Shamusworld >> Repos - rmac/blob - token.c

   1 //
   2 // RMAC - Reboot's Macro Assembler for the Atari Jaguar Console System
   3 // TOKEN.C - Token Handling
   4 // Copyright (C) 199x Landon Dyer, 2011-2012 Reboot and Friends
   5 // RMAC derived from MADMAC v1.07 Written by Landon Dyer, 1986
   6 // Source Utilised with the Kind Permission of Landon Dyer
   7 //
   8
   9 #include "token.h"
  10 #include "error.h"
  11 #include "macro.h"
  12 #include "procln.h"
  13 #include "symbol.h"
  14
  15 #define DECL_KW                         // Declare keyword arrays
  16 #define DEF_KW                          // Declare keyword values
  17 #include "kwtab.h"                      // Incl generated keyword tables & defs
  18
  19
  20 int lnsave;                                     // 1; strcpy() text of current line
  21 int curlineno;                          // Current line number
  22 int totlines;                           // Total # of lines
  23 int mjump_align = 0;            // mjump alignment flag
  24 char lntag;                                     // Line tag
  25 char * curfname;                        // Current filename
  26 char tolowertab[128];           // Uppercase ==> lowercase
  27 char hextab[128];                       // Table of hex values
  28 char dotxtab[128];                      // Table for ".b", ".s", etc.
  29 char irbuf[LNSIZ];                      // Text for .rept block line
  30 char lnbuf[LNSIZ];                      // Text of current line
  31 WORD filecount;                         // Unique file number counter
  32 WORD cfileno;                           // Current file number
  33 TOKEN * tok;                            // Ptr to current token
  34 TOKEN * etok;                           // Ptr past last token in tokbuf[]
  35 TOKEN tokeol[1] = {EOL};        // Bailout end-of-line token
  36 char * string[TOKBUFSIZE*2];    // Token buffer string pointer storage
  37
  38 // File record, used to maintain a list of every include file ever visited
  39 #define FILEREC struct _filerec
  40 FILEREC
  41 {
  42    FILEREC * frec_next;
  43    char * frec_name;
  44 };
  45
  46 FILEREC * filerec;
  47 FILEREC * last_fr;
  48
  49 INOBJ * cur_inobj;                                              // Ptr current input obj (IFILE/IMACRO)
  50 static INOBJ * f_inobj;                                 // Ptr list of free INOBJs
  51 static IFILE * f_ifile;                                 // Ptr list of free IFILEs
  52 static IMACRO * f_imacro;                               // Ptr list of free IMACROs
  53
  54 static TOKEN tokbuf[TOKBUFSIZE];                // Token buffer (stack-like, all files)
  55
  56 char chrtab[] = {
  57         ILLEG, ILLEG, ILLEG, ILLEG,                     // NUL SOH STX ETX
  58         ILLEG, ILLEG, ILLEG, ILLEG,                     // EOT ENQ ACK BEL
  59         ILLEG, WHITE, ILLEG, ILLEG,                     // BS HT LF VT
  60         WHITE, ILLEG, ILLEG, ILLEG,                     // FF CR SO SI
  61
  62         ILLEG, ILLEG, ILLEG, ILLEG,                     // DLE DC1 DC2 DC3
  63         ILLEG, ILLEG, ILLEG, ILLEG,                     // DC4 NAK SYN ETB
  64         ILLEG, ILLEG, ILLEG, ILLEG,                     // CAN EM SUB ESC
  65         ILLEG, ILLEG, ILLEG, ILLEG,                     // FS GS RS US
  66
  67         WHITE, MULTX, MULTX, SELF,                      // SP ! " #
  68         MULTX+CTSYM, MULTX, SELF, MULTX,        // $ % & '
  69         SELF, SELF, SELF, SELF,                         // ( ) * +
  70         SELF, SELF, STSYM, SELF,                        // , - . /
  71
  72         DIGIT+HDIGIT+CTSYM, DIGIT+HDIGIT+CTSYM,         // 0 1
  73         DIGIT+HDIGIT+CTSYM, DIGIT+HDIGIT+CTSYM,         // 2 3
  74         DIGIT+HDIGIT+CTSYM, DIGIT+HDIGIT+CTSYM,         // 4 5
  75         DIGIT+HDIGIT+CTSYM, DIGIT+HDIGIT+CTSYM,         // 6 7
  76         DIGIT+HDIGIT+CTSYM, DIGIT+HDIGIT+CTSYM,         // 8 9
  77         MULTX, MULTX,                                                           // : ;
  78         MULTX, MULTX, MULTX, STSYM+CTSYM,                       // < = > ?
  79
  80         MULTX, STSYM+CTSYM+HDIGIT,                                                                      // @ A
  81         (char)((BYTE)DOT)+STSYM+CTSYM+HDIGIT, STSYM+CTSYM+HDIGIT,       // B C
  82         STSYM+CTSYM+HDIGIT, STSYM+CTSYM+HDIGIT,                                         // D E
  83         STSYM+CTSYM+HDIGIT, STSYM+CTSYM,                                                        // F G
  84         STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM,                     // H I J K
  85         (char)((BYTE)DOT)+STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM,   // L M N O
  86
  87         STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, (char)((BYTE)DOT)+STSYM+CTSYM,   // P Q R S
  88         STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, (char)((BYTE)DOT)+STSYM+CTSYM,   // T U V W
  89         STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, SELF,                            // X Y Z [
  90         SELF, SELF, MULTX, STSYM+CTSYM,                                                         // \ ] ^ _
  91
  92         ILLEG, STSYM+CTSYM+HDIGIT,                                                                      // ` a
  93         (char)((BYTE)DOT)+STSYM+CTSYM+HDIGIT, STSYM+CTSYM+HDIGIT,       // b c
  94         STSYM+CTSYM+HDIGIT, STSYM+CTSYM+HDIGIT,                                         // d e
  95         STSYM+CTSYM+HDIGIT, STSYM+CTSYM,                                                        // f g
  96         STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM,                     // h i j k
  97         (char)((BYTE)DOT)+STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM,   // l m n o
  98
  99         STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, (char)((BYTE)DOT)+STSYM+CTSYM,   // p q r s
 100         STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, (char)((BYTE)DOT)+STSYM+CTSYM,   // t u v w
 101         STSYM+CTSYM, STSYM+CTSYM, STSYM+CTSYM, SELF,                            // x y z {
 102         SELF, SELF, SELF, ILLEG                                                                         // | } ~ DEL
 103 };
 104
 105 // Names of registers
 106 static char * regname[] = {
 107         "d0", "d1",  "d2",  "d3", "d4", "d5", "d6", "d7",
 108         "a0", "a1",  "a2",  "a3", "a4", "a5", "a6", "a7",
 109         "pc", "ssp", "usp", "sr", "ccr"
 110 };
 111
 112 static char * riscregname[] = {
 113          "r0",  "r1",  "r2",  "r3",  "r4", "r5",   "r6",  "r7",
 114          "r8",  "r9", "r10", "r11", "r12", "r13", "r14", "r15",
 115         "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
 116         "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
 117 };
 118
 119
 120 //
 121 // Initialize Tokenizer
 122 //
 123 void InitTokenizer(void)
 124 {
 125         int i;                                                                  // Iterator
 126         char * htab = "0123456789abcdefABCDEF"; // Hex character table
 127
 128         lnsave = 0;                                                             // Don't save lines
 129         curfname = "";                                                  // No file, empty filename
 130         filecount = (WORD)-1;
 131         cfileno = (WORD)-1;                                             // cfileno gets bumped to 0
 132         curlineno = 0;
 133         totlines = 0;
 134         etok = tokbuf;
 135         f_inobj = NULL;
 136         f_ifile = NULL;
 137         f_imacro = NULL;
 138         cur_inobj = NULL;
 139         filerec = NULL;
 140         last_fr = NULL;
 141         lntag = SPACE;
 142
 143         // Initialize hex, "dot" and tolower tables
 144         for(i=0; i<128; i++)
 145         {
 146                 hextab[i] = -1;
 147                 dotxtab[i] = 0;
 148                 tolowertab[i] = (char)i;
 149         }
 150
 151         for(i=0; htab[i]!=EOS; i++)
 152                 hextab[htab[i]] = (char)((i < 16) ? i : i - 6);
 153
 154         for(i='A'; i<='Z'; i++)
 155                 tolowertab[i] |= 0x20;
 156
 157         // These characters are legal immediately after a period
 158         dotxtab['b'] = DOTB;                                    // .b .B .s .S
 159         dotxtab['B'] = DOTB;
 160         dotxtab['s'] = DOTB;
 161         dotxtab['S'] = DOTB;
 162         dotxtab['w'] = DOTW;                                    // .w .W
 163         dotxtab['W'] = DOTW;
 164         dotxtab['l'] = DOTL;                                    // .l .L
 165         dotxtab['L'] = DOTL;
 166         dotxtab['i'] = DOTI;                                    // .i .I (???)
 167         dotxtab['I'] = DOTI;
 168 }
 169
 170
 171 void SetFilenameForErrorReporting(void)
 172 {
 173         WORD fnum = cfileno;
 174
 175         // Check for absolute top filename (this should never happen)
 176         if (fnum == -1)
 177         {
 178                 curfname = "(*top*)";
 179                 return;
 180         }
 181
 182         FILEREC * fr = filerec;
 183
 184         // Advance to the correct record...
 185         while (fr != NULL && fnum != 0)
 186         {
 187                 fr = fr->frec_next;
 188                 fnum--;
 189         }
 190
 191         // Check for file # record not found (this should never happen either)
 192         if (fr == NULL)
 193         {
 194                 curfname = "(*NOT FOUND*)";
 195                 return;
 196         }
 197
 198         curfname = fr->frec_name;
 199 }
 200
 201
 202 //
 203 // Allocate an IFILE or IMACRO
 204 //
 205 INOBJ * a_inobj(int typ)
 206 {
 207         INOBJ * inobj;
 208         IFILE * ifile;
 209         IMACRO * imacro;
 210
 211         // Allocate and initialize INOBJ first
 212         if (f_inobj == NULL)
 213                 inobj = malloc(sizeof(INOBJ));
 214         else
 215         {
 216                 inobj = f_inobj;
 217                 f_inobj = f_inobj->in_link;
 218         }
 219
 220         switch (typ)
 221         {
 222         case SRC_IFILE:                                                 // Alloc and init an IFILE
 223                 if (f_ifile == NULL)
 224                         ifile = malloc(sizeof(IFILE));
 225                 else
 226                 {
 227                         ifile = f_ifile;
 228                         f_ifile = f_ifile->if_link;
 229                 }
 230
 231                 inobj->inobj.ifile = ifile;
 232                 break;
 233         case SRC_IMACRO:                                                // Alloc and init an IMACRO
 234                 if (f_imacro == NULL)
 235                         imacro = malloc(sizeof(IMACRO));
 236                 else
 237                 {
 238                         imacro = f_imacro;
 239                         f_imacro = f_imacro->im_link;
 240                 }
 241
 242                 inobj->inobj.imacro = imacro;
 243                 break;
 244         case SRC_IREPT:                                                 // Alloc and init an IREPT
 245                 inobj->inobj.irept = malloc(sizeof(IREPT));
 246                 DEBUG printf("alloc IREPT\n");
 247                 break;
 248         }
 249
 250         // Install INOBJ on top of input stack
 251         inobj->in_ifent = ifent;                                // Record .if context on entry
 252         inobj->in_type = (WORD)typ;
 253         inobj->in_otok = tok;
 254         inobj->in_etok = etok;
 255         inobj->in_link = cur_inobj;
 256         cur_inobj = inobj;
 257
 258         return inobj;
 259 }
 260
 261
 262 //
 263 // Perform macro substitution from 'orig' to 'dest'. Return OK or some error.
 264 // A macro reference is in one of two forms:
 265 // \name <non-name-character>
 266 // \{name}
 267 // A doubled backslash (\\) is compressed to a single backslash (\).
 268 // Argument definitions have been pre-tokenized, so we have to turn them back
 269 // into text. This means that numbers, in particular, become hex, regardless of
 270 // their representation when the macro was invoked. This is a hack.
 271 // A label may appear at the beginning of the line:
 272 // :<name><whitespace>
 273 // (the colon must be in the first column). These labels are stripped before
 274 // macro expansion takes place.
 275 //
 276 int ExpandMacro(char * src, char * dest, int destsiz)
 277 {
 278         int i;
 279         int questmark;                  // \? for testing argument existence
 280         char mname[128];                // Assume max size of a formal arg name
 281         char numbuf[20];                // Buffer for text of CONSTs
 282         TOKEN * tk;
 283         SYM * arg;
 284         char ** symbolString;
 285
 286         DEBUG { printf("ExM: src=\"%s\"\n", src); }
 287
 288         IMACRO * imacro = cur_inobj->inobj.imacro;
 289         int macnum = (int)(imacro->im_macro->sattr);
 290
 291 //      destsiz--;
 292         char * dst = dest;                                              // Next dest slot
 293         char * edst = dest + destsiz - 1;               // End + 1(?) of dest buffer
 294
 295         // Check for (and skip over) any "label" on the line
 296         char * s = src;
 297         char * d = NULL;
 298
 299         if (*s == ':')
 300         {
 301                 while (*s != EOS && !(chrtab[*s] & WHITE))
 302                         s++;
 303
 304                 if (*s != EOS)
 305                         s++;                                                    // Skip first whitespace
 306         }
 307
 308         // Expand the rest of the line
 309         while (*s != EOS)
 310         {
 311                 // Copy single character
 312                 if (*s != '\\')
 313                 {
 314                         if (dst >= edst)
 315                                 goto overflow;
 316
 317                         *dst++ = *s++;
 318                 }
 319                 // Do macro expansion
 320                 else
 321                 {
 322                         questmark = 0;
 323
 324                         // Do special cases
 325                         switch (*++s)
 326                         {
 327                         case '\\':                                              // \\, \ (collapse to single backslash)
 328                                 if (dst >= edst)
 329                                         goto overflow;
 330
 331                                 *dst++ = *s++;
 332                                 continue;
 333                         case '?':                                               // \? <macro>  set `questmark' flag
 334                                 ++s;
 335                                 questmark = 1;
 336                                 break;
 337                         case '#':                                               // \#, number of arguments
 338                                 sprintf(numbuf, "%d", (int)imacro->im_nargs);
 339                                 goto copystr;
 340                         case '!':                                               // \! size suffix supplied on invocation
 341                                 switch ((int)imacro->im_siz)
 342                                 {
 343                                 case SIZN: d = "";   break;
 344                                 case SIZB: d = ".b"; break;
 345                                 case SIZW: d = ".w"; break;
 346                                 case SIZL: d = ".l"; break;
 347                                 }
 348
 349                                 goto copy_d;
 350                         case '~':                                               // ==> unique label string Mnnnn...
 351                                 sprintf(numbuf, "M%u", curuniq);
 352 copystr:
 353                                 d = numbuf;
 354 copy_d:
 355                                 s++;
 356
 357                                 while (*d != EOS)
 358                                 {
 359                                         if (dst >= edst)
 360                                                 goto overflow;
 361                                         else
 362                                                 *dst++ = *d++;
 363                                 }
 364
 365                                 continue;
 366                         case EOS:
 367                                 return error("missing argument name");
 368                         }
 369
 370                         // \n ==> argument number 'n', 0..9
 371                         if (chrtab[*s] & DIGIT)
 372                         {
 373                                 i = *s++ - '1';
 374
 375                                 if (i < 0)
 376                                         i = 9;
 377
 378                                 goto arg_num;
 379                         }
 380
 381                         // Get argument name: \name, \{name}
 382                         d = mname;
 383
 384                         // \label
 385                         if (*s != '{')
 386                         {
 387                                 do
 388                                 {
 389                                         *d++ = *s++;
 390                                 }
 391                                 while (chrtab[*s] & CTSYM);
 392                         }
 393                         // \\{label}
 394                         else
 395                         {
 396                                 for(++s; *s != EOS && *s != '}';)
 397                                         *d++ = *s++;
 398
 399                                 if (*s != '}')
 400                                         return error("missing '}'");
 401                                 else
 402                                         s++;
 403                         }
 404
 405                         *d = EOS;
 406
 407                         // Lookup the argument and copy its (string) value into the
 408                         // destination string
 409                         DEBUG printf("argument='%s'\n", mname);
 410
 411                         if ((arg = lookup(mname, MACARG, macnum)) == NULL)
 412                                 return errors("undefined argument: '%s'", mname);
 413                         else
 414                         {
 415                                 // Convert a string of tokens (terminated with EOL) back into
 416                                 // text. If an argument is out of range (not specified in the
 417                                 // macro invocation) then it is ignored.
 418                                 i = (int)arg->svalue;
 419 arg_num:
 420                                 DEBUG printf("~argnumber=%d (argBase=%u)\n", i, imacro->argBase);
 421                                 tk = NULL;
 422
 423                                 if (i < imacro->im_nargs)
 424                                 {
 425 #if 0
 426 //                                      tk = argp[i];
 427 //                                      tk = argPtrs[i];
 428                                         tk = argPtrs[imacro->argBase + i];
 429 #else
 430                                         tk = imacro->argument[i].token;
 431                                         symbolString = imacro->argument[i].string;
 432 //DEBUG
 433 //{
 434 //      printf("ExM: Preparing to parse argument #%u...\n", i);
 435 //      dumptok(tk);
 436 //}
 437 #endif
 438                                 }
 439
 440                                 // \?arg yields:
 441                                 //    0  if the argument is empty or non-existant,
 442                                 //    1  if the argument is not empty
 443                                 if (questmark)
 444                                 {
 445                                         if (tk == NULL || *tk == EOL)
 446                                                 questmark = 0;
 447
 448                                         if (dst >= edst)
 449                                                 goto overflow;
 450
 451                                         *dst++ = (char)(questmark + '0');
 452                                         continue;
 453                                 }
 454
 455                                 // Argument # is in range, so expand it
 456                                 if (tk != NULL)
 457                                 {
 458                                         while (*tk != EOL)
 459                                         {
 460                                                 // Reverse-translation from a token number to a string.
 461                                                 // This is a hack. It might be better table-driven.
 462                                                 d = NULL;
 463
 464                                                 if ((*tk >= KW_D0) && !rdsp && !rgpu)
 465                                                 {
 466                                                         d = regname[(int)*tk++ - KW_D0];
 467                                                         goto strcopy;
 468                                                 }
 469                                                 else if ((*tk >= KW_R0) && (*tk <= KW_R31))
 470                                                 {
 471                                                         d = riscregname[(int)*tk++ - KW_R0];
 472                                                         goto strcopy;
 473                                                 }
 474                                                 else
 475                                                 {
 476                                                         switch ((int)*tk++)
 477                                                         {
 478                                                         case SYMBOL:
 479 #if 0
 480 //                                                              d = (char *)*tk++;
 481                                                                 d = string[*tk++];
 482 #else
 483                                                                 // This fix should be done for strings too
 484                                                                 d = symbolString[*tk++];
 485 DEBUG printf("ExM: SYMBOL=\"%s\"", d);
 486 #endif
 487                                                                 break;
 488                                                         case STRING:
 489 #if 0
 490 //                                                              d = (char *)*tk++;
 491                                                                 d = string[*tk++];
 492 #else
 493                                                                 d = symbolString[*tk++];
 494 #endif
 495                                                                 if (dst >= edst)
 496                                                                         goto overflow;
 497
 498                                                                 *dst++ = '"';
 499
 500                                                                 while (*d != EOS)
 501                                                                 {
 502                                                                         if (dst >= edst)
 503                                                                                 goto overflow;
 504                                                                         else
 505                                                                                 *dst++ = *d++;
 506                                                                 }
 507
 508                                                                 if (dst >= edst)
 509                                                                         goto overflow;
 510
 511                                                                 *dst++ = '"';
 512                                                                 continue;
 513                                                                 break;
 514 // Shamus: Changing the format specifier from %lx to %ux caused
 515 //         the assembler to choke on legitimate code... Need to investigate
 516 //         this further before changing anything else here!
 517                                                         case CONST:
 518                                                                 sprintf(numbuf, "$%lx", (LONG)*tk++);
 519                                                                 d = numbuf;
 520                                                                 break;
 521                                                         case DEQUALS:
 522                                                                 d = "==";
 523                                                                 break;
 524                                                         case SET:
 525                                                                 d = "set";
 526                                                                 break;
 527                                                         case COLON:
 528                                                                 d = ":";
 529                                                                 break;
 530                                                         case DCOLON:
 531                                                                 d = "::";
 532                                                                 break;
 533                                                         case GE:
 534                                                                 d = ">=";
 535                                                                 break;
 536                                                         case LE:
 537                                                                 d = "<=";
 538                                                                 break;
 539                                                         case NE:
 540                                                                 d = "<>";
 541                                                                 break;
 542                                                         case SHR:
 543                                                                 d = ">>";
 544                                                                 break;
 545                                                         case SHL:
 546                                                                 d = "<<";
 547                                                                 break;
 548                                                         case DOTB:
 549                                                                 d = ".b";
 550                                                                 break;
 551                                                         case DOTW:
 552                                                                 d = ".w";
 553                                                                 break;
 554                                                         case DOTL:
 555                                                                 d = ".l";
 556                                                                 break;
 557                                                         case CR_DATE:
 558                                                                 d = "^^date";
 559                                                                 break;
 560                                                         case CR_TIME:
 561                                                                 d = "^^time";
 562                                                                 break;
 563                                                         case CR_DEFINED:
 564                                                                 d = "^^defined ";
 565                                                                 break;
 566                                                         case CR_REFERENCED:
 567                                                                 d = "^^referenced ";
 568                                                                 break;
 569                                                         case CR_STREQ:
 570                                                                 d = "^^streq ";
 571                                                                 break;
 572                                                         case CR_MACDEF:
 573                                                                 d = "^^macdef ";
 574                                                                 break;
 575                                                         default:
 576                                                                 if (dst >= edst)
 577                                                                         goto overflow;
 578
 579                                                                 *dst++ = (char)*(tk - 1);
 580                                                                 break;
 581                                                         }
 582                                                 }
 583
 584                                                 // If 'd' != NULL, copy string to destination
 585                                                 if (d != NULL)
 586                                                 {
 587 strcopy:
 588                                                         DEBUG printf("d='%s'\n", d);
 589
 590                                                         while (*d != EOS)
 591                                                         {
 592                                                                 if (dst >= edst)
 593                                                                         goto overflow;
 594                                                                 else
 595                                                                         *dst++ = *d++;
 596                                                         }
 597                                                 }
 598                                         }
 599                                 }
 600                         }
 601                 }
 602         }
 603
 604         *dst = EOS;
 605         DEBUG { printf("ExM: dst=\"%s\"\n", dest); }
 606         return OK;
 607
 608 overflow:
 609         *dst = EOS;
 610         DEBUG printf("*** OVERFLOW LINE ***\n%s\n", dest);
 611         return fatal("line too long as a result of macro expansion");
 612 }
 613
 614
 615 //
 616 // Get Next Line of Text from a Macro
 617 //
 618 char * GetNextMacroLine(void)
 619 {
 620         unsigned source_addr;
 621
 622         IMACRO * imacro = cur_inobj->inobj.imacro;
 623 //      LONG * strp = imacro->im_nextln;
 624         struct LineList * strp = imacro->im_nextln;
 625
 626         if (strp == NULL)                                               // End-of-macro
 627                 return NULL;
 628
 629 //      imacro->im_nextln = (LONG *)*strp;
 630         imacro->im_nextln = strp->next;
 631 //      ExpandMacro((char *)(strp + 1), imacro->im_lnbuf, LNSIZ);
 632         ExpandMacro(strp->line, imacro->im_lnbuf, LNSIZ);
 633
 634         return imacro->im_lnbuf;
 635 }
 636
 637
 638 //
 639 // Get Next Line of Text from a Repeat Block
 640 //
 641 char * GetNextRepeatLine(void)
 642 {
 643
 644         IREPT * irept = cur_inobj->inobj.irept;
 645         LONG * strp = irept->ir_nextln;                 // initial null
 646
 647         // Do repeat at end of .rept block's string list
 648         if (strp == NULL)
 649         {
 650                 DEBUG printf("back-to-top-of-repeat-block count=%d\n", (int)irept->ir_count);
 651                 irept->ir_nextln = irept->ir_firstln;   // copy first line
 652
 653                 if (irept->ir_count-- == 0)
 654                 {
 655                         DEBUG printf("end-repeat-block\n");
 656                         return NULL;
 657                 }
 658
 659                 strp = irept->ir_nextln;
 660         }
 661
 662         strcpy(irbuf, (char *)(irept->ir_nextln + 1));
 663         DEBUG printf("repeat line='%s'\n", irbuf);
 664         irept->ir_nextln = (LONG *)*strp;
 665
 666         return irbuf;
 667 }
 668
 669
 670 //
 671 // Include a Source File used at the Root, and for ".include" Files
 672 //
 673 int include(int handle, char * fname)
 674 {
 675         IFILE * ifile;
 676         INOBJ * inobj;
 677         FILEREC * fr;
 678
 679         // Verbose mode
 680         if (verb_flag)
 681                 printf("[include: %s, cfileno=%u]\n", fname, cfileno);
 682
 683         // Alloc and initialize include-descriptors
 684         inobj = a_inobj(SRC_IFILE);
 685         ifile = inobj->inobj.ifile;
 686
 687         ifile->ifhandle = handle;                               // Setup file handle
 688         ifile->ifind = ifile->ifcnt = 0;                // Setup buffer indices
 689         ifile->ifoldlineno = curlineno;                 // Save old line number
 690         ifile->ifoldfname = curfname;                   // Save old filename
 691         ifile->ifno = cfileno;                                  // Save old file number
 692
 693 //      cfileno = filecount++;                                  // Compute new file number
 694         // NB: This *must* be preincrement, we're adding one to the filecount here!
 695         cfileno = ++filecount;                                  // Compute NEW file number
 696         curfname = strdup(fname);                               // Set current filename (alloc storage)
 697         curlineno = 0;                                                  // Start on line zero
 698
 699         // Add another file to the file-record
 700         fr = (FILEREC *)malloc(sizeof(FILEREC));
 701         fr->frec_next = NULL;
 702         fr->frec_name = curfname;
 703
 704         if (last_fr == NULL)
 705                 filerec = fr;                                           // Add first filerec
 706         else
 707                 last_fr->frec_next = fr;                        // Append to list of filerecs
 708
 709         last_fr = fr;
 710         DEBUG printf("[include: curfname: %s, cfileno=%u]\n", curfname, cfileno);
 711
 712         return OK;
 713 }
 714
 715
 716 //
 717 // Pop the Current Input Level
 718 //
 719 int fpop(void)
 720 {
 721         IFILE * ifile;
 722         IMACRO * imacro;
 723         LONG * p, * p1;
 724         INOBJ * inobj = cur_inobj;
 725
 726         if (inobj != NULL)
 727         {
 728                 // Pop IFENT levels until we reach the conditional assembly context we
 729                 // were at when the input object was entered.
 730                 while (ifent != inobj->in_ifent)
 731                         d_endif();
 732
 733                 tok = inobj->in_otok;                           // Restore tok and otok
 734                 etok = inobj->in_etok;
 735
 736                 switch (inobj->in_type)
 737                 {
 738                 case SRC_IFILE:                                         // Pop and release an IFILE
 739                         if (verb_flag)
 740                                 printf("[Leaving: %s]\n", curfname);
 741
 742                         ifile = inobj->inobj.ifile;
 743                         ifile->if_link = f_ifile;
 744                         f_ifile = ifile;
 745                         close(ifile->ifhandle);                 // Close source file
 746 if (verb_flag) printf("[fpop (pre):  curfname=%s]\n", curfname);
 747                         curfname = ifile->ifoldfname;   // Set current filename
 748 if (verb_flag) printf("[fpop (post): curfname=%s]\n", curfname);
 749 if (verb_flag) printf("[fpop: (pre)  cfileno=%d ifile->ifno=%d]\n", (int)cfileno, (int)ifile->ifno);
 750                         curlineno = ifile->ifoldlineno; // Set current line#
 751                         DEBUG printf("cfileno=%d ifile->ifno=%d\n", (int)cfileno, (int)ifile->ifno);
 752                         cfileno = ifile->ifno;                  // Restore current file number
 753 if (verb_flag) printf("[fpop: (post) cfileno=%d ifile->ifno=%d]\n", (int)cfileno, (int)ifile->ifno);
 754                         break;
 755                 case SRC_IMACRO:                                        // Pop and release an IMACRO
 756                         imacro = inobj->inobj.imacro;
 757                         imacro->im_link = f_imacro;
 758                         f_imacro = imacro;
 759                         break;
 760                 case SRC_IREPT:                                         // Pop and release an IREPT
 761                         DEBUG printf("dealloc IREPT\n");
 762                         p = inobj->inobj.irept->ir_firstln;
 763
 764                         while (p != NULL)
 765                         {
 766                                 p1 = (LONG *)*p;
 767                                 p = p1;
 768                         }
 769
 770                         break;
 771                 }
 772
 773                 cur_inobj = inobj->in_link;
 774                 inobj->in_link = f_inobj;
 775                 f_inobj = inobj;
 776         }
 777
 778         return 0;
 779 }
 780
 781
 782 //
 783 // Get line from file into buf, return NULL on EOF or ptr to the start of a
 784 // null-term line
 785 //
 786 char * GetNextLine(void)
 787 {
 788         int i, j;
 789         char * p, * d;
 790         int readamt = -1;                                               // 0 if last read() yeilded 0 bytes
 791         IFILE * fl = cur_inobj->inobj.ifile;
 792
 793         for(;;)
 794         {
 795                 // Scan for next end-of-line; handle stupid text formats by treating
 796                 // \r\n the same as \n. (lone '\r' at end of buffer means we have to
 797                 // check for '\n').
 798 #if 0
 799                 i = 0;
 800                 j = fl->ifcnt;
 801                 d = &fl->ifbuf[fl->ifind];
 802
 803                 for(p=d; i<j; i++, p++)
 804 #else
 805                 d = &fl->ifbuf[fl->ifind];
 806
 807                 for(p=d, i=0, j=fl->ifcnt; i<j; i++, p++)
 808 #endif
 809                 {
 810                         if (*p == '\r' || *p == '\n')
 811                         {
 812                                 i++;
 813
 814                                 if (*p == '\r')
 815                                 {
 816                                         if (i >= j)
 817                                                 break;                  // Need to read more, then look for '\n' to eat
 818                                         else if (p[1] == '\n')
 819                                                 i++;
 820                                 }
 821
 822                                 // Cover up the newline with end-of-string sentinel
 823                                 *p = '\0';
 824
 825                                 fl->ifind += i;
 826                                 fl->ifcnt -= i;
 827                                 return d;
 828                         }
 829                 }
 830
 831                 // Handle hanging lines by ignoring them (Input file is exhausted, no
 832                 // \r or \n on last line)
 833                 // Shamus: This is retarded. Never ignore any input!
 834                 if (!readamt && fl->ifcnt)
 835                 {
 836 #if 0
 837                         fl->ifcnt = 0;
 838                         *p = '\0';
 839                         return NULL;
 840 #else
 841                         // Really should check to see if we're at the end of the buffer! :-P
 842                         fl->ifbuf[fl->ifind + fl->ifcnt] = '\0';
 843                         fl->ifcnt = 0;
 844                         return &fl->ifbuf[fl->ifind];
 845 #endif
 846                 }
 847
 848                 // Truncate and return absurdly long lines.
 849                 if (fl->ifcnt >= QUANTUM)
 850                 {
 851                         fl->ifbuf[fl->ifind + fl->ifcnt - 1] = '\0';
 852                         fl->ifcnt = 0;
 853                         return &fl->ifbuf[fl->ifind];
 854                 }
 855
 856                 // Relocate what's left of a line to the beginning of the buffer, and
 857                 // read some more of the file in; return NULL if the buffer's empty and
 858                 // on EOF.
 859                 if (fl->ifind != 0)
 860                 {
 861                         p = &fl->ifbuf[fl->ifind];
 862                         d = &fl->ifbuf[fl->ifcnt & 1];
 863
 864                         for(i=0; i<fl->ifcnt; i++)
 865                                 *d++ = *p++;
 866
 867                         fl->ifind = fl->ifcnt & 1;
 868                 }
 869
 870                 readamt = read(fl->ifhandle, &fl->ifbuf[fl->ifind + fl->ifcnt], QUANTUM);
 871
 872                 if (readamt < 0)
 873                         return NULL;
 874
 875                 if ((fl->ifcnt += readamt) == 0)
 876                         return NULL;
 877         }
 878 }
 879
 880
 881 //
 882 // Tokenize a Line
 883 //
 884 int TokenizeLine(void)
 885 {
 886         char * ln = NULL;                               // Ptr to current position in line
 887         char * p;                                               // Random character ptr
 888         TOKEN * tk;                                             // Token-deposit ptr
 889         int state = 0;                                  // State for keyword detector
 890         int j = 0;                                              // Var for keyword detector
 891         char c;                                                 // Random char
 892         VALUE v;                                                // Random value
 893         char * nullspot = NULL;                 // Spot to clobber for SYMBOL terminatn
 894         int stuffnull;                                  // 1:terminate SYMBOL '\0' at *nullspot
 895         char c1;
 896         int stringNum = 0;                              // Pointer to string locations in tokenized line
 897
 898 retry:
 899
 900         if (cur_inobj == NULL)                                  // Return EOF if input stack is empty
 901                 return TKEOF;
 902
 903         // Get another line of input from the current input source: a file,
 904         // a macro, or a repeat-block
 905         switch (cur_inobj->in_type)
 906         {
 907         // Include-file:
 908         // o  handle EOF;
 909         // o  bump source line number;
 910         // o  tag the listing-line with a space;
 911         // o  kludge lines generated by Alcyon C.
 912         case SRC_IFILE:
 913                 if ((ln = GetNextLine()) == NULL)
 914                 {
 915 if (verb_flag) printf("TokenizeLine: Calling fpop() from SRC_IFILE...\n");
 916                         fpop();                                                 // Pop input level
 917                         goto retry;                                             // Try for more lines
 918                 }
 919
 920                 curlineno++;                                            // Bump line number
 921                 lntag = SPACE;
 922
 923                 if (as68_flag)
 924                 {
 925                         // AS68 compatibility, throw away all lines starting with
 926                         // back-quotes, tildes, or '*'
 927                         // On other lines, turn the first '*' into a semi-colon.
 928                         if (*ln == '`' || *ln == '~' || *ln == '*')
 929                                 *ln = ';';
 930                         else
 931                         {
 932                                 for(p=ln; *p!=EOS; p++)
 933                                 {
 934                                         if (*p == '*')
 935                                         {
 936                                                 *p = ';';
 937                                                 break;
 938                                         }
 939                                 }
 940                         }
 941                 }
 942
 943                 break;
 944         // Macro-block:
 945         // o  Handle end-of-macro;
 946         // o  tag the listing-line with an at (@) sign.
 947         case SRC_IMACRO:
 948                 if ((ln = GetNextMacroLine()) == NULL)
 949                 {
 950                         ExitMacro();                                    // Exit macro (pop args, do fpop(), etc)
 951                         goto retry;                                             // Try for more lines...
 952                 }
 953
 954                 lntag = '@';
 955                 break;
 956         // Repeat-block:
 957         // o  Handle end-of-repeat-block;
 958         // o  tag the listing-line with a pound (#) sign.
 959         case SRC_IREPT:
 960                 if ((ln = GetNextRepeatLine()) == NULL)
 961                 {
 962 if (verb_flag) printf("TokenizeLine: Calling fpop() from SRC_IREPT...\n");
 963                         fpop();
 964                         goto retry;
 965                 }
 966
 967                 lntag = '#';
 968                 break;
 969         }
 970
 971         // Save text of the line.  We only do this during listings and within
 972         // macro-type blocks, since it is expensive to unconditionally copy every
 973         // line.
 974         if (lnsave)
 975                 strcpy(lnbuf, ln);
 976
 977         // General house-keeping
 978         tok = tokeol;                                                   // Set "tok" to EOL in case of error
 979         tk = etok;                                                              // Reset token ptr
 980         stuffnull = 0;                                                  // Don't stuff nulls
 981         totlines++;                                                             // Bump total #lines assembled
 982
 983         // See if the entire line is a comment. This is a win if the programmer
 984         // puts in lots of comments
 985         if (*ln == '*' || *ln == ';' || ((*ln == '/') && (*(ln + 1) == '/')))
 986                 goto goteol;
 987
 988         // Main tokenization loop;
 989         // o  skip whitespace;
 990         // o  handle end-of-line;
 991         // o  handle symbols;
 992         // o  handle single-character tokens (operators, etc.);
 993         // o  handle multiple-character tokens (constants, strings, etc.).
 994         for(; *ln!=EOS;)
 995         {
 996                 // Skip whitespace, handle EOL
 997                 while ((int)chrtab[*ln] & WHITE)
 998                         ln++;
 999
1000                 // Handle EOL, comment with ';'
1001                 if (*ln == EOS || *ln == ';'|| ((*ln == '/') && (*(ln + 1) == '/')))
1002                         break;
1003
1004                 // Handle start of symbol. Symbols are null-terminated in place. The
1005                 // termination is always one symbol behind, since there may be no place
1006                 // for a null in the case that an operator immediately follows the name.
1007                 c = chrtab[*ln];
1008
1009                 if (c & STSYM)
1010                 {
1011                         if (stuffnull)                                  // Terminate old symbol from previous pass
1012                                 *nullspot = EOS;
1013
1014                         v = 0;                                                  // Assume no DOT attrib follows symbol
1015                         stuffnull = 1;
1016                         p = nullspot = ln++;                    // Nullspot -> start of this symbol
1017
1018                         // Find end of symbol (and compute its length)
1019                         for(j=1; (int)chrtab[*ln]&CTSYM; j++)
1020                                 ln++;
1021
1022                         // Handle "DOT" special forms (like ".b") that follow a normal
1023                         // symbol or keyword:
1024                         if (*ln == '.')
1025                         {
1026                                 *ln++ = EOS;                            // Terminate symbol
1027                                 stuffnull = 0;                          // And never try it again
1028
1029                                 // Character following the `.' must have a DOT attribute, and
1030                                 // the chararacter after THAT one must not have a start-symbol
1031                                 // attribute (to prevent symbols that look like, for example,
1032                                 // "zingo.barf", which might be a good idea anyway....)
1033                                 if ((((int)chrtab[*ln] & DOT) == 0) || ((int)dotxtab[*ln] <= 0))
1034                                         return error("[bwsl] must follow `.' in symbol");
1035
1036                                 v = (VALUE)dotxtab[*ln++];
1037
1038                                 if ((int)chrtab[*ln] & CTSYM)
1039                                         return error("misuse of `.', not allowed in symbols");
1040                         }
1041
1042                         // If the symbol is small, check to see if it's really the name of
1043                         // a register.
1044                         if (j <= KWSIZE)
1045                         {
1046                                 for(state=0; state>=0;)
1047                                 {
1048                                         j = (int)tolowertab[*p++];
1049                                         j += kwbase[state];
1050
1051                                         if (kwcheck[j] != state)
1052                                         {
1053                                                 j = -1;
1054                                                 break;
1055                                         }
1056
1057                                         if (*p == EOS || p == ln)
1058                                         {
1059                                                 j = kwaccept[j];
1060                                                 break;
1061                                         }
1062
1063                                         state = kwtab[j];
1064                                 }
1065                         }
1066                         else
1067                         {
1068                                 j = -1;
1069                         }
1070
1071                         // Make j = -1 if user tries to use a RISC register while in 68K mode
1072                         if (!(rgpu || rdsp) && ((TOKEN)j >= KW_R0 && (TOKEN)j <= KW_R31))
1073                         {
1074                                 j = -1;
1075                         }
1076
1077                         //make j = -1 if time, date etc with no preceeding ^^
1078                         //defined, referenced, streq, macdef, date and time
1079                         switch ((TOKEN)j)
1080                         {
1081                         case 112:   // defined
1082                         case 113:   // referenced
1083                         case 118:   // streq
1084                         case 119:   // macdef
1085                         case 120:   // time
1086                         case 121:   // date
1087                                 j = -1;
1088 //                              break;
1089                         }
1090
1091                         // If not tokenized keyword OR token was not found
1092                         if (j < 0 || state < 0)
1093                         {
1094                                 *tk++ = SYMBOL;
1095 //#warning
1096 //problem here: nullspot is a char * but TOKEN is a uint32_t. On a 64-bit system,
1097 //this will cause all kinds of mischief.
1098 #if 0
1099                                 *tk++ = (TOKEN)nullspot;
1100 #else
1101                                 string[stringNum] = nullspot;
1102                                 *tk++ = stringNum;
1103                                 stringNum++;
1104 #endif
1105                         }
1106                         else
1107                         {
1108                                 *tk++ = (TOKEN)j;
1109                                 stuffnull = 0;
1110                         }
1111
1112                         if (v)                                                  // Record attribute token (if any)
1113                                 *tk++ = (TOKEN)v;
1114
1115                         if (stuffnull)                                  // Arrange for string termination on next pass
1116                                 nullspot = ln;
1117
1118                         continue;
1119                 }
1120
1121                 // Handle identity tokens
1122                 if (c & SELF)
1123                 {
1124                         *tk++ = *ln++;
1125                         continue;
1126                 }
1127
1128                 // Handle multiple-character tokens
1129                 if (c & MULTX)
1130                 {
1131                         switch (*ln++)
1132                         {
1133                         case '!':                                       // ! or !=
1134                                 if (*ln == '=')
1135                                 {
1136                                         *tk++ = NE;
1137                                         ++ln;
1138                                 }
1139                                 else
1140                                         *tk++ = '!';
1141
1142                                 continue;
1143                         case '\'':                                      // 'string'
1144                         case '\"':                                      // "string"
1145                                 c1 = ln[-1];
1146                                 *tk++ = STRING;
1147 //#warning
1148 // More char * stuffing (8 bytes) into the space of 4 (TOKEN).
1149 // Need to figure out how to fix this crap.
1150 #if 0
1151                                 *tk++ = (TOKEN)ln;
1152 #else
1153                                 string[stringNum] = ln;
1154                                 *tk++ = stringNum;
1155                                 stringNum++;
1156 #endif
1157
1158                                 for(p=ln; *ln!=EOS && *ln!=c1;)
1159                                 {
1160                                         c = *ln++;
1161
1162                                         if (c == '\\')
1163                                         {
1164                                                 switch (*ln++)
1165                                                 {
1166                                                 case EOS:
1167                                                         return(error("unterminated string"));
1168                                                 case 'e':
1169                                                         c = '\033';
1170                                                         break;
1171                                                 case 'n':
1172                                                         c = '\n';
1173                                                         break;
1174                                                 case 'b':
1175                                                         c = '\b';
1176                                                         break;
1177                                                 case 't':
1178                                                         c = '\t';
1179                                                         break;
1180                                                 case 'r':
1181                                                         c = '\r';
1182                                                         break;
1183                                                 case 'f':
1184                                                         c = '\f';
1185                                                         break;
1186                                                 case '\"':
1187                                                         c = '\"';
1188                                                         break;
1189                                                 case '\'':
1190                                                         c = '\'';
1191                                                         break;
1192                                                 case '\\':
1193                                                         c = '\\';
1194                                                         break;
1195                                                 default:
1196                                                         warn("bad backslash code in string");
1197                                                         ln--;
1198                                                         break;
1199                                                 }
1200                                         }
1201
1202                                         *p++ = c;
1203                                 }
1204
1205                                 if (*ln++ != c1)
1206                                         return error("unterminated string");
1207
1208                                 *p++ = EOS;
1209                                 continue;
1210                         case '$':                                       // $, hex constant
1211                                 if ((int)chrtab[*ln] & HDIGIT)
1212                                 {
1213                                         v = 0;
1214
1215                                         while ((int)hextab[*ln] >= 0)
1216                                                 v = (v << 4) + (int)hextab[*ln++];
1217
1218                                         if (*ln == '.')
1219                                         {
1220                                                 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1221                                                 {
1222                                                         v &= 0x000000FF;
1223                                                         ln += 2;
1224                                                 }
1225
1226                                                 if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1227                                                 {
1228                                                         v &= 0x0000FFFF;
1229                                                         ln += 2;
1230                                                 }
1231
1232                                                 if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1233                                                 {
1234                                                         ln += 2;
1235                                                 }
1236                                         }
1237
1238                                         *tk++ = CONST;
1239                                         *tk++ = v;
1240                                 }
1241                                 else
1242                                         *tk++ = '$';
1243
1244                                 continue;
1245                         case '<':                                       // < or << or <> or <=
1246                                 switch (*ln)
1247                                 {
1248                                 case '<':
1249                                         *tk++ = SHL;
1250                                         ++ln;
1251                                         continue;
1252                                 case '>':
1253                                         *tk++ = NE;
1254                                         ++ln;
1255                                         continue;
1256                                 case '=':
1257                                         *tk++ = LE;
1258                                         ++ln;
1259                                         continue;
1260                                 default:
1261                                         *tk++ = '<';
1262                                         continue;
1263                                 }
1264                         case ':':                                       // : or ::
1265                                 if (*ln == ':')
1266                                 {
1267                                         *tk++ = DCOLON;
1268                                         ++ln;
1269                                 }
1270                                 else
1271                                         *tk++ = ':';
1272
1273                                 continue;
1274                         case '=':                                       // = or ==
1275                                 if (*ln == '=')
1276                                 {
1277                                         *tk++ = DEQUALS;
1278                                         ++ln;
1279                                 }
1280                                 else
1281                                         *tk++ = '=';
1282
1283                                 continue;
1284                         case '>':                                       // > or >> or >=
1285                                 switch (*ln)
1286                                 {
1287                                 case '>':
1288                                         *tk++ = SHR;
1289                                         ln++;
1290                                         continue;
1291                                 case '=':
1292                                         *tk++ = GE;
1293                                         ln++;
1294                                         continue;
1295                                 default:
1296                                         *tk++ = '>';
1297                                         continue;
1298                                 }
1299                         case '%':                                       // % or binary constant
1300                                 if (*ln < '0' || *ln > '1')
1301                                 {
1302                                         *tk++ = '%';
1303                                         continue;
1304                                 }
1305
1306                                 v = 0;
1307
1308                                 while (*ln >= '0' && *ln <= '1')
1309                                         v = (v << 1) + *ln++ - '0';
1310
1311                                 if (*ln == '.')
1312                                 {
1313                                         if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1314                                         {
1315                                                 v &= 0x000000FF;
1316                                                 ln += 2;
1317                                         }
1318
1319                                         if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1320                                         {
1321                                                 v &= 0x0000FFFF;
1322                                                 ln += 2;
1323                                         }
1324
1325                                         if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1326                                         {
1327                                                 ln += 2;
1328                                         }
1329                                 }
1330
1331                                 *tk++ = CONST;
1332                                 *tk++ = v;
1333                                 continue;
1334                         case '@':                                       // @ or octal constant
1335                                 if (*ln < '0' || *ln > '7')
1336                                 {
1337                                         *tk++ = '@';
1338                                         continue;
1339                                 }
1340
1341                                 v = 0;
1342
1343                                 while (*ln >= '0' && *ln <= '7')
1344                                         v = (v << 3) + *ln++ - '0';
1345
1346                                 if (*ln == '.')
1347                                 {
1348                                         if ((*(ln+1) == 'b') || (*(ln+1) == 'B'))
1349                                         {
1350                                                 v &= 0x000000FF;
1351                                                 ln += 2;
1352                                         }
1353
1354                                         if ((*(ln+1) == 'w') || (*(ln+1) == 'W'))
1355                                         {
1356                                                 v &= 0x0000FFFF;
1357                                                 ln += 2;
1358                                         }
1359
1360                                         if ((*(ln+1) == 'l') || (*(ln+1) == 'L'))
1361                                         {
1362                                                 ln += 2;
1363                                         }
1364                                 }
1365
1366                                 *tk++ = CONST;
1367                                 *tk++ = v;
1368                                 continue;
1369                         case '^':                                       // ^ or ^^ <operator-name>
1370                                 if (*ln != '^')
1371                                 {
1372                                         *tk++ = '^';
1373                                         continue;
1374                                 }
1375
1376                                 if (((int)chrtab[*++ln] & STSYM) == 0)
1377                                 {
1378                                         error("invalid symbol following ^^");
1379                                         continue;
1380                                 }
1381
1382                                 p = ln++;
1383
1384                                 while ((int)chrtab[*ln] & CTSYM)
1385                                         ++ln;
1386
1387                                 for(state=0; state>=0;)
1388                                 {
1389                                         // Get char, convert to lowercase
1390                                         j = *p++;
1391
1392                                         if (j >= 'A' && j <= 'Z')
1393                                                 j += 0x20;
1394
1395                                         j += kwbase[state];
1396
1397                                         if (kwcheck[j] != state)
1398                                         {
1399                                                 j = -1;
1400                                                 break;
1401                                         }
1402
1403                                         if (*p == EOS || p == ln)
1404                                         {
1405                                                 j = kwaccept[j];
1406                                                 break;
1407                                         }
1408
1409                                         state = kwtab[j];
1410                                 }
1411
1412                                 if (j < 0 || state < 0)
1413                                 {
1414                                         error("unknown symbol following ^^");
1415                                         continue;
1416                                 }
1417
1418                                 *tk++ = (TOKEN)j;
1419                                 continue;
1420                         default:
1421                                 interror(2);                                 // Bad MULTX entry in chrtab
1422                                 continue;
1423                         }
1424                 }
1425
1426                 // Handle decimal constant
1427                 if (c & DIGIT)
1428                 {
1429                         v = 0;
1430
1431                         while ((int)chrtab[*ln] & DIGIT)
1432                                 v = (v * 10) + *ln++ - '0';
1433
1434                         // See if there's a .[bwl] after the constant & deal with it if so
1435                         if (*ln == '.')
1436                         {
1437                                 if ((*(ln + 1) == 'b') || (*(ln + 1) == 'B'))
1438                                 {
1439                                         v &= 0x000000FF;
1440                                         ln += 2;
1441                                 }
1442                                 else if ((*(ln + 1) == 'w') || (*(ln + 1) == 'W'))
1443                                 {
1444                                         v &= 0x0000FFFF;
1445                                         ln += 2;
1446                                 }
1447                                 else if ((*(ln + 1) == 'l') || (*(ln + 1) == 'L'))
1448                                 {
1449                                         ln += 2;
1450                                 }
1451                         }
1452
1453                         *tk++ = CONST;
1454                         *tk++ = v;
1455 //printf("CONST: %i\n", v);
1456                         continue;
1457                 }
1458
1459                 // Handle illegal character
1460                 return error("illegal character");
1461         }
1462
1463         // Terminate line of tokens and return "success."
1464
1465 goteol:
1466         tok = etok;                                                             // Set tok to beginning of line
1467
1468         if (stuffnull)                                                  // Terminate last SYMBOL
1469                 *nullspot = EOS;
1470
1471         *tk++ = EOL;
1472
1473         return OK;
1474 }
1475
1476
1477 //
1478 // .GOTO <label>        goto directive
1479 //
1480 // The label is searched for starting from the first line of the current,
1481 // enclosing macro definition. If no enclosing macro exists, an error is
1482 // generated.
1483 //
1484 // A label is of the form:
1485 //
1486 // :<name><whitespace>
1487 //
1488 // The colon must appear in column 1.  The label is stripped prior to macro
1489 // expansion, and is NOT subject to macro expansion.  The whitespace may also
1490 // be EOL.
1491 //
1492 //int d_goto(WORD siz) {
1493 //int d_goto(void)
1494 int d_goto(WORD unused)
1495 {
1496 //      char * sym;                                               // Label to search for
1497 //      LONG * defln;                                             // Macro definition strings
1498         char * s1;                                                // Temps for string comparison
1499         char * s2;
1500 //      IMACRO * imacro;                                          // Macro invocation block
1501
1502         // Setup for the search
1503         if (*tok != SYMBOL)
1504                 return error("missing label");
1505
1506 //      sym = (char *)tok[1];
1507         char * sym = string[tok[1]];
1508         tok += 2;
1509
1510         if (cur_inobj->in_type != SRC_IMACRO)
1511                 return error("goto not in macro");
1512
1513         IMACRO * imacro = cur_inobj->inobj.imacro;
1514 //      defln = (LONG *)imacro->im_macro->svalue;
1515         struct LineList * defln = imacro->im_macro->lineList;
1516
1517         // Find the label, starting with the first line.
1518 //      for(; defln!=NULL; defln=(LONG *)*defln)
1519         for(; defln!=NULL; defln=defln->next)
1520         {
1521 //              if (*(char *)(defln + 1) == ':')
1522                 if (defln->line[0] == ':')
1523                 {
1524                         // Compare names (sleazo string compare)
1525                         // This string compare is not right. Doesn't check for lengths.
1526                         // (actually it does, but in a crappy, unclear way.)
1527 #warning "!!! Bad string comparison !!!"
1528                         s1 = sym;
1529 //                      s2 = (char *)(defln + 1) + 1;
1530                         s2 = defln->line;
1531
1532                         while (*s1 == *s2)
1533                         {
1534                                 if (*s1 == EOS)
1535                                         break;
1536                                 else
1537                                 {
1538                                         s1++;
1539                                         s2++;
1540                                 }
1541                         }
1542
1543                         // Found the label, set new macro next-line and return.
1544                         if ((*s2 == EOS) || ((int)chrtab[*s2] & WHITE))
1545                         {
1546                                 imacro->im_nextln = defln;
1547                                 return 0;
1548                         }
1549                 }
1550         }
1551
1552         return error("goto label not found");
1553 }
1554
1555
1556 void DumpTokenBuffer(void)
1557 {
1558         TOKEN * t;
1559         printf("Tokens [%X]: ", sloc);
1560
1561         for(t=tokbuf; *t!=EOL; t++)
1562         {
1563                 if (*t == COLON)
1564                         printf("[COLON]");
1565                 else if (*t == CONST)
1566                 {
1567                         t++;
1568                         printf("[CONST: $%X]", (uint32_t)*t);
1569                 }
1570                 else if (*t == ACONST)
1571                         printf("[ACONST]");
1572                 else if (*t == STRING)
1573 //                      printf("[STRING]");
1574                 {
1575                         t++;
1576                         printf("[STRING:\"%s\"]", string[*t]);
1577                 }
1578                 else if (*t == SYMBOL)
1579                 {
1580                         t++;
1581                         printf("[SYMBOL:\"%s\"]", string[*t]);
1582                 }
1583                 else if (*t == EOS)
1584                         printf("[EOS]");
1585                 else if (*t == TKEOF)
1586                         printf("[TKEOF]");
1587                 else if (*t == DEQUALS)
1588                         printf("[DEQUALS]");
1589                 else if (*t == SET)
1590                         printf("[SET]");
1591                 else if (*t == REG)
1592                         printf("[REG]");
1593                 else if (*t == DCOLON)
1594                         printf("[DCOLON]");
1595                 else if (*t == GE)
1596                         printf("[GE]");
1597                 else if (*t == LE)
1598                         printf("[LE]");
1599                 else if (*t == NE)
1600                         printf("[NE]");
1601                 else if (*t == SHR)
1602                         printf("[SHR]");
1603                 else if (*t == SHL)
1604                         printf("[SHL]");
1605                 else if (*t == UNMINUS)
1606                         printf("[UNMINUS]");
1607                 else if (*t == DOTB)
1608                         printf("[DOTB]");
1609                 else if (*t == DOTW)
1610                         printf("[DOTW]");
1611                 else if (*t == DOTL)
1612                         printf("[DOTL]");
1613                 else if (*t == DOTI)
1614                         printf("[DOTI]");
1615                 else if (*t == ENDEXPR)
1616                         printf("[ENDEXPR]");
1617                 else if (*t == CR_DEFINED)
1618                         printf("[CR_DEFINED]");
1619                 else if (*t == CR_REFERENCED)
1620                         printf("[CR_REFERENCED]");
1621                 else if (*t == CR_STREQ)
1622                         printf("[CR_STREQ]");
1623                 else if (*t == CR_MACDEF)
1624                         printf("[CR_MACDEF]");
1625                 else if (*t == CR_TIME)
1626                         printf("[CR_TIME]");
1627                 else if (*t == CR_DATE)
1628                         printf("[CR_DATE]");
1629                 else if (*t >= 0x20 && *t <= 0x2F)
1630                         printf("[%c]", (char)*t);
1631                 else if (*t >= 0x3A && *t <= 0x3F)
1632                         printf("[%c]", (char)*t);
1633                 else if (*t >= 0x80 && *t <= 0x87)
1634                         printf("[D%u]", ((uint32_t)*t) - 0x80);
1635                 else if (*t >= 0x88 && *t <= 0x8F)
1636                         printf("[A%u]", ((uint32_t)*t) - 0x88);
1637                 else
1638                         printf("[%X:%c]", (uint32_t)*t, (char)*t);
1639 //                      printf("[%X]", (uint32_t)*t);
1640         }
1641
1642         printf("[EOL]\n");
1643 }
1644