DBINDEX_BLK
Name
DBINDEX_BLK
Purpose
Subroutine of DBINDEX to create associated variable of correct datatype
Explanation
DBINDEX_BLK will offset into the file by a specified amount in
preparation for writing to the file. V5.2 or later
Calling Sequence
res = dbindex_blk(unit, nb, bsz, ofb, dtype)
Inputs
unit The unit number assigned to the file.
nb The number of blocks to offset into the file.
bsz The size of each block, in bytes, to offset into the file.
ofb The offset into the block, in bytes.
dtype The IDL datatype as defined in the SIZE function
Outputs
res The returned variable. This is an associated variable.
Restrictions
The file must have been previously opened.
Modification History
Written by Michael R. Greason, STX, 14 June 1990.
Converted to IDL V5.0 W. Landsman September 1997
Use 64 bit integer for very large databases W. Landsman February 2001
Added new unsigned & 64bit integer datatypes W. Landsman July 2001