git.gag.com Git - debian/pforth/blob - csrc/pf_guts.h

   1 /* @(#) pf_guts.h 98/01/28 1.4 */
   2 #ifndef _pf_guts_h
   3 #define _pf_guts_h
   4
   5 /***************************************************************
   6 ** Include file for PForth, a Forth based on 'C'
   7 **
   8 ** Author: Phil Burk
   9 ** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom
  10 **
  11 ** The pForth software code is dedicated to the public domain,
  12 ** and any third party may reproduce, distribute and modify
  13 ** the pForth software code or any derivative works thereof
  14 ** without any compensation or license.  The pForth software
  15 ** code is provided on an "as is" basis without any warranty
  16 ** of any kind, including, without limitation, the implied
  17 ** warranties of merchantability and fitness for a particular
  18 ** purpose and their equivalents under the laws of any jurisdiction.
  19 **
  20 ***************************************************************/
  21
  22 /*
  23 ** PFORTH_VERSION changes when PForth is modified and released.
  24 ** See README file for version info.
  25 */
  26 #define PFORTH_VERSION "27"
  27
  28 /*
  29 ** PFORTH_FILE_VERSION changes when incompatible changes are made
  30 ** in the ".dic" file format.
  31 **
  32 ** FV3 - 950225 - Use ABS_TO_CODEREL for CodePtr. See file "pf_save.c".
  33 ** FV4 - 950309 - Added NameSize and CodeSize to pfSaveForth().
  34 ** FV5 - 950316 - Added Floats and reserved words.
  35 ** FV6 - 961213 - Added ID_LOCAL_PLUSSTORE, ID_COLON_P, etc.
  36 ** FV7 - 971203 - Added ID_FILL, (1LOCAL@),  etc., ran out of reserved, resorted.
  37 ** FV8 - 980818 - Added Endian flag.
  38 ** FV9 - 20100503 - Added support for 64-bit CELL.
  39 */
  40 #define PF_FILE_VERSION (9)   /* Bump this whenever primitives added. */
  41 #define PF_EARLIEST_FILE_VERSION (9)  /* earliest one still compatible */
  42
  43 /***************************************************************
  44 ** Sizes and other constants
  45 ***************************************************************/
  46
  47 #define TIB_SIZE (256)
  48
  49 #ifndef FALSE
  50     #define FALSE (0)
  51 #endif
  52 #ifndef TRUE
  53     #define TRUE (1)
  54 #endif
  55
  56 #define FFALSE (0)
  57 #define FTRUE (-1)
  58 #define BLANK (' ')
  59
  60 #define FLAG_PRECEDENCE (0x80)
  61 #define FLAG_IMMEDIATE  (0x40)
  62 #define FLAG_SMUDGE     (0x20)
  63 #define MASK_NAME_SIZE  (0x1F)
  64
  65 /* Debug TRACE flags */
  66 #define TRACE_INNER     (0x0002)
  67 #define TRACE_COMPILE   (0x0004)
  68 #define TRACE_SPECIAL   (0x0008)
  69
  70 /* Numeric types returned by NUMBER? */
  71 #define NUM_TYPE_BAD    (0)
  72 #define NUM_TYPE_SINGLE (1)
  73 #define NUM_TYPE_DOUBLE (2)
  74 #define NUM_TYPE_FLOAT  (3)
  75
  76 #define CREATE_BODY_OFFSET  (3*sizeof(cell_t))
  77
  78 /***************************************************************
  79 ** Primitive Token IDS
  80 ** Do NOT change the order of these IDs or dictionary files will break!
  81 ***************************************************************/
  82 enum cforth_primitive_ids
  83 {
  84     ID_EXIT = 0,  /* ID_EXIT must always be zero. */
  85 /* Do NOT change the order of these IDs or dictionary files will break! */
  86     ID_1MINUS,
  87     ID_1PLUS,
  88     ID_2DUP,
  89     ID_2LITERAL,
  90     ID_2LITERAL_P,
  91     ID_2MINUS,
  92     ID_2OVER,
  93     ID_2PLUS,
  94     ID_2SWAP,
  95     ID_2_R_FETCH,
  96     ID_2_R_FROM,
  97     ID_2_TO_R,
  98     ID_ACCEPT_P,
  99     ID_ALITERAL,
 100     ID_ALITERAL_P,
 101     ID_ALLOCATE,
 102     ID_AND,
 103     ID_ARSHIFT,
 104     ID_BAIL,
 105     ID_BODY_OFFSET,
 106     ID_BRANCH,
 107     ID_BYE,
 108     ID_CALL_C,
 109     ID_CFETCH,
 110     ID_CMOVE,
 111     ID_CMOVE_UP,
 112     ID_COLON,
 113     ID_COLON_P,
 114     ID_COMPARE,
 115     ID_COMP_EQUAL,
 116     ID_COMP_GREATERTHAN,
 117     ID_COMP_LESSTHAN,
 118     ID_COMP_NOT_EQUAL,
 119     ID_COMP_U_GREATERTHAN,
 120     ID_COMP_U_LESSTHAN,
 121     ID_COMP_ZERO_EQUAL,
 122     ID_COMP_ZERO_GREATERTHAN,
 123     ID_COMP_ZERO_LESSTHAN,
 124     ID_COMP_ZERO_NOT_EQUAL,
 125     ID_CR,
 126     ID_CREATE,
 127     ID_CREATE_P,
 128     ID_CSTORE,
 129     ID_DEFER,
 130     ID_DEFER_P,
 131     ID_DEPTH,
 132     ID_DIVIDE,
 133     ID_DOT,
 134     ID_DOTS,
 135     ID_DO_P,
 136     ID_DROP,
 137     ID_DUMP,
 138     ID_DUP,
 139     ID_D_MINUS,
 140     ID_D_MTIMES,
 141     ID_D_MUSMOD,
 142     ID_D_PLUS,
 143     ID_D_UMSMOD,
 144     ID_D_UMTIMES,
 145     ID_EMIT,
 146     ID_EMIT_P,
 147     ID_EOL,
 148     ID_ERRORQ_P,
 149     ID_EXECUTE,
 150     ID_FETCH,
 151     ID_FILE_CLOSE,
 152     ID_FILE_CREATE,
 153     ID_FILE_OPEN,
 154     ID_FILE_POSITION,
 155     ID_FILE_READ,
 156     ID_FILE_REPOSITION,
 157     ID_FILE_RO,
 158     ID_FILE_RW,
 159     ID_FILE_SIZE,
 160     ID_FILE_WRITE,
 161     ID_FILL,
 162     ID_FIND,
 163     ID_FINDNFA,
 164     ID_FLUSHEMIT,
 165     ID_FREE,
 166     ID_HERE,
 167     ID_NUMBERQ_P,
 168     ID_I,
 169     ID_INCLUDE_FILE,
 170     ID_J,
 171     ID_KEY,
 172     ID_LEAVE_P,
 173     ID_LITERAL,
 174     ID_LITERAL_P,
 175     ID_LOADSYS,
 176     ID_LOCAL_COMPILER,
 177     ID_LOCAL_ENTRY,
 178     ID_LOCAL_EXIT,
 179     ID_LOCAL_FETCH,
 180     ID_LOCAL_FETCH_1,
 181     ID_LOCAL_FETCH_2,
 182     ID_LOCAL_FETCH_3,
 183     ID_LOCAL_FETCH_4,
 184     ID_LOCAL_FETCH_5,
 185     ID_LOCAL_FETCH_6,
 186     ID_LOCAL_FETCH_7,
 187     ID_LOCAL_FETCH_8,
 188     ID_LOCAL_PLUSSTORE,
 189     ID_LOCAL_STORE,
 190     ID_LOCAL_STORE_1,
 191     ID_LOCAL_STORE_2,
 192     ID_LOCAL_STORE_3,
 193     ID_LOCAL_STORE_4,
 194     ID_LOCAL_STORE_5,
 195     ID_LOCAL_STORE_6,
 196     ID_LOCAL_STORE_7,
 197     ID_LOCAL_STORE_8,
 198     ID_LOOP_P,
 199     ID_LSHIFT,
 200     ID_MAX,
 201     ID_MIN,
 202     ID_MINUS,
 203     ID_NAME_TO_PREVIOUS,
 204     ID_NAME_TO_TOKEN,
 205     ID_NOOP,
 206     ID_NUMBERQ,
 207     ID_OR,
 208     ID_OVER,
 209     ID_PICK,
 210     ID_PLUS,
 211     ID_PLUSLOOP_P,
 212     ID_PLUS_STORE,
 213     ID_QDO_P,
 214     ID_QDUP,
 215     ID_QTERMINAL,
 216     ID_QUIT_P,
 217     ID_REFILL,
 218     ID_RESIZE,
 219     ID_SOURCE_LINE_NUMBER_FETCH, /* used to be ID_RESTORE_INPUT */
 220     ID_ROLL,
 221     ID_ROT,
 222     ID_RP_FETCH,
 223     ID_RP_STORE,
 224     ID_RSHIFT,
 225     ID_R_DROP,
 226     ID_R_FETCH,
 227     ID_R_FROM,
 228     ID_SAVE_FORTH_P,
 229     ID_SOURCE_LINE_NUMBER_STORE, /* used to be ID_SAVE_INPUT */
 230     ID_SCAN,
 231     ID_SEMICOLON,
 232     ID_SKIP,
 233     ID_SOURCE,
 234     ID_SOURCE_ID,
 235     ID_SOURCE_ID_POP,
 236     ID_SOURCE_ID_PUSH,
 237     ID_SOURCE_SET,
 238     ID_SP_FETCH,
 239     ID_SP_STORE,
 240     ID_STORE,
 241     ID_SWAP,
 242     ID_TEST1,
 243     ID_TEST2,
 244     ID_TEST3,
 245     ID_TICK,
 246     ID_TIMES,
 247     ID_TO_R,
 248     ID_TYPE,
 249     ID_TYPE_P,
 250     ID_VAR_BASE,
 251     ID_VAR_CODE_BASE,
 252     ID_VAR_CODE_LIMIT,
 253     ID_VAR_CONTEXT,
 254     ID_VAR_DP,
 255     ID_VAR_ECHO,
 256     ID_VAR_HEADERS_BASE,
 257     ID_VAR_HEADERS_LIMIT,
 258     ID_VAR_HEADERS_PTR,
 259     ID_VAR_NUM_TIB,
 260     ID_VAR_OUT,
 261     ID_VAR_RETURN_CODE,
 262     ID_VAR_SOURCE_ID,
 263     ID_VAR_STATE,
 264     ID_VAR_TO_IN,
 265     ID_VAR_TRACE_FLAGS,
 266     ID_VAR_TRACE_LEVEL,
 267     ID_VAR_TRACE_STACK,
 268     ID_VLIST,
 269     ID_WORD,
 270     ID_WORD_FETCH,
 271     ID_WORD_STORE,
 272     ID_XOR,
 273     ID_ZERO_BRANCH,
 274     ID_CATCH,
 275     ID_THROW,
 276     ID_INTERPRET,
 277     ID_FILE_WO,
 278     ID_FILE_BIN,
 279     /* Added to support 64 bit operation. */
 280     ID_CELL,
 281     ID_CELLS,
 282     /* DELETE-FILE */
 283     ID_FILE_DELETE,
 284     ID_FILE_FLUSH,              /* FLUSH-FILE */
 285     ID_FILE_RENAME,             /* (RENAME-FILE) */
 286 /* If you add a word here, take away one reserved word below. */
 287 #ifdef PF_SUPPORT_FP
 288 /* Only reserve space if we are adding FP so that we can detect
 289 ** unsupported primitives when loading dictionary.
 290 */
 291     ID_RESERVED01,
 292     ID_RESERVED02,
 293     ID_RESERVED03,
 294     ID_RESERVED04,
 295     ID_RESERVED05,
 296     ID_RESERVED06,
 297     ID_RESERVED07,
 298     ID_RESERVED08,
 299     ID_RESERVED09,
 300     ID_RESERVED10,
 301     ID_RESERVED11,
 302     ID_FP_D_TO_F,
 303     ID_FP_FSTORE,
 304     ID_FP_FTIMES,
 305     ID_FP_FPLUS,
 306     ID_FP_FMINUS,
 307     ID_FP_FSLASH,
 308     ID_FP_F_ZERO_LESS_THAN,
 309     ID_FP_F_ZERO_EQUALS,
 310     ID_FP_F_LESS_THAN,
 311     ID_FP_F_TO_D,
 312     ID_FP_FFETCH,
 313     ID_FP_FDEPTH,
 314     ID_FP_FDROP,
 315     ID_FP_FDUP,
 316     ID_FP_FLITERAL,
 317     ID_FP_FLITERAL_P,
 318     ID_FP_FLOAT_PLUS,
 319     ID_FP_FLOATS,
 320     ID_FP_FLOOR,
 321     ID_FP_FMAX,
 322     ID_FP_FMIN,
 323     ID_FP_FNEGATE,
 324     ID_FP_FOVER,
 325     ID_FP_FROT,
 326     ID_FP_FROUND,
 327     ID_FP_FSWAP,
 328     ID_FP_FSTAR_STAR,
 329     ID_FP_FABS,
 330     ID_FP_FACOS,
 331     ID_FP_FACOSH,
 332     ID_FP_FALOG,
 333     ID_FP_FASIN,
 334     ID_FP_FASINH,
 335     ID_FP_FATAN,
 336     ID_FP_FATAN2,
 337     ID_FP_FATANH,
 338     ID_FP_FCOS,
 339     ID_FP_FCOSH,
 340     ID_FP_FLN,
 341     ID_FP_FLNP1,
 342     ID_FP_FLOG,
 343     ID_FP_FSIN,
 344     ID_FP_FSINCOS,
 345     ID_FP_FSINH,
 346     ID_FP_FSQRT,
 347     ID_FP_FTAN,
 348     ID_FP_FTANH,
 349     ID_FP_FPICK,
 350 #endif
 351 /* Add new IDs by replacing reserved IDs or extending FP routines. */
 352 /* Do NOT change the order of these IDs or dictionary files will break! */
 353     NUM_PRIMITIVES     /* This must always be LAST */
 354 };
 355
 356
 357
 358 /***************************************************************
 359 ** THROW Codes
 360 ***************************************************************/
 361 /* ANSI standard definitions needed by pForth */
 362 #define THROW_ABORT            (-1)
 363 #define THROW_ABORT_QUOTE      (-2)
 364 #define THROW_STACK_OVERFLOW   (-3)
 365 #define THROW_STACK_UNDERFLOW  (-4)
 366 #define THROW_UNDEFINED_WORD  (-13)
 367 #define THROW_EXECUTING       (-14)
 368 #define THROW_PAIRS           (-22)
 369 #define THROW_FLOAT_STACK_UNDERFLOW  ( -45)
 370 #define THROW_QUIT            (-56)
 371 #define THROW_FLUSH_FILE      (-68)
 372
 373 /* THROW codes unique to pForth */
 374 #define THROW_BYE            (-256) /* Exit program. */
 375 #define THROW_SEMICOLON      (-257) /* Error detected at ; */
 376 #define THROW_DEFERRED       (-258) /* Not a deferred word. Used in system.fth */
 377
 378 /***************************************************************
 379 ** Structures
 380 ***************************************************************/
 381
 382 typedef struct pfTaskData_s
 383 {
 384     cell_t   *td_StackPtr;       /* Primary data stack */
 385     cell_t   *td_StackBase;
 386     cell_t   *td_StackLimit;
 387     cell_t   *td_ReturnPtr;      /* Return stack */
 388     cell_t   *td_ReturnBase;
 389     cell_t   *td_ReturnLimit;
 390 #ifdef PF_SUPPORT_FP
 391     PF_FLOAT  *td_FloatStackPtr;
 392     PF_FLOAT  *td_FloatStackBase;
 393     PF_FLOAT  *td_FloatStackLimit;
 394 #endif
 395     cell_t   *td_InsPtr;          /* Instruction pointer, "PC" */
 396     FileStream   *td_InputStream;
 397 /* Terminal. */
 398     char    td_TIB[TIB_SIZE];   /* Buffer for terminal input. */
 399     cell_t    td_IN;              /* Index into Source */
 400     cell_t    td_SourceNum;       /* #TIB after REFILL */
 401     char   *td_SourcePtr;       /* Pointer to TIB or other source. */
 402     cell_t   td_LineNumber;      /* Incremented on every refill. */
 403     cell_t    td_OUT;             /* Current output column. */
 404 } pfTaskData_t;
 405
 406 typedef struct pfNode
 407 {
 408     struct pfNode *n_Next;
 409     struct pfNode *n_Prev;
 410 } pfNode;
 411
 412 /* Structure of header entry in dictionary. These will be stored in dictionary specific endian format*/
 413 typedef struct cfNameLinks
 414 {
 415     cell_t       cfnl_PreviousName;   /* name relative address of previous */
 416     ExecToken  cfnl_ExecToken;      /* Execution token for word. */
 417 /* Followed by variable length name field. */
 418 } cfNameLinks;
 419
 420 #define PF_DICF_ALLOCATED_SEGMENTS  ( 0x0001)
 421 typedef struct pfDictionary_s
 422 {
 423     pfNode  dic_Node;
 424     ucell_t  dic_Flags;
 425 /* Headers contain pointers to names and dictionary. */
 426
 427     ucell_t dic_HeaderBaseUnaligned;
 428
 429     ucell_t dic_HeaderBase;
 430     ucell_t dic_HeaderPtr;
 431     ucell_t dic_HeaderLimit;
 432 /* Code segment contains tokenized code and data. */
 433     ucell_t dic_CodeBaseUnaligned;
 434     ucell_t dic_CodeBase;
 435     union
 436     {
 437         cell_t  *Cell;
 438         uint8_t *Byte;
 439     } dic_CodePtr;
 440     ucell_t dic_CodeLimit;
 441 } pfDictionary_t;
 442
 443 /* Save state of include when nesting files. */
 444 typedef struct IncludeFrame
 445 {
 446     FileStream   *inf_FileID;
 447     cell_t         inf_LineNumber;
 448     cell_t         inf_SourceNum;
 449     cell_t         inf_IN;
 450     char          inf_SaveTIB[TIB_SIZE];
 451 } IncludeFrame;
 452
 453 #define MAX_INCLUDE_DEPTH (16)
 454
 455 /***************************************************************
 456 ** Prototypes
 457 ***************************************************************/
 458
 459 #ifdef __cplusplus
 460 extern "C" {
 461 #endif
 462
 463 int pfCatch( ExecToken XT );
 464
 465 #ifdef __cplusplus
 466 }
 467 #endif
 468
 469 /***************************************************************
 470 ** External Globals
 471 ***************************************************************/
 472 extern pfTaskData_t *gCurrentTask;
 473 extern pfDictionary_t *gCurrentDictionary;
 474 extern char          gScratch[TIB_SIZE];
 475 extern cell_t         gNumPrimitives;
 476
 477 extern ExecToken     gLocalCompiler_XT;      /* CFA of (LOCAL) compiler. */
 478 extern ExecToken     gNumberQ_XT;         /* XT of NUMBER? */
 479 extern ExecToken     gQuitP_XT;           /* XT of (QUIT) */
 480 extern ExecToken     gAcceptP_XT;         /* XT of ACCEPT */
 481
 482 #define DEPTH_AT_COLON_INVALID (-100)
 483 extern cell_t         gDepthAtColon;
 484
 485 /* Global variables. */
 486 extern cell_t        gVarContext;    /* Points to last name field. */
 487 extern cell_t        gVarState;      /* 1 if compiling. */
 488 extern cell_t        gVarBase;       /* Numeric Base. */
 489 extern cell_t        gVarEcho;       /* Echo input from file. */
 490 extern cell_t        gVarEchoAccept; /* Echo input from ACCEPT. */
 491 extern cell_t        gVarTraceLevel;
 492 extern cell_t        gVarTraceStack;
 493 extern cell_t        gVarTraceFlags;
 494 extern cell_t        gVarQuiet;      /* Suppress unnecessary messages, OK, etc. */
 495 extern cell_t        gVarReturnCode; /* Returned to caller of Forth, eg. UNIX shell. */
 496
 497 extern IncludeFrame  gIncludeStack[MAX_INCLUDE_DEPTH];
 498 extern cell_t         gIncludeIndex;
 499 /***************************************************************
 500 ** Macros
 501 ***************************************************************/
 502
 503
 504 /* Endian specific macros for creating target dictionaries for machines with
 505
 506 ** different endian-ness.
 507
 508 */
 509
 510 #if defined(PF_BIG_ENDIAN_DIC)
 511
 512 #define WRITE_FLOAT_DIC             WriteFloatBigEndian
 513 #define WRITE_CELL_DIC(addr,data)   WriteCellBigEndian((uint8_t *)(addr),(ucell_t)(data))
 514 #define WRITE_SHORT_DIC(addr,data)  Write16BigEndian((uint8_t *)(addr),(uint16_t)(data))
 515 #define READ_FLOAT_DIC              ReadFloatBigEndian
 516 #define READ_CELL_DIC(addr)         ReadCellBigEndian((const uint8_t *)(addr))
 517 #define READ_SHORT_DIC(addr)        Read16BigEndian((const uint8_t *)(addr))
 518
 519 #elif defined(PF_LITTLE_ENDIAN_DIC)
 520
 521 #define WRITE_FLOAT_DIC             WriteFloatLittleEndian
 522 #define WRITE_CELL_DIC(addr,data)   WriteCellLittleEndian((uint8_t *)(addr),(ucell_t)(data))
 523 #define WRITE_SHORT_DIC(addr,data)  Write16LittleEndian((uint8_t *)(addr),(uint16_t)(data))
 524 #define READ_FLOAT_DIC              ReadFloatLittleEndian
 525 #define READ_CELL_DIC(addr)         ReadCellLittleEndian((const uint8_t *)(addr))
 526 #define READ_SHORT_DIC(addr)        Read16LittleEndian((const uint8_t *)(addr))
 527
 528 #else
 529
 530 #define WRITE_FLOAT_DIC(addr,data)  { *((PF_FLOAT *)(addr)) = (PF_FLOAT)(data); }
 531 #define WRITE_CELL_DIC(addr,data)   { *((cell_t *)(addr)) = (cell_t)(data); }
 532 #define WRITE_SHORT_DIC(addr,data)  { *((int16_t *)(addr)) = (int16_t)(data); }
 533 #define READ_FLOAT_DIC(addr)        ( *((PF_FLOAT *)(addr)) )
 534 #define READ_CELL_DIC(addr)         ( *((const ucell_t *)(addr)) )
 535 #define READ_SHORT_DIC(addr)        ( *((const uint16_t *)(addr)) )
 536
 537 #endif
 538
 539
 540 #define HEADER_HERE (gCurrentDictionary->dic_HeaderPtr.Cell)
 541 #define CODE_HERE (gCurrentDictionary->dic_CodePtr.Cell)
 542 #define CODE_COMMA( N ) WRITE_CELL_DIC(CODE_HERE++,(N))
 543 #define NAME_BASE (gCurrentDictionary->dic_HeaderBase)
 544 #define CODE_BASE (gCurrentDictionary->dic_CodeBase)
 545 #define NAME_SIZE (gCurrentDictionary->dic_HeaderLimit - gCurrentDictionary->dic_HeaderBase)
 546 #define CODE_SIZE (gCurrentDictionary->dic_CodeLimit - gCurrentDictionary->dic_CodeBase)
 547
 548 #define IN_CODE_DIC(addr) ( ( ((uint8_t *)(addr)) >= gCurrentDictionary->dic_CodeBase)   && ( ((uint8_t *)(addr)) < gCurrentDictionary->dic_CodeLimit) )
 549
 550 #define IN_NAME_DIC(addr) ( ( ((uint8_t *)(addr)) >= gCurrentDictionary->dic_HeaderBase) && ( ((uint8_t *)(addr)) < gCurrentDictionary->dic_HeaderLimit) )
 551 #define IN_DICS(addr) (IN_CODE_DIC(addr) || IN_NAME_DIC(addr))
 552
 553 /* Address conversion */
 554 #define ABS_TO_NAMEREL( a ) ((cell_t)  (((ucell_t) a) - NAME_BASE ))
 555 #define ABS_TO_CODEREL( a ) ((cell_t)  (((ucell_t) a) - CODE_BASE ))
 556 #define NAMEREL_TO_ABS( a ) ((ucell_t) (((cell_t) a) + NAME_BASE))
 557 #define CODEREL_TO_ABS( a ) ((ucell_t) (((cell_t) a) + CODE_BASE))
 558
 559 /* The check for >0 is only needed for CLONE testing. !!! */
 560 #define IsTokenPrimitive(xt) ((xt<gNumPrimitives) && (xt>=0))
 561
 562 #define FREE_VAR(v) { if (v) { pfFreeMem((void *)(v)); v = 0; } }
 563
 564 #define DATA_STACK_DEPTH (gCurrentTask->td_StackBase - gCurrentTask->td_StackPtr)
 565 #define DROP_DATA_STACK (gCurrentTask->td_StackPtr++)
 566 #define POP_DATA_STACK (*gCurrentTask->td_StackPtr++)
 567 #define PUSH_DATA_STACK(x) {*(--(gCurrentTask->td_StackPtr)) = (cell_t) x; }
 568
 569 /* Force Quad alignment. */
 570 #define QUADUP(x) (((x)+3)&~3)
 571
 572 #define MIN(a,b)  ( ((a)<(b)) ? (a) : (b) )
 573 #define MAX(a,b)  ( ((a)>(b)) ? (a) : (b) )
 574
 575
 576 #ifndef TOUCH
 577     #define TOUCH(argument) ((void)argument)
 578 #endif
 579
 580 /***************************************************************
 581 ** I/O related macros
 582 ***************************************************************/
 583
 584 #define EMIT(c)  ioEmit(c)
 585 #define EMIT_CR  EMIT('\n');
 586
 587 #define MSG(cs)   pfMessage(cs)
 588 #define ERR(x)    MSG(x)
 589
 590 #define DBUG(x)  /* PRT(x) */
 591 #define DBUGX(x) /* DBUG(x) */
 592
 593 #define MSG_NUM_D(msg,num) { MSG(msg); ffDot((cell_t) num); EMIT_CR; }
 594 #define MSG_NUM_H(msg,num) { MSG(msg); ffDotHex((cell_t) num); EMIT_CR; }
 595
 596 #define DBUG_NUM_D(msg,num) { pfDebugMessage(msg); pfDebugPrintDecimalNumber((cell_t) num); pfDebugMessage("\n"); }
 597
 598 #endif  /* _pf_guts_h */