collapseos/forth/fmt.fs

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( requires core, parse, cmp )
: _
999 SWAP ( stop indicator )
DUP 0 = IF '0' EXIT THEN ( 0 is a special case )
BEGIN
DUP 0 = IF DROP EXIT THEN
10 /MOD ( r q )
SWAP '0' + SWAP ( d q )
AGAIN
;
: . ( n -- )
( handle negative )
DUP 0< IF '-' EMIT -1 * THEN
_
BEGIN
DUP '9' > IF DROP EXIT THEN ( stop indicator, we're done )
EMIT
AGAIN
;
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: ? @ . ;
: _
DUP 9 > IF 10 - 'a' +
ELSE '0' + THEN
;
( For hex display, there are no negatives )
: .x
256 MOD ( ensure < 0x100 )
16 /MOD ( l h )
_ EMIT ( l )
_ EMIT
;
: .X
256 /MOD ( l h )
.x .x
;
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( a -- a+8 )
: _
DUP ( save for 2nd loop )
':' EMIT DUP .x SPC
4 0 DO
DUP @
256 /MOD SWAP
.x .x
SPC
2+
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LOOP
DROP
8 0 DO
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C@+
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DUP <>{ 0x20 &< 0x7e |> <>}
IF DROP '.' THEN
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EMIT
LOOP
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CRLF
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;
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( n a -- )
: DUMP
LF
BEGIN
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OVER 1 < IF 2DROP EXIT THEN
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_
SWAP 8 - SWAP
AGAIN
;