Annotation of gforth/engine/main.c, revision 1.1
1.1 ! anton 1: /* 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: */
! 22:
! 23: #include "config.h"
! 24: #include <errno.h>
! 25: #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: #if HAVE_SYS_MMAN_H
! 35: #include <sys/mman.h>
! 36: #endif
! 37: #include "forth.h"
! 38: #include "io.h"
! 39: #include "getopt.h"
! 40: #include "version.h"
! 41:
! 42: #define PRIM_VERSION 1
! 43: /* increment this whenever the primitives change in an incompatible way */
! 44:
! 45: #ifdef MSDOS
! 46: jmp_buf throw_jmp_buf;
! 47: # ifndef DEFAULTPATH
! 48: # define DEFAULTPATH "."
! 49: # endif
! 50: #endif
! 51:
! 52: #if defined(DIRECT_THREADED)
! 53: # define CA(n) (symbols[(n)])
! 54: #else
! 55: # define CA(n) ((Cell)(symbols+(n)))
! 56: #endif
! 57:
! 58: #define maxaligned(n) (typeof(n))((((Cell)n)+sizeof(Float)-1)&-sizeof(Float))
! 59:
! 60: 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: int offset_image=0;
! 66: static int clear_dictionary=0;
! 67: static int debug=0;
! 68: static size_t pagesize=0;
! 69: char *progname;
! 70:
! 71: /* image file format:
! 72: * "#! binary-path -i\n" (e.g., "#! /usr/local/bin/gforth-0.3.0 -i\n")
! 73: * padding to a multiple of 8
! 74: * magic: "Gforth1x" means format 0.2,
! 75: * 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: *
! 82: * tag==1 means that the corresponding word is an address;
! 83: * 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: * 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: */
! 92:
! 93: 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: 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: } ImageHeader;
! 113: /* the image-header is created in main.fs */
! 114:
! 115: void relocate(Cell *image, char *bitstring, int size, Label symbols[])
! 116: {
! 117: int i=0, j, k, steps=(size/sizeof(Cell))/8;
! 118: char bits;
! 119: /* static char bits[8]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};*/
! 120:
! 121: /* printf("relocating %x[%x]\n", image, size); */
! 122:
! 123: for(k=0; k<=steps; k++)
! 124: 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: if(image[i]<0)
! 129: switch(image[i])
! 130: {
! 131: case CF_NIL : image[i]=0; break;
! 132: #if !defined(DOUBLY_INDIRECT)
! 133: case CF(DOCOL) :
! 134: case CF(DOVAR) :
! 135: case CF(DOCON) :
! 136: case CF(DOUSER) :
! 137: case CF(DODEFER) :
! 138: case CF(DOFIELD) : MAKE_CF(image+i,symbols[CF(image[i])]); break;
! 139: 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: break;
! 144: default :
! 145: /* printf("Code field generation image[%x]:=CA(%x)\n",
! 146: i, CF(image[i])); */
! 147: image[i]=(Cell)CA(CF(image[i]));
! 148: }
! 149: else
! 150: image[i]+=(Cell)image;
! 151: }
! 152: }
! 153: }
! 154:
! 155: UCell checksum(Label symbols[])
! 156: {
! 157: UCell r=PRIM_VERSION;
! 158: 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: Address my_alloc(Cell size)
! 180: {
! 181: static Address next_address=0;
! 182: Address r;
! 183:
! 184: /* 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: #if defined(MAP_ANON)
! 188: if (debug)
! 189: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_ANON, ...); ", (long)next_address, (long)size);
! 190: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
! 191: #else /* !defined(MAP_ANON) */
! 192: /* Ultrix (at least does not define MAP_FILE and MAP_PRIVATE (both are
! 193: apparently defaults*/
! 194: #ifndef MAP_FILE
! 195: # define MAP_FILE 0
! 196: #endif
! 197: #ifndef MAP_PRIVATE
! 198: # define MAP_PRIVATE 0
! 199: #endif
! 200: static int dev_zero=-1;
! 201:
! 202: if (dev_zero == -1)
! 203: dev_zero = open("/dev/zero", O_RDONLY);
! 204: if (dev_zero == -1) {
! 205: r = (Address)-1;
! 206: if (debug)
! 207: fprintf(stderr, "open(\"/dev/zero\"...) failed (%s), no mmap; ",
! 208: strerror(errno));
! 209: } else {
! 210: if (debug)
! 211: fprintf(stderr,"try mmap($%lx, $%lx, ..., MAP_FILE, dev_zero, ...); ", (long)next_address, (long)size);
! 212: r=mmap(next_address, size, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_FILE|MAP_PRIVATE, dev_zero, 0);
! 213: }
! 214: #endif /* !defined(MAP_ANON) */
! 215:
! 216: if (r != (Address)-1) {
! 217: if (debug)
! 218: fprintf(stderr, "success, address=$%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: #endif /* HAVE_MMAP */
! 226: /* 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: r = (Address)((((Cell)r)+(sizeof(Float)-1))&(-sizeof(Float)));
! 232: if (debug)
! 233: fprintf(stderr, "malloc succeeds, address=$%lx\n", (long)r);
! 234: return r;
! 235: }
! 236:
! 237: Address loader(FILE *imagefile, char* filename)
! 238: /* returns the address of the image proper (after the preamble) */
! 239: {
! 240: ImageHeader header;
! 241: Address image;
! 242: Address imp; /* image+preamble */
! 243: Char magic[9];
! 244: Cell preamblesize=0;
! 245: 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:
! 250: #ifndef DOUBLY_INDIRECT
! 251: check_sum = checksum(symbols);
! 252: #else /* defined(DOUBLY_INDIRECT) */
! 253: check_sum = (UCell)symbols;
! 254: #endif /* defined(DOUBLY_INDIRECT) */
! 255:
! 256: do
! 257: {
! 258: if(fread(magic,sizeof(Char),8,imagefile) < 8) {
! 259: fprintf(stderr,"%s: image %s doesn't seem to be a Gforth (>=0.2) image.\n",
! 260: progname, filename);
! 261: exit(1);
! 262: }
! 263: preamblesize+=8;
! 264: }
! 265: while(memcmp(magic,"Gforth1",7));
! 266: if (debug) {
! 267: magic[8]='\0';
! 268: fprintf(stderr,"Magic found: %s\n", magic);
! 269: }
! 270:
! 271: if(magic[7] != sizeof(Cell) +
! 272: #ifdef WORDS_BIGENDIAN
! 273: '0'
! 274: #else
! 275: '1'
! 276: #endif
! 277: )
! 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: #ifdef WORDS_BIGENDIAN
! 282: 0
! 283: #else
! 284: 1
! 285: #endif
! 286: ]);
! 287: exit(-2);
! 288: };
! 289:
! 290: fread((void *)&header,sizeof(ImageHeader),1,imagefile);
! 291: if (dictsize==0)
! 292: dictsize = header.dict_size;
! 293: if (dsize==0)
! 294: dsize=header.data_stack_size;
! 295: if (rsize==0)
! 296: rsize=header.return_stack_size;
! 297: if (fsize==0)
! 298: fsize=header.fp_stack_size;
! 299: if (lsize==0)
! 300: lsize=header.locals_stack_size;
! 301: dictsize=maxaligned(dictsize);
! 302: dsize=maxaligned(dsize);
! 303: rsize=maxaligned(rsize);
! 304: lsize=maxaligned(lsize);
! 305: fsize=maxaligned(fsize);
! 306:
! 307: #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: pagesize=PAGESIZE; /* in limits.h according to Gallmeister's POSIX.4 book */
! 313: #endif
! 314: if (debug)
! 315: fprintf(stderr,"pagesize=%d\n",pagesize);
! 316:
! 317: image = my_alloc(preamblesize+dictsize+data_offset)+data_offset;
! 318: rewind(imagefile); /* fseek(imagefile,0L,SEEK_SET); */
! 319: if (clear_dictionary)
! 320: memset(image,0,dictsize);
! 321: fread(image,1,preamblesize+header.image_size,imagefile);
! 322: imp=image+preamblesize;
! 323: if(header.base==0) {
! 324: 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: #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: }
! 336: else if(header.base!=imp) {
! 337: fprintf(stderr,"%s: Cannot load nonrelocatable image (compiled for address $%lx) at address $%lx\n",
! 338: progname, (unsigned long)header.base, (unsigned long)imp);
! 339: exit(1);
! 340: }
! 341: if (header.checksum==0)
! 342: ((ImageHeader *)imp)->checksum=check_sum;
! 343: else if (header.checksum != check_sum) {
! 344: fprintf(stderr,"%s: Checksum of image ($%lx) does not match the executable ($%lx)\n",
! 345: progname, (unsigned long)(header.checksum),(unsigned long)check_sum);
! 346: exit(1);
! 347: }
! 348: fclose(imagefile);
! 349:
! 350: ((ImageHeader *)imp)->dict_size=dictsize;
! 351: ((ImageHeader *)imp)->data_stack_size=dsize;
! 352: ((ImageHeader *)imp)->fp_stack_size=fsize;
! 353: ((ImageHeader *)imp)->return_stack_size=rsize;
! 354: ((ImageHeader *)imp)->locals_stack_size=lsize;
! 355:
! 356: ((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: CACHE_FLUSH(imp, header.image_size);
! 362:
! 363: return imp;
! 364: }
! 365:
! 366: int go_forth(Address image, int stack, Cell *entries)
! 367: {
! 368: 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: Xt *ip=(Xt *)(((ImageHeader *)image)->boot_entry);
! 373: int throw_code;
! 374:
! 375: /* ensure that the cached elements (if any) are accessible */
! 376: IF_TOS(sp--);
! 377: IF_FTOS(fp--);
! 378:
! 379: for(;stack>0;stack--)
! 380: *--sp=entries[stack-1];
! 381:
! 382: #if !defined(MSDOS) && !defined(_WIN32) && !defined(__EMX__)
! 383: get_winsize();
! 384: #endif
! 385:
! 386: 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: return((int)engine(((ImageHeader *)image)->throw_entry,signal_data_stack+7,
! 396: signal_return_stack+8,signal_fp_stack,0));
! 397: }
! 398:
! 399: return((int)engine(ip,sp,rp,fp,lp));
! 400: }
! 401:
! 402: UCell convsize(char *s, UCell elemsize)
! 403: /* 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: {
! 407: char *endp;
! 408: UCell n,m;
! 409:
! 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: 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: exit(1);
! 422: }
! 423: }
! 424: return n*m;
! 425: }
! 426:
! 427: int onlypath(char *file)
! 428: { int i;
! 429: i=strlen(file);
! 430: while (i) { if (file[i]=='\\' || file[i]=='/') break;
! 431: i--; }
! 432: return (i);
! 433: }
! 434:
! 435: FILE *openimage(char *fullfilename)
! 436: { FILE *image_file;
! 437: image_file=fopen(fullfilename,"rb");
! 438: if (image_file!=NULL && debug)
! 439: fprintf(stderr, "Opened image file: %s\n", fullfilename);
! 440: return (image_file);
! 441: }
! 442:
! 443: FILE *checkimage(char *path, int len, char *imagename)
! 444: { int dirlen=len;
! 445: char fullfilename[dirlen+strlen(imagename)+2];
! 446: memcpy(fullfilename, path, dirlen);
! 447: if (fullfilename[dirlen-1]!='/')
! 448: fullfilename[dirlen++]='/';
! 449: strcpy(fullfilename+dirlen,imagename);
! 450: return (openimage(fullfilename));
! 451: }
! 452:
! 453: int main(int argc, char **argv, char **env)
! 454: {
! 455: char *path, *path1;
! 456: char *imagename="gforth.fi";
! 457: FILE *image_file;
! 458: int c, retvalue;
! 459:
! 460: #if defined(i386) && defined(ALIGNMENT_CHECK) && !defined(DIRECT_THREADED)
! 461: /* turn on alignment checks on the 486.
! 462: * on the 386 this should have no effect. */
! 463: __asm__("pushfl; popl %eax; orl $0x40000, %eax; pushl %eax; popfl;");
! 464: /* this is unusable with Linux' libc.4.6.27, because this library is
! 465: not alignment-clean; we would have to replace some library
! 466: functions (e.g., memcpy) to make it work */
! 467: #endif
! 468:
! 469: progname = argv[0];
! 470: if ((path1=getenv("GFORTHPATH"))==NULL)
! 471: path1 = DEFAULTPATH;
! 472:
! 473: opterr=0;
! 474: while (1) {
! 475: int option_index=0;
! 476: static struct option opts[] = {
! 477: {"image-file", required_argument, NULL, 'i'},
! 478: {"dictionary-size", required_argument, NULL, 'm'},
! 479: {"data-stack-size", required_argument, NULL, 'd'},
! 480: {"return-stack-size", required_argument, NULL, 'r'},
! 481: {"fp-stack-size", required_argument, NULL, 'f'},
! 482: {"locals-stack-size", required_argument, NULL, 'l'},
! 483: {"path", required_argument, NULL, 'p'},
! 484: {"version", no_argument, NULL, 'v'},
! 485: {"help", no_argument, NULL, 'h'},
! 486: /* put something != 0 into offset_image */
! 487: {"offset-image", no_argument, &offset_image, 1},
! 488: {"no-offset-im", no_argument, &offset_image, 0},
! 489: {"clear-dictionary", no_argument, &clear_dictionary, 1},
! 490: {"debug", no_argument, &debug, 1},
! 491: {0,0,0,0}
! 492: /* no-init-file, no-rc? */
! 493: };
! 494:
! 495: c = getopt_long(argc, argv, "+i:m:d:r:f:l:p:vh", opts, &option_index);
! 496:
! 497: if (c==EOF)
! 498: break;
! 499: if (c=='?') {
! 500: optind--;
! 501: break;
! 502: }
! 503: switch (c) {
! 504: case 'i': imagename = optarg; break;
! 505: case 'm': dictsize = convsize(optarg,sizeof(Cell)); break;
! 506: case 'd': dsize = convsize(optarg,sizeof(Cell)); break;
! 507: case 'r': rsize = convsize(optarg,sizeof(Cell)); break;
! 508: case 'f': fsize = convsize(optarg,sizeof(Float)); break;
! 509: case 'l': lsize = convsize(optarg,sizeof(Cell)); break;
! 510: case 'p': path1 = optarg; break;
! 511: case 'v': fprintf(stderr, "gforth %s\n", gforth_version); exit(0);
! 512: case 'h':
! 513: fprintf(stderr, "Usage: %s [engine options] [image arguments]\n\
! 514: Engine Options:\n\
! 515: -c, --clear-dictionary Initialize the dictionary with 0 bytes\n\
! 516: -d SIZE, --data-stack-size=SIZE Specify data stack size\n\
! 517: --debug Print debugging information during startup\n\
! 518: -f SIZE, --fp-stack-size=SIZE Specify floating point stack size\n\
! 519: -h, --help Print this message and exit\n\
! 520: -i FILE, --image-file=FILE Use image FILE instead of `gforth.fi'\n\
! 521: -l SIZE, --locals-stack-size=SIZE Specify locals stack size\n\
! 522: -m SIZE, --dictionary-size=SIZE Specify Forth dictionary size\n\
! 523: --offset-image Load image at a different position\n\
! 524: -p PATH, --path=PATH Search path for finding image and sources\n\
! 525: -r SIZE, --return-stack-size=SIZE Specify return stack size\n\
! 526: -v, --version Print version and exit\n\
! 527: SIZE arguments consist of an integer followed by a unit. The unit can be\n\
! 528: `b' (bytes), `e' (elements), `k' (kilobytes), or `M' (Megabytes).\n\
! 529: \n\
! 530: Arguments of default image `gforth.fi':\n\
! 531: FILE load FILE (with `require')\n\
! 532: -e STRING, --evaluate STRING interpret STRING (with `EVALUATE')\n",
! 533: argv[0]); exit(0);
! 534: }
! 535: }
! 536: path=path1;
! 537: image_file=NULL;
! 538:
! 539: if(strchr(imagename, '/')==NULL)
! 540: {
! 541: /* first check the directory where the exe file is in !! 01may97jaw */
! 542: if (onlypath(progname))
! 543: image_file=checkimage(progname, onlypath(progname), imagename);
! 544: if (!image_file)
! 545: do {
! 546: char *pend=strchr(path, PATHSEP);
! 547: if (pend==NULL)
! 548: pend=path+strlen(path);
! 549: if (strlen(path)==0) break;
! 550: image_file=checkimage(path, pend-path, imagename);
! 551: path=pend+(*pend==PATHSEP);
! 552: } while (image_file==NULL);
! 553: }
! 554: else
! 555: { image_file=openimage(imagename);
! 556: }
! 557:
! 558: if (!image_file)
! 559: { fprintf(stderr,"%s: cannot open image file %s in path %s for reading\n",
! 560: progname, imagename, path1);
! 561: exit(1);
! 562: }
! 563:
! 564: {
! 565: char path2[strlen(path1)+1];
! 566: char *p1, *p2;
! 567: Cell environ[]= {
! 568: (Cell)argc-(optind-1),
! 569: (Cell)(argv+(optind-1)),
! 570: (Cell)strlen(path1),
! 571: (Cell)path2};
! 572: argv[optind-1] = progname;
! 573: /*
! 574: for (i=0; i<environ[0]; i++)
! 575: printf("%s\n", ((char **)(environ[1]))[i]);
! 576: */
! 577: /* make path OS-independent by replacing path separators with NUL */
! 578: for (p1=path1, p2=path2; *p1!='\0'; p1++, p2++)
! 579: if (*p1==PATHSEP)
! 580: *p2 = '\0';
! 581: else
! 582: *p2 = *p1;
! 583: *p2='\0';
! 584: retvalue=go_forth(loader(image_file, imagename),4,environ);
! 585: deprep_terminal();
! 586: exit(retvalue);
! 587: }
! 588: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to main.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [gforth] / gforth / engine