--- gforth/kernel/vars.fs 2000/10/29 20:27:03 1.25 +++ gforth/kernel/vars.fs 2006/02/18 13:12:52 1.39 @@ -1,6 +1,6 @@ \ VARS.FS Kernal variables -\ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc. +\ Copyright (C) 1995,1996,1997,1998,2000,2003 Free Software Foundation, Inc. \ This file is part of Gforth. @@ -48,9 +48,11 @@ has? floating [IF] FF Constant /line +has? file [IF] 40 Constant c/l 10 Constant l/s 400 Constant chars/block +[THEN] 20 8 2* cells + 2 + cell+ constant word-pno-size ( -- u ) create holdbuf word-pno-size chars allot @@ -69,27 +71,29 @@ $400 Value def#tib \ initialized by COLD -Create main-task has? OS [IF] 100 [ELSE] 40 [THEN] cells allot +has? no-userspace 0= [IF] +Create main-task has? OS [IF] 100 [ELSE] 40 [THEN] cells dup allot \ set user-pointer from cross-compiler right main-task -UNLOCK tup ! LOCK +UNLOCK swap region user-region user-region setup-region LOCK Variable udp ( -- a-addr ) \ gforth -\ user area size? -anton +\G user area size AUser next-task main-task next-task ! AUser prev-task main-task prev-task ! AUser save-task 0 save-task ! +[THEN] AUser sp0 ( -- a-addr ) \ gforth \G @code{User} variable -- initial value of the data stack pointer. \ sp0 is used by douser:, must be user - ' sp0 Alias s0 ( -- a-addr ) \ gforth +\ ' sp0 Alias s0 ( -- a-addr ) \ gforth \G OBSOLETE alias of @code{sp0} AUser rp0 ( -- a-addr ) \ gforth \G @code{User} variable -- initial value of the return stack pointer. - ' rp0 Alias r0 ( -- a-addr ) \ gforth +\ ' rp0 Alias r0 ( -- a-addr ) \ gforth \G OBSOLETE alias of @code{rp0} has? floating [IF] @@ -101,7 +105,7 @@ AUser fp0 ( -- a-addr ) \ gforth has? glocals [IF] AUser lp0 ( -- a-addr ) \ gforth \G @code{User} variable -- initial value of the locals stack pointer. - ' lp0 Alias l0 ( -- a-addr ) \ gforth +\ ' lp0 Alias l0 ( -- a-addr ) \ gforth \G OBSOLETE alias of @code{lp0} [THEN] @@ -145,8 +149,8 @@ has? file [IF] User loadfile 0 loadfile ! - User loadfilename# 0 loadfilename# ! - + 2user loadfilename 0 0 loadfilename 2! \ addr u for sourcefilename + User loadline \ number of the currently interpreted \ (in TIB) line if the interpretation \ is in a textfile @@ -157,32 +161,35 @@ has? file [IF] [THEN] [THEN] - User base ( -- a-addr ) \ core - \G @code{User} variable -- @i{a-addr} is the address of a cell that stores the - \G number base used by default for number conversion during input and output. - A base ! - User dpl ( -- a-addr ) \ gforth - \G @code{User} variable -- @i{a-addr} is the address of a cell that stores the - \G position of the decimal point in the most recent numeric conversion. - \G Initialised to -1. After the conversion of a number containing no - \G decimal point, @code{@ dpl} is -1. After the conversion of @code{2.} it holds - \G 0. After the conversion of 234123.9 it contains 1, and so forth. - -1 dpl ! - - User state ( -- a-addr ) \ core,tools-ext - \G @code{User} variable -- @i{a-addr} is the address of a cell - \G containing the compilation state flag. 0 => interpreting, -1 => - \G compiling. A program shall not directly alter the value of - \G @code{state}. The following Standard words alter the value in - \G @code{state}: @code{:} (colon) @code{;} (semicolon) @code{abort} - \G @code{quit} @code{:noname} @code{[} (left-bracket) @code{]} - \G (right-bracket) @code{;code}. Don't use @code{state}! For an - \G alternative see @ref{Interpretation and Compilation Semantics}. - \ Recommended reading: @cite{@code{State}-smartness--Why it is evil - \ and how to exorcise it}, - \ @url{http://www.complang.tuwien.ac.at/papers/ertl98.ps.gz}; short - \ version: Don't use @code{state}! - 0 state ! + 2user includefilename 0 0 includefilename 2! \ innermost included file + + +User base ( -- a-addr ) \ core +\G @code{User} variable -- @i{a-addr} is the address of a cell that stores the +\G number base used by default for number conversion during input and output. + A base ! +User dpl ( -- a-addr ) \ gforth +\G @code{User} variable -- @i{a-addr} is the address of a cell that stores the +\G position of the decimal point in the most recent numeric conversion. +\G Initialised to -1. After the conversion of a number containing no +\G decimal point, @code{dpl} is -1. After the conversion of @code{2.} it holds +\G 0. After the conversion of 234123.9 it contains 1, and so forth. +-1 dpl ! + +User state ( -- a-addr ) \ core,tools-ext +\G @code{User} variable -- @i{a-addr} is the address of a cell +\G containing the compilation state flag. 0 => interpreting, -1 => +\G compiling. A program shall not directly alter the value of +\G @code{state}. The following Standard words alter the value in +\G @code{state}: @code{:} (colon) @code{;} (semicolon) @code{abort} +\G @code{quit} @code{:noname} @code{[} (left-bracket) @code{]} +\G (right-bracket) @code{;code}. Don't use @code{state}! For an +\G alternative see @ref{Interpretation and Compilation Semantics}. +\ Recommended reading: @cite{@code{State}-smartness--Why it is evil +\ and how to exorcise it}, +\ @url{http://www.complang.tuwien.ac.at/papers/ertl98.ps.gz}; short +\ version: Don't use @code{state}! +0 state ! AUser normal-dp \ the usual dictionary pointer AUser dpp normal-dp dpp ! @@ -192,6 +199,13 @@ AUser dpp normal-dp dpp ! AUser LastCFA AUser Last +User max-name-length \ maximum length of all names defined yet +32 max-name-length ! + +\ has? peephole [IF] +\ 0 value peeptable \ initialized in boot +\ [THEN] + has? glocals [IF] User locals-size \ this is the current size of the locals stack \ frame of the current word