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   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 "28"
  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 ** FV10 - 20170103 - Added ID_FILE_FLUSH ID_FILE_RENAME ID_FILE_RESIZE
  40 */
  41 #define PF_FILE_VERSION (10)   /* Bump this whenever primitives added. */
  42 #define PF_EARLIEST_FILE_VERSION (9)  /* earliest one still compatible */
  43
  44 /***************************************************************
  45 ** Sizes and other constants
  46 ***************************************************************/
  47
  48 #define TIB_SIZE (256)
  49
  50 #ifndef FALSE
  51     #define FALSE (0)
  52 #endif
  53 #ifndef TRUE
  54     #define TRUE (1)
  55 #endif
  56
  57 #define FFALSE (0)
  58 #define FTRUE (-1)
  59 #define BLANK (' ')
  60
  61 #define FLAG_PRECEDENCE (0x80)
  62 #define FLAG_IMMEDIATE  (0x40)
  63 #define FLAG_SMUDGE     (0x20)
  64 #define MASK_NAME_SIZE  (0x1F)
  65
  66 /* Debug TRACE flags */
  67 #define TRACE_INNER     (0x0002)
  68 #define TRACE_COMPILE   (0x0004)
  69 #define TRACE_SPECIAL   (0x0008)
  70
  71 /* Numeric types returned by NUMBER? */
  72 #define NUM_TYPE_BAD    (0)
  73 #define NUM_TYPE_SINGLE (1)
  74 #define NUM_TYPE_DOUBLE (2)
  75 #define NUM_TYPE_FLOAT  (3)
  76
  77 #define CREATE_BODY_OFFSET  (3*sizeof(cell_t))
  78
  79 /***************************************************************
  80 ** Primitive Token IDS
  81 ** Do NOT change the order of these IDs or dictionary files will break!
  82 ***************************************************************/
  83 enum cforth_primitive_ids
  84 {
  85     ID_EXIT = 0,  /* ID_EXIT must always be zero. */
  86 /* Do NOT change the order of these IDs or dictionary files will break! */
  87     ID_1MINUS,
  88     ID_1PLUS,
  89     ID_2DUP,
  90     ID_2LITERAL,
  91     ID_2LITERAL_P,
  92     ID_2MINUS,
  93     ID_2OVER,
  94     ID_2PLUS,
  95     ID_2SWAP,
  96     ID_2_R_FETCH,
  97     ID_2_R_FROM,
  98     ID_2_TO_R,
  99     ID_ACCEPT_P,
 100     ID_ALITERAL,
 101     ID_ALITERAL_P,
 102     ID_ALLOCATE,
 103     ID_AND,
 104     ID_ARSHIFT,
 105     ID_BAIL,
 106     ID_BODY_OFFSET,
 107     ID_BRANCH,
 108     ID_BYE,
 109     ID_CALL_C,
 110     ID_CFETCH,
 111     ID_CMOVE,
 112     ID_CMOVE_UP,
 113     ID_COLON,
 114     ID_COLON_P,
 115     ID_COMPARE,
 116     ID_COMP_EQUAL,
 117     ID_COMP_GREATERTHAN,
 118     ID_COMP_LESSTHAN,
 119     ID_COMP_NOT_EQUAL,
 120     ID_COMP_U_GREATERTHAN,
 121     ID_COMP_U_LESSTHAN,
 122     ID_COMP_ZERO_EQUAL,
 123     ID_COMP_ZERO_GREATERTHAN,
 124     ID_COMP_ZERO_LESSTHAN,
 125     ID_COMP_ZERO_NOT_EQUAL,
 126     ID_CR,
 127     ID_CREATE,
 128     ID_CREATE_P,
 129     ID_CSTORE,
 130     ID_DEFER,
 131     ID_DEFER_P,
 132     ID_DEPTH,
 133     ID_DIVIDE,
 134     ID_DOT,
 135     ID_DOTS,
 136     ID_DO_P,
 137     ID_DROP,
 138     ID_DUMP,
 139     ID_DUP,
 140     ID_D_MINUS,
 141     ID_D_MTIMES,
 142     ID_D_MUSMOD,
 143     ID_D_PLUS,
 144     ID_D_UMSMOD,
 145     ID_D_UMTIMES,
 146     ID_EMIT,
 147     ID_EMIT_P,
 148     ID_EOL,
 149     ID_ERRORQ_P,
 150     ID_EXECUTE,
 151     ID_FETCH,
 152     ID_FILE_CLOSE,
 153     ID_FILE_CREATE,
 154     ID_FILE_OPEN,
 155     ID_FILE_POSITION,
 156     ID_FILE_READ,
 157     ID_FILE_REPOSITION,
 158     ID_FILE_RO,
 159     ID_FILE_RW,
 160     ID_FILE_SIZE,
 161     ID_FILE_WRITE,
 162     ID_FILL,
 163     ID_FIND,
 164     ID_FINDNFA,
 165     ID_FLUSHEMIT,
 166     ID_FREE,
 167     ID_HERE,
 168     ID_NUMBERQ_P,
 169     ID_I,
 170     ID_INCLUDE_FILE,
 171     ID_J,
 172     ID_KEY,
 173     ID_LEAVE_P,
 174     ID_LITERAL,
 175     ID_LITERAL_P,
 176     ID_LOADSYS,
 177     ID_LOCAL_COMPILER,
 178     ID_LOCAL_ENTRY,
 179     ID_LOCAL_EXIT,
 180     ID_LOCAL_FETCH,
 181     ID_LOCAL_FETCH_1,
 182     ID_LOCAL_FETCH_2,
 183     ID_LOCAL_FETCH_3,
 184     ID_LOCAL_FETCH_4,
 185     ID_LOCAL_FETCH_5,
 186     ID_LOCAL_FETCH_6,
 187     ID_LOCAL_FETCH_7,
 188     ID_LOCAL_FETCH_8,
 189     ID_LOCAL_PLUSSTORE,
 190     ID_LOCAL_STORE,
 191     ID_LOCAL_STORE_1,
 192     ID_LOCAL_STORE_2,
 193     ID_LOCAL_STORE_3,
 194     ID_LOCAL_STORE_4,
 195     ID_LOCAL_STORE_5,
 196     ID_LOCAL_STORE_6,
 197     ID_LOCAL_STORE_7,
 198     ID_LOCAL_STORE_8,
 199     ID_LOOP_P,
 200     ID_LSHIFT,
 201     ID_MAX,
 202     ID_MIN,
 203     ID_MINUS,
 204     ID_NAME_TO_PREVIOUS,
 205     ID_NAME_TO_TOKEN,
 206     ID_NOOP,
 207     ID_NUMBERQ,
 208     ID_OR,
 209     ID_OVER,
 210     ID_PICK,
 211     ID_PLUS,
 212     ID_PLUSLOOP_P,
 213     ID_PLUS_STORE,
 214     ID_QDO_P,
 215     ID_QDUP,
 216     ID_QTERMINAL,
 217     ID_QUIT_P,
 218     ID_REFILL,
 219     ID_RESIZE,
 220     ID_SOURCE_LINE_NUMBER_FETCH, /* used to be ID_RESTORE_INPUT */
 221     ID_ROLL,
 222     ID_ROT,
 223     ID_RP_FETCH,
 224     ID_RP_STORE,
 225     ID_RSHIFT,
 226     ID_R_DROP,
 227     ID_R_FETCH,
 228     ID_R_FROM,
 229     ID_SAVE_FORTH_P,
 230     ID_SOURCE_LINE_NUMBER_STORE, /* used to be ID_SAVE_INPUT */
 231     ID_SCAN,
 232     ID_SEMICOLON,
 233     ID_SKIP,
 234     ID_SOURCE,
 235     ID_SOURCE_ID,
 236     ID_SOURCE_ID_POP,
 237     ID_SOURCE_ID_PUSH,
 238     ID_SOURCE_SET,
 239     ID_SP_FETCH,
 240     ID_SP_STORE,
 241     ID_STORE,
 242     ID_SWAP,
 243     ID_TEST1,
 244     ID_TEST2,
 245     ID_TEST3,
 246     ID_TICK,
 247     ID_TIMES,
 248     ID_TO_R,
 249     ID_TYPE,
 250     ID_TYPE_P,
 251     ID_VAR_BASE,
 252     ID_VAR_CODE_BASE,
 253     ID_VAR_CODE_LIMIT,
 254     ID_VAR_CONTEXT,
 255     ID_VAR_DP,
 256     ID_VAR_ECHO,
 257     ID_VAR_HEADERS_BASE,
 258     ID_VAR_HEADERS_LIMIT,
 259     ID_VAR_HEADERS_PTR,
 260     ID_VAR_NUM_TIB,
 261     ID_VAR_OUT,
 262     ID_VAR_RETURN_CODE,
 263     ID_VAR_SOURCE_ID,
 264     ID_VAR_STATE,
 265     ID_VAR_TO_IN,
 266     ID_VAR_TRACE_FLAGS,
 267     ID_VAR_TRACE_LEVEL,
 268     ID_VAR_TRACE_STACK,
 269     ID_VLIST,
 270     ID_WORD,
 271     ID_WORD_FETCH,
 272     ID_WORD_STORE,
 273     ID_XOR,
 274     ID_ZERO_BRANCH,
 275     ID_CATCH,
 276     ID_THROW,
 277     ID_INTERPRET,
 278     ID_FILE_WO,
 279     ID_FILE_BIN,
 280     /* Added to support 64 bit operation. */
 281     ID_CELL,
 282     ID_CELLS,
 283     /* DELETE-FILE */
 284     ID_FILE_DELETE,
 285     ID_FILE_FLUSH,              /* FLUSH-FILE */
 286     ID_FILE_RENAME,             /* (RENAME-FILE) */
 287     ID_FILE_RESIZE,             /* RESIZE-FILE */
 288 /* If you add a word here, take away one reserved word below. */
 289 #ifdef PF_SUPPORT_FP
 290 /* Only reserve space if we are adding FP so that we can detect
 291 ** unsupported primitives when loading dictionary.
 292 */
 293     ID_RESERVED01,
 294     ID_RESERVED02,
 295     ID_RESERVED03,
 296     ID_RESERVED04,
 297     ID_RESERVED05,
 298     ID_RESERVED06,
 299     ID_RESERVED07,
 300     ID_RESERVED08,
 301     ID_RESERVED09,
 302     ID_RESERVED10,
 303     ID_FP_D_TO_F,
 304     ID_FP_FSTORE,
 305     ID_FP_FTIMES,
 306     ID_FP_FPLUS,
 307     ID_FP_FMINUS,
 308     ID_FP_FSLASH,
 309     ID_FP_F_ZERO_LESS_THAN,
 310     ID_FP_F_ZERO_EQUALS,
 311     ID_FP_F_LESS_THAN,
 312     ID_FP_F_TO_D,
 313     ID_FP_FFETCH,
 314     ID_FP_FDEPTH,
 315     ID_FP_FDROP,
 316     ID_FP_FDUP,
 317     ID_FP_FLITERAL,
 318     ID_FP_FLITERAL_P,
 319     ID_FP_FLOAT_PLUS,
 320     ID_FP_FLOATS,
 321     ID_FP_FLOOR,
 322     ID_FP_FMAX,
 323     ID_FP_FMIN,
 324     ID_FP_FNEGATE,
 325     ID_FP_FOVER,
 326     ID_FP_FROT,
 327     ID_FP_FROUND,
 328     ID_FP_FSWAP,
 329     ID_FP_FSTAR_STAR,
 330     ID_FP_FABS,
 331     ID_FP_FACOS,
 332     ID_FP_FACOSH,
 333     ID_FP_FALOG,
 334     ID_FP_FASIN,
 335     ID_FP_FASINH,
 336     ID_FP_FATAN,
 337     ID_FP_FATAN2,
 338     ID_FP_FATANH,
 339     ID_FP_FCOS,
 340     ID_FP_FCOSH,
 341     ID_FP_FLN,
 342     ID_FP_FLNP1,
 343     ID_FP_FLOG,
 344     ID_FP_FSIN,
 345     ID_FP_FSINCOS,
 346     ID_FP_FSINH,
 347     ID_FP_FSQRT,
 348     ID_FP_FTAN,
 349     ID_FP_FTANH,
 350     ID_FP_FPICK,
 351 #endif
 352 /* Add new IDs by replacing reserved IDs or extending FP routines. */
 353 /* Do NOT change the order of these IDs or dictionary files will break! */
 354     NUM_PRIMITIVES     /* This must always be LAST */
 355 };
 356
 357
 358
 359 /***************************************************************
 360 ** THROW Codes
 361 ***************************************************************/
 362 /* ANSI standard definitions needed by pForth */
 363 #define THROW_ABORT            (-1)
 364 #define THROW_ABORT_QUOTE      (-2)
 365 #define THROW_STACK_OVERFLOW   (-3)
 366 #define THROW_STACK_UNDERFLOW  (-4)
 367 #define THROW_UNDEFINED_WORD  (-13)
 368 #define THROW_EXECUTING       (-14)
 369 #define THROW_PAIRS           (-22)
 370 #define THROW_FLOAT_STACK_UNDERFLOW  ( -45)
 371 #define THROW_QUIT            (-56)
 372 #define THROW_FLUSH_FILE      (-68)
 373 #define THROW_RESIZE_FILE     (-74)
 374
 375 /* THROW codes unique to pForth */
 376 #define THROW_BYE            (-256) /* Exit program. */
 377 #define THROW_SEMICOLON      (-257) /* Error detected at ; */
 378 #define THROW_DEFERRED       (-258) /* Not a deferred word. Used in system.fth */
 379
 380 /***************************************************************
 381 ** Structures
 382 ***************************************************************/
 383
 384 typedef struct pfTaskData_s
 385 {
 386     cell_t   *td_StackPtr;       /* Primary data stack */
 387     cell_t   *td_StackBase;
 388     cell_t   *td_StackLimit;
 389     cell_t   *td_ReturnPtr;      /* Return stack */
 390     cell_t   *td_ReturnBase;
 391     cell_t   *td_ReturnLimit;
 392 #ifdef PF_SUPPORT_FP
 393     PF_FLOAT  *td_FloatStackPtr;
 394     PF_FLOAT  *td_FloatStackBase;
 395     PF_FLOAT  *td_FloatStackLimit;
 396 #endif
 397     cell_t   *td_InsPtr;          /* Instruction pointer, "PC" */
 398     FileStream   *td_InputStream;
 399 /* Terminal. */
 400     char    td_TIB[TIB_SIZE];   /* Buffer for terminal input. */
 401     cell_t    td_IN;              /* Index into Source */
 402     cell_t    td_SourceNum;       /* #TIB after REFILL */
 403     char   *td_SourcePtr;       /* Pointer to TIB or other source. */
 404     cell_t   td_LineNumber;      /* Incremented on every refill. */
 405     cell_t    td_OUT;             /* Current output column. */
 406 } pfTaskData_t;
 407
 408 typedef struct pfNode
 409 {
 410     struct pfNode *n_Next;
 411     struct pfNode *n_Prev;
 412 } pfNode;
 413
 414 /* Structure of header entry in dictionary. These will be stored in dictionary specific endian format*/
 415 typedef struct cfNameLinks
 416 {
 417     cell_t       cfnl_PreviousName;   /* name relative address of previous */
 418     ExecToken  cfnl_ExecToken;      /* Execution token for word. */
 419 /* Followed by variable length name field. */
 420 } cfNameLinks;
 421
 422 #define PF_DICF_ALLOCATED_SEGMENTS  ( 0x0001)
 423 typedef struct pfDictionary_s
 424 {
 425     pfNode  dic_Node;
 426     ucell_t  dic_Flags;
 427 /* Headers contain pointers to names and dictionary. */
 428
 429     ucell_t dic_HeaderBaseUnaligned;
 430
 431     ucell_t dic_HeaderBase;
 432     ucell_t dic_HeaderPtr;
 433     ucell_t dic_HeaderLimit;
 434 /* Code segment contains tokenized code and data. */
 435     ucell_t dic_CodeBaseUnaligned;
 436     ucell_t dic_CodeBase;
 437     union
 438     {
 439         cell_t  *Cell;
 440         uint8_t *Byte;
 441     } dic_CodePtr;
 442     ucell_t dic_CodeLimit;
 443 } pfDictionary_t;
 444
 445 /* Save state of include when nesting files. */
 446 typedef struct IncludeFrame
 447 {
 448     FileStream   *inf_FileID;
 449     cell_t         inf_LineNumber;
 450     cell_t         inf_SourceNum;
 451     cell_t         inf_IN;
 452     char          inf_SaveTIB[TIB_SIZE];
 453 } IncludeFrame;
 454
 455 #define MAX_INCLUDE_DEPTH (16)
 456
 457 /***************************************************************
 458 ** Prototypes
 459 ***************************************************************/
 460
 461 #ifdef __cplusplus
 462 extern "C" {
 463 #endif
 464
 465 ThrowCode pfCatch( ExecToken XT );
 466
 467 #ifdef __cplusplus
 468 }
 469 #endif
 470
 471 /***************************************************************
 472 ** External Globals
 473 ***************************************************************/
 474 extern pfTaskData_t *gCurrentTask;
 475 extern pfDictionary_t *gCurrentDictionary;
 476 extern char          gScratch[TIB_SIZE];
 477 extern cell_t         gNumPrimitives;
 478
 479 extern ExecToken     gLocalCompiler_XT;      /* CFA of (LOCAL) compiler. */
 480 extern ExecToken     gNumberQ_XT;         /* XT of NUMBER? */
 481 extern ExecToken     gQuitP_XT;           /* XT of (QUIT) */
 482 extern ExecToken     gAcceptP_XT;         /* XT of ACCEPT */
 483
 484 #define DEPTH_AT_COLON_INVALID (-100)
 485 extern cell_t         gDepthAtColon;
 486
 487 /* Global variables. */
 488 extern cell_t        gVarContext;    /* Points to last name field. */
 489 extern cell_t        gVarState;      /* 1 if compiling. */
 490 extern cell_t        gVarBase;       /* Numeric Base. */
 491 extern cell_t        gVarEcho;       /* Echo input from file. */
 492 extern cell_t        gVarEchoAccept; /* Echo input from ACCEPT. */
 493 extern cell_t        gVarTraceLevel;
 494 extern cell_t        gVarTraceStack;
 495 extern cell_t        gVarTraceFlags;
 496 extern cell_t        gVarQuiet;      /* Suppress unnecessary messages, OK, etc. */
 497 extern cell_t        gVarReturnCode; /* Returned to caller of Forth, eg. UNIX shell. */
 498
 499 extern IncludeFrame  gIncludeStack[MAX_INCLUDE_DEPTH];
 500 extern cell_t         gIncludeIndex;
 501 /***************************************************************
 502 ** Macros
 503 ***************************************************************/
 504
 505
 506 /* Endian specific macros for creating target dictionaries for machines with
 507
 508 ** different endian-ness.
 509
 510 */
 511
 512 #if defined(PF_BIG_ENDIAN_DIC)
 513
 514 #define WRITE_FLOAT_DIC             WriteFloatBigEndian
 515 #define WRITE_CELL_DIC(addr,data)   WriteCellBigEndian((uint8_t *)(addr),(ucell_t)(data))
 516 #define WRITE_SHORT_DIC(addr,data)  Write16BigEndian((uint8_t *)(addr),(uint16_t)(data))
 517 #define READ_FLOAT_DIC              ReadFloatBigEndian
 518 #define READ_CELL_DIC(addr)         ReadCellBigEndian((const uint8_t *)(addr))
 519 #define READ_SHORT_DIC(addr)        Read16BigEndian((const uint8_t *)(addr))
 520
 521 #elif defined(PF_LITTLE_ENDIAN_DIC)
 522
 523 #define WRITE_FLOAT_DIC             WriteFloatLittleEndian
 524 #define WRITE_CELL_DIC(addr,data)   WriteCellLittleEndian((uint8_t *)(addr),(ucell_t)(data))
 525 #define WRITE_SHORT_DIC(addr,data)  Write16LittleEndian((uint8_t *)(addr),(uint16_t)(data))
 526 #define READ_FLOAT_DIC              ReadFloatLittleEndian
 527 #define READ_CELL_DIC(addr)         ReadCellLittleEndian((const uint8_t *)(addr))
 528 #define READ_SHORT_DIC(addr)        Read16LittleEndian((const uint8_t *)(addr))
 529
 530 #else
 531
 532 #define WRITE_FLOAT_DIC(addr,data)  { *((PF_FLOAT *)(addr)) = (PF_FLOAT)(data); }
 533 #define WRITE_CELL_DIC(addr,data)   { *((cell_t *)(addr)) = (cell_t)(data); }
 534 #define WRITE_SHORT_DIC(addr,data)  { *((int16_t *)(addr)) = (int16_t)(data); }
 535 #define READ_FLOAT_DIC(addr)        ( *((PF_FLOAT *)(addr)) )
 536 #define READ_CELL_DIC(addr)         ( *((const ucell_t *)(addr)) )
 537 #define READ_SHORT_DIC(addr)        ( *((const uint16_t *)(addr)) )
 538
 539 #endif
 540
 541
 542 #define HEADER_HERE (gCurrentDictionary->dic_HeaderPtr.Cell)
 543 #define CODE_HERE (gCurrentDictionary->dic_CodePtr.Cell)
 544 #define CODE_COMMA( N ) WRITE_CELL_DIC(CODE_HERE++,(N))
 545 #define NAME_BASE (gCurrentDictionary->dic_HeaderBase)
 546 #define CODE_BASE (gCurrentDictionary->dic_CodeBase)
 547 #define NAME_SIZE (gCurrentDictionary->dic_HeaderLimit - gCurrentDictionary->dic_HeaderBase)
 548 #define CODE_SIZE (gCurrentDictionary->dic_CodeLimit - gCurrentDictionary->dic_CodeBase)
 549
 550 #define IN_CODE_DIC(addr) ( ( ((uint8_t *)(addr)) >= gCurrentDictionary->dic_CodeBase)   && ( ((uint8_t *)(addr)) < gCurrentDictionary->dic_CodeLimit) )
 551
 552 #define IN_NAME_DIC(addr) ( ( ((uint8_t *)(addr)) >= gCurrentDictionary->dic_HeaderBase) && ( ((uint8_t *)(addr)) < gCurrentDictionary->dic_HeaderLimit) )
 553 #define IN_DICS(addr) (IN_CODE_DIC(addr) || IN_NAME_DIC(addr))
 554
 555 /* Address conversion */
 556 #define ABS_TO_NAMEREL( a ) ((cell_t)  (((ucell_t) a) - NAME_BASE ))
 557 #define ABS_TO_CODEREL( a ) ((cell_t)  (((ucell_t) a) - CODE_BASE ))
 558 #define NAMEREL_TO_ABS( a ) ((ucell_t) (((cell_t) a) + NAME_BASE))
 559 #define CODEREL_TO_ABS( a ) ((ucell_t) (((cell_t) a) + CODE_BASE))
 560
 561 /* The check for >0 is only needed for CLONE testing. !!! */
 562 #define IsTokenPrimitive(xt) ((xt<gNumPrimitives) && (xt>=0))
 563
 564 #define FREE_VAR(v) { if (v) { pfFreeMem((void *)(v)); v = 0; } }
 565
 566 #define DATA_STACK_DEPTH (gCurrentTask->td_StackBase - gCurrentTask->td_StackPtr)
 567 #define DROP_DATA_STACK (gCurrentTask->td_StackPtr++)
 568 #define POP_DATA_STACK (*gCurrentTask->td_StackPtr++)
 569 #define PUSH_DATA_STACK(x) {*(--(gCurrentTask->td_StackPtr)) = (cell_t) x; }
 570
 571 /* Force Quad alignment. */
 572 #define QUADUP(x) (((x)+3)&~3)
 573
 574 #ifndef MIN
 575 #define MIN(a,b)  ( ((a)<(b)) ? (a) : (b) )
 576 #endif
 577 #ifndef MAX
 578 #define MAX(a,b)  ( ((a)>(b)) ? (a) : (b) )
 579 #endif
 580
 581 #ifndef TOUCH
 582     #define TOUCH(argument) ((void)argument)
 583 #endif
 584
 585 /***************************************************************
 586 ** I/O related macros
 587 ***************************************************************/
 588
 589 #define EMIT(c)  ioEmit(c)
 590 #define EMIT_CR  EMIT('\n');
 591
 592 #define MSG(cs)   pfMessage(cs)
 593 #define ERR(x)    MSG(x)
 594
 595 #define DBUG(x)  /* PRT(x) */
 596 #define DBUGX(x) /* DBUG(x) */
 597
 598 #define MSG_NUM_D(msg,num) { MSG(msg); ffDot((cell_t) num); EMIT_CR; }
 599 #define MSG_NUM_H(msg,num) { MSG(msg); ffDotHex((cell_t) num); EMIT_CR; }
 600
 601 #define DBUG_NUM_D(msg,num) { pfDebugMessage(msg); pfDebugPrintDecimalNumber((cell_t) num); pfDebugMessage("\n"); }
 602
 603 #endif  /* _pf_guts_h */