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Ingy döt Net 2013-04-10 23:57:08 -07:00
parent 47bf37c096
commit b83f433714
12433 changed files with 156208 additions and 123 deletions
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15
Task/Run-length-encoding/Forth/run-length-encoding-1.fth Normal file
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@ -0,0 +1,15 @@
variable a
: n>a (.) tuck a @ swap move a +! ;
: >a a @ c! 1 a +! ;
: encode ( c-addr +n a -- a n' )
dup a ! -rot over c@ 1 2swap 1 /string bounds ?do
over i c@ = if 1+
else n>a >a i c@ 1 then
loop n>a >a a @ over - ;
: digit? [char] 0 [ char 9 1+ literal ] within ;
: decode ( c-addr +n a -- a n' )
dup a ! 0 2swap bounds ?do
i c@ digit? if 10 * i c@ [char] 0 - + else
a @ over i c@ fill a +! 0 then
loop drop a @ over - ;

3
Task/Run-length-encoding/Forth/run-length-encoding-2.fth Normal file
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s" WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW"
here 1000 + encode here 2000 + decode cr 3 spaces type
WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWBWWWWWWWWWWWWWW