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DSC Tech Library



Function fpkey_get retreives/locks a record in index order by the value specified.

The syntax for fpkey_get is as follows:

fpkey_get(int file_id, int flags, int index, char *keyval, int key_len, char *keyval_found, char *record, int record_len, int *recno, int *keyloc)

   int file_id          - File unit of open file from previous 
                          fpfile_open function.

   int flags            - Bitmapped flag indicating type of get to perform.
                           0   (FSNFST)   - find first entry
                           1   (FSNEQL)   - find entry equal to
                           2   (FSNPAR)   - find partial
                           3   (FSNGTR)   - find greater than
                           4   (FSNGEQ)   - find greater than or equal to
                           5   (FSNLSS)   - find less than
                           6   (FSNLEQ)   - find less than or equal to
                           7   (FSNLST)   - find last entry
                           8   (FSNCUR)   - return current entry - overides 
                                            other search flags
                        - These flags are added to the flags ubove.
                          16   (FSNPRV)   - find previous entry
                          32   (FSNNXT)   - find next entry
                          64   (FSNLCK)   - lock record
                         128   (FSNULK)   - unlock record - overides other
                                            search flags

   int index            - Index number to search on.

   char *keyval         - Value of key to find.

   int key_len          - Length of key to be searched.
   char *keyvalue_found - Value of key found.

   char *record         - Record buffer with key values.

   int record_len       - Length of record to be returned, 0 = entire record.

   int *recno           - Record address of record returned by the get.

   int *keyloc          - Address of the key returned by the get.

The possible values for fperrno and an explanation of each value follow.

     Value            Explanation
     FEROK  - Code  0: Successful FASTPLUS Operation 
     FERACC - Code  2: Illegal access rights
     FEROPN - Code  5: FAST file does not exist
     FERUNT - Code  6: Illegal FAST file id
     FERLEN - Code  7: Illegal record length
     FERFHE - Code  9: System file error
     FERIND - Code 10: Illegal index number
     FERDUP - Code 11: Duplicate key value
     FEREXT - Code 12: Record not found
     FERVLN - Code 17: Illegal key length