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| 1 : | anton | 1.1 | \ libcc.fs foreign function interface implemented using a C compiler |
| 2 : | |||
| 3 : | \ Copyright (C) 2006 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 : | |||
| 22 : | \ What this implementation does is this: if it sees a declaration like | ||
| 23 : | |||
| 24 : | anton | 1.2 | \ \ something that tells it to include <unistd.h> |
| 25 : | \ \ something that tells it that the current library is libc | ||
| 26 : | |||
| 27 : | \ c-function dlseek lseek n d n -- d | ||
| 28 : | anton | 1.1 | |
| 29 : | \ it genererates C code similar to the following: | ||
| 30 : | |||
| 31 : | \ #include <gforth.h> | ||
| 32 : | anton | 1.2 | \ #include <unistd.h> |
| 33 : | anton | 1.1 | \ |
| 34 : | anton | 1.2 | \ void gforth_c_lseek_ndn_d(void) |
| 35 : | anton | 1.1 | \ { |
| 36 : | \ Cell *sp = gforth_SP; | ||
| 37 : | \ Float *fp = gforth_FP; | ||
| 38 : | anton | 1.2 | \ long long result; /* longest type in C */ |
| 39 : | \ gforth_ll2d(lseek(sp[3],gforth_d2ll(sp[2],sp[1]),sp[0]),sp[3],sp[2]); | ||
| 40 : | \ gforth_SP = sp+2; | ||
| 41 : | anton | 1.1 | \ } |
| 42 : | |||
| 43 : | \ Then it compiles this code and dynamically links it into the Gforth | ||
| 44 : | \ system (batching and caching are future work). It also dynamically | ||
| 45 : | \ links lseek. Performing DLSEEK then puts the function pointer of | ||
| 46 : | anton | 1.2 | \ the function pointer of gforth_c_lseek_ndn_d on the stack and |
| 47 : | \ calls CALL-C. | ||
| 48 : | |||
| 49 : | \ other things to do: | ||
| 50 : | |||
| 51 : | \ c-variable forth-name c-name | ||
| 52 : | \ c-constant forth-name c-name | ||
| 53 : | |||
| 54 : | |||
| 55 : | \ data structures | ||
| 56 : | |||
| 57 : | \ c-function word body: | ||
| 58 : | \ cell function pointer | ||
| 59 : | \ char return type index | ||
| 60 : | \ char parameter count n | ||
| 61 : | \ char*n parameters (type indices) | ||
| 62 : | \ counted string: c-name | ||
| 63 : | |||
| 64 : | anton | 1.3 | : .nb ( n -- ) |
| 65 : | anton | 1.2 | 0 .r ; |
| 66 : | |||
| 67 : | : const+ ( n1 "name" -- n2 ) | ||
| 68 : | dup constant 1+ ; | ||
| 69 : | |||
| 70 : | anton | 1.5 | \ dlerror |
| 71 : | |||
| 72 : | \ require lib.fs | ||
| 73 : | |||
| 74 : | \ library libc libc.so.6 | ||
| 75 : | \ libc sleep int (int) sleep | ||
| 76 : | \ libc dlerror (ptr) dlerror | ||
| 77 : | |||
| 78 : | anton | 1.2 | wordlist constant libcc-types |
| 79 : | |||
| 80 : | get-current libcc-types set-current | ||
| 81 : | |||
| 82 : | \ index values | ||
| 83 : | -1 | ||
| 84 : | const+ -- \ end of arguments | ||
| 85 : | const+ n \ integer cell | ||
| 86 : | anton | 1.5 | const+ a \ address cell |
| 87 : | anton | 1.2 | const+ d \ double |
| 88 : | const+ r \ float | ||
| 89 : | const+ func \ C function pointer | ||
| 90 : | const+ void | ||
| 91 : | drop | ||
| 92 : | |||
| 93 : | set-current | ||
| 94 : | |||
| 95 : | : parse-libcc-type ( "libcc-type" -- u ) | ||
| 96 : | parse-name libcc-types search-wordlist 0= -13 and throw execute ; | ||
| 97 : | |||
| 98 : | : parse-function-types ( "{libcc-type}" "--" "libcc-type" -- ) | ||
| 99 : | here 2 chars allot here begin | ||
| 100 : | parse-libcc-type dup 0>= while | ||
| 101 : | c, | ||
| 102 : | repeat | ||
| 103 : | anton | 1.3 | drop here swap - over char+ c! |
| 104 : | parse-libcc-type dup 0< -32 and throw swap c! ; | ||
| 105 : | anton | 1.2 | |
| 106 : | : type-letter ( n -- c ) | ||
| 107 : | anton | 1.5 | chars s" nadrfv" drop + c@ ; |
| 108 : | anton | 1.2 | |
| 109 : | \ count-stacks | ||
| 110 : | |||
| 111 : | : count-stacks-n ( fp-change1 sp-change1 -- fp-change2 sp-change2 ) | ||
| 112 : | 1+ ; | ||
| 113 : | |||
| 114 : | anton | 1.5 | : count-stacks-a ( fp-change1 sp-change1 -- fp-change2 sp-change2 ) |
| 115 : | anton | 1.2 | 1+ ; |
| 116 : | |||
| 117 : | : count-stacks-d ( fp-change1 sp-change1 -- fp-change2 sp-change2 ) | ||
| 118 : | 2 + ; | ||
| 119 : | |||
| 120 : | : count-stacks-r ( fp-change1 sp-change1 -- fp-change2 sp-change2 ) | ||
| 121 : | swap 1+ swap ; | ||
| 122 : | |||
| 123 : | : count-stacks-func ( fp-change1 sp-change1 -- fp-change2 sp-change2 ) | ||
| 124 : | 1+ ; | ||
| 125 : | |||
| 126 : | : count-stacks-void ( fp-change1 sp-change1 -- fp-change2 sp-change2 ) | ||
| 127 : | ; | ||
| 128 : | |||
| 129 : | create count-stacks-types | ||
| 130 : | ' count-stacks-n , | ||
| 131 : | anton | 1.5 | ' count-stacks-a , |
| 132 : | anton | 1.2 | ' count-stacks-d , |
| 133 : | ' count-stacks-r , | ||
| 134 : | ' count-stacks-func , | ||
| 135 : | ' count-stacks-void , | ||
| 136 : | |||
| 137 : | : count-stacks ( pars -- fp-change sp-change ) | ||
| 138 : | \ pars is an addr u pair | ||
| 139 : | 0 0 2swap over + swap u+do | ||
| 140 : | anton | 1.3 | i c@ cells count-stacks-types + @ execute |
| 141 : | anton | 1.2 | loop ; |
| 142 : | |||
| 143 : | \ gen-pars | ||
| 144 : | |||
| 145 : | : gen-par-n ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 ) | ||
| 146 : | anton | 1.5 | ." sp[" 1- dup .nb ." ]" ; |
| 147 : | anton | 1.2 | |
| 148 : | anton | 1.5 | : gen-par-a ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 ) |
| 149 : | anton | 1.2 | ." (void *)(" gen-par-n ." )" ; |
| 150 : | |||
| 151 : | : gen-par-d ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 ) | ||
| 152 : | anton | 1.4 | ." gforth_d2ll(" gen-par-n ." ," gen-par-n ." )" ; |
| 153 : | anton | 1.2 | |
| 154 : | : gen-par-r ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 ) | ||
| 155 : | anton | 1.3 | swap 1- tuck ." fp[" .nb ." ]" ; |
| 156 : | anton | 1.2 | |
| 157 : | : gen-par-func ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 ) | ||
| 158 : | anton | 1.5 | gen-par-a ; |
| 159 : | anton | 1.2 | |
| 160 : | : gen-par-void ( fp-depth1 sp-depth1 -- fp-depth2 sp-depth2 ) | ||
| 161 : | -32 throw ; | ||
| 162 : | |||
| 163 : | create gen-par-types | ||
| 164 : | ' gen-par-n , | ||
| 165 : | anton | 1.5 | ' gen-par-a , |
| 166 : | anton | 1.2 | ' gen-par-d , |
| 167 : | ' gen-par-r , | ||
| 168 : | ' gen-par-func , | ||
| 169 : | ' gen-par-void , | ||
| 170 : | |||
| 171 : | : gen-par ( fp-depth1 sp-depth1 partype -- fp-depth2 sp-depth2 ) | ||
| 172 : | anton | 1.3 | cells gen-par-types + @ execute ; |
| 173 : | anton | 1.2 | |
| 174 : | \ the call itself | ||
| 175 : | |||
| 176 : | : gen-wrapped-call { d: pars d: c-name fp-change1 sp-change1 -- } | ||
| 177 : | c-name type ." (" | ||
| 178 : | anton | 1.3 | fp-change1 sp-change1 pars over + swap u+do |
| 179 : | anton | 1.2 | i c@ gen-par |
| 180 : | i 1+ i' < if | ||
| 181 : | ." ," | ||
| 182 : | endif | ||
| 183 : | loop | ||
| 184 : | 2drop ." )" ; | ||
| 185 : | |||
| 186 : | \ calls for various kinds of return values | ||
| 187 : | |||
| 188 : | : gen-wrapped-void ( pars c-name fp-change1 sp-change1 -- fp-change sp-change ) | ||
| 189 : | 2dup 2>r gen-wrapped-call 2r> ; | ||
| 190 : | |||
| 191 : | anton | 1.3 | : gen-wrapped-n ( pars c-name fp-change1 sp-change1 -- fp-change sp-change ) |
| 192 : | anton | 1.5 | 2dup gen-par-n 2>r ." =" gen-wrapped-call 2r> ; |
| 193 : | anton | 1.3 | |
| 194 : | anton | 1.5 | : gen-wrapped-a ( pars c-name fp-change1 sp-change1 -- fp-change sp-change ) |
| 195 : | 2dup gen-par-n 2>r ." =(Cell)" gen-wrapped-call 2r> ; | ||
| 196 : | anton | 1.3 | |
| 197 : | : gen-wrapped-d ( pars c-name fp-change1 sp-change1 -- fp-change sp-change ) | ||
| 198 : | ." gforth_ll2d(" gen-wrapped-void | ||
| 199 : | anton | 1.5 | ." ," gen-par-n ." ," gen-par-n ." )" ; |
| 200 : | anton | 1.3 | |
| 201 : | : gen-wrapped-r ( pars c-name fp-change1 sp-change1 -- fp-change sp-change ) | ||
| 202 : | anton | 1.5 | 2dup gen-par-r 2>r ." =" gen-wrapped-void 2r> ; |
| 203 : | anton | 1.3 | |
| 204 : | : gen-wrapped-func ( pars c-name fp-change1 sp-change1 -- fp-change sp-change ) | ||
| 205 : | anton | 1.5 | gen-wrapped-a ; |
| 206 : | anton | 1.3 | |
| 207 : | anton | 1.2 | create gen-wrapped-types |
| 208 : | ' gen-wrapped-n , | ||
| 209 : | anton | 1.5 | ' gen-wrapped-a , |
| 210 : | anton | 1.2 | ' gen-wrapped-d , |
| 211 : | ' gen-wrapped-r , | ||
| 212 : | ' gen-wrapped-func , | ||
| 213 : | ' gen-wrapped-void , | ||
| 214 : | |||
| 215 : | : gen-wrapped-stmt ( pars c-name fp-change1 sp-change1 ret -- fp-change sp-change ) | ||
| 216 : | anton | 1.3 | cells gen-wrapped-types + @ execute ; |
| 217 : | anton | 1.2 | |
| 218 : | : gen-wrapper-function ( addr -- ) | ||
| 219 : | \ addr points to the return type index of a c-function descriptor | ||
| 220 : | c@+ { ret } count 2dup { d: pars } chars + count { d: c-name } | ||
| 221 : | anton | 1.5 | .\" #include \"engine/libcc.h\"\n" |
| 222 : | anton | 1.2 | ." void gforth_c_" c-name type ." _" |
| 223 : | anton | 1.5 | pars bounds u+do |
| 224 : | i c@ type-letter emit | ||
| 225 : | anton | 1.2 | loop |
| 226 : | ." _" ret type-letter emit .\" (void)\n" | ||
| 227 : | anton | 1.4 | .\" {\n Cell MAYBE_UNUSED *sp = gforth_SP;\n Float MAYBE_UNUSED *fp = gforth_FP;\n " |
| 228 : | anton | 1.2 | pars c-name 2over count-stacks ret gen-wrapped-stmt .\" ;\n" |
| 229 : | ?dup-if | ||
| 230 : | anton | 1.3 | ." gforth_SP = sp+" .nb .\" ;\n" |
| 231 : | anton | 1.2 | endif |
| 232 : | ?dup-if | ||
| 233 : | anton | 1.3 | ." gforth_FP = fp+" .nb .\" ;\n" |
| 234 : | anton | 1.2 | endif |
| 235 : | anton | 1.3 | .\" }\n" ; |
| 236 : | anton | 1.2 | |
| 237 : | anton | 1.5 | : compile-wrapper-function ( -- ) |
| 238 : | s" gcc -fPIC -shared -Wl,-soname,xxx.so.1 -Wl,-export_dynamic -o xxx.so.1 -O xxx.c" system | ||
| 239 : | $? abort" compiler generated error" ; | ||
| 240 : | \ s" ar rcs xxx.a xxx.o" system | ||
| 241 : | \ $? abort" ar generated error" ; | ||
| 242 : | |||
| 243 : | : link-wrapper-function ( -- ) | ||
| 244 : | s" /home/anton/gforth/xxx.so.1" open-lib ( lib-handle ) | ||
| 245 : | s" gforth_c_strlen_a_n" rot lib-sym dup 0= -32 and throw ; | ||
| 246 : | |||
| 247 : | anton | 1.2 | : c-function ( "forth-name" "c-name" "{libcc-type}" "--" "libcc-type" -- ) |
| 248 : | create here >r 0 , \ place for the wrapper function pointer | ||
| 249 : | parse-name { d: c-name } | ||
| 250 : | parse-function-types c-name string, | ||
| 251 : | anton | 1.5 | r@ cell+ |
| 252 : | s" xxx.c" w/o create-file throw ( file-id ) | ||
| 253 : | dup >r >outfile gen-wrapper-function outfile< | ||
| 254 : | r> close-file throw | ||
| 255 : | compile-wrapper-function | ||
| 256 : | link-wrapper-function | ||
| 257 : | r> ! | ||
| 258 : | anton | 1.2 | does> ( ... -- ... ) |
| 259 : | @ call-c ; | ||
| 260 : | |||
| 261 : | |||
| 262 : | |||
| 263 : | anton | 1.1 | |
| 264 : | |||
| 265 : | s" Library not found" exception constant err-nolib | ||
| 266 : | |||
| 267 : | : library ( "name" "file" -- ) \ gforth | ||
| 268 : | \G Dynamically links the library specified by @i{file}. Defines a | ||
| 269 : | \G word @i{name} ( -- lib ) that starts the declaration of a | ||
| 270 : | \G function from that library. | ||
| 271 : | create parse-name open-lib dup 0= err-nolib and throw , | ||
| 272 : | does> ( -- lib ) | ||
| 273 : | @ ; | ||
| 274 : | |||
| 275 : | anton | 1.3 | \ test |
| 276 : | anton | 1.1 | |
| 277 : | anton | 1.5 | \ test all parameter and return types |
| 278 : | |||
| 279 : | \ cr .( #include "engine/libcc.h") | ||
| 280 : | \ cr .( #include <unistd.h>) | ||
| 281 : | \ cr ." typedef void (* func)(int); | ||
| 282 : | \ cr ." int test1(int,char*,long,double,void (*)(int));" | ||
| 283 : | \ cr ." Cell *test2(void);" | ||
| 284 : | \ cr ." int test3(void);" | ||
| 285 : | \ cr ." float test4(void);" | ||
| 286 : | \ cr ." func test5(void);" | ||
| 287 : | \ cr ." void test6(void);" | ||
| 288 : | \ cr | ||
| 289 : | |||
| 290 : | \ c-function dlseek lseek n d n -- d | ||
| 291 : | \ c-function n test1 n a d r func -- n | ||
| 292 : | \ c-function a test2 -- a | ||
| 293 : | \ c-function d test3 -- d | ||
| 294 : | \ c-function r test4 -- r | ||
| 295 : | \ c-function func test5 -- func | ||
| 296 : | \ c-function void test6 -- void | ||
| 297 : | |||
| 298 : | c-function strlen strlen a -- n | ||
| 299 : | |||
| 300 : | cr s\" fooo\0" 2dup dump drop .s strlen cr .s cr |
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