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   1 /* asmain.c */
   2
   3 /*
   4  * (C) Copyright 1989-1995
   5  * All Rights Reserved
   6  *
   7  * Alan R. Baldwin
   8  * 721 Berkeley St.
   9  * Kent, Ohio  44240
  10  */
  11
  12 /*
  13  * Extensions: P. Felber
  14  */
  15
  16 #include <stdio.h>
  17 #include <setjmp.h>
  18 #include <string.h>
  19
  20 #ifdef SDK
  21 #include <stdlib.h>
  22 #include <math.h>
  23 #undef HUGE
  24 #endif
  25 #include "asm.h"
  26 #include "z80.h"
  27
  28 /*)Module       asmain.c
  29  *
  30  *      The module asmain.c includes the command argument parser,
  31  *      the three pass sequencer, and the machine independent
  32  *      assembler parsing code.
  33  *
  34  *      asmain.c contains the following functions:
  35  *              VOID    main(argc, argv)
  36  *              VOID    asexit()
  37  *              VOID    asmbl()
  38  *              FILE *  afile(fn, ft, wf)
  39  *              VOID    newdot(nap)
  40  *              VOID    phase(ap, a)
  41  *              VOID    usage()
  42  *
  43  *      asmain.c contains the array char *usetxt[] which
  44  *      references the usage text strings printed by usage().
  45  */
  46
  47 /*)Function     VOID    main(argc, argv)
  48  *
  49  *              int     argc            argument count
  50  *              char *  argv            array of pointers to argument strings
  51  *
  52  *      The function main() is the entry point to the assembler.
  53  *      The purpose of main() is to (1) parse the command line
  54  *      arguments for options and source file specifications and
  55  *      (2) to process the source files through the 3 pass assembler.
  56  *      Before each assembler pass various variables are initialized
  57  *      and source files are rewound to their beginning.  During each
  58  *      assembler pass each assembler-source text line is processed.
  59  *      After each assembler pass the assembler information is flushed
  60  *      to any opened output files and the if-else-endif processing
  61  *      is checked for proper termination.
  62  *
  63  *      The function main() is also responsible for opening all
  64  *      output files (REL, LST, and SYM), sequencing the global (-g)
  65  *      and all-global (-a) variable definitions, and dumping the
  66  *      REL file header information.
  67  *
  68  *      local variables:
  69  *              char *  p               pointer to argument string
  70  *              int     c               character from argument string
  71  *              int     i               argument loop counter
  72  *              area *  ap              pointer to area structure
  73  *
  74  *      global variables:
  75  *              int     aflag           -a, make all symbols global flag
  76  *              char    afn[]           afile() constructed filespec
  77  *              area *  areap           pointer to an area structure
  78  *              int     cb[]            array of assembler output values
  79  *              int     cbt[]           array of assembler relocation types
  80  *                                      describing the data in cb[]
  81  *              int     cfile           current file handle index
  82  *                                      of input assembly files
  83  *              int *   cp              pointer to assembler output array cb[]
  84  *              int *   cpt             pointer to assembler relocation type
  85  *                                      output array cbt[]
  86  *              char    eb[]            array of generated error codes
  87  *              char *  ep              pointer into error list array eb[]
  88  *              int     fflag           -f(f), relocations flagged flag
  89  *              int     flevel          IF-ELSE-ENDIF flag will be non
  90  *                                      zero for false conditional case
  91  *              Addr_T  fuzz            tracks pass to pass changes in the
  92  *                                      address of symbols caused by
  93  *                                      variable length instruction formats
  94  *              int     gflag           -g, make undefined symbols global flag
  95  *              char    ib[]            assembler-source text line
  96  *              int     inpfil          count of assembler
  97  *                                      input files specified
  98  *              int     ifcnd[]         array of IF statement condition
  99  *                                      values (0 = FALSE) indexed by tlevel
 100  *              int     iflvl[]         array of IF-ELSE-ENDIF flevel
 101  *                                      values indexed by tlevel
 102  *              int     incfil          current file handle index
 103  *                                      for include files
 104  *              char *  ip              pointer into the assembler-source
 105  *                                      text line in ib[]
 106  *              jmp_buf jump_env        compiler dependent structure
 107  *                                      used by setjmp() and longjmp()
 108  *              int     lflag           -l, generate listing flag
 109  *              int     line            current assembler source
 110  *                                      line number
 111  *              int     lop             current line number on page
 112  *              int     oflag           -o, generate relocatable output flag
 113  *              int     page            current page number
 114  *              int     pflag           enable listing pagination
 115  *              int     pass            assembler pass number
 116  *              int     radix           current number conversion radix:
 117  *                                      2 (binary), 8 (octal), 10 (decimal),
 118  *                                      16 (hexadecimal)
 119  *              int     sflag           -s, generate symbol table flag
 120  *              char    srcfn[][]       array of source file names
 121  *              int     srcline[]       current source file line
 122  *              char    stb[]           Subtitle string buffer
 123  *              sym *   symp            pointer to a symbol structure
 124  *              int     tlevel          current conditional level
 125  *              int     xflag           -x, listing radix flag
 126  *              FILE *  lfp             list output file handle
 127  *              FILE *  ofp             relocation output file handle
 128  *              FILE *  tfp             symbol table output file handle
 129  *              FILE *  sfp[]           array of assembler-source file handles
 130  *
 131  *      called functions:
 132  *              FILE *  afile()         asmain.c
 133  *              VOID    allglob()       assym.c
 134  *              VOID    asexit()        asmain.c
 135  *              VOID    diag()          assubr.c
 136  *              VOID    err()           assubr.c
 137  *              int     fprintf()       c-library
 138  *              int     getline()       aslex.c
 139  *              VOID    list()          aslist.c
 140  *              VOID    lstsym()        aslist.c
 141  *              VOID    minit()         ___mch.c
 142  *              VOID    newdot()        asmain.c
 143  *              VOID    outchk()        asout.c
 144  *              VOID    outgsd()        asout.c
 145  *              int     rewind()        c-library
 146  *              int     setjmp()        c-library
 147  *              VOID    symglob()       assym.c
 148  *              VOID    syminit()       assym.c
 149  *              VOID    usage()         asmain.c
 150  *
 151  *      side effects:
 152  *              Completion of main() completes the assembly process.
 153  *              REL, LST, and/or SYM files may be generated.
 154  */
 155
 156 int
 157 main(int argc, char **argv)
 158 {
 159         register char *p;
 160         register int c, i;
 161         struct area *ap;
 162
 163 #ifdef SDK
 164         inpfil = -2;
 165 #else /* SDK */
 166         fprintf(stdout, "\n");
 167         inpfil = -1;
 168 #endif /* SDK */
 169         pflag = 1;
 170         for (i=1; i<argc; ++i) {
 171                 p = argv[i];
 172                 if (*p == '-') {
 173                         if (inpfil >= 0)
 174                                 usage();
 175                         ++p;
 176                         while ((c = *p++) != 0)
 177                                 switch(c) {
 178
 179                                 case 'a':
 180                                 case 'A':
 181                                         ++aflag;
 182                                         break;
 183
 184                                 case 'g':
 185                                 case 'G':
 186                                         ++gflag;
 187                                         break;
 188
 189                                 case 'l':
 190                                 case 'L':
 191                                         ++lflag;
 192                                         break;
 193
 194                                 case 'o':
 195                                 case 'O':
 196                                         ++oflag;
 197                                         break;
 198
 199                                 case 's':
 200                                 case 'S':
 201                                         ++sflag;
 202                                         break;
 203
 204                                 case 'p':
 205                                 case 'P':
 206                                         pflag = 0;
 207                                         break;
 208
 209                                 case 'x':
 210                                 case 'X':
 211                                         xflag = 0;
 212                                         break;
 213
 214                                 case 'q':
 215                                 case 'Q':
 216                                         xflag = 1;
 217                                         break;
 218
 219                                 case 'd':
 220                                 case 'D':
 221                                         xflag = 2;
 222                                         break;
 223
 224                                 case 'f':
 225                                 case 'F':
 226                                         ++fflag;
 227                                         break;
 228
 229                                 default:
 230                                         usage();
 231                                 }
 232                 } else {
 233 #ifdef SDK
 234                         if(inpfil != -2) {
 235 #endif /* SDK */
 236                         if (++inpfil == MAXFIL) {
 237                                 fprintf(stderr, "too many input files\n");
 238                                 asexit(1);
 239                         }
 240                         sfp[inpfil] = afile(p, "", 0);
 241                         strcpy(srcfn[inpfil],afn);
 242 #ifdef SDK
 243                         } else
 244                                 inpfil++;
 245                         if (inpfil == -1) {
 246                                 if (lflag)
 247                                         lfp = afile(p, "lst", 1);
 248                                 if (oflag)
 249                                         ofp = afile(p, "", 1);
 250                                 if (sflag)
 251                                         tfp = afile(p, "sym", 1);
 252                         }
 253 #else /* SDK */
 254                         if (inpfil == 0) {
 255                                 if (lflag)
 256                                         lfp = afile(p, "LST", 1);
 257                                 if (oflag)
 258                                         ofp = afile(p, "REL", 1);
 259                                 if (sflag)
 260                                         tfp = afile(p, "SYM", 1);
 261                         }
 262 #endif /* SDK */
 263                 }
 264         }
 265         if (inpfil < 0)
 266                 usage();
 267         syminit();
 268         for (pass=0; pass<3; ++pass) {
 269                 if (gflag && pass == 1)
 270                         symglob();
 271                 if (aflag && pass == 1)
 272                         allglob();
 273                 if (oflag && pass == 2)
 274                         outgsd();
 275                 flevel = 0;
 276                 tlevel = 0;
 277                 ifcnd[0] = 0;
 278                 iflvl[0] = 0;
 279                 radix = 10;
 280                 srcline[0] = 0;
 281                 page = 0;
 282                 stb[0] = 0;
 283                 lop  = NLPP;
 284                 cfile = 0;
 285                 incfil = -1;
 286                 for (i = 0; i <= inpfil; i++)
 287                         rewind(sfp[i]);
 288                 ap = areap;
 289                 while (ap) {
 290                         ap->a_fuzz = 0;
 291                         ap->a_size = 0;
 292                         ap = ap->a_ap;
 293                 }
 294                 fuzz = 0;
 295                 dot.s_addr = 0;
 296                 dot.s_area = &dca;
 297                 symp = &dot;
 298                 minit();
 299                 while (getline()) {
 300                         cp = cb;
 301                         cpt = cbt;
 302                         ep = eb;
 303                         ip = ib;
 304                         if (setjmp(jump_env) == 0)
 305                                 asmbl();
 306                         if (pass == 2) {
 307                                 diag();
 308                                 list();
 309                         }
 310                 }
 311                 newdot(dot.s_area); /* Flush area info */
 312                 if (flevel || tlevel)
 313                         err('i');
 314         }
 315         if (oflag)
 316                 outchk(HUGE, HUGE);  /* Flush */
 317         if (sflag) {
 318                 lstsym(tfp);
 319         } else
 320         if (lflag) {
 321                 lstsym(lfp);
 322         }
 323         asexit(aserr != 0);
 324         /* Never reached */
 325         return 0;
 326 }
 327
 328 /*)Function     VOID    asexit(i)
 329  *
 330  *                      int     i       exit code
 331  *
 332  *      The function asexit() explicitly closes all open
 333  *      files and then terminates the program.
 334  *
 335  *      local variables:
 336  *              int     j               loop counter
 337  *
 338  *      global variables:
 339  *              FILE *  ifp[]           array of include-file file handles
 340  *              FILE *  lfp             list output file handle
 341  *              FILE *  ofp             relocation output file handle
 342  *              FILE *  tfp             symbol table output file handle
 343  *              FILE *  sfp[]           array of assembler-source file handles
 344  *
 345  *      functions called:
 346  *              int     fclose()        c-library
 347  *              VOID    exit()          c-library
 348  *
 349  *      side effects:
 350  *              All files closed. Program terminates.
 351  */
 352
 353 VOID
 354 asexit(i)
 355 int i;
 356 {
 357         int j;
 358
 359         if (lfp != NULL) fclose(lfp);
 360         if (ofp != NULL) fclose(ofp);
 361         if (tfp != NULL) fclose(tfp);
 362
 363         for (j=0; j<MAXFIL && sfp[j] != NULL; j++) {
 364                 fclose(sfp[j]);
 365         }
 366
 367         for (j=0; j<MAXINC && ifp[j] != NULL; j++) {
 368                 fclose(ifp[j]);
 369         }
 370
 371         exit(i);
 372 }
 373
 374 /*)Function     VOID    asmbl()
 375  *
 376  *      The function asmbl() scans the assembler-source text for
 377  *      (1) labels, global labels, equates, global equates, and local
 378  *      symbols, (2) .if, .else, .endif, and .page directives,
 379  *      (3) machine independent assembler directives, and (4) machine
 380  *      dependent mnemonics.
 381  *
 382  *      local variables:
 383  *              mne *   mp              pointer to a mne structure
 384  *              sym *   sp              pointer to a sym structure
 385  *              tsym *  tp              pointer to a tsym structure
 386  *              int     c               character from assembler-source
 387  *                                      text line
 388  *              area *  ap              pointer to an area structure
 389  *              expr    e1              expression structure
 390  *              char    id[]            id string
 391  *              char    opt[]           options string
 392  *              char    fn[]            filename string
 393  *              char *  p               pointer into a string
 394  *              int     d               temporary value
 395  *              int     n               temporary value
 396  *              int     uaf             user area options flag
 397  *              int     uf              area options
 398  *
 399  *      global variables:
 400  *              area *  areap           pointer to an area structure
 401  *              char    ctype[]         array of character types, one per
 402  *                                      ASCII character
 403  *              int     flevel          IF-ELSE-ENDIF flag will be non
 404  *                                      zero for false conditional case
 405  *              Addr_T  fuzz            tracks pass to pass changes in the
 406  *                                      address of symbols caused by
 407  *                                      variable length instruction formats
 408  *              int     ifcnd[]         array of IF statement condition
 409  *                                      values (0 = FALSE) indexed by tlevel
 410  *              int     iflvl[]         array of IF-ELSE-ENDIF flevel
 411  *                                      values indexed by tlevel
 412  *              FILE *  ifp[]           array of include-file file handles
 413  *              char    incfn[][]       array of include file names
 414  *              int     incline[]       current include file line
 415  *              int     incfil          current file handle index
 416  *                                      for include files
 417  *              Addr_T  laddr           address of current assembler line
 418  *                                      or value of .if argument
 419  *              int     lmode           listing mode
 420  *              int     lop             current line number on page
 421  *              char    module[]        module name string
 422  *              int     pass            assembler pass number
 423  *              int     radix           current number conversion radix:
 424  *                                      2 (binary), 8 (octal), 10 (decimal),
 425  *                                      16 (hexadecimal)
 426  *              char    stb[]           Subtitle string buffer
 427  *              sym *   symp            pointer to a symbol structure
 428  *              char    tb[]            Title string buffer
 429  *              int     tlevel          current conditional level
 430  *
 431  *      functions called:
 432  *              Addr_T  absexpr()       asexpr.c
 433  *              area *  alookup()       assym.c
 434  *              VOID    clrexpr()       asexpr.c
 435  *              int     digit()         asexpr.c
 436  *              char    endline()       aslex.c
 437  *              VOID    err()           assubr.c
 438  *              VOID    expr()          asexpr.c
 439  *              FILE *  fopen()         c-library
 440  *              char    get()           aslex.c
 441  *              VOID    getid()         aslex.c
 442  *              int     getmap()        aslex.c
 443  *              char    getnb()         aslex.c
 444  *              VOID    getst()         aslex.c
 445  *              sym *   lookup()        assym.c
 446  *              VOID    machine()       ___mch.c
 447  *              mne *   mlookup()       assym.c
 448  *              int     more()          aslex.c
 449  *              VOID *  new()           assym.c
 450  *              VOID    newdot()        asmain.c
 451  *              VOID    outall()        asout.c
 452  *              VOID    outab()         asout.c
 453  *              VOID    outchk()        asout.c
 454  *              VOID    outrb()         asout.c
 455  *              VOID    outrw()         asout.c
 456  *              VOID    phase()         asmain.c
 457  *              VOID    qerr()          assubr.c
 458  *              char *  strcpy()        c-library
 459  *              char *  strncpy()       c-library
 460  *              VOID    unget()         aslex.c
 461  */
 462
 463 VOID
 464 asmbl()
 465 {
 466         register struct mne *mp;
 467         register struct sym *sp;
 468         register struct tsym *tp;
 469         register int c;
 470         struct area  *ap;
 471         struct expr e1;
 472         char id[NCPS];
 473         char opt[NCPS];
 474         char fn[FILSPC];
 475         char *p;
 476         int d, n, uaf, uf;
 477
 478 #ifdef SDK
 479         double f1, f2;
 480         unsigned int mantissa, exponent;
 481         const signed char readbuffer[80];
 482 #endif
 483         laddr = dot.s_addr;
 484         lmode = SLIST;
 485 loop:
 486         if ((c=endline()) == 0) { return; }
 487         /*
 488          * If the first character is a digit then assume
 489          * a local symbol is being specified.  The symbol
 490          * must end with $: to be valid.
 491          *      pass 0:
 492          *              Construct a tsym structure at the first
 493          *              occurance of the symbol.  Flag the symbol
 494          *              as multiply defined if not the first occurance.
 495          *      pass 1:
 496          *              Load area, address, and fuzz values
 497          *              into structure tsym.
 498          *      pass 2:
 499          *              Check for assembler phase error and
 500          *              multiply defined error.
 501          */
 502         if (ctype[c] & DIGIT) {
 503                 if (flevel)
 504                         return;
 505                 n = 0;
 506                 while ((d = digit(c, 10)) >= 0) {
 507                         n = 10*n + d;
 508                         c = get();
 509                 }
 510                 if (c != '$' || get() != ':')
 511                         qerr();
 512                 tp = symp->s_tsym;
 513                 if (pass == 0) {
 514                         while (tp) {
 515                                 if (n == tp->t_num) {
 516                                         tp->t_flg |= S_MDF;
 517                                         break;
 518                                 }
 519                                 tp = tp->t_lnk;
 520                         }
 521                         if (tp == NULL) {
 522                                 tp=(struct tsym *) new (sizeof(struct tsym));
 523                                 tp->t_lnk = symp->s_tsym;
 524                                 tp->t_num = n;
 525                                 tp->t_flg = 0;
 526                                 tp->t_area = dot.s_area;
 527                                 tp->t_addr = dot.s_addr;
 528                                 symp->s_tsym = tp;
 529                         }
 530                 } else {
 531                         while (tp) {
 532                                 if (n == tp->t_num) {
 533                                         break;
 534                                 }
 535                                 tp = tp->t_lnk;
 536                         }
 537                         if (tp) {
 538                                 if (pass == 1) {
 539                                         fuzz = tp->t_addr - dot.s_addr;
 540                                         tp->t_area = dot.s_area;
 541                                         tp->t_addr = dot.s_addr;
 542                                 } else {
 543                                         phase(tp->t_area, tp->t_addr);
 544                                         if (tp->t_flg & S_MDF)
 545                                                 err('m');
 546                                 }
 547                         } else {
 548                                 err('u');
 549                         }
 550                 }
 551                 lmode = ALIST;
 552                 goto loop;
 553         }
 554         /*
 555          * If the first character is a letter then assume a lable,
 556          * symbol, assembler directive, or assembler mnemonic is
 557          * being processed.
 558          */
 559         if ((ctype[c] & LETTER) == 0) {
 560                 if (flevel) {
 561                         return;
 562                 } else {
 563                         qerr();
 564                 }
 565         }
 566         getid(id, c);
 567         c = getnb();
 568         /*
 569          * If the next character is a : then a label is being processed.
 570          * A double :: defines a global label.  If this is new label
 571          * then create a symbol structure.
 572          *      pass 0:
 573          *              Flag multiply defined labels.
 574          *      pass 1:
 575          *              Load area, address, and fuzz values
 576          *              into structure symp.
 577          *      pass 2:
 578          *              Check for assembler phase error and
 579          *              multiply defined error.
 580          */
 581         if (c == ':') {
 582                 if (flevel)
 583                         return;
 584                 if ((c = get()) != ':') {
 585                         unget(c);
 586                         c = 0;
 587                 }
 588                 symp = lookup(id);
 589                 if (symp == &dot)
 590                         err('.');
 591                 if (pass == 0)
 592                         if ((symp->s_type != S_NEW) &&
 593                            ((symp->s_flag & S_ASG) == 0))
 594                                 symp->s_flag |= S_MDF;
 595                 if (pass != 2) {
 596                         fuzz = symp->s_addr - dot.s_addr;
 597                         symp->s_type = S_USER;
 598                         symp->s_area = dot.s_area;
 599                         symp->s_addr = dot.s_addr;
 600                 } else {
 601                         if (symp->s_flag & S_MDF)
 602                                 err('m');
 603                         phase(symp->s_area, symp->s_addr);
 604                 }
 605                 if (c) {
 606                         symp->s_flag |= S_GBL;
 607                 }
 608                 lmode = ALIST;
 609                 goto loop;
 610         }
 611         /*
 612          * If the next character is a = then an equate is being processed.
 613          * A double == defines a global equate.  If this is new variable
 614          * then create a symbol structure.
 615          */
 616         if (c == '=') {
 617                 if (flevel)
 618                         return;
 619                 if ((c = get()) != '=') {
 620                         unget(c);
 621                         c = 0;
 622                 }
 623                 clrexpr(&e1);
 624                 expr(&e1, 0);
 625                 sp = lookup(id);
 626                 if (sp == &dot) {
 627                         outall();
 628                         if (e1.e_flag || e1.e_base.e_ap != dot.s_area)
 629                                 err('.');
 630                 } else
 631                 if (sp->s_type != S_NEW && (sp->s_flag & S_ASG) == 0) {
 632                         err('m');
 633                 }
 634                 sp->s_type = S_USER;
 635                 sp->s_area = e1.e_base.e_ap;
 636                 sp->s_addr = laddr = e1.e_addr;
 637                 sp->s_flag |= S_ASG;
 638                 if (c) {
 639                         sp->s_flag |= S_GBL;
 640                 }
 641                 lmode = ELIST;
 642                 goto loop;
 643         }
 644         unget(c);
 645         lmode = flevel ? SLIST : CLIST;
 646         if ((mp = mlookup(id)) == NULL) {
 647                 if (!flevel)
 648                         err('o');
 649                 return;
 650         }
 651         /*
 652          * If we have gotten this far then we have found an
 653          * assembler directive or an assembler mnemonic.
 654          *
 655          * Check for .if, .else, .endif, and .page directives
 656          * which are not controlled by the conditional flags
 657          */
 658         switch (mp->m_type) {
 659
 660         case S_IF:
 661                 n = absexpr();
 662                 if (tlevel < MAXIF) {
 663                         ++tlevel;
 664                         ifcnd[tlevel] = n;
 665                         iflvl[tlevel] = flevel;
 666                         if (n == 0) {
 667                                 ++flevel;
 668                         }
 669                 } else {
 670                         err('i');
 671                 }
 672                 lmode = ELIST;
 673                 laddr = n;
 674                 return;
 675
 676         case S_ELSE:
 677                 if (ifcnd[tlevel]) {
 678                         if (++flevel > (iflvl[tlevel]+1)) {
 679                                 err('i');
 680                         }
 681                 } else {
 682                         if (--flevel < iflvl[tlevel]) {
 683                                 err('i');
 684                         }
 685                 }
 686                 lmode = SLIST;
 687                 return;
 688
 689         case S_ENDIF:
 690                 if (tlevel) {
 691                         flevel = iflvl[tlevel--];
 692                 } else {
 693                         err('i');
 694                 }
 695                 lmode = SLIST;
 696                 return;
 697
 698         case S_PAGE:
 699                 lop = NLPP;
 700                 lmode = NLIST;
 701                 return;
 702
 703         default:
 704                 break;
 705         }
 706         if (flevel)
 707                 return;
 708         /*
 709          * If we are not in a false state for .if/.else then
 710          * process the assembler directives here.
 711          */
 712         switch (mp->m_type) {
 713
 714         case S_EVEN:
 715                 outall();
 716                 laddr = dot.s_addr = (dot.s_addr + 1) & ~1;
 717                 lmode = ALIST;
 718                 break;
 719
 720         case S_ODD:
 721                 outall();
 722                 laddr = dot.s_addr |= 1;
 723                 lmode = ALIST;
 724                 break;
 725
 726         case S_BYTE:
 727         case S_WORD:
 728                 do {
 729                         clrexpr(&e1);
 730                         expr(&e1, 0);
 731                         if (mp->m_type == S_BYTE) {
 732                                 outrb(&e1, R_NORM);
 733                         } else {
 734                                 outrw(&e1, R_NORM);
 735                         }
 736                 } while ((c = getnb()) == ',');
 737                 unget(c);
 738                 break;
 739
 740 #ifdef SDK
 741         case S_FLOAT:
 742                 do {
 743                         getid( readbuffer, ' ' ); /* Hack :) */
 744                         if ((c=getnb())=='.')
 745                           {
 746                                   getid(&readbuffer[strlen(readbuffer)],'.');
 747                           }
 748                         else
 749                             unget(c);
 750
 751                         f1 = strtod( readbuffer, (char **)NULL );
 752                         /* Convert f1 to a gb-lib type fp
 753                          * 24 bit mantissa followed by 7 bit exp and 1 bit sign
 754                         */
 755
 756                         if (f1!=0)
 757                           {
 758
 759                                   f2 = floor(log(fabs(f1))/log(2))+1;
 760                                   mantissa = (unsigned int) ((0x1000000*fabs(f1))/exp(f2*log(2))) ;
 761                                   mantissa &=0xffffff;
 762                                   exponent = (unsigned int) (f2 + 0x40) ;
 763                                   if (f1<0)
 764                                       exponent |=0x80;
 765                           }
 766
 767                         else
 768                           {
 769                                   mantissa=0;
 770                                   exponent=0;
 771                           }
 772
 773                         outab(mantissa&0xff);
 774                         outab((mantissa>>8)&0xff);
 775                         outab((mantissa>>16)&0xff);
 776                         outab(exponent&0xff);
 777
 778                 } while ((c = getnb()) == ',');
 779                 unget(c);
 780                 break;
 781 #endif
 782
 783         case S_ASCII:
 784         case S_ASCIZ:
 785                 if ((d = getnb()) == '\0')
 786                         qerr();
 787                 while ((c = getmap(d)) >= 0)
 788                         outab(c);
 789                 if (mp->m_type == S_ASCIZ)
 790                         outab(0);
 791                 break;
 792
 793         case S_ASCIS:
 794                 if ((d = getnb()) == '\0')
 795                         qerr();
 796                 c = getmap(d);
 797                 while (c >= 0) {
 798                         if ((n = getmap(d)) >= 0) {
 799                                 outab(c);
 800                         } else {
 801                                 outab(c | 0x80);
 802                         }
 803                         c = n;
 804                 }
 805                 break;
 806
 807         case S_BLK:
 808                 clrexpr(&e1);
 809                 expr(&e1, 0);
 810                 dot.s_addr += e1.e_addr*mp->m_valu;
 811                 outchk(HUGE,HUGE);
 812                 lmode = BLIST;
 813                 break;
 814
 815         case S_TITLE:
 816                 p = tb;
 817                 if ((c = getnb()) != 0) {
 818                         do {
 819                                 if (p < &tb[NTITL-1])
 820                                         *p++ = c;
 821                         } while ((c = get()) != 0);
 822                 }
 823                 *p = 0;
 824                 unget(c);
 825                 lmode = SLIST;
 826                 break;
 827
 828         case S_SBTL:
 829                 p = stb;
 830                 if ((c = getnb()) != 0) {
 831                         do {
 832                                 if (p < &stb[NSBTL-1])
 833                                         *p++ = c;
 834                         } while ((c = get()) != 0);
 835                 }
 836                 *p = 0;
 837                 unget(c);
 838                 lmode = SLIST;
 839                 break;
 840
 841         case S_MODUL:
 842                 getst(id, getnb()); // a module can start with a digit
 843                 if (pass == 0) {
 844                         if (module[0]) {
 845                                 err('m');
 846                         } else {
 847                                 strncpy(module, id, NCPS);
 848                         }
 849                 }
 850                 lmode = SLIST;
 851                 break;
 852
 853     case S_OPTSDCC:
 854                 p = optsdcc;
 855                 if ((c = getnb()) != 0) {
 856                         do {
 857                                 if (p < &optsdcc[NINPUT-1])
 858                                         *p++ = c;
 859                         } while ((c = get()) != 0);
 860                 }
 861                 *p = 0;
 862                 unget(c);
 863                 lmode = SLIST;
 864         break;
 865
 866         case S_GLOBL:
 867                 do {
 868                         getid(id, -1);
 869                         sp = lookup(id);
 870                         sp->s_flag |= S_GBL;
 871                 } while ((c = getnb()) == ',');
 872                 unget(c);
 873                 lmode = SLIST;
 874                 break;
 875
 876         case S_DAREA:
 877                 getid(id, -1);
 878                 uaf = 0;
 879                 uf  = A_CON|A_REL;
 880                 if ((c = getnb()) == '(') {
 881                         do {
 882                                 getid(opt, -1);
 883                                 mp = mlookup(opt);
 884                                 if (mp && mp->m_type == S_ATYP) {
 885                                         ++uaf;
 886                                         uf |= mp->m_valu;
 887                                 } else {
 888                                         err('u');
 889                                 }
 890                         } while ((c = getnb()) == ',');
 891                         if (c != ')')
 892                                 qerr();
 893                 } else {
 894                         unget(c);
 895                 }
 896                 if ((ap = alookup(id)) != NULL) {
 897                         if (uaf && uf != ap->a_flag)
 898                                 err('m');
 899                 } else {
 900                         ap = (struct area *) new (sizeof(struct area));
 901                         ap->a_ap = areap;
 902                         strncpy(ap->a_id, id, NCPS);
 903                         ap->a_ref = areap->a_ref + 1;
 904                         ap->a_size = 0;
 905                         ap->a_fuzz = 0;
 906                         ap->a_flag = uaf ? uf : (A_CON|A_REL);
 907                         areap = ap;
 908                 }
 909                 newdot(ap);
 910                 lmode = SLIST;
 911                 break;
 912
 913         case S_ORG:
 914                 if (dot.s_area->a_flag & A_ABS) {
 915                         outall();
 916                         laddr = dot.s_addr = absexpr();
 917                 } else {
 918                         err('o');
 919                 }
 920                 outall();
 921                 lmode = ALIST;
 922                 break;
 923
 924         case S_RADIX:
 925                 if (more()) {
 926                         switch (getnb()) {
 927                         case 'b':
 928                         case 'B':
 929                                 radix = 2;
 930                                 break;
 931                         case '@':
 932                         case 'o':
 933                         case 'O':
 934                         case 'q':
 935                         case 'Q':
 936                                 radix = 8;
 937                                 break;
 938                         case 'd':
 939                         case 'D':
 940                                 radix = 10;
 941                                 break;
 942                         case 'h':
 943                         case 'H':
 944                         case 'x':
 945                         case 'X':
 946                                 radix = 16;
 947                                 break;
 948                         default:
 949                                 radix = 10;
 950                                 qerr();
 951                                 break;
 952                         }
 953                 } else {
 954                         radix = 10;
 955                 }
 956                 lmode = SLIST;
 957                 break;
 958
 959         case S_INCL:
 960                 d = getnb();
 961                 p = fn;
 962                 while ((c = get()) != d) {
 963                         if (p < &fn[FILSPC-1]) {
 964                                 *p++ = c;
 965                         } else {
 966                                 break;
 967                         }
 968                 }
 969                 *p = 0;
 970                 if (++incfil == MAXINC ||
 971                    (ifp[incfil] = fopen(fn, "r")) == NULL) {
 972                         --incfil;
 973                         err('i');
 974                 } else {
 975                         lop = NLPP;
 976                         incline[incfil] = 0;
 977                         strcpy(incfn[incfil],fn);
 978                 }
 979                 lmode = SLIST;
 980                 break;
 981
 982         /*
 983          * If not an assembler directive then go to
 984          * the machine dependent function which handles
 985          * all the assembler mnemonics.
 986          */
 987         default:
 988                 machine(mp);
 989         }
 990         goto loop;
 991 }
 992
 993 /*)Function     FILE *  afile(fn, ft, wf)
 994  *
 995  *              char *  fn              file specification string
 996  *              char *  ft              file type string
 997  *              int     wf              read(0)/write(1) flag
 998  *
 999  *      The function afile() opens a file for reading or writing.
1000  *              (1)     If the file type specification string ft
1001  *                      is not NULL then a file specification is
1002  *                      constructed with the file path\name in fn
1003  *                      and the extension in ft.
1004  *              (2)     If the file type specification string ft
1005  *                      is NULL then the file specification is
1006  *                      constructed from fn.  If fn does not have
1007  *                      a file type then the default source file
1008  *                      type dsft is appended to the file specification.
1009  *
1010  *      afile() returns a file handle for the opened file or aborts
1011  *      the assembler on an open error.
1012  *
1013  *      local variables:
1014  *              int     c               character value
1015  *              FILE *  fp              filehandle for opened file
1016  *              char *  p1              pointer to filespec string fn
1017  *              char *  p2              pointer to filespec string fb
1018  *              char *  p3              pointer to filetype string ft
1019  *
1020  *      global variables:
1021  *              char    afn[]           afile() constructed filespec
1022  *              char    dsft[]          default assembler file type string
1023  *              char    afn[]           constructed file specification string
1024  *
1025  *      functions called:
1026  *              VOID    asexit()        asmain.c
1027  *              FILE *  fopen()         c_library
1028  *              int     fprintf()       c_library
1029  *
1030  *      side effects:
1031  *              File is opened for read or write.
1032  */
1033
1034 FILE *
1035 afile(fn, ft, wf)
1036 char *fn;
1037 char *ft;
1038 int wf;
1039 {
1040         register char *p2, *p3;
1041         register int c;
1042         FILE *fp;
1043
1044         p2 = afn;
1045         p3 = ft;
1046
1047         strcpy (afn, fn);
1048         p2 = strrchr (afn, FSEPX);              // search last '.'
1049         if (!p2)
1050                 p2 = afn + strlen (afn);
1051         if (p2 > &afn[FILSPC-4])                // truncate filename, if it's too long
1052                 p2 = &afn[FILSPC-4];
1053         *p2++ = FSEPX;
1054
1055         // choose a file-extension
1056         if (*p3 == 0) {                                 // extension supplied?
1057                 p3 = strrchr (fn, FSEPX);       // no: extension in fn?
1058                 if (p3)
1059                         ++p3;
1060                 else
1061                         p3 = dsft;                                      // no: default extension
1062         }
1063
1064         while ((c = *p3++) != 0) {              // strncpy
1065                 if (p2 < &afn[FILSPC-1])
1066                         *p2++ = c;
1067         }
1068         *p2++ = 0;
1069
1070         if ((fp = fopen(afn, wf?"w":"r")) == NULL) {
1071                 fprintf(stderr, "%s: cannot %s.\n", afn, wf?"create":"open");
1072                 asexit(1);
1073         }
1074         return (fp);
1075 }
1076
1077 /*)Function     VOID    newdot(nap)
1078  *
1079  *              area *  nap             pointer to the new area structure
1080  *
1081  *      The function newdot():
1082  *              (1)     copies the current values of fuzz and the last
1083  *                      address into the current area referenced by dot
1084  *              (2)     loads dot with the pointer to the new area and
1085  *                      loads the fuzz and last address parameters
1086  *              (3)     outall() is called to flush any remaining
1087  *                      bufferred code from the old area to the output
1088  *
1089  *      local variables:
1090  *              area *  oap             pointer to old area
1091  *
1092  *      global variables:
1093  *              sym     dot             defined as sym[0]
1094  *              Addr_T  fuzz            tracks pass to pass changes in the
1095  *                                      address of symbols caused by
1096  *                                      variable length instruction formats
1097  *
1098  *      functions called:
1099  *              none
1100  *
1101  *      side effects:
1102  *              Current area saved, new area loaded, buffers flushed.
1103  */
1104
1105 VOID
1106 newdot(nap)
1107 register struct area *nap;
1108 {
1109         register struct area *oap;
1110
1111         oap = dot.s_area;
1112         oap->a_fuzz = fuzz;
1113         oap->a_size = dot.s_addr;
1114         fuzz = nap->a_fuzz;
1115         dot.s_area = nap;
1116         dot.s_addr = nap->a_size;
1117         outall();
1118 }
1119
1120 /*)Function     VOID    phase(ap, a)
1121  *
1122  *              area *  ap              pointer to area
1123  *              Addr_T  a               address in area
1124  *
1125  *      Function phase() compares the area ap and address a
1126  *      with the current area dot.s_area and address dot.s_addr
1127  *      to determine if the position of the symbol has changed
1128  *      between assembler passes.
1129  *
1130  *      local variables:
1131  *              none
1132  *
1133  *      global varaibles:
1134  *              sym *   dot             defined as sym[0]
1135  *
1136  *      functions called:
1137  *              none
1138  *
1139  *      side effects:
1140  *              The p error is invoked if the area and/or address
1141  *              has changed.
1142  */
1143
1144 VOID
1145 phase(ap, a)
1146 struct area *ap;
1147 Addr_T a;
1148 {
1149         if (ap != dot.s_area || a != dot.s_addr)
1150                 err('p');
1151 }
1152
1153 char *usetxt[] = {
1154 #ifdef SDK
1155         "Usage: [-dqxgalopsf] outfile file1 [file2 file3 ...]",
1156 #else /* SDK */
1157         "Usage: [-dqxgalopsf] file1 [file2 file3 ...]",
1158 #endif /* SDK */
1159         "  d    decimal listing",
1160         "  q    octal   listing",
1161         "  x    hex     listing (default)",
1162         "  g    undefined symbols made global",
1163         "  a    all user symbols made global",
1164 #ifdef SDK
1165         "  l    create list   output outfile[LST]",
1166         "  o    create object output outfile[o]",
1167         "  s    create symbol output outfile[SYM]",
1168 #else /* SDK */
1169         "  l    create list   output file1[LST]",
1170         "  o    create object output file1[REL]",
1171         "  s    create symbol output file1[SYM]",
1172 #endif /* SDK */
1173         "  p    disable listing pagination",
1174         "  f    flag relocatable references by  `   in listing file",
1175         " ff    flag relocatable references by mode in listing file",
1176         "",
1177         0
1178 };
1179
1180 /*)Function     VOID    usage()
1181  *
1182  *      The function usage() outputs to the stderr device the
1183  *      assembler name and version and a list of valid assembler options.
1184  *
1185  *      local variables:
1186  *              char ** dp              pointer to an array of
1187  *                                      text string pointers.
1188  *
1189  *      global variables:
1190  *              char    cpu[]           assembler type string
1191  *              char *  usetxt[]        array of string pointers
1192  *
1193  *      functions called:
1194  *              VOID    asexit()        asmain.c
1195  *              int     fprintf()       c_library
1196  *
1197  *      side effects:
1198  *              program is terminated
1199  */
1200
1201 VOID
1202 usage()
1203 {
1204         register char   **dp;
1205
1206         fprintf(stderr, "\nASxxxx Assembler %s  (%s)\n\n", VERSION, cpu);
1207         for (dp = usetxt; *dp; dp++)
1208                 fprintf(stderr, "%s\n", *dp);
1209         asexit(1);
1210 }