version 1.11, 1999/03/23 20:24:20
|
version 1.48, 2006/01/28 17:55:32
|
Line 1
|
Line 1
|
\ miscelleneous words |
\ miscelleneous words |
|
|
\ Copyright (C) 1996,1997,1998 Free Software Foundation, Inc. |
\ Copyright (C) 1996,1997,1998,2000,2003,2004,2005 Free Software Foundation, Inc. |
|
|
\ This file is part of Gforth. |
\ This file is part of Gforth. |
|
|
Line 16
|
Line 16
|
|
|
\ 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. |
|
|
|
require glocals.fs |
|
|
' require alias needs ( ... "name" -- ... ) \ gforth |
' require alias needs ( ... "name" -- ... ) \ gforth |
\G An alias for @code{require}; exists on other systems (e.g., Win32Forth). |
\G An alias for @code{require}; exists on other systems (e.g., Win32Forth). |
Line 36 AUser CSP
|
Line 37 AUser CSP
|
|
|
\ DMIN and DMAX |
\ DMIN and DMAX |
|
|
: dmin ( d1 d2 -- d ) \ double |
: dmin ( d1 d2 -- d ) \ double d-min |
2over 2over d> IF 2swap THEN 2drop ; |
2over 2over d> IF 2swap THEN 2drop ; |
|
|
: dmax ( d1 d2 -- d ) \ double |
|
|
: dmax ( d1 d2 -- d ) \ double d-max |
2over 2over d< IF 2swap THEN 2drop ; |
2over 2over d< IF 2swap THEN 2drop ; |
|
|
\ shell commands |
\ shell commands |
|
|
0 Value $? ( -- n ) \ gforth dollar-question |
0 Value $? ( -- n ) \ gforth dollar-question |
\G VALUE: The exit status returned by the most recently executed |
\G @code{Value} -- the exit status returned by the most recently executed |
\G @code{system} command. |
\G @code{system} command. |
|
|
: system ( addr u -- ) \ gforth |
: system ( c-addr u -- ) \ gforth |
\G Pass the string specified by @var{c-addr, u} to the host operating system |
\G Pass the string specified by @var{c-addr u} to the host operating |
\G for execution in a sub-shell. |
\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 $? ; |
(system) throw TO $? ; |
|
|
: sh ( "..." -- ) \ gforth |
: sh ( "..." -- ) \ gforth |
Line 64 AUser CSP
|
Line 70 AUser CSP
|
\G equivalent to @code{] literal} |
\G equivalent to @code{] literal} |
] postpone literal ; |
] postpone literal ; |
|
|
|
[ifundef] in-dictionary? |
: in-dictionary? ( x -- f ) |
: in-dictionary? ( x -- f ) |
forthstart dictionary-end within ; |
forthstart dictionary-end within ; |
|
[endif] |
|
|
: in-return-stack? ( addr -- f ) |
: in-return-stack? ( addr -- f ) |
rp0 @ swap - [ forthstart 6 cells + ]L @ u< ; |
rp0 @ swap - [ forthstart 6 cells + ]L @ u< ; |
|
|
|
\ const-does> |
|
|
|
: compile-literals ( w*u u -- ; run-time: -- w*u ) recursive |
|
\ compile u literals, starting with the bottommost one |
|
?dup-if |
|
swap >r 1- compile-literals |
|
r> POSTPONE literal |
|
endif ; |
|
|
|
: compile-fliterals ( r*u u -- ; run-time: -- w*u ) recursive |
|
\ compile u fliterals, starting with the bottommost one |
|
?dup-if |
|
{ F: r } 1- compile-fliterals |
|
r POSTPONE fliteral |
|
endif ; |
|
|
|
: (const-does>) ( w*uw r*ur uw ur target "name" -- ) |
|
\ define a colon definition "name" containing w*uw r*ur as |
|
\ literals and a call to target. |
|
{ uw ur target } |
|
header docol: cfa, \ start colon def without stack junk |
|
ur compile-fliterals uw compile-literals |
|
target compile, POSTPONE exit reveal ; |
|
|
|
: 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 |
|
latestxt r> cell+ ! \ patch the literal |
|
; immediate |
|
|
|
\ !! rewrite slurp-file using slurp-fid |
|
: 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" |
|
dup allocate throw swap |
|
2dup r@ read-file throw over <> abort" could not read whole file" |
|
r> close-file throw ; |
|
|
|
: 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 ) |
|
r> 2dup = |
|
while ( awhole uwhole uread unew ) |
|
2drop |
|
repeat |
|
- + dup >r resize throw r> ; |
|
|
|
\ ]] ... [[ |
|
|
|
: 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 |
|
|
|
[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 ['] compiler1 is parser1 ['] noop |
|
else |
|
['] postpone, |
|
endif |
|
else |
|
drop |
|
2dup 2>r snumber? dup if |
|
0> IF |
|
['] compile-compile-2literal |
|
ELSE |
|
['] compile-compile-literal |
|
THEN |
|
2rdrop |
|
ELSE |
|
drop 2r> no.extensions |
|
THEN |
|
then ; |
|
|
|
: ]] ( -- ) |
|
\ switch into postpone state |
|
['] postponer1 is parser1 state on ; immediate restrict |
|
|
|
[then] |
|
|
|
\ f.rdp |
|
|
|
: push-right ( c-addr u1 u2 cfill -- ) |
|
\ move string at c-addr u1 right by u2 chars (without exceeding |
|
\ the original bound); fill the gap with cfill |
|
>r over min dup >r rot dup >r ( u1 u2 c-addr R: cfill u2 c-addr ) |
|
dup 2swap /string cmove> |
|
r> r> r> fill ; |
|
|
|
: f>buf-rdp-try { f: rf c-addr ur nd up um1 -- um2 } |
|
\ um1 is the mantissa length to try, um2 is the actual mantissa length |
|
c-addr ur um1 /string '0 fill |
|
rf c-addr um1 represent if { nexp fsign } |
|
nd nexp + up >= |
|
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! |
|
endif |
|
c-addr ur beforep /string 1 '. push-right |
|
nexp nd + |
|
else \ exponential notation |
|
c-addr ur 1 /string 1 '. push-right |
|
fsign if |
|
c-addr ur 1 '- push-right |
|
endif |
|
nexp 1- s>d tuck dabs <<# #s rot sign 'E hold #> { explen } |
|
ur explen - 1- fsign + { mantlen } |
|
mantlen 0< if \ exponent too large |
|
drop c-addr ur '* fill |
|
else |
|
c-addr ur + 0 explen negate /string move |
|
endif |
|
#>> mantlen |
|
endif |
|
else \ inf or nan |
|
if \ negative |
|
c-addr ur 1 '- push-right |
|
endif |
|
drop ur |
|
\ !! align in some way? |
|
endif |
|
1 max ur min ; |
|
|
|
: 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}. |
|
\ first, get the mantissa length, then convert for real. The |
|
\ mantissa length is wrong in a few cases because of different |
|
\ rounding; In most cases this does not matter, because the |
|
\ mantissa is shorter than expected and the final digits are 0; |
|
\ but in a few cases the mantissa gets longer. Then it is |
|
\ conceivable that you will see a result that is rounded too much. |
|
\ However, I have not been able to construct an example where this |
|
\ leads to an unexpected result. |
|
swap 0 max swap 0 max |
|
fdup 2over 2over 2 pick f>buf-rdp-try f>buf-rdp-try drop ; |
|
|
|
: f>str-rdp ( rf +nr +nd +np -- c-addr nr ) \ 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}. The result in in the pictured numeric output buffer |
|
\G and will be destroyed by anything destroying that buffer. |
|
rot holdptr @ 1- 0 rot negate /string ( rf +nd np c-addr nr ) |
|
over holdbuf u< -&17 and throw |
|
2tuck 2>r f>buf-rdp 2r> ; |
|
|
|
: f.rdp ( rf +nr +nd +np -- ) \ gforth |
|
\G Print float @i{rf} formatted. The total width of the output is |
|
\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 ; |
|
|
|
0 [if] |
|
: testx ( rf ur nd up -- ) |
|
'| emit f.rdp ; |
|
|
|
: test ( -- ) |
|
-0.123456789123456789e-20 |
|
40 0 ?do |
|
cr |
|
fdup 7 3 1 testx |
|
fdup 7 3 4 testx |
|
fdup 7 3 0 testx |
|
fdup 7 7 1 testx |
|
fdup 7 5 1 testx |
|
fdup 7 0 2 testx |
|
fdup 5 2 1 testx |
|
fdup 4 2 1 testx |
|
fdup 18 8 5 testx |
|
'| emit |
|
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@ |
|
|
|
[ifdef] uw@ |
|
' uw@ alias w@ ( addr -- u ) |
|
' ul@ alias l@ ( addr -- u ) |
|
\ ' sw@ alias <w@ ( addr -- n ) \ Open Firmware name |
|
[then] |