Converting a string to a number in RPG

[James Lampert <jamesl@xxxxxxxxxxxxxxxxx>]

Given a string representation of a number, zero-blanked (and possibly, 
but not necessarily, even starting in the leftmost position) and with an 
explicit decimal point (that may or may not be present), and a V5R3 
target box,

e.g,  "123.45" or "  1.23" or "1.23" or "1.2" or "123"

Is there some *easy* way my addled brain is overlooking, to parse that 
into a fixed-decimal numeric field (zoned or packed)? Beyond just 
looping through the character positions and building up the number, 
digit by digit?