version 1.10, 1999/02/03 00:10:26
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version 1.14, 1999/03/23 20:24:27
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Line 26 hex \ everything now hex!
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Line 26 hex \ everything now hex!
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\ "a true flag ... [is] a single-cell value with all bits set" |
\ "a true flag ... [is] a single-cell value with all bits set" |
\ better definition: 0 0= constant true ( no dependence on 2's compl) |
\ better definition: 0 0= constant true ( no dependence on 2's compl) |
-1 Constant true ( -- f ) \ core-ext |
-1 Constant true ( -- f ) \ core-ext |
\G CONSTANT: f is a cell with all bits set. |
\G CONSTANT: @var{f} is a cell with all bits set. |
\ see starts looking for primitives after this word! |
\ see starts looking for primitives after this word! |
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0 Constant false ( -- f ) \ core-ext |
0 Constant false ( -- f ) \ core-ext |
\G CONSTANT: f is a cell with all bits clear. |
\G CONSTANT: @var{f} is a cell with all bits clear. |
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1 cells Constant cell ( -- u ) \ gforth |
1 cells Constant cell ( -- u ) \ gforth |
1 floats Constant float ( -- u ) \ gforth |
1 floats Constant float ( -- u ) \ gforth |
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20 Constant bl ( -- c-char ) \ core |
20 Constant bl ( -- c-char ) \ core |
\G c-char is the character value for a space. |
\G @var{c-char} is the character value for a space. |
\ used by docon:, must be constant |
\ used by docon:, must be constant |
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FF Constant /line |
FF Constant /line |
Line 46 FF Constant /line
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Line 46 FF Constant /line
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400 Constant chars/block |
400 Constant chars/block |
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$20 8 2* cells + 2 + cell+ constant word-pno-size ( -- u ) |
$20 8 2* cells + 2 + cell+ constant word-pno-size ( -- u ) |
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create holdbuf word-pno-size chars allot |
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holdbuf word-pno-size chars + aconstant holdbuf-end |
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avariable holdptr holdbuf-end holdptr a! |
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avariable holdend holdbuf-end holdend a! |
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84 constant pad-minsize ( -- u ) |
84 constant pad-minsize ( -- u ) |
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\ that's enough so long |
\ that's enough so long |
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\ User variables 13feb93py |
\ User variables 13feb93py |
Line 86 AUser lp0 ( -- a-addr ) \ gforth
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Line 92 AUser lp0 ( -- a-addr ) \ gforth
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\G OBSOLETE alias of @code{lp0} |
\G OBSOLETE alias of @code{lp0} |
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AUser handler \ pointer to last throw frame |
AUser handler \ pointer to last throw frame |
AUser backtrace-empty \ true if the next THROW should store a backtrace |
User backtrace-empty \ true if the next THROW should store a backtrace |
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AUser backtrace-rp0 \ rp at last call of interpret |
\ AUser output |
\ AUser output |
\ AUser input |
\ AUser input |
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Line 98 AUser "error 0 "error !
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Line 105 AUser "error 0 "error !
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User tibstack \ saves >tib in execute |
User tibstack \ saves >tib in execute |
User >tib \ pointer to terminal input buffer |
User >tib \ pointer to terminal input buffer |
User #tib ( -- a-addr ) \ core-ext |
User #tib ( -- a-addr ) \ core-ext |
\G USER VARIABLE: a-addr is the address of a cell containing |
\G USER VARIABLE: @var{a-addr} is the address of a cell containing |
\G the number of characters in the terminal input buffer. |
\G the number of characters in the terminal input buffer. |
\G OBSOLESCENT: @code{source} superceeds the function of this word. |
\G OBSOLESCENT: @code{source} superceeds the function of this word. |
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User >in ( -- a-addr ) \ core |
User >in ( -- a-addr ) \ core |
\G USER VARIABLE: a-addr is the address of a cell containing the |
\G USER VARIABLE: @var{a-addr} is the address of a cell containing the |
\G char offset from the start of the terminal input buffer to the |
\G char offset from the start of the terminal input buffer to the |
\G start of the parse area |
\G start of the parse area |
0 >in ! \ char number currently processed in tib |
0 >in ! \ char number currently processed in tib |
[THEN] |
[THEN] |
has? file [IF] |
has? file [IF] |
User blk ( -- a-addr ) \ block |
User blk ( -- a-addr ) \ block |
\G USER VARIABLE: a-addr is the address of a cell containing zero |
\G USER VARIABLE: @var{a-addr} is the address of a cell containing zero |
\G (in which case the input source is not a block and can be identified |
\G (in which case the input source is not a block and can be identified |
\G by @code{source-id}) or the number of the block currently being |
\G by @code{source-id}) or the number of the block currently being |
\G interpreted. A Standard program should not alter @code{blk} directly. |
\G interpreted. A Standard program should not alter @code{blk} directly. |
Line 130 has? file [IF]
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Line 137 has? file [IF]
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[THEN] |
[THEN] |
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User base ( -- a-addr ) \ core |
User base ( -- a-addr ) \ core |
\G USER VARIABLE: a-addr is the address of a cell that stores the |
\G USER VARIABLE: @var{a-addr} is the address of a cell that stores the |
\G number base used by default for number conversion during input and output. |
\G number base used by default for number conversion during input and output. |
A base ! |
A base ! |
User dpl -1 dpl ! |
User dpl -1 dpl ! |
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User state ( -- a-addr ) \ core,tools-ext |
User state ( -- a-addr ) \ core,tools-ext |
\G USER VARIABLE: a-addr is the address of a cell containing |
\G Recommended reading: @cite{@code{State}-smartness--Why it is evil |
\G the compilation state flag. 0 => interpreting, -1 => compiling. |
\G and how to exorcise it}, |
\G A program shall not directly alter the value of @code{state}. The |
\G @url{http://www.complang.tuwien.ac.at/papers/ertl98.ps.gz}; short |
\G following Standard words alter the value in @code{state}: |
\G version: Don't use @code{state}! @xref{Interpretation and |
\G @code{:} (colon) @code{;} (semicolon) @code{abort} @code{quit} |
\G Compilation Semantics} for an alternative. USER VARIABLE: @var{a-addr} |
\G @code{:noname} @code{[} (left-bracket) @code{]} (right-bracket) |
\G is the address of a cell containing the compilation state flag. 0 |
\G @code{;code} |
\G => interpreting, -1 => compiling. A program shall not directly |
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\G alter the value of @code{state}. The following Standard words |
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\G alter the value in @code{state}: @code{:} (colon) @code{;} |
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\G (semicolon) @code{abort} @code{quit} @code{:noname} @code{[} |
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\G (left-bracket) @code{]} (right-bracket) @code{;code} |
0 state ! |
0 state ! |
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AUser normal-dp \ the usual dictionary pointer |
AUser normal-dp \ the usual dictionary pointer |