--- gforth/stuff.fs 2003/01/25 20:11:30 1.28 +++ gforth/stuff.fs 2006/01/28 18:57:20 1.50 @@ -1,6 +1,6 @@ \ miscelleneous words -\ Copyright (C) 1996,1997,1998,2000 Free Software Foundation, Inc. +\ Copyright (C) 1996,1997,1998,2000,2003,2004,2005 Free Software Foundation, Inc. \ This file is part of Gforth. @@ -51,8 +51,12 @@ AUser CSP \G @code{system} command. : system ( c-addr u -- ) \ gforth -\G Pass the string specified by @var{c-addr u} to the host operating system -\G for execution in a sub-shell. +\G Pass the string specified by @var{c-addr u} to the host operating +\G system for execution in a sub-shell. The value of the environment +\G variable @code{GFORTHSYSTEMPREFIX} (or its default value) is +\G prepended to the string (mainly to support using @code{command.com} +\G as shell in Windows instead of whatever shell Cygwin uses by +\G default; @pxref{Environment variables}). (system) throw TO $? ; : sh ( "..." -- ) \ gforth @@ -98,19 +102,20 @@ AUser CSP ur compile-fliterals uw compile-literals target compile, POSTPONE exit reveal ; -: const-does> ( run-time: w*uw r*ur uw ur "name" -- ) - \G Defines @var{name} and returns.@sp 0 +: const-does> ( run-time: w*uw r*ur uw ur "name" -- ) \ gforth + \G Defines @var{name} and returns. + \G \G @var{name} execution: pushes @var{w*uw r*ur}, then performs the \G code following the @code{const-does>}. here >r 0 POSTPONE literal POSTPONE (const-does>) POSTPONE ; noname : POSTPONE rdrop - lastxt r> cell+ ! \ patch the literal + latestxt r> cell+ ! \ patch the literal ; immediate \ !! rewrite slurp-file using slurp-fid -: slurp-file ( c-addr1 u1 -- c-addr2 u2 ) +: slurp-file ( c-addr1 u1 -- c-addr2 u2 ) \ gforth \G @var{c-addr1 u1} is the filename, @var{c-addr2 u2} is the file's contents r/o bin open-file throw >r r@ file-size throw abort" file too large" @@ -118,8 +123,9 @@ AUser CSP 2dup r@ read-file throw over <> abort" could not read whole file" r> close-file throw ; -: slurp-fid { fid -- addr u } - \G @var{addr u} is the content of the file @var{fid} +: slurp-fid ( fid -- addr u ) \ gforth +\G @var{addr u} is the content of the file @var{fid} + { fid } 0 0 begin ( awhole uwhole ) dup 1024 + dup >r extend-mem ( anew awhole uwhole R: unew ) rot r@ fid read-file throw ( awhole uwhole uread R: unew ) @@ -134,35 +140,48 @@ AUser CSP : compile-literal ( n -- ) postpone literal ; +: compile-compile-literal ( n -- ) + compile-literal postpone compile-literal ; + +: compile-2literal ( n1 n2 -- ) + postpone 2literal ; + +: compile-compile-2literal ( n1 n2 -- ) + compile-2literal postpone compile-2literal ; + : [[ ( -- ) \G switch from postpone state to compile state \ this is only a marker; it is never really interpreted compile-only-error ; immediate -: postponer ( c-addr u -- ) +[ifdef] compiler1 +: postponer1 ( c-addr u -- ... xt ) 2dup find-name dup if ( c-addr u nt ) nip nip name>comp 2dup [comp'] [[ d= if - 2drop ['] compiler is parser + 2drop ['] compiler1 is parser1 ['] noop else - postpone, + ['] postpone, endif else drop - 2dup snumber? dup if + 2dup 2>r snumber? dup if 0> IF - swap postpone literal postpone compile-literal + ['] compile-compile-2literal + ELSE + ['] compile-compile-literal THEN - postpone Literal postpone compile-literal - 2drop + 2rdrop ELSE - drop no.extensions + drop 2r> no.extensions THEN then ; : ]] ( -- ) \ switch into postpone state - ['] postponer is parser state on ; immediate restrict + ['] postponer1 is parser1 state on ; immediate restrict + +[then] \ f.rdp @@ -181,6 +200,11 @@ AUser CSP ur nd - 1- dup { beforep } fsign + nexp 0 max >= and if \ fixed-point notation c-addr ur beforep nexp - dup { befored } '0 push-right + befored 1+ ur >= if \ <=1 digit left, will be pushed out by '.' + rf fabs f2* 0.1e nd s>d d>f f** f> if \ round last digit + '1 c-addr befored + 1- c! + endif + endif c-addr beforep 1- befored min dup { beforez } 0 max bl fill fsign if '- c-addr beforez 1- 0 max + c! @@ -210,7 +234,7 @@ AUser CSP endif 1 max ur min ; -: f>buf-rdp ( rf c-addr +nr nd np -- ) \ gforth +: f>buf-rdp ( rf c-addr +nr +nd +np -- ) \ gforth \G Convert @i{rf} into a string at @i{c-addr nr}. The conversion \G rules and the meanings of @i{nr nd np} are the same as for \G @code{f.rdp}. @@ -236,19 +260,21 @@ AUser CSP : f.rdp ( rf +nr +nd +np -- ) \ gforth \G Print float @i{rf} formatted. The total width of the output is -\G @i{nr}, the number of digits after the decimal point is @i{+nd}, -\G the minimum number of significant digits for fixed-point notation -\G is @i{np}. @code{Set-precision} has no effect on @code{f.rdp}. -\G Fixed-point notation is used if the number of siginicant digits -\G would be larger than @i{np} and if the number of digits before the -\G decimal point would fit. If fixed-point notation is not used, -\G exponential notation is used, and if that does not fit, asterisks -\G are printed. We recommend using @i{nr}>=7 to avoid the risk of -\G numbers not fitting at all. We recommend @i{nr}>=@i{np}+5 to avoid -\G cases where @code{f.rdp} switches to exponential notation because -\G fixed-point notation would have too few significant digits, yet -\G exponential notation offers fewer significant digits. We recomment -\G @i{nr}>=@i{nd}+2, if you want to have fixed-point notation for some +\G @i{nr}. For fixed-point notation, the number of digits after the +\G decimal point is @i{+nd} and the minimum number of significant +\G digits is @i{np}. @code{Set-precision} has no effect on +\G @code{f.rdp}. Fixed-point notation is used if the number of +\G siginicant digits would be at least @i{np} and if the number of +\G digits before the decimal point would fit. If fixed-point notation +\G is not used, exponential notation is used, and if that does not +\G fit, asterisks are printed. We recommend using @i{nr}>=7 to avoid +\G the risk of numbers not fitting at all. We recommend +\G @i{nr}>=@i{np}+5 to avoid cases where @code{f.rdp} switches to +\G exponential notation because fixed-point notation would have too +\G few significant digits, yet exponential notation offers fewer +\G significant digits. We recommend @i{nr}>=@i{nd}+2, if you want to +\G have fixed-point notation for some numbers. We recommend +\G @i{np}>@i{nr}, if you want to have exponential notation for all \G numbers. f>str-rdp type ; @@ -273,3 +299,55 @@ AUser CSP 10e f* loop ; [then] + +: f.s ( -- ) \ gforth f-dot-s + \G Display the number of items on the floating-point stack, + \G followed by a list of the items; TOS is the right-most item. + ." <" fdepth 0 .r ." > " fdepth 0 max maxdepth-.s @ min dup 0 + ?DO dup i - 1- floats fp@ + f@ 16 5 11 f.rdp space LOOP drop ; + +\ defer stuff + +[ifundef] defer@ : defer@ >body @ ; [then] + +:noname ' defer@ ; +:noname postpone ['] postpone defer@ ; +interpret/compile: action-of ( interpretation "name" -- xt; compilation "name" -- ; run-time -- xt ) \ gforth +\G @i{Xt} is the XT that is currently assigned to @i{name}. + +' action-of +comp' action-of drop +interpret/compile: what's ( interpretation "name" -- xt; compilation "name" -- ; run-time -- xt ) \ gforth-obsolete +\G Old name of @code{action-of} + + +: typewhite ( addr n -- ) \ gforth +\G Like type, but white space is printed instead of the characters. + \ bounds u+do + 0 max bounds ?do + i c@ #tab = if \ check for tab + #tab + else + bl + then + emit + loop ; + +\ w and l stuff + +environment-wordlist >order + +16 address-unit-bits / 1 max constant /w ( -- u ) \ gforth slash-w +\G address units for a 16-bit value + +32 address-unit-bits / 1 max constant /l ( -- u ) \ gforth slash-l +\G address units for a 32-bit value + +previous + +[ifdef] uw@ +\ Open firmware names +' uw@ alias w@ ( addr -- u ) +' ul@ alias l@ ( addr -- u ) +\ ' sw@ alias