1: \ lib.fs shared library support package 16aug03py
2:
3: \ Copyright (C) 1995,1996,1997,1998,2000,2003,2005,2006,2007 Free Software Foundation, Inc.
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
9: \ as published by the Free Software Foundation; either version 2
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
18: \ along with this program; if not, write to the Free Software
19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
20:
21: Variable libs 0 libs !
22: \ links between libraries
23: Variable thisproc
24: Variable thislib
25:
26: Variable revdec revdec off
27: \ turn revdec on to compile bigFORTH libraries
28: Variable revarg revarg off
29: \ turn revarg on to compile declarations with reverse arguments
30: Variable legacy legacy off
31: \ turn legacy on to compile bigFORTH legacy libraries
32:
33: Vocabulary c-decl
34: Vocabulary cb-decl
35:
36: : @lib ( lib -- )
37: \G obtains library handle
38: cell+ dup 2 cells + count open-lib
39: dup 0= abort" Library not found" swap ! ;
40:
41: : @proc ( lib addr -- )
42: \G obtains symbol address
43: cell+ tuck cell+ @ count rot cell+ @
44: lib-sym dup 0= abort" Proc not found!" swap ! ;
45:
46: : proc, ( lib -- )
47: \G allocates and initializes proc stub
48: \G stub format:
49: \G linked list in library
50: \G address of proc
51: \G ptr to OS name of symbol as counted string
52: \G threaded code for invocation
53: here dup thisproc !
54: swap 2 cells + dup @ A, !
55: 0 , 0 A, ;
56:
57: Defer legacy-proc ' noop IS legacy-proc
58:
59: : proc: ( lib "name" -- )
60: \G Creates a named proc stub
61: Create proc, 0 also c-decl
62: legacy @ IF legacy-proc THEN
63: DOES> ( x1 .. xn -- r )
64: dup cell+ @ swap 3 cells + >r ;
65:
66: Variable ind-call ind-call off
67: : fptr ( "name" -- )
68: Create here thisproc ! 0 , 0 , 0 , 0 also c-decl ind-call on
69: DOES> 3 cells + >r ;
70:
71: : library ( "name" "file" -- )
72: \G loads library "file" and creates a proc defining word "name"
73: \G library format:
74: \G linked list of libraries
75: \G library handle
76: \G linked list of library's procs
77: \G OS name of library as counted string
78: Create here libs @ A, dup libs !
79: 0 , 0 A, parse-name string, @lib
80: DOES> ( -- ) dup thislib ! proc: ;
81:
82: : init-shared-libs ( -- )
83: defers 'cold
84: 0 libs BEGIN
85: @ dup WHILE
86: dup REPEAT
87: drop BEGIN
88: dup WHILE
89: >r
90: r@ @lib
91: r@ 2 cells + BEGIN
92: @ dup WHILE
93: r@ over @proc REPEAT
94: drop rdrop
95: REPEAT
96: drop ;
97:
98: ' init-shared-libs IS 'cold
99:
100: : argtype ( revxt pushxt fwxt "name" -- )
101: Create , , , ;
102:
103: : arg@ ( arg -- argxt pushxt )
104: revarg @ IF 2 cells + @ ['] noop swap ELSE 2@ THEN ;
105:
106: : arg, ( xt -- )
107: dup ['] noop = IF drop EXIT THEN compile, ;
108:
109: : decl, ( 0 arg1 .. argn call start -- )
110: 2@ compile, >r
111: revdec @ IF 0 >r
112: BEGIN dup WHILE >r REPEAT
113: BEGIN r> dup WHILE arg@ arg, REPEAT drop
114: BEGIN dup WHILE arg, REPEAT drop
115: ELSE 0 >r
116: BEGIN dup WHILE arg@ arg, >r REPEAT drop
117: BEGIN r> dup WHILE arg, REPEAT drop
118: THEN
119: r> compile, postpone EXIT ;
120:
121: : symbol, ( "c-symbol" -- )
122: here thisproc @ 2 cells + ! parse-name s,
123: thislib @ thisproc @ @proc ;
124:
125: : rettype ( endxt startxt "name" -- )
126: Create 2,
127: DOES> decl, ind-call @ 0= IF symbol, THEN
128: previous revarg off ind-call off ;
129:
130: also c-decl definitions
131:
132: : <rev> revarg on ;
133:
134: ' av-int ' av-int-r ' >r argtype int
135: ' av-float ' av-float-r ' f>l argtype sf
136: ' av-double ' av-double-r ' f>l argtype df
137: ' av-longlong ' av-longlong-r ' 2>r argtype dlong
138: ' av-ptr ' av-ptr-r ' >r argtype ptr
139:
140: ' av-call-void ' av-start-void rettype (void)
141: ' av-call-int ' av-start-int rettype (int)
142: ' av-call-float ' av-start-float rettype (sf)
143: ' av-call-double ' av-start-double rettype (fp)
144: ' av-call-longlong ' av-start-longlong rettype (dlong)
145: ' av-call-ptr ' av-start-ptr rettype (ptr)
146:
147: : (addr) postpone EXIT drop symbol, previous revarg off ;
148:
149: previous definitions
150:
151: \ legacy support for old library interfaces
152: \ interface to old vararg stuff not implemented yet
153:
154: also c-decl
155:
156: :noname ( n 0 -- 0 int1 .. intn )
157: legacy @ 0< revarg !
158: swap 0 ?DO int LOOP (int)
159: ; IS legacy-proc
160:
161: : (int) ( n -- )
162: >r ' execute r> 0 ?DO int LOOP (int) ;
163: : (void) ( n -- )
164: >r ' execute r> 0 ?DO int LOOP (void) ;
165: : (float) ( n -- )
166: >r ' execute r> 0 ?DO df LOOP (fp) ;
167:
168: previous
169:
170: \ callback stuff
171:
172: Variable callbacks
173: \G link between callbacks
174:
175: : callback ( -- )
176: Create 0 ] postpone >r also cb-decl
177: DOES>
178: Create here >r 0 , callbacks @ A, r@ callbacks !
179: swap postpone Literal postpone call , postpone EXIT
180: r> dup cell+ cell+ alloc-callback swap !
181: DOES> @ ;
182:
183: : callback; ( 0 xt1 .. xtn -- )
184: BEGIN over WHILE compile, REPEAT
185: postpone r> postpone execute compile, drop
186: postpone EXIT postpone [ previous ; immediate
187:
188: : va-ret ( xt xt -- )
189: Create A, A, immediate
190: DOES> 2@ compile, ;
191:
192: : init-callbacks ( -- )
193: defers 'cold callbacks 1 cells -
194: BEGIN cell+ @ dup WHILE dup cell+ cell+ alloc-callback over !
195: REPEAT drop ;
196:
197: ' init-callbacks IS 'cold
198:
199: also cb-decl definitions
200:
201: \ arguments
202:
203: ' va-arg-int Alias int
204: ' va-arg-float Alias sf
205: ' va-arg-double Alias df
206: ' va-arg-longlong Alias dlong
207: ' va-arg-ptr Alias ptr
208:
209: ' va-return-void ' va-start-void va-ret (void)
210: ' va-return-int ' va-start-int va-ret (int)
211: ' va-return-float ' va-start-float va-ret (sf)
212: ' va-return-double ' va-start-double va-ret (fp)
213: ' va-return-longlong ' va-start-longlong va-ret (dlong)
214: ' va-return-ptr ' va-start-ptr va-ret (ptr)
215:
216: previous definitions
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