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DSC Tech Library



Function fpinfo_create returns the file template information for an open fastplus file.

The syntax for fpinfo_create is as follows:

fpinfo_create(int file_id, struct fpc_file *file_desc, struct fpc_index index_desc, struct fpc_data *data_desc, struct fpc_journ *journ_desc)

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

   struct fpc_file{     - Structure to describe base file info.
      int record_len;      - record length in bytes - 0 for variable length records
      int recover;         - set to true for recovery of deleted data record space
      int compress;        - set to true for compression of data records
      int update_mod;      - update modulus for count caching
      int num_data;        - number of split data partitions - up to 8
      int num_index;       - highst index number defined
      int version;         - not used by fpfile_create
      char date[6];        - not used by fpfile_create

   struct fpc_index{    - Structured array to describe indexes /*
      char *pathname;      - pointer to pathname if split, NULL pointer or pointer to null string if not split
      int no_dupes;        - set to true if dupes not allowed
      int sparse_key;      - set to true to not add blank and/or null keys
      int num_parts;       - number of parts of data record in this key (0 if not in data)
      struct fpc_part{     - Describe key in data record.
        int pos;             - zero based part offset in data record -1 for key not in data
        int len;             - size of part in bytes - returned by fpinfo_create()
        int type;            - Type of key part.
                               -  0, FPC_KEY_NONE - don't create this index
                               -  1, FPC_KEY_CHAR - character key - size = bytes
                               -  2, FPC_KEY_SHORT -  2-byte integer key - size = ignored
                               -  3, FPC_KEY_INT - 4-byte integer key - size = ignored
                                     FPC_KEY_LONG - 4-byte integer key - size = ignored
                               -  4, FPC_KEY_LONG - 4-byte floating point key - size = ignored
                               -  5, FPC_KEY_DBLE - 8-byte floating point key - size = ignored
                               -  6, FPC_KEY_BIT - bit field key - size = number of bits
                               -  7, FPC_KEY_DECLS - decimal leading separate field key - size = digits - not including sign
                               -  8, FPC_KEY_DECTS - decimal trailing separate field key - size = digits - not including sign
                               -  9, FPC_KEY_PACK - packed decimal field key - size = digits (must be odd number)
                               - 10, FPC_KEY_DECLE - decimal leading embeded field key - size = digits
                               - 11, FPC_KEY_DECTE - decimal trailing embeded field key - size = digits
                                     FPC_KEY_DEC - decimal trailing embeded field key - size = digits
                               - 12, FPC_KEY_DATE - 3 2-bytes integers (year, month, day) key - size = ignored
        int size;            - Size of part in units (chars, bits, or digits).

    struct fpc_data{        - Structured array to describe data nodes.
      int size;                - size in bytes of this partition
      char *pathname;          - filename of partition
    struct fpc_journ{       - Structure to describe journal file.
      int size;               - maximum size of journal file
      char *pathname;         - filename of journal file

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

      Value             Explanation
     FEROK  - Code  0: Successful FASTPLUS Operation
     FEROPN - Code  5: FAST file does not exist
     FERUNT - Code  6: Illegal FAST file id
     FERFHE - Code  9: System file error