version 1.19, 1999/11/08 22:01:12
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version 1.24, 2000/09/23 15:47:12
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\ VARS.FS Kernal variables |
\ VARS.FS Kernal variables |
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\ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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\ You should have received a copy of the GNU General Public License |
\ You should have received a copy of the GNU General Public License |
\ along with this program; if not, write to the Free Software |
\ along with this program; if not, write to the Free Software |
\ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
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hex \ everything now hex! 11may93jaw |
hex \ everything now hex! 11may93jaw |
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Line 34 hex \ everything now hex!
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Line 34 hex \ everything now hex!
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[IFUNDEF] cell |
[IFUNDEF] cell |
1 cells Constant cell ( -- u ) \ gforth |
1 cells Constant cell ( -- u ) \ gforth |
\G @code{Constant} -- the number of address units corresponding to 1 cell. |
\G @code{Constant} -- @code{1 cells} |
[THEN] |
[THEN] |
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1 floats Constant float ( -- u ) \ gforth |
1 floats Constant float ( -- u ) \ gforth |
\G @code{Constant} -- the number of address units corresponding to a floating-point number. |
\G @code{Constant} -- the number of address units corresponding to a floating-point number. |
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20 Constant bl ( -- c-char ) \ core |
20 Constant bl ( -- c-char ) \ core b-l |
\G @i{c-char} is the character value for a space. |
\G @i{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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Line 112 AUser "error 0 "error !
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Line 112 AUser "error 0 "error !
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[IFUNDEF] #tib \ in ec-Version we may define this ourself |
[IFUNDEF] #tib \ in ec-Version we may define this ourself |
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 number-t-i-b |
\G @code{User} variable -- @i{a-addr} is the address of a cell containing |
\G @code{User} variable -- @i{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 to-in |
\G @code{User} variable -- @i{a-addr} is the address of a cell containing the |
\G @code{User} variable -- @i{a-addr} is the address of a cell containing the |
\G char offset from the start of the input buffer to the start of the |
\G char offset from the start of the input buffer to the start of the |
\G parse area. |
\G 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 b-l-k |
\G @code{User} variable -- @i{a-addr} is the address of a cell containing zero |
\G @code{User} variable -- @i{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 |
Line 157 has? file [IF]
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Line 157 has? file [IF]
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-1 dpl ! |
-1 dpl ! |
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User state ( -- a-addr ) \ core,tools-ext |
User state ( -- a-addr ) \ core,tools-ext |
\G @code{User} variable -- @i{a-addr} is the address of a cell containing the |
\G @code{User} variable -- @i{a-addr} is the address of a cell |
\G compilation state flag. 0 => interpreting, -1 => compiling. A |
\G containing the compilation state flag. 0 => interpreting, -1 => |
\G program shall not directly alter the value of @code{state}. The |
\G compiling. A program shall not directly alter the value of |
\G following Standard words alter the value in @code{state}: @code{:} |
\G @code{state}. The following Standard words alter the value in |
\G (colon) @code{;} (semicolon) @code{abort} @code{quit} |
\G @code{state}: @code{:} (colon) @code{;} (semicolon) @code{abort} |
\G @code{:noname} @code{[} (left-bracket) @code{]} (right-bracket) |
\G @code{quit} @code{:noname} @code{[} (left-bracket) @code{]} |
\G @code{;code}. Don't use @code{state}! @xref{Interpretation and |
\G (right-bracket) @code{;code}. Don't use @code{state}! For an |
\G Compilation Semantics} for an alternative. |
\G alternative see @ref{Interpretation and Compilation Semantics}. |
\ Recommended reading: @cite{@code{State}-smartness--Why it is evil |
\ Recommended reading: @cite{@code{State}-smartness--Why it is evil |
\ and how to exorcise it}, |
\ and how to exorcise it}, |
\ @url{http://www.complang.tuwien.ac.at/papers/ertl98.ps.gz}; short |
\ @url{http://www.complang.tuwien.ac.at/papers/ertl98.ps.gz}; short |
\ version: Don't use @code{state}! |
\ version: Don't use @code{state}! |
0 state ! |
0 state ! |
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AUser normal-dp \ the usual dictionary pointer |
AUser normal-dp \ the usual dictionary pointer |