Annotation of gforth/engine/engine.c, revision 1.36

1.1       anton       1: /* Gforth virtual machine (aka inner interpreter)
                      2: 
1.22      anton       3:   Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
1.1       anton       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
1.23      anton      19:   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.1       anton      20: */
                     21: 
1.36    ! pazsan     22: undefine(`symbols')
        !            23: 
1.1       anton      24: #include "config.h"
1.31      pazsan     25: #include "forth.h"
1.1       anton      26: #include <ctype.h>
                     27: #include <stdio.h>
                     28: #include <string.h>
                     29: #include <math.h>
1.4       pazsan     30: #include <assert.h>
                     31: #include <stdlib.h>
                     32: #include <errno.h>
                     33: #include "io.h"
                     34: #include "threaded.h"
                     35: #ifndef STANDALONE
1.1       anton      36: #include <sys/types.h>
                     37: #include <sys/stat.h>
                     38: #include <fcntl.h>
                     39: #include <time.h>
                     40: #include <sys/time.h>
                     41: #include <unistd.h>
                     42: #include <pwd.h>
1.17      pazsan     43: #include <dirent.h>
1.21      anton      44: #include <sys/resource.h>
1.19      anton      45: #ifdef HAVE_FNMATCH_H
1.18      anton      46: #include <fnmatch.h>
1.19      anton      47: #else
                     48: #include "fnmatch.h"
                     49: #endif
1.4       pazsan     50: #else
                     51: #include "systypes.h"
                     52: #endif
1.1       anton      53: 
                     54: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN) /* what else? */
                     55: #include <dlfcn.h>
                     56: #endif
1.8       pazsan     57: #if defined(_WIN32)
                     58: #include <windows.h>
                     59: #endif
1.1       anton      60: #ifdef hpux
                     61: #include <dl.h>
                     62: #endif
                     63: 
                     64: #ifndef SEEK_SET
                     65: /* should be defined in stdio.h, but some systems don't have it */
                     66: #define SEEK_SET 0
                     67: #endif
                     68: 
                     69: #define IOR(flag)      ((flag)? -512-errno : 0)
                     70: 
1.4       pazsan     71: struct F83Name {
                     72:   struct F83Name *next;  /* the link field for old hands */
                     73:   char         countetc;
                     74:   char         name[0];
                     75: };
1.1       anton      76: 
                     77: #define F83NAME_COUNT(np)      ((np)->countetc & 0x1f)
1.25      anton      78: 
                     79: struct Longname {
                     80:   struct Longname *next;  /* the link field for old hands */
                     81:   Cell         countetc;
                     82:   char         name[0];
                     83: };
                     84: 
                     85: #define LONGNAME_COUNT(np)     ((np)->countetc & (((~((UCell)0))<<3)>>3))
1.1       anton      86: 
                     87: Cell *SP;
                     88: Float *FP;
                     89: Address UP=NULL;
                     90: 
                     91: #if 0
                     92: /* not used currently */
                     93: int emitcounter;
                     94: #endif
                     95: #define NULLC '\0'
                     96: 
1.14      pazsan     97: #ifdef MEMCMP_AS_SUBROUTINE
                     98: extern int gforth_memcmp(const char * s1, const char * s2, size_t n);
1.15      anton      99: #define memcmp(s1,s2,n) gforth_memcmp(s1,s2,n)
1.14      pazsan    100: #endif
                    101: 
1.9       pazsan    102: #ifdef HAS_FILE
1.1       anton     103: char *cstr(Char *from, UCell size, int clear)
                    104: /* return a C-string corresponding to the Forth string ( FROM SIZE ).
                    105:    the C-string lives until the next call of cstr with CLEAR being true */
                    106: {
                    107:   static struct cstr_buffer {
                    108:     char *buffer;
                    109:     size_t size;
                    110:   } *buffers=NULL;
                    111:   static int nbuffers=0;
                    112:   static int used=0;
                    113:   struct cstr_buffer *b;
                    114: 
                    115:   if (buffers==NULL)
                    116:     buffers=malloc(0);
                    117:   if (clear)
                    118:     used=0;
                    119:   if (used>=nbuffers) {
                    120:     buffers=realloc(buffers,sizeof(struct cstr_buffer)*(used+1));
                    121:     buffers[used]=(struct cstr_buffer){malloc(0),0};
                    122:     nbuffers=used+1;
                    123:   }
                    124:   b=&buffers[used];
                    125:   if (size+1 > b->size) {
                    126:     b->buffer = realloc(b->buffer,size+1);
                    127:     b->size = size+1;
                    128:   }
                    129:   memcpy(b->buffer,from,size);
                    130:   b->buffer[size]='\0';
                    131:   used++;
                    132:   return b->buffer;
                    133: }
                    134: 
                    135: char *tilde_cstr(Char *from, UCell size, int clear)
                    136: /* like cstr(), but perform tilde expansion on the string */
                    137: {
                    138:   char *s1,*s2;
                    139:   int s1_len, s2_len;
                    140:   struct passwd *getpwnam (), *user_entry;
                    141: 
                    142:   if (size<1 || from[0]!='~')
                    143:     return cstr(from, size, clear);
                    144:   if (size<2 || from[1]=='/') {
                    145:     s1 = (char *)getenv ("HOME");
                    146:     if(s1 == NULL)
                    147:       s1 = "";
                    148:     s2 = from+1;
                    149:     s2_len = size-1;
                    150:   } else {
                    151:     UCell i;
                    152:     for (i=1; i<size && from[i]!='/'; i++)
                    153:       ;
1.13      anton     154:     if (i==2 && from[1]=='+') /* deal with "~+", i.e., the wd */
                    155:       return cstr(from+3, size<3?0:size-3,clear);
1.1       anton     156:     {
                    157:       char user[i];
                    158:       memcpy(user,from+1,i-1);
                    159:       user[i-1]='\0';
                    160:       user_entry=getpwnam(user);
                    161:     }
                    162:     if (user_entry==NULL)
                    163:       return cstr(from, size, clear);
                    164:     s1 = user_entry->pw_dir;
                    165:     s2 = from+i;
                    166:     s2_len = size-i;
                    167:   }
                    168:   s1_len = strlen(s1);
                    169:   if (s1_len>1 && s1[s1_len-1]=='/')
                    170:     s1_len--;
                    171:   {
                    172:     char path[s1_len+s2_len];
                    173:     memcpy(path,s1,s1_len);
                    174:     memcpy(path+s1_len,s2,s2_len);
                    175:     return cstr(path,s1_len+s2_len,clear);
                    176:   }
                    177: }
1.9       pazsan    178: #endif
1.21      anton     179: 
                    180: DCell timeval2us(struct timeval *tvp)
                    181: {
                    182: #ifndef BUGGY_LONG_LONG
                    183:   return (tvp->tv_sec*(DCell)1000000)+tvp->tv_usec;
                    184: #else
                    185:   DCell d2;
                    186:   DCell d1=mmul(tvp->tv_sec,1000000);
                    187:   d2.lo = d1.lo+tvp->tv_usec;
                    188:   d2.hi = d1.hi + (d2.lo<d1.lo);
                    189:   return d2;
                    190: #endif
                    191: }
1.1       anton     192: 
                    193: #define NEWLINE        '\n'
                    194: 
                    195: #ifndef HAVE_RINT
                    196: #define rint(x)        floor((x)+0.5)
                    197: #endif
                    198: 
1.9       pazsan    199: #ifdef HAS_FILE
1.16      anton     200: static char* fileattr[6]={"rb","rb","r+b","r+b","wb","wb"};
1.32      pazsan    201: static char* pfileattr[6]={"r","r","r+","r+","w","w"};
1.1       anton     202: 
                    203: #ifndef O_BINARY
                    204: #define O_BINARY 0
                    205: #endif
                    206: #ifndef O_TEXT
                    207: #define O_TEXT 0
                    208: #endif
                    209: 
                    210: static int ufileattr[6]= {
1.16      anton     211:   O_RDONLY|O_BINARY, O_RDONLY|O_BINARY,
                    212:   O_RDWR  |O_BINARY, O_RDWR  |O_BINARY,
                    213:   O_WRONLY|O_BINARY, O_WRONLY|O_BINARY };
1.9       pazsan    214: #endif
1.1       anton     215: 
1.26      anton     216: /* conversion on fetch */
                    217: 
                    218: #define vm_Cell2f(x)           ((Bool)(x))
                    219: #define vm_Cell2c(x)           ((Char)(x))
                    220: #define vm_Cell2n(x)           ((Cell)x)
                    221: #define vm_Cell2w(x)           ((Cell)x)
                    222: #define vm_Cell2u(x)           ((UCell)(x))
                    223: #define vm_Cell2a_(x)          ((Cell *)(x))
                    224: #define vm_Cell2c_(x)          ((Char *)(x))
                    225: #define vm_Cell2f_(x)          ((Float *)(x))
                    226: #define vm_Cell2df_(x)         ((DFloat *)(x))
                    227: #define vm_Cell2sf_(x)         ((SFloat *)(x))
                    228: #define vm_Cell2xt(x)          ((Xt)(x))
                    229: #define vm_Cell2f83name(x)     ((struct F83Name *)(x))
                    230: #define vm_Cell2longname(x)    ((struct Longname *)(x))
                    231: #define vm_Float2r(x)  (x)
                    232: 
                    233: /* conversion on store */
                    234: 
                    235: #define vm_f2Cell(x)           ((Cell)(x))
                    236: #define vm_c2Cell(x)           ((Cell)(x))
                    237: #define vm_n2Cell(x)           ((Cell)(x))
                    238: #define vm_w2Cell(x)           ((Cell)(x))
                    239: #define vm_u2Cell(x)           ((Cell)(x))
                    240: #define vm_a_2Cell(x)          ((Cell)(x))
                    241: #define vm_c_2Cell(x)          ((Cell)(x))
                    242: #define vm_f_2Cell(x)          ((Cell)(x))
                    243: #define vm_df_2Cell(x)         ((Cell)(x))
                    244: #define vm_sf_2Cell(x)         ((Cell)(x))
                    245: #define vm_xt2Cell(x)          ((Cell)(x))
                    246: #define vm_f83name2Cell(x)     ((Cell)(x))
                    247: #define vm_longname2Cell(x)    ((Cell)(x))
                    248: #define vm_r2Float(x)  (x)
                    249: 
1.29      anton     250: #define vm_Cell2Cell(x)                (x)
                    251: 
1.1       anton     252: /* if machine.h has not defined explicit registers, define them as implicit */
                    253: #ifndef IPREG
                    254: #define IPREG
                    255: #endif
                    256: #ifndef SPREG
                    257: #define SPREG
                    258: #endif
                    259: #ifndef RPREG
                    260: #define RPREG
                    261: #endif
                    262: #ifndef FPREG
                    263: #define FPREG
                    264: #endif
                    265: #ifndef LPREG
                    266: #define LPREG
                    267: #endif
                    268: #ifndef CFAREG
                    269: #define CFAREG
                    270: #endif
                    271: #ifndef UPREG
                    272: #define UPREG
                    273: #endif
                    274: #ifndef TOSREG
                    275: #define TOSREG
                    276: #endif
                    277: #ifndef FTOSREG
                    278: #define FTOSREG
                    279: #endif
                    280: 
                    281: #ifndef CPU_DEP1
                    282: # define CPU_DEP1 0
                    283: #endif
                    284: 
                    285: /* declare and compute cfa for certain threading variants */
                    286: /* warning: this is nonsyntactical; it will not work in place of a statement */
1.12      anton     287: #ifndef GETCFA
1.1       anton     288: #define DOCFA
                    289: #else
                    290: #define DOCFA  Xt cfa; GETCFA(cfa)
                    291: #endif
                    292: 
1.28      anton     293: /* instructions containing these must be the last instruction of a
                    294:    super-instruction (e.g., branches, EXECUTE, and other instructions
                    295:    ending the basic block). Instructions containing SET_IP get this
                    296:    automatically, so you usually don't have to write it.  If you have
                    297:    to write it, write it after IP points to the next instruction.
                    298:    Used for profiling.  Don't write it in a word containing SET_IP, or
                    299:    the following block will be counted twice. */
                    300: #ifdef VM_PROFILING
                    301: #define SUPER_END  vm_count_block(IP)
                    302: #else
                    303: #define SUPER_END
                    304: #endif
1.35      anton     305: #define SUPER_CONTINUE
1.28      anton     306: 
1.10      anton     307: #ifdef GFORTH_DEBUGGING
                    308: /* define some VM registers as global variables, so they survive exceptions;
                    309:    global register variables are not up to the task (according to the 
                    310:    GNU C manual) */
                    311: Xt *ip;
                    312: Cell *rp;
                    313: #endif
                    314: 
1.30      anton     315: Xt *primtable(Label symbols[], Cell size)
                    316: {
                    317: #ifdef DIRECT_THREADED
                    318:   return symbols;
                    319: #else /* !defined(DIRECT_THREADED) */
                    320:   Xt *xts = (Xt *)malloc(size*sizeof(Xt));
                    321:   Cell i;
                    322: 
                    323:   for (i=0; i<size; i++)
                    324:     xts[i] = &symbols[i];
                    325:   return xts;
                    326: #endif /* !defined(DIRECT_THREADED) */
                    327: }
                    328: 
1.34      anton     329: 
                    330: define(enginerest,
                    331: `(Xt *ip0, Cell *sp0, Cell *rp0, Float *fp0, Address lp0)
1.1       anton     332: /* executes code at ip, if ip!=NULL
                    333:    returns array of machine code labels (for use in a loader), if ip==NULL
                    334: */
                    335: {
1.10      anton     336: #ifndef GFORTH_DEBUGGING
                    337:   register Xt *ip IPREG;
                    338:   register Cell *rp RPREG;
                    339: #endif
1.1       anton     340:   register Cell *sp SPREG = sp0;
                    341:   register Float *fp FPREG = fp0;
                    342:   register Address lp LPREG = lp0;
                    343: #ifdef CFA_NEXT
                    344:   register Xt cfa CFAREG;
                    345: #endif
1.11      anton     346: #ifdef MORE_VARS
                    347:   MORE_VARS
                    348: #endif
1.1       anton     349:   register Address up UPREG = UP;
1.24      anton     350:   IF_spTOS(register Cell spTOS TOSREG;)
                    351:   IF_fpTOS(register Float fpTOS FTOSREG;)
1.1       anton     352: #if defined(DOUBLY_INDIRECT)
                    353:   static Label *symbols;
                    354:   static void *routines[]= {
1.27      anton     355: #define MAX_SYMBOLS (sizeof(routines)/sizeof(routines[0]))
1.1       anton     356: #else /* !defined(DOUBLY_INDIRECT) */
                    357:   static Label symbols[]= {
1.27      anton     358: #define MAX_SYMBOLS (sizeof(symbols)/sizeof(symbols[0]))
1.1       anton     359: #endif /* !defined(DOUBLY_INDIRECT) */
1.4       pazsan    360:     (Label)&&docol,
                    361:     (Label)&&docon,
                    362:     (Label)&&dovar,
                    363:     (Label)&&douser,
                    364:     (Label)&&dodefer,
                    365:     (Label)&&dofield,
                    366:     (Label)&&dodoes,
1.1       anton     367:     /* the following entry is normally unused;
1.34      anton     368:        it is there because its index indicates a does-handler */
1.7       pazsan    369:     CPU_DEP1,
1.34      anton     370: #define INST_ADDR(name) (Label)&&I_##name
                    371: #include "prim_lab.i"
                    372: #undef INST_ADDR
                    373:     (Label)&&after_last,
                    374:     (Label)0,
                    375: #ifdef IN_ENGINE2
                    376: #define INST_ADDR(name) (Label)&&J_##name
1.1       anton     377: #include "prim_lab.i"
1.34      anton     378: #undef INST_ADDR
                    379: #endif
1.1       anton     380:   };
                    381: #ifdef CPU_DEP2
                    382:   CPU_DEP2
                    383: #endif
                    384: 
1.10      anton     385:   ip = ip0;
                    386:   rp = rp0;
1.1       anton     387: #ifdef DEBUG
                    388:   fprintf(stderr,"ip=%x, sp=%x, rp=%x, fp=%x, lp=%x, up=%x\n",
                    389:           (unsigned)ip,(unsigned)sp,(unsigned)rp,
                    390:          (unsigned)fp,(unsigned)lp,(unsigned)up);
                    391: #endif
                    392: 
                    393:   if (ip == NULL) {
                    394: #if defined(DOUBLY_INDIRECT)
1.3       anton     395: #define CODE_OFFSET (22*sizeof(Cell))
1.1       anton     396:     int i;
1.3       anton     397:     Cell code_offset = offset_image? CODE_OFFSET : 0;
1.7       pazsan    398: 
1.3       anton     399:     symbols = (Label *)(malloc(MAX_SYMBOLS*sizeof(Cell)+CODE_OFFSET)+code_offset);
1.1       anton     400:     for (i=0; i<DOESJUMP+1; i++)
1.7       pazsan    401:       symbols[i] = (Label)routines[i];
1.1       anton     402:     for (; routines[i]!=0; i++) {
                    403:       if (i>=MAX_SYMBOLS) {
                    404:        fprintf(stderr,"gforth-ditc: more than %d primitives\n",MAX_SYMBOLS);
                    405:        exit(1);
1.20      anton     406:       }
                    407:       symbols[i] = &routines[i];
1.1       anton     408:     }
1.20      anton     409: #endif /* defined(DOUBLY_INDIRECT) */
                    410:     return symbols;
1.7       pazsan    411:   }
1.1       anton     412: 
1.24      anton     413:   IF_spTOS(spTOS = sp[0]);
                    414:   IF_fpTOS(fpTOS = fp[0]);
1.7       pazsan    415: /*  prep_terminal(); */
1.11      anton     416:   SET_IP(ip);
1.28      anton     417:   SUPER_END; /* count the first block, too */
1.1       anton     418:   NEXT;
                    419: 
1.11      anton     420: 
1.1       anton     421: #ifdef CPU_DEP3
                    422:   CPU_DEP3
                    423: #endif
                    424:   
                    425:  docol:
                    426:   {
                    427:     DOCFA;
                    428: #ifdef DEBUG
                    429:     fprintf(stderr,"%08lx: col: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    430: #endif
                    431: #ifdef CISC_NEXT
                    432:     /* this is the simple version */
                    433:     *--rp = (Cell)ip;
1.11      anton     434:     SET_IP((Xt *)PFA1(cfa));
1.28      anton     435:     SUPER_END;
1.1       anton     436:     NEXT;
                    437: #else
1.11      anton     438:     /* this one is important, so we help the compiler optimizing */
1.1       anton     439:     {
                    440:       DEF_CA
1.11      anton     441:       rp[-1] = (Cell)ip;
                    442:       SET_IP((Xt *)PFA1(cfa));
1.28      anton     443:       SUPER_END;
1.11      anton     444:       NEXT_P1;
                    445:       rp--;
                    446:       NEXT_P2;
1.1       anton     447:     }
                    448: #endif
                    449:   }
                    450: 
                    451:  docon:
                    452:   {
                    453:     DOCFA;
                    454: #ifdef DEBUG
                    455:     fprintf(stderr,"%08lx: con: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
                    456: #endif
                    457: #ifdef USE_TOS
1.24      anton     458:     *sp-- = spTOS;
                    459:     spTOS = *(Cell *)PFA1(cfa);
1.1       anton     460: #else
                    461:     *--sp = *(Cell *)PFA1(cfa);
                    462: #endif
                    463:   }
                    464:   NEXT_P0;
                    465:   NEXT;
                    466:   
                    467:  dovar:
                    468:   {
                    469:     DOCFA;
                    470: #ifdef DEBUG
                    471:     fprintf(stderr,"%08lx: var: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    472: #endif
                    473: #ifdef USE_TOS
1.24      anton     474:     *sp-- = spTOS;
                    475:     spTOS = (Cell)PFA1(cfa);
1.1       anton     476: #else
                    477:     *--sp = (Cell)PFA1(cfa);
                    478: #endif
                    479:   }
                    480:   NEXT_P0;
                    481:   NEXT;
                    482:   
                    483:  douser:
                    484:   {
                    485:     DOCFA;
                    486: #ifdef DEBUG
                    487:     fprintf(stderr,"%08lx: user: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    488: #endif
                    489: #ifdef USE_TOS
1.24      anton     490:     *sp-- = spTOS;
                    491:     spTOS = (Cell)(up+*(Cell*)PFA1(cfa));
1.1       anton     492: #else
                    493:     *--sp = (Cell)(up+*(Cell*)PFA1(cfa));
                    494: #endif
                    495:   }
                    496:   NEXT_P0;
                    497:   NEXT;
                    498:   
                    499:  dodefer:
                    500:   {
                    501:     DOCFA;
                    502: #ifdef DEBUG
                    503:     fprintf(stderr,"%08lx: defer: %08lx\n",(Cell)ip,*(Cell*)PFA1(cfa));
                    504: #endif
1.28      anton     505:     SUPER_END;
1.1       anton     506:     EXEC(*(Xt *)PFA1(cfa));
                    507:   }
                    508: 
                    509:  dofield:
                    510:   {
                    511:     DOCFA;
                    512: #ifdef DEBUG
                    513:     fprintf(stderr,"%08lx: field: %08lx\n",(Cell)ip,(Cell)PFA1(cfa));
                    514: #endif
1.24      anton     515:     spTOS += *(Cell*)PFA1(cfa);
1.1       anton     516:   }
                    517:   NEXT_P0;
                    518:   NEXT;
                    519: 
                    520:  dodoes:
                    521:   /* this assumes the following structure:
                    522:      defining-word:
                    523:      
                    524:      ...
                    525:      DOES>
                    526:      (possible padding)
                    527:      possibly handler: jmp dodoes
                    528:      (possible branch delay slot(s))
                    529:      Forth code after DOES>
                    530:      
                    531:      defined word:
                    532:      
                    533:      cfa: address of or jump to handler OR
                    534:           address of or jump to dodoes, address of DOES-code
                    535:      pfa:
                    536:      
                    537:      */
                    538:   {
                    539:     DOCFA;
                    540: 
                    541:     /*    fprintf(stderr, "Got CFA %08lx at doescode %08lx/%08lx: does: %08lx\n",cfa,(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));*/
                    542: #ifdef DEBUG
                    543:     fprintf(stderr,"%08lx/%08lx: does: %08lx\n",(Cell)ip,(Cell)PFA(cfa),(Cell)DOES_CODE1(cfa));
                    544:     fflush(stderr);
                    545: #endif
                    546:     *--rp = (Cell)ip;
                    547:     /* PFA1 might collide with DOES_CODE1 here, so we use PFA */
                    548: #ifdef USE_TOS
1.24      anton     549:     *sp-- = spTOS;
                    550:     spTOS = (Cell)PFA(cfa);
1.1       anton     551: #else
                    552:     *--sp = (Cell)PFA(cfa);
                    553: #endif
1.11      anton     554:     SET_IP(DOES_CODE1(cfa));
1.28      anton     555:     SUPER_END;
1.24      anton     556:     /*    fprintf(stderr,"TOS = %08lx, IP=%08lx\n", spTOS, IP);*/
1.1       anton     557:   }
                    558:   NEXT;
                    559: 
1.34      anton     560: #ifndef IN_ENGINE2
1.33      anton     561: #define LABEL(name) I_##name
1.34      anton     562: #else
                    563: #define LABEL(name) J_##name: asm(".skip 16"); I_##name
                    564: #endif
1.1       anton     565: #include "prim.i"
1.34      anton     566: #undef LABEL
                    567:   after_last: return (Label *)0;
                    568:   /*needed only to get the length of the last primitive */
                    569: }'
                    570: )
                    571: 
                    572: Label *engine enginerest
                    573: 
                    574: #define IN_ENGINE2
                    575: Label *engine2 enginerest
                    576: 

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