rajamesandClaude Opus 5.5
dc7e37ba5c
Ruled 2026-10-04: guard all errors. The errors that set NODE-ERROR and let the line run on now stop it at once, with a message. - A store of a non-zero code to NODE-ERROR is a trap, a sixth kind of fault: nothing after it executes, the return stack is emptied, and the data stack is left as the word left it. Not attached, NODE-ERROR is plain memory, as the tests below the prompt use it. - The capsule's words store a code where they stored -1, and the prompt's (RAISED) prints its message: Negative count, Not a number, Number too long, Not a character, Dictionary full, Name missing, Control structure mismatch, Control structures too deep. - ' and COMPILE and [COMPILE] of a word that is not there say UNKNOWN WORD: 'xxx', as the interpreter does. - tests: the trap in test_exec.c; every message from the prompt, with the rest of the line not run and the stack kept, in test_host_quit.c. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
119 lines
4.1 KiB
Plaintext
119 lines
4.1 KiB
Plaintext
\ numout.v4 -- printing numbers: pictured output, the . words, and .S
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\
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\ DECOMPOSITION.md 5.8: <# # #S HOLD SIGN #> . .R U. U.R D. D.R ? SPACES
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\ DECIMAL HEX OCTAL, each the definition given there and executed on the mesh
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\ node by test_pictured.c, test_numout.c and test_printing.c; and .S, which
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\ D-16 makes possible again. Part of the compiler capsule. Rests on core.v4
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\ and forth.v4.
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\
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\ Constants the loader supplies:
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\ HEND byte address just past the hold buffer, which is 64 bytes
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\ -HFLOOR minus the lowest address HOLD may store at: -(HEND - 62)
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\ HLD word address of the variable: where the picture has got to
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\ (W) word address of three cells of scratch for this file:
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\ (W)+0 the width a number is to be printed in
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\ (W)+1 whether a blank follows it (W)+2 .S's count
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macro (-ROT) SWAP push SWAP pop endmacro
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\ ---- unsigned division (section 4) ----
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\ One step a bit, the divisor in A. Exact for uhi < ud.
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: UM/MOD ( ulo uhi ud -- urem uquot )
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a! N-1 FOR
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-if L0
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2* over -if L1 drop 1 + jump L2
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L1: drop L2: push 2* pop
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jump SUB
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L0:
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2* over -if L3 drop 1 + jump L4
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L3: drop L4: push 2* pop
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dup a xor -if L5
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drop -if NOSUB jump SUB
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L5: drop dup inv a + inv -if L6
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drop jump NOSUB
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L6: push drop pop jump SETBIT
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SUB: inv a + inv
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SETBIT: push 1 + pop
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NOSUB:
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NEXT
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over push push drop pop pop ;
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\ ---- pictured output ----
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header <#
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: <# ( -- ) HEND HLD b! !b ;
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header HOLD
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: HOLD ( c -- )
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dup -256 and if OKC drop drop NODE-ERROR b! 4 !b ; \ not a character
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OKC: drop HLD b! @b -HFLOOR + -if ROOM
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drop drop NODE-ERROR b! 3 !b ; \ the buffer is full
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ROOM: drop HLD b! @b -1 + dup !b jump C!
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header SIGN
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: SIGN ( n -- ) -if L1 drop 45 jump HOLD L1: drop ;
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header #
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: # ( ud1 -- ud2 )
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0 (BASE) UM/MOD (-ROT) \ qhi lo rem1
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(BASE) UM/MOD (-ROT) \ qlo qhi rem
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dup -10 + -if L1 drop 48 + jump L2 L1: drop 55 + L2: jump HOLD
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header #S
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: #S ( ud -- 0 0 ) L: # over over OR if L1 drop jump L L1: drop ;
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header #>
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: #> ( ud -- baddr u ) drop drop HLD b! @b HEND over push inv pop + inv ;
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\ ---- spaces and the number base ----
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header SPACES
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: SPACES ( n -- ) -if L drop ; L: if DONE SPACE -1 + jump L DONE: drop ;
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header DECIMAL
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: DECIMAL 10 BASE a! ! ;
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header HEX
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: HEX 16 BASE a! ! ;
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header OCTAL
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: OCTAL 8 BASE a! ! ;
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\ ---- numbers ----
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\ One picture for signed singles, one for unsigned, one for doubles. Each
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\ plain word is its .R word with a width of 0 and the blank flag set, and all
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\ six share one tail, which prints the blank only when the flag is set.
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\ ( baddr u -- ) right-justified in the width, then the blank if wanted
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: (.TAIL)
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(W) b! @b -if POS drop jump OUT \ width < 0
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POS: over - SPACES \ width - u spaces
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OUT: TYPE (W)+1 b! @b if DONE drop jump SPACE
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DONE: drop ;
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: (.BODY) ( n width -- )
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(W) b! !b dup push -if A inv 1 + A: 0 <# #S pop SIGN #> jump (.TAIL)
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: (U.BODY) ( u width -- )
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(W) b! !b 0 <# #S #> jump (.TAIL)
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: (D.BODY) ( d width -- )
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(W) b! !b dup push -if A DNEGATE A: <# #S pop SIGN #> jump (.TAIL)
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header .R
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: DOT-R ( n width -- ) 0 (W)+1 b! !b jump (.BODY)
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header .
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: DOT ( n -- ) -1 (W)+1 b! !b 0 jump (.BODY)
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header U.R
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: U-DOT-R ( u width -- ) 0 (W)+1 b! !b jump (U.BODY)
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header U.
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: U-DOT ( u -- ) -1 (W)+1 b! !b 0 jump (U.BODY)
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header D.R
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: D-DOT-R ( d width -- ) 0 (W)+1 b! !b jump (D.BODY)
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header D.
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: D-DOT ( d -- ) -1 (W)+1 b! !b 0 jump (D.BODY)
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\ ( addr -- ) print what the cell holds
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header ?
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: QUESTION a! @ jump DOT
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\ ( -- ) as v3: the depth between < and >, then every value on the stack,
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\ the deepest first, each followed by a blank; then a new line. The stack is
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\ left as it was. It reads each value with PICK, so it needs a few cells of
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\ the stack free to work in.
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header .S
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: DOT-S
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60 EMIT DEPTH 0 U-DOT-R 62 EMIT SPACE
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DEPTH (W)+2 b! !b
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L: (W)+2 b! @b if DONE
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PICK DOT
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(W)+2 b! @b -1 + !b jump L
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DONE: drop jump CR
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