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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     as_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         /* Check to make sure there are the right number of filenames */
 164         /* before openning any of them */
 165 #ifdef SDK
 166         inpfil = -2;
 167 #else /* SDK */
 168         inpfil = -1;
 169 #endif /* SDK */
 170         for (i=1; i<argc; ++i) {
 171                 p = argv[i];
 172                 if (*p != '-')
 173                         inpfil++;
 174         }
 175         if (inpfil < 0)
 176                 usage();
 177
 178 #ifdef SDK
 179         inpfil = -2;
 180 #else /* SDK */
 181         fprintf(stdout, "\n");
 182         inpfil = -1;
 183 #endif /* SDK */
 184         pflag = 1;
 185         for (i=1; i<argc; ++i) {
 186                 p = argv[i];
 187                 if (*p == '-') {
 188                         if (inpfil >= 0)
 189                                 usage();
 190                         ++p;
 191                         while ((c = *p++) != 0)
 192                                 switch(c) {
 193
 194                                 case 'a':
 195                                 case 'A':
 196                                         ++aflag;
 197                                         break;
 198
 199                                 case 'g':
 200                                 case 'G':
 201                                         ++gflag;
 202                                         break;
 203
 204                                 case 'l':
 205                                 case 'L':
 206                                         ++lflag;
 207                                         break;
 208
 209                                 case 'o':
 210                                 case 'O':
 211                                         ++oflag;
 212                                         break;
 213
 214                                 case 's':
 215                                 case 'S':
 216                                         ++sflag;
 217                                         break;
 218
 219                                 case 'p':
 220                                 case 'P':
 221                                         pflag = 0;
 222                                         break;
 223
 224                                 case 'x':
 225                                 case 'X':
 226                                         xflag = 0;
 227                                         break;
 228
 229                                 case 'q':
 230                                 case 'Q':
 231                                         xflag = 1;
 232                                         break;
 233
 234                                 case 'd':
 235                                 case 'D':
 236                                         xflag = 2;
 237                                         break;
 238
 239                                 case 'f':
 240                                 case 'F':
 241                                         ++fflag;
 242                                         break;
 243
 244                                 default:
 245                                         usage();
 246                                 }
 247                 } else {
 248 #ifdef SDK
 249                         if(inpfil != -2) {
 250 #endif /* SDK */
 251                         if (++inpfil == MAXFIL) {
 252                                 fprintf(stderr, "too many input files\n");
 253                                 asexit(1);
 254                         }
 255                         sfp[inpfil] = afile(p, "", 0);
 256                         strcpy(srcfn[inpfil],afn);
 257 #ifdef SDK
 258                         } else
 259                                 inpfil++;
 260                         if (inpfil == -1) {
 261                                 if (lflag)
 262                                         lfp = afile(p, "lst", 1);
 263                                 if (oflag)
 264                                         ofp = afile(p, "", 1);
 265                                 if (sflag)
 266                                         tfp = afile(p, "sym", 1);
 267                         }
 268 #else /* SDK */
 269                         if (inpfil == 0) {
 270                                 if (lflag)
 271                                         lfp = afile(p, "LST", 1);
 272                                 if (oflag)
 273                                         ofp = afile(p, "REL", 1);
 274                                 if (sflag)
 275                                         tfp = afile(p, "SYM", 1);
 276                         }
 277 #endif /* SDK */
 278                 }
 279         }
 280         if (inpfil < 0)
 281                 usage();
 282         syminit();
 283         for (pass=0; pass<3; ++pass) {
 284                 if (gflag && pass == 1)
 285                         symglob();
 286                 if (aflag && pass == 1)
 287                         allglob();
 288                 if (oflag && pass == 2)
 289                         outgsd();
 290                 flevel = 0;
 291                 tlevel = 0;
 292                 ifcnd[0] = 0;
 293                 iflvl[0] = 0;
 294                 radix = 10;
 295                 srcline[0] = 0;
 296                 page = 0;
 297                 stb[0] = 0;
 298                 lop  = NLPP;
 299                 cfile = 0;
 300                 incfil = -1;
 301                 for (i = 0; i <= inpfil; i++)
 302                         rewind(sfp[i]);
 303                 ap = areap;
 304                 while (ap) {
 305                         ap->a_fuzz = 0;
 306                         ap->a_size = 0;
 307                         ap = ap->a_ap;
 308                 }
 309                 fuzz = 0;
 310                 dot.s_addr = 0;
 311                 dot.s_area = &dca;
 312                 symp = &dot;
 313                 minit();
 314                 while (as_getline()) {
 315                         cp = cb;
 316                         cpt = cbt;
 317                         ep = eb;
 318                         ip = ib;
 319                         if (setjmp(jump_env) == 0)
 320                                 asmbl();
 321                         if (pass == 2) {
 322                                 diag();
 323                                 list();
 324                         }
 325                 }
 326                 newdot(dot.s_area); /* Flush area info */
 327                 if (flevel || tlevel)
 328                         err('i');
 329         }
 330         if (oflag)
 331                 outchk(HUGE, HUGE);  /* Flush */
 332         if (sflag) {
 333                 lstsym(tfp);
 334         } else
 335         if (lflag) {
 336                 lstsym(lfp);
 337         }
 338         asexit(aserr != 0);
 339         /* Never reached */
 340         return 0;
 341 }
 342
 343 /*)Function     VOID    asexit(i)
 344  *
 345  *                      int     i       exit code
 346  *
 347  *      The function asexit() explicitly closes all open
 348  *      files and then terminates the program.
 349  *
 350  *      local variables:
 351  *              int     j               loop counter
 352  *
 353  *      global variables:
 354  *              FILE *  ifp[]           array of include-file file handles
 355  *              FILE *  lfp             list output file handle
 356  *              FILE *  ofp             relocation output file handle
 357  *              FILE *  tfp             symbol table output file handle
 358  *              FILE *  sfp[]           array of assembler-source file handles
 359  *
 360  *      functions called:
 361  *              int     fclose()        c-library
 362  *              VOID    exit()          c-library
 363  *
 364  *      side effects:
 365  *              All files closed. Program terminates.
 366  */
 367
 368 VOID
 369 asexit(int i)
 370 {
 371         int j;
 372
 373         if (lfp != NULL) fclose(lfp);
 374         if (ofp != NULL) fclose(ofp);
 375         if (tfp != NULL) fclose(tfp);
 376
 377         for (j=0; j<MAXFIL && sfp[j] != NULL; j++) {
 378                 fclose(sfp[j]);
 379         }
 380
 381         for (j=0; j<MAXINC && ifp[j] != NULL; j++) {
 382                 fclose(ifp[j]);
 383         }
 384
 385         exit(i);
 386 }
 387
 388 /*)Function     VOID    asmbl()
 389  *
 390  *      The function asmbl() scans the assembler-source text for
 391  *      (1) labels, global labels, equates, global equates, and local
 392  *      symbols, (2) .if, .else, .endif, and .page directives,
 393  *      (3) machine independent assembler directives, and (4) machine
 394  *      dependent mnemonics.
 395  *
 396  *      local variables:
 397  *              mne *   mp              pointer to a mne structure
 398  *              sym *   sp              pointer to a sym structure
 399  *              tsym *  tp              pointer to a tsym structure
 400  *              int     c               character from assembler-source
 401  *                                      text line
 402  *              area *  ap              pointer to an area structure
 403  *              expr    e1              expression structure
 404  *              char    id[]            id string
 405  *              char    opt[]           options string
 406  *              char    fn[]            filename string
 407  *              char *  p               pointer into a string
 408  *              int     d               temporary value
 409  *              int     n               temporary value
 410  *              int     uaf             user area options flag
 411  *              int     uf              area options
 412  *
 413  *      global variables:
 414  *              area *  areap           pointer to an area structure
 415  *              char    ctype[]         array of character types, one per
 416  *                                      ASCII character
 417  *              int     flevel          IF-ELSE-ENDIF flag will be non
 418  *                                      zero for false conditional case
 419  *              Addr_T  fuzz            tracks pass to pass changes in the
 420  *                                      address of symbols caused by
 421  *                                      variable length instruction formats
 422  *              int     ifcnd[]         array of IF statement condition
 423  *                                      values (0 = FALSE) indexed by tlevel
 424  *              int     iflvl[]         array of IF-ELSE-ENDIF flevel
 425  *                                      values indexed by tlevel
 426  *              FILE *  ifp[]           array of include-file file handles
 427  *              char    incfn[][]       array of include file names
 428  *              int     incline[]       current include file line
 429  *              int     incfil          current file handle index
 430  *                                      for include files
 431  *              Addr_T  laddr           address of current assembler line
 432  *                                      or value of .if argument
 433  *              int     lmode           listing mode
 434  *              int     lop             current line number on page
 435  *              char    module[]        module name string
 436  *              int     pass            assembler pass number
 437  *              int     radix           current number conversion radix:
 438  *                                      2 (binary), 8 (octal), 10 (decimal),
 439  *                                      16 (hexadecimal)
 440  *              char    stb[]           Subtitle string buffer
 441  *              sym *   symp            pointer to a symbol structure
 442  *              char    tb[]            Title string buffer
 443  *              int     tlevel          current conditional level
 444  *
 445  *      functions called:
 446  *              Addr_T  absexpr()       asexpr.c
 447  *              area *  alookup()       assym.c
 448  *              VOID    clrexpr()       asexpr.c
 449  *              int     digit()         asexpr.c
 450  *              char    endline()       aslex.c
 451  *              VOID    err()           assubr.c
 452  *              VOID    expr()          asexpr.c
 453  *              FILE *  fopen()         c-library
 454  *              char    get()           aslex.c
 455  *              VOID    getid()         aslex.c
 456  *              int     getmap()        aslex.c
 457  *              char    getnb()         aslex.c
 458  *              VOID    getst()         aslex.c
 459  *              sym *   lookup()        assym.c
 460  *              VOID    machine()       ___mch.c
 461  *              mne *   mlookup()       assym.c
 462  *              int     more()          aslex.c
 463  *              VOID *  new()           assym.c
 464  *              VOID    newdot()        asmain.c
 465  *              VOID    outall()        asout.c
 466  *              VOID    outab()         asout.c
 467  *              VOID    outchk()        asout.c
 468  *              VOID    outrb()         asout.c
 469  *              VOID    outrw()         asout.c
 470  *              VOID    phase()         asmain.c
 471  *              VOID    qerr()          assubr.c
 472  *              char *  strcpy()        c-library
 473  *              char *  strncpy()       c-library
 474  *              VOID    unget()         aslex.c
 475  */
 476
 477 VOID
 478 asmbl(void)
 479 {
 480         register struct mne *mp;
 481         register struct sym *sp;
 482         register struct tsym *tp;
 483         register int c;
 484         struct area  *ap;
 485         struct expr e1;
 486         char id[NCPS];
 487         char opt[NCPS];
 488         char fn[FILSPC];
 489         char *p;
 490         int d, n, uaf, uf;
 491
 492 #ifdef SDK
 493         double f1, f2;
 494         unsigned int mantissa, exponent;
 495         const char readbuffer[80];
 496 #endif
 497         laddr = dot.s_addr;
 498         lmode = SLIST;
 499 loop:
 500         if ((c=endline()) == 0) { return; }
 501         /*
 502          * If the first character is a digit then assume
 503          * a local symbol is being specified.  The symbol
 504          * must end with $: to be valid.
 505          *      pass 0:
 506          *              Construct a tsym structure at the first
 507          *              occurance of the symbol.  Flag the symbol
 508          *              as multiply defined if not the first occurance.
 509          *      pass 1:
 510          *              Load area, address, and fuzz values
 511          *              into structure tsym.
 512          *      pass 2:
 513          *              Check for assembler phase error and
 514          *              multiply defined error.
 515          */
 516         if (ctype[c] & DIGIT) {
 517                 if (flevel)
 518                         return;
 519                 n = 0;
 520                 while ((d = digit(c, 10)) >= 0) {
 521                         n = 10*n + d;
 522                         c = get();
 523                 }
 524                 if (c != '$' || get() != ':')
 525                         qerr();
 526                 tp = symp->s_tsym;
 527                 if (pass == 0) {
 528                         while (tp) {
 529                                 if (n == tp->t_num) {
 530                                         tp->t_flg |= S_MDF;
 531                                         break;
 532                                 }
 533                                 tp = tp->t_lnk;
 534                         }
 535                         if (tp == NULL) {
 536                                 tp=(struct tsym *) new (sizeof(struct tsym));
 537                                 tp->t_lnk = symp->s_tsym;
 538                                 tp->t_num = n;
 539                                 tp->t_flg = 0;
 540                                 tp->t_area = dot.s_area;
 541                                 tp->t_addr = dot.s_addr;
 542                                 symp->s_tsym = tp;
 543                         }
 544                 } else {
 545                         while (tp) {
 546                                 if (n == tp->t_num) {
 547                                         break;
 548                                 }
 549                                 tp = tp->t_lnk;
 550                         }
 551                         if (tp) {
 552                                 if (pass == 1) {
 553                                         fuzz = tp->t_addr - dot.s_addr;
 554                                         tp->t_area = dot.s_area;
 555                                         tp->t_addr = dot.s_addr;
 556                                 } else {
 557                                         phase(tp->t_area, tp->t_addr);
 558                                         if (tp->t_flg & S_MDF)
 559                                                 err('m');
 560                                 }
 561                         } else {
 562                                 err('u');
 563                         }
 564                 }
 565                 lmode = ALIST;
 566                 goto loop;
 567         }
 568         /*
 569          * If the first character is a letter then assume a label,
 570          * symbol, assembler directive, or assembler mnemonic is
 571          * being processed.
 572          */
 573         if ((ctype[c] & LETTER) == 0) {
 574                 if (flevel) {
 575                         return;
 576                 } else {
 577                         qerr();
 578                 }
 579         }
 580         getid(id, c);
 581         c = getnb();
 582         /*
 583          * If the next character is a : then a label is being processed.
 584          * A double :: defines a global label.  If this is new label
 585          * then create a symbol structure.
 586          *      pass 0:
 587          *              Flag multiply defined labels.
 588          *      pass 1:
 589          *              Load area, address, and fuzz values
 590          *              into structure symp.
 591          *      pass 2:
 592          *              Check for assembler phase error and
 593          *              multiply defined error.
 594          */
 595         if (c == ':') {
 596                 if (flevel)
 597                         return;
 598                 if ((c = get()) != ':') {
 599                         unget(c);
 600                         c = 0;
 601                 }
 602                 symp = lookup(id);
 603                 if (symp == &dot)
 604                         err('.');
 605                 if (pass == 0)
 606                         if ((symp->s_type != S_NEW) &&
 607                            ((symp->s_flag & S_ASG) == 0))
 608                                 symp->s_flag |= S_MDF;
 609                 if (pass != 2) {
 610                         fuzz = symp->s_addr - dot.s_addr;
 611                         symp->s_type = S_USER;
 612                         symp->s_area = dot.s_area;
 613                         symp->s_addr = dot.s_addr;
 614                 } else {
 615                         if (symp->s_flag & S_MDF)
 616                                 err('m');
 617                         phase(symp->s_area, symp->s_addr);
 618                 }
 619                 if (c) {
 620                         symp->s_flag |= S_GBL;
 621                 }
 622                 lmode = ALIST;
 623                 goto loop;
 624         }
 625         /*
 626          * If the next character is a = then an equate is being processed.
 627          * A double == defines a global equate.  If this is new variable
 628          * then create a symbol structure.
 629          */
 630         if (c == '=') {
 631                 if (flevel)
 632                         return;
 633                 if ((c = get()) != '=') {
 634                         unget(c);
 635                         c = 0;
 636                 }
 637                 clrexpr(&e1);
 638                 expr(&e1, 0);
 639                 sp = lookup(id);
 640                 if (sp == &dot) {
 641                         outall();
 642                         if (e1.e_flag || e1.e_base.e_ap != dot.s_area)
 643                                 err('.');
 644                 } else
 645                 if (sp->s_type != S_NEW && (sp->s_flag & S_ASG) == 0) {
 646                         err('m');
 647                 }
 648                 sp->s_type = S_USER;
 649                 sp->s_area = e1.e_base.e_ap;
 650                 sp->s_addr = laddr = e1.e_addr;
 651                 sp->s_flag |= S_ASG;
 652                 if (c) {
 653                         sp->s_flag |= S_GBL;
 654                 }
 655                 lmode = ELIST;
 656                 goto loop;
 657         }
 658         unget(c);
 659         lmode = flevel ? SLIST : CLIST;
 660         if ((mp = mlookup(id)) == NULL) {
 661                 if (!flevel)
 662                         err('o');
 663                 return;
 664         }
 665         /*
 666          * If we have gotten this far then we have found an
 667          * assembler directive or an assembler mnemonic.
 668          *
 669          * Check for .if, .else, .endif, and .page directives
 670          * which are not controlled by the conditional flags
 671          */
 672         switch (mp->m_type) {
 673
 674         case S_IF:
 675                 n = absexpr();
 676                 if (tlevel < MAXIF) {
 677                         ++tlevel;
 678                         ifcnd[tlevel] = n;
 679                         iflvl[tlevel] = flevel;
 680                         if (n == 0) {
 681                                 ++flevel;
 682                         }
 683                 } else {
 684                         err('i');
 685                 }
 686                 lmode = ELIST;
 687                 laddr = n;
 688                 return;
 689
 690         case S_ELSE:
 691                 if (ifcnd[tlevel]) {
 692                         if (++flevel > (iflvl[tlevel]+1)) {
 693                                 err('i');
 694                         }
 695                 } else {
 696                         if (--flevel < iflvl[tlevel]) {
 697                                 err('i');
 698                         }
 699                 }
 700                 lmode = SLIST;
 701                 return;
 702
 703         case S_ENDIF:
 704                 if (tlevel) {
 705                         flevel = iflvl[tlevel--];
 706                 } else {
 707                         err('i');
 708                 }
 709                 lmode = SLIST;
 710                 return;
 711
 712         case S_PAGE:
 713                 lop = NLPP;
 714                 lmode = NLIST;
 715                 return;
 716
 717         default:
 718                 break;
 719         }
 720         if (flevel)
 721                 return;
 722         /*
 723          * If we are not in a false state for .if/.else then
 724          * process the assembler directives here.
 725          */
 726         switch (mp->m_type) {
 727
 728         case S_EVEN:
 729                 outall();
 730                 laddr = dot.s_addr = (dot.s_addr + 1) & ~1;
 731                 lmode = ALIST;
 732                 break;
 733
 734         case S_ODD:
 735                 outall();
 736                 laddr = dot.s_addr |= 1;
 737                 lmode = ALIST;
 738                 break;
 739
 740         case S_BYTE:
 741         case S_WORD:
 742                 do {
 743                         clrexpr(&e1);
 744                         expr(&e1, 0);
 745                         if (mp->m_type == S_BYTE) {
 746                                 outrb(&e1, R_NORM);
 747                         } else {
 748                                 outrw(&e1, R_NORM);
 749                         }
 750                 } while ((c = getnb()) == ',');
 751                 unget(c);
 752                 break;
 753
 754 #ifdef SDK
 755         case S_FLOAT:
 756                 do {
 757                         getid( readbuffer, ' ' ); /* Hack :) */
 758                         if ((c=getnb())=='.')
 759                           {
 760                                   getid(&readbuffer[strlen(readbuffer)],'.');
 761                           }
 762                         else
 763                             unget(c);
 764
 765                         f1 = strtod( readbuffer, (char **)NULL );
 766                         /* Convert f1 to a gb-lib type fp
 767                          * 24 bit mantissa followed by 7 bit exp and 1 bit sign
 768                         */
 769
 770                         if (f1!=0)
 771                           {
 772
 773                                   f2 = floor(log(fabs(f1))/log(2))+1;
 774                                   mantissa = (unsigned int) ((0x1000000*fabs(f1))/exp(f2*log(2))) ;
 775                                   mantissa &=0xffffff;
 776                                   exponent = (unsigned int) (f2 + 0x40) ;
 777                                   if (f1<0)
 778                                       exponent |=0x80;
 779                           }
 780
 781                         else
 782                           {
 783                                   mantissa=0;
 784                                   exponent=0;
 785                           }
 786
 787                         outab(mantissa&0xff);
 788                         outab((mantissa>>8)&0xff);
 789                         outab((mantissa>>16)&0xff);
 790                         outab(exponent&0xff);
 791
 792                 } while ((c = getnb()) == ',');
 793                 unget(c);
 794                 break;
 795 #endif
 796
 797         case S_ASCII:
 798         case S_ASCIZ:
 799                 if ((d = getnb()) == '\0')
 800                         qerr();
 801                 while ((c = getmap(d)) >= 0)
 802                         outab(c);
 803                 if (mp->m_type == S_ASCIZ)
 804                         outab(0);
 805                 break;
 806
 807         case S_ASCIS:
 808                 if ((d = getnb()) == '\0')
 809                         qerr();
 810                 c = getmap(d);
 811                 while (c >= 0) {
 812                         if ((n = getmap(d)) >= 0) {
 813                                 outab(c);
 814                         } else {
 815                                 outab(c | 0x80);
 816                         }
 817                         c = n;
 818                 }
 819                 break;
 820
 821         case S_BLK:
 822                 clrexpr(&e1);
 823                 expr(&e1, 0);
 824                 dot.s_addr += e1.e_addr*mp->m_valu;
 825                 outchk(HUGE,HUGE);
 826                 lmode = BLIST;
 827                 break;
 828
 829         case S_TITLE:
 830                 p = tb;
 831                 if ((c = getnb()) != 0) {
 832                         do {
 833                                 if (p < &tb[NTITL-1])
 834                                         *p++ = c;
 835                         } while ((c = get()) != 0);
 836                 }
 837                 *p = 0;
 838                 unget(c);
 839                 lmode = SLIST;
 840                 break;
 841
 842         case S_SBTL:
 843                 p = stb;
 844                 if ((c = getnb()) != 0) {
 845                         do {
 846                                 if (p < &stb[NSBTL-1])
 847                                         *p++ = c;
 848                         } while ((c = get()) != 0);
 849                 }
 850                 *p = 0;
 851                 unget(c);
 852                 lmode = SLIST;
 853                 break;
 854
 855         case S_MODUL:
 856                 getst(id, getnb()); // a module can start with a digit
 857                 if (pass == 0) {
 858                         if (module[0]) {
 859                                 err('m');
 860                         } else {
 861                                 strncpy(module, id, NCPS);
 862                         }
 863                 }
 864                 lmode = SLIST;
 865                 break;
 866
 867     case S_OPTSDCC:
 868                 p = optsdcc;
 869                 if ((c = getnb()) != 0) {
 870                         do {
 871                                 if (p < &optsdcc[NINPUT-1])
 872                                         *p++ = c;
 873                         } while ((c = get()) != 0);
 874                 }
 875                 *p = 0;
 876                 unget(c);
 877                 lmode = SLIST;
 878         break;
 879
 880         case S_GLOBL:
 881                 do {
 882                         getid(id, -1);
 883                         sp = lookup(id);
 884                         sp->s_flag |= S_GBL;
 885                 } while ((c = getnb()) == ',');
 886                 unget(c);
 887                 lmode = SLIST;
 888                 break;
 889
 890         case S_DAREA:
 891                 getid(id, -1);
 892                 uaf = 0;
 893                 uf  = A_CON|A_REL;
 894                 if ((c = getnb()) == '(') {
 895                         do {
 896                                 getid(opt, -1);
 897                                 mp = mlookup(opt);
 898                                 if (mp && mp->m_type == S_ATYP) {
 899                                         ++uaf;
 900                                         uf |= mp->m_valu;
 901                                 } else {
 902                                         err('u');
 903                                 }
 904                         } while ((c = getnb()) == ',');
 905                         if (c != ')')
 906                                 qerr();
 907                 } else {
 908                         unget(c);
 909                 }
 910                 if ((ap = alookup(id)) != NULL) {
 911                         if (uaf && uf != ap->a_flag)
 912                                 err('m');
 913                 } else {
 914                         ap = (struct area *) new (sizeof(struct area));
 915                         ap->a_ap = areap;
 916                         ap->a_id = strsto(id);
 917                         ap->a_ref = areap->a_ref + 1;
 918                         ap->a_size = 0;
 919                         ap->a_fuzz = 0;
 920                         ap->a_flag = uaf ? uf : (A_CON|A_REL);
 921                         areap = ap;
 922                 }
 923                 newdot(ap);
 924                 lmode = SLIST;
 925                 break;
 926
 927         case S_ORG:
 928                 if (dot.s_area->a_flag & A_ABS) {
 929                         outall();
 930                         laddr = dot.s_addr = absexpr();
 931                 } else {
 932                         err('o');
 933                 }
 934                 outall();
 935                 lmode = ALIST;
 936                 break;
 937
 938         case S_RADIX:
 939                 if (more()) {
 940                         switch (getnb()) {
 941                         case 'b':
 942                         case 'B':
 943                                 radix = 2;
 944                                 break;
 945                         case '@':
 946                         case 'o':
 947                         case 'O':
 948                         case 'q':
 949                         case 'Q':
 950                                 radix = 8;
 951                                 break;
 952                         case 'd':
 953                         case 'D':
 954                                 radix = 10;
 955                                 break;
 956                         case 'h':
 957                         case 'H':
 958                         case 'x':
 959                         case 'X':
 960                                 radix = 16;
 961                                 break;
 962                         default:
 963                                 radix = 10;
 964                                 qerr();
 965                                 break;
 966                         }
 967                 } else {
 968                         radix = 10;
 969                 }
 970                 lmode = SLIST;
 971                 break;
 972
 973         case S_INCL:
 974                 d = getnb();
 975                 p = fn;
 976                 while ((c = get()) != d) {
 977                         if (p < &fn[FILSPC-1]) {
 978                                 *p++ = c;
 979                         } else {
 980                                 break;
 981                         }
 982                 }
 983                 *p = 0;
 984                 if (++incfil == MAXINC ||
 985                    (ifp[incfil] = fopen(fn, "r")) == NULL) {
 986                         --incfil;
 987                         err('i');
 988                 } else {
 989                         lop = NLPP;
 990                         incline[incfil] = 0;
 991                         strcpy(incfn[incfil],fn);
 992                 }
 993                 lmode = SLIST;
 994                 break;
 995
 996         /*
 997          * If not an assembler directive then go to
 998          * the machine dependent function which handles
 999          * all the assembler mnemonics.
1000          */
1001         default:
1002                 machine(mp);
1003         }
1004         goto loop;
1005 }
1006
1007 /*)Function     FILE *  afile(fn, ft, wf)
1008  *
1009  *              char *  fn              file specification string
1010  *              char *  ft              file type string
1011  *              int     wf              read(0)/write(1) flag
1012  *
1013  *      The function afile() opens a file for reading or writing.
1014  *              (1)     If the file type specification string ft
1015  *                      is not NULL then a file specification is
1016  *                      constructed with the file path\name in fn
1017  *                      and the extension in ft.
1018  *              (2)     If the file type specification string ft
1019  *                      is NULL then the file specification is
1020  *                      constructed from fn.  If fn does not have
1021  *                      a file type then the default source file
1022  *                      type dsft is appended to the file specification.
1023  *
1024  *      afile() returns a file handle for the opened file or aborts
1025  *      the assembler on an open error.
1026  *
1027  *      local variables:
1028  *              int     c               character value
1029  *              FILE *  fp              filehandle for opened file
1030  *              char *  p1              pointer to filespec string fn
1031  *              char *  p2              pointer to filespec string fb
1032  *              char *  p3              pointer to filetype string ft
1033  *
1034  *      global variables:
1035  *              char    afn[]           afile() constructed filespec
1036  *              char    dsft[]          default assembler file type string
1037  *              char    afn[]           constructed file specification string
1038  *
1039  *      functions called:
1040  *              VOID    asexit()        asmain.c
1041  *              FILE *  fopen()         c_library
1042  *              int     fprintf()       c_library
1043  *
1044  *      side effects:
1045  *              File is opened for read or write.
1046  */
1047
1048 FILE *
1049 afile(char *fn, char *ft, int wf)
1050 {
1051         register char *p2, *p3;
1052         register int c;
1053         FILE *fp;
1054
1055         p2 = afn;
1056         p3 = ft;
1057
1058         strcpy (afn, fn);
1059         p2 = strrchr (afn, FSEPX);              // search last '.'
1060         if (!p2)
1061                 p2 = afn + strlen (afn);
1062         if (p2 > &afn[FILSPC-4])                // truncate filename, if it's too long
1063                 p2 = &afn[FILSPC-4];
1064         *p2++ = FSEPX;
1065
1066         // choose a file-extension
1067         if (*p3 == 0) {                                 // extension supplied?
1068                 p3 = strrchr (fn, FSEPX);       // no: extension in fn?
1069                 if (p3)
1070                         ++p3;
1071                 else
1072                         p3 = dsft;                                      // no: default extension
1073         }
1074
1075         while ((c = *p3++) != 0) {              // strncpy
1076                 if (p2 < &afn[FILSPC-1])
1077                         *p2++ = c;
1078         }
1079         *p2++ = 0;
1080
1081         if ((fp = fopen(afn, wf?"w":"r")) == NULL) {
1082                 fprintf(stderr, "%s: cannot %s.\n", afn, wf?"create":"open");
1083                 asexit(1);
1084         }
1085         return (fp);
1086 }
1087
1088 /*)Function     VOID    newdot(nap)
1089  *
1090  *              area *  nap             pointer to the new area structure
1091  *
1092  *      The function newdot():
1093  *              (1)     copies the current values of fuzz and the last
1094  *                      address into the current area referenced by dot
1095  *              (2)     loads dot with the pointer to the new area and
1096  *                      loads the fuzz and last address parameters
1097  *              (3)     outall() is called to flush any remaining
1098  *                      bufferred code from the old area to the output
1099  *
1100  *      local variables:
1101  *              area *  oap             pointer to old area
1102  *
1103  *      global variables:
1104  *              sym     dot             defined as sym[0]
1105  *              Addr_T  fuzz            tracks pass to pass changes in the
1106  *                                      address of symbols caused by
1107  *                                      variable length instruction formats
1108  *
1109  *      functions called:
1110  *              none
1111  *
1112  *      side effects:
1113  *              Current area saved, new area loaded, buffers flushed.
1114  */
1115
1116 VOID
1117 newdot(struct area *nap)
1118 {
1119         register struct area *oap;
1120
1121         oap = dot.s_area;
1122         oap->a_fuzz = fuzz;
1123         oap->a_size = dot.s_addr;
1124         fuzz = nap->a_fuzz;
1125         dot.s_area = nap;
1126         dot.s_addr = nap->a_size;
1127         outall();
1128 }
1129
1130 /*)Function     VOID    phase(ap, a)
1131  *
1132  *              area *  ap              pointer to area
1133  *              Addr_T  a               address in area
1134  *
1135  *      Function phase() compares the area ap and address a
1136  *      with the current area dot.s_area and address dot.s_addr
1137  *      to determine if the position of the symbol has changed
1138  *      between assembler passes.
1139  *
1140  *      local variables:
1141  *              none
1142  *
1143  *      global varaibles:
1144  *              sym *   dot             defined as sym[0]
1145  *
1146  *      functions called:
1147  *              none
1148  *
1149  *      side effects:
1150  *              The p error is invoked if the area and/or address
1151  *              has changed.
1152  */
1153
1154 VOID
1155 phase(struct area *ap, Addr_T a)
1156 {
1157         if (ap != dot.s_area || a != dot.s_addr)
1158                 err('p');
1159 }
1160
1161 char *usetxt[] = {
1162 #ifdef SDK
1163         "Usage: [-dqxgalopsf] outfile file1 [file2 file3 ...]",
1164 #else /* SDK */
1165         "Usage: [-dqxgalopsf] file1 [file2 file3 ...]",
1166 #endif /* SDK */
1167         "  d    decimal listing",
1168         "  q    octal   listing",
1169         "  x    hex     listing (default)",
1170         "  g    undefined symbols made global",
1171         "  a    all user symbols made global",
1172 #ifdef SDK
1173         "  l    create list   output outfile[LST]",
1174         "  o    create object output outfile[o]",
1175         "  s    create symbol output outfile[SYM]",
1176 #else /* SDK */
1177         "  l    create list   output file1[LST]",
1178         "  o    create object output file1[REL]",
1179         "  s    create symbol output file1[SYM]",
1180 #endif /* SDK */
1181         "  p    disable listing pagination",
1182         "  f    flag relocatable references by  `   in listing file",
1183         " ff    flag relocatable references by mode in listing file",
1184         "",
1185         0
1186 };
1187
1188 /*)Function     VOID    usage()
1189  *
1190  *      The function usage() outputs to the stderr device the
1191  *      assembler name and version and a list of valid assembler options.
1192  *
1193  *      local variables:
1194  *              char ** dp              pointer to an array of
1195  *                                      text string pointers.
1196  *
1197  *      global variables:
1198  *              char    cpu[]           assembler type string
1199  *              char *  usetxt[]        array of string pointers
1200  *
1201  *      functions called:
1202  *              VOID    asexit()        asmain.c
1203  *              int     fprintf()       c_library
1204  *
1205  *      side effects:
1206  *              program is terminated
1207  */
1208
1209 VOID
1210 usage(void)
1211 {
1212         register char   **dp;
1213
1214         fprintf(stderr, "\nASxxxx Assembler %s  (%s)\n\n", VERSION, cpu);
1215         for (dp = usetxt; *dp; dp++)
1216                 fprintf(stderr, "%s\n", *dp);
1217         asexit(1);
1218 }