version 1.32, 1999/02/03 00:10:20
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version 1.48, 2002/12/13 15:49:53
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\ EXTEND.FS CORE-EXT Word not fully tested! 12may93jaw |
\ EXTEND.FS CORE-EXT Word not fully tested! 12may93jaw |
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\ Copyright (C) 1995,1998 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1998,2000 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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\ May be cross-compiled |
\ May be cross-compiled |
Line 25 decimal
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Line 25 decimal
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\ .( 12may93jaw |
\ .( 12may93jaw |
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: .( ( "ccc<paren>" -- ) \ core-ext dot-paren |
: .( ( compilation,interpretation "ccc<paren>" -- ) \ core-ext dot-paren |
\G Parse a string ccc delimited by a ) (right parenthesis). Display |
\G Compilation and interpretation semantics: Parse a string @i{ccc} |
\G the string. This is often used to display progress information |
\G delimited by a @code{)} (right parenthesis). Display the |
\G during compilation. See examples below. |
\G string. This is often used to display progress information during |
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\G compilation; see examples below. |
[char] ) parse type ; immediate |
[char] ) parse type ; immediate |
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\ VALUE 2>R 2R> 2R@ 17may93jaw |
\ VALUE 2>R 2R> 2R@ 17may93jaw |
Line 36 decimal
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Line 37 decimal
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\ !! 2value |
\ !! 2value |
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: 2Literal ( compilation w1 w2 -- ; run-time -- w1 w2 ) \ double two-literal |
: 2Literal ( compilation w1 w2 -- ; run-time -- w1 w2 ) \ double two-literal |
\G Compile appropriate code such that, at run-time, cell pair w1, w2 are |
\G Compile appropriate code such that, at run-time, cell pair @i{w1, w2} are |
\G placed on the stack. Interpretation semantics are undefined. |
\G placed on the stack. Interpretation semantics are undefined. |
swap postpone Literal postpone Literal ; immediate restrict |
swap postpone Literal postpone Literal ; immediate restrict |
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' drop alias d>s ( d -- n ) \ double d_to_s |
' drop alias d>s ( d -- n ) \ double d_to_s |
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: m*/ ( d1 n2 u3 -- dqout ) \ double m-star-slash |
: m*/ ( d1 n2 u3 -- dquot ) \ double m-star-slash |
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\G dquot=(d1*n2)/u3, with the intermediate result being triple-precision. |
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\G In ANS Forth u3 can only be a positive signed number. |
>r s>d >r abs -rot |
>r s>d >r abs -rot |
s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um* |
s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um* |
swap >r 0 d+ r> -rot r@ um/mod -rot r> um/mod nip swap |
swap >r 0 d+ r> -rot r@ um/mod -rot r> um/mod nip swap |
Line 70 decimal
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Line 73 decimal
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\ C" 17may93jaw |
\ C" 17may93jaw |
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: (c") "lit ; |
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: CLiteral |
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postpone (c") here over char+ allot place align ; immediate restrict |
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: C" ( compilation "ccc<quote>" -- ; run-time -- c-addr ) \ core-ext c-quote |
: C" ( compilation "ccc<quote>" -- ; run-time -- c-addr ) \ core-ext c-quote |
\G Compilation: parse a string ccc delimited by a " (double quote). At |
\G Compilation: parse a string @i{ccc} delimited by a @code{"} |
\G run-time, return c-addr which specifies the counted string ccc. |
\G (double quote). At run-time, return @i{c-addr} which |
\G Interpretation semantics are undefined. |
\G specifies the counted string @i{ccc}. Interpretation |
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\G semantics are undefined. |
[char] " parse postpone CLiteral ; immediate restrict |
[char] " parse postpone CLiteral ; immediate restrict |
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\ [COMPILE] 17may93jaw |
\ [COMPILE] 17may93jaw |
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: [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile |
: [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile |
comp' drop compile, ; immediate |
comp' drop |
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dup [ comp' exit drop ] literal = if |
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execute \ EXIT has default compilation semantics, perform them |
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else |
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compile, |
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then ; immediate |
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\ CONVERT 17may93jaw |
\ CONVERT 17may93jaw |
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: convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext |
: convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext |
\G obsolescent; superseded by @code{>number}. |
\G OBSOLESCENT: superseded by @code{>number}. |
char+ true >number drop ; |
char+ true >number drop ; |
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\ ERASE 17may93jaw |
\ ERASE 17may93jaw |
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: erase ( addr len -- ) \ core-ext |
: erase ( addr u -- ) \ core-ext |
\G If len>0, clear all bits in each location of a memory region |
\G Clear all bits in @i{u} aus starting at @i{addr}. |
\G of len address units starting at address addr. |
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\ !! dependence on "1 chars 1 =" |
\ !! dependence on "1 chars 1 =" |
( 0 1 chars um/mod nip ) 0 fill ; |
( 0 1 chars um/mod nip ) 0 fill ; |
: blank ( addr len -- ) \ string |
: blank ( c-addr u -- ) \ string |
\G If len>0, store the character value for a space in each |
\G Store the space character into @i{u} chars starting at @i{c-addr}. |
\G location of a memory region |
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\G of len character units starting at address addr. |
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bl fill ; |
bl fill ; |
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\ SEARCH 02sep94py |
\ SEARCH 02sep94py |
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: search ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 flag ) \ string |
: search ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 flag ) \ string |
\G Search the string specified by c-addr1, u1 for the string |
\G Search the string specified by @i{c-addr1, u1} for the string |
\G speficied by c-addr2, u2. If flag is true: match was found |
\G specified by @i{c-addr2, u2}. If @i{flag} is true: match was found |
\G at c-addr3 with u3 characters remaining. If flag is false: |
\G at @i{c-addr3} with @i{u3} characters remaining. If @i{flag} is false: |
\G no match was found; c-addr3, u3 are equal to c-addr1, u1. |
\G no match was found; @i{c-addr3, u3} are equal to @i{c-addr1, u1}. |
\ not very efficient; but if we want efficiency, we'll do it as primitive |
\ not very efficient; but if we want efficiency, we'll do it as primitive |
2>r 2dup |
2>r 2dup |
begin |
begin |
Line 126 decimal
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Line 127 decimal
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\ SOURCE-ID SAVE-INPUT RESTORE-INPUT 11jun93jaw |
\ SOURCE-ID SAVE-INPUT RESTORE-INPUT 11jun93jaw |
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[IFUNDEF] source-id |
: source-id ( -- 0 | -1 | fileid ) \ core-ext,file source-i-d |
: source-id ( -- 0 | -1 | fileid ) \ core-ext,file source-i-d |
loadfile @ dup 0= IF drop sourceline# 0 min THEN ; |
\G Return 0 (the input source is the user input device), -1 (the |
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\G input source is a string being processed by @code{evaluate}) or |
: save-input ( -- x1 .. xn n ) \ core-ext |
\G a @i{fileid} (the input source is the file specified by |
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\G @i{fileid}). |
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loadfile @ dup 0= IF drop sourceline# 0 min THEN ; |
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: save-input ( -- xn .. x1 n ) \ core-ext |
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\G The @i{n} entries @i{xn - x1} describe the current state of the |
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\G input source specification, in some platform-dependent way that can |
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\G be used by @code{restore-input}. |
>in @ |
>in @ |
loadfile @ |
loadfile @ |
if |
if |
loadfile @ file-position throw |
loadfile @ file-position throw |
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[IFDEF] #fill-bytes #fill-bytes @ [ELSE] #tib @ 1+ [THEN] 0 d- |
else |
else |
blk @ |
blk @ |
linestart @ |
linestart @ |
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Line 153 decimal
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source-id |
source-id |
6 ; |
6 ; |
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: restore-input ( x1 .. xn n -- flag ) \ core-ext |
: restore-input ( xn .. x1 n -- flag ) \ core-ext |
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\G Attempt to restore the input source specification to the state |
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\G described by the @i{n} entries @i{xn - x1}. @i{flag} is |
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\G true if the restore fails. In Gforth it fails pretty often |
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\G (and sometimes with a @code{throw}). |
6 <> -12 and throw |
6 <> -12 and throw |
source-id <> -12 and throw |
source-id <> -12 and throw |
>tib ! |
>tib ! |
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Line 165 decimal
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loadfile @ 0<> |
loadfile @ 0<> |
if |
if |
loadfile @ reposition-file throw |
loadfile @ reposition-file throw |
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refill 0= -36 and throw \ should never throw |
else |
else |
linestart ! |
linestart ! |
blk ! |
blk ! |
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Line 177 decimal
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r> loadline ! |
r> loadline ! |
>in ! |
>in ! |
false ; |
false ; |
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[THEN] |
\ This things we don't need, but for being complete... jaw |
\ This things we don't need, but for being complete... jaw |
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\ EXPECT SPAN 17may93jaw |
\ EXPECT SPAN 17may93jaw |
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variable span ( -- a-addr ) \ core-ext |
variable span ( -- c-addr ) \ core-ext |
\ obsolescent |
\G @code{Variable} -- @i{c-addr} is the address of a cell that stores the |
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\G length of the last string received by @code{expect}. OBSOLESCENT. |
: expect ( c-addr +len -- ) \ core-ext |
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\ obsolescent; use accept |
: expect ( c-addr +n -- ) \ core-ext |
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\G Receive a string of at most @i{+n} characters, and store it |
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\G in memory starting at @i{c-addr}. The string is |
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\G displayed. Input terminates when the <return> key is pressed or |
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\G @i{+n} characters have been received. The normal Gforth line |
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\G editing capabilites are available. The length of the string is |
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\G stored in @code{span}; it does not include the <return> |
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\G character. OBSOLESCENT: superceeded by @code{accept}. |
0 rot over |
0 rot over |
BEGIN ( maxlen span c-addr pos1 ) |
BEGIN ( maxlen span c-addr pos1 ) |
key decode ( maxlen span c-addr pos2 flag ) |
key decode ( maxlen span c-addr pos2 flag ) |
Line 214 variable span ( -- a-addr ) \ core-ext
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Line 236 variable span ( -- a-addr ) \ core-ext
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REPEAT |
REPEAT |
drop |
drop |
\ remember udp |
\ remember udp |
udp @ , ; |
udp @ , |
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\ remember dyncode-ptr |
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here ['] noop , compile-prim1 finish-code ; |
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: marker! ( mark -- ) |
: marker! ( mark -- ) |
\ reset included files count; resize will happen on next add-included-file |
\ reset included files count; resize will happen on next add-included-file |
Line 241 variable span ( -- a-addr ) \ core-ext
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Line 265 variable span ( -- a-addr ) \ core-ext
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REPEAT |
REPEAT |
drop |
drop |
\ restore udp and dp |
\ restore udp and dp |
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dup cell+ @ forget-dyncode 0= abort" gforth bug" |
@ udp ! dp ! |
@ udp ! dp ! |
\ clean up vocabulary stack |
\ clean up vocabulary stack |
0 vp @ 0 |
0 vp @ 0 |
Line 254 variable span ( -- a-addr ) \ core-ext
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Line 279 variable span ( -- a-addr ) \ core-ext
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THEN ; |
THEN ; |
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: marker ( "<spaces> name" -- ) \ core-ext |
: marker ( "<spaces> name" -- ) \ core-ext |
\G Create a definition, @var{name} (called a @var{mark}) whose |
\G Create a definition, @i{name} (called a @i{mark}) whose |
\G execution semantics are to remove itself and everything |
\G execution semantics are to remove itself and everything |
\G defined after it. |
\G defined after it. |
marker, Create A, |
marker, Create A, |