Annotation of gforth/oldlib.fs, revision 1.7

1.1       pazsan      1: \ lib.fs       shared library support package          11may97py
                      2: 
1.6       anton       3: \ Copyright (C) 1995,1996,1997,1998,2000,2003,2005,2007 Free Software Foundation, Inc.
1.1       pazsan      4: 
                      5: \ This file is part of Gforth.
                      6: 
                      7: \ Gforth is free software; you can redistribute it and/or
                      8: \ modify it under the terms of the GNU General Public License
1.7     ! anton       9: \ as published by the Free Software Foundation, either version 3
1.1       pazsan     10: \ of the License, or (at your option) any later version.
                     11: 
                     12: \ This program is distributed in the hope that it will be useful,
                     13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: \ GNU General Public License for more details.
                     16: 
                     17: \ You should have received a copy of the GNU General Public License
1.7     ! anton      18: \ along with this program. If not, see http://www.gnu.org/licenses/.
1.1       pazsan     19: 
                     20: Create icall-table
                     21:     ] icall0 ;s icall1 ;s icall2 ;s icall3 ;s icall4 ;s icall5 ;s icall6 ;s
                     22:       NIL swap  NIL swap  NIL swap  NIL swap  NIL swap  NIL swap  NIL swap
                     23:       NIL swap  NIL swap  NIL swap  NIL swap  NIL swap  NIL swap  icall20 ;s [
                     24: Create fcall-table
                     25:     ] fcall0 ;s fcall1 ;s fcall2 ;s fcall3 ;s fcall4 ;s fcall5 ;s fcall6 ;s
                     26:       NIL swap  NIL swap  NIL swap  NIL swap  NIL swap  NIL swap  NIL swap
                     27:       NIL swap  NIL swap  NIL swap  NIL swap  NIL swap  NIL swap  fcall20 ;s [
                     28: 
                     29: Variable libs 0 libs !
                     30: \G links between libraries
                     31: 
1.3       pazsan     32: Variable legacy  legacy off
                     33: 
1.1       pazsan     34: : @lib ( lib -- )
                     35:     \G obtains library handle
                     36:     cell+ dup 2 cells + count open-lib
                     37:     dup 0= abort" Library not found" swap ! ;
                     38: 
                     39: : @proc ( lib addr -- )
                     40:     \G obtains symbol address
                     41:     cell+ tuck 2 cells + count rot cell+ @
                     42:     lib-sym  dup 0= abort" Proc not found!" swap cell+ ! ;
                     43: 
1.5       pazsan     44: -1 Constant <addr>
                     45:  0 Constant <int>
                     46:  1 Constant <float>
                     47:  2 Constant <void>
                     48:  4 Constant <int...>
                     49:  5 Constant <float...>
                     50:  6 Constant <void...>
1.3       pazsan     51: 
1.1       pazsan     52: : proc, ( pars type lib addr -- )
                     53:     \G allocates and initializes proc stub
                     54:     \G stub format:
                     55:     \G    linked list in library
                     56:     \G    address of proc
                     57:     \G    offset in lcall1-table to call proc
                     58:     \G    OS name of symbol as counted string
1.3       pazsan     59:     legacy @ IF  (int) -rot  THEN
1.1       pazsan     60:     here 2dup swap 2 cells + dup @ A, !
                     61:     2swap  1 and  IF  fcall-table  ELSE  icall-table  THEN  swap
                     62:     cells 2* + , 0 , bl sword string, @proc ;
                     63: 
                     64: : proc:  ( pars type lib "name" "string" -- )
                     65:     \G Creates a named proc stub
                     66:     Create proc,
                     67: DOES> ( x1 .. xn -- r )
                     68:     cell+ 2@ >r ;
                     69: 
                     70: : vaproc:  ( pars type lib "name" "string" -- )
                     71:     \G Creates a named proc stub with variable arguments
                     72:     Create proc,
                     73: DOES> ( x1 .. xn n -- r )
                     74:     cell+ 2@ rot 2* cells + >r ;
                     75: 
                     76: : (>void)  >r ;
                     77: 
                     78: : vproc:  ( pars type lib "name" "string" -- )
                     79:     \G Creates a named proc stub for void functions
                     80:     Create proc,
                     81: DOES> ( x1 .. xn -- )
                     82:     cell+ 2@ (>void) drop ;
                     83: 
                     84: : vvaproc:  ( pars type lib "name" "string" -- )
                     85:     \G Creates a named proc stub with variable arguments, void return
                     86:     Create proc,
                     87: DOES> ( x1 .. xn n -- )
                     88:     cell+ 2@ rot 2* cells + (>void) drop ;
                     89: 
                     90: : label: ( type lib "name" "string" -- )
                     91:     \G Creates a named label stub
                     92:     -1 -rot Create proc,
                     93: DOES> ( -- addr )
                     94:     [ 2 cells ] Literal + @ ;
                     95: 
                     96: : library ( "name" "file" -- )
                     97:     \G loads library "file" and creates a proc defining word "name"
                     98:     \G library format:
                     99:     \G    linked list of libraries
                    100:     \G    library handle
                    101:     \G    linked list of library's procs
                    102:     \G    OS name of library as counted string
                    103:     Create  here libs @ A, dup libs !
                    104:     0 , 0 A, bl sword string, @lib
                    105: DOES> ( pars/ type -- )
                    106:     over -1 = IF  label:
                    107:     ELSE
                    108:        over 4 and IF
                    109:            over 2 and IF  vvaproc:  ELSE  vaproc:  THEN
                    110:        ELSE
                    111:            over 2 and IF  vproc:  ELSE  proc:  THEN
                    112:        THEN
                    113:     THEN ;
                    114: 
                    115: : init-shared-libs ( -- )
                    116:     defers 'cold  libs
                    117:     0  libs  BEGIN  @ dup  WHILE  dup  REPEAT  drop
                    118:     BEGIN  dup  WHILE  >r
                    119:        r@ @lib
                    120:        r@ 2 cells +  BEGIN  @ dup  WHILE  r@ over @proc  REPEAT
                    121:        drop rdrop
                    122:     REPEAT  drop ;
                    123: 
                    124: ' init-shared-libs IS 'cold

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>