: cell+  8 + ;
: syswrite ( u c-addr fd -- n )  1 syscall3 ;
: say ( c-addr u -- )  swap 2 syswrite drop ;
: emit ( chr -- )  sp cell+ 1 swap 1 syswrite 2drop ;
: cr  10 emit ;

: decimal  10 base ! ;
: hex  16 base ! ;

: nip  swap drop ;
: tuck  swap over ;

hex
: ret,  c3 c, ;
decimal

: cells  8 * ;
: allot  here @ swap here +! ;

: [compile]  parse find drop >cfa compile, ; immediate
: '  parse find drop >cfa [compile] lit ; immediate \ note: no error handling (yet)
: recurse  latest @ >cfa compile, ; immediate
: literal  [compile] lit ; immediate
: constant  create [compile] lit ret, ;
: variable  1 cells allot create [compile] lit ret, ;

\ TODO interpret mode strings?
: s"  [ char " ] literal 1 >in +! ( skip spc ) [compile] litstring ; immediate
: ."  [compile] s" ' say compile, ; immediate \ lol this word breaks the highlighting, here have another "

\ forth83 (got them from pforth tho ehehe)
\ < backward jump  > forward jump
\ adding/subtracting 4 gets to the next instruction.
: <mark  here @ ;
: <resolve  here @ 4 + - d, ;
: >mark  here @ 0 d, ;
: >resolve  dup here @ swap - 4 - swap d! ;

: begin  <mark ; immediate
: again  branch <resolve ; immediate \ add 4 to get to beginning of the next instruction
: until  0branch <resolve ; immediate
: if  0branch >mark ; immediate ( I: -- a )
: else  branch >mark swap >resolve ; immediate
: then  >resolve ; immediate
: while  0branch >mark ; immediate
: repeat  branch swap <resolve >resolve ; immediate

: /  /mod swap drop ;
: mod  /mod drop ;
: negate  0 swap - ;
: abs  dup 0< if negate then ;

32 constant bl
: space  bl emit ;
: spaces  begin dup 0> while space 1- repeat drop ;

\ PNO
\ mostly from pforth
255 allot variable pad
variable hld
: <#  pad hld ! ;
: hold  1 hld -! ( chr ) hld @ c! ;
: sign  0< if [ char - ] literal hold then ;
: #  base @ /mod swap 9 over > if 7 + then [ char 0 ] literal + hold ;
: #s  begin # dup 0= until ;
: #>  drop hld @ pad over - ;

: (u.)  <# #s #> ;
: u.  (u.) say space ;
: u.r  >r (u.) r> over - spaces say ;
: (.)  dup abs <# #s swap sign #> ;
: . (.)  say space ;

\ TODO something is leaking its stack (a word address i think)
15 10 u.r
t
bye