[Compression] Refactor the code that computes the number of characters that we fit in a 64bit number.
[Compression] Refactor the code that computes the number of characters that we fit in a 64bit number.

We are going to use this code in one other place.

allevato/swift,ben-ng/swift,kstaring/swift,modocache/swift,tinysun212/swift-windows,xwu/swift,stephentyrone/swift,lorentey/swift,gottesmm/swift,xwu/swift,alblue/swift,benlangmuir/swift,ben-ng/swift,kstaring/swift,SwiftAndroid/swift,atrick/swift,Jnosh/swift,return/swift,frootloops/swift,gottesmm/swift,austinzheng/swift,nathawes/swift,jopamer/swift,tardieu/swift,tkremenek/swift,rudkx/swift,therealbnut/swift,slavapestov/swift,felix91gr/swift,JGiola/swift,hughbe/swift,gottesmm/swift,bitjammer/swift,natecook1000/swift,deyton/swift,shajrawi/swift,manavgabhawala/swift,shahmishal/swift,kperryua/swift,djwbrown/swift,IngmarStein/swift,practicalswift/swift,milseman/swift,danielmartin/swift,gottesmm/swift,harlanhaskins/swift,gregomni/swift,austinzheng/swift,tinysun212/swift-windows,johnno1962d/swift,airspeedswift/swift,lorentey/swift,milseman/swift,tjw/swift,apple/swift,jmgc/swift,return/swift,arvedviehweger/swift,OscarSwanros/swift,jmgc/swift,SwiftAndroid/swift,sschiau/swift,calebd/swift,aschwaighofer/swift,nathawes/swift,OscarSwanros/swift,austinzheng/swift,ken0nek/swift,xedin/swift,JaSpa/swift,devincoughlin/swift,practicalswift/swift,tjw/swift,hughbe/swift,gmilos/swift,brentdax/swift,felix91gr/swift,KrishMunot/swift,airspeedswift/swift,dreamsxin/swift,dreamsxin/swift,jtbandes/swift,gmilos/swift,jckarter/swift,tjw/swift,milseman/swift,stephentyrone/swift,adrfer/swift,jmgc/swift,huonw/swift,amraboelela/swift,glessard/swift,jckarter/swift,zisko/swift,IngmarStein/swift,IngmarStein/swift,codestergit/swift,devincoughlin/swift,felix91gr/swift,apple/swift,karwa/swift,slavapestov/swift,zisko/swift,lorentey/swift,kperryua/swift,gregomni/swift,zisko/swift,therealbnut/swift,arvedviehweger/swift,milseman/swift,gribozavr/swift,codestergit/swift,KrishMunot/swift,gribozavr/swift,roambotics/swift,karwa/swift,ken0nek/swift,jmgc/swift,lorentey/swift,slavapestov/swift,bitjammer/swift,atrick/swift,OscarSwanros/swift,amraboelela/swift,slavapestov/swift,allevato/swift,IngmarStein/swift,kperryua/swift,swiftix/swift,ken0nek/swift,tinysun212/swift-windows,bitjammer/swift,jopamer/swift,glessard/swift,karwa/swift,natecook1000/swift,glessard/swift,ben-ng/swift,danielmartin/swift,johnno1962d/swift,return/swift,dduan/swift,shahmishal/swift,rudkx/swift,sschiau/swift,roambotics/swift,karwa/swift,CodaFi/swift,kstaring/swift,tardieu/swift,deyton/swift,atrick/swift,jopamer/swift,rudkx/swift,uasys/swift,jopamer/swift,dduan/swift,OscarSwanros/swift,uasys/swift,rudkx/swift,tkremenek/swift,shajrawi/swift,djwbrown/swift,ahoppen/swift,benlangmuir/swift,tjw/swift,frootloops/swift,airspeedswift/swift,JGiola/swift,gmilos/swift,nathawes/swift,tjw/swift,calebd/swift,slavapestov/swift,lorentey/swift,ahoppen/swift,deyton/swift,benlangmuir/swift,aschwaighofer/swift,xwu/swift,benlangmuir/swift,natecook1000/swift,kperryua/swift,gribozavr/swift,johnno1962d/swift,shajrawi/swift,xwu/swift,alblue/swift,austinzheng/swift,tinysun212/swift-windows,return/swift,airspeedswift/swift,djwbrown/swift,devincoughlin/swift,aschwaighofer/swift,SwiftAndroid/swift,brentdax/swift,stephentyrone/swift,SwiftAndroid/swift,IngmarStein/swift,ken0nek/swift,lorentey/swift,CodaFi/swift,modocache/swift,Jnosh/swift,apple/swift,sschiau/swift,brentdax/swift,jopamer/swift,uasys/swift,manavgabhawala/swift,milseman/swift,apple/swift,deyton/swift,arvedviehweger/swift,apple/swift,zisko/swift,tjw/swift,tinysun212/swift-windows,deyton/swift,glessard/swift,parkera/swift,devincoughlin/swift,djwbrown/swift,tardieu/swift,shahmishal/swift,russbishop/swift,jckarter/swift,huonw/swift,hooman/swift,sschiau/swift,allevato/swift,codestergit/swift,huonw/swift,xwu/swift,harlanhaskins/swift,hughbe/swift,gribozavr/swift,ben-ng/swift,practicalswift/swift,djwbrown/swift,CodaFi/swift,xedin/swift,KrishMunot/swift,airspeedswift/swift,austinzheng/swift,johnno1962d/swift,aschwaighofer/swift,russbishop/swift,johnno1962d/swift,devincoughlin/swift,kperryua/swift,austinzheng/swift,adrfer/swift,shahmishal/swift,OscarSwanros/swift,danielmartin/swift,jmgc/swift,hooman/swift,hughbe/swift,djwbrown/swift,ahoppen/swift,shahmishal/swift,xedin/swift,atrick/swift,gregomni/swift,modocache/swift,JaSpa/swift,KrishMunot/swift,natecook1000/swift,parkera/swift,harlanhaskins/swift,shajrawi/swift,dduan/swift,deyton/swift,nathawes/swift,harlanhaskins/swift,karwa/swift,swiftix/swift,dduan/swift,dduan/swift,codestergit/swift,calebd/swift,hooman/swift,huonw/swift,bitjammer/swift,karwa/swift,OscarSwanros/swift,manavgabhawala/swift,kstaring/swift,airspeedswift/swift,danielmartin/swift,jtbandes/swift,gmilos/swift,alblue/swift,arvedviehweger/swift,Jnosh/swift,modocache/swift,manavgabhawala/swift,jckarter/swift,lorentey/swift,SwiftAndroid/swift,jtbandes/swift,shajrawi/swift,karwa/swift,frootloops/swift,parkera/swift,brentdax/swift,johnno1962d/swift,adrfer/swift,xedin/swift,devincoughlin/swift,tinysun212/swift-windows,OscarSwanros/swift,sschiau/swift,parkera/swift,JaSpa/swift,jtbandes/swift,natecook1000/swift,therealbnut/swift,deyton/swift,kstaring/swift,Kris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