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UD N - Unsave Document - get key Numbers

(02/13/97)

PURPOSE

To find number of keys and maximum number of columns used in a document file.

SEE ALSO

UD IC [Unsave document - in core]
UD [Unsave document]

USAGE

.OPERATION: UD N,X<N1>,X<N2>

[Where:
X<N1> is register to be filled with maximum key number.
X<N2> is register to be filled with maximum columns in use in the document file.
Example: UD N,X51,X52 ]

.DOCUMENT FILE: DOC555
[Enter the name of an existing document file.]

[In the example let's say the document file has the first 490 keys filled and the maximum number of columns in the document file is 4. The command listed above will set register 51 to 490 and register 52 to 4.

NOTES

  1. This operation can be slow on large doc files.

SUBROUTINES

RDDOCN, OPENDOC, DOCINFO

CALLER

DRIV3

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