1 /* @(#) pf_guts.h 98/01/28 1.4 */
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5 /***************************************************************
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6 ** Include file for PForth, a Forth based on 'C'
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9 ** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom
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11 ** The pForth software code is dedicated to the public domain,
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12 ** and any third party may reproduce, distribute and modify
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13 ** the pForth software code or any derivative works thereof
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14 ** without any compensation or license. The pForth software
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15 ** code is provided on an "as is" basis without any warranty
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16 ** of any kind, including, without limitation, the implied
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17 ** warranties of merchantability and fitness for a particular
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18 ** purpose and their equivalents under the laws of any jurisdiction.
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20 ***************************************************************/
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23 ** PFORTH_VERSION changes when PForth is modified and released.
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24 ** See README file for version info.
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26 #define PFORTH_VERSION "24"
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29 ** PFORTH_FILE_VERSION changes when incompatible changes are made
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30 ** in the ".dic" file format.
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32 ** FV3 - 950225 - Use ABS_TO_CODEREL for CodePtr. See file "pf_save.c".
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33 ** FV4 - 950309 - Added NameSize and CodeSize to pfSaveForth().
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34 ** FV5 - 950316 - Added Floats and reserved words.
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35 ** FV6 - 961213 - Added ID_LOCAL_PLUSSTORE, ID_COLON_P, etc.
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36 ** FV7 - 971203 - Added ID_FILL, (1LOCAL@), etc., ran out of reserved, resorted.
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37 ** FV8 - 980818 - Added Endian flag.
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39 #define PF_FILE_VERSION (8) /* Bump this whenever primitives added. */
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40 #define PF_EARLIEST_FILE_VERSION (8) /* earliest one still compatible */
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42 /***************************************************************
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43 ** Sizes and other constants
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44 ***************************************************************/
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46 #define TIB_SIZE (256)
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59 #define FLAG_PRECEDENCE (0x80)
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60 #define FLAG_IMMEDIATE (0x40)
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61 #define FLAG_SMUDGE (0x20)
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62 #define MASK_NAME_SIZE (0x1F)
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64 /* Debug TRACE flags */
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65 #define TRACE_INNER (0x0002)
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66 #define TRACE_COMPILE (0x0004)
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67 #define TRACE_SPECIAL (0x0008)
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69 /* Numeric types returned by NUMBER? */
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70 #define NUM_TYPE_BAD (0)
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71 #define NUM_TYPE_SINGLE (1)
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72 #define NUM_TYPE_DOUBLE (2)
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73 #define NUM_TYPE_FLOAT (3)
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75 #define CREATE_BODY_OFFSET (3*sizeof(cell))
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77 /***************************************************************
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78 ** Primitive Token IDS
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79 ** Do NOT change the order of these IDs or dictionary files will break!
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80 ***************************************************************/
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81 enum cforth_primitive_ids
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83 ID_EXIT = 0, /* ID_EXIT must always be zero. */
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84 /* Do NOT change the order of these IDs or dictionary files will break! */
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115 ID_COMP_GREATERTHAN,
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118 ID_COMP_U_GREATERTHAN,
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119 ID_COMP_U_LESSTHAN,
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120 ID_COMP_ZERO_EQUAL,
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121 ID_COMP_ZERO_GREATERTHAN,
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122 ID_COMP_ZERO_LESSTHAN,
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123 ID_COMP_ZERO_NOT_EQUAL,
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155 ID_FILE_REPOSITION,
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187 ID_LOCAL_PLUSSTORE,
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202 ID_NAME_TO_PREVIOUS,
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255 ID_VAR_HEADERS_BASE,
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256 ID_VAR_HEADERS_LIMIT,
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257 ID_VAR_HEADERS_PTR,
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260 ID_VAR_RETURN_CODE,
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264 ID_VAR_TRACE_FLAGS,
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265 ID_VAR_TRACE_LEVEL,
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266 ID_VAR_TRACE_STACK,
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278 /* If you add a word here, take away one reserved word below. */
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279 #ifdef PF_SUPPORT_FP
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280 /* Only reserve space if we are adding FP so that we can detect
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281 ** unsupported primitives when loading dictionary.
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305 ID_FP_F_ZERO_LESS_THAN,
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306 ID_FP_F_ZERO_EQUALS,
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348 /* Add new IDs by replacing reserved IDs or extending FP routines. */
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349 /* Do NOT change the order of these IDs or dictionary files will break! */
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350 NUM_PRIMITIVES /* This must always be LAST */
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355 /***************************************************************
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357 ***************************************************************/
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358 /* ANSI standard definitions needed by pForth */
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359 #define THROW_ABORT (-1)
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360 #define THROW_ABORT_QUOTE (-2)
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361 #define THROW_STACK_OVERFLOW (-3)
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362 #define THROW_STACK_UNDERFLOW (-4)
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363 #define THROW_UNDEFINED_WORD (-13)
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364 #define THROW_EXECUTING (-14)
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365 #define THROW_PAIRS (-22)
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366 #define THROW_FLOAT_STACK_UNDERFLOW ( -45)
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367 #define THROW_QUIT (-56)
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369 /* THROW codes unique to pForth */
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370 #define THROW_BYE (-256) /* Exit program. */
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371 #define THROW_SEMICOLON (-257) /* Error detected at ; */
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372 #define THROW_DEFERRED (-258) /* Not a deferred word. Used in system.fth */
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374 /***************************************************************
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376 ***************************************************************/
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378 typedef struct pfTaskData_s
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380 cell *td_StackPtr; /* Primary data stack */
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381 cell *td_StackBase;
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382 cell *td_StackLimit;
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383 cell *td_ReturnPtr; /* Return stack */
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384 cell *td_ReturnBase;
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385 cell *td_ReturnLimit;
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386 #ifdef PF_SUPPORT_FP
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387 PF_FLOAT *td_FloatStackPtr;
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388 PF_FLOAT *td_FloatStackBase;
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389 PF_FLOAT *td_FloatStackLimit;
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391 cell *td_InsPtr; /* Instruction pointer, "PC" */
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392 FileStream *td_InputStream;
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394 char td_TIB[TIB_SIZE]; /* Buffer for terminal input. */
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395 cell td_IN; /* Index into Source */
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396 cell td_SourceNum; /* #TIB after REFILL */
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397 char *td_SourcePtr; /* Pointer to TIB or other source. */
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398 int32 td_LineNumber; /* Incremented on every refill. */
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399 cell td_OUT; /* Current output column. */
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402 typedef struct pfNode
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404 struct pfNode *n_Next;
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405 struct pfNode *n_Prev;
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408 /* Structure of header entry in dictionary. These will be stored in dictionary specific endian format*/
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409 typedef struct cfNameLinks
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411 cell cfnl_PreviousName; /* name relative address of previous */
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412 ExecToken cfnl_ExecToken; /* Execution token for word. */
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413 /* Followed by variable length name field. */
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416 #define PF_DICF_ALLOCATED_SEGMENTS ( 0x0001)
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417 typedef struct pfDictionary_s
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421 /* Headers contain pointers to names and dictionary. */
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423 uint8 *dic_HeaderBaseUnaligned;
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425 uint8 *dic_HeaderBase;
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431 uint8 *dic_HeaderLimit;
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432 /* Code segment contains tokenized code and data. */
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434 uint8 *dic_CodeBaseUnaligned;
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436 uint8 *dic_CodeBase;
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442 uint8 *dic_CodeLimit;
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445 /* Save state of include when nesting files. */
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446 typedef struct IncludeFrame
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448 FileStream *inf_FileID;
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449 int32 inf_LineNumber;
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450 int32 inf_SourceNum;
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452 char inf_SaveTIB[TIB_SIZE];
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455 #define MAX_INCLUDE_DEPTH (16)
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457 /***************************************************************
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459 ***************************************************************/
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465 int pfCatch( ExecToken XT );
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471 /***************************************************************
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472 ** External Globals
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473 ***************************************************************/
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474 extern pfTaskData_t *gCurrentTask;
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475 extern pfDictionary_t *gCurrentDictionary;
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476 extern char gScratch[TIB_SIZE];
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477 extern int32 gNumPrimitives;
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479 extern ExecToken gLocalCompiler_XT; /* CFA of (LOCAL) compiler. */
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480 extern ExecToken gNumberQ_XT; /* XT of NUMBER? */
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481 extern ExecToken gQuitP_XT; /* XT of (QUIT) */
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482 extern ExecToken gAcceptP_XT; /* XT of ACCEPT */
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484 #define DEPTH_AT_COLON_INVALID (-100)
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485 extern int32 gDepthAtColon;
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487 /* Global variables. */
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488 extern char *gVarContext; /* Points to last name field. */
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489 extern cell gVarState; /* 1 if compiling. */
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490 extern cell gVarBase; /* Numeric Base. */
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491 extern cell gVarEcho; /* Echo input from file. */
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492 extern cell gVarEchoAccept; /* Echo input from ACCEPT. */
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493 extern cell gVarTraceLevel;
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494 extern cell gVarTraceStack;
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495 extern cell gVarTraceFlags;
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496 extern cell gVarQuiet; /* Suppress unnecessary messages, OK, etc. */
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497 extern cell gVarReturnCode; /* Returned to caller of Forth, eg. UNIX shell. */
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499 extern IncludeFrame gIncludeStack[MAX_INCLUDE_DEPTH];
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500 extern int32 gIncludeIndex;
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501 /***************************************************************
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503 ***************************************************************/
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506 /* Endian specific macros for creating target dictionaries for machines with
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508 ** different endian-ness.
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512 #if defined(PF_BIG_ENDIAN_DIC)
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514 #define WRITE_FLOAT_DIC WriteFloatBigEndian
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515 #define WRITE_LONG_DIC(addr,data) WriteLongBigEndian((uint32 *)(addr),(uint32)(data))
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516 #define WRITE_SHORT_DIC(addr,data) WriteShortBigEndian((uint16 *)(addr),(uint16)(data))
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517 #define READ_FLOAT_DIC ReadFloatBigEndian
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518 #define READ_LONG_DIC(addr) ReadLongBigEndian((const uint32 *)(addr))
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519 #define READ_SHORT_DIC(addr) ReadShortBigEndian((const uint16 *)(addr))
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521 #elif defined(PF_LITTLE_ENDIAN_DIC)
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523 #define WRITE_FLOAT_DIC WriteFloatLittleEndian
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524 #define WRITE_LONG_DIC(addr,data) WriteLongLittleEndian((uint32 *)(addr),(uint32)(data))
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525 #define WRITE_SHORT_DIC(addr,data) WriteShortLittleEndian((uint16 *)(addr),(uint16)(data))
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526 #define READ_FLOAT_DIC ReadFloatLittleEndian
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527 #define READ_LONG_DIC(addr) ReadLongLittleEndian((const uint32 *)(addr))
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528 #define READ_SHORT_DIC(addr) ReadShortLittleEndian((const uint16 *)(addr))
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532 #define WRITE_FLOAT_DIC(addr,data) { *((PF_FLOAT *)(addr)) = (PF_FLOAT)(data); }
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533 #define WRITE_LONG_DIC(addr,data) { *((int32 *)(addr)) = (int32)(data); }
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534 #define WRITE_SHORT_DIC(addr,data) { *((int16 *)(addr)) = (int16)(data); }
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535 #define READ_FLOAT_DIC(addr) ( *((PF_FLOAT *)(addr)) )
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536 #define READ_LONG_DIC(addr) ( *((const uint32 *)(addr)) )
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537 #define READ_SHORT_DIC(addr) ( *((const uint16 *)(addr)) )
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542 #define HEADER_HERE (gCurrentDictionary->dic_HeaderPtr.Cell)
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543 #define CODE_HERE (gCurrentDictionary->dic_CodePtr.Cell)
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544 #define CODE_COMMA( N ) WRITE_LONG_DIC(CODE_HERE++,(N))
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545 #define NAME_BASE (gCurrentDictionary->dic_HeaderBase)
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546 #define CODE_BASE (gCurrentDictionary->dic_CodeBase)
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547 #define NAME_SIZE (gCurrentDictionary->dic_HeaderLimit - gCurrentDictionary->dic_HeaderBase)
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548 #define CODE_SIZE (gCurrentDictionary->dic_CodeLimit - gCurrentDictionary->dic_CodeBase)
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550 #define IN_CODE_DIC(addr) ( ( ((uint8 *)(addr)) >= gCurrentDictionary->dic_CodeBase) && ( ((uint8 *)(addr)) < gCurrentDictionary->dic_CodeLimit) )
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552 #define IN_NAME_DIC(addr) ( ( ((uint8 *)(addr)) >= gCurrentDictionary->dic_HeaderBase) && ( ((uint8 *)(addr)) < gCurrentDictionary->dic_HeaderLimit) )
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553 #define IN_DICS(addr) (IN_CODE_DIC(addr) || IN_NAME_DIC(addr))
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555 /* Address conversion */
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556 #define ABS_TO_NAMEREL( a ) ((int32) (((uint8 *) a) - NAME_BASE ))
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557 #define ABS_TO_CODEREL( a ) ((int32) (((uint8 *) a) - CODE_BASE ))
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558 #define NAMEREL_TO_ABS( a ) ((char *) (((int32) a) + NAME_BASE))
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559 #define CODEREL_TO_ABS( a ) ((cell *) (((int32) a) + CODE_BASE))
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561 /* The check for >0 is only needed for CLONE testing. !!! */
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562 #define IsTokenPrimitive(xt) ((xt<gNumPrimitives) && (xt>=0))
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564 #define FREE_VAR(v) { if (v) { pfFreeMem(v); v = NULL; } }
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566 #define DATA_STACK_DEPTH (gCurrentTask->td_StackBase - gCurrentTask->td_StackPtr)
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567 #define DROP_DATA_STACK (gCurrentTask->td_StackPtr++)
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568 #define POP_DATA_STACK (*gCurrentTask->td_StackPtr++)
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569 #define PUSH_DATA_STACK(x) {*(--(gCurrentTask->td_StackPtr)) = (cell) x; }
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571 /* Force Quad alignment. */
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572 #define QUADUP(x) (((x)+3)&~3)
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574 #define MIN(a,b) ( ((a)<(b)) ? (a) : (b) )
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575 #define MAX(a,b) ( ((a)>(b)) ? (a) : (b) )
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579 #define TOUCH(argument) ((void)argument)
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582 /***************************************************************
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583 ** I/O related macros
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584 ***************************************************************/
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586 #define EMIT(c) ioEmit(c)
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587 #define EMIT_CR EMIT('\n');
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589 #define MSG(cs) pfMessage(cs)
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590 #define ERR(x) MSG(x)
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592 #define DBUG(x) /* PRT(x) */
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593 #define DBUGX(x) /* DBUG(x) */
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595 #define MSG_NUM_D(msg,num) { MSG(msg); ffDot((int32) num); EMIT_CR; }
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596 #define MSG_NUM_H(msg,num) { MSG(msg); ffDotHex((int32) num); EMIT_CR; }
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598 #define DBUG_NUM_D(msg,num) { pfDebugMessage(msg); pfDebugPrintDecimalNumber((int32) num); pfDebugMessage("\n"); }
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600 #endif /* _pf_guts_h */
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