[gforth] / gforth / fflib.fs  

gforth: gforth/fflib.fs

Diff for /gforth/fflib.fs between version 1.1 and 1.18

version 1.1, Fri Aug 15 21:45:46 2003 UTC version 1.18, Mon Dec 31 18:40:24 2007 UTC
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 \ lib.fs        shared library support package          11may97py  \ lib.fs        shared library support package          16aug03py
   
 \ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.  \ Copyright (C) 1995,1996,1997,1998,2000,2003,2005,2006,2007 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
 \ Gforth is free software; you can redistribute it and/or  \ Gforth is free software; you can redistribute it and/or
 \ modify it under the terms of the GNU General Public License  \ modify it under the terms of the GNU General Public License
 \ as published by the Free Software Foundation; either version 2  \ as published by the Free Software Foundation, either version 3
 \ of the License, or (at your option) any later version.  \ of the License, or (at your option) any later version.
   
 \ This program is distributed in the hope that it will be useful,  \ This program is distributed in the hope that it will be useful,
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 \ GNU General Public License for more details.  \ GNU General Public License for more details.
   
 \ 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, see http://www.gnu.org/licenses/.
 \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.  
   
 Variable libs 0 libs !  Variable libs 0 libs !
   \ links between libraries
 Variable thisproc  Variable thisproc
 Variable thislib  Variable thislib
 \G links between libraries  
   Variable revdec  revdec off
   \ turn revdec on to compile bigFORTH libraries
   Variable revarg  revarg off
   \ turn revarg on to compile declarations with reverse arguments
   Variable legacy  legacy off
   \ turn legacy on to compile bigFORTH legacy libraries
   
   Vocabulary c-decl
   Vocabulary cb-decl
   
 : @lib ( lib -- )  : @lib ( lib -- )
     \G obtains library handle      \G obtains library handle
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     swap 2 cells + dup @ A, !      swap 2 cells + dup @ A, !
     0 , 0 A, ;      0 , 0 A, ;
   
   Defer legacy-proc  ' noop IS legacy-proc
   
 : proc:  ( lib "name" -- )  : proc:  ( lib "name" -- )
     \G Creates a named proc stub      \G Creates a named proc stub
     Create proc, 0      Create proc, 0 also c-decl
       legacy @ IF  legacy-proc  THEN
 DOES> ( x1 .. xn -- r )  DOES> ( x1 .. xn -- r )
     dup cell+ @ swap 3 cells + >r ;      dup cell+ @ swap 3 cells + >r ;
   
   Variable ind-call ind-call off
   : fptr ( "name" -- )
       Create here thisproc ! 0 , 0 , 0 ,  0 also c-decl  ind-call on
       DOES>  3 cells + >r ;
   
 : library ( "name" "file" -- )  : library ( "name" "file" -- )
     \G loads library "file" and creates a proc defining word "name"      \G loads library "file" and creates a proc defining word "name"
     \G library format:      \G library format:
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     \G    linked list of library's procs      \G    linked list of library's procs
     \G    OS name of library as counted string      \G    OS name of library as counted string
     Create  here libs @ A, dup libs !      Create  here libs @ A, dup libs !
     0 , 0 A, bl sword string, @lib      0 , 0 A, parse-name string, @lib
 DOES> ( -- )  dup thislib ! proc: ;  DOES> ( -- )  dup thislib ! proc: ;
   
 : init-shared-libs ( -- )  : init-shared-libs ( -- )
     defers 'cold  libs      defers 'cold
     0  libs  BEGIN  @ dup  WHILE  dup  REPEAT  drop      0  libs  BEGIN
     BEGIN  dup  WHILE  >r          @ dup WHILE
               dup  REPEAT
       drop BEGIN
           dup  WHILE
               >r
         r@ @lib          r@ @lib
         r@ 2 cells +  BEGIN  @ dup  WHILE  r@ over @proc  REPEAT              r@ 2 cells +  BEGIN
                   @ dup  WHILE
                       r@ over @proc  REPEAT
         drop rdrop          drop rdrop
     REPEAT  drop ;      REPEAT
       drop ;
   
 ' init-shared-libs IS 'cold  ' init-shared-libs IS 'cold
   
 ' av-int AConstant int  : argtype ( revxt pushxt fwxt "name" -- )
 ' av-float AConstant sf      Create , , , ;
 ' av-double AConstant df  
 ' av-longlong AConstant llong  
 ' av-ptr AConstant ptr  
   
 Variable revdec  revdec off  : arg@ ( arg -- argxt pushxt )
 \ turn revdec on to compile bigFORTH libraries      revarg @ IF  2 cells + @ ['] noop swap  ELSE  2@  THEN ;
   
 : rettype ( endxt startxt "name" -- )  : arg, ( xt -- )
     create immediate 2,      dup ['] noop = IF  drop  EXIT  THEN  compile, ;
   DOES>  
   : decl, ( 0 arg1 .. argn call start -- )
     2@ compile, >r      2@ compile, >r
     revdec @ IF      revdec @ IF  0 >r
         0 >r  BEGIN  dup  WHILE  >r  REPEAT  drop          BEGIN  dup  WHILE  >r  REPEAT
         BEGIN  r> dup  WHILE  compile,  REPEAT  drop          BEGIN  r> dup  WHILE  arg@ arg,  REPEAT  drop
     ELSE          BEGIN  dup  WHILE  arg,  REPEAT drop
         BEGIN dup  WHILE  compile,  REPEAT  drop      ELSE  0 >r
           BEGIN  dup  WHILE  arg@ arg, >r REPEAT drop
           BEGIN  r> dup  WHILE  arg,  REPEAT  drop
     THEN      THEN
     r> compile,  postpone EXIT      r> compile,  postpone EXIT ;
     here thisproc @ 2 cells + ! bl sword s,  
   : symbol, ( "c-symbol" -- )
       here thisproc @ 2 cells + ! parse-name s,
     thislib @ thisproc @ @proc ;      thislib @ thisproc @ @proc ;
   
   : rettype ( endxt startxt "name" -- )
       Create 2,
     DOES>  decl, ind-call @ 0= IF  symbol,  THEN
       previous revarg off ind-call off ;
   
   also c-decl definitions
   
   : <rev>  revarg on ;
   
   ' av-int      ' av-int-r      ' >r  argtype int
   ' av-float    ' av-float-r    ' f>l argtype sf
   ' av-double   ' av-double-r   ' f>l argtype df
   ' av-longlong ' av-longlong-r ' 2>r argtype dlong
   ' av-ptr      ' av-ptr-r      ' >r  argtype ptr
   
 ' av-call-void ' av-start-void rettype (void)  ' av-call-void ' av-start-void rettype (void)
 ' av-call-int ' av-start-int rettype (int)  ' av-call-int ' av-start-int rettype (int)
 ' av-call-float ' av-start-float rettype (sf)  ' av-call-float ' av-start-float rettype (sf)
 ' av-call-double ' av-start-double rettype (fp)  ' av-call-double ' av-start-double rettype (fp)
 ' av-call-longlong ' av-start-longlong rettype (llong)  ' av-call-longlong ' av-start-longlong rettype (dlong)
 ' av-call-ptr ' av-start-ptr rettype (ptr)  ' av-call-ptr ' av-start-ptr rettype (ptr)
   
 \ compatibility layer for old library -- use is deprecated  : (addr)  postpone EXIT drop symbol, previous revarg off ;
   
 Variable legacy  previous definitions
   
 \ turn legacy on for old library  \ legacy support for old library interfaces
   \ interface to old vararg stuff not implemented yet
   
 warnings @ warnings off  also c-decl
   
   :noname ( n 0 -- 0 int1 .. intn )
       legacy @ 0< revarg !
       swap 0 ?DO  int  LOOP  (int)
   ; IS legacy-proc
   
 : (int) ( n -- )  : (int) ( n -- )
     legacy @ IF      >r ' execute r> 0 ?DO  int  LOOP  (int) ;
         >r ' execute r> 0 ?DO  int  LOOP  
     THEN  (int) ;  
 : (void) ( n -- )  : (void) ( n -- )
     legacy @ IF      >r ' execute r> 0 ?DO  int  LOOP  (void) ;
         >r ' execute r> 0 ?DO  int  LOOP  
     THEN  (void) ;  
 : (float) ( n -- )  : (float) ( n -- )
     legacy @ IF      >r ' execute r> 0 ?DO  df   LOOP  (fp) ;
         >r ' execute r> 0 ?DO  df  LOOP  
     THEN  (df) ;  previous
   
   \ callback stuff
   
 warnings on  Variable callbacks
   \G link between callbacks
   
 [ifdef] testing  : callback ( -- )
       Create  0 ] postpone >r also cb-decl
     DOES>
       Create here >r 0 , callbacks @ A, r@ callbacks !
       swap postpone Literal postpone call , postpone EXIT
       r> dup cell+ cell+ alloc-callback swap !
     DOES> @ ;
   
   : callback; ( 0 xt1 .. xtn -- )
       BEGIN  over  WHILE  compile,  REPEAT
       postpone r> postpone execute compile, drop
       postpone EXIT postpone [ previous ; immediate
   
   : va-ret ( xt xt -- )
       Create A, A, immediate
     DOES> 2@ compile, ;
   
   : init-callbacks ( -- )
       defers 'cold  callbacks 1 cells -
       BEGIN  cell+ @ dup  WHILE  dup cell+ cell+ alloc-callback over !
       REPEAT  drop ;
   
 library libc /lib/libc.so.6  ' init-callbacks IS 'cold
   
 libc sleep int (int) sleep  also cb-decl definitions
 libc open  int int ptr (int) open  
 libc lseek int llong int (llong) lseek  
 libc read  int ptr int (int) read  
 libc close int (int) close  
   
 library libm /lib/libm.so.6  \ arguments
   
 libm fmodf sf sf (sf) fmodf  ' va-arg-int      Alias int
 libm fmod  df df (fp) fmod  ' va-arg-float    Alias sf
   ' va-arg-double   Alias df
   ' va-arg-longlong Alias dlong
   ' va-arg-ptr      Alias ptr
   
   ' va-return-void     ' va-start-void     va-ret (void)
   ' va-return-int      ' va-start-int      va-ret (int)
   ' va-return-float    ' va-start-float    va-ret (sf)
   ' va-return-double   ' va-start-double   va-ret (fp)
   ' va-return-longlong ' va-start-longlong va-ret (dlong)
   ' va-return-ptr      ' va-start-ptr      va-ret (ptr)
   
 [then]  previous definitions

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