Help for COMPRS

PURPOSE

   This program creates a compressed output file by compressing
the input file.  The compression type can by specified by specifying
COMPRESS="NONE", COMPRESS="BASIC", or COMPRESS="BASIC2".  By
specifying COMPRESS="NONE", it will create an uncompressed output
file.  Compression type BASIC and BASIC2 are similar in algorithm
and they only differ in the way the compressed indices are placed
inside the compressed file.  NOTE: The user does not have to be
concerned with the input compression type as this will be handled
by the VICAR rtl.

EXECUTION

   The program simply reads a line from the input file and 
writes it out to the output file using the compression type
specified.

EXAMPLES

   comprs inp=x1 out=x2 compress=BASIC

This command will compress x1 using BASIC compression method and
create a compressed file called x2.

   comprs inp=x1 out=x2 compress=NONE

This command will uncompress x1 (it does not matter if x1 is
compressed or not as we are only concerned with the output
file) and create a file x2.

RESTRICTIONS

The size of image cannot be greater than 
18,446,744,073,709,551,616 bytes.  64 bit long integer is
used to keep track of EOL label position.

Original Programmer: P. Kim, 14 May 2008

Revisions:

P. Kim	2009-07-08	Fixed format string size from 5 to 8
rgd	2020-08-29	Added support for multiband images

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