[gforth] / gforth / Attic / main.c  

gforth: gforth/Attic/main.c

1 : anton 1.30 /* command line interpretation, image loading etc. for Gforth
2 :    
3 :    
4 :     Copyright (C) 1995 Free Software Foundation, Inc.
5 :    
6 :     This file is part of Gforth.
7 :    
8 :     Gforth is free software; you can redistribute it and/or
9 :     modify it under the terms of the GNU General Public License
10 :     as published by the Free Software Foundation; either version 2
11 :     of the License, or (at your option) any later version.
12 :    
13 :     This program is distributed in the hope that it will be useful,
14 :     but WITHOUT ANY WARRANTY; without even the implied warranty of
15 :     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 :     GNU General Public License for more details.
17 :    
18 :     You should have received a copy of the GNU General Public License
19 :     along with this program; if not, write to the Free Software
20 :     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 : anton 1.1 */
22 :    
23 : anton 1.32 #include "config.h"
24 : anton 1.35 #include <errno.h>
25 : anton 1.1 #include <ctype.h>
26 :     #include <stdio.h>
27 :     #include <string.h>
28 :     #include <math.h>
29 :     #include <sys/types.h>
30 :     #include <sys/stat.h>
31 :     #include <fcntl.h>
32 :     #include <assert.h>
33 :     #include <stdlib.h>
34 : anton 1.49 #if HAVE_SYS_MMAN_H
35 :     #include <sys/mman.h>
36 :     #endif
37 : anton 1.1 #include "forth.h"
38 : pazsan 1.5 #include "io.h"
39 : anton 1.20 #include "getopt.h"
40 : anton 1.45 #include "version.h"
41 : pazsan 1.2
42 : anton 1.52 #define PRIM_VERSION 1
43 :     /* increment this whenever the primitives change in an incompatible way */
44 :    
45 : pazsan 1.22 #ifdef MSDOS
46 :     jmp_buf throw_jmp_buf;
47 : pazsan 1.58 # ifndef DEFAULTPATH
48 :     # define DEFAULTPATH "."
49 :     # endif
50 : pazsan 1.22 #endif
51 :    
52 : anton 1.54 #if defined(DIRECT_THREADED)
53 : pazsan 1.16 # define CA(n) (symbols[(n)])
54 : anton 1.1 #else
55 : pazsan 1.21 # define CA(n) ((Cell)(symbols+(n)))
56 : anton 1.1 #endif
57 :    
58 : pazsan 1.23 #define maxaligned(n) (typeof(n))((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
59 : anton 1.10
60 : anton 1.50 static UCell dictsize=0;
61 :     static UCell dsize=0;
62 :     static UCell rsize=0;
63 :     static UCell fsize=0;
64 :     static UCell lsize=0;
65 : anton 1.54 int offset_image=0;
66 : anton 1.49 static int clear_dictionary=0;
67 :     static int debug=0;
68 :     static size_t pagesize=0;
69 : anton 1.10 char *progname;
70 :    
71 : anton 1.1 /* image file format:
72 : pazsan 1.58 * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.3.0 -i\n")
73 : anton 1.35 * padding to a multiple of 8
74 : anton 1.36 * magic: "Gforth1x" means format 0.2,
75 : anton 1.35 * where x is even for big endian and odd for little endian
76 :     * and x & ~1 is the size of the cell in bytes.
77 :     * padding to max alignment (no padding necessary on current machines)
78 :     * ImageHeader structure (see below)
79 :     * data (size in ImageHeader.image_size)
80 :     * tags ((if relocatable, 1 bit/data cell)
81 : anton 1.1 *
82 : anton 1.35 * tag==1 means that the corresponding word is an address;
83 : anton 1.1 * If the word is >=0, the address is within the image;
84 :     * addresses within the image are given relative to the start of the image.
85 : anton 1.35 * If the word =-1 (CF_NIL), the address is NIL,
86 :     * If the word is <CF_NIL and >CF(DODOES), it's a CFA (:, Create, ...)
87 :     * If the word =CF(DODOES), it's a DOES> CFA
88 :     * If the word =CF(DOESJUMP), it's a DOES JUMP (2 Cells after DOES>,
89 :     * possibly containing a jump to dodoes)
90 :     * If the word is <CF(DOESJUMP), it's a primitive
91 : anton 1.1 */
92 :    
93 : anton 1.35 typedef struct {
94 :     Address base; /* base address of image (0 if relocatable) */
95 :     UCell checksum; /* checksum of ca's to protect against some
96 :     incompatible binary/executable combinations
97 :     (0 if relocatable) */
98 :     UCell image_size; /* all sizes in bytes */
99 :     UCell dict_size;
100 :     UCell data_stack_size;
101 :     UCell fp_stack_size;
102 :     UCell return_stack_size;
103 :     UCell locals_stack_size;
104 :     Xt *boot_entry; /* initial ip for booting (in BOOT) */
105 :     Xt *throw_entry; /* ip after signal (in THROW) */
106 : anton 1.49 Cell unused1; /* possibly tib stack size */
107 :     Cell unused2;
108 :     Address data_stack_base; /* this and the following fields are initialized by the loader */
109 :     Address fp_stack_base;
110 :     Address return_stack_base;
111 :     Address locals_stack_base;
112 : anton 1.35 } ImageHeader;
113 :     /* the image-header is created in main.fs */
114 :    
115 : anton 1.10 void relocate(Cell *image, char *bitstring, int size, Label symbols[])
116 : anton 1.1 {
117 : pazsan 1.16 int i=0, j, k, steps=(size/sizeof(Cell))/8;
118 :     char bits;
119 : pazsan 1.5 /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
120 : pazsan 1.37
121 :     /* printf("relocating %x[%x]\n", image, size); */
122 : pazsan 1.5
123 : pazsan 1.16 for(k=0; k<=steps; k++)
124 : anton 1.55 for(j=0, bits=bitstring[k]; j<8; j++, i++, bits<<=1) {
125 :     /* fprintf(stderr,"relocate: image[%d]\n", i);*/
126 :     if(bits & 0x80) {
127 :     /* fprintf(stderr,"relocate: image[%d]=%d\n", i, image[i]);*/
128 : pazsan 1.16 if(image[i]<0)
129 :     switch(image[i])
130 :     {
131 :     case CF_NIL : image[i]=0; break;
132 : anton 1.54 #if !defined(DOUBLY_INDIRECT)
133 : pazsan 1.16 case CF(DOCOL) :
134 :     case CF(DOVAR) :
135 :     case CF(DOCON) :
136 :     case CF(DOUSER) :
137 : pazsan 1.24 case CF(DODEFER) :
138 : anton 1.28 case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(image[i])]); break;
139 : anton 1.54 case CF(DOESJUMP): MAKE_DOES_HANDLER(image+i); break;
140 :     #endif /* !defined(DOUBLY_INDIRECT) */
141 :     case CF(DODOES) :
142 :     MAKE_DOES_CF(image+i,image[i+1]+((Cell)image));
143 : pazsan 1.16 break;
144 : pazsan 1.37 default :
145 :     /* printf("Code field generation image[%x]:=CA(%x)\n",
146 : anton 1.54 i, CF(image[i])); */
147 :     image[i]=(Cell)CA(CF(image[i]));
148 : pazsan 1.16 }
149 :     else
150 :     image[i]+=(Cell)image;
151 : anton 1.55 }
152 :     }
153 : anton 1.1 }
154 :    
155 : anton 1.35 UCell checksum(Label symbols[])
156 :     {
157 : anton 1.52 UCell r=PRIM_VERSION;
158 : anton 1.35 Cell i;
159 :    
160 :     for (i=DOCOL; i<=DOESJUMP; i++) {
161 :     r ^= (UCell)(symbols[i]);
162 :     r = (r << 5) | (r >> (8*sizeof(Cell)-5));
163 :     }
164 :     #ifdef DIRECT_THREADED
165 :     /* we have to consider all the primitives */
166 :     for (; symbols[i]!=(Label)0; i++) {
167 :     r ^= (UCell)(symbols[i]);
168 :     r = (r << 5) | (r >> (8*sizeof(Cell)-5));
169 :     }
170 :     #else
171 :     /* in indirect threaded code all primitives are accessed through the
172 :     symbols table, so we just have to put the base address of symbols
173 :     in the checksum */
174 :     r ^= (UCell)symbols;
175 :     #endif
176 :     return r;
177 :     }
178 :    
179 : anton 1.49 Address my_alloc(Cell size)
180 :     {
181 :     static Address next_address=0;
182 :     Address r;
183 :    
184 : anton 1.56 /* the 256MB jump restriction on the MIPS architecture makes the
185 :     combination of direct threading and mmap unsafe. */
186 :     #if HAVE_MMAP && (!defined(mips) || defined(INDIRECT_THREADED))
187 : anton 1.54 #if defined(MAP_ANON)
188 : anton 1.49 if (debug)
189 : anton 1.54 fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
190 : anton 1.49 r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
191 : anton 1.54 #else /* !defined(MAP_ANON) */
192 : anton 1.55 /* Ultrix (at least does not define MAP_FILE and MAP_PRIVATE (both are
193 :     apparently defaults*/
194 :     #ifndef MAP_FILE
195 :     # define MAP_FILE 0
196 :     #endif
197 :     #ifndef MAP_PRIVATE
198 :     # define MAP_PRIVATE 0
199 :     #endif
200 : anton 1.54 static int dev_zero=-1;
201 :    
202 :     if (dev_zero == -1)
203 :     dev_zero = open("/dev/zero", O_RDONLY);
204 :     if (dev_zero == -1) {
205 :     r = (Address)-1;
206 :     if (debug)
207 :     fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
208 :     strerror(errno));
209 :     } else {
210 :     if (debug)
211 :     fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
212 :     r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
213 :     }
214 :     #endif /* !defined(MAP_ANON) */
215 :    
216 : anton 1.49 if (r != (Address)-1) {
217 :     if (debug)
218 :     fprintf(stderr, "success, address=$%lx\n", (long) r);
219 :     if (pagesize != 0)
220 :     next_address = (Address)(((((Cell)r)+size-1)&-pagesize)+2*pagesize); /* leave one page unmapped */
221 :     return r;
222 :     }
223 :     if (debug)
224 :     fprintf(stderr, "failed: %s\n", strerror(errno));
225 : anton 1.54 #endif /* HAVE_MMAP */
226 : anton 1.49 /* use malloc as fallback, leave a little room (64B) for stack underflows */
227 :     if ((r = malloc(size+64))==NULL) {
228 :     perror(progname);
229 :     exit(1);
230 :     }
231 : pazsan 1.53 r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
232 : anton 1.49 if (debug)
233 :     fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
234 :     return r;
235 :     }
236 :    
237 : pazsan 1.39 Address loader(FILE *imagefile, char* filename)
238 : anton 1.35 /* returns the address of the image proper (after the preamble) */
239 : anton 1.10 {
240 : anton 1.35 ImageHeader header;
241 :     Address image;
242 :     Address imp; /* image+preamble */
243 : pazsan 1.53 Char magic[9];
244 : anton 1.35 Cell preamblesize=0;
245 : anton 1.54 Label *symbols = engine(0,0,0,0,0);
246 :     Cell data_offset = offset_image ? 28*sizeof(Cell) : 0;
247 :     UCell check_sum;
248 :     static char* endianstring[]= { "big","little" };
249 : pazsan 1.18
250 : anton 1.54 #ifndef DOUBLY_INDIRECT
251 :     check_sum = checksum(symbols);
252 :     #else /* defined(DOUBLY_INDIRECT) */
253 :     check_sum = (UCell)symbols;
254 :     #endif /* defined(DOUBLY_INDIRECT) */
255 : pazsan 1.25
256 : pazsan 1.18 do
257 :     {
258 :     if(fread(magic,sizeof(Char),8,imagefile) < 8) {
259 : pazsan 1.39 fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.2) image.\n",
260 :     progname, filename);
261 : pazsan 1.18 exit(1);
262 :     }
263 : anton 1.35 preamblesize+=8;
264 : pazsan 1.18 }
265 : anton 1.35 while(memcmp(magic,"Gforth1",7));
266 : pazsan 1.53 if (debug) {
267 :     magic[8]='\0';
268 :     fprintf(stderr,"Magic found: %s\n", magic);
269 :     }
270 :    
271 : anton 1.35 if(magic[7] != sizeof(Cell) +
272 : pazsan 1.25 #ifdef WORDS_BIGENDIAN
273 :     '0'
274 :     #else
275 :     '1'
276 :     #endif
277 : anton 1.35 )
278 :     { fprintf(stderr,"This image is %d bit %s-endian, whereas the machine is %d bit %s-endian.\n",
279 :     ((magic[7]-'0')&~1)*8, endianstring[magic[7]&1],
280 :     sizeof(Cell)*8, endianstring[
281 : pazsan 1.25 #ifdef WORDS_BIGENDIAN
282 :     0
283 :     #else
284 :     1
285 :     #endif
286 :     ]);
287 :     exit(-2);
288 :     };
289 : pazsan 1.18
290 : anton 1.35 fread((void *)&header,sizeof(ImageHeader),1,imagefile);
291 : pazsan 1.16 if (dictsize==0)
292 : anton 1.35 dictsize = header.dict_size;
293 : pazsan 1.16 if (dsize==0)
294 : anton 1.35 dsize=header.data_stack_size;
295 : pazsan 1.16 if (rsize==0)
296 : anton 1.35 rsize=header.return_stack_size;
297 : pazsan 1.16 if (fsize==0)
298 : anton 1.35 fsize=header.fp_stack_size;
299 : pazsan 1.16 if (lsize==0)
300 : anton 1.35 lsize=header.locals_stack_size;
301 : pazsan 1.16 dictsize=maxaligned(dictsize);
302 :     dsize=maxaligned(dsize);
303 :     rsize=maxaligned(rsize);
304 :     lsize=maxaligned(lsize);
305 :     fsize=maxaligned(fsize);
306 :    
307 : anton 1.49 #if HAVE_GETPAGESIZE
308 :     pagesize=getpagesize(); /* Linux/GNU libc offers this */
309 :     #elif HAVE_SYSCONF && defined(_SC_PAGESIZE)
310 :     pagesize=sysconf(_SC_PAGESIZE); /* POSIX.4 */
311 :     #elif PAGESIZE
312 : anton 1.54 pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
313 : anton 1.49 #endif
314 :     if (debug)
315 :     fprintf(stderr,"pagesize=%d\n",pagesize);
316 :    
317 : anton 1.54 image = my_alloc(preamblesize+dictsize+data_offset)+data_offset;
318 : anton 1.35 rewind(imagefile); /* fseek(imagefile,0L,SEEK_SET); */
319 : anton 1.49 if (clear_dictionary)
320 :     memset(image,0,dictsize);
321 :     fread(image,1,preamblesize+header.image_size,imagefile);
322 : anton 1.35 imp=image+preamblesize;
323 :     if(header.base==0) {
324 : anton 1.49 Cell reloc_size=((header.image_size-1)/sizeof(Cell))/8+1;
325 :     char reloc_bits[reloc_size];
326 :     fread(reloc_bits,1,reloc_size,imagefile);
327 :     relocate((Cell *)imp,reloc_bits,header.image_size,symbols);
328 : anton 1.48 #if 0
329 :     { /* let's see what the relocator did */
330 :     FILE *snapshot=fopen("snapshot.fi","wb");
331 :     fwrite(image,1,imagesize,snapshot);
332 :     fclose(snapshot);
333 :     }
334 :     #endif
335 : pazsan 1.16 }
336 : anton 1.35 else if(header.base!=imp) {
337 : anton 1.51 fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
338 : anton 1.35 progname, (unsigned long)header.base, (unsigned long)imp);
339 :     exit(1);
340 : anton 1.48 }
341 :     if (header.checksum==0)
342 :     ((ImageHeader *)imp)->checksum=check_sum;
343 :     else if (header.checksum != check_sum) {
344 : anton 1.57 fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
345 : anton 1.35 progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
346 : pazsan 1.16 exit(1);
347 :     }
348 : anton 1.49 fclose(imagefile);
349 : anton 1.1
350 : anton 1.35 ((ImageHeader *)imp)->dict_size=dictsize;
351 :     ((ImageHeader *)imp)->data_stack_size=dsize;
352 : anton 1.49 ((ImageHeader *)imp)->fp_stack_size=fsize;
353 : anton 1.35 ((ImageHeader *)imp)->return_stack_size=rsize;
354 :     ((ImageHeader *)imp)->locals_stack_size=lsize;
355 :    
356 : anton 1.49 ((ImageHeader *)imp)->data_stack_base=my_alloc(dsize);
357 :     ((ImageHeader *)imp)->fp_stack_base=my_alloc(fsize);
358 :     ((ImageHeader *)imp)->return_stack_base=my_alloc(rsize);
359 :     ((ImageHeader *)imp)->locals_stack_base=my_alloc(lsize);
360 :    
361 : anton 1.38 CACHE_FLUSH(imp, header.image_size);
362 : anton 1.35
363 :     return imp;
364 : anton 1.1 }
365 :    
366 : anton 1.35 int go_forth(Address image, int stack, Cell *entries)
367 : anton 1.1 {
368 : anton 1.49 Cell *sp=(Cell*)(((ImageHeader *)image)->data_stack_base + dsize);
369 :     Float *fp=(Float *)(((ImageHeader *)image)->fp_stack_base + fsize);
370 :     Cell *rp=(Cell *)(((ImageHeader *)image)->return_stack_base + rsize);
371 :     Address lp=((ImageHeader *)image)->locals_stack_base + lsize;
372 : anton 1.35 Xt *ip=(Xt *)(((ImageHeader *)image)->boot_entry);
373 : anton 1.15 int throw_code;
374 : anton 1.49
375 :     /* ensure that the cached elements (if any) are accessible */
376 :     IF_TOS(sp--);
377 :     IF_FTOS(fp--);
378 : anton 1.15
379 :     for(;stack>0;stack--)
380 :     *--sp=entries[stack-1];
381 : pazsan 1.39
382 : pazsan 1.44 #if !defined(MSDOS) && !defined(_WIN32) && !defined(__EMX__)
383 : anton 1.33 get_winsize();
384 : pazsan 1.39 #endif
385 :    
386 : anton 1.15 install_signal_handlers(); /* right place? */
387 :    
388 :     if ((throw_code=setjmp(throw_jmp_buf))) {
389 :     static Cell signal_data_stack[8];
390 :     static Cell signal_return_stack[8];
391 :     static Float signal_fp_stack[1];
392 :    
393 :     signal_data_stack[7]=throw_code;
394 :    
395 : anton 1.35 return((int)engine(((ImageHeader *)image)->throw_entry,signal_data_stack+7,
396 : anton 1.15 signal_return_stack+8,signal_fp_stack,0));
397 :     }
398 : anton 1.35
399 : anton 1.15 return((int)engine(ip,sp,rp,fp,lp));
400 : anton 1.1 }
401 :    
402 : anton 1.50 UCell convsize(char *s, UCell elemsize)
403 : anton 1.54 /* converts s of the format [0-9]+[bekM]? (e.g. 25k) into the number
404 :     of bytes. the letter at the end indicates the unit, where e stands
405 :     for the element size. default is e */
406 : anton 1.10 {
407 :     char *endp;
408 : anton 1.50 UCell n,m;
409 : anton 1.10
410 :     m = elemsize;
411 :     n = strtoul(s,&endp,0);
412 :     if (endp!=NULL) {
413 :     if (strcmp(endp,"b")==0)
414 :     m=1;
415 :     else if (strcmp(endp,"k")==0)
416 :     m=1024;
417 :     else if (strcmp(endp,"M")==0)
418 :     m=1024*1024;
419 : anton 1.31 else if (strcmp(endp,"e")!=0 && strcmp(endp,"")!=0) {
420 :     fprintf(stderr,"%s: cannot grok size specification %s: invalid unit \"%s\"\n", progname, s, endp);
421 : anton 1.10 exit(1);
422 :     }
423 :     }
424 :     return n*m;
425 :     }
426 :    
427 : anton 1.1 int main(int argc, char **argv, char **env)
428 :     {
429 : anton 1.43 char *path, *path1;
430 : pazsan 1.16 char *imagename="gforth.fi";
431 :     FILE *image_file;
432 :     int c, retvalue;
433 : anton 1.10
434 : anton 1.14 #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
435 : anton 1.30 /* turn on alignment checks on the 486.
436 :     * on the 386 this should have no effect. */
437 :     __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
438 :     /* this is unusable with Linux' libc.4.6.27, because this library is
439 :     not alignment-clean; we would have to replace some library
440 :     functions (e.g., memcpy) to make it work */
441 : anton 1.6 #endif
442 : pazsan 1.2
443 : pazsan 1.16 progname = argv[0];
444 : pazsan 1.44 if ((path1=getenv("GFORTHPATH"))==NULL)
445 :     path1 = DEFAULTPATH;
446 :    
447 : pazsan 1.16 opterr=0;
448 :     while (1) {
449 :     int option_index=0;
450 :     static struct option opts[] = {
451 :     {"image-file", required_argument, NULL, 'i'},
452 :     {"dictionary-size", required_argument, NULL, 'm'},
453 :     {"data-stack-size", required_argument, NULL, 'd'},
454 :     {"return-stack-size", required_argument, NULL, 'r'},
455 :     {"fp-stack-size", required_argument, NULL, 'f'},
456 :     {"locals-stack-size", required_argument, NULL, 'l'},
457 :     {"path", required_argument, NULL, 'p'},
458 : anton 1.45 {"version", no_argument, NULL, 'v'},
459 :     {"help", no_argument, NULL, 'h'},
460 : anton 1.54 /* put something != 0 into offset_image */
461 :     {"offset-image", no_argument, &offset_image, 1},
462 : anton 1.55 {"no-offset-im", no_argument, &offset_image, 0},
463 : anton 1.54 {"clear-dictionary", no_argument, &clear_dictionary, 1},
464 : anton 1.49 {"debug", no_argument, &debug, 1},
465 : pazsan 1.16 {0,0,0,0}
466 :     /* no-init-file, no-rc? */
467 :     };
468 : pazsan 1.44
469 : anton 1.54 c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vh", opts, &option_index);
470 : pazsan 1.44
471 : pazsan 1.16 if (c==EOF)
472 :     break;
473 :     if (c=='?') {
474 :     optind--;
475 :     break;
476 :     }
477 :     switch (c) {
478 :     case 'i': imagename = optarg; break;
479 :     case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
480 :     case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
481 :     case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
482 :     case 'f': fsize = convsize(optarg,sizeof(Float)); break;
483 :     case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
484 : pazsan 1.44 case 'p': path1 = optarg; break;
485 : anton 1.45 case 'v': fprintf(stderr, "gforth %s\n", gforth_version); exit(0);
486 :     case 'h':
487 :     fprintf(stderr, "Usage: %s [engine options] [image arguments]\n\
488 :     Engine Options:\n\
489 : pazsan 1.53 -c, --clear-dictionary Initialize the dictionary with 0 bytes\n\
490 : anton 1.45 -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
491 : anton 1.49 --debug Print debugging information during startup\n\
492 : anton 1.45 -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
493 :     -h, --help Print this message and exit\n\
494 :     -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
495 :     -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
496 :     -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
497 : anton 1.49 --offset-image Load image at a different position\n\
498 : anton 1.45 -p PATH, --path=PATH Search path for finding image and sources\n\
499 :     -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
500 :     -v, --version Print version and exit\n\
501 : anton 1.54 SIZE arguments consist of an integer followed by a unit. The unit can be\n\
502 : anton 1.45 `b' (bytes), `e' (elements), `k' (kilobytes), or `M' (Megabytes).\n\
503 :     \n\
504 :     Arguments of default image `gforth.fi':\n\
505 :     FILE load FILE (with `require')\n\
506 :     -e STRING, --evaluate STRING interpret STRING (with `EVALUATE')\n",
507 :     argv[0]); exit(0);
508 : pazsan 1.16 }
509 :     }
510 : pazsan 1.44 path=path1;
511 :    
512 : pazsan 1.29 if(strchr(imagename, '/')==NULL)
513 :     {
514 :     do {
515 : anton 1.43 char *pend=strchr(path, PATHSEP);
516 : pazsan 1.29 if (pend==NULL)
517 :     pend=path+strlen(path);
518 :     if (strlen(path)==0) {
519 :     fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
520 : anton 1.47 progname, imagename, path1);
521 : pazsan 1.29 exit(1);
522 :     }
523 :     {
524 :     int dirlen=pend-path;
525 :     char fullfilename[dirlen+strlen(imagename)+2];
526 :     memcpy(fullfilename, path, dirlen);
527 :     if (fullfilename[dirlen-1]!='/')
528 :     fullfilename[dirlen++]='/';
529 :     strcpy(fullfilename+dirlen,imagename);
530 :     image_file=fopen(fullfilename,"rb");
531 : anton 1.54 if (image_file!=NULL && debug)
532 :     fprintf(stderr, "Opened image file: %s\n", fullfilename);
533 : pazsan 1.29 }
534 : anton 1.43 path=pend+(*pend==PATHSEP);
535 : pazsan 1.29 } while (image_file==NULL);
536 : pazsan 1.16 }
537 : pazsan 1.29 else
538 : pazsan 1.16 {
539 : pazsan 1.29 image_file=fopen(imagename,"rb");
540 : pazsan 1.16 }
541 : pazsan 1.29
542 : pazsan 1.16 {
543 : anton 1.45 char path2[strlen(path1)+1];
544 : anton 1.43 char *p1, *p2;
545 : pazsan 1.16 Cell environ[]= {
546 :     (Cell)argc-(optind-1),
547 :     (Cell)(argv+(optind-1)),
548 : anton 1.42 (Cell)strlen(path1),
549 : anton 1.43 (Cell)path2};
550 : pazsan 1.16 argv[optind-1] = progname;
551 :     /*
552 :     for (i=0; i<environ[0]; i++)
553 :     printf("%s\n", ((char **)(environ[1]))[i]);
554 :     */
555 : anton 1.42 /* make path OS-independent by replacing path separators with NUL */
556 : anton 1.43 for (p1=path1, p2=path2; *p1!='\0'; p1++, p2++)
557 :     if (*p1==PATHSEP)
558 :     *p2 = '\0';
559 :     else
560 :     *p2 = *p1;
561 :     *p2='\0';
562 : anton 1.42 retvalue=go_forth(loader(image_file, imagename),4,environ);
563 : pazsan 1.16 deprep_terminal();
564 :     exit(retvalue);
565 :     }
566 : anton 1.1 }
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