version 1.29, 1997/12/01 21:15:02
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version 1.32, 1999/02/03 00:10:20
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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 Free Software Foundation, Inc. |
\ Copyright (C) 1995,1998 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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Line 25 decimal
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Line 25 decimal
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\ .( 12may93jaw |
\ .( 12may93jaw |
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: .( ( compilation "...<paren>" -- ) \ core-ext dot-paren |
: .( ( "ccc<paren>" -- ) \ core-ext dot-paren |
[char] ) parse type ; immediate |
\G Parse a string ccc delimited by a ) (right parenthesis). Display |
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\G the string. This is often used to display progress information |
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\G during compilation. See examples below. |
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[char] ) parse type ; immediate |
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\ VALUE 2>R 2R> 2R@ 17may93jaw |
\ VALUE 2>R 2R> 2R@ 17may93jaw |
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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 |
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\G Compile appropriate code such that, at run-time, cell pair w1, w2 are |
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\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 |
Line 70 decimal
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Line 75 decimal
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: CLiteral |
: CLiteral |
postpone (c") here over char+ allot place align ; immediate restrict |
postpone (c") here over char+ allot place align ; immediate restrict |
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: C" ( compilation "...<quote>" -- ; run-time -- c-addr ) \ core-ext c-quote |
: C" ( compilation "ccc<quote>" -- ; run-time -- c-addr ) \ core-ext c-quote |
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\G Compilation: parse a string ccc delimited by a " (double quote). At |
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\G run-time, return c-addr which specifies the counted string ccc. |
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\G Interpretation semantics are undefined. |
[char] " parse postpone CLiteral ; immediate restrict |
[char] " parse postpone CLiteral ; immediate restrict |
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\ [COMPILE] 17may93jaw |
\ [COMPILE] 17may93jaw |
Line 87 decimal
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Line 95 decimal
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\ ERASE 17may93jaw |
\ ERASE 17may93jaw |
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: erase ( addr len -- ) \ core-ext |
: erase ( addr len -- ) \ core-ext |
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\G If len>0, clear all bits in each location of a memory region |
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\G of len address units starting at address addr. |
\ !! 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 ( addr len -- ) \ string |
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\G If len>0, store the character value for a space in each |
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\G location of a memory region |
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\G of len character units starting at address addr. |
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 |
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\G Search the string specified by c-addr1, u1 for the string |
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\G speficied by c-addr2, u2. If flag is true: match was found |
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\G at c-addr3 with u3 characters remaining. If flag is false: |
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\G no match was found; c-addr3, u3 are equal to 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 168 variable span ( -- a-addr ) \ core-ext
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Line 185 variable span ( -- a-addr ) \ core-ext
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\ Marker creates a mark that is removed (including everything |
\ Marker creates a mark that is removed (including everything |
\ defined afterwards) when executing the mark. |
\ defined afterwards) when executing the mark. |
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: marker, ( -- mark ) here dup A, |
: included-files-mark ( -- u ) |
voclink @ A, voclink |
included-files 2@ nip |
BEGIN @ dup WHILE dup 0 wordlist-link - @ A, REPEAT drop |
blk @ 0= |
udp @ , ; |
if \ not input from blocks |
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source-id 1 -1 within |
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if \ input from file |
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1- \ do not include the last file (hopefully this is the |
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\ currently included file) |
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then |
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then ; |
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\ hmm, most of the saving appears to be pretty unnecessary: we could |
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\ derive the wordlists and the words that have to be kept from the |
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\ saved value of dp value. - anton |
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: marker, ( -- mark ) |
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here |
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included-files-mark , |
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dup A, \ here |
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voclink @ A, \ vocabulary list start |
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\ for all wordlists, remember wordlist-id (the linked list) |
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voclink |
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BEGIN |
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@ dup |
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WHILE |
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dup 0 wordlist-link - wordlist-id @ A, |
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REPEAT |
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drop |
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\ remember udp |
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udp @ , ; |
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: marker! ( mark -- ) |
: marker! ( mark -- ) |
dup @ swap cell+ |
\ reset included files count; resize will happen on next add-included-file |
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included-files 2@ drop over @ included-files 2! cell+ |
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\ rest of marker! |
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dup @ swap cell+ ( here rest-of-marker ) |
dup @ voclink ! cell+ |
dup @ voclink ! cell+ |
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\ restore wordlists to former words |
voclink |
voclink |
BEGIN |
BEGIN |
@ dup |
@ dup |
WHILE |
WHILE |
over @ over 0 wordlist-link - ! |
over @ over 0 wordlist-link - wordlist-id ! |
swap cell+ swap |
swap cell+ swap |
REPEAT |
REPEAT |
drop voclink |
drop |
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\ rehash wordlists to remove forgotten words |
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\ why don't we do this in a single step? - anton |
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voclink |
BEGIN |
BEGIN |
@ dup |
@ dup |
WHILE |
WHILE |
dup 0 wordlist-link - rehash |
dup 0 wordlist-link - rehash |
REPEAT |
REPEAT |
drop |
drop |
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\ restore udp and dp |
@ udp ! dp ! |
@ udp ! dp ! |
\ clean up vocabulary stack |
\ clean up vocabulary stack |
0 vp @ 0 |
0 vp @ 0 |
Line 202 variable span ( -- a-addr ) \ core-ext
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Line 253 variable span ( -- a-addr ) \ core-ext
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forth-wordlist set-current |
forth-wordlist set-current |
THEN ; |
THEN ; |
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: marker ( "mark" -- ) |
: marker ( "<spaces> name" -- ) \ core-ext |
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\G Create a definition, @var{name} (called a @var{mark}) whose |
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\G execution semantics are to remove itself and everything |
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\G defined after it. |
marker, Create A, |
marker, Create A, |
DOES> ( -- ) |
DOES> ( -- ) |
@ marker! ; |
@ marker! ; |