a '\n' character, signaling end-of-record to HP C/XL .