Name

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    SHRINKINTTYPE

Purpose

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    Reduces the memory occupied by an integer-type array if possible by
    shrinking it into a byte or unsigned short int.

Category

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    Misc

Calling Sequence

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    SHRINKINTTYPE, Array

Inputs

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    Array: Array to be shrunk. Usually of type long. Must not be negative.

Example

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    IDL> q = lindgen(300)
    IDL> help, q
    Q LONG = Array[300]
    IDL> shrinkinttype, q
    IDL> help, q
    Q UINT = Array[300]

Modification History

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    Written by: Jeremy Bailin
    6 Dec 2012 First release
ro shrinkinttype, array
axsizes = [255,65535,4294967296]
axarray = max(array)
rrayshrinktype = value_locate(maxsizes, maxarray)
ase arrayshrinktype of
  -1: array = byte(temporary(array))
  0: array = uint(temporary(array))
  1: array = ulong(temporary(array))
  ; otherwise it must already be in a lon64, and can't be shrunk
ndcase
nd